CN112703657B

CN112703657B - Power supply device and power supply system

Info

Publication number: CN112703657B
Application number: CN201980059984.1A
Authority: CN
Inventors: 李知宪; 金永根; 金羲重; 林一亨
Original assignee: LS Electric Co Ltd
Current assignee: LS Electric Co Ltd
Priority date: 2018-09-13
Filing date: 2019-09-10
Publication date: 2024-11-26
Anticipated expiration: 2039-09-10
Also published as: KR102299860B1; KR20200031043A; CN112703657A

Abstract

The present invention relates to a power supply device and a power supply system capable of uninterrupted power supply, and relates to a power supply device and a power supply system that are provided with a circuit breaker for limiting the connection of a power bus to which a plurality of power supply devices are connected, and control the reception/supply of power by opening and closing the circuit breaker according to various conditions occurring in the system.

Description

Power supply device and power supply system

Technical Field

The invention relates to a power supply device and a power supply system capable of supplying power uninterruptedly.

Background

The background of the invention relates to a system comprising a plurality of power supply devices.

The systems in which the plurality of power supply devices supply power to the respective loads may be commonly connected by a DC bus. In this way, when connected to the bus in common, there is an advantage that power can be received/supplied by the DC bus and the adjacent power supply device. However, when the system is constructed in this way, there are limits such as stability problems of the system, difficulty in controlling the reception/supply of power, lack of corresponding schemes in the event of an accident, and the like.

If the compatibility between devices is reduced by providing a plurality of power supply devices having a complicated configuration, the system operation cannot be performed stably. In addition, in the case where the load supplied by each device is an important load that needs to be supplied all the time, an additional UPS (Uninterrupted Power Supply; uninterruptible power supply) device needs to be provided to cope with the abnormal state. In the case of the UPS device, the system configuration becomes more complicated, and it becomes difficult to provide the UPS device itself due to the limitation in terms of structure/design. Further, as the configuration becomes complicated, the control of each device and system can only become more complicated, and the risk of occurrence of a malfunction, accident, or the like becomes high. Finally, it is difficult to perform stable and reliable power supply, and thus the operation of the load is only performed unstably, and an appropriate operation response to various accidents cannot be made.

Disclosure of Invention

Problems to be solved by the invention

The present invention aims to improve the limitation of the prior art as described above.

That is, the present invention provides a power supply device and a power supply system that can improve the limits of the prior art.

Specifically, an object of the present invention is to provide a power supply device and a power supply system in which power is received and supplied between a plurality of power supply devices provided in the system, and thereby the plurality of power supply devices can perform a UPS function between each other, respectively.

Another object of the present invention is to provide a power supply device and a power supply system that can effectively maintain power supply to a load in various abnormal situations.

Further, another object of the present invention is to provide a power supply device and a power supply system capable of achieving stable and appropriate power supply reception/supply for various abnormal situations.

Means for solving the problems

The power supply device and the power supply system according to the present invention for solving the above-described problems have the following means for solving the problems: a circuit breaker is provided for limiting connection to a power bus to which a plurality of power supply devices are connected, and the circuit breaker is opened and closed according to various conditions occurring in a system to control reception and supply of power.

That is, the power supply device and the power supply system according to the present invention are characterized in that a circuit breaker corresponding to a plurality of power supply devices is provided, and the circuit breaker is controlled to receive and supply power through a power bus, thereby performing a UPS function between the plurality of power supply devices.

The technical features described above can be applied to a power supply device and a power supply system, and embodiments of the power supply device and the power supply system having the technical features described above are provided in the present specification.

An embodiment of the power supply device according to the present invention, which uses the technical features described above as means for solving the problems, includes: a plurality of first power conversion means for converting power received from each of a plurality of power supplies into DC power; one or more second power conversion devices that convert the DC power supply into a drive power supply and supply the drive power to a load; a first circuit breaker disposed between a power source terminal to which a first output terminal of each of the plurality of first power conversion devices and an input terminal of the second power conversion device, which are connected to an opening/closing unit that limits an output of the DC power source, are connected, and a bus that is connected to the power source terminal and that passes the DC power source; and a second circuit breaker disposed between a second output terminal of any one of the plurality of first power conversion devices and the bus bar; the first circuit breaker changes an opening and closing according to a state of at least one of the DC power supply, the driving power supply, the plurality of first power conversion devices, and the load, thereby connecting or restricting the DC power supply between the power supply terminal and the bus bar; the second circuit breaker changes an opening and closing according to a state of at least one of the DC power source, the driving power source, the plurality of first power conversion devices, and the load, thereby connecting or restricting the DC power source between the second output terminal and the bus.

In an embodiment of the power supply device, the plurality of power supplies may include a first AC power source and a second AC power source that supply AC power.

In an embodiment of the power supply device, the plurality of power supply sources may further include a battery storing a DC power source, and when the supply of the DC power source to the second power conversion device is interrupted, the power source stored in the battery may be supplied to the first power conversion device while the supply of the DC power source is resumed.

In an embodiment of the power supply device, the interruption of the supply of the DC power may be one or more of interruption of the supply of the first ac power and the second ac power and interruption of the operation of the plurality of first power conversion devices that receive power from the first ac power and the second ac power.

In an embodiment of the power supply device, the battery supplies the stored power to the plurality of first power conversion devices without interruption until the supply of the DC power is switched to resume after the interruption of the supply of the DC power.

In an embodiment of the power supply device, the plurality of first power conversion devices may include a first conversion device, a second conversion device, and a third conversion device, which are connected to the first ac power source, the battery, and the second ac power source, respectively, and receive power from the connected power supply source.

In one embodiment of the power supply device, the plurality of first power conversion devices may supply the DC power to the second power conversion device by operating any one of the first conversion device, the second conversion device, and the third conversion device.

In an embodiment of the power supply device, in a case where power supply to the conversion device that supplies the DC power to the second power conversion device is interrupted, the plurality of first power conversion devices may supply the DC power to the second power conversion device through conversion devices other than the conversion device.

In one embodiment of the power supply device, the power supply to the switching device is interrupted when an abnormal state is detected at any one or more of the switching device, a power supply source connected to the switching device, and a rated value of the DC power source.

In an embodiment of the power supply device, the plurality of first power conversion devices may supply the DC power to the second power conversion device through the second conversion device during a period in which the conversion device is switched to the other conversion device.

In an embodiment of the power supply device, the at least one state may be at least one of a case where the DC power source is changed from an initial state, a case where the driving power source is changed from an initial state, a case where the operation states of the plurality of first power conversion devices are changed, and a case where the driving state of the load is changed.

In an embodiment of the power supply device, the first circuit breaker may be closed when the DC power is connected between the power source terminal and the bus bar, and open when the DC power is limited between the power source terminal and the bus bar.

In an embodiment of the power supply device, in the case where power supply to the conversion device connected to the first ac power source and the second ac power source is interrupted, the first circuit breaker may be closed to connect the power source terminal and the bus bar, thereby making the DC power source conductive from the bus bar to the power source terminal and supplied to the second power conversion device.

In an embodiment of the power supply device, after the power supply of the conversion device connected to the first ac power source and the second ac power source is interrupted, the DC power may be supplied to the second power conversion device by the conversion device connected to the battery until the DC power turned on from the bus is supplied to the second power conversion device.

In an embodiment of the power supply device, the first circuit breaker may be closed only if the second circuit breaker is open.

In an embodiment of the power supply device, the second circuit breaker may be closed when the DC power source is connected between the second output terminal and the bus bar, and open when the DC power source is limited between the second output terminal and the bus bar.

In an embodiment of the power supply device, in case of interruption of power supply of other power supply devices connected to the bus bar, the second circuit breaker may be brought into a closed circuit to connect the second output terminal and the bus bar, thereby conducting the DC power from the second output terminal to the bus bar, and supplying the DC power to the other power supply devices.

In an embodiment of the power supply device, the second circuit breaker may be closed only in case of an open-close unit of a switching device connected to the second circuit breaker and the first circuit breaker being open-circuited.

In an embodiment of the power supply device, a control portion that controls the plurality of first power conversion devices, the second power conversion devices, and the first circuit breaker, the second circuit breaker, and monitors a state of at least one or more of the plurality of power supply sources, the plurality of first power conversion devices, the DC power source, the driving power source, and the load, and controls the first circuit breaker and the second circuit breaker to connect the power source terminal or the second output terminal to the bus according to a monitoring result may be further included.

Another embodiment of the power supply device according to the present invention, which has the technical features described above as means for solving the problems, includes: a plurality of converters that convert power received from each of the plurality of power supplies into DC power; a second power conversion device that converts the DC power supply into a driving power supply for driving a plurality of loads, and supplies the driving power supply to the plurality of loads; a first circuit breaker provided between a first output terminal to which outputs of the plurality of converters are commonly connected and a bus bar connected to the first output terminal, limiting connection of the first output terminal and the bus bar; a second circuit breaker provided between a second output terminal, which is an output of any one of the plurality of converters, and the bus bar connected to the second output terminal, and limiting connection of the second output terminal and the bus bar; and a control unit that controls the switching of each of the first and second circuit breakers in accordance with the state of the DC power supply or the driving power supply, thereby controlling the reception/supply of the DC power supply by the bus.

In an embodiment of the power supply device, the control section may select any one of the plurality of converters according to states of the plurality of power supply sources, and control to transfer the DC power source to each of the second power conversion devices by the selected converter.

In an embodiment of the power supply device, when an abnormality occurs in any one or more of a converter that is transmitting the DC power to the second power conversion device and a power supply source corresponding to the converter, the control portion may control to transmit the DC power to the second power conversion device by a converter other than the converter.

In an embodiment of the power supply apparatus, when an abnormality occurs in the plurality of power supply sources, the control section may control to close the first circuit breaker, thereby receiving the DC power from other power supply apparatuses connected to the bus bar through the bus bar.

In an embodiment of the power supply device, when an abnormality occurs in other power supply devices connected to the bus bar, the control portion may control to close the second circuit breaker, thereby supplying DC power to the other power supply devices from a converter connected to the second circuit breaker through the bus bar.

On the other hand, an embodiment of the power supply system according to the present invention, which uses the technical features described above as means for solving the problems, includes: a plurality of power boards for converting power received from each of a plurality of power supplies into DC power, converting the DC power into driving power for a load, and supplying the load with the driving power; a bus bar to which a power source terminal to which the DC power is input from each of the plurality of power source boards and a second output terminal to which the DC power is output separately from the power source terminal are connected, to turn on the DC power converted at the plurality of power source boards; a plurality of first circuit breakers arranged between the power source terminals and the bus bars; and a plurality of second circuit breakers disposed between each of the second output terminals and the bus bar; the plurality of first circuit breakers may change opening and closing according to an operation state of one or more power boards among the plurality of power boards, thereby connecting or restricting the DC power between the power source terminal and the bus; the plurality of second circuit breakers may change opening and closing according to an operation state of one or more power boards among the plurality of power boards, thereby connecting or restricting the DC power between the second output terminal and the bus.

In an embodiment of the power supply system, the plurality of power supplies may include a first alternating current power supply that supplies an AC power, a second alternating current power supply, and a battery power supply that stores a DC power supply, and the power stored in the battery is supplied to the plurality of power boards during a period in which the power supply is switched to be restored in a case where the power supply of the first alternating current power supply and the second alternating current power supply is interrupted.

In an embodiment of the power supply system, after the power supply is interrupted, the stored power may be supplied to the plurality of power boards by the battery power supply without interruption until the power supply is switched to resume.

In an embodiment of the power supply system, the plurality of power supplies may further include an emergency power supply that may supply emergency power to the load in a case where power supply of the first ac power supply, the second ac power supply, and the battery power supply is interrupted.

In an embodiment of the power supply system, the plurality of power boards may include: a plurality of first power conversion devices converting power received from the plurality of power supplies into the DC power; and a second power conversion device that converts the DC power received from the plurality of first power conversion devices into the driving power and supplies the driving power to the load.

In an embodiment of the power supply system, the plurality of power boards may supply the DC power to the second power conversion device through any one of the plurality of first power conversion devices according to states of the plurality of power supplies.

In an embodiment of the power supply system, in case of interruption of power supply to the conversion means that supplies the DC power to the second power conversion means, the plurality of power strips may supply the DC power to the second power conversion means through conversion means other than the conversion means.

In an embodiment of the power supply system, the plurality of first power conversion devices may supply the DC power to the second power conversion device by a conversion device receiving power from the battery power source during switching of the conversion device to the other conversion device.

In an embodiment of the power supply system, the plurality of first circuit breakers may be closed when the DC power is connected between the power source terminal and the bus bar and open when the DC power is limited between the power source terminal and the bus bar, and the plurality of second circuit breakers may be closed when the DC power is connected between the second output terminal and the bus bar and open when the DC power is limited between the second output terminal and the bus bar.

In an embodiment of the power supply system, in the case where one or more of the plurality of power supply boards is interrupted among the plurality of first circuit breakers and the plurality of second circuit breakers, the first circuit breaker of the power supply board of the power supply interruption and the second circuit breaker of the power supply board adjacent to the power supply board of the power supply interruption may be brought into a closed circuit, thereby connecting the power supply board of the power supply interruption and the adjacent power supply board to the bus bar to supply the DC power from the adjacent power supply board to the power supply board of the power supply interruption.

In an embodiment of the power supply system, after the power supply interruption, the power supply board for power supply interruption may receive the DC power supply from a conversion device connected to the battery power supply, until the DC power conducted from the adjacent power supply board is supplied to the power supply board for power supply interruption.

In an embodiment of the power supply system, the adjacent power supply board may be a power supply board adjacent to the power supply interrupted power supply board and having no action of the switching device outputting the DC power to the second output terminal.

In an embodiment of the power supply system, the power supply system may further include a control device that monitors a state of the plurality of power boards and at least one of the first and second circuit breakers, and controls the plurality of power boards and the at least one of the first and second circuit breakers according to a monitoring result.

Further, an embodiment of the power supply system according to the present invention, which uses the technical features described above as means for solving the problems, includes: a plurality of loads; a plurality of power boards converting power received from each of a plurality of power supplies into DC power, and converting the DC power into driving power for driving the plurality of loads, the driving power being supplied to the plurality of loads; a bus to which output terminals outputting the DC power from each of the plurality of power boards are commonly connected, the DC power converted at the plurality of power boards being transferred to the bus; a plurality of first circuit breakers provided on a circuit connecting a first output terminal, to which an output of the DC power supply is commonly connected, of the output terminals and the bus bar, limiting connection of the first output terminal and the bus bar; a plurality of second circuit breakers provided on a circuit connecting a second output terminal of the DC power supply, which is separately separated from the output of the output terminal, and the bus bar, and limiting connection of the second output terminal and the bus bar; and a control device for controlling the opening and closing of each of the first and second circuit breakers according to the state of each of the plurality of power boards, thereby controlling the reception/supply of the DC power between the plurality of power boards through the bus.

In an embodiment of the power supply system, the plurality of power boards may select any one of a plurality of converters that convert the DC power according to states of the plurality of power supplies, and transfer the DC power to a second power conversion device that converts the driving power using the selected converter.

In an embodiment of the power supply system, when an abnormality occurs in any one or more of a converter that is transmitting the DC power to a second power conversion device that converts the driving power and a power supply corresponding to the converter, the plurality of power strips may transmit the DC power to the second power conversion device with converters other than the converter.

In an embodiment of the power supply system, when an abnormality occurs in any one or more of the plurality of power boards, the control device may control to close a first circuit breaker of the power board in which the abnormality occurs and a second circuit breaker of a power board nearest to the power board, thereby causing the power board in which the abnormality occurs to receive the DC power from the adjacent power board through the bus bar.

The power supply device and the power supply system according to the present invention as described above can be applied to a power supply device, a power supply system, and a method of operating a power supply system that supply/use DC power. In particular, it can be effectively applied to a DC UPS module and a power supply system provided with the DC UPS module. However, the technology disclosed in the present specification is not limited to this, and may be applied to any power supply device, power supply control device, power supply system, power control system, factory control method, energy storage system, control method or operation method of energy storage system, motor control group for controlling a plurality of motor loads, motor control system, motor operation system, and the like, to which the above-described technical idea is applicable.

Effects of the invention

According to the power supply device and the power supply system of the present invention, the respective circuit breakers of the plurality of power supply devices connected to the power supply bus are controlled, whereby the reception/supply of the power supply is controlled through the power supply bus, thereby having the effect of being able to perform the UPS function between the plurality of power supply devices.

Therefore, even when various abnormal conditions occur in the grid/system, the power supply to the load can be maintained without interruption.

That is, the power supply device and the power supply system according to the present invention have an effect that an appropriate and stable power supply countermeasure can be established against various abnormal conditions occurring in the power grid/system.

Further, according to the power supply device and the power supply system of the present invention, the circuit breakers of each of the plurality of power supply devices connected to the power supply bus are controlled according to the generated situation, and the reception/supply of the power supply is controlled by the power supply bus, whereby an effective operation can be achieved by a minimum means.

Further, the power supply device and the power supply system according to the present invention have an effect of improving stability, reliability, and efficiency of the operation of the high-capacity system.

As a result, the power supply device and the power supply system according to the present invention solve the above-described problems, and have an effect of improving the limit of the conventional art.

Drawings

Fig. 1 is a configuration diagram showing the configuration of a power supply device according to the present invention.

Fig. 2 is a schematic diagram showing a specific circuit configuration of the power supply device of the present invention.

Fig. 3 is a configuration diagram showing a specific configuration of the power supply device of the present invention.

Fig. 4 is a configuration diagram showing a configuration of a power supply system provided with a power supply device according to the present invention.

Fig. 5 is an example of fig. 1 showing a specific embodiment of the power supply system of the present invention.

Fig. 6 is an example fig. 2 showing a specific embodiment of the power supply system of the present invention.

Fig. 7 is an example of fig. 3 showing a specific embodiment of the power supply system of the present invention.

Fig. 8 is an example of fig. 4 showing a specific embodiment of the power supply system of the present invention.

Detailed Description

Note that technical terms used in the present specification are used only for explaining specific embodiments, and are not used to limit the technical ideas disclosed in the present specification. In addition, unless defined otherwise in the specification, technical terms used in the specification should be construed in a sense generally understood by those skilled in the art and should not be construed as an excessive generalization or an excessive shrinkage. In addition, when technical terms used in the present specification are erroneous technical terms that cannot accurately express the technical ideas disclosed in the present specification, the technical terms that can be correctly understood by those skilled in the art should be substituted and understood. In addition, the general terms used in the present specification should be interpreted according to dictionary definitions or according to the preceding and following articles, and should not be interpreted in an excessively contracted meaning.

In addition, unless the context clearly indicates otherwise, singular expressions shall include plural expressions. In the present specification, terms such as "component" and "comprising" should not be interpreted as necessarily including all of the various components and steps described in the specification, but should be interpreted as excluding the existence of a part of the components and steps, or may include additional components and steps.

Hereinafter, embodiments disclosed in the present specification will be described in detail with reference to the drawings, and the same or similar constituent elements are given the same reference numerals regardless of the drawing numbers, and repeated description thereof will be omitted.

In the process of describing the technology disclosed in the present specification, when it is determined that the detailed description of the related known technology will obscure the technical gist disclosed in the present specification, a detailed description thereof will be omitted. In addition, it is to be noted that the drawings are only for easy understanding of the technical ideas disclosed in the present specification, and the technical ideas of the present invention should not be limited by the drawings.

First, the power supply device of the present invention will be described.

The embodiments of the power supply device described below may be implemented independently or may be implemented in combination with the embodiments of the power supply system described below.

The power supply device may be implemented in a combination or different form from the embodiments described below.

The power supply means may be a module comprising a plurality of power control means.

The power supply device may be a power supply device in which the plurality of power supply control devices are packaged.

For example, the power supply device may be a power panel in which the plurality of power supply control devices are packaged.

The power supply device may be a packaged power panel that is installed in a building requiring high power, such as a power plant, a large-sized device, a factory, a building, or an apartment, and supplies power.

The power supply device may be a package type power panel disposed in a certain space.

The power supply device may be packaged with the plurality of power supply control devices and supply power to the load.

As shown in fig. 1, the supply device 100 (hereinafter, referred to as a supply device) includes: a plurality of first power conversion devices 110 converting power received from each of the plurality of power supplies 10 into DC power; one or more second power conversion devices 120 that convert the DC power into a driving power and supply the driving power to the load 20; a first circuit breaker 130a disposed between a power source terminal to which a first output terminal of each of the plurality of first power conversion devices 110 and an input terminal of the second power conversion device 120, which are connected to an opening/closing unit that limits an output of the DC power source, are connected, and a bus bar 1 connected to the power source terminal to pass the DC power source; and a second breaker 130b disposed between the bus bar 1 and a second output terminal of any one of the plurality of first power conversion devices 110.

In the supply device 100, the first circuit breaker 130a may change an opening and closing according to a state of at least one of the DC power source, the driving power source, the plurality of first power conversion devices 110, and the load 20, thereby connecting or restricting the DC power source between the power source terminal and the bus bar 1. The second circuit breaker 130b changes opening and closing according to the state of any one of the DC power source, the driving power source, the plurality of first power conversion devices 110, and the load 20, thereby connecting or restricting the DC power source between the second output terminal and the bus bar 1.

As such, the supply apparatus 100 includes the first power conversion apparatus 110, the second power conversion apparatus 120, and the first and second circuit breakers 130a and 130b, and converts the power received from the plurality of power sources 10 into the driving power and supplies the driving power to the load 20.

The specific configuration of the supply apparatus 100 including the first and second power conversion apparatuses 110 and 120 and the first and second circuit breakers 130a and 130b may be as shown in fig. 2 and 3.

The plurality of power sources 10 supplying power to the supply device 100 may be externally connected to the plurality of first power conversion devices 110, and supply power to the respective plurality of first power conversion devices 110.

The plurality of power supplies 10 may be connected to the plurality of first power conversion devices 110, and may supply a dc power source or an ac power source to the plurality of first power conversion devices 110.

The plurality of power supplies 10 may include power supplies different from each other.

As shown in fig. 2 and 3, the plurality of power supplies 10 may include a first AC power supply 10#1 and a second AC power supply 10#3 that supply AC power.

The plurality of power supplies 10 may further include a battery 10#2 storing a DC power supply.

Preferably, as shown in fig. 2 and 3, the plurality of power supplies 10 includes three power supplies 10#1 to #3 different from each other, and the three respective power supplies 10#1 to #3 different from each other may be the first alternating current power supply 10#1 supplying an AC power, the battery 10#2 storing a DC power, and the second alternating current power supply 10#3 supplying an AC power.

According to this, the supply device 100 can receive two or more ac power sources and one or more dc power sources.

The first ac power source 10#1 may be a grid power source G.

The first AC power source 10#1 may be a grid power source G supplying AC power of 440V.

The second ac power source 10#3 may be a bypass power source P.

The second AC power source 10#3 may be a bypass power source P supplying AC power of 440V.

The battery 10#2 may be an emergency battery that stores DC power and supplies the stored DC power in an emergency.

When an abnormality occurs in the first alternating-current power supply and the second alternating-current power supply, the battery 10#2 may supply the stored DC power to the supply device 100.

Therefore, in the case where the supply of the DC power to the second power conversion device 120 is interrupted, the plurality of power supplies 10 can supply the power stored in the battery 10#2 to the first power conversion device 110 while the supply of the DC power is resumed.

Here, the case where the supply of the DC power is interrupted may be one or more of a case where the supply of the first ac power source 10#1 and the second ac power source 10#3 is interrupted and a case where the operations of the plurality of first power conversion devices 110 receiving the power from the first ac power source 10#1 and the second ac power source 10#3 are interrupted.

After the interruption of the supply of the DC power, the battery 10#2 may supply the stored power to the first power conversion device 110 without interruption until the supply of the DC power is switched to resume.

The uninterrupted power supply means that the stored power is supplied to the first power conversion device 110 so that the power supply is not interrupted, i.e., power interruption does not occur.

Accordingly, the supply device 100 can achieve uninterrupted power supply to the load 20 by the battery 10#2, so that the power supply to the load 20 can be uninterrupted.

The plurality of first power conversion devices 110 may be a plurality.

The first power conversion device 110 may be a device that converts a received power source into a DC power source, for example, the first power conversion device 110 may be a converter.

The first power conversion device 110 may be an AC/DC converter that converts AC power to DC power, or a DC/DC converter that converts DC power to DC power.

The plurality of first power conversion devices 110 may include one or more of an AC/DC converter that converts an AC power source into a DC power source and a DC/DC converter that converts a level of the DC power source.

The plurality of first power conversion devices 110 may include first to third conversion devices 110#1 to 110#3, which are connected to the first ac power source 10#1, the battery 10#2, and the second ac power source 10#3, respectively, and receive power from the power supply connected thereto.

The plurality of first power conversion devices 110 may include three conversion devices 110#1 to 110#3 corresponding to the respective plurality of power supplies 10.

According to this, the first AC power source 10#1 may be connected to the first conversion device 110#1 and supply AC power to the first conversion device 110#1, the battery 10#2 may be connected to the second conversion device 110#2 and supply DC power to the second conversion device 110#2, and the second AC power source 10#3 may be connected to the third conversion device 110#3 and supply AC power to the third conversion device 110#3.

The first converting means 110#1 may be an AC/DC converting means converting AC power into DC power, the second converting means 110#2 may be a DC/DC converting means converting the level of DC power, and the third converting means 110#3 may be an AC/DC converting means converting AC power into DC power.

Each of the plurality of first power conversion devices 110 may include an opening and closing unit that is provided at front ends and rear ends of the plurality of first power conversion devices 110 to be opened and closed, respectively.

The switching unit may be a switch, and the switch is respectively disposed at the input end and the first output end of each of the plurality of first power conversion devices 110, and limits the power input/output to/from the plurality of first power conversion devices 110.

Here, the opening/closing means provided at the input terminal may be a circuit breaker that detects an overcurrent and opens a circuit.

In more detail, an AC air circuit breaker (ACB: air Circuit Breaker) may be provided at the input end of the first conversion device 110#1 and the third conversion device 110#3 receiving AC power from the first AC power source 10#1 and the second AC power source 10#3, and a DC wiring circuit breaker (MCCB: molded Circuit Breaker) may be provided at the input end of the second conversion device 110#2 receiving DC power from the battery 10#2

The opening/closing means may open and close the connection of the plurality of first power conversion devices 110 according to the operation of the plurality of first power conversion devices 110.

For example, if power is not received from the plurality of power sources 10, the switching units provided at the respective input terminals and the first output terminals are opened, whereby the connection of the corresponding first power conversion devices 110 can be disconnected.

The output terminals of the plurality of first power conversion devices 110 outputting the DC power may be divided into the first output terminal and the second output terminal.

That is, the output terminals of the plurality of first power conversion devices 110 may be divided into the first output terminal and the second output terminal, and the DC power sources may be output from the respective output terminals.

The first output terminal may connect the output terminals of each of the plurality of first power conversion devices 110 as one circuit.

Accordingly, the first output terminal may be a circuit that is commonly connected to the outputs of the respective plurality of first power conversion devices 110 and that flows the DC power output from the plurality of first power conversion devices 110.

The first output terminal may flow the DC power outputted from any one of the plurality of first power conversion devices 110.

The first output terminal may be connected to the input terminals of the bus bar 1 and the second power conversion device 120, and output the DC power to the bus bar 1 or the second power conversion device 120.

The second output may be an output of any one of the plurality of first power conversion devices 110 that is separate from the first output.

Therefore, the second output terminal may be a circuit that is not connected to the first output terminal and that flows the DC power output from any one of the plurality of first power conversion devices 110.

The second output terminal may be connected to the bus bar 1 and output the DC power to the bus bar 1.

Preferably, the second output may be an output of the third conversion device 110#3 corresponding to the third power supply 10#3.

According thereto, the second output may be an output of the third conversion device 110#3 receiving power from the bypass power source P as the third power source 10#3.

That is, the output of the DC power source of the third converting means 110#3 may be divided into two of the first output terminal and the second output terminal, the first output terminal is commonly connected with the first output terminals of the first converting means 110#1 and the second converting means 110#2, and the second output terminal may be separated from the first output terminal and independently output.

In this way, the first output terminal and the second output terminal outputting the DC power from the plurality of first power conversion devices 110 may be connected to the bus bar 1.

That is, the first output terminal may be connected to the input terminals of the bus bar 1 and the second power conversion device 120, and output the DC power to the bus bar 1 and the second power conversion device 120, respectively, and the second output terminal may be connected to the bus bar 1, and output the DC power to the bus bar 1.

The DC power converted and outputted at the plurality of first power conversion devices 110 may be transferred to the second power conversion device 120.

The plurality of first power conversion devices 110 may supply the DC power to the second power conversion device 120 by any one of the first through third conversion devices 110#1 through 110#3.

In the supply device 100, in the case where the power supply of the conversion devices 110#1 to #3 that supply the DC power to the second power conversion device 120 is interrupted, the plurality of first power conversion devices 110 may supply the DC power to the second power conversion device 120 through other conversion devices than the conversion devices 110#1 to # 3.

Here, the power supply interruption of the conversion devices 110#1 to #3 may be a case in which an abnormal state is detected at any one or more of the conversion devices 110#1 to #3, the power supply sources connected to the conversion devices 110#to #3, and the rated value of the DC power source.

For example, when the rated value of the DC power output from the first converter 110#1 decreases below a predetermined reference while the first converter 110#1 connected to the first ac power source 10#1 supplies the DC power to the second power converter 120, the second converter 110#3, which is another converter other than the first converter 110#1, may supply the DC power to the second power converter 120.

In this case, during the switching of the conversion devices 110#1 to 110#3 to the other conversion devices, the plurality of first power conversion devices 110 may supply the DC power to the second power conversion device 120 through the second conversion device 110#2 connected to the battery 10#2.

That is, when the supply of the DC power to the second power conversion device 120 is interrupted, the second power conversion device 110#2 connected to the battery 10#2 may supply the DC power to the second power conversion device 120 until the supply of the DC power is switched and restored.

The second power conversion device 120 may be plural.

The second power conversion device 120 is a device that converts the received DC power into the driving power, and for example, the second power conversion device 120 may be an inverter.

In the case where the load is a load driven by an AC power source, the second power conversion device 120 may be an inverter that converts DC power received from the first power conversion device 110 into a driving power source of AC.

In the case where the load is a load driven with a DC power source, the second power conversion device 120 may be an inverter that converts the DC power source received from the first power conversion device 110 into a driving power source of DC.

The number of the second power conversion devices 120 may correspond to the number of the loads 20.

The load 20 may be plural.

The second power conversion device 120 may include three or more inverters 120#1 to 120#3 corresponding to the load 20.

Each of the second power conversion devices 120 may be connected to each of the loads 20, and supply the driving power to the connected load.

The front end of each of the second power conversion devices 120 may be provided with an opening and closing unit that opens and closes the connection.

The switching means may be a switch provided at each input end of the second power conversion device 120 to limit the power input to the second power conversion device 120.

The driving power converted and outputted at the second power conversion device 120 may be transferred to each of the loads 20.

Here, the load 20 may include a motor msoad.

The first and second circuit breakers 130a and 130b may be DC circuit breakers that disconnect a DC power source.

In the first and second circuit breakers 130a and 130b, the first circuit breaker 130a may be disposed between the power source terminal to which the first output terminal of each of the plurality of first power conversion devices 110 is connected and the bus bar 1 connected to the power source terminal.

That is, the first circuit breaker 130a may be provided between the power source terminal of the supply device 100 and the bus bar 1, limiting the connection of the supply device 100 and the bus bar 1.

According to this, the supply device 100 is connected to the bus bar 1 through the power source terminal, and restricts connection with the bus bar 1 by opening and closing the first circuit breaker 130 a.

In the first circuit breaker 130a and the second circuit breaker 130b, the second circuit breaker 130b may be disposed between the second output terminal of any one of the plurality of first power conversion devices 110 and the bus bar 1 connected to the second output terminal.

That is, the second circuit breaker 130b may be provided between the second output end of the supply device 100 and the bus bar 1, limiting the connection of the supply device 100 and the bus bar 1.

According to this, the supply device 100 may be connected to the bus bar 1 through the second output terminal, and limit the connection with the bus bar 1 by opening and closing the second circuit breaker 130 b.

The bus 1 may be a DC bus for DC power flow.

The bus bar 1 may refer to a DC dedicated circuit in which a plurality of power supplies are commonly connected and which transfers power.

The bus bar 1 may be connected to a plurality of DC power supplies, and DC power supplied from the plurality of DC power supplies may be transferred to the bus bar 1.

For example, the transfer of DC power between the supply device 100 and other power supply devices may be achieved by connecting with other power supply devices than the supply device 100.

The bus bar 1 may be configured to have a rated value of a DC power supply supplied from at least one first power conversion device 110 to a DC power supply supplied from two first power conversion devices 110.

That is, the rated value of the bus bar 1 may be a rated value capable of receiving the transfer of the DC power supplied from the at least two first power conversion devices 110.

Preferably, the rated value of the bus bar 1 may be a size capable of transferring DC power between all power boards connected to the bus bar 1.

The bus bar 1 may flow the DC power according to the opening and closing of the first and second circuit breakers 130a and 130 b.

The bus bar 1 may turn on the DC power according to the opening/closing operations of the first and second circuit breakers 130a and 130 b.

The first circuit breaker 130a and the second circuit breaker 130b which are disposed between the power source terminal and the bus bar 1, the second output terminal and the bus bar 1 and restrict the connection of the power source terminal and the bus bar 1, the second output terminal and the bus bar 1 may be a DC dedicated wiring circuit breaker (MCCB).

The first circuit breaker 130a and the second circuit breaker 130b may limit the connection of the bus bar 1.

The first circuit breaker 130a may change an opening and closing according to a state of at least one of the DC power source, the driving power source, the plurality of first power conversion devices 110, and the load 20, and connect or limit the DC power source between the power source terminal and the bus bar 1.

The second circuit breaker 130b may change an opening and closing according to a state of at least one of the DC power source, the driving power source, the plurality of first power conversion devices 110, and the load 20, and connect or limit the DC power source between the second output terminal and the bus bar 1.

Here, the at least one state may be at least one of a case where the DC power supply is changed from an initial state, a case where the driving power supply is changed from an initial state, a case where the operation states of the plurality of first power conversion devices 110 are changed, and a case where the driving state of the load 20 is changed.

For example, the at least one state may be a case where the DC power supply or the driving power supply is equal to or lower than a reference rated value, a case where an operation state is changed due to a failure or an accident of the plurality of first power conversion devices 110, or a case where a driving state of the load 20 is changed due to a decrease in the driving power supply supplied to the load 20.

The first circuit breaker 130a and the second circuit breaker 130b may limit the connection of the power source terminal and the bus bar 1, and the second output terminal and the bus bar 1 by being opened at ordinary times and closed at the time of operation.

That is, the first circuit breaker 130a may open the power source terminal and the bus bar 1 at ordinary times and connect the power source terminal and the bus bar 1 by closing the circuit at the time of operation, and the second circuit breaker 130b may open the second output terminal and the bus bar 1 at ordinary times and connect the second output terminal and the bus bar 1 by closing the circuit at the time of operation.

The first circuit breaker 130a may be closed when the DC power is connected between the power source terminal and the bus bar 1, and may be opened when the DC power is limited between the power source terminal and the bus bar 1.

In the case where the power supply to the plurality of first power conversion devices 110 is interrupted, the first circuit breaker 130a may be closed to connect the power source terminal and the bus bar 1, thereby conducting the DC power from the bus bar 1 to the power source terminal and further supplying the DC power to the power source terminal.

In the case where the power supply to the conversion devices 110#1, 110#3 connected to the first ac power source 10#1 and the second ac power source 10#3 is interrupted, the first circuit breaker 130a may be closed to connect the power source terminal and the bus bar 1, thereby conducting the DC power from the bus bar 1 to the power source terminal and further supplying the DC power to the second power conversion device 120.

In this case, after the power supply of the conversion devices 110#1, 110#3 connected to the first ac power source 10#1, the second ac power source 10#3 is interrupted, the conversion device 110#2 connected to the battery 10#2 may supply the DC power to the second power conversion device 120 until the DC power turned on from the bus bar 1 is supplied to the second power conversion device 120.

That is, the conversion device 110#2 connected to the battery 10#2 may maintain the supply of the DC power to the second power conversion device 120 until the supply of the DC power to the second power conversion device 120 is switched and restored.

The first circuit breaker 130a may be closed only in the case where the second circuit breaker 130b is opened.

That is, the first circuit breaker 130a may be closed only in a case where the second circuit breaker 130b is opened to connect the power source terminal and the bus bar 1, thereby conducting the DC power from the bus bar 1 to the power source terminal.

The second circuit breaker 130b may be closed when the DC power is connected between the second output terminal and the bus bar 1, and may be opened when the DC power is limited between the second output terminal and the bus bar 1.

In case of interruption of power supply to other power supply devices connected to the bus bar 1, the second circuit breaker 130b may be closed to connect the second output terminal and the bus bar 1, thereby conducting the DC power from the second output terminal to the bus bar 1, thereby supplying the DC power to the other power supply devices.

The second circuit breaker 130b may be closed only in a case where the switching unit of the switching device 110#3 connected to the second circuit breaker 130b and the first circuit breaker 130a are opened.

That is, the second circuit breaker 130b may be closed to connect the second output terminal and the bus bar 1 only in a case where the switching unit of the switching device 110#3 connected to the second circuit breaker 130b and the first circuit breaker 130a are opened, thereby conducting the DC power from the second output terminal to the bus bar 1.

As described above, the supply apparatus 100 including the plurality of first power conversion apparatuses 110, the second power conversion apparatuses 120, and the first circuit breaker 130a, the second circuit breaker 130b may further include a control part 140, and the control part 140 may control the plurality of first power conversion apparatuses 110, the second power conversion apparatuses 120, and the first circuit breaker 130a, the second circuit breaker 130b, and monitor an abnormal state of at least one of the plurality of power supplies 10, the plurality of first power conversion apparatuses 110, the DC power supply, the driving power supply, and the load, and control the first circuit breaker 130a, the second circuit breaker 130b to connect the power source terminal or the output terminal with the bus bar 1 according to the monitoring result.

The control unit 140 may be a central control unit of the supply device 100.

The control part 140 may include a plurality of control units for controlling the supply device 100.

In addition, the control part 140 may further include a plurality of electronic devices for performing the functions of the supply device 100.

For example, the control part 140 may include at least one of a storage unit storing software/applications/programs for function execution and control of the supply device 100, a dedicated control unit including the storage unit, a communication unit, a display unit, and an input unit.

The control unit 140 may control the plurality of first power conversion devices 110, the second power conversion device 120, and the first circuit breaker 130a, the second circuit breaker 130b.

The control part 140 may include a programmable logic controller (PLC: programmable Logic Controller) that controls the plurality of first power conversion devices 110, the second power conversion device 120, and the first and second circuit breakers 130a, 130 b.

The control unit 140 may monitor states of the plurality of first power conversion devices 110, the second power conversion devices 120, and the first and second circuit breakers 130a, 130b, and may control operations of the plurality of first power conversion devices 110, the second power conversion devices 120, and the first and second circuit breakers 130a, 130b according to the monitored results.

The control unit 140 may control the operations of the plurality of first power conversion devices 110, the second power conversion devices 120, and the first and second circuit breakers 130a, 130b according to the states of the plurality of power supplies 10 and the load 20.

The control unit 140 may control the conversion and supply of the DC power by controlling the respective operations of the plurality of first power conversion devices 110.

For example, the control unit 140 may control the operation of the control target conversion device among the plurality of first power conversion devices 110 so as to convert the DC power by the control target conversion device and supply the DC power to the second power conversion device 120.

The control unit 140 may also control opening and closing of the opening and closing means included in the plurality of first power conversion devices 110.

The control unit 140 may control the switching and supply of the driving power by controlling the operation of the second power conversion device 120.

For example, the control unit 140 may control the operation of the control target conversion device of the second power conversion device 120 so as to convert the control target conversion device and supply the driving power to the load 20.

The control unit 140 may also control the opening and closing of the opening and closing means included in the second power conversion device 120.

The control unit 140 may control the reception and supply of the DC power by controlling the operations of the first and second circuit breakers 130a and 130 b.

For example, the control part 140 may control to receive the DC power from the bus bar 1 by closing the first circuit breaker 130a or supply the DC power to the bus bar 1 by closing the second circuit breaker 130 b.

In this case, the control unit 140 may control the first circuit breaker 130a and the second circuit breaker 130b in an Inter-lock (Inter-lock) manner.

For example, the second circuit breaker 130b may be opened in a case where the first circuit breaker 130a is closed to receive the DC power from the bus bar 1, and the first circuit breaker 130a may be opened in a case where the second circuit breaker 130a is closed to supply the DC power to the bus bar 1.

The control unit 140 may communicate with any one or more of an external communication device and a control device, and may control the operations of the plurality of first power conversion devices 110, the plurality of second power conversion devices 120, the plurality of first circuit breakers 130a, and the plurality of second circuit breakers 130b based on the communication result.

For example, the control unit 140 may receive a control instruction for controlling the operation of any one or more of the plurality of first power conversion devices 110, the second power conversion devices 120, and the first circuit breaker 130a, and the second circuit breaker 130b from the control device, and may control the operation of any one or more of the plurality of first power conversion devices 110, the second power conversion devices 120, and the first circuit breaker 130a, and the second circuit breaker 130b based on the control instruction.

The control part 140 may control to receive power from any one of the plurality of power sources 10 and convert it into the DC power.

That is, the control unit 140 may control to selectively receive power from any one of the plurality of power sources 10.

The control unit 140 may be controlled to receive power from any one of the plurality of power sources 10 according to a preset supply reference and convert the power into the DC power.

The supply reference may be a reference for the supply priority order of the plurality of power supplies 10.

For example, the first ac power source 10#1, the second ac power source 10#3, and the battery 10#3 may be set in this order.

In the case where the supply reference is as described above, the control section 140 may control to supply power in the order of the first ac power source 10#1, the second ac power source 10#3, and the battery 10#3.

The control unit 140 may control the operation of the first conversion device 110#1 connected to the first ac power supply 10#1 when power is received from the first ac power supply 10#1.

In this case, the control unit 140 may connect the first conversion device 110#1 and disconnect the second conversion device 110#2 and the third conversion device 110#3 by closing the opening/closing unit of the first conversion device 110#1 and opening the opening/closing unit of the second conversion device 110#2 and the third conversion device 110#3.

When receiving power from the second ac power source 10#3, the control unit 140 may control the operation of the third conversion device 110#3 connected to the second ac power source 10#3.

In this case, the control unit 140 may turn off the first switching device 110#1 and the second switching device 110#2 by closing the opening/closing unit of the third switching device 110#3 and opening the opening/closing unit of the first switching device 110#1 and the second switching device 110#2, and thereby connecting only the third switching device 110#3.

The control unit 140 may control the operation of the second switching device 110#2 connected to the battery 10#2 when receiving power from the battery 10#2.

In this case, the control unit 140 may turn off the first conversion device 110#1 and the third conversion device 110#3 by closing the opening/closing unit of the second conversion device 110#2 and opening the opening/closing unit of the first conversion device 110#1 and the third conversion device 110#3, and by connecting only the second conversion device 110#2.

The control unit 140 is controlled to select any one of the plurality of first power conversion devices 110 according to the state of the plurality of power supplies 10, and to transmit the DC power to the second power conversion device 120 by the selected conversion device 110.

That is, the control part 140 may control to convert and transfer the DC power to the second power conversion device 120 by the selected one of the plurality of first power conversion devices 110.

For example, when an abnormality occurs in the first ac power source 10#1 and the second ac power source 10#3 among the plurality of power sources 10, the control section 140 may control to select the second conversion device 110#2 connected to the battery 10#2, and cause the second conversion device 110#2 to receive power from the battery 10#2 and convert it into the DC power, and transmit the DC power to the respective second power conversion devices 120.

When an abnormality occurs in any one or more of the conversion device 110 that is transmitting the DC power to the second power conversion device 120 and the power supply 10 corresponding to the conversion device 110, the control unit 140 may control the other conversion devices 110 than the conversion device 110 to transmit the DC power to the second power conversion device 120.

When an abnormality occurs in any one or more of the conversion device 110 that is transmitting the DC power to the second power conversion device 120 and the power supply 10 corresponding to the conversion device 110, the control unit 140 may switch the power supply 10 and the first power conversion device 110 in the power supply to transmit the DC power to the second power conversion device 120 by the other first power conversion devices 110 except the conversion device 110.

For example, when the first conversion device 110#1 fails or the first ac power source 10#1 is turned off while receiving power from the first ac power source 10#1 and converting the DC power with the first conversion device 110#1, the first ac power source 10#1 in power supply may be switched to the second ac power source 10#3, the first conversion device 110#1 may be switched to the third conversion device 110#3, such that power is received from the second ac power source 10#3, and the DC power is converted by the third conversion device 110#3 and transferred to the second power conversion device 120.

In this case, the control unit 130 may control the battery 10#2 to receive power while the first ac power source 10#1 is switched to the second ac power source 10#3 and the first conversion device 110#1 is switched to the third conversion device 110#3, convert the DC power by the second conversion device 110#2, and transmit the DC power to the second power conversion device 120.

As described above, the control unit 140 that controls the plurality of first power conversion devices 110, the plurality of second power conversion devices 120, and the plurality of first circuit breakers 130a and the plurality of second circuit breakers 130b controls the opening and closing of the plurality of first circuit breakers 130a and the plurality of second circuit breakers 130b according to the state of the DC power supply or the driving power supply, and further controls the reception and supply of the DC power supply by the bus 1.

For example, in the case where the size of the driving power is smaller than the required size of the load 20 or the DC power is insufficient, it may be controlled to close the first circuit breaker 130a and open the second circuit breaker 130b, whereby the DC power may be received from the bus bar 1.

Or in case that the size of the driving power is larger than the required size of the plurality of loads 20 or the DC power is sufficient, the second circuit breaker 130b may be controlled to be closed, whereby the DC power may be supplied to the bus bar 1.

In contrast, when a fault occurs in the plurality of first power conversion devices 110 or the second power conversion devices 120 to cause a fault current to flow in the power source side, or an abnormality occurs in the plurality of power sources 10 or the plurality of loads 20 to cause the fault current to flow in the power source side, the fault current can be prevented from being supplied to the bus bar 1 by opening the first circuit breaker 130a and the second circuit breaker 130 b.

When an abnormality occurs in the plurality of power supplies 10, the control part 140 may control to close the first circuit breaker 130a, whereby the DC power may be received through the bus bar 1 from other power supply devices connected to the bus bar 1.

When an abnormality occurs in the plurality of power supplies 10, the control part 140 may control to disconnect the plurality of power supplies 10 and the plurality of first power conversion devices 110, close the first circuit breaker 130a, and open the second circuit breaker 130b, thereby receiving the DC power from other power supply devices connected to the bus bar 1 through the bus bar 1.

For example, when an abnormality occurs in the first ac power source 10#1 and the second ac power source 10#3 among the plurality of power sources 10, the control section 140 may control to close the first circuit breaker 130a to connect the power source terminal with the bus bar 1, whereby the DC power may be received through the bus bar 1 from other power supply devices connected to the bus bar 1.

In this way, the power source terminal may receive the DC power through the bus bar 1, and the first circuit breaker 130a may limit the supply of the DC power from the other power supply device to the supply device 100 by opening and closing the connection of the power source terminal, which enables the reception of the DC power, and the bus bar 1.

When an abnormality occurs in other power supply devices connected to the bus bar 1, the control part 140 may control to close the second circuit breaker 130b, thereby supplying DC power to the other power supply devices through the bus bar 1.

When an abnormality occurs in other power supply devices connected to the bus bar 1, the control part 140 may control to receive power from any one of the plurality of power supply devices 10 and open the first circuit breaker 130a and close the second circuit breaker 130b, thereby supplying the DC power output from the second output terminal to the other power supply devices through the bus bar 1.

For example, when an abnormality occurs in the other power supply device while receiving power from the first ac power source 10#1 of the plurality of power supplies 10, the control section 140 may control to connect the second output terminal and the bus bar 1 by closing the second circuit breaker 130b and supply the DC power converted at the third conversion device 110#3 to the other power supply device connected to the bus bar 1 through the bus bar 1 by controlling the third conversion device 110#3 that outputs the DC power to the second output terminal.

In this way, the second output terminal supplies the DC power to the bus bar 1, and the second circuit breaker 130b can limit the supply of the DC power from the supply device 100 to the other power supply device by opening and closing the connection between the second output terminal, which realizes the supply of the DC power, and the bus bar 1.

As shown in fig. 1, according to the preferred embodiment of the above-described supply device 100, it may include: a plurality of first power conversion devices 110 converting power received from each of the plurality of power supplies 10 into DC power; a second power conversion device 120 that converts the DC power supply into a driving power supply for driving the plurality of loads 20, and supplies the driving power supply to the plurality of loads 20; a first circuit breaker 130a provided between a first output terminal to which outputs of the plurality of first power conversion devices 110 are commonly connected and a bus bar 1 connected to the first output terminal, and limiting connection of the first output terminal and the bus bar 1; a second circuit breaker 130b provided between a second output terminal, which is an output of any one of the plurality of first power conversion devices 110, and the bus bar 1 connected to the second output terminal, and limiting connection between the second output terminal and the bus bar 1; and a control unit 140 that controls the opening and closing of each of the first and second circuit breakers 130a, 130b according to the state of the DC power supply or the driving power supply, and further controls the reception and supply of the DC power supply by the bus 1.

As described above, the supply device 100 that receives/supplies the DC power by being connected to the bus bar 1 may be included in a power supply system as shown in fig. 4, and receives/supplies the DC power by being connected to the bus bar 1.

Next, the power supply system of the present invention will be described, and the contents overlapping those described above will be omitted as much as possible.

In addition, in addition to fig. 1 to 3 referred to in the description of the supply device 100, the description is additionally referred to fig. 4 to 8 shown in accordance with the embodiment of the power supply system, and reference numerals without reference numerals in fig. 4 to 8 are replaced with reference numerals shown in fig. 1 to 3 and described.

The embodiments of the power supply system described below may be implemented independently or may be implemented in combination with the embodiments of the supply device 100 described above.

The power supply system may be implemented in a combination of the above-described embodiment and the following embodiment or in a different form.

The power supply system may be a power supply system including a plurality of power supply devices.

The power supply system may be a system that includes a plurality of packaged power supply devices to supply power.

Here, the power supply device may be a power panel in which a plurality of power supply control devices are packaged.

The power supply system may include a plurality of the supply devices 100 described hereinabove.

That is, the supply device 100 may be implemented by being applied to the power supply system, which may be implemented by including a plurality of the supply devices 100.

As shown in fig. 4, the power supply system 1000 (hereinafter, referred to as a system) includes: a plurality of power boards 100, 200, 300, 400 for converting power received from each of the plurality of power sources 10 into DC power, converting the DC power into driving power for the load 20, and supplying the load 20 with the DC power; a bus bar 1 to which a power source terminal, which inputs the DC power source in each of the plurality of power source boards 100, 200, 300, 400, and a second output terminal, which is separated from the power source terminal and outputs the DC power source, are connected, to the bus bar 1, to turn on the DC power source converted in the plurality of power source boards 100, 200, 300, 400; a plurality of first circuit breakers 130a, 230a, 330a, 430a arranged between the respective power source terminals and the bus bar 1; and a plurality of second circuit breakers 130b, 230b, 330b, 430b arranged between the respective second output terminals and the bus bar 1.

In the system 1000, the plurality of first circuit breakers 130a, 230a, 330a, 430a change opening and closing according to an operation state of one or more of the plurality of power boards 100, 200, 300, 400, thereby connecting or limiting the DC power between the power source terminal and the bus bar 1.

In the system 1000, the plurality of second circuit breakers 130b, 230b, 330b, 430b change opening and closing according to an operation state of one or more of the plurality of power boards 100, 200, 300, 400, thereby connecting or limiting the DC power between the second output terminal and the bus bar 1.

Here, each of the plurality of power boards 100, 200, 300, 400 may be the power supply device 100 as shown in fig. 1 to 3.

As shown in fig. 1 to 3, each of the plurality of power boards 100, 200, 300, 400 may include: a plurality of first power conversion devices 110, 210, 310, 410 converting power received from the plurality of power sources 10 into the DC power; one or more second power conversion devices 120, 220, 320, 420 that convert the DC power received from the plurality of first power conversion devices 110, 210, 310, 410 into the driving power and supply the driving power to the load 20; and the first circuit breaker 130a, 230a, 330a, 430a, the second circuit breaker 130b, 230b, 330b, 430b.

Each of the plurality of power boards 100, 200, 300, 400 may also be implemented by a different configuration from the power supply device 100 shown in fig. 1 to 3.

The system 1000 may include a plurality of the plurality of power boards 100, 200, 300, 400, and the plurality of power boards 100, 200, 300, 400 may be commonly connected to one bus bar 1.

The plurality of power boards 100, 200, 300, 400 may be plural, as shown in fig. 4, and may be four or more.

Preferably, the plurality of power boards 100, 200, 300, 400 may be five or more.

Each of the plurality of power boards 100, 200, 300, 400 may receive power from each of the plurality of power sources 10 and convert the power into the DC power, and convert the DC power into the driving power, and supply the driving power to the load 20.

As shown in fig. 2 and 3, the plurality of power supplies 10 may include a first alternating current power supply 10#1 and a second alternating current power supply 10#3 supplying AC power and a battery power supply 10#2 storing DC power.

Here, the first AC power source 10#1 may be a main grid power source G supplying AC power, the second AC power source 10#3 may be a bypass system power source P supplying AC power, and the battery power source 10#2 may be a battery power source B supplying DC power.

That is, as shown in fig. 4, the plurality of power supplies 10 may include a grid power supply G, a bypass power supply P, and a battery power supply B.

Accordingly, each of the plurality of power strips 100, 200, 300, 400 may receive power from each of the grid power source G, the bypass power source P, and the battery power source B.

The battery power source B stores the DC power source, and in the event of interruption of the power supply of the first ac power source 10#1 and the second ac power source 10#3, the DC power source stored in the battery power source B may be supplied to the plurality of power strips 100, 200, 300, 400 until the power supply is switched to be restored.

After the power supply interruption, the battery power supply B may supply the stored power to the plurality of power boards 100, 200, 300, 400 without interruption until the power supply is switched to be restored.

The plurality of power supplies 10 may further include an emergency power supply a for supplying emergency power to the load 20 when the power supply of the first ac power supply G, the second ac power supply P, and the battery power supply B is interrupted.

When an abnormality occurs in the first ac power source G, the second ac power source P, and the battery power source B, the emergency power source a may supply emergency power to the load 20.

The emergency power supply a may be a power supply that maintains the driving of the load 20 for a predetermined period of time by supplying the emergency power to the load 20 when the power supply fails due to an abnormality in each of the first ac power supply G, the second ac power supply P, and the battery power supply B that supply power to the plurality of power panels 100, 200, 300, and 400.

For example, the emergency power supply a may be a power supply including an emergency generator.

Preferably, as shown in fig. 4, each of the plurality of power boards 100, 200, 300, 400 may receive power from three power sources 10, that is, the grid power source G, the bypass power source P, and the battery power source B, and may receive power from the emergency power source a only when the grid power source G, the bypass power source P, and the battery power source B cannot supply power.

Here, as for each of the plurality of power supply sources 10 that supply power to each of the plurality of power boards 100, 200, 300, 400, each of the plurality of power boards 100, 200, 300, 400 may be supplied with power from one power grid, or each of the plurality of power boards 100, 200, 300, 400 may be supplied with power from a separate power board through a separate power board.

As shown in fig. 1 to 3, each of the plurality of power boards 100, 200, 300, 400 may include: a plurality of first power conversion devices 110, 210, 310, 410 converting power received from the plurality of power sources 10 into the DC power; one or more second power conversion devices 120, 220, 320, 420 that convert the DC power received from the plurality of first power conversion devices 110, 210, 310, 410 into the driving power and supply the driving power to the load 20; the first circuit breaker 130a, 230a, 330a, 430a and the second circuit breaker 130b, 230b, 330b, 430b; and the control part 140, 240, 340, 440.

Each of the plurality of power boards 100, 200, 300, 400 may receive power from each of the plurality of power sources 10, convert the received power into the DC power through the plurality of first power conversion devices 110, 210, 310, 410, convert the DC power into the driving power through the second power conversion devices 120, 220, 320, 420, and supply the driving power to the load 20.

The plurality of power boards 100, 200, 300, 400 may supply the DC power to the second power conversion device 120, 220, 320, 420 with any one of the plurality of first power conversion devices 110, 210, 310, 410 according to the state of the plurality of power supplies 10.

In the case where the power supply of the conversion device 110, 210, 310, 410 that supplies the DC power to the second power conversion device 120, 220, 320, 420 is interrupted, the plurality of power boards 100, 200, 300, 400 may supply the DC power to the second power conversion device 120, 220, 320, 420 through other conversion devices than the conversion device 110, 210, 310, 410.

In this case, the plurality of first power conversion devices 110, 210, 310, 410 may supply the DC power to the second power conversion devices 120, 220, 320, 420 by the conversion device 110#2, 210#2, 310#2, 410#2 receiving power from the battery power source B during the period in which the conversion device is switched to the other conversion device.

Preferably, each of the plurality of power boards 100, 200, 300, 400 may include three conversion devices connected to each of the plurality of power sources 10.

Each of the plurality of first power conversion devices 110, 210, 310, 410 included in each of the plurality of power boards 100, 200, 300, 400 may distinguish the first output terminal from the second output terminal and output the DC power respectively.

The first output terminal may be connected to the power supply terminal.

The power source terminal may flow the DC power outputted from any one of the plurality of first power conversion devices 110, 210, 310, 410.

The power supply terminal may be connected to the bus bar 1 and the input terminal of each of the second power conversion devices 120, 220, 320, 420, and transmit the DC power to the second power conversion devices 120, 220, 320, 420.

The second output may be an output of any one of the plurality of first power conversion devices 110, 210, 310, 410 that is separate from the first output.

Thus, the second output terminal may be a circuit that is not connected to the first output terminal and that flows the DC power output from any one of the plurality of first power conversion devices 110, 210, 310, 410.

The second output may be connected to the busbar 1 and deliver the DC power to the busbar 1.

Preferably, the second output may be an output of the third switching device 110#3, 210#3, 310#3, 410#3 corresponding to the third power supply 10#3.

According to this, the second output may be an output of the third switching device 110#3, 210#3, 310#3, 410#3 receiving power from the bypass power source P as the third power source 10#3.

That is, the output of the DC power source of each of the third conversion devices 110#3, 210#3, 310#3, 410#3 included in each of the plurality of power boards 100, 200, 300, 400 may be divided into two of the first output terminal and the second output terminal, and the first output terminal may be commonly connected to the power source terminal with the first output terminals of the first conversion devices 110#1, 210#1, 310#1 and the second conversion devices 110#2, 210#2, 310#2, 410#2, and the second output terminal may be separately and independently output from the first output terminal.

As such, the first output terminal and the second output terminal outputting the DC power from the plurality of first power conversion devices 110, 210, 310, 410 may be connected to the bus bar 1.

That is, the first output terminal may be connected to the input terminals of the bus bar 1 and the second power conversion device 120, 220, 320, 420 and transmit the DC power to the second power conversion device 120, 220, 320, 420, and the second output terminal may be connected to the bus bar 1 and transmit the DC power to the bus bar 1.

The DC power converted at each of the plurality of first power conversion devices 110, 210, 310, 410 may be transferred to each of the second power conversion devices 120, 220, 320, 420 through each of the first output terminals.

Preferably, as shown in fig. 4, each of the plurality of power boards 100, 200, 300, 400 may include three second power conversion devices 120, 220, 320, 420, and the driving power is supplied to the three loads 20 through the three second power conversion devices 120, 220, 320, 420, respectively.

Here, the load 20 may be a motor M load.

Preferably, as shown in fig. 4, each of the plurality of power boards 100, 200, 300, 400 may include the plurality of first circuit breakers 130a, 230a, 330a, 430a, respectively, and the plurality of first circuit breakers 130a, 230a, 330a, 430a may be disposed on circuits connected to the power source terminal connected to the first output terminal of each of the plurality of first power conversion apparatuses 110, 210, 310, 410 and the bus bar 1, respectively, to limit connection between the power source terminal and the bus bar 1.

Accordingly, the respective power supply terminals of the respective plural power boards 100, 200, 300, 400 may be commonly connected to the bus bar 1.

Further, as shown in fig. 4, each of the plurality of power boards 100, 200, 300, 400 may include the second circuit breaker 130b, 230b, 330b, 430b, and the second circuit breaker 130b, 230b, 330b, 430b may be provided on a circuit to which the second output terminal of any one of the plurality of first power conversion devices 110, 210, 310, 410 is connected to the bus bar 1, respectively, to limit connection between the second output terminal and the bus bar 1.

Accordingly, the second output terminals of the respective plural power boards 100, 200, 300, 400 may be commonly connected to the bus bar 1.

Each of the first and second circuit breakers 130, 230, 330, 430 is a DC circuit breaker that disconnects a DC power source, and may be provided on a circuit between the power source terminal and the bus bar 1, the second output terminal, and the bus bar 1.

Each of the first and second circuit breakers 130, 230, 330, 430 may limit the connection of the power source terminal and the bus bar 1, the second output terminal and the bus bar 1 by being opened at ordinary times and closed at the time of operation.

Accordingly, each of the plurality of power boards 100, 200, 300, 400 may be connected to the bus bar 1 by opening and closing each of the first and second circuit breakers 130, 230, 330, 430.

The plurality of first circuit breakers 130a, 230a, 330a, 430a may be disposed between the power source terminal of each of the plurality of first power conversion apparatuses 110, 210, 310, 410 and the bus bar 1 connected to the power source terminal.

That is, the plurality of first circuit breakers 130a, 230a, 330a, 430a may be disposed between the power source end of the plurality of power source boards 100, 200, 300, 400 and the bus bar 1, and limit the connection of the plurality of power source boards 100, 200, 300, 400 and the bus bar 1.

According to this, the plurality of power boards 100, 200, 300, 400 may be connected to the bus bar through the power source terminal, and limit the connection with the bus bar 1 by the opening and closing of the plurality of first circuit breakers 130a, 230a, 330a, 430 a.

The plurality of second circuit breakers 130b, 230b, 330b, 430b may be disposed between the second output terminal of each of the plurality of power boards 100, 200, 300, 400 and the bus bar 1 connected to the second output terminal.

That is, the plurality of second circuit breakers 130b, 230b, 330b, 430b may be disposed between the second output terminals of the plurality of power boards 100, 200, 300, 400 and the bus bar 1, and limit the connection of the plurality of power boards 100, 200, 300, 400 and the bus bar 1.

According to this, the plurality of power boards 100, 200, 300, 400 may be connected to the bus bar 1 through the second output terminal, and the connection with the bus bar 1 is restricted by the opening and closing of the plurality of second circuit breakers 130b, 230b, 330b, 430 b.

The bus bar 1 is a DC bus bar that flows a DC power supply, which can flow the DC power supply through a connection with the power source end or the second output end of each of the plurality of power source boards 100, 200, 300, 400.

That is, the DC power may flow through the bus bar 1 according to the opening and closing of the first and second circuit breakers 130, 230, 330, 430.

The plurality of first circuit breakers 130a, 230a, 330a, 430a may be closed when the DC power is connected between the power source terminal and the bus bar 1, and may be opened when the DC power is limited between the power source terminal and the bus bar 1.

The plurality of second circuit breakers 130b, 230b, 330b, 430b may be closed when the DC power is connected between the second output terminal and the bus bar 1, and may be opened when the DC power is limited between the second output terminal and the bus bar 1.

In case that one or more of the plurality of power boards 100, 200, 300, 400 is interrupted, the plurality of first and second circuit breakers 130, 230, 330, 430 may close the first circuit breakers 130a, 230a, 330a, 430a of the power board interrupted by power and the second circuit breakers 130b, 230b, 330b, 430b of the power board adjacent to the power board interrupted by power, connect the power board interrupted by power and the adjacent power board to the bus bar, and further supply the DC power from the adjacent power board to the power board interrupted by power.

In this case, after the power interruption, the power supply board of the power interruption may receive the DC power from the conversion device 110#2, 210#2, 310#2, 410#2 connected to the battery power B until the supply of the DC power conducted from the adjacent power supply board is obtained.

Here, the adjacent power strip may be a power strip adjacent to the power strip in which the power supply is interrupted and the switching device 110#3, 210#3, 310#3, 410#3 outputting the DC power to the second output terminal is not operated.

That is, the adjacent power supply board may not be the power supply board that is receiving power from the second ac power source 10#3.

Accordingly, the adjacent power strip may supply the DC power to the power strip whose power supply is interrupted using the third conversion device 110#3, 210#3, 310#3, 410#3 which corresponds to the second output terminal and receives power from the second ac power source 10#3 and converts it into the DC power.

Each of the plurality of power boards 100, 200, 300, 400 may monitor actions of the plurality of first power conversion devices 110, 210, 310, 410 and the second power conversion devices 120, 220, 320, 420, which are each included.

Each of the plurality of power boards 100, 200, 300, 400 may control opening and closing of each of the plurality of circuit breakers 130, 230, 330, 430 according to a result of monitoring actions of the plurality of first power conversion devices 110, 210, 310, 410 and the second power conversion devices 120, 220, 320, 420, which are each included.

Each of the plurality of power boards 100, 200, 300, 400 may monitor the operations of the plurality of first power conversion devices 110, 210, 310, 410 and the second power conversion devices 120, 220, 320, 420, which are respectively included, and detect the states of the DC power source and the driving power source.

Each of the plurality of power boards 100, 200, 300, 400 may receive power from any one of the plurality of power sources 10 and convert to the DC power.

That is, each of the plurality of power boards 100, 200, 300, 400 may selectively receive power from any one of the plurality of power sources 10.

Each of the plurality of power boards 100, 200, 300, 400 may receive power from any one of the plurality of power sources 10 and convert it into the DC power according to a preset supply reference.

The supply reference may be a reference for a preferred order of power supply to the plurality of power supplies 10.

The plurality of power boards 100, 200, 300, 400 may select any one of the plurality of first power conversion devices 110, 210, 310, 410 according to the state of the plurality of power sources 10, and transfer the DC power to the respective second power conversion devices 120, 220, 320, 420 using the selected first power conversion device.

That is, each of the plurality of power boards 100, 200, 300, 400 may transfer the DC power to the second power conversion device 120, 220, 320, 420, respectively, with one first power conversion device selected according to the state of the plurality of power supplies 10.

When an abnormality occurs in one or more of the conversion device that is transmitting the DC power to the second power conversion device 120, 220, 320, 420 and the power supply 10 corresponding to the conversion device, the plurality of power strips 100, 200, 300, 400 may transmit the DC power to the second power conversion device 120, 220, 320, 420 through other conversion devices than the conversion device.

That is, when an abnormality occurs in one or more of the conversion device that is transmitting the DC power and the power supply 10 corresponding to the conversion device, each of the plurality of power boards 100, 200, 300, 400 may be switched to another conversion device other than the conversion device, and the DC power may be transmitted to the second power conversion device 120, 220, 320, 420 by the switched device.

When an abnormality occurs in one or more of the conversion device that is transmitting the DC power to the second power conversion device 120, 220, 320, 420 and the power supply source 10 corresponding to the conversion device, the plurality of power strips 100, 200, 300, 400 may switch the power supply source and the conversion device that are supplying power so that the other conversion device than the conversion device transmits the DC power to the second power conversion device 120, 220, 320, 420.

The system 1000 as described above may further include a control device 600, the control device 600 monitoring a state of at least one of the plurality of power boards 100, 200, 300, 400 and the plurality of first and second circuit breakers 130, 230, 330, 430, and controlling at least one of the plurality of power boards 100, 200, 300, 400 and the plurality of first and second circuit breakers 130, 230, 330, 430 according to a monitoring result.

As described above, the plurality of power boards 100, 200, 300, 400, which convert and supply the DC power, may be controlled by the control device 600.

Each of the plurality of power boards 100, 200, 300, 400 may communicate with the control device 600 and operate according to a result of the communication with the control device 600.

For example, the plurality of power boards 100, 200, 300, 400 may receive a control instruction from the control device 600, and perform an operation according to the control instruction or transmit status information to the control device 600.

Each of the plurality of power boards 100, 200, 300, 400 may transmit a result of monitoring the actions of the plurality of first power conversion devices 110, 210, 310, 410 and the second power conversion devices 120, 220, 320, 420, which are each included, to the control device 600.

The control device 600 may communicate with each of the plurality of power boards 100, 200, 300, 400 and control each of the plurality of power boards 100, 200, 300, 400 according to status information received from each of the plurality of power boards 100, 200, 300, 400.

For example, the control device 600 may control switching and supply of the DC power, switching and supply of the driving power, and switching and supply of the driving power, of the respective plurality of power boards 100, 200, 300, 400, according to the state information of the DC power and the driving power received from the respective plurality of power boards 100, 200, 300, 400.

The control device 600 may control switching and supply of the driving power of each of the plurality of power boards 100, 200, 300, 400 or the plurality of first and second circuit breakers 130, 230, 330, 430 included in each of the plurality of power boards 100, 200, 300, 400 by communicating with each of the plurality of power boards 100, 200, 300, 400 and according to status information received from each of the plurality of power boards 100, 200, 300, 400.

In addition, the control device 600 may detect states of the plurality of power sources 10 and the load 20 or receive information on the states of the plurality of power sources 10 and the load 20 from an external communication unit and control switching and supply of the driving power of each of the plurality of power source boards 100, 200, 300, 400 or the plurality of first and second circuit breakers 130, 230, 330, 430 included in each of the plurality of power source boards 100, 200, 300, 400 according to the states of the plurality of power sources 10 and the load 20.

In this case, the control device 600 may transmit a control instruction for switching and supplying the driving power to each of the plurality of power boards 100, 200, 300, 400 or controlling the first and second circuit breakers 130, 230, 330, 430 included in each of the plurality of power boards 100, 200, 300, 400 to each of the plurality of power boards 100, 200, 300, 400, and implement the control according to the control instruction through the control part 140, 240, 340, 440 included in each of the plurality of power boards 100, 200, 300, 400.

For example, when an abnormality occurs in the whole of the grid power supply G that is supplying power to the plurality of power strips 100, 200, 300, 400, it may be controlled as follows: each of the first and second circuit breakers 130, 230, 330, 430 is opened by transmitting a control instruction, which is controlled to open the first and second circuit breakers 130, 230, 330, 430, receive power from a power source other than the grid power source G, and convert and supply the DC power, to the control section 140, 240, 340, 440 included in each of the plurality of power strips 100, 200, 300, 400, to receive power from the bypass power source P or the battery power source B, and convert and supply the DC power, so as to block power supply from the grid power source G and switch to other power supplies.

When an abnormality occurs in any one or more of the plurality of power boards 100, 200, 300, 400, the control device 600 may control to close the first circuit breaker 130a, 230a, 330a, 430a of the power board in which the abnormality occurs and the second circuit breaker 130b, 230b, 330b, 430b of the power board nearest to the power board, thereby causing the power board in which the abnormality occurs to receive the DC power from the adjacent power board through the bus bar 1.

For example, when the switching device 110 of the first power strip 100 among the plurality of power strips 100, 200, 300, 400 fails, a control instruction for controlling to close the first circuit breaker 130a of the first power strip 100 and the second circuit breaker 230b of the second power strip 200, open the second circuit breaker 130b of the first power strip 100 and the first circuit breaker 230a of the second power strip 200, disconnect the plurality of first power conversion devices 110 of the first power strip 100, cause the DC power converted by any one of the plurality of switching devices 210 of the second power strip 200 to be supplied to the second power conversion device 120 of the first power strip 100 through the bus 1, thereby controlling to cause the first circuit breaker 130a of the first power strip 100 and the second circuit breaker 230b of the second power strip 200, cause the DC power converted by any one of the plurality of switching devices 210 of the second power strip 200 to be supplied to any one of the second power strip 100 through the bus 1, and the second power strip 200 to be supplied to any one of the plurality of the DC power conversion devices 120 of the first power strip 100 through the bus 1.

As such, when an abnormality occurs in any one or more of the plurality of power boards 100, 200, 300, 400, it may be controlled to receive the DC power from an adjacent power board through the bus bar 1, whereby each of the plurality of power boards 100, 200, 300, 400 may perform a UPS function between the plurality of power boards 100, 200, 300, 400.

Therefore, even when unexpected abnormality occurs in the plurality of power sources 10, the plurality of power boards 100, 200, 300, 400, and the plurality of loads 20, the power supply system 1000 can continuously maintain the supply of the driving power to the plurality of loads 20, thereby maintaining the operation of the plurality of loads 20 without interruption, enabling an active power supply countermeasure suitable for the occurrence of the abnormality, and enabling stable operation of the plurality of loads 20 and control of the power supply system 1000 regardless of the occurrence type and degree of the abnormality.

The operation example of the power supply system 1000 described above may be implemented as shown in fig. 5 to 8.

The operation example shown in fig. 5 to 8 is an operation example when the power supply system 1000 includes five power boards 100, 200, 300, 400, 500, and the power supply system 1000 may include less than five or more of the plurality of power boards 100, 200, 300, 400, 500.

As shown in fig. 5 to 8, the preferred embodiment of the power supply system 1000 may include five power boards 100, 200, 300, 400, 500, and hereinafter, as shown in fig. 5 to 8, description will be given taking a case in which the plurality of power boards 100, 200, 300, 400, 500 are five as an example.

Fig. 5 is a case where each of the plurality of power boards 100, 200, 300, 400, 500 receives power from the grid power source G of the plurality of power sources 10, in which case power from the bypass power source P and the battery power source B is disconnected, and power may be received through the grid power source G and converted in the order of the DC power source, the driving power source, and supplied to each of the plurality of loads 20.

The operation example shown in fig. 5 is a case of a general operation in which power is received from the grid power source G and is operated, and the general operation of the power supply system 1000 may be performed as shown.

Fig. 6 shows a case where each of the plurality of power boards 100, 200, 300, 400, 500 receives power from the bypass power source P of the plurality of power sources 10, and may be a case where an abnormality occurs in the grid power source G, in which case power supply from the grid power source G and the battery power source B is disconnected, and power may be received through the bypass power source P and converted in the order of the DC power source and the driving power source, and supplied to each of the plurality of loads 20.

The operation example shown in fig. 6 is a case of a special operation in which the bypass power source P receives power and operates, and the special operation of the power supply system 1000 may be performed as shown in the drawing.

Fig. 7 shows a case where each of the plurality of power boards 100, 200, 300, 400, 500 receives power from the battery power source B of the plurality of power sources 10, and may be a case where an abnormality occurs in the grid power source G and the bypass power source P, and in this case, power supply from the grid power source G and the bypass power source P is disconnected, and power may be received by the battery power source B, converted in the order of the DC power source and the driving power source, and supplied to each of the plurality of loads 20.

The operation example shown in fig. 7 is a case of a power-off operation in which power is received from the battery power source B and operated, and the power-off operation of the power supply system 1000 may be performed as shown in the drawing.

Fig. 8 shows a case where each of the plurality of power panels 100, 200, 300, 400, 500 receives power from the emergency power supply a of the plurality of power supplies 10, and may be a case where an abnormality occurs in the grid power supply G, the bypass power supply P, and the battery power supply B, and in this case, the power supply from the grid power supply G, the bypass power supply P, and the battery power supply B is disconnected, and the emergency power supply a may directly supply the driving power to each of the plurality of loads 20.

The operation example shown in fig. 8 is an emergency operation in which the power supply system 1000 is operated while receiving power from the emergency power supply a, and the emergency operation may be performed as shown in the drawing.

As described above, each of the plurality of power boards 100, 200, 300, 400, 500 of the power supply system 1000 may receive power from the same power supply and operate, or each of the plurality of power boards 100, 200, 300, 400, 500 may selectively receive power from any one of the plurality of power supplies 10 and operate.

For example, the first power strip 100 and the second power strip 200 may receive power from the power grid power G and operate, the third power strip 300 and the fourth power strip 400 may receive power from the bypass power P and operate, and the fifth power strip 500 may receive power from the battery power B and operate.

In addition, each of the plurality of power boards 100, 200, 300, 400, 500 may receive power from the plurality of power sources 10 and operate.

For example, in the case where the DC power is supplied from the second power panel 200 to the first power panel 100 due to occurrence of an abnormality in the first power panel 100, the second power panel 200 may convert the power received from the power grid power G into the DC power by the second-1 conversion means 210#1 and transfer it to the respective second power conversion means 220, and also receive the power from the bypass power P and convert it into the DC power by the second-3 conversion means 210#3, and then transfer the DC power converted at the second-3 conversion means 210#3 to the respective second power conversion means 120 of the first power panel 100 by the bus 1.

In the case of the example described above, the first power panel 100 and the second power panel 200 may be connected to the bus bar 1 by closing the first circuit breaker 130a of the first power panel 100 and the second circuit breaker 230b of the second power panel 200, and the supply of the DC power from the second power panel 200 to the first power panel 100 may be achieved through the bus bar 1.

As such, power supply between the plurality of power boards 100, 200, 300, 400, 500, that is, execution of UPS functions between the plurality of power boards 100, 200, 300, 400, 500, may be achieved by each of the plurality of power boards 100, 200, 300, 400, 500 receiving power from the plurality of power supplies 10 and operating.

The embodiments of the power supply device and the power supply system of the present invention described above can be applied to a power supply device that supplies/uses DC power, a power supply system, and an operation method of a power supply system. In particular, the present invention can be effectively applied to a DC UPS module and a power supply system provided with the DC UPS module, and can be applied to a motor control group, a motor control system, a motor operation system, and the like, which control a plurality of motor loads.

The above description has been given of specific embodiments of the present invention, but various modifications can be made without departing from the scope of the present invention. Therefore, the scope of the invention should not be limited to the embodiments described, but should be defined by the appended claims and equivalents thereof.

While the present invention has been described above by way of limited embodiments and drawings, the present invention is not limited to the above-described embodiments, and various modifications and variations can be made from this description by those skilled in the art. Therefore, the inventive concept should be construed solely by the appended claims and their equivalent or equivalent variants shall fall within the scope of the inventive concept.

Description of the reference numerals

10: Power supply 20: load(s)

100 (200, 300, And 400): power supply device (Power panel)

110 (210, 310, And 410): first power conversion device (converter)

120 (220, 320, And 420): second power conversion device (inverter)

130A (230 a, 330a and 430 a): first circuit breaker

130B (230 b, 330b, and 430 b): second circuit breaker

140 (240, 340 And 440): control unit

600: Control device 1000: power supply system

Claims

1. A power supply device, characterized by comprising:

A plurality of first power conversion devices converting power received from each of a plurality of power supplies into DC power;

One or more second power conversion devices that convert the DC power supply into a drive power supply and supply the drive power to a load;

A first circuit breaker disposed between a power source terminal to which a first output terminal of each of the plurality of first power conversion devices and an input terminal of the second power conversion device are connected, the first circuit breaker being connected to an opening/closing unit that limits an output of the DC power source, and a bus connected to the power source terminal to pass the DC power source; and

A second circuit breaker disposed between a second output terminal of any one of the plurality of first power conversion devices and the bus bar;

The output ends of the plurality of first power conversion devices outputting the DC power supply are divided into the first output end and the second output end;

The first output terminal is a circuit that is commonly connected to the outputs of the respective ones of the plurality of first power conversion devices and that flows the DC power output from the plurality of first power conversion devices, the first output terminal being connected to the bus bar and the input terminal of the second power conversion device;

The second output terminal is a circuit that is not connected to the first output terminal and that flows the DC power output from any one of the plurality of first power conversion devices, the second output terminal being connected to the bus bar;

The first circuit breaker changes opening and closing according to a state of at least one of the DC power supply, the driving power supply, the plurality of first power conversion devices, and the load, thereby connecting or restricting the DC power supply between the power supply terminal and the bus bar,

The second circuit breaker changes an opening and closing according to a state of at least one of the DC power source, the driving power source, the plurality of first power conversion devices, and the load, thereby connecting or restricting the DC power source between the second output terminal and the bus.

2. The power supply device according to claim 1, wherein,

The plurality of power supplies includes a first alternating current power supply and a second alternating current power supply that supply an AC power supply.

3. The power supply device according to claim 2, wherein,

The plurality of power supplies further includes a battery storing a DC power source,

When the supply of the DC power to the second power conversion device is interrupted, the power stored in the battery is supplied to the first power conversion device while the supply of the DC power is resumed.

4. The power supply device according to claim 3, wherein,

The case where the supply of the DC power is interrupted is one or more of a case where the supply of the first ac power and the second ac power is interrupted and a case where the operations of the plurality of first power conversion devices receiving the power from the first ac power and the second ac power are interrupted.

5. The power supply device according to claim 3, wherein,

After the interruption of the supply of the DC power, the battery continuously supplies the stored power to the plurality of first power conversion devices until the supply of the DC power is switched and restored.

6. The power supply device according to claim 3, wherein,

The plurality of first power conversion devices comprise a first conversion device, a second conversion device and a third conversion device,

The first conversion device, the second conversion device, and the third conversion device are connected to the first ac power source, the battery, and the second ac power source, respectively, and receive power from a power supply source connected thereto.

7. The power supply device according to claim 6, wherein,

The plurality of first power conversion devices operate by any one of the first conversion device, the second conversion device, and the third conversion device to supply the DC power to the second power conversion device.

8. The power supply device according to claim 7, wherein,

In the case where the power supply to the conversion device that supplies the DC power to the second power conversion device is interrupted, the plurality of first power conversion devices supply the DC power to the second power conversion device through another conversion device other than the conversion device that supplies the power interruption among the first conversion device, the second conversion device, and the third conversion device.

9. The power supply device according to claim 8, wherein,

The power interruption of the power interruption switching device is detected by detecting an abnormal state at one or more of the power interruption switching device, a power supply source connected to the power interruption switching device, and a rated value of the DC power source.

10. The power supply device according to claim 8, wherein,

The plurality of first power conversion devices supply the DC power to the second power conversion device through the second conversion device during a period in which the power-interrupted conversion device is switched to the other conversion device.

11. The power supply device according to claim 3, wherein,

The state of the at least one is at least one of a case where the DC power supply is changed from an initial state, a case where the driving power supply is changed from an initial state, a case where the operation states of the plurality of first power conversion devices are changed, and a case where the driving state of the load is changed.

12. The power supply device according to claim 3, wherein,

The first circuit breaker is closed when the DC power is connected between the power source terminal and the bus bar, and is open when the DC power is limited between the power source terminal and the bus bar.

13. The power supply device according to claim 12, wherein,

When the power supply to the conversion device connected to the first ac power supply and the second ac power supply is interrupted, the first circuit breaker is closed to connect the power source terminal and the bus bar, and the DC power supply is supplied to the second power conversion device from the bus bar to the power source terminal.

14. The power supply device according to claim 13, wherein,

After the power supply of the conversion device connected to the first ac power source and the second ac power source is interrupted, the DC power source is supplied from the conversion device connected to the battery to the second power conversion device until the DC power source turned on from the bus is supplied to the second power conversion device.

15. The power supply device of claim 14, wherein the power supply device comprises a power supply device,

The first circuit breaker is closed only if the second circuit breaker is open.

16. The power supply device according to claim 3, wherein,

The second circuit breaker is closed when the DC power supply is connected between the second output terminal and the bus bar, and is open when the DC power supply is limited between the second output terminal and the bus bar.

17. The power supply device of claim 16, wherein the power supply device comprises a power supply device,

In the case where the power supply of the other power supply device connected to the bus bar is interrupted, the second circuit breaker is closed to connect the second output terminal and the bus bar, thereby conducting the DC power from the second output terminal to the bus bar and supplying the DC power to the other power supply device.

18. The power supply device of claim 17, wherein the power supply device comprises a power supply device,

The second circuit breaker is closed only when the switching unit of the switching device connected to the second circuit breaker and the first circuit breaker are open.

19. A power supply system, comprising:

A plurality of power boards for converting power received from each of a plurality of power supplies into DC power, converting the DC power into driving power for a load, and supplying the load with the driving power;

A bus bar to which a power source terminal to which the DC power is input from each of the plurality of power source boards and a second output terminal to which the DC power is output separately from the power source terminal are connected, to turn on the DC power converted at the plurality of power source boards;

a plurality of first circuit breakers arranged between the power source terminals and the bus bars; and

A plurality of second circuit breakers disposed between each of the second output terminals and the bus bar;

The plurality of power boards respectively include:

A plurality of first power conversion devices converting power received from the plurality of power supplies into the DC power; and

A second power conversion device that converts the DC power received from the plurality of first power conversion devices into the driving power and supplies the driving power to the load;

the output ends of the plurality of first power conversion devices for outputting the DC power supply are divided into a first output end and a second output end;

The plurality of first circuit breakers change opening and closing according to the operation state of more than one power board of the plurality of power boards, thereby connecting or limiting the DC power source between the power source terminal and the bus,

The plurality of second circuit breakers change opening and closing according to an operation state of one or more power boards among the plurality of power boards, thereby connecting or restricting the DC power between the second output terminal and the bus.

20. The power supply system of claim 19, wherein the power supply system further comprises a power supply system,

The plurality of power supplies includes:

a first alternating current power supply and a second alternating current power supply for supplying an AC power supply; and

A battery power supply that stores a DC power supply, and supplies the stored power to the plurality of power boards while the power supply is switched and restored when the power supply of the first ac power supply and the second ac power supply is interrupted;

after the interruption of the power supply, the stored power is supplied to the plurality of power boards by the battery power supply without interruption until the power supply is switched to resume.

21. The power supply system of claim 20, wherein the power supply system further comprises a power supply system,

The plurality of power boards supply the DC power to the second power conversion device through any one of the plurality of first power conversion devices according to the state of the plurality of power supplies.

22. The power supply system of claim 21, wherein the power supply system further comprises a power supply system,

In the case where the power supply of the conversion device that supplies the DC power to the second power conversion device is interrupted, the plurality of power strips supply the DC power to the second power conversion device through the other conversion device than the conversion device that supplies the power interruption among the plurality of first power conversion devices.

23. The power supply system of claim 22, wherein the power supply system further comprises a power supply system,

The plurality of first power conversion devices supply the DC power to the second power conversion device by the conversion device that receives power from the battery power supply during the switching of the power-interrupted conversion device to the other conversion device.

24. The power supply system of claim 20, wherein the power supply system further comprises a power supply system,

The plurality of first circuit breakers are closed when the DC power source is connected between the power source terminal and the bus bar, and are open when the DC power source is limited between the power source terminal and the bus bar,

The plurality of second circuit breakers are closed when the DC power source is connected between the second output terminal and the bus bar, and are open when the DC power source is limited between the second output terminal and the bus bar.

25. The power supply system of claim 24, wherein the power supply system further comprises a power supply system,

Among the plurality of first circuit breakers and the plurality of second circuit breakers,

When one or more of the plurality of power boards is interrupted, a first breaker of the power board for which power is interrupted and a second breaker of a power board adjacent to the power board for which power is interrupted are closed, thereby connecting the power board for which power is interrupted and the adjacent power board to the bus bar to supply the DC power from the adjacent power board to the power board for which power is interrupted.

26. The power supply system of claim 25, wherein the power supply system further comprises a power supply system,

After the power supply interruption, the power supply board for power supply interruption receives the DC power supply from a conversion device connected to the battery power supply, until the DC power conducted from the adjacent power supply board is supplied to the power supply board for power supply interruption.

27. The power supply system of claim 25, wherein the power supply system further comprises a power supply system,

The adjacent power panel is adjacent to the power panel with power supply interrupted and outputs the power panel with the conversion device of the DC power not operated to the second output terminal.