CN114640183A - An energy storage power station system and its operation method - Google Patents

Abstract

The present disclosure relates to an energy storage power station system and an operation method. The energy storage power station system includes an energy storage unit, a station controller and an inverter. The energy storage unit includes a plurality of battery stack modules and a first unit controller. Both the first unit controller and the battery stack module are connected to the first communication line; the site controller is connected to the first communication line, and the site controller communicates with the multiplexer through the first unit controller. Each of the battery stack modules interacts with each other; the inverter is used to connect the battery stack module of the corresponding energy storage unit to the power grid, the inverter is connected to the first communication line, and the site controller passes through the The first communication line interacts with the inverter, and the inverter interacts with the plurality of battery stack modules through the first unit controller. The energy storage power station system of the present disclosure can improve the adaptability of the battery stack module to various station controllers and inverters by configuring an independent unit controller with the energy storage unit as a unit.

Description

An energy storage power station system and its operation method

technical field

The embodiments of the present disclosure relate to the technical field of energy storage power stations, and more particularly, to an energy storage power station system and an operation method thereof.

Background technique

At present, there are mainly two operating modes adopted by the energy storage power stations on the market. They are directly connected to the station controller through the battery stack container, and the station controller periodically reads the battery stack data and controls the start and stop of the battery stack, or The battery stack container is directly connected to the inverter, and the inverter controls a single battery stack container. However, due to the strong coupling between the devices, the products of different manufacturers cannot be used flexibly. Therefore, the battery stack and station controller of the same manufacturer must be used or a low-power inverter must be used, which cannot be adapted to a high-power inverter. This will lead to high project costs and complicated adaptation work. Therefore, it is necessary to provide a technical solution that can reduce costs and simplify the adaptation work.

SUMMARY OF THE INVENTION

An object of the embodiments of the present disclosure is to provide a new technical solution for an energy storage power station system.

According to a first aspect of the present disclosure, an energy storage power station system is provided, the system comprising:

an energy storage unit, the energy storage unit includes a plurality of battery stack modules and a first unit controller, and both the first unit controller and the battery stack module are connected to a first communication line;

a site controller connected to the first communication line, the site controller interacting with a plurality of the battery stack modules through the first unit controller; and,

an inverter, the inverter is used to connect the battery stack module of the corresponding energy storage unit to the grid, the inverter is connected to the first communication line, and the field controller passes the first communication line. A communication line interacts with the inverter, which interacts with a plurality of the battery stack modules through the first cell controller.

Optionally, the system further includes a monitoring terminal, the monitoring terminal includes a host and a display device, the display device is connected to the host, and the host is connected to the first communication line.

Optionally, the system further includes a local server and/or a cloud server, and the unit controller is communicatively connected to the local server and/or the cloud server through a second communication line, wherein the first communication line is connected to the The second communication lines are two lines that are independent of each other.

Optionally, the energy storage unit further includes a second unit controller, the first unit controller interacts with the second unit controller through the first communication line, and the second unit controller can When it is detected that the first unit controller currently serving as the main unit controller does not work normally, the second unit controller is switched to the main unit controller and the battery stack module, the site controller and the The inverter interacts.

Optionally, the second unit controller is connected to the first communication line, a plurality of the battery stack modules are connected to the first communication line in sequence, and the first unit controller The bus interface of the battery stack module is connected to the first communication line, and the second unit controller is connected to the first communication line through the bus interface of the battery stack module sequenced at the bottom.

Optionally, the unit controller of the energy storage unit is connected to the first communication line through a bus interface of a battery stack module.

According to a second aspect of the present disclosure, there is also provided a method for operating an energy storage power station system, where the energy storage power station system is the energy storage power station system according to the first aspect of the present disclosure, and the method is performed by the energy storage power station An energy storage unit of the system is implemented, the method comprising:

The first unit controller of the energy storage unit acts as the main unit controller, scans each battery stack module of the energy storage unit through the first communication line, and obtains the status information of each battery stack module;

When receiving an external request through the first communication line, the main unit controller responds correspondingly to the external request according to the state information.

Optionally, the external request is a control request from a host computer to the battery stack module, wherein the host computer includes a field station controller and/or an inverter, and the external request is performed according to the state information. The corresponding response, including:

obtaining a target power value of each battery stack module according to the state information of each battery stack module;

sending the target power value and the control request to the corresponding battery stack module through the first communication line, and the battery stack module executes the received control request according to the received target power value; or,

The external request is a data request from the host computer to the battery stack module, and the corresponding response to the external request according to the status information includes:

From the status information of each battery stack module, filter out the data content corresponding to the data request;

The data content is returned to the upper computer through the first communication line.

Optionally, the energy storage power station system includes a monitoring terminal, and a host of the monitoring terminal is connected to the first communication line;

The external request is an upgrade request sent by the host of the monitoring terminal through the first communication line, and the corresponding response to the external request according to the status information includes:

According to the upgrade request, send an upgrade command and an upgrade file package corresponding to the upgrade command to each battery stack module through the first communication line;

or,

The external request is an access request sent by the monitoring terminal through the first communication line, and the corresponding response to the external request according to the status information includes:

From the status information of each battery stack module, filter out the data content corresponding to the access request;

Return the data content corresponding to the access request to the monitoring terminal through the first communication line, so as to display the data content through the monitoring terminal.

Optionally, the method further includes:

When the main unit controller is connected to the second communication line, the data stored by the main unit controller is uploaded to the local server and/or the cloud server through the second communication line for data backup, wherein the data is backed up by the main unit controller. The stored data includes status information of each battery stack acquired by the main unit controller; and/or,

When the alternative unit controller of the energy storage unit is in a normal operation state, the main unit controller sends the stored data to the alternative unit controller through the first communication line for data processing. Synchronize.

Optionally, the method further includes:

The alternative unit controller of the energy storage unit sends a heartbeat packet to the main unit controller;

The alternative unit controller determines whether the main unit controller is in a normal operation state according to whether the main unit controller acknowledges the heartbeat packet;

In the case of determining that the main unit controller is not in a normal working state, the alternate unit controller switches the alternate unit controller to the main unit controller for receiving the data through the first communication line. an external request, and correspondingly respond to the external request according to the state information.

One beneficial effect of the embodiments of the present disclosure is that, according to the energy storage power station system of this embodiment, a plurality of battery stack modules are grouped to form an energy storage unit, the energy storage unit itself is provided with a unit controller, and the unit controller is connected with The first communication line of the energy storage power station system is connected, and the site controller of the energy storage power station system is also connected to the first communication line, so that the site controller can communicate with the unit of the energy storage unit through the first communication line The controller communicates and transmits control signals, etc., to achieve the purpose of controlling the battery stack module of the energy storage unit through the unit controller of the energy storage unit. Since the energy storage unit is configured with its own unit controller to interact with the station controller, the energy storage unit as a whole can be used with the station controller and/or inverter of any manufacturer, greatly The cost of the entire system is reduced, and the adaptation work is simplified.

Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

FIG. 1 is a schematic diagram of the composition and structure of an energy storage power station system to which an embodiment of the present disclosure can be applied;

FIG. 2 is a schematic diagram of a composition structure of a monitoring terminal according to an embodiment of the present disclosure;

FIG. 3 is a schematic flowchart of a method for operating an energy storage power station according to an embodiment of the present disclosure.

Detailed ways

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, techniques, methods, and devices should be considered part of the specification.

In all examples shown and discussed herein, any specific values should be construed as illustrative only and not limiting. Accordingly, other instances of the exemplary embodiment may have different values.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further discussion in subsequent figures.

FIG. 1 is a schematic structural diagram of an energy storage power station system to which an embodiment of the present disclosure can be applied. The energy storage power station system includes a station controller 102, an inverter 103, and an energy storage unit 101, and the energy storage unit 101 is provided with an independent unit controller. The number of battery stack modules included in the energy storage unit 101 can be set according to requirements, which is not limited herein. Each battery stack module may further include a plurality of battery cells, which is not limited herein. The energy storage power station system may have one or more energy storage units 101 according to the total number of battery stack modules that the energy storage power station system has and the maximum number of battery stack modules that the energy storage unit 101 may include.

In some embodiments, the energy storage unit 101 may be configured with a unit controller, and the energy storage unit 101 may interact with an external device (eg, a site controller) through the unit controller, that is, the external device may The unit controller interacts with the battery stack module of the energy storage unit 101, thereby improving the ability of the battery stack module to adapt to various external devices, and the external devices may be third-party devices. The unit controller may be a chip with processing capability, such as a single-chip microcomputer, an industrial computer with an operating system, etc., which is not limited here.

In other embodiments, the energy storage unit 101 may also be configured with two unit controllers, which form a redundant design, wherein the first unit controller 1011 acts as the main unit controller and is responsible for the interaction between the energy storage unit and external devices , and perform data synchronization with the second unit controller 1012 as an alternate unit controller. If the current main unit controller fails and cannot work normally, the alternate unit controller can be used as the main unit controller. function, thereby ensuring that the energy storage unit 101 can still work normally when one of the unit controllers fails, thus improving the operational reliability and safety of the energy storage unit.

In the case where the first unit controller 1011 is the primary unit controller, the second unit controller 1012 is the alternate unit controller; in the case where the second unit controller 1012 is the primary unit controller, the first unit controller 1011 is an alternative unit controller.

The cell controller, the battery stack module, the site controller 102 and the inverter 103 are all connected to a first communication line 107 (solid line part) as shown in FIG. 1 . The cell controller of an energy storage unit may communicate with the plurality of stack modules of the energy storage unit through the first communication line 107 . The site controller 102 can interact with the unit controller of the energy storage unit 101 through the first communication line 107, and is mainly used for coordinating power grid debugging and main control management of the entire site. The station controller 102, as the host computer of the energy storage unit 101, may be a computer in any form, or a device with an operating system, such as an industrial computer with a system, which is not limited here.

The inverter 103 has a plurality of electronic switches, the electronic switches may be insulated gate bipolar transistors (Insulated Gate Bipolar Transistor, IGBT), and the inverter 103 can realize the conversion between DC and AC through these electronic switches. In this embodiment, the site controller 102 can control the switching state of the inverter 103 through the first communication line 107 . Taking an energy storage unit as an example, in the embodiment shown in FIG. 1 , the energy storage unit 101 includes a plurality of battery stack modules, such as a first battery stack module 1013 , a second battery stack module 1014 , and a third battery stack module 1015, the fourth battery stack module 1016, the fifth battery stack module 1017, the sixth battery stack module 1018, the energy storage unit 101 further includes a first unit controller 1011 and a second unit controller 1012, two unit controllers 1011 , 1012 , the battery stack modules 1013 to 1018 , the site controller 102 , and the inverter 103 are all connected to the first communication line 107 (solid line). The site controller 102 as an external device is connected to the first communication line 107 , and the site controller 102 can interact with the first unit controller 1011 as the main unit controller through the first communication line 107 to realize the site controller 102 Through the control of the plurality of battery stack modules by the first communication line 107 , the inverter 103 can also interact with the plurality of the battery stack modules of the energy storage unit 101 through the unit controller.

The first cell stack module 1013 , the second cell stack module 1014 , the third cell stack module 1015 , the fourth cell stack module 1016 , the fifth cell stack module 1017 and the sixth cell stack module 1018 are parallel and independent cell stacks modules, these battery stack modules are hung on the first communication line 107 in parallel.

The first communication line 107 may be an Internet (Internet) communication line or other bus, which is not limited herein.

Each main body connected to the first communication line 107, including the battery stack module, the site controller, the unit controller, the inverter, etc., is located in the same local area network.

In this embodiment, both the site controller 102 and the unit controller are connected to the first communication line, therefore, the site controller can control multiple batteries of the energy storage unit 101 through the unit controller of the energy storage unit 101 heap module. In this way, the energy storage unit as a whole can be used with any third-party site controller, which greatly reduces the cost of the entire system and simplifies the adaptation work.

In this embodiment, since the energy storage unit 101 itself is configured with a unit controller, it can customize a matching target power value (or target power value for each battery stack module according to the state information of each battery stack module in the energy storage unit) current), so that the battery stack modules can be charged and discharged according to their respective target power values (or target currents), thereby ensuring that each battery stack module can have a long service life. Therefore, the plurality of battery stack modules of the energy storage unit can be connected to the grid by a unified inverter, and the unified inverter can perform the conversion between DC and AC, without the need to increase the service life of the battery stack modules. An independent low-power inverter is configured for each battery stack module of the energy storage unit, so that the energy storage unit can be adapted to a third-party high-power inverter.

In this embodiment, the energy storage power station system may be provided with one or more inverters, which is not limited herein.

In this embodiment, one inverter may correspond to one energy storage unit 101 , or may correspond to at least two energy storage units 101 , which is not limited herein.

In this embodiment, the battery stack module of the energy storage unit 101 is also connected to the first communication line 107. Therefore, in the case that both unit controllers of the energy storage unit 101 cannot work normally, the site controller 102 can also The first communication line 107 directly interacts with the battery stack module, thereby further improving the operational reliability of the energy storage unit.

In some embodiments, the energy storage power station system further includes a monitoring terminal. As shown in FIG. 1 , the monitoring terminal 104 is connected to the first communication line 107 , and the station controller 102 passes through the first communication line 107 . A communication line 107 controls the switching state of the monitoring terminal 104 .

FIG. 2 is a schematic structural diagram of a monitoring terminal according to an embodiment of the present disclosure. As shown in FIG. 2 , the monitoring terminal 204 includes a host 2041 and a display device 2042 , which communicate with the first communication line through the host 2041 107 is connected, and the display device 2042 is connected to the host 2041 . The staff can monitor the working state of the energy storage unit 101 through the monitoring terminal, and obtain the data of the energy storage unit 101 for viewing.

In some embodiments, the energy storage power station system further includes a local server and/or a cloud server. As shown in FIG. 1 , the first unit controller 1011 communicates with the local server through a second communication line 108 (dashed line part). The server 105 and/or the cloud server 106 are communicatively connected, and the second unit controller 1012 is communicatively connected with the local server 105 and/or the cloud server 106 through a second communication line 108 (dotted line).

The first communication line 107 and the second communication line 108 are two independent lines.

The second communication line 108 may be an Internet (Internet) communication line, or may be another bus, which is not limited herein.

The first communication line 107 and the second communication line 108 may be the same type of communication line, or may be different types of communication lines, which are not limited herein.

In this embodiment, the second communication line 108 may only perform data transmission, which can improve the reliability of data transmission.

In this embodiment, the unit controller may send the relevant data to the local server and/or the cloud server through the second communication line 108 for backup, so as to improve the data security of the energy storage unit 101 .

In one embodiment, the cell controller is connected to the first communication line through a bus interface of a corresponding one of the battery stack modules.

In some embodiments, the battery stack module can be connected to the bus interface through a switch, and the cell controller is also connected to the bus interface through the switch, and the bus interface is connected to the first communication line.

Taking the structure shown in FIG. 1 as an example, the first unit controller 1011 can be connected to the first communication line 107 through a bus interface (a first bus interface 1020 ) of the first battery stack module 1013 . The second cell controller 1012 can be connected to the first communication line 107 through a bus interface (second bus interface 1021 ) of the sixth battery stack module 1018 . The first cell controller 1011 and the second cell controller 1012 correspond to different battery stack modules, thereby reducing the possibility of simultaneous failure of the two cell controllers.

In some embodiments, the plurality of battery stack modules are connected to the first communication line in sequence, and a unit controller of the energy storage unit corresponds to the battery stack module ranked first, that is, the unit controls The controller is connected to the first communication line through the bus interface of the battery stack module in the first order; the alternative cell controller corresponds to the battery stack module in the last order, that is, the alternative cell controller is connected through the battery in the last order. The bus interface of the stack module is connected to the first communication line.

Taking the structure shown in FIG. 1 as an example, the first cell stack module 1013 , the second cell stack module 1014 , the third cell stack module 1015 , the fourth cell stack module 1016 , the fifth cell stack module 1017 , and the sixth cell stack module 1018 Connected to the first communication line 107 in sequence, the first cell controller 1011 corresponds to the first cell stack module 1013 (the cell stack module ranked first), the second cell controller 1012 corresponds to the sixth cell stack module 1012 The battery stack module 1018 (the battery stack module ranked last) corresponds.

By arranging the first cell controller 1011 and the second cell controller 1012 on the two battery stack modules in the first and last order, the mutual coupling between the first cell controller 1011 and the second cell controller 1012 can be avoided, and further It affects the realization of the functions of the two unit controllers and enhances the service life of the two unit controllers.

In the embodiment shown in FIG. 1 , the site controller 102 may interact with a plurality of battery stack modules of the energy storage unit 101 through the unit controller of the energy storage unit 101 . In this way, the energy storage unit 101 as a whole can be used with any third-party site controller, which greatly reduces the cost of the entire system and simplifies the adaptation work. Further, since the energy storage unit 101 itself is configured with a unit controller, it can customize a matching target power value for each battery stack module according to the state information of each battery stack module in the energy storage unit. Multiple battery stack modules of the energy storage unit can be connected to the grid by a unified inverter, so that the energy storage unit can be adapted to third-party high-power inverters, which also effectively improves the battery stack modules of the energy storage power station. Adaptability of various third-party inverters.

FIG. 3 is a schematic flowchart of a method for operating an energy storage power station to which an embodiment of the present disclosure can be applied. The method is implemented by the energy storage unit 101 in FIG. 1. As shown in FIG. 3, the method may include the following steps S301-S302:

S301: A unit controller of the energy storage unit acts as a main unit controller, scans each battery stack module of the energy storage unit through a first communication line, and obtains status information of each battery stack module.

In some embodiments, as shown in FIG. 1 , if the first unit controller 1011 in the energy storage unit 101 is used as the main unit controller, the energy storage unit can be scanned every preset time through the first communication line 107 The first cell stack module 1013, the second cell stack module 1014, the third cell stack module 1015, the fourth cell stack module 1016, the fifth cell stack module 1017, and the sixth cell stack module 1018 in 101, to obtain each cell stack Status information for the module.

The setting of the preset time depends on the data type, and can be 1 minute or 1 millisecond; the status information may include: the power level, temperature, start-stop status, and the like of the battery stack.

S302: In the case of receiving an external request through the first communication line, the main unit controller responds correspondingly to the external request according to the state information.

In some embodiments, the host computer includes a site controller and/or an inverter, wherein, if the external request is a control request of the host computer for the battery stack module, in step S302, the control request is performed according to the state information. The external request responds accordingly, which may include:

According to the state information of each battery stack module, the target power value of each battery stack module is obtained, and the target power value and the control request are sent to the corresponding battery stack module through the first communication line. The battery stack module executes the received control request according to the received target power value.

With reference to the system structure shown in FIG. 1 , the host computer is the site controller 102 and/or the inverter 103 , and the site controller 102 and/or the inverter 103 sends a message to the main unit controller 1011 Control request for cell stack modules (first cell stack module 1013, second cell stack module 1014, third cell stack module 1015, fourth cell stack module 1016, fifth cell stack module 1017, and sixth cell stack module 1018) , after the main unit controller 1011 receives the control request through the first communication line 107, it performs current sharing calculation according to the state information of each battery stack module obtained, and obtains the first battery stack module 1013 and the second battery stack module. 1014, the third cell stack module 1015, the fourth cell stack module 1016, the fifth cell stack module 1017 and the sixth cell stack module 1018 target power values respectively, and then pass the target power value and the control request through the first The communication line 107 is sent to the corresponding battery stack module. The battery stack module executes the received control request according to the received target power value, for example, the main unit controller sends the target power value of the first battery stack module 1013 and the shutdown request to the first battery stack module 1013 through the first communication line 107. A battery stack module 1013, and then the first battery stack module 1013 performs a shutdown operation according to the received target power value to turn off the first battery stack module 1013.

In one embodiment, with reference to the system structure shown in FIG. 1 , the host computer is the site controller 102 and/or the inverter 103, and the site controller 102 and/or the inverter 103 The main unit controller 1011 sends information about the cell stack modules (the first cell stack module 1013, the second cell stack module 1014, the third cell stack module 1015, the fourth cell stack module 1016, the fifth cell stack module 1017 and the sixth cell stack module 1018), after the main unit controller 1011 receives the data request through the first communication line 107, it filters out the data request corresponding to the data request from the status information of each battery stack module. The data content is returned to the site controller 102 and/or the inverter 103 through the first communication line 107 .

In some embodiments, as shown in FIG. 1 , the energy storage power station system may include a monitoring terminal, and the external request may be an upgrade request sent by the host of the monitoring terminal through the first communication line. In this embodiment, the corresponding response to the external request according to the state information in the above step S302 may include:

According to the upgrade request, an upgrade command and an upgrade file package corresponding to the upgrade command are sent to each battery stack module through the first communication line.

In one embodiment, with reference to the schematic diagrams of the composition and structure of a monitoring terminal shown in FIG. 1 and FIG. 3 , the host of the monitoring terminal 104 (it may also be the monitoring terminal 204 in FIG. 3 ) The first communication line 107 sends an upgrade request to the main unit controller 1011, and the main unit controller 1011 sends an upgrade request to the first cell stack module 1013, the second cell stack module 1014, The third battery stack module 1015, the fourth battery stack module 1016, the fifth battery stack module 1017 and the sixth battery stack module 1018 send an upgrade command and an upgrade file package corresponding to the upgrade command, and receive the upgrade command and the corresponding upgrade After the file package, perform the upgrade operation for each battery stack module; if the battery stack module fails to be upgraded, the above upgrade operation needs to be performed again.

The above upgrade file package can be sent by the host of the monitoring terminal to the main unit controller 1011 through the first communication line 107 .

In one embodiment, with reference to the schematic diagrams of the composition and structure of a monitoring terminal shown in FIG. 1 and FIG. 3 , the host of the monitoring terminal 104 (it may also be the monitoring terminal 204 in FIG. 3 ) can pass the first communication line 107 An access request is sent to the main unit controller 1011, and the main unit controller 1011, according to the access request, obtains the first battery stack module 1013, the second battery stack module 1014, the third battery stack module 1015, and the fourth battery stack module. 1016 , in the status information of the fifth battery stack module 1017 and the sixth battery stack module 1018, filter out the data content corresponding to the access request, and send the data content corresponding to the access request through the first communication line 107 Return to the monitoring terminal 104, and display the data content through the display device 2042 of the monitoring terminal for the staff to review.

In some embodiments, when the main unit controller is connected to the second communication line, the data stored by the main unit controller is uploaded to the local server and/or the cloud server through the second communication line. Data backup, wherein the stored data includes state information of each battery stack acquired by the main unit controller.

In one embodiment, the main unit controller 1011 is connected to the second communication line 108 through the first bus interface 1020 , and the data stored by the main unit controller is uploaded to the local server 105 through the second communication line 108 and/or the cloud server 106 to perform data backup, wherein the stored data includes the status information of each battery stack module acquired by the main unit controller 1011 .

In one embodiment, when the data stored in the main unit controller is uploaded to the local server 105 and/or the cloud server 106 through the second communication line 108 for data backup, if the first data of the energy storage unit 101 When the second unit controller 1012 is in the running state, the stored data is sent to the second unit controller 1012 through the first communication line 107 for data synchronization.

In some embodiments, the energy storage unit is provided with two unit controllers, one of which is used as the main unit controller and the other is used as a backup controller, and the backup unit controller of the energy storage unit (ie the backup controller, For example, the second unit controller 1012 in FIG. 1 sends a heartbeat packet to the main unit controller, and the alternative unit controller determines the main unit according to whether the main unit controller acknowledges the heartbeat packet Whether the controller is in a normal operating state; if the alternate unit controller determines that the main unit controller is not in a normal operating state, the alternate unit controller is switched to the main unit controller as the main unit controller. The unit controller executes the above steps S301 and S302 and the like.

In one embodiment, as shown in FIG. 1 , the second unit controller 1012 of the energy storage unit 101 sends a heartbeat packet to the main unit controller 1011 every preset time, and the second unit controller 1012 According to whether the main unit controller receives the heartbeat packet, if the main unit controller is in a normal operation state, the second unit controller 1012 keeps the original state; In an abnormal operation state, the second unit controller 1012 is switched to the main unit controller, and performs all the functions of the original main unit controller, which will not be repeated here. In this way, when the main unit controller fails, the second unit controller can immediately replace the main unit controller, which can prevent the two controllers from failing at the same time, and improve the safety of the energy storage power station system.

For the above energy storage power station system, the energy storage unit may further include a memory, and the memory is used to store a computer program, and the computer program is used to control the two unit controllers to execute the method steps implemented by each of the above method embodiments, that is, , a unit controller of the energy storage unit can be configured to perform the above method steps implemented by the main unit controller as the main unit controller, and an alternate unit controller of the energy storage unit can be configured to perform the above by the backup control. The method steps implemented by the device. A skilled person can design the computer program according to the solution disclosed in the present invention. How the computer program controls the processor to operate is well known in the art, so it will not be described in detail here.

In some embodiments, there is also provided a computer-readable storage medium on which a computer program for causing the unit controller to implement the method steps performed by each of the above method embodiments is also provided.

A computer-readable storage medium may be a tangible device that can hold and store instructions for use by the instruction execution device. The computer-readable storage medium may be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples (non-exhaustive list) of computer readable storage media include: portable computer disks, hard disks, random access memory (RAM), read only memory (ROM), erasable programmable read only memory (EPROM) or flash memory), static random access memory (SRAM), portable compact disk read only memory (CD-ROM), digital versatile disk (DVD), memory sticks, floppy disks, mechanically coded devices, such as printers with instructions stored thereon Hole cards or raised structures in grooves, and any suitable combination of the above. Computer-readable storage media, as used herein, are not to be construed as transient signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides or other transmission media (eg, light pulses through fiber optic cables), or through electrical wires transmitted electrical signals.

The computer readable program instructions described herein may be downloaded to various computing/processing devices from a computer readable storage medium, or to an external computer or external storage device over a network such as the Internet, a local area network, a wide area network, and/or a wireless network. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers, and/or edge servers. A network adapter card or network interface in each computing/processing device receives computer-readable program instructions from a network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in each computing/processing device .

The computer program instructions for carrying out the operations of the present invention may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine dependent instructions, microcode, firmware instructions, state setting data, or instructions in one or more programming languages. Source or object code written in any combination, programming languages including object-oriented programming languages - such as Smalltalk, C++, etc., and conventional procedural programming languages - such as the "C" language or similar programming languages. The computer readable program instructions may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer, or entirely on the remote computer or server implement. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (eg, using an Internet service provider through the Internet connect). In some embodiments, custom electronic circuits, such as programmable logic circuits, field programmable gate arrays (FPGAs), or programmable logic arrays (PLAs), can be personalized by utilizing state information of computer readable program instructions. Computer readable program instructions are executed to implement various aspects of the present invention.

Aspects of the present invention are described herein with reference to flowchart illustrations and/or block diagrams of methods, systems and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer readable program instructions.

These computer readable program instructions may be provided to a processor of a general purpose computer, special purpose computer or other programmable data processing apparatus to produce a machine that causes the instructions when executed by the processor of the computer or other programmable data processing apparatus , resulting in means for implementing the functions/acts specified in one or more blocks of the flowchart and/or block diagrams. These computer readable program instructions can also be stored in a computer readable storage medium, these instructions cause a computer, programmable data processing apparatus and/or other equipment to operate in a specific manner, so that the computer readable medium on which the instructions are stored includes An article of manufacture comprising instructions for implementing various aspects of the functions/acts specified in one or more blocks of the flowchart and/or block diagrams.

Computer readable program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other equipment to cause a series of operational steps to be performed on the computer, other programmable data processing apparatus, or other equipment to produce a computer-implemented process , thereby causing instructions executing on a computer, other programmable data processing apparatus, or other device to implement the functions/acts specified in one or more blocks of the flowcharts and/or block diagrams.

The flowchart and block diagrams in the Figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions, which comprises one or more executables for implementing the specified logical function(s) instruction. In some alternative implementations, the functions noted in the blocks may occur out of the order noted in the figures. For example, two blocks in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It is also noted that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented in dedicated hardware-based systems that perform the specified functions or actions , or can be implemented in a combination of dedicated hardware and computer instructions. It is well known to those skilled in the art that implementation in hardware, implementation in software, and implementation in a combination of software and hardware are all equivalent.

Various embodiments of the present invention have been described above, and the foregoing descriptions are exemplary, not exhaustive, and not limiting of the disclosed embodiments. Numerous modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein was chosen to best explain the principles of the various embodiments, the practical application or technical improvement in the marketplace, or to enable others of ordinary skill in the art to understand the various embodiments disclosed herein. The scope of the invention is defined by the appended claims.

Claims (11)

1. An energy storage power station system, comprising:

the energy storage unit comprises a plurality of battery stack modules and a first unit controller, and the first unit controller and the battery stack modules are connected with a first communication line;

the station controller is connected with the first communication line and interacts with the battery stack modules through the first unit controller; and the number of the first and second groups,

the inverter is used for connecting the battery stack modules of the corresponding energy storage units with a power grid, the inverter is connected with the first communication line, the field controller interacts with the inverter through the first communication line, and the inverter interacts with the battery stack modules through the first unit controller.

2. The system of claim 1, further comprising a monitor terminal, the monitor terminal comprising a host and a display device, the display device being connected to the host, the host being connected to the first communication line.

3. The system of claim 1, further comprising a local server and/or a cloud server, wherein the unit controller is communicatively connected to the local server and/or the cloud server via a second communication line, and wherein the first communication line and the second communication line are independent of each other.

4. The system of claim 1, wherein the energy storage unit further comprises a second unit controller, wherein the first unit controller interacts with the second unit controller via the first communication line, and wherein the second unit controller is capable of switching the second unit controller to a master unit controller to interact with the stack module, the field controller, and the inverter upon detecting that the first unit controller, which is currently the master unit controller, is not operating properly.

5. The system of claim 4, wherein the second unit controller is connected to the first communication line, the plurality of stack modules are sequentially connected to the first communication line, the first unit controller is connected to the first communication line through a bus interface of a stack module that is ranked first, and the second unit controller is connected to the first communication line through a bus interface of a stack module that is ranked last.

6. The system according to any one of claims 1 to 5, wherein the cell controller of the energy storage unit is connected to the first communication line via a bus interface of one stack module.

7. A method of operating an energy storage power station system, the energy storage power station system being an energy storage power station system according to any one of claims 1 to 6, the method being performed by an energy storage unit of the energy storage power station system, the method comprising:

the first unit controller of the energy storage unit is used as a main unit controller, and each battery stack module of the energy storage unit is scanned through a first communication line to obtain the state information of each battery stack module;

and the main unit controller responds to the external request correspondingly according to the state information under the condition of receiving the external request through the first communication line.

8. The method of claim 7, wherein the external request is a control request of an upper computer to a battery stack module, wherein the upper computer comprises a field station controller and/or an inverter, and wherein the responding to the external request according to the state information comprises:

obtaining a target power value of each cell stack module according to the state information of each cell stack module;

the target power value and the control request are sent to a corresponding battery stack module through the first communication line, and the battery stack module executes the received control request according to the received target power value; or,

the external request is a data request of the upper computer to the cell stack module, and the corresponding response to the external request according to the state information comprises the following steps:

screening out data content corresponding to the data request from the state information of each cell stack module;

and returning the data content to the upper computer through the first communication line.

9. The method according to claim 7, characterized in that the energy storage power station system comprises a monitoring terminal, and a host of the monitoring terminal is connected with the first communication line;

the external request is an upgrade request sent by the host of the monitoring terminal through the first communication line, and the responding to the external request according to the state information includes:

according to the upgrading request, an upgrading command and an upgrading file packet corresponding to the upgrading command are sent to each battery stack module through the first communication line;

or,

the external request is an access request sent by a monitoring terminal through a first communication line, and the responding to the external request according to the state information comprises the following steps:

screening out data content corresponding to the access request from the state information of each cell stack module;

and returning the data content corresponding to the access request to the monitoring terminal through the first communication line so as to display the data content through the monitoring terminal.

10. The method of claim 7, further comprising:

the method comprises the following steps that under the condition that a main unit controller is connected to a second communication line, data stored by the main unit controller are transmitted to a local server and/or a cloud server through the second communication line for data backup, wherein the stored data comprise state information of each battery pile acquired by the main unit controller; and/or the presence of a gas in the gas,

and the main unit controller sends the stored data to the standby menu unit controller through the first communication line for data synchronization under the condition that the standby menu unit controller of the energy storage unit is in a normal operation state.

11. The method of claim 7, further comprising:

the standby unit controller of the energy storage unit sends a heartbeat packet to the main unit controller;

the standby unit controller judges whether the main unit controller is in a normal running state or not according to whether the main unit controller confirms the heartbeat packet or not;

and under the condition that the standby unit controller judges that the main unit controller is not in a normal working state, the standby unit controller is switched to the main unit controller and is used for receiving an external request through the first communication line and responding to the external request correspondingly according to the state information.

Images