WO2015053484A1 - 고압 직류 전류 차단 장치 및 방법 - Google Patents
고압 직류 전류 차단 장치 및 방법 Download PDFInfo
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- WO2015053484A1 WO2015053484A1 PCT/KR2014/008403 KR2014008403W WO2015053484A1 WO 2015053484 A1 WO2015053484 A1 WO 2015053484A1 KR 2014008403 W KR2014008403 W KR 2014008403W WO 2015053484 A1 WO2015053484 A1 WO 2015053484A1
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- current
- switch
- circuit
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- power semiconductor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for DC applications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/59—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the AC cycle
- H01H33/596—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the AC cycle for interrupting DC
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/541—Contacts shunted by semiconductor devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/541—Contacts shunted by semiconductor devices
- H01H9/542—Contacts shunted by static switch means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/547—Combinations of mechanical switches and static switches, the latter being controlled by the former
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/541—Contacts shunted by semiconductor devices
- H01H9/542—Contacts shunted by static switch means
- H01H2009/543—Contacts shunted by static switch means third parallel branch comprising an energy absorber, e.g. MOV, PTC, Zener
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/541—Contacts shunted by semiconductor devices
- H01H9/542—Contacts shunted by static switch means
- H01H2009/544—Contacts shunted by static switch means the static switching means being an insulated gate bipolar transistor, e.g. IGBT, Darlington configuration of FET and bipolar transistor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/541—Contacts shunted by semiconductor devices
- H01H9/542—Contacts shunted by static switch means
- H01H2009/546—Contacts shunted by static switch means the static switching means being triggered by the voltage over the mechanical switch contacts
Definitions
- the present invention relates to a DC current blocking device and method, and more particularly, it is possible to quickly cut off a high-voltage DC current in a transmission line using a voltage converter that requires a significantly faster breaking time than a conventional current converter.
- the present invention relates to a current interruption device and a method thereof.
- the proposed hybrid dc circuit breaker is a combination of a mechanical switch and a power semiconductor switch, which enables fast breakdown times and relatively small steady-state conduction losses to meet demands.
- the portion of the main circuit that serves as the main interruption of the current flowing in the main circuit is composed of a power semiconductor circuit breaker, which does not cause power loss under normal energization.
- a power semiconductor circuit breaker which does not cause power loss under normal energization.
- HVDC high voltage direct current
- the auxiliary power semiconductor switch applied to the main conducting unit is also composed of a small amount of power semiconductor, but must bear the power loss compared to the mechanical switch because it has to play a role of energizing the rated current in a steady state. Along with this is the burden on the cooling system of the power semiconductor switch. In addition, since the capacity of the input surge current is limited, there are also many problems to consider in the application of a real system.
- the present invention has been made to solve the above problems, to provide a DC current blocking device having a simple structure consisting of three high-speed mechanical switches the main conducting path.
- the present invention seeks to provide a DC current blocking device with low power loss and flexibility in various systems.
- the DC current blocking device for cutting off the DC current in the event of an accident
- three high-speed mechanical type is installed in series on the main current path for energizing the current in the normal operating state
- a main energizing unit including a switch;
- a power semiconductor switch installed on a primary current circuit connected in parallel to one mechanical switch of the high speed mechanical switches belonging to the main conducting unit; parallel to the high speed mechanical switches connected in series of two of the main conducting paths;
- a capacitor installed on the secondary current circuit, which is a circuit connected to each other;
- a surge arrester installed on a tertiary current circuit which is a circuit connected in parallel with a capacitor on a circuit connected in parallel with two series-connected mechanical switches in the main conducting path.
- the mechanical switch of the main energization circuit connected in parallel with the primary current circuit to which the power semiconductor switch is connected is characterized by the installation of a mechanical switch having a lower rated voltage than the other two mechanical switch rated voltages connected in series. It provides a DC current interruption device.
- a mechanical switch connected in parallel with the power semiconductor switch causes a forward voltage lower than an arc voltage to be applied when the current is open in an energized state.
- a direct current interruption device characterized in that the current of the power semiconductor switch makes it easy to make a current.
- the mechanical switch of the main current supply circuit connected in parallel with the power semiconductor switch of the primary current circuit is a monostable switch and receives a trip signal of a DC circuit breaker to perform an opening operation.
- the capacitor provides a DC current blocking device, characterized in that installed on the circuit branched from the main conduction path at the rear end of the input / disconnect switch.
- the capacitor is connected in parallel with the current switch when the transient voltage applied when the current of the main conduction path is cut off by the power semiconductor switch is shared between the protection switch and the current switch.
- a direct current interruption device having a capacitance such that an applied voltage does not exceed the withstand voltage limit of a power semiconductor switch.
- the apparatus may further include a discharge unit for discharging the voltage charged in the capacitor after the DC current blocking operation is finally terminated by the input / disconnect switch.
- the discharge unit provides a DC current blocking device comprising a discharge switch and a discharge resistor is connected in series with each other on a discharge path connected in parallel with the circuit in which the capacitor is installed.
- the power semiconductor switch of the first current circuit is formed by one unidirectional conducting switch or by connecting two unidirectional conducting switches in series in opposite directions to each other and by connecting a freewheeling diode to each unidirectional conducting switch in parallel. It provides a DC current blocking device, characterized in that.
- three high-speed mechanical switch input / disconnect switch is connected in series on the main current path for energizing the current in the normal operating state
- a main energizing unit including a protection switch and a current switch;
- a power semiconductor switch on a circuit connected in parallel with the current switch of the main conducting path;
- a capacitor installed to be connected in parallel with a protection switch and a current switch on a circuit connected in parallel with the main conducting path;
- a surge arrester installed to be connected in parallel with a capacitor on a circuit connected in parallel with the main conducting path; and using a DC current interruption device including a normal current flowing through only three mechanical switches of the main conducting path.
- insulation recovery may be performed on the transient voltage generated after the electrode of the protection switch in which the arc was generated. It provides a DC current blocking method characterized in that the setting when the distance between the electrodes is secured.
- the present invention also provides a DC current blocking method for operating a discharge unit for discharging a voltage charged in a capacitor after the input / disconnect switch is opened.
- the discharge unit may include a discharge switch and a discharge resistor installed in series on a discharge path connected in parallel with a circuit in which the capacitor is installed, and the discharge switch to discharge the voltage charged in the capacitor through the discharge path.
- a DC current blocking method characterized in that the opening is performed after closing.
- the protection switch of the main conducting unit first, and then closing the closing / closing switch to provide a DC current blocking method characterized in that the injection of the DC current (dc) breaking device.
- the power semiconductor blocking unit is replaced by a capacitor as compared to the conventional DC current blocking device in which the main blocking function is performed by the power semiconductor blocking method, the configuration is simplified, thereby improving reliability and There is an advantage that the cost can be reduced.
- the main conducting unit is composed of only mechanical switches, the power loss in the steady state is considerably lower than the case in which the mechanical switch and the power semiconductor switch are mixed, and thus the power semiconductor switch which causes noise reduction and reliability deterioration in long-term operation.
- the benefits of streamlining the cooling system will also be achieved.
- the mechanical switch configuration of the main conducting unit can improve the input surge current capacity of the DC circuit breaker, which is a turn-on of a power semiconductor switch element in a mixed method of a conventional mechanical switch and a power semiconductor switch. This is because they can be freed from being limited in characteristics.
- the DC current blocking device of the present invention is a hybrid DC current blocking device having a high speed cut-off characteristic, it can be usefully applied in various ways to the high-voltage DC current (DC) line operating as a voltage converter.
- DC DC current
- FIG. 1 is a circuit diagram showing the configuration of a DC current blocking device according to an embodiment of the present invention.
- FIG. 2 is a flowchart illustrating a method of operating a DC current interrupting device according to the present invention.
- FIG. 3 is a view for explaining the relationship between the shape of the current over time and the operating elements thereof in the operation of the DC current blocking device according to the present invention.
- FIG. 4 is an enlarged view of current waveforms after the point in time T2 shown in FIG. 3 and voltage waveforms applied to the power semiconductor switch and the high speed mechanical switch.
- FIG. 5 is a circuit diagram showing the configuration of a DC power cut-off device according to another embodiment of the present invention, and shows a configuration of a cut-off device for bidirectional current energization.
- the present invention relates to a DC current blocking device and a method having a high speed breaking function, in particular, a hybrid high voltage DC current blocking device having a high speed breaking characteristic required in a high voltage DC line operated as a voltage converter and its operation. It is about a method.
- the present invention is to provide a DC current cut-off device and method that can reduce the power supply loss in the steady state and relatively simple configuration can lower the cost of the device to secure the competitiveness in terms of economics
- the main breaker is a power semiconductor switch It is composed only of high-speed mechanical switches, and includes a new and differentiated device configuration and its configuration compared to the conventional complicated and expensive DC current blocking method in which the main interruption function is performed by the interruption method by the power semiconductor switch. The purpose of this paper is to suggest an operation method.
- the main conducting portion is composed of high-speed mechanical switches, which caused the cost and complexity
- a device configuration and a method of operating the same are described.
- the DC current interruption device of the present invention three high-speed mechanical switches are connected in series to each other so that a rapid DC current blocking function can be performed between the power supply and the load. It consists of a main conducting unit for conducting a current, it is configured by connecting a power semiconductor switch in parallel with respect to one high-speed mechanical switch included on the main conducting unit between the power supply and the load.
- the three high-speed mechanical switches installed in the main current carrying section are, in order, the first mechanical switch for circuit disconnection and input (hereinafter referred to as input / disconnect switch) and the second mechanical switch connected to the rear end from the transient voltage generated when the current is cut off.
- a mechanical switch hereinafter referred to as a protection switch
- the current switch is to provide the breaking current when the current is interrupted.
- the power semiconductor switch is installed in a primary current circuit connected in parallel, and configured to take a role of causing a breaking current.
- the mechanical switch used is a bi-stable switch which operates at high speed, and the input / disconnect switch and the protective switch have the same form as a normal switch in which the on and off states are stably present.
- the current switch is a high-speed monostable switch, in which the contact becomes open and then automatically returns to the closed state only for a predetermined time when a trip signal is applied. Apply the switch. Therefore, the open state of the current switch should return to the close state at the time after the blocking current has completely flowed into the secondary current circuit in which the capacitor is installed.
- the protection switch is made to bear.
- a capacitor in a circuit connected in parallel with the protection switch and the current switch connected in series to the main conducting unit, when the current of the main conducting path is cut off, it functions as a secondary current circuit. It consists of a tertiary current circuit by installing a surge arrester in a circuit connected in parallel with a capacitor to release the energy stored in the capacitor.
- Figure 1 is a circuit diagram showing the configuration of the DC current blocking device according to an embodiment of the present invention, the configuration of an embodiment for unidirectional current energization It is a figure which shows.
- a circuit 1 (hereinafter referred to as a main conducting path) used to conduct current in a normal operating state between a power supply and a load.
- the whole 10 is constituted.
- the power semiconductor switch is installed on a circuit connected in parallel with the current switch on the main conducting path, and the current flowed to the current switch when the current is interrupted by the power semiconductor switch. It is configured to cut off the main current supply part by the blocking function of the semiconductor switch.
- a circuit 15 is installed on the circuit 14 connected in parallel with the main conduction path 1 between the power supply and the load, and the circuit 19 connected in parallel with the circuit 14 on which the capacitor 15 is installed.
- a discharge furnace On the following (hereinafter referred to as a discharge furnace), a mechanical switch 20 (hereinafter referred to as a discharge switch) and a discharge resistor 21 are installed so as to be connected in series with each other to constitute a discharge portion 18.
- the capacitor 15 is installed on the circuit 14 branched from the main conduction path 1 at the rear end of the input / disconnect switch 11, so that the protection switch 12 and the current of the main conducting unit 10 It is provided so that it may be connected to the switch 13 in parallel.
- the capacitor 15 has a transient voltage applied when the current of the main conducting unit 10 is interrupted by the power semiconductor switch 2 to share the protection switch 12 and the current switch 13 of the main conducting unit.
- the capacitance is set so that the transient voltage slope does not exceed the withstand voltage limit of the current switch designed at the low rated voltage and the power semiconductor switch connected in parallel.
- a surge arrester 17 is installed on the main conducting path 1, the discharge path 19, and another circuit 16 connected in parallel with the circuit 14 in which the capacitor 15 is installed.
- the input / disconnect switch, the protection switch and the current switch start the open operation at the same time according to the trip signal by the controller and after the current switch opens.
- the power semiconductor switch connected in parallel is turned on and the current flowing through the current switch flows through the power semiconductor switch, and the arc between the poles is extinguished.
- the power semiconductor switch 2 is turned off according to the control signal of the control unit during the current interruption operation to perform a function of quickly cutting off the current flowing in the main conducting unit 10 within a few tens of milliseconds.
- the semiconductor switch 13 is interrupted, the flow of current flows into the capacitor 15.
- the protection switch 12 maintains energization by an arc while securing a predetermined distance between the contacts at the point in time when the power semiconductor switch 2 cuts off the current, the semiconductor switch cuts off the current. As the arc is extinguished, the interstitial insulation is restored.
- the interval between the electrodes of the protection switch 12 in which the arc was generated afterwards is excessive. It is set when the distance between electrodes which can have sufficient insulation breakdown characteristic with respect to voltage is ensured.
- the current flowing from the main conducting unit 10 to the capacitor 15 increases the voltage by charging the capacitor.
- the magnitude of the charging voltage becomes larger than the discharge start voltage of the surge arrester 17, the current Current is surged into the surge arrester 17, through which energy stored on the DC line is released, thereby blocking current.
- the discharge unit 18 is a circuit unit for preventing various phenomena that may occur when excessive discharge current flows due to the voltage charged in the capacitor 15 when the blocking device is re-inserted after the blocking operation of the DC current is completed. .
- the discharge switch 20 is set to the open state before closing the protective switch 12 of.
- FIG. 2 is a flowchart illustrating a method of operating a DC current blocking device according to the present invention. Referring to this, a process of cutting off a DC current by the blocking device shown in FIG. 1 will be described below.
- the power semiconductor switch 13 is turned off immediately after generation of an arc between electrodes of the protection switch 12, thereby providing a direct current.
- the main current path of the blocking device is to open ("open") operation.
- the capacitor current is charged while the line current flowing to the main conducting unit 10 flows into the capacitor 15 installed on the secondary current circuit, and the charging voltage of the capacitor 15 rises. To be discharged to the discharge start voltage of the surge arrester 17.
- the surge arrester 17 starts to discharge, and the line current flows through the surge arrester installed on the tertiary current circuit, and the energy charged in the line surges. Absorbed through the raster 17, the current is completely blocked, thereby completing all current blocking operations of the DC current blocking device.
- the current is driven by the power semiconductor switch with the arc voltage of the current switch of the main conducting unit 10, and then the primary current in the state in which the protection switch 12 is opened.
- the power semiconductor switch 2 installed on the circuit is turned off to cut off the current first, and the current flows through the capacitor 15 installed on the secondary current circuit.
- the capacitor charging voltage is increased to some extent so that the current flows to the surge arrester 17 installed on the tertiary current circuit so that all the energy of the line is absorbed. It is to ensure complete current blocking.
- the discharge path 19 The discharge switch 20 installed at the T4 is closed at the time T4 and then opened to discharge the voltage charged in the capacitor 15 (S5).
- Figure 3 is a view for explaining the relationship between the shape of the current according to the time course and the operation elements in the operation of the DC current blocking device according to the present invention, DC current blocking device at each operation time shown in FIG. The shape of the energizing current which flows through is shown.
- T1 denotes an accident occurrence time
- T2 denotes that all three high-speed mechanical switches of the main conducting unit 10 start opening due to a trip signal, and the power semiconductor switch is turned on and the current ( All of the current flowing through the main conducting portion flowing through the flow switch is caused to flow through the power semiconductor switch.
- the current of the main conduction portion starts from the current switch to the power semiconductor switch due to the mutual relationship between the arc voltage between the current switch poles and the power semiconductor switch forward operating voltage.
- the open current of the power semiconductor switch indicates a time at which the main conducting unit current starts to flow to the capacitor 15.
- i1 represents a current flowing through the main conducting path 1
- I2 indicates the current flowing through the capacitor 15, and i3 indicates the current flowing through the surge arrester 17, respectively.
- the transient recovery voltage generated from the time point T3 is applied to the two switches connected in series in the main power supply unit 10, that is, the protection switch and the current switches 12 and 13, respectively, and at the time T3 ′, the main power supply unit 10 is input.
- the disconnection of the fault current is completed by opening the / isolating switch.
- the capacitor 15 is discharged through the close-open operation of the discharge switch 20, and at the time T5, the protection switch of the main conducting unit 10 for the input of the DC current blocking device ( After closing 12), finally close the input / disconnect switch 11 at the time T6 so that current is energized in a normal operating state.
- the form which is shared by the protection switch 12 and the power semiconductor switch 13 of a main electricity supply part is shown.
- V2 voltage (V2) is applied in parallel with the power semiconductor switch in consideration of the stray capacitance of the protection switch so that a certain ratio of voltage V2 is applied to the protection switch 12. Connection of shared capacitors is necessary.
- FIG. 5 is a circuit diagram showing the configuration of a DC power cut-off device according to another embodiment of the present invention.
- the capacitor 15 and the surge arrester 17, the discharge switch 20, and the discharge resistor 21 may be connected to the main conducting unit 10 similarly to the embodiment of FIG. 1.
- FIG. 5 replaces the power semiconductor switch 13 connected in parallel with the current switch of the main conducting unit 10 with the configuration of the bidirectional conducting switch from the unidirectional conducting switch, compared to the embodiment of FIG. 1.
- the bidirectional conduction switch has a structure in which two unidirectional conduction switches 22 are connected in series with each other in reverse direction.
- the direction of the breaking current can be extended from unidirectional to bidirectional (it is possible to perform the blocking function of the bidirectional current).
- the power semiconductor switch 13 used in this configuration is configured to have a withstand voltage characteristic that is much lower than the rated voltage of the breaking device, in the embodiment of FIG.
- the number of power semiconductor devices having the characteristics can be reduced, resulting in a significant cost reduction.
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Abstract
Description
Claims (14)
- 사고 발생시 직류전류를 차단하기 위한 직류 전류 차단 장치에 있어서,정상동작 상태의 전류를 통전시키기 위한 주 통전로 상에 직렬로 연결되어 설치되는 3개의 고속 기계식 스위치를 포함하는 주 통전부와;상기 주 통전부에 소속된 고속 기계식 스위치 중 한 개의 기계식 스위치에 병렬로 연결된 1차 전류(轉流)회로 상에 설치되는 전력 반도체 스위치와;상기 주 통전로 중 두 개의 직렬 연결된 고속 기계식 스위치와 병렬로 연결된 회로인 2차 전류(轉流)회로 상에 설치되는 커패시터와;상기 주 통전로 중 두 개의 직렬 연결된 기계식 스위치와 병렬로 연결된 회로 상의 커패시터와 병렬로 연결된 회로인 3차 전류(轉流)회로 상에 설치되는 서지 어레스터;를 포함하는 것을 특징으로 하는 직류 전류 차단 장치.
- 청구항 1에 있어서,전력 반도체 스위치가 연결되는 1차 전류(轉流)회로와 병렬로 연결되는 주 통전회로의 기계식 스위치는 직렬 연결된 다른 두 개의 기계식 스위치 정격전압보다 낮은 정격 전압을 갖는 기계식 스위치를 설치하는 것을 특징으로 하는 직류 전류 차단 장치.
- 청구항 1에 있어서,상기 1차 전류(轉流)회로에 설치되는 전력 반도체 스위치는 상기 전력 반도체 스위치와 병렬로 연결된 기계식 스위치가 통전 상태에서 개극(Open) 시 아크전압보다 낮은 순방향 전압이 인가되게 함으로 주 통전부의 전류가 상기 전력 반도체 스위치로 전류(轉流)가 용이하게 이루어지게 하는 것을 특징으로 하는 직류 전류 차단 장치.
- 청구항 1에 있어서,상기 1차 전류(轉流)회로의 전력 반도체 스위치와 병렬로 연결되는 주 통전 회로의 기계식 스위치는 단안정(monostable) 스위치로서 직류전류(dc) 차단기의 트립(trip) 신호를 받아 개극동작을 시작하고 주 통전부 전류가 2차 전류(轉流)회로로 완전히 전류(轉流)된 시점 이후에는 자동으로 폐극(close) 상태로 복귀되는 기능을 가지는 것으로 개극 응답특성이 직렬로 연결된 다른 두 고속 스위치보다 빨라 아크전압의 상승이 신속히 일어나는 것을 특징으로 하는 직류 전류 차단 장치.
- 청구항 1에 있어서,상기 커패시터는 투입/분리 스위치의 후단에서 주 통전로로부터 분기된 회로상에 설치되는 것을 특징으로 하는 직류 전류 차단 장치.
- 청구항 1 또는 청구항 2에 있어서,상기 커패시터는 전력 반도체 스위치에 의해 주 통전로의 전류가 차단되는 시점에서 인가되는 과도 전압이 보호 스위치와 전류(轉流) 스위치에 분담될 때 전류(轉流) 스위치와 병렬로 연결되어 동일한 인가전압이 걸리는 전력 반도체 스위치의 내전압 한계치를 넘지 않도록 하는 정전 용량을 가지는 것을 특징으로 하는 직류 전류 차단 장치.
- 청구항 1에 있어서,투입/분리 스위치에 의해 최종적으로 직류 전류의 차단 동작이 종료된 후 상기 커패시터에 충전된 전압을 방전시키기 위한 방전부;를 더 포함하는 것을 특징으로 하는 직류 전류 차단 장치.
- 청구항 7에 있어서,상기 방전부는 커패시터가 설치된 회로와 병렬로 연결된 방전로 상에 서로 직렬로 연결되어 설치되는 방전 스위치와 방전저항을 포함하여 구성되는 것을 특징으로 하는 직류 전류 차단 장치.
- 청구항 1에 있어서,상기 제1 전류회로의 전력용 반도체 스위치는 1개의 단방향 도통 스위치로 형성되거나 또는 2개의 단방향 도통 스위치를 서로 역방향으로 직렬로 연결하고, 각 단방향 도통 스위치에 병렬로 프리휠링 다이오드를 접속하여 형성되는 것을 특징으로 하는 직류 전류 차단 장치.
- 사고 발생시 직류 전류를 차단하기 위한 직류 전류 차단 방법에 있어서,정상 동작 상태의 전류를 통전시키기 위한 주 통전로 상에 직렬로 연결되어 설치되는 세 개의 고속 기계식 스위치인 투입/분리 스위치, 보호 스위치 및 전류(轉流) 스위치를 포함하는 주 통전부와;상기 주 통전로의 전류(轉流) 스위치와 병렬로 연결된 회로 상의 전력 반도체 스위치와;상기 주 통전로와 병렬로 연결된 회로 상에 보호 스위치 및 전류(轉流) 스위치와 병렬로 접속되도록 설치되는 커패시터와;상기 주 통전로와 병렬로 연결된 회로 상에 커패시터와 병렬로 접속되도록 설치되는 서지 어레스터;를 포함하는 직류 전류 차단 장치를 이용하되, 상기 주 통전로의 세 개의 기계식 스위치 만를 통해 정상 전류가 흐르는 정상 동작 상태에서 트립(trip) 신호를 받게 되면 세 개의 고속 기계식 스위치를 오픈시키고, 이어 전류(轉流) 스위치의 전극 간 아크 발생 직후 이를 통해 흐르던 선로 전류가 1차 전류(轉流)회로에 설치된 전력 반도체 스위치로 전류(轉流)되도록 하고 보호 스위치의 극간 간격이 일정 이상 벌어지게 되면 전력 반도체 스위치를 턴 오프 시켜 주 통전로의 전류를 2차 전류(轉流) 회로로 변경되게 하여 커패시터를 충전시키며, 상기 커패시터의 충전 전압이 서지 어레스터의 방전 개시 전압까지 상승하면 3차 전류(轉流) 회로에 설치된 서지 어레스터가 방전을 시작하면서 선로 전류가 서지 어레스터를 통해 흐르게 되어 전류의 차단이 이루어지도록 하는 것을 특징으로 하는 직류 전류 차단 방법.
- 청구항 10에 있어서,상기 전력 반도체 스위치가 제어부의 제어신호에 따라 턴오프 되어 전력 반도체 스위치를 통해 흐르는 전류가 차단되는 시점은 아크가 발생되던 보호 스위치의 전극 간이 이후 발생되는 과도 전압에 대해 절연 회복을 할 수 있는 전극 간 거리가 확보될 때로 설정하는 것을 특징으로 하는 직류 전류 차단 방법.
- 청구항 10에 있어서,상기 투입/분리 스위치가 오픈된 후 커패시터에 충전된 전압을 방전시키기 위한 방전부를 동작시키는 것을 특징으로 하는 직류 전류 차단 방법.
- 청구항 11에 있어서,상기 방전부는 커패시터가 설치된 회로와 병렬로 연결된 방전로 상에 서로 직렬로 연결되어 설치되는 방전 스위치와 방전저항을 포함하여 구성되고, 방전로를 통해 커패시터에 충전된 전압이 방전되도록 방전 스위치를 폐극한 후 개극시키는 것을 특징으로 하는 직류 전류 차단 방법.
- 청구항 10에 있어서,상기 주 통전부의 보호 스위치를 먼저 폐극시킨 후 상기 투입/분리 스위치를폐극시켜 직류전류(dc) 차단 장치의 투입하는 것을 특징으로 하는 직류 전류 차단 방법.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15/027,744 US10096989B2 (en) | 2013-10-07 | 2014-09-05 | High-voltage DC current breaker and high-voltage DC current breaking method |
| JP2016521297A JP6250153B2 (ja) | 2013-10-07 | 2014-09-05 | 高圧直流電流遮断装置及び方法 |
| EP14852914.2A EP3057117B1 (en) | 2013-10-07 | 2014-09-05 | Device and method for blocking high voltage direct current |
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| Application Number | Priority Date | Filing Date | Title |
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| KR10-2013-0119060 | 2013-10-07 | ||
| KR1020130119060A KR101521545B1 (ko) | 2013-10-07 | 2013-10-07 | 고압 직류 전류 차단 장치 및 방법 |
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| WO2015053484A1 true WO2015053484A1 (ko) | 2015-04-16 |
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| Country | Link |
|---|---|
| US (1) | US10096989B2 (ko) |
| EP (1) | EP3057117B1 (ko) |
| JP (1) | JP6250153B2 (ko) |
| KR (1) | KR101521545B1 (ko) |
| WO (1) | WO2015053484A1 (ko) |
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| US10777374B2 (en) | 2015-09-04 | 2020-09-15 | Sony Corporation | Switching device, movable body, power supply system and switching method |
| CN107710369A (zh) * | 2015-09-16 | 2018-02-16 | 三菱电机株式会社 | 电路断路器 |
| EP3352193A4 (en) * | 2015-09-16 | 2018-09-26 | Mitsubishi Electric Corporation | Circuit breaker |
| CN107710369B (zh) * | 2015-09-16 | 2019-06-18 | 三菱电机株式会社 | 电路断路器 |
| GB2542789A (en) * | 2015-09-29 | 2017-04-05 | Alstom Technology Ltd | Fault protection for voltage source converters |
| CN105609344B (zh) * | 2016-03-22 | 2019-06-11 | 国网天津市电力公司 | 一种混合式直流断路器拓扑结构 |
| EP3229252A1 (en) * | 2016-04-04 | 2017-10-11 | LSIS Co., Ltd. | Current circuit breaker |
| JP2017188423A (ja) * | 2016-04-04 | 2017-10-12 | エルエス産電株式会社Lsis Co., Ltd. | 電流遮断器 |
| CN107276020A (zh) * | 2016-04-04 | 2017-10-20 | Ls 产电株式会社 | 电流断路器 |
| US10447024B2 (en) | 2016-04-04 | 2019-10-15 | Lsis Co., Ltd. | Current circuit breaker |
| CN107276020B (zh) * | 2016-04-04 | 2019-11-01 | Ls 产电株式会社 | 电流断路器 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3057117B1 (en) | 2018-07-25 |
| EP3057117A1 (en) | 2016-08-17 |
| US20160285250A1 (en) | 2016-09-29 |
| JP6250153B2 (ja) | 2017-12-20 |
| JP2016541088A (ja) | 2016-12-28 |
| KR20150040490A (ko) | 2015-04-15 |
| US10096989B2 (en) | 2018-10-09 |
| EP3057117A4 (en) | 2016-10-19 |
| KR101521545B1 (ko) | 2015-05-19 |
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