WO2024105743A1 - Dispositif de disjoncteur, dispositif de commande, procédé de suppression de courant d'appel et programme - Google Patents

Dispositif de disjoncteur, dispositif de commande, procédé de suppression de courant d'appel et programme Download PDF

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Publication number
WO2024105743A1
WO2024105743A1 PCT/JP2022/042279 JP2022042279W WO2024105743A1 WO 2024105743 A1 WO2024105743 A1 WO 2024105743A1 JP 2022042279 W JP2022042279 W JP 2022042279W WO 2024105743 A1 WO2024105743 A1 WO 2024105743A1
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WO
WIPO (PCT)
Prior art keywords
circuit breaker
inrush current
unit
power line
current
Prior art date
Application number
PCT/JP2022/042279
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English (en)
Japanese (ja)
Inventor
直樹 花岡
徹 田中
裕二 樋口
尚倫 中村
Original Assignee
日本電信電話株式会社
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Publication date
Application filed by 日本電信電話株式会社 filed Critical 日本電信電話株式会社
Priority to PCT/JP2022/042279 priority Critical patent/WO2024105743A1/fr
Publication of WO2024105743A1 publication Critical patent/WO2024105743A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H81/00—Protective switches in which contacts are normally closed but are repeatedly opened and reclosed as long as a condition causing excess current persists, e.g. for current limiting
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks

Definitions

  • the present invention relates to technology for suppressing inrush current in a power supply system.
  • Inrush current can cause problems such as breakdowns in the power supply circuit, so it is necessary to suppress inrush current.
  • the present invention was made in consideration of the above points, and aims to provide a technology for suppressing inrush current without providing an inrush current suppression circuit on the load device side.
  • a power supply circuit includes: a breaker that breaks and connects a power line that connects a DC power supply and a load device; and a control unit that controls the interrupter to repeatedly interrupt and connect the power line when an occurrence of an inrush current is detected.
  • the disclosed technology provides a technology that makes it possible to suppress inrush current without providing an inrush current suppression circuit on the load device side.
  • FIG. 1 is a configuration diagram of a power supply system.
  • FIG. 4 is a diagram showing the waveform of an inrush current.
  • FIG. 4 is a diagram showing the waveform of an inrush current.
  • FIG. 1 illustrates an example of a microgrid.
  • FIG. 1 is a diagram illustrating an example in which consumers are connected to a bus in a microgrid.
  • FIG. 2 is a diagram illustrating an example of the configuration of a circuit breaker.
  • FIG. 2 is a diagram illustrating an example of the configuration of a circuit breaker.
  • 4 is a flowchart of an inrush current suppression process.
  • FIG. 13 is a diagram showing an example of waveforms when the ON time is gradually increased.
  • FIG. 2 is a configuration diagram of a system including a control device 200.
  • FIG. 2 is a functional configuration diagram of a control device 200.
  • FIG. 2 is a diagram illustrating an example of a hardware configuration of a control device 200.
  • turning off a circuit breaker means interrupting the electric circuit (path of current). Turning off a circuit breaker may also be expressed as opening the circuit breaker. Interrupting an electric circuit may also be expressed as opening the electric circuit, interrupting the current, interrupting the power line, etc.
  • Turning a circuit breaker ON means connecting the electrical circuit. Turning a circuit breaker ON can also be expressed as “closing the circuit breaker.” Connecting the electrical circuit can also be expressed as “connecting the power line,” “closing the electrical circuit,” etc.
  • the power supply system described below is a DC power supply system.
  • the technology according to the present invention is not limited to DC power supply systems and can be applied to other systems.
  • the communication lines (which may be called networks) used in the following description are not limited to a specific type, but may be, for example, metal wires, optical fibers, or radio waves.
  • FIG. 1 A basic configuration of a power supply system according to the present embodiment is shown in Fig. 1.
  • a DC power source 10 and a load device 20 are connected by a power line, and a circuit breaker 100 is provided on the power line.
  • the circuit breaker may also be called a circuit breaker.
  • the load device 20 includes a power supply circuit 30 (DC/DC converter) and a capacitor 40 (called an X capacitor).
  • the capacitor 40 is provided within the load device 20, but this is an example.
  • the capacitor 40 may be provided anywhere between the positive power line and the negative power line in the power supply system.
  • the circuit breaker 100 includes a circuit breaker section for opening and closing (cutting (OFF) and connecting (ON)) the power line.
  • the circuit breaker section may be mechanical, semiconductor, electromagnetic, or of another type. However, in this embodiment, it is assumed that a semiconductor circuit breaker section is used.
  • a circuit breaker using a semiconductor circuit breaker section may be called a semiconductor circuit breaker.
  • a specific example of the configuration of the circuit breaker 100 will be described later.
  • the power supply system shown in FIG. 1 is assumed to be used in, for example, a microgrid.
  • the DC power source 10 is provided on the bus side, and the load device 20 is provided on the consumer side.
  • FIG. 1 describes the "bus side” and the "consumer side.”
  • an inrush current of, for example, several hundred amperes flows toward the capacitor 40 of the load device 20.
  • the inrush current may cause the power supply circuit to stop or become damaged.
  • An example of the waveform of the inrush current is shown in FIG. 2.
  • the circuit breaker 100 when the circuit breaker 100 detects a signal indicating an event that generates an inrush current (a signal indicating the start of an inrush current), the circuit breaker 100 turns the circuit breaker unit on and off multiple times.
  • the current waveform in this case is shown in Figure 3. Note that when the circuit breaker 100 detects that the magnitude of the current flowing through the power line has exceeded a threshold value, it may determine that an inrush current has been detected and turn the circuit breaker unit on and off multiple times.
  • the capacitor 40 can be charged intermittently. As the capacitor 40 is charged (accumulated), the voltage of the capacitor 40 increases and the current flowing through the power line decreases. Figure 3 shows that the peak current decreases each time the circuit breaker is turned on.
  • the "ON time” is the length of time that the circuit breaker is ON
  • the "OFF time” is the length of time that the circuit breaker is OFF.
  • the ON time and OFF time are not limited to a specific time length, but may be, for example, a time length of about several ns to several ms.
  • a time length of about several ns to several ms is, for example, a time length in the range of 1 ns to 10 ms.
  • the OFF time may be longer than the ON time.
  • the OFF time may be, for example, about several seconds.
  • a time length of about several seconds is, for example, a time length in the range of 1 s to 10 s.
  • the power supply system according to the present embodiment can be applied to, for example, a microgrid.
  • the microgrid has a configuration in which consumers are connected to a ring-shaped power line (called a bus) via a power line.
  • the microgrid is also provided with a plurality of circuit breakers.
  • consumers such as loads, storage batteries, and renewable energy power generation devices.
  • FIG. 5 is a diagram showing some of the consumers connected to the bus from the entire microgrid.
  • a circuit breaker 100 according to this embodiment is inserted between the microgrid bus and consumer A.
  • Consumer A is equipped with the load device 20 shown in FIG. 1, but FIG. 5 shows a power supply circuit 30.
  • the microgrid bus is in a voltage state, which corresponds to a state in which the DC power supply 10 shown in FIG. 1 is ON.
  • a Molded Case Circuit Breaker (MCCB) 50 is provided between the microgrid bus and the circuit breaker 100, and the circuit breaker 100 and the MCCB 50 are connected by a communication line. Note that the MCCB 50 may not be provided.
  • the microgrid bus is in a voltage-applied state. Therefore, if the technology of the present invention is not used, when a new consumer A (specifically, load device 20) is connected to the microgrid, if the circuit breaker 100 is turned from OFF to ON, or if the MCCB 50 is turned from OFF to ON while the circuit breaker 100 is ON, a large inrush current will flow from the bus to consumer A, which may cause the power supply circuit 30 (specifically, the DC/CD converter) of the load device 20 to stop. Furthermore, the inrush current may cause a voltage fluctuation on the microgrid bus, which may also cause the power supply circuit of another consumer B connected to the bus to stop.
  • the power supply circuit 30 specifically, the DC/CD converter
  • the technology according to this embodiment makes it possible to suppress the above-mentioned inrush current. In other words, it is possible to reduce the magnitude of the inrush current.
  • a new consumer A (specifically, load device 20) is connected to the microgrid
  • a signal indicating that the MCCB 50 has been turned ON is sent to the circuit breaker 100 via the communication line.
  • the circuit breaker 100 After receiving the above signal, when the circuit breaker 100 detects that a current greater than or equal to a predetermined threshold has flowed through the circuit breaker 100, it continuously turns the circuit breaker unit ON/OFF as described above to charge the capacitor 40 in stages and suppress the inrush current. Note that after receiving the above signal, the circuit breaker 100 may start control to continuously turn the circuit breaker unit ON/OFF without performing a process to detect that a current greater than or equal to a predetermined threshold has flowed through the circuit breaker 100.
  • the functional unit After receiving the signal, if the functional unit detects that a current greater than or equal to a predetermined threshold has flowed through the circuit breaker 100, it will continuously turn the circuit breaker ON/OFF as described above to charge the capacitor 40 in stages and suppress the inrush current.
  • the state in which the circuit breaker is repeatedly turned ON/OFF may be called the "inrush current suppression mode.”
  • the functional unit may start control to charge the capacitor 40 in stages by continuously turning the circuit breaker ON/OFF, without performing a process to detect that a current greater than or equal to a predetermined threshold has flowed through the circuit breaker 100.
  • the circuit breaker 100 when the MCCB is ON and the circuit breaker 100 receives an ON signal indicating that the power supply circuit 30 of consumer A is ON, the circuit breaker 100 goes into inrush current suppression mode for a certain period of time. In the inrush current suppression mode, the circuit breaker 100 repeatedly turns ON and OFF in a short period of time to suppress the inrush current.
  • the circuit breaker 100 detects that the peak magnitude of the inrush current has fallen below a threshold while repeatedly turning the circuit breaker unit on and off, it stops the on/off control and maintains the on state.
  • the following examples 1 and 2 are examples of operations for preventing other circuit breakers 60 from erroneously operating due to the inrush current suppression operation by the circuit breaker 100.
  • the circuit breaker 100 and the other circuit breakers 60 are connected by a communication line.
  • the circuit breaker 100 When starting the operation of suppressing the inrush current, the circuit breaker 100 notifies the other circuit breaker 60 of a signal indicating the start of the operation of suppressing the inrush current. Upon receiving the signal, the other circuit breaker 60 controls the circuit breaker 60 to continue in the ON state.
  • the circuit breaker 100 When the circuit breaker 100 ends the inrush current suppression operation, it notifies the other circuit breaker 60 of the end of the inrush current suppression operation. Upon receiving the signal, the other circuit breaker 60 ends the control to keep the circuit breaker 60 in the ON state and returns to the normal state.
  • Example 2 When the circuit breaker 100 starts the operation of suppressing the inrush current, it notifies the other circuit breaker 60 of a signal indicating the start of the operation of suppressing the inrush current. Upon receiving the signal, the other circuit breaker 60 controls the circuit breaker 60 to continue the ON state for a predetermined time. When this time has elapsed, the circuit breaker 60 ends the control to continue the ON state and returns to the normal state.
  • Example of circuit breaker configuration shows an example of the configuration of the circuit breaker 100 according to the present embodiment.
  • the circuit breaker 100 described here can also be used as another circuit breaker in a microgrid.
  • the circuit breaker 100 in this embodiment has a circuit breaker unit 110, a current detection unit 120, a circuit breaker unit 130, and a control unit 140. Both circuit breakers 110 and 130 turn the current on/off (open/close) in accordance with a control signal from control unit 140 that is based on the current value measured using current detection unit 120.
  • the "circuit breaker” may also be called a “circuit breaker device.”
  • the "circuit breaker unit 110 and circuit breaker unit 130" may also be called a “circuit breaker unit.”
  • the interrupter unit 110 interrupts current in one direction, and the interrupter unit 130 interrupts current in the opposite direction.
  • the control unit 140 performs signal detection, ON/OFF control, threshold determination, and the like to suppress inrush current. In addition, as a normal operation, the control unit 140 transmits a control signal to instruct the interrupter unit 310/interrupter unit 330 to turn ON/OFF based on the current value measured using the current detection unit 120 and the set setting value.
  • FIG. 7 shows a specific example of the configuration of the circuit breaker 100.
  • the circuit breaker 110 includes a capacitor 111, a transistor 112, and a diode 113.
  • the current detection unit 120 includes a current sensor 121.
  • the circuit breaker 130 includes a diode 131, a transistor 132, and a capacitor 133.
  • Transistors 112 and 132 are, for example, MOSFETs.
  • Current sensor 121 is, for example, a Hall element or a shunt resistor. Note that the use of capacitors/diodes in the locations indicated by 111, 113, 131, and 133 is one example.
  • the control unit 140 has a measurement unit 141, a calculation unit 142, a control processing unit 143, and a communication unit 144.
  • the measurement unit 141, the calculation unit 142, the control processing unit 143, and the communication unit 144 may all be realized by a hardware circuit, or may be realized by having a computer consisting of a CPU and memory execute a program. Note that the communication unit 144 may not be provided.
  • the measurement unit 141 measures the current value based on the signal obtained from the current detection unit 120.
  • the calculation unit 142 determines, for example, based on the current value and the set value, whether or not to send a control signal to instruct the cutoff unit 310/cutoff unit 330 to cut off.
  • the calculation unit 142 also executes threshold determination and the like in the flow described below.
  • the calculation unit 142 also instructs the control processing unit 143 to perform ON/OFF control operations.
  • the control processing unit 143 transmits a control signal instructing ON/OFF to the interrupting unit 110/interrupting unit 130 based on instructions from the calculation unit 142.
  • the communication unit 144 communicates with the control device 100 described below, and between the circuit breakers.
  • the control processing unit 143 and the calculation unit 142 may be integrated into a single functional unit. This single functional unit may be called a control unit or a control processing unit.
  • basic data required for subsequent calculations is input to the control unit 140 of the circuit breaker 100.
  • the input basic data is stored, for example, in a data storage unit (memory, etc.) in the control unit 140.
  • the basic data is, for example, the ON time and OFF time of the inrush current mode, and the threshold value of the current magnitude for transitioning to the current continuation mode (a mode in which the ON state continues, a normal mode), etc.
  • the control unit 140 waits (monitors a signal).
  • the calculation unit 142 in the control unit 140 detects a signal indicating an event that will cause an inrush current (Yes in S3), the process proceeds to S4.
  • a "signal indicating an event that will cause an inrush current” is, for example, a signal indicating that the MCCB 50 has been turned ON, a signal indicating that the power circuit of the load device connected to the circuit breaker 100 has been turned ON, or a signal indicating that the circuit breaker has been turned ON.
  • the "signal indicating an event that generates an inrush current” may also be a “signal indicating that a current greater than or equal to a threshold has been detected to flow through the circuit breaker 100.”
  • the circuit breaker 100 transitions to the inrush current mode.
  • the calculation unit 142 notifies the control processing unit 143 of, for example, the specified ON time and OFF time.
  • the control processing unit 143 executes ON/OFF control by transmitting a control signal to the circuit breaker units 110/130 according to the notified ON time and OFF time.
  • the measurement unit 141 uses the current detection unit 120 to measure the current flowing through the power line. The current measurement result is notified to the calculation unit 142.
  • the calculation unit 142 detects that the magnitude of the peak current is equal to or less than the threshold value (or is less than the threshold value) (Yes in S5), it proceeds to S6.
  • the circuit breaker 100 (specifically, the calculation unit 142) stops repeating ON/OFF and switches the mode to the current continuation mode.
  • the control processing unit 143 controls the circuit breaker units 110/130 to maintain the ON state, for example, until a stop signal is received (S6, S7).
  • circuit breaker 100 If a short circuit occurs and the circuit breaker 100 detects a large current while the ON state is maintained, the circuit breaker 100 will turn OFF.
  • the ON time and the OFF time may each be a predetermined length or may be variable.
  • the ON time and the OFF time may each be a predetermined length or may be variable.
  • an example of a case where they are variable will be described.
  • control in which the ON time is gradually lengthened is shown, but control in which the ON time is gradually shortened may also be performed.
  • gradually lengthening the ON time means, for example, making the length of the ON time for the n+1th (an integer equal to or greater than n1) ON/OFF cycle longer than the length of the ON time for the nth cycle.
  • Figure 9 shows an example of the waveform of the current flowing through the interrupter when the control unit 140 detects an event that generates an inrush current and performs control to gradually lengthen the ON time.
  • the control unit 140 when it detects that the current value detected by the current detection unit 120 has reached a threshold value, it notifies the breaker unit of a signal (OFF signal) to turn off the breaker unit. If the peak current value of the waveform shown in FIG. 9 is X, the threshold value is Y, which is lower than X. The reason for this control is that there is a time lag between sending the OFF signal and the breaker unit turning OFF.
  • the control unit 140 After sending the OFF signal, the control unit 140 turns the interrupter ON again, for example after a predetermined OFF time has elapsed, and when it detects that the current value has reached the threshold value (Y), it sends an OFF signal to the interrupter to turn it OFF.
  • the cutoff unit can be transitioned from inrush current mode (a mode that turns ON/OFF) to continuous current mode (a mode that is always ON) in a shorter time than with control that keeps the ON time constant.
  • the circuit breaker 100 itself determines whether to switch to the inrush current mode and performs ON/OFF control in the inrush current mode, but this is not limited to this.
  • a control device 200 connected to the circuit breaker 100 via a communication line may instruct the circuit breaker 100 to switch to the inrush current mode based on information acquired from the circuit breaker 100.
  • Fig. 11 shows a configuration example of the control device 200 in the modified example.
  • the control device 200 includes an information acquisition unit 210, a calculation unit 220, an output unit 230, and a data storage unit 240. The operation of the control device 200 including these functional units will be described later.
  • the "calculation unit 220 and the output unit 230" may be referred to as a "control unit.”
  • the control device 200 can be realized, for example, by having a computer execute a program.
  • This computer may be a physical computer or a virtual machine on the cloud.
  • control device 200 can be realized by executing a program corresponding to the processing performed by the control device 200 using hardware resources such as a CPU and memory built into the computer.
  • the above program can be recorded on a computer-readable recording medium (such as a portable memory) and stored or distributed.
  • the above program can also be provided via a network such as the Internet or email.
  • FIG. 12 is a diagram showing an example of the hardware configuration of the computer.
  • the computer in FIG. 12 has a drive device 1000, an auxiliary storage device 1002, a memory device 1003, a CPU 1004, an interface device 1005, a display device 1006, an input device 1007, an output device 1008, etc., all of which are interconnected by a bus BS.
  • the computer may further include a GPU.
  • the program that realizes the processing on the computer is provided by a recording medium 1001, such as a CD-ROM or a memory card.
  • a recording medium 1001 storing the program is set in the drive device 1000, the program is installed from the recording medium 1001 via the drive device 1000 into the auxiliary storage device 1002.
  • the program does not necessarily have to be installed from the recording medium 1001, but may be downloaded from another computer via a network.
  • the auxiliary storage device 1002 stores the installed program as well as necessary files, data, etc.
  • the memory device 1003 When an instruction to start a program is received, the memory device 1003 reads out and stores the program from the auxiliary storage device 1002.
  • the CPU 1004 realizes functions related to the control device 200 in accordance with the program stored in the memory device 1003.
  • the interface device 1005 is used as an interface for connecting to a network, etc.
  • the display device 1006 displays a GUI (Graphical User Interface) or the like according to a program.
  • the input device 1007 is composed of a keyboard and mouse, buttons, a touch panel, etc., and is used to input various operational instructions.
  • the output device 1008 outputs the results of calculations.
  • the input basic data is stored in the data storage unit 240.
  • the basic data includes, for example, the ON time and OFF time of the inrush current mode, and the threshold value of the current magnitude for transitioning to the current continuation mode (a mode in which the ON state continues, a normal mode).
  • the control device 200 waits (monitors a signal).
  • the calculation unit 220 in the control device 200 detects a signal indicating an event that will cause an inrush current (Yes in S3), the calculation unit 220 proceeds to S4.
  • the "signal indicating an event that will cause an inrush current" is as described above.
  • the above signal may be detected by the circuit breaker 100 and transmitted from the circuit breaker 100 to the control device 200, or may be transmitted from the MCCB 50 or the load device to the control device 200.
  • the information acquisition unit 210 receives the above signal and passes it to the calculation unit 220.
  • the calculation unit 220 of the control device 200 decides to switch the mode of the circuit breaker 100 to the inrush current mode, and transmits a signal instructing the circuit breaker 100 to switch the mode to the inrush current mode from the output unit 230.
  • the control device 200 also transmits the ON time and the OFF time to the circuit breaker 100 along with the signal instructing the circuit breaker 100 to switch the mode to the inrush current mode.
  • control processing unit 143 executes ON/OFF control by sending control signals to the circuit breaker units 110/130 according to the notified ON and OFF times.
  • the measurement unit 141 of the circuit breaker 100 uses the current detection unit 120 to measure the current flowing through the power line, and the communication unit 144 transmits the measurement result to the control device 200.
  • the control device 200 transmits a signal to the circuit breaker 100 to switch the mode to the current continuation mode.
  • the circuit breaker 100 which receives the signal, switches to the current continuation mode.
  • the control processing unit 143 of the circuit breaker 100 controls the circuit breaker units 110/130 to maintain the ON state, for example, until a stop signal is received (S6, S7).
  • the technique described in this embodiment makes it possible to suppress inrush current without providing an inrush current suppression circuit on the load device side.
  • the technology described in this embodiment makes it possible to realize inrush current suppression while simplifying the circuit to reduce costs, reducing the number of parts, and making the device smaller in volume. Furthermore, compared to the prior art where an inrush current suppression circuit is provided, the resistance components can be reduced, and constant power loss can be reduced. Furthermore, it is possible to prevent the DC/DC converter from shutting down due to an overvoltage caused by the inrush current.
  • Additional Notes a breaker unit that breaks and connects a power line connecting a DC power source and a load device; a control unit that controls the interrupter to repeatedly interrupt and connect the power line when an occurrence of an inrush current is detected.
  • the control unit is determining that an inrush current has occurred when a signal indicating an event that generates an inrush current is received; or When the magnitude of the current flowing through the power line becomes equal to or greater than a threshold, it is determined that an inrush current has occurred.
  • the interrupter device according to claim 1.
  • the interrupting device according to claim 1 or 2 wherein the control unit controls the interrupting unit to repeatedly perform interruption and connection during an OFF time and an ON time.
  • a method for suppressing inrush current performed by a breaker provided between a DC power source and a load device connected by a power line comprising: Detecting an occurrence of an inrush current; and repeatedly disconnecting and connecting the power line.
  • a non-transitory storage medium storing a program for causing a computer to function as each unit in the control device described in appended claim 5.

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  • Power Engineering (AREA)
  • Direct Current Feeding And Distribution (AREA)

Abstract

La présente invention porte sur un dispositif de disjoncteur qui comprend : une unité de disjoncteur qui rompt et connecte une ligne d'alimentation avec laquelle une source d'alimentation CC et un dispositif de charge sont connectés ; et une unité de commande qui, si un courant d'appel est détecté, commande l'unité de disjoncteur de façon à rompre et à connecter de manière répétée la ligne d'alimentation.
PCT/JP2022/042279 2022-11-14 2022-11-14 Dispositif de disjoncteur, dispositif de commande, procédé de suppression de courant d'appel et programme WO2024105743A1 (fr)

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PCT/JP2022/042279 WO2024105743A1 (fr) 2022-11-14 2022-11-14 Dispositif de disjoncteur, dispositif de commande, procédé de suppression de courant d'appel et programme

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PCT/JP2022/042279 WO2024105743A1 (fr) 2022-11-14 2022-11-14 Dispositif de disjoncteur, dispositif de commande, procédé de suppression de courant d'appel et programme

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