WO2020144815A1 - Procédé de commande de conditionneur d'énergie et dispositif onduleur d'interconnexion de système - Google Patents

Procédé de commande de conditionneur d'énergie et dispositif onduleur d'interconnexion de système Download PDF

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Publication number
WO2020144815A1
WO2020144815A1 PCT/JP2019/000547 JP2019000547W WO2020144815A1 WO 2020144815 A1 WO2020144815 A1 WO 2020144815A1 JP 2019000547 W JP2019000547 W JP 2019000547W WO 2020144815 A1 WO2020144815 A1 WO 2020144815A1
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WO
WIPO (PCT)
Prior art keywords
power
grid
inverter device
commercial
power conditioner
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Application number
PCT/JP2019/000547
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English (en)
Japanese (ja)
Inventor
義彦 小道
中林　弘一
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三菱電機株式会社
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Publication date
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Priority to PCT/JP2019/000547 priority Critical patent/WO2020144815A1/fr
Publication of WO2020144815A1 publication Critical patent/WO2020144815A1/fr

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    • 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
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal

Definitions

  • the present invention relates to a power conditioner that can supply electric power supplied from a storage battery mounted on an electric vehicle or the like to an electric load device, and a method for controlling a grid interconnection inverter device.
  • V2H Vehicle to Home
  • storage battery an electric load device
  • the DC power generated by the solar cell is converted into AC power by the grid-connected inverter device that is connected to the commercial grid.
  • a power conditioner for an electric vehicle is used to charge a storage battery with surplus power of the converted AC power or to supply electric power charged with the storage battery to an electric load device.
  • a power conditioner for an electric vehicle is a power conversion device including a power converter, a filter circuit, a control circuit, an auxiliary battery, and the like.
  • the power conditioner for an electric vehicle is abbreviated as "power conditioner” as appropriate.
  • the control circuit can be operated by using the auxiliary battery built in the electric vehicle power conditioner as a power source, even if the commercial system is cut off due to a natural disaster or the like.
  • the DC voltage supplied from the storage battery is converted into an AC voltage and supplied to the grid-connected inverter apparatus, so that the grid-connected inverter apparatus can be operated in the same manner as when there is no power failure.
  • the electric power generated by the solar cell can be used to supply electric power to household electrical load devices even during a power failure of the commercial system, and the electric power generated by the solar cell can be secured. It will be possible.
  • the power from the electric vehicle power conditioner and the grid interconnection inverter device is prevented from being continuously supplied to the accident point, which is the point where the accident occurred.
  • the automotive power conditioner opens a switch provided between the grid interconnection inverter device and the commercial grid. As a result, the grid interconnection inverter device is disconnected from the commercial grid.
  • the grid-connected inverter device is operated independently so that the grid-connected inverter device can be prevented from continuing to supply power to the accident point when the commercial power system fails. It describes the requirements for implementing prevention functions. More specifically, the grid-connected inverter device is required to have an islanding operation detection function that combines a passive system and an active system so as not to be in an islanding state mainly from the viewpoint of security. Has been done.
  • the isolated operation state means a state in which the system continues to operate in a state where the power generation equipment or the like is not disconnected from the grid when the grid is stopped.
  • the grid-connected inverter device when the grid-connected inverter device is operated by the power conditioner during a power failure of the commercial grid, the grid-connected inverter device uses the AC voltage generated by the power conditioner for commercial operation.
  • the voltage output from the grid in other words, is regarded as the voltage simulating the commercial grid, and the interconnection operation is performed.
  • the filter circuit, etc., provided in the power conditioner with the minimum necessary in order to reduce costs. Therefore, the quality of the AC voltage generated by the power conditioner is lower than that of the AC voltage generated by the commercial system.
  • the grid interconnection inverter device outputs reactive power so as to promote the frequency change due to the frequency fluctuation of the degraded voltage, and the operation is stopped by the islanding detection function of the islanding prevention function. There was something. Further, since the specifications of the islanding operation detection function of the grid interconnection inverter device differ depending on the product, even a slight harmonic component or a slight frequency variation may be detected and promoted.
  • the conventional V2H system has a problem that the grid-connected inverter device may stop operating due to the deteriorated AC voltage output from the power conditioner.
  • the present invention has been made in view of the above, and provides a power conditioner capable of suppressing the operation stop of the grid interconnection inverter device that may occur due to the quality of the AC voltage output from the power conditioner.
  • the purpose is to get.
  • the present invention is a power conditioner that exchanges electric power with a grid-connected inverter device that is connected to a commercial grid.
  • the power conditioner includes a bidirectional power converter that mutually converts DC power supplied from an external DC power supply and AC power supplied from the commercial grid side, a power converter, a grid interconnection inverter device, and a commercial grid.
  • a first switch that electrically opens and closes between the commercial system
  • a second switch that electrically opens and closes between the power converter and the interconnecting point.
  • Switch and communication means for enabling communication between the power conditioner and the grid interconnection inverter device.
  • the power conditioner electrically opens the first switch, disables the islanding prevention function of the system interconnection inverter device, and then shifts to the self-sustained operation mode.
  • the power conditioner of the present invention it is possible to prevent the operation stop of the grid interconnection inverter device that may occur due to the quality of the AC voltage output from the power conditioner.
  • FIG. 3 is a block diagram showing another example of the hardware configuration for realizing the function of the control circuit according to the first and second embodiments.
  • FIG. 1 is a configuration diagram of a grid interconnection system including a power conditioner 1 according to the first embodiment.
  • the components of the power conditioner 1 according to the first embodiment are shown together with the external components connected to the power conditioner 1.
  • the power conditioner 1 includes a power converter 2, a system disconnection switch 9 that is a first switch, and an interconnection system that is a second switch. It includes a relay 10 and a control circuit 11 as a control means. Further, the power conditioner 1 includes a power supply circuit 12, a secondary battery opening circuit breaker 13, a secondary battery 14 that is an auxiliary battery, a communication circuit 15 that is a communication unit, and a communication cable 16.
  • An electric vehicle 3, an operation monitor 6, a commercial grid 5, a grid-connected inverter device 7, and an electric load device 8 are connected to the power conditioner 1.
  • the electric vehicle 3 includes a storage battery 30.
  • the power conditioner 1 exchanges electric power with the commercial system 5, the system interconnection inverter device 7, and the storage battery 30. Further, the power conditioner 1 supplies electric power to the electric load device 8.
  • the electric vehicle 3 is an example of an external DC power supply and is not limited to this. Instead of the electric vehicle 3, a stationary storage battery may be used.
  • the system interconnection inverter device 7 is a power conversion device that is connected to the commercial system 5.
  • the solar cell panel 4 is connected to the grid interconnection inverter device 7.
  • the solar cell panel 4 may be a single solar cell string or a single solar cell string.
  • the solar cell panel 4 may be any power supply device or power supply system connected to the grid interconnection inverter device 7, and may be other than the solar cell panel.
  • the communication circuit 15 and the communication cable 16 enable communication between the power conditioner 1 and the grid interconnection inverter device 7.
  • the power conditioner 1 uses the communication circuit 15 to perform required communication with the grid interconnection inverter device 7.
  • FIG. 1 illustrates a configuration in which the communication circuit 15 and the grid interconnection inverter device 7 are connected by the communication cable 16, the configuration is not limited to this.
  • the communication circuit 15 and the grid interconnection inverter device 7 may be connected via another device, or may be connected by wireless communication means.
  • the power converter 2 includes a DC/DC converter 20, a DC/AC converter 21, and a gate drive circuit 22.
  • the DC/DC converter 20 converts the first DC power supplied from the storage battery 30 included in the electric vehicle 3 into the second DC power and supplies the second DC power to the DC/AC converter 21. Further, the DC/DC converter 20 converts the second DC power supplied from the DC/AC converter 21 into the first DC power and supplies the first DC power to the storage battery 30. That is, the DC/DC converter 20 is a bidirectional DC/DC converter that mutually converts the first DC power and the second DC power. Generally, the second DC power is higher in DC voltage than the first DC power, but the voltage of the first DC power and the voltage of the second DC power are the same. Alternatively, the first DC power may have a higher voltage than the second DC power.
  • the DC/AC converter 21 converts the second DC power supplied from the DC/DC converter 20 into AC power and outputs the AC power to the interconnection relay 10 side. Further, the DC/AC converter 21 converts the AC power supplied from the interconnection relay 10 side into second DC power and supplies the second DC power to the DC/DC converter 20. That is, the DC/AC converter 21 is a bidirectional DC/AC converter that mutually converts the second DC power and the AC power.
  • the interconnection relay 10 side may be restated as the commercial system 5 side or the system interconnection inverter device 7 side.
  • the control circuit 11 generates a control signal for controlling a switching element (not shown) included in the DC/DC converter 20 and the DC/AC converter 21, and outputs the control signal to the gate drive circuit 22.
  • the gate drive circuit 22 generates a drive signal based on the control signal to drive each switching element.
  • the power converter 2 Since each of the DC/DC converter 20 and the DC/AC converter 21 is a bidirectional power converter, the power converter 2 also operates as a bidirectional power converter. When viewed as a whole of the power converter 2, the power converter 2 converts the first DC power supplied from the storage battery 30 into AC power and outputs the AC power to the interconnection relay 10 side. Further, the power converter 2 converts the AC power supplied from the interconnection relay 10 side into the first DC power and supplies the first DC power to the storage battery 30. That is, the power converter 2 is a bidirectional power converter that mutually converts the DC power supplied from the storage battery 30 and the AC power supplied from the commercial grid 5 side or the grid interconnection inverter device 7 side. ..
  • each of the power converter 2, the grid-connected inverter device 7, the commercial grid 5, and the electric load device 8 is electrically connected to a grid point 17. That is, the interconnection point 17 is a connection point to which the power converter 2, the grid interconnection inverter device 7, the commercial grid 5, and the electric load device 8 are electrically connected.
  • a switch 9 for disconnecting the system is provided between the interconnection point 17 and the commercial system 5. Further, an interconnection relay 10 is provided between the interconnection point 17 and the power converter 2. That is, in the configuration of FIG. 1, between the commercial grid 5 and the grid point 17 to which the power converter 2, the grid-connected inverter device 7, the commercial grid 5, and the electric load device 8 are electrically connected, respectively. It is configured to be electrically connected via a system disconnecting switch 9, and the power converter 2 and the interconnection point 17 are electrically connected by an interconnection relay 10.
  • the control circuit 11 controls the opening/closing operations of the system disconnecting switch 9 and the interconnection relay 10.
  • the system disconnection switch 9 opens and closes the electrical connection between the commercial system 5 and the interconnection point 17. Specifically, when the system disconnection switch 9 is controlled to be closed, the commercial system 5 and the interconnection point 17 are electrically connected. When the system disconnection switch 9 is controlled to be opened, the commercial system 5 and the interconnection point 17 are electrically opened, and the power conditioner 1 and the commercial system 5 are electrically disconnected.
  • the interconnection relay 10 opens and closes the electrical connection between the power converter 2 and the interconnection point 17. Specifically, when the interconnection relay 10 is controlled to be closed, the power converter 2 and the interconnection point 17 are electrically connected. When the interconnection relay 10 is controlled to be open, the power converter 2 and the interconnection point 17 are electrically opened.
  • the grid-connected inverter device is equipped with the islanding prevention function to prevent the grid-connected inverter device from continuing to supply power to the accident point when the commercial grid fails.
  • the method for realizing the islanding prevention function is roughly classified into a passive method and an active method.
  • the passive method is a method that detects an isolated operation by detecting a phenomenon such as a voltage phase change or a sudden frequency change that may occur when the commercial grid loses power and the grid-connected inverter device enters the independent operation state.
  • the grid interconnection inverter device outputs an active signal for varying the voltage or the frequency to the commercial system, and increases the variation in the voltage or the frequency when the commercial system fails.
  • This is a method for detecting isolated operation.
  • a frequency feedback system with step injection is widely used, which has features that it can detect an isolated operation state at high speed, there is no mutual interference between the same systems, and it does not perform unnecessary operation at the time of system disturbance.
  • This system can detect the islanding operation at high speed by injecting reactive power sharply from the frequency change rate of the system so as to further promote the frequency change.
  • the islanding detection function operates regardless of whether or not there is a grid, and it is necessary to avoid unnecessary injection of reactive power when the grid is normal. Therefore, when the system is normal and the frequency change is small, it is required not to inject the reactive power or to reduce the injection amount.
  • the switching of the self-sustained operation function can be performed using the operation monitor 6, for example.
  • the power conditioner 1 is equipped with a power supply circuit 12, a secondary battery opening circuit breaker 13, and a secondary battery 14 as a configuration for starting the control circuit 11 in the self-sustained operation mode. ..
  • the circuit breaker 13 for opening the secondary battery is provided to prevent the secondary battery 14 from discharging. For example, when the power conditioner 1 is not used for a long period of time such as when the product is shipped, the secondary battery opening circuit breaker 13 is opened.
  • FIG. 2 is a diagram showing a flow chart of the activation sequence in the first embodiment.
  • FIG. 2 shows a start-up sequence until the power conditioner 1 switches to the independent operation and the grid interconnection inverter device 7 starts the grid interconnection operation. Note that the reference numerals are omitted in FIG.
  • the power conditioner 1 and the grid interconnection inverter device 7 stop their operations due to the protection function such as a system abnormality.
  • the interconnection relay 10 and the system disconnection switch 9 are controlled to open.
  • the power conditioner 1 and the grid interconnection inverter device 7 are disconnected from the commercial grid 5, that is, electrically disconnected from the commercial grid 5.
  • the electrical connection between the power conditioner 1 and the electric vehicle 3 is also opened.
  • the circuit breaker 13 for opening the secondary battery drives the control circuit 11 of the power conditioner 1, and therefore is controlled to be in the closed state if it is in the open state, or maintains that state if it is in the closed state.
  • step S1 when the operation mode of the power conditioner 1 is switched to the independent operation mode by operating the operation monitor 6, the power conditioner 1 and the grid interconnection inverter device 7 are electrically connected to the commercial grid 5. In order to prevent this, the system disconnecting switch 9 is controlled to be open (step S1).
  • step S3 the islanding prevention function of the grid interconnection inverter device 7 is invalidated.
  • the control of step S3 is performed by communication between the power conditioner 1 and the grid interconnection inverter device 7 using the communication circuit 15.
  • the power conditioner 1 sends a command for disabling the islanding prevention function to the grid interconnection inverter device 7 via the communication circuit 15.
  • the grid interconnection inverter device 7 receives this command and disables the islanding prevention function according to the contents of the command.
  • the islanding prevention function that is disabled may be only the active method or both the active method and the passive method.
  • step S4 the power conditioner 1 starts independent operation (step S4).
  • the interconnection relay 10 is controlled to be closed. That is, the power conditioner 1 shifts to the self-sustained operation after the islanding prevention function of the grid interconnection inverter device 7 is set to be invalid.
  • the output voltage of the power conditioner 1 is added to the output of the interconnection inverter device 7 (step S5).
  • the DC output voltage of the solar cell panel 4 and the AC voltage simulating the commercial grid 5 are applied to the grid interconnection inverter device 7. Therefore, the grid interconnection inverter device 7 starts the grid interconnection operation as in the case where the commercial grid 5 is normal (step S6).
  • the voltage generated by the power conditioner 1 is used as the voltage output from the commercial power system 5 in the self-sustained operation when the commercial power system 5 fails.
  • the grid-connected inverter device 7 When the grid-connected inverter device 7 is considered to operate, the islanding prevention function of the grid-connected inverter device 7 is disabled by the communication means built between the power conditioner 1 and the grid-connected inverter device 7. .. As a result, it is possible to prevent the grid interconnection inverter device 7 from stopping due to the islanding prevention function. As a result, even if the commercial system 5 fails, the electric power generated by the solar cell panel 4 can be effectively used.
  • the grid interconnection inverter device 7 regards the output voltage of the power conditioner 1 during the self-sustained operation as the grid voltage and continues the grid interconnection operation.
  • the output voltage of the power conditioner 1 is inferior in quality such as large waveform distortion as compared with the commercial system. Therefore, depending on the product specifications of the grid-connected inverter device 7, the output voltage of poor quality output from the power conditioner 1 causes the isolated operation prevention function, which is a protection function, to operate, and the operation of the grid-connected inverter device 7 to operate. Can stop.
  • the islanding prevention function is a function for disconnecting the system interconnection inverter device 7 that is connected to the commercial system 5 from the commercial system 5 when the commercial system 5 fails. ..
  • the commercial system 5 and the system interconnection inverter device 7 are electrically connected inside the power conditioner 1 and are not electrically connected outside the power conditioner 1.
  • the composition Therefore, if the commercial system 5 and the grid interconnection inverter device 7 are disconnected by the power conditioner 1, the commercial grid 5 and the grid interconnection inverter device 7 are not interconnected, so It is possible to disable the driving prevention function. Accordingly, it is possible to prevent the operation stop of the grid interconnection inverter device 7 that may occur due to the quality of the AC voltage output from the power conditioner 1.
  • the islanding prevention function of the grid interconnection inverter device 7 is disabled by the communication means between the power conditioner 1 and the grid interconnection inverter device 7. can do. This makes it possible to disable the islanding prevention function of the grid-connected inverter device 7 without being affected by the specifications of the grid-connected inverter device 7. The generated power can be used reliably and stably.
  • FIG. 3 is a flowchart showing an operation sequence according to the second embodiment.
  • FIG. 3 shows an operation sequence when the power conditioner 1 switches from the independent operation mode to the interconnection operation mode. Similar to FIG. 2, reference numerals are omitted in FIG.
  • the basic configuration is the same as or equivalent to the configuration of the first embodiment shown in FIG. 1, and a description of the specific configuration will be omitted.
  • the power conditioner 1 and the grid-connected inverter device 7 will stop operating due to a protection function such as a system error.
  • the interconnection relay 10 and the system disconnection switch 9 are controlled to open.
  • the power conditioner 1 and the grid interconnection inverter device 7 are disconnected from the commercial grid 5, that is, electrically disconnected from the commercial grid 5.
  • the electrical connection between the power conditioner 1 and the electric vehicle 3 is also opened.
  • the circuit breaker 13 for opening the secondary battery drives the control circuit 11 of the power conditioner 1, and therefore is controlled to be in the closed state if it is in the open state, or maintains that state if it is in the closed state.
  • step S11 when the commercial system 5 is restored, when the operation mode of the power conditioner 1 is switched to the interconnection operation mode by the operation of the operation monitor 6, the power conditioner 1 is stopped and the interconnection relay 10 Is controlled to open (step S11).
  • step S12 After the processing of step S12, the electrical connection between the power conditioner 1 and the electric vehicle 3 is released (step S13), and the system disconnection switch 9 is controlled to be closed (step S14).
  • step S14 the switch 9 for system disconnection is controlled to be closed, the interconnection relay 10 is controlled to be closed, and the power conditioner 1 starts interconnection operation (step S15).
  • the independent operation prevention function of the grid interconnection inverter device 7 is automatically switched. Done in. As a result, it is possible to prevent the grid-connected inverter device 7 from running in an interconnected manner while the islanding prevention function is disabled. This makes it possible to comply with the grid interconnection regulations.
  • FIG. 4 is a block diagram showing an example of a hardware configuration for realizing the function of the control circuit 11 in the first and second embodiments.
  • FIG. 5 is a block diagram showing another example of the hardware configuration for realizing the function of the control circuit 11 in the first and second embodiments.
  • a processor 200 that performs an operation and a program read by the processor 200 are stored.
  • the memory 202 and the interface 204 for inputting/outputting signals can be included.
  • the processor 200 may be a computing unit such as a computing device, a microprocessor, a microcomputer, a CPU (Central Processing Unit), or a DSP (Digital Signal Processor).
  • the memory 202 is a nonvolatile or volatile semiconductor memory such as a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, an EPROM (Erasable Programmable ROM), and an EEPROM (registered trademark) (Electrically EPROM).
  • a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, a DVD (Digital Versatile Disc), and a BD (Blu-ray (registered trademark) Disk) can be exemplified.
  • a program for executing the function of the control circuit 11 is stored in the memory 202.
  • the processor 200 sends and receives necessary information via the interface 204, the processor 200 executes the program stored in the memory 202, and the processor 200 refers to the table stored in the memory 202 to perform the above-described arithmetic processing. It can be performed.
  • the calculation result by the processor 200 can be stored in the memory 202.
  • Information input by operating the operation monitor 6 can be loaded into the processor 200 or the memory 202 via the interface 204. Further, the processing result of the processor 200 can be displayed on the operation monitor 6 via the interface 204.
  • the processor 200 and the memory 202 shown in FIG. 4 may be replaced with the processing circuit 203 as shown in FIG.
  • the processing circuit 203 corresponds to a single circuit, a composite circuit, an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a combination thereof.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Inverter Devices (AREA)

Abstract

La présente invention concerne un conditionneur d'énergie (1) comprenant : un convertisseur de courant bidirectionnel (2) destiné à convertir le courant continu fourni par un véhicule électrique (3) et un courant alternatif fourni par un côté système commercial (5) l'un en l'autre ; un commutateur de mise hors tension en parallèle du système (9) destiné à la commutation électrique entre le système commercial (5) et un point d'interconnexion (17) auquel le convertisseur de courant (2), un dispositif onduleur d'interconnexion de système (7), et le système commercial (5) sont chacun connectés électriquement ; un relais d'interconnexion (10) destiné à effectuer une commutation électrique entre le convertisseur de courant (2) et le point d'interconnexion (17) ; et un circuit de communication (15) destiné à permettre une communication entre le conditionneur d'énergie (1) et le dispositif onduleur d'interconnexion de système (7). Lorsque le système commercial (5) est défaillant, le conditionneur d'énergie (1) ouvre électriquement le commutateur de mise hors tension en parallèle du système (9) et passe en fonctionnement autonome après la désactivation de la fonction de protection de fonctionnement autonome du dispositif onduleur d'interconnexion de système (7).
PCT/JP2019/000547 2019-01-10 2019-01-10 Procédé de commande de conditionneur d'énergie et dispositif onduleur d'interconnexion de système WO2020144815A1 (fr)

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PCT/JP2019/000547 WO2020144815A1 (fr) 2019-01-10 2019-01-10 Procédé de commande de conditionneur d'énergie et dispositif onduleur d'interconnexion de système

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013063000A (ja) * 2011-09-15 2013-04-04 Sumitomo Electric Ind Ltd 系統連系保護システム、系統連系保護装置、及び、パワーコンディショナ
WO2013046638A1 (fr) * 2011-09-28 2013-04-04 京セラ株式会社 Système de conditionnement de puissance et conditionneur de puissance de batterie de stockage
JP2013168224A (ja) * 2012-02-14 2013-08-29 Jx Nippon Oil & Energy Corp 燃料電池システム
JP2014079137A (ja) * 2012-10-12 2014-05-01 Sanken Electric Co Ltd 非常用電源システム
JP2017184362A (ja) * 2016-03-29 2017-10-05 田淵電機株式会社 パワーコンディショナ、電力供給システム及び電流制御方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013063000A (ja) * 2011-09-15 2013-04-04 Sumitomo Electric Ind Ltd 系統連系保護システム、系統連系保護装置、及び、パワーコンディショナ
WO2013046638A1 (fr) * 2011-09-28 2013-04-04 京セラ株式会社 Système de conditionnement de puissance et conditionneur de puissance de batterie de stockage
JP2013168224A (ja) * 2012-02-14 2013-08-29 Jx Nippon Oil & Energy Corp 燃料電池システム
JP2014079137A (ja) * 2012-10-12 2014-05-01 Sanken Electric Co Ltd 非常用電源システム
JP2017184362A (ja) * 2016-03-29 2017-10-05 田淵電機株式会社 パワーコンディショナ、電力供給システム及び電流制御方法

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