WO2015019386A1 - Storage battery management device and display device - Google Patents

Storage battery management device and display device Download PDF

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Publication number
WO2015019386A1
WO2015019386A1 PCT/JP2013/004778 JP2013004778W WO2015019386A1 WO 2015019386 A1 WO2015019386 A1 WO 2015019386A1 JP 2013004778 W JP2013004778 W JP 2013004778W WO 2015019386 A1 WO2015019386 A1 WO 2015019386A1
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WO
WIPO (PCT)
Prior art keywords
power
storage battery
unit
conversion device
power conversion
Prior art date
Application number
PCT/JP2013/004778
Other languages
French (fr)
Japanese (ja)
Inventor
靖弘 大上
洋輔 大槻
岩▲崎▼　利哉
Original Assignee
三洋電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三洋電機株式会社 filed Critical 三洋電機株式会社
Priority to PCT/JP2013/004778 priority Critical patent/WO2015019386A1/en
Publication of WO2015019386A1 publication Critical patent/WO2015019386A1/en

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Classifications

    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • 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
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • 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
    • H02J3/381—Dispersed generators
    • 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
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
    • 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
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

Definitions

  • the present invention relates to a storage battery management device and a display device.
  • the power to be supplied by the storage battery can vary depending on whether or not power is supplied from a power generation system that generates power based on renewable energy. For this reason, it is desired to simply set whether or not the storage battery system coexists with a power generation system that generates power based on renewable energy.
  • the present invention has been made in view of such a situation, and an object of the present invention is to set up cooperation between a storage battery and a power generation system that generates power based on renewable energy in a storage battery system for assisting a system power supply that is a commercial power supply. It is to provide a technology that facilitates the process.
  • a storage battery management device converts power generated by a charge / discharge control unit that manages charge / discharge of a storage battery and a power generation device that generates power based on renewable energy.
  • a communication unit that communicates with the power conversion device to perform, and an availability setting unit that sets whether the use of the power conversion device is valid or invalid.
  • the availability setting unit changes the use of the power conversion device to a valid setting. .
  • This display device includes a charge / discharge control unit that manages charge / discharge of a storage battery, a communication unit that communicates with a power conversion device that converts power generated by a power generation device that generates power based on renewable energy, and a power conversion device
  • a display apparatus in an electrical storage system provided with the use availability setting part which sets whether use of is effective or invalid, and the display part which displays the setting of use of a power converter device.
  • the availability setting unit changes the use of the power conversion device to a valid setting when the communication unit receives data from the power conversion device when the use of the power conversion device is invalid.
  • a display part displays the use setting after a change, when the usability setting part changes the use setting of the said power converter device.
  • a storage battery system for assisting a system power supply that is a commercial power supply it is possible to easily set the cooperation between the storage battery and a power generation system that generates power based on renewable energy.
  • FIGS. 4A to 4D are diagrams for explaining a physical configuration example of the power storage system according to the embodiment of the present invention. It is the figure which looked at the housing
  • FIGS. 15A to 15D are diagrams illustrating an example of a display screen displayed on the display device by the notification unit.
  • the embodiment of the present invention relates to a power storage system connected to a system power supply, and further relates to a power storage system linked to a solar power generation system.
  • the power storage system is installed in, for example, industrial facilities, public facilities, commercial facilities, office buildings, residences, and the like.
  • the electricity bill at night time is set lower than the electricity bill at daytime. For example, the electricity charge from 23:00 to 7:00 on the next day is set cheaper than other time zones. Therefore, the electricity charge can be suppressed by charging the storage battery from the system power supply at night and using the electric power stored in the storage battery during the daytime. From the power company side, the amount of power used will be leveled.
  • the electric power stored in the storage battery is used as a backup power source for operating a specific load (for example, a light, an elevator, a computer server, etc.) when the system power supply fails.
  • the specific load is a preset load that can receive power supply from the storage battery or the solar power generation system preferentially at the time of a power failure of the system power supply.
  • other loads are referred to as general loads.
  • FIG. 1 is a diagram for explaining a power storage system 100 according to an embodiment of the present invention.
  • the power storage system 100 includes a storage battery module 10, a storage battery power conditioner 20, a storage battery management device 30, an inverter fan 50, a storage battery fan 60, a first switch S1 to a ninth switch S9, and a first breaker B1 to a third.
  • a breaker B3 is provided.
  • relays are used for the first switch S1 to the ninth switch S9.
  • a semiconductor switch such as a power MOSFET may be used instead of the relay.
  • System power supply 200 is a commercial power supply supplied from an electric power company.
  • the system power supply 200 is connected to the storage battery power conditioner 20 via the second switch S2. Moreover, it is connected to the PV power conditioner 40 through the fourth switch S4, the fifth switch S5, and the second breaker B2. Between the storage battery power conditioner 20 and the PV power conditioner 40, the second switch S2, the fourth switch S4, the fifth switch S5, the second breaker B2, or the third switch S3, the fourth switch S4, the fifth It is connected via the switch S5 and the second breaker B2.
  • the path between the grid power supply 200 and the storage battery power conditioner 20, the path between the grid power supply 200 and the PV power conditioner 40, and the path between the storage battery power conditioner 20 and the PV power conditioner 40 are configured to be conductive. Alternating current flows through these paths. Hereinafter, these paths are collectively referred to as an alternating current path.
  • the storage battery power conditioner 20 is connected to the storage battery module 10 via the first switch S1 and the first breaker B1.
  • the photovoltaic power generation system 300 includes a solar cell 310 and a PV power conditioner 40, and the PV power conditioner 40 is connected to the solar cell 310.
  • the storage battery power conditioner 20 includes a bidirectional inverter 21 (see FIG. 6) as described later.
  • the bidirectional inverter 21 converts AC power into DC power when charging the storage battery module 10, and converts DC power into AC power when discharging from the storage battery module 10.
  • the PV power conditioner 40 includes an inverter 41 (see FIG. 6) as will be described later.
  • the inverter 41 converts DC power generated by the solar power generation system 300 into AC power.
  • the storage battery module 10 is a packaged secondary battery that can be freely charged and discharged and can be used repeatedly.
  • the storage battery module 10 includes a plurality of storage battery cells connected in series or series-parallel. In the present embodiment, it is assumed that a lithium ion battery is used as the storage battery cell. Other types of batteries such as nickel metal hydride batteries and lead batteries may be used instead of lithium ion batteries.
  • One or a plurality of storage battery modules 10 are used in combination.
  • the plurality of storage battery modules 10 connected in series are connected / disconnected by the switching unit.
  • a plurality of storage battery modules 10 may be used in series-parallel connection.
  • the storage battery module 10 is charged with grid power or power generated by the solar power generation system 300.
  • the solar power generation system 300 is a power generation device that uses the photovoltaic effect. Any of a silicon system, a compound system, and an organic system may be used for the solar battery constituting the solar power generation system 300.
  • the storage battery power conditioner 20 converts the DC power output from the storage battery module 10 into AC power
  • the PV power conditioner 40 converts the DC power generated by the photovoltaic power generation system 300 into AC power.
  • 200, the storage battery module 10, and the photovoltaic power generation system 300 can be linked by a single alternating current path.
  • General load 400 is connected on a path between system power supply 200 and power storage system 100.
  • the specific load 500 is connected to a node between the fourth switch S4 and the fifth switch S5 in the AC current path via the sixth switch S6 and the third breaker B3.
  • General load 400 and specific load 500 operate by receiving AC power supplied from an AC current path.
  • the specific load 500 can receive power supply from at least one of the storage battery module 10 and the photovoltaic power generation system 300, but the general load 400 cannot receive power supply.
  • the inverter fan 50 is connected to a node between the fourth switch S4 and the fifth switch S5 in the AC current path via the seventh switch S7.
  • the inverter fan 50 is a fan for cooling the bidirectional inverter 21 of the storage battery power conditioner 20.
  • the storage battery fan 60 is connected to a node between the fourth switch S4 and the fifth switch S5 in the AC current path via the ninth switch S9.
  • the storage battery fan 60 is a fan that is operated when the storage battery module 10 is cooled and heated.
  • the heater 70 is connected to a node between the fourth switch S4 and the fifth switch S5 in the AC current path via the eighth switch S8.
  • the heater 70 is a heater for heating the storage battery module 10 and is used for increasing the temperature of the storage battery cell in the storage battery module 10.
  • the temperature sensor 600 detects the outside air temperature as the environmental temperature and outputs it to the storage battery management device 30.
  • a thermistor can be used as the temperature sensor 600.
  • the storage battery management device 30 is mainly a device for managing the storage battery module 10.
  • the storage battery management device 30 and the storage battery power conditioner 20 are connected to each other, and the storage battery management device 30 and the PV power conditioner 40 are connected to each other by a communication line using a metal wire. Between them, communication conforming to serial communication standards such as RS-232C and RS-485 is executed.
  • the communication lines are insulated from each other by using optical fibers.
  • the storage battery management device 30 is connected to the storage battery module 10 through a communication line using an optical fiber.
  • the storage battery management device 30 is connected to each of the seventh switch S7 to the ninth switch S9 by a communication line using metal wiring.
  • the storage battery management device 30 indirectly controls the inverter fan 50 and the like by controlling on / off of the seventh switch S7 to the ninth switch S9. Detailed operation of the storage battery management device 30 will be described later.
  • Each of the first switch S1 to the sixth switch S6 and the first breaker B1 to the third breaker B3 is connected to the storage battery power conditioner 20 through a communication line using metal wiring. These are controlled by a control circuit 22 (see FIG. 6), which will be described later, in the storage battery power conditioner 20 based on an instruction from the storage battery management device 30 to the storage battery power conditioner 20 or based on a judgment unique to the storage battery power conditioner 20. .
  • the power storage system 100 is operated in either the grid connection mode or the independent operation mode.
  • the self-sustained operation mode is basically selected at the time of power failure of the system power supply 200.
  • FIG. 2 is a diagram for explaining a grid interconnection mode of power storage system 100 according to the embodiment of the present invention.
  • the control circuit 22 in the storage battery power conditioner 20 controls the second switch S2 to be on, the third switch S3 to be off, and the fourth switch S4 to the third switch side. Control to connect to the terminal on the system power supply side instead.
  • the grid connection mode the grid power supply 200, the photovoltaic power generation system 300, and the storage battery module 10 are conducted through a single AC current path AP (see thick line).
  • the bidirectional inverter 21 of the storage battery power conditioner 20 When discharging from the storage battery module 10 in the grid connection mode, the bidirectional inverter 21 of the storage battery power conditioner 20 causes a current to flow through the AC current path AP at a frequency and phase synchronized with the frequency of the system power supply 200.
  • FIG. 3 is a diagram for explaining a self-sustaining operation mode of power storage system 100 according to the embodiment of the present invention.
  • the control circuit 22 in the storage battery power conditioner 20 controls the second switch S2 to be turned off and the third switch S3 to be turned on, and the fourth switch S4 is turned on the system power supply side. Control to connect to the terminal on the third switch side.
  • the photovoltaic power generation system 300 and the storage battery module 10 are electrically disconnected from the system power supply 200.
  • the bidirectional inverter 21 of the storage battery power conditioner 20 When discharging from the storage battery module 10 in the self-sustained operation mode, the bidirectional inverter 21 of the storage battery power conditioner 20 causes a current to flow from the system power supply 200 to the AC current path AP at a frequency and phase independent from each other.
  • the specific load 500 is electrically connected to the alternating current path AP (see thick line) formed in the self-sustained operation mode, but the general load 400 is electrically cut off. Therefore, the power stored in the storage battery module 10 and the power generated by the solar power generation system 300 can be supplied only to the specific load 500 at the time of a power failure.
  • FIGS. 4A to 4D are diagrams for explaining a physical configuration example of the power storage system 100 according to the embodiment of the present invention.
  • the components of the power storage system 100 surrounded by a dotted line in FIGS. 1 to 3 are housed in a housing 110 having an openable door.
  • 4A is a view of the housing 110 viewed from the top surface 110t
  • FIG. 4B is a view of the housing 110 viewed from the front surface 110f
  • FIG. 4C is a view of the housing 110 viewed from the bottom surface 110b
  • FIG. 4D is a view of the housing 110 viewed from the right side 110s.
  • the housing 110 is a vertically long box, and the storage battery module 10 is disposed in the lower part of the housing 110.
  • the storage battery management device 30 is disposed on the storage battery module 10, and the storage battery power conditioner 20, the first breaker B1 to the third breaker B3 are disposed thereon.
  • the bidirectional inverter 21 of the storage battery power conditioner 20 is arranged on the top surface side from the storage battery module 10.
  • the PV power conditioner 40 may also be designed to be installed in the housing 110.
  • a first air hole 111 is provided in the top surface 110t of the housing 110.
  • An inverter fan 50 is provided in the vicinity of the first air hole 111.
  • the inverter fan 50 is an exhaust fan and discharges hot air in the vicinity of the bidirectional inverter 21.
  • the inverter fan 50 cools the bidirectional inverter 21 by sucking up air introduced from the second air hole 113 and the third air hole 114 provided in the lower part of the casing 110.
  • a storage battery fan 60 is provided in the lower part of the housing 110.
  • the storage battery fan 60 introduces outside air from the second air hole 113 and the third air hole 114.
  • the cooling efficiency of the storage battery module 10 can be increased.
  • a handle 112 As shown in FIG. 4B, a handle 112, a second air hole 113, and a third air hole 114 are provided on the front surface 110f of the housing 110.
  • the second air hole 113 and the third air hole 114 are provided side by side below the front surface 110f.
  • two entry holes 115 and 116 are provided on the bottom surface 110 b of the housing 110.
  • FIG. 5 is a view of the housing 110 viewed from the right side surface 110s.
  • FIG. 5 is a diagram depicting the vicinity of region A in FIG. 4D in more detail.
  • the storage battery fan 60 is arranged in the vicinity of the bottom surface in the housing 110 so that the outside air inlet faces the second air hole 113 and the third air hole 114.
  • the heater 70 receives air sent from the storage battery fan 60 and sends warm air.
  • the heater 70 includes a heat sink, and the storage battery fan 60 and the heater 70 are configured so that the air outlet of the storage battery fan 60 and the heat sink face each other.
  • the storage battery fan 60 and the heater 70 are provided on the bottom side of the storage battery module 10.
  • both the storage battery fan 60 and the heater 70 are operated to warm and release the air sucked from the second air hole 113 and the third air hole 114.
  • the discharged warm air rises from the bottom surface side to the top surface side in the housing 110 and is exhausted from the first air hole 111 provided on the top surface.
  • FIG. 6 is a functional block diagram for explaining the components of the power storage system 100 of FIG.
  • the storage battery module 10 includes a storage battery cell 11, a voltage sensor 12, a current sensor 13, and a temperature sensor 14.
  • the storage battery cell 11 of FIG. 6 is drawn as a general term for a plurality of storage battery cells.
  • the voltage sensor 12 detects the voltage of each storage battery cell.
  • the current sensor 13 detects the current flowing through the storage battery cell 11.
  • a Hall element or a shunt resistor can be used for the current sensor 13.
  • the temperature sensor 14 detects the temperature of the storage battery cell 11 in the storage battery module 10.
  • a thermistor can be used for the temperature sensor 14.
  • the voltage value detected by the voltage sensor 12, the current value detected by the current sensor 13, and the temperature value detected by the temperature sensor 14 are output as monitoring data of the storage battery module 10 to the storage battery management device 30 via the communication path.
  • the storage battery power conditioner 20 includes a bidirectional inverter 21 and a control circuit 22.
  • the control circuit 22 executes mode management of the power storage system 100, control of the bidirectional inverter 21, communication with the storage battery management device 30, control of the first switch S1 to sixth switch S6, control of the first breaker B1 to third breaker B3, and the like. To do.
  • the control circuit 22 controls the inverter fan 50 in order to cool the bidirectional inverter 21.
  • the PV power conditioner 40 includes an inverter 41 and a control circuit 42.
  • the control circuit 42 executes state management of the photovoltaic power generation system 300, power generation control, communication with the storage battery management device 30, and the like.
  • the display device 700 displays various setting screens, status information of the storage battery module 10 and the photovoltaic power generation system 300 under the control of the storage battery management device 30.
  • the storage battery management device 30 includes a communication unit 31, a monitoring data acquisition unit 32, a user input reception unit 33, an SOC (StategeOf Charge) calculation unit 34, a charge / discharge control unit 35, a power generation control unit 36, a temperature control unit 37, a fan / heater A control unit 38 and a switch control unit 39 are provided.
  • SOC StateOf Charge
  • a charge / discharge control unit 35 a power generation control unit 36
  • a temperature control unit 37 a fan / heater
  • a control unit 38 and a switch control unit 39 are provided.
  • These configurations can be realized by an arbitrary processor, memory, or other LSI in terms of hardware, and are realized by a program loaded in the memory in terms of software.
  • Draw functional blocks Accordingly, those skilled in the art will understand that these functional blocks can be realized in various forms by hardware only, software only, or a combination thereof.
  • the communication unit 31 controls packet communication between the storage battery management device 30 and the storage battery power conditioner 20, and packet communication between the storage battery management device 30 and the PV power conditioner 40.
  • the monitoring data acquisition unit 32 acquires monitoring data transmitted from the storage battery module 10. In addition, the monitoring data acquisition unit 32 acquires temperature data indicating the temperature outside the housing 110 transmitted from the temperature sensor 600.
  • the user input reception unit 33 receives information input to the operation unit 800 by the user. For example, information such as a charging start time at which charging processing from the system power supply 200 to the storage battery module 10 is started and a charging rate thereof is received.
  • the SOC calculation unit 34 calculates the SOC (remaining capacity) of the storage battery cell 11 based on the monitoring data transmitted from the storage battery module 10.
  • SOC calculation method an OCV (Open Circuit Voltage) method or a Coulomb count method can be used.
  • the charge / discharge control unit 35 transmits to the control circuit 22 of the storage battery power conditioner 20 a packet signal including a charge setting value indicating a charge rate when the storage battery module 10 is charged. In addition, the charge / discharge control unit 35 transmits a packet signal including a discharge set value indicating a discharge rate when discharging from the storage battery module 10 to the control circuit 22. Further, the charge / discharge control unit 35 receives a packet signal including a charge value that is actually charged or a discharge value that is actually discharged from the control circuit 22. While the storage battery module 10 is being charged or discharged, the charge / discharge control unit 35 periodically transmits a packet signal to the control circuit 22 (for example, every 1 second). Each time the control circuit 22 receives the packet signal, it returns a packet signal containing actual data.
  • the power generation control unit 36 receives a packet signal including power generation information of the solar power generation system 300 from the control circuit 42 of the PV power conditioner 40.
  • the power generation control unit 36 transmits a packet signal including information for controlling power generation to the control circuit 42.
  • the power generation control unit 36 transmits the packet signal to the control circuit 42 periodically (for example, every 1 second). Each time the control circuit 42 receives the packet signal, it returns a packet signal containing actual data. When there is no response from the control circuit 42, the power generation control unit 36 lengthens the transmission cycle of the packet signal. For example, the period is changed to one minute.
  • the temperature control unit 37 controls the temperature of the storage battery cell 11 and controls the fan / heater control unit 38 to adjust the temperature of the storage battery cell 11.
  • the fan / heater control unit 38 operates at least one of the storage battery fan 60 and the inverter fan 50. Basically, the storage battery fan 60 is operated, and the outside air sucked from the second air hole 113 and the third air hole 114 is blown to the storage battery cell 11 to cool the storage battery cell 11. At that time, when the inverter fan 50 is operated, introduction of outside air can be promoted. When the inverter fan 50 is an intake fan, the inverter fan 50 can be operated to introduce outside air from the upper side of the storage battery cell 11.
  • the fan / heater control unit 38 operates the storage battery fan 60 and the heater 70 and controls the inverter fan 50 to be inactive. As shown in FIG. 4D, the hot air blows up from the lower part of the storage battery module 10 to the upper part, whereby the temperature of the storage battery cell 11 can be increased. At this time, by stopping the inverter fan 50, introduction of outside air from the second air hole 113 and the third air hole 114 can be suppressed, and the air heated by the heater 70 can be circulated inside the housing 110. . Thereby, the heating efficiency of the heater 70 is improved.
  • the inverter fan 50 when the inverter fan 50 is an intake fan, it can prevent that external air is blown from the upper part side of the storage battery module 10 by stopping the inverter fan 50.
  • FIG. The situation in which the storage battery cell 11 needs to be heated is usually a state in which the outside air temperature is low. When the inverter fan 50 is operated, cold air is blown onto the storage battery module 10 from above.
  • the switch control unit 39 transmits a packet signal including control information to the control circuit 22 of the storage battery power conditioner 20, and through the control circuit 22, the first switch S1 to the sixth switch S6 and the first breaker B1 to the first breaker B1.
  • the control of the 3 breaker B3 can be performed.
  • the switch control unit 39 can stop the power supply to the heater 70 by controlling the eighth switch S8 to be off.
  • the power supply to the storage battery fan 60 can be stopped by controlling the ninth switch S9 to be off.
  • the power supply to the inverter fan 50 can be stopped by controlling the seventh switch S7 to be turned off.
  • the seventh switch S7, the eighth switch S8, and the ninth switch S9 can also be controlled from the control circuit 22 of the storage battery power conditioner 20.
  • the switch control unit 39 can stop the power supply to the specific load 500 by controlling the sixth switch S6 to be off.
  • the switch control unit 39 turns off the sixth switch S6 when the power consumption of the specific load 500 exceeds the generated power of the solar power generation system 300 at the time of a power failure of the system power supply 200.
  • the sixth switch S6 is turned off under this condition, there is a tendency that the power supply opportunity to the specific load 500 at the time of a power failure decreases. In particular, when a power failure occurs at night, the specific load 500 cannot be supplied with power. Therefore, when the power consumption of the specific load 500 exceeds a certain power, the sixth switch S6 may be controlled based on the above-described conditions.
  • the power supply to the specific load 500 is not stopped. If the constant power is 1 kW, for example, the specific load 500 can be used within a range not exceeding 1 kW regardless of the power generation of the solar power generation system 300. Therefore, the power supply opportunity to the specific load 500 at the time of a power failure can be increased.
  • it is desirable to determine the value of the constant power in consideration of the power consumption of lighting and air conditioning equipment that is assumed to be used during a power failure.
  • the switch control unit 39 is the first when the power consumption of the specific load 500 exceeds the adjusted generated power obtained by adding the adjusted power (positive value) to the generated power of the photovoltaic power generation system 300 during the power failure of the system power supply 200.
  • the 6 switch S6 may be turned off. Also in this case, the power supply opportunity to the specific load 500 at the time of a power failure can be increased.
  • the switch control unit 39 turns off the sixth switch S6 when the SOC of the storage battery module 10 falls below a set value for preventing overdischarge (for example, 10%) during a power failure of the system power supply 200.
  • the overdischarge prevention set value is set according to the capacity of the specific load 500. As the capacity of the specific load 500 is smaller, a smaller value is set as the overdischarge prevention set value.
  • the switch control unit 39 may turn off the sixth switch S6 when both of the two conditions are satisfied, or may turn off the sixth switch S6 only when one of the two conditions is satisfied.
  • the power storage system 100 operates in the self-sustaining operation mode at the time of power failure of the system power supply 200. Therefore, when the power consumption of the specific load 500 exceeds the power generation power of the solar power generation system 300, the capacity of the storage battery module 10 decreases. The storage battery module 10 deteriorates when overdischarged.
  • Whether or not the power consumption of the specific load 500 exceeds the power generation of the solar power generation system 300 can be determined by detecting whether or not the power storage system 100 is discharged. In the self-sustaining operation mode, when the power consumption of the specific load 500 exceeds the power generation power of the solar power generation system 300, the storage battery module 10 is in a discharged state. Conversely, when the power consumption of the specific load 500 is lower than the power generation of the solar power generation system 300, the storage battery module 10 is in a charged state.
  • the switch control unit 39 can specify whether the storage battery module 10 is discharging or charging with reference to information included in the packet signal received from the control circuit 22 of the storage battery power conditioner 20.
  • a current sensor may be installed in the AC current path, and it may be determined whether or not the power consumption of the specific load 500 exceeds the generated power of the photovoltaic power generation system 300 from the direction of the current. Further, a current sensor may be installed in the current path between the AC current path and the specific load 500, and the determination may be made based on the measured value.
  • FIG. 7 is a flowchart for explaining a control example of the sixth switch S6 in the self-sustaining operation mode by the power storage system 100 according to the embodiment of the present invention.
  • the monitoring data acquisition part 32 acquires monitoring data, such as a voltage value of a storage battery cell, from the storage battery module 10 (S10).
  • the SOC calculation unit 34 calculates the SOC of the storage battery module 10 based on the monitoring data (S11).
  • the switch control unit 39 compares the calculated SOC with the first set value for preventing overdischarge (S12). When the SOC is equal to or higher than the first set value (N in S12), the process proceeds to step S10.
  • the switch control unit 39 determines whether or not the storage battery module 10 is in a discharged state (S13). When not in the discharging state (N in S13), the process proceeds to step S10. When it is in a discharging state (Y in S13), the switch control unit 39 turns off the sixth switch S6 (S14).
  • the monitoring data acquisition part 32 acquires monitoring data, such as a voltage value of a storage battery cell, from the storage battery module 10 (S15).
  • the SOC calculation unit 34 calculates the SOC of the storage battery module 10 based on the monitoring data (S16).
  • the switch control unit 39 compares the calculated SOC with the second set value for return (S17).
  • the second set value is set to a value larger than the first set value. For example, the first set value + 10% is set.
  • the process proceeds to step S15.
  • the switch control unit 39 turns on the sixth switch S6 (S18).
  • the additional condition may be that the storage battery module 10 is in a discharged state.
  • An additional condition may be that the display device 700 displays that the return is possible and the user inputs a return instruction to the operation unit 800. In this case, when the SOC of the storage battery module 10 becomes equal to or higher than the second set value after the sixth switch S6 is turned off, the switch control unit 39 causes the display device 700 to display that it can be returned.
  • the heat dissipating device When the specific load 500 includes a heat dissipating device such as an electric heater, the heat dissipating device is stopped by turning off the sixth switch S6.
  • the user may place a combustible material near the heat dissipating device after the heat dissipating device is stopped. is there.
  • the user can be made aware of the resumption of power supply.
  • the load to be the specific load 500 is selected by the user. Therefore, for example, in the case of only the specific load 500 that does not become an unsafe state even if the LED light is automatically restored, it is not necessary to make a user operation a condition.
  • the user can set in advance whether or not to automatically return from the setting screen displayed on the display device 700 before the start of operation. When this setting is valid, when the SOC becomes equal to or higher than the second set value, the switch control unit 39 turns on the sixth switch S6 and automatically restarts power supply. Note that even if the automatic / manual return setting is changed during operation, it will not be reflected unless the system operation is stopped and restarted.
  • step S10 to step S18 is executed until the self-sustained operation of the power storage system 100 ends (Y in S19) (N in S19). Although shown at the bottom in FIG. 7 for the sake of convenience, the operation end determination process is executed at any time.
  • FIG. 8 is a flowchart for explaining a control example of components other than the sixth switch S6 in the self-sustaining operation mode by the power storage system 100 according to the embodiment of the present invention.
  • the monitoring data acquisition part 32 acquires monitoring data, such as a voltage value of a storage battery cell, from the storage battery module 10 (S20).
  • the SOC calculation unit 34 calculates the SOC of the storage battery module 10 based on the monitoring data (S21).
  • the power generation control unit 36 acquires the power generation information of the solar power generation system 300 from the control circuit 42 of the PV power conditioner 40 (S22).
  • the switch control unit 39 compares the calculated SOC with the first set value for preventing overdischarge (S23). When the SOC is greater than or equal to the first set value (N in S23), the process proceeds to step S20. When the SOC is less than the first set value (Y in S23), the power generation control unit 36 determines whether or not the solar power generation system 300 is generating power (S24). In the power generation state (N in S24), the process proceeds to step S20. In the non-power generation state (Y in S24), the fan / heater control unit 38 controls the heater 70 to be inactive (S25). When the heater 70 is operating, it is stopped, and when it is not operating, the state is maintained. The fan / heater control unit 38 may also control the storage battery fan 60 and the inverter fan 50 to be inactive.
  • step S25 mainly assumes a situation where power can be secured from other than the storage battery module 10 and the solar power generation system 300.
  • the power generation control unit 36 causes the PV power conditioner 40 to shift to the sleep mode by including an instruction to shift to the sleep mode in the packet signal transmitted to the PV power conditioner 40 (S26). Thereby, the power consumption of the PV power conditioner 40 can be reduced.
  • the control circuit 42 of the PV power conditioner 40 may shift the PV power conditioner 40 to the sleep mode by self-determination.
  • the charging / discharging control unit 35 causes the storage battery power conditioner 20 to shift to the sleep mode by including an instruction to shift to the sleep mode in the packet signal transmitted to the storage battery power conditioner 20 (S27). Since the discharge from the storage battery module 10 is prohibited and neither the grid power supply 200 nor the solar power generation system 300 is charged, the storage battery power conditioner 20 is caused to sleep. Thereby, the power consumption of the storage battery power conditioner 20 can be reduced.
  • the control circuit 42 of the PV power conditioner 40 returns the PV power conditioner 40 from the sleep mode to the normal mode (S29).
  • the charge / discharge control unit 35 detects the resumption of power generation of the photovoltaic power generation system 300 with reference to the packet signal received from the PV power conditioner 40, the charge / discharge control unit 35 returns the storage battery power conditioner 20 from the sleep mode to the normal mode (S30). .
  • step S20 to step S30 is executed until the self-sustained operation of the power storage system 100 ends (Y in S31) (N in S31).
  • Y in S31 the self-sustained operation of the power storage system 100 ends
  • N in S31 N in S31.
  • FIG. 8 for the sake of convenience, it is drawn at the bottom, but the determination process for the end of operation is executed at any time.
  • FIG. 9 is a flowchart for explaining a communication interval switching process between the storage battery management device 30 and the PV power conditioner 40 in the power storage system 100 according to the embodiment of the present invention.
  • the communication unit 31 of the storage battery management device 30 decreases the communication frequency between the storage battery management device 30 and the PV power conditioner 40 (S36). That is, the communication interval is lengthened.
  • the PV power conditioner 40 is normally in the sleep mode, so the communication interval becomes longer.
  • the communication unit 31 of the storage battery management device 30 sets the communication frequency between the storage battery management device 30 and the PV power conditioner 40 to normal (S37).
  • the processing from step S35 to step S37 is repeatedly executed (N in S38).
  • the solar power generation system 300 when the solar power generation system 300 is linked to the power storage system 100 connected to the system power supply, the solar power generation system 300 is connected to the power storage system 100 via the PV power conditioner 40. Connect to. That is, it connects with the storage battery module 10 and the system power supply 200 with an alternating current output.
  • the photovoltaic power generation system 300 it is conceivable to connect the photovoltaic power generation system 300 to the direct current side of the storage battery power conditioner 20, but in this case, the output range of the photovoltaic power generation system 300 needs to be within the rated range of the storage battery power conditioner 20. is there.
  • the photovoltaic power generation system 300 is added to the existing power storage system 100, it is necessary to select the photovoltaic power generation system 300 that falls within the rated range of the storage battery power conditioner 20. Further, it may be impossible to link the existing power storage system 100 to the existing solar power generation system 300.
  • the solar power generation system 300 When the solar power generation system 300 is connected to the direct current side of the storage battery power conditioner 20, it is conceivable to install a DC-DC converter between the solar power generation system 300 and the storage battery power conditioner 20. In this case, the cost for installing the DC-DC converter increases, and conversion loss occurs not only in the storage battery power conditioner 20 but also in the DC-DC converter, so that the energy efficiency is lowered.
  • the PV power conditioner 40 by providing the PV power conditioner 40, various types of photovoltaic power generation systems 300 can be connected to the power storage system 100 without limitation of the output range.
  • a DC-DC converter is unnecessary, it is possible to avoid a reduction in energy efficiency.
  • FIG. 10 is a diagram for explaining a power storage system 100 according to a first modification of the present invention.
  • the power storage system 100 according to the first modification has a configuration in which the fifth switch S5 and the sixth switch S6 of the power storage system 100 illustrated in FIG. 1-3 are omitted.
  • the sixth switch S6 connected in series with the third breaker B3 is used as an element for cutting off the power supply to the specific load 500.
  • the sixth switch S6 is turned off (open in the case of a relay) as described above, it is turned on (closed in the case of a relay) when the SOC of the storage battery module 10 exceeds the second set value for return, It can be automatically restored.
  • the switch control unit 39 closes the third breaker B3 when stopping the power supply to the specific load 500.
  • the third breaker B3 has a coil and a contact, and the coil is excited with overcurrent detection as a trigger to close the contact.
  • the third breaker B3 has another coil that is energized by external control.
  • the switch control unit 39 can close the contact by controlling the current to flow through the other coil.
  • the cost of the entire power storage system 100 can be reduced.
  • the breaker must be manually reset once it is opened. That is, when the breaker trips, the breaker needs to be restarted.
  • the switch control unit 39 displays on the display device 700 that the breaker can be returned.
  • the sixth switch S6 may be a reset switch. In this case, the sixth switch S6 is turned on by pressing the reset switch.
  • the electric power stored in the storage battery module 10 in the power storage system 100 is used for so-called peak cut to equalize the amount of electric power used by daytime, or backup when the system power supply 200 fails. It is used as a power source.
  • the storage battery module 10 is used to assist the system power supply 200 which is a commercial power supply.
  • the solar power generation system 300 is also used for assisting the system power supply 200 which is a commercial power supply, like the storage battery module 10.
  • the electric power generated by the solar power generation system 300 is also used for charging the storage battery module 10.
  • DC power generated by the solar cell 310 in the solar power generation system 300 is converted into AC power by the inverter 41.
  • the inverter 41 functions as a power conversion device that converts the power generated by the solar cell 310.
  • the electric power converted by the inverter 41 is supplied to the AC current path described above. Since the solar cell 310 generates power using sunlight, the power generation amount of the solar cell 310 varies with time. Further, the solar power generation system 300 is not necessarily used together with the power storage system 100, and there is a system in which the solar power generation system 300 does not exist.
  • the photovoltaic power generation system 300 is a system different from the power storage system 100, and the cooperation between the two is important. For example, when there is an output of the solar power generation system 300 and the power storage system 100 discharges the storage battery module 10 assuming that there is no output of the solar power generation system 300, power exceeding the rating may be output to the alternating current path. For this reason, the power storage system 100 according to the second modification detects whether or not the photovoltaic power generation system 300 can coexist and whether or not communication with the photovoltaic power generation system 300 is actually possible.
  • the power storage system 100 according to the second modification will be specifically described.
  • FIG. 11 is a diagram for explaining a storage battery management device 130 according to a second modification of the present invention.
  • the storage battery management device 130 according to the second modification is used in place of the storage battery management device 30 in the power storage system 100 shown in FIG.
  • the power storage system 100 according to the second modification has the same configuration as the power storage system 100 according to the above-described embodiment pair, except for the storage battery management device 130. Therefore, the description overlapping with the power storage system 100 according to the embodiment is omitted or simplified below.
  • the storage battery management device 130 includes a communication unit 31, a monitoring data acquisition unit 32, a user input reception unit 33, an SOC calculation unit 34, a charge / discharge control unit 35, and a power generation control unit 36.
  • the storage battery management device 130 further includes an availability setting unit 136, an availability storage unit 138, and a notification unit 140 in order to cooperate with the solar power generation system 300 described above.
  • the user input reception unit 33 acquires a user instruction for setting to use the solar power generation system 300 via the operation unit 800.
  • the availability setting unit 136 stores in the availability storage unit 138 that the use of the inverter 41 is invalid.
  • the use permission setting unit 136 can effectively use the inverter 41 that is a power conversion device that converts the power generated by the solar cell 310. Something may be stored in the availability storage unit 138.
  • the usability storage unit 138 is a memory that stores a setting of whether the use of the inverter 41 is valid or invalid. For example, 1 is used when the use of the inverter 41 is valid, and 0 is used when the use of the inverter 41 is invalid. This can be realized by using a non-volatile memory that stores information indicating validity or invalidity.
  • the communication unit 31 attempts communication connection with the inverter 41 and establishes communication if connection with the inverter 41 is possible.
  • the usability setting unit 136 uses the inverter 41 stored in the usability storage unit 138. Change the setting automatically to enabled. Thereby, it can prevent that the electric power more than a rating is supplied to an alternating current path by discharging the storage battery module 10 as what does not have the output of the solar power generation system 300.
  • the user or contractor of the power storage system 100 can omit changing the setting manually, and usability is improved.
  • the charge / discharge control unit 35 suppresses the discharge amount of the storage battery module 10. For this reason, even if the photovoltaic power generation system 300 does not exist, when the use of the inverter 41 is set to be effective, it may not be possible to supply sufficient power from the storage battery module 10. Further, even when the solar power generation system 300 exists, when there is no power generation of the solar cell 310 at night or the like, the power of the inverter 41 is turned off and the communication with the communication unit 31 is disconnected. There is also.
  • the notification unit 140 disconnects the communication because the communication unit 31 cannot establish communication with the inverter 41 within a predetermined time. If so, this is output to the display device 700 as an error notification. Thereby, the user can recognize troubles of the solar power generation system 300 such as a failure of the solar battery 310.
  • the “predetermined time” refers to whether the inverter 41 is turned off and communication with the communication unit 31 is disconnected because there is no power generation of the solar cell 310 at night, or a failure of the inverter 41 or the like. This is a standby time that is set to determine whether the communication with the communication unit 31 is disconnected for the reason. If communication with the communication unit 31 is cut off due to a failure of the inverter 41 or the like, the communication with the communication unit 31 is unlikely to be recovered unless some measure is taken.
  • the “predetermined time” may be set to a time longer than the length of one night, and is 24 hours as an example.
  • the use permission setting unit 136 sets the use of the inverter 41 to invalid. For example, when the user desires to disable the use of the solar power generation system 300 for some reason, such as a failure of the solar battery 310, the setting can be easily changed.
  • the solar power generation system 300 is not necessarily used together with the power storage system 100. If the use of the inverter 41 is set to be valid as an initial setting at the time of shipment of the power storage system 100, when the power storage system 100 is installed in a system where the solar power generation system 300 does not exist, the notification unit 140 causes the inverter 41 to An error notification is displayed because communication is not possible even though the use of is enabled. Therefore, in the usability storage unit 138 according to the second modification, the use of the inverter 41 is set to be invalid as an initial setting at the time of shipment. Thereby, when the power storage system 100 is installed when the solar power generation system 300 is not used, the notification unit 140 does not display an error notification.
  • the availability setting unit 136 causes the availability storage unit 138 to be triggered by the communication unit 31 receiving communication data from the inverter 41.
  • the stored use setting of the inverter 41 is automatically and effectively changed. Thereby, the user or the installer of the electrical storage system 100 can also save the effort which changes the use setting of the electrical storage system 100 at the time of installation.
  • FIG. 12 is a flowchart for explaining the flow of the automatic change process to the usable setting of the inverter 41 in the storage battery management device 130 according to the second modification.
  • the availability setting unit 136 refers to the availability storage unit 138 and confirms the availability setting of the inverter 41 that is the power converter (S50). When the availability setting of the inverter 41 is valid (Y in S51), the process returns to step S50, and the availability setting unit 136 continues the confirmation process of the availability setting of the inverter 41.
  • the communication unit 31 verifies whether communication with the inverter 41 can be established (S52).
  • the availability setting unit 136 validates the usage setting of the inverter 41, and the availability storage unit 138. (S54).
  • the usability setting unit 136 validates the use setting of the inverter 41 or when the communication unit 31 cannot receive the data transmitted from the inverter 41 (N in S53)
  • the processing in this flowchart ends.
  • FIG. 13 is a flowchart for explaining the flow of error notification processing in the storage battery management device 130 according to the second modification.
  • the availability setting unit 136 refers to the availability storage unit 138 and confirms the availability setting of the inverter 41 that is the power converter (S60). When the availability setting of the inverter 41 is invalid (N in S61), the process returns to step S60, and the availability setting unit 136 continues the confirmation process of the availability setting of the inverter 41.
  • the communication unit 31 verifies whether communication with the inverter 41 can be established (S62).
  • the notification unit 140 uses the inverter 41 availability setting that is valid. The user is notified of the inability to communicate with the terminal 41 as an error (S64).
  • FIG. 14 is a flowchart for explaining the flow of the manual change process to the usable setting of the inverter 41 in the storage battery management device 130 according to the second modification.
  • the user input reception unit 33 waits for a user instruction regarding the availability setting of the photovoltaic power generation system 300, that is, the availability setting of the inverter 41 that is the power converter (S70). While the user input receiving unit 33 does not acquire the invalid setting for using the inverter 41 (N in S71), the user input receiving unit 33 returns to step S70 and continues the standby process of the user instruction.
  • the usability setting unit 136 invalidates the use setting of the inverter 41 and stores it in the usability storage unit 138 (S72).
  • the processing in this flowchart ends.
  • FIGS. 15A to 15D are diagrams showing examples of display screens that the notification unit 140 displays on the display device 700.
  • the display device 700 displays various setting screens, status information of the storage battery module 10 and the photovoltaic power generation system 300 under the control of the storage battery management device 130. In this sense, the display device 700 functions as a display unit of the storage battery management device 130.
  • the storage battery management device 130 and the display device 700 together function as a display device that displays the state of the solar power generation system 300.
  • the display device 700 can be realized by using known light emitting elements and display devices such as an LCD (Liquid Crystal Display), an LED (Light Emitting Diode), and an organic EL (Electro-Luminescence) panel.
  • LCD Liquid Crystal Display
  • LED Light Emitting Diode
  • organic EL Electro-Luminescence
  • FIG. 15A is a diagram showing a screen displayed on the display device 700 when the use setting of the inverter 41 is valid.
  • this is a screen showing the changed use setting that the notification unit 140 displays on the display device 700.
  • FIG. 15B is a diagram showing a screen displayed on the display device 700 when the use setting of the inverter 41 is invalid.
  • the usability storage unit 138 is set to disable the use of the inverter 41 as an initial setting at the time of shipment.
  • FIG. 15B shows, for example, a screen that the notification unit 140 displays on the display device 700 when the usability storage unit 138 is initially set.
  • FIG. 15C is an example of a screen showing the user whether or not to initialize the use setting of the inverter 41.
  • the user can instruct the usability setting unit 136 via the operation unit 800 whether to initialize the use setting of the inverter 41.
  • the usability setting unit 136 invalidates the use setting of the inverter 41.
  • the notification unit 140 causes the display device 700 to display the screen illustrated in FIG.
  • FIG. 15D is a diagram illustrating an example of an error notification screen that the notification unit 140 causes the display device 700 to display. More specifically, FIG. 15D shows the notification unit 140 when the communication unit 31 cannot receive the data transmitted from the inverter 41 within a predetermined time when the availability setting of the inverter 41 is valid. The screen displayed on the apparatus 700 is shown.
  • the setting of the cooperation between the storage battery module 10 and the solar power generation system 300 is performed. Can be easily.
  • the solar power generation system 300 when the solar power generation system 300 is linked to the power storage system 100 connected to the system power supply 200, the solar power generation system 300 is connected to the power storage system 100 via the PV power conditioner 40. Connect to. That is, it was assumed that the storage battery module 10 and the system power supply 200 were connected with an AC output.
  • the second modification of the present invention can also be applied to a system in which the photovoltaic power generation system 300 is connected to the direct current side of the storage battery power conditioner 20.
  • the DC-DC converter that converts the DC power generated by the solar cell 310 functions as the power conversion device according to the present invention.
  • the power storage system according to the present invention can be linked to a power generation apparatus that generates power based on renewable energy other than the solar power generation system 300.
  • a wind power generator or a micro hydroelectric generator with a direct current output is applicable.
  • the invention according to the present embodiment may be specified by the items described below.
  • a storage battery A first inverter that converts AC power to DC power when charging the storage battery, and converts DC power to AC power when discharging from the storage battery; A second inverter that converts DC power generated by a power generation device that generates power based on renewable energy into AC power;
  • a power storage system comprising: [Item 1-2] The AC current path is connected to a predetermined specific load that can receive power supply from the storage battery or the power generation device preferentially in the event of a power failure of the system power supply. 2.
  • the power storage system according to 1.
  • [Item 1-3] A heater, a fan, and a management device; 3. The power storage system according to item 1-1 or 1-2, wherein the management device operates the heater and the fan when the storage battery is heated. [Item 1-4] 4. The power storage system according to item 1-3, wherein the management device controls the heater and the fan to be non-operating in a state where the storage battery is not discharged during a power failure.
  • a management device for managing the storage battery acquires information indicating whether or not the power generation device is generating power from the second inverter, and the power generation device is not generating power in a state in which the storage battery is not discharged at the time of a power failure of the system power supply
  • the power storage system according to item 1-1 or 1-2, wherein the power source of the first inverter and the second inverter is turned off, or the first inverter and the second inverter are caused to sleep.
  • a charge / discharge control unit for managing charge / discharge of the storage battery for assisting the commercial power supply;
  • a communication unit that communicates with a power conversion device that converts power generated by a power generation device that generates power based on renewable energy; and
  • An availability setting unit that sets whether the use of the power conversion device is valid or invalid, When the use of the power conversion device is set to be invalid and the communication unit receives data from the power conversion device, the availability setting unit is set to enable use of the power conversion device.
  • a storage battery management device characterized by changing to [Item 2-2]
  • the availability setting unit sets the use of the power conversion device as valid, and the communication unit is disconnected from the power conversion device, a notification to output to that effect to the display device
  • the storage battery management device according to item 2-1, further comprising a section.
  • [Item 2-3] A user input receiving unit for acquiring a user instruction for setting of use of the power conversion device in the availability setting unit; The availability setting unit sets the use of the power converter as invalid when the user input reception unit receives an instruction to invalidate the use of the power converter. Or the storage battery management apparatus as described in 2-2.
  • a charge / discharge control unit for managing charge / discharge of the storage battery;
  • a communication unit that communicates with a power conversion device that converts power generated by a power generation device that generates power based on renewable energy; and
  • An availability setting unit for setting whether the use of the power converter is valid or invalid;
  • a power storage system comprising a display unit that displays setting of use of the power conversion device, When the use of the power conversion device is set to be invalid and the communication unit receives data from the power conversion device, the availability setting unit is set to enable use of the power conversion device.
  • the said display part displays the use setting after a change, when the said availability setting part changes the use setting of the said power converter device,
  • the display apparatus characterized by the above-mentioned.
  • [Item 2-5] In the case where the usability setting unit sets the use of the power conversion device as valid, if the communication unit is disconnected from the power conversion device, the fact is output to the display unit.
  • the storage battery stem further comprising a notification unit, Item 5.
  • the display device according to Item 2-4 which displays the fact.
  • the display device according to item 2-4 or 2-5 wherein the display device is displayed.
  • 100 power storage system 110 housing, 111 first air hole, 112 handle, 113 second air hole, 114 third air hole, 115, 116 inlet hole, 10 storage battery module, 11 storage battery cell, 12 voltage sensor, 13 current sensor , 14 temperature sensor, 20 storage battery power conditioner, 21 bidirectional inverter, 22 control circuit, 30, 130 storage battery management device, 31 communication unit, 32 monitoring data acquisition unit, 33 user input reception unit, 34 SOC calculation unit, 35 charge Discharge control unit, 36 Power generation control unit, 37 Temperature control unit, 38 Fan / heater control unit, 39 Switch control unit, 40 PV power conditioner, 41 inverter, 42 control circuit, 50 inverter , 60 storage battery fan, 70 heater, 200 system power supply, 300 solar power generation system, 400 general load, 500 specific load, 600 temperature sensor, S1 first switch, S2 second switch, S3 third switch, S4 fourth switch , S5 5th switch, S6 6th switch, S7 7th switch, S8 8th switch, S9 9th switch, B1 1st breaker, B2 2nd
  • the present invention can be used for a power storage system that cooperates with a solar power generation system.

Abstract

A charge and discharge control unit (35) manages charging and discharging of a storage battery module. A communication unit (31) communicates with an inverter (41) that is a power conversion device for converting power generated by a solar battery (310). An availability setting unit (136) sets whether the use of the inverter (41) is valid or invalid: when the use of the inverter (41) is set to be invalid, the availability setting unit (136) changes the setting so that the use of the inverter (41) becomes valid when the communication unit (31) receives data from the inverter (41).

Description

蓄電池管理装置および表示装置Storage battery management device and display device
　本発明は、蓄電池管理装置および表示装置に関する。 The present invention relates to a storage battery management device and a display device.
　近年、系統電源に接続された蓄電システムに太陽光発電システムを連携させるシステムが開発されている。蓄電池は直流であり系統電源は交流であるため、両者の間にはインバータが設けられる。 Recently, a system that links a photovoltaic power generation system to a power storage system connected to a system power supply has been developed. Since the storage battery is a direct current and the system power supply is an alternating current, an inverter is provided between them.
特公平６－１０６０１２号公報Japanese Examined Patent Publication No. 6-106021
　商用電源である系統電源を補助する際に、再生可能エネルギーをもとに発電する発電システムからも電力が供給されるか否かによって、蓄電池が供給すべき電力は変化しうる。このため、蓄電池システムが、再生可能エネルギーをもとに発電する発電システムと共存しているか否かを簡便に設定することが望まれている。 When assisting the grid power supply, which is a commercial power supply, the power to be supplied by the storage battery can vary depending on whether or not power is supplied from a power generation system that generates power based on renewable energy. For this reason, it is desired to simply set whether or not the storage battery system coexists with a power generation system that generates power based on renewable energy.
　本発明はこうした状況に鑑みなされたものであり、その目的は、商用電源である系統電源を補助するための蓄電池システムにおいて、蓄電池と再生可能エネルギーをもとに発電する発電システムとの連携の設定を容易にする技術を提供することにある。 The present invention has been made in view of such a situation, and an object of the present invention is to set up cooperation between a storage battery and a power generation system that generates power based on renewable energy in a storage battery system for assisting a system power supply that is a commercial power supply. It is to provide a technology that facilitates the process.
　上記課題を解決するために、本発明のある態様の蓄電池管理装置は、蓄電池の充放電を管理する充放電制御部と、再生可能エネルギーをもとに発電する発電装置により発電された電力を変換する電力変換装置と通信する通信部と、電力変換装置の使用が有効か無効かを設定する使用可否設定部とを備える。ここで使用可否設定部は、電力変換装置の使用が無効の設定となっている場合に、通信部が電力変換装置からデータを受信したときは、電力変換装置の使用を有効の設定に変更する。 In order to solve the above problems, a storage battery management device according to an aspect of the present invention converts power generated by a charge / discharge control unit that manages charge / discharge of a storage battery and a power generation device that generates power based on renewable energy. A communication unit that communicates with the power conversion device to perform, and an availability setting unit that sets whether the use of the power conversion device is valid or invalid. Here, when the use of the power conversion device is set to be invalid and the communication unit receives data from the power conversion device, the availability setting unit changes the use of the power conversion device to a valid setting. .
　本発明の別の態様は、表示装置である。この表示装置は、蓄電池の充放電を管理する充放電制御部と、再生可能エネルギーをもとに発電する発電装置により発電された電力を変換する電力変換装置と通信する通信部と、電力変換装置の使用が有効か無効かを設定する使用可否設定部と、電力変換装置の使用の設定を表示する表示部とを備える蓄電システムにおける表示装置である。ここで使用可否設定部は、電力変換装置の使用が無効の設定となっている場合に、通信部が前記電力変換装置からデータを受信したときは、電力変換装置の使用を有効の設定に変更し、表示部は、使用可否設定部が前記電力変換装置の使用設定を変更した場合、変更後の使用設定を表示する。 Another aspect of the present invention is a display device. This display device includes a charge / discharge control unit that manages charge / discharge of a storage battery, a communication unit that communicates with a power conversion device that converts power generated by a power generation device that generates power based on renewable energy, and a power conversion device It is a display apparatus in an electrical storage system provided with the use availability setting part which sets whether use of is effective or invalid, and the display part which displays the setting of use of a power converter device. Here, the availability setting unit changes the use of the power conversion device to a valid setting when the communication unit receives data from the power conversion device when the use of the power conversion device is invalid. And a display part displays the use setting after a change, when the usability setting part changes the use setting of the said power converter device.
　本発明によれば、商用電源である系統電源を補助するための蓄電池システムにおいて、蓄電池と再生可能エネルギーをもとに発電する発電システムとの連携の設定を容易にすることができる。 According to the present invention, in a storage battery system for assisting a system power supply that is a commercial power supply, it is possible to easily set the cooperation between the storage battery and a power generation system that generates power based on renewable energy.
本発明の実施の形態に係る蓄電システムを説明するための図である。It is a figure for demonstrating the electrical storage system which concerns on embodiment of this invention. 本発明の実施の形態に係る蓄電システムの系統連系モードを説明するための図である。It is a figure for demonstrating the grid connection mode of the electrical storage system which concerns on embodiment of this invention. 本発明の実施の形態に係る蓄電システムの自立運転モードを説明するための図である。It is a figure for demonstrating the self-sustained operation mode of the electrical storage system which concerns on embodiment of this invention. 図４（ａ）－（ｄ）は、本発明の実施の形態に係る蓄電システムの物理的な構成例を説明するための図である。FIGS. 4A to 4D are diagrams for explaining a physical configuration example of the power storage system according to the embodiment of the present invention. 筐体を右側面から見た図である。It is the figure which looked at the housing | casing from the right side surface. 図１の蓄電システムの構成要素を説明するための機能ブロック図である。It is a functional block diagram for demonstrating the component of the electrical storage system of FIG. 本発明の実施の形態に係る蓄電システムによる、自立運転モードにおける第６スイッチの制御例を説明するためのフローチャートである。It is a flowchart for demonstrating the control example of the 6th switch in self-sustained operation mode by the electrical storage system which concerns on embodiment of this invention. 本発明の実施の形態に係る蓄電システムによる、自立運転モードにおける第６スイッチ以外の構成要素の制御例を説明するためのフローチャートである。It is a flowchart for demonstrating the example of control of components other than the 6th switch in self-sustained operation mode by the electrical storage system which concerns on embodiment of this invention. 本発明の実施の形態に係る蓄電システムにおける、蓄電池管理装置とＰＶパワーコンディショナ間の通信間隔切替処理を説明するためのフローチャートである。It is a flowchart for demonstrating the communication space | interval switching process between a storage battery management apparatus and PV power conditioner in the electrical storage system which concerns on embodiment of this invention. 本発明の変形例に係る蓄電システムを説明するための図である。It is a figure for demonstrating the electrical storage system which concerns on the modification of this invention. 本発明の第２の変形例に係る蓄電池管理装置を説明するための図である。It is a figure for demonstrating the storage battery management apparatus which concerns on the 2nd modification of this invention. 第２の変形例に係る蓄電池管理装置における、インバータの使用可能設定への自動変更処理の流れを説明するフローチャートである。It is a flowchart explaining the flow of the automatic change process to the useable setting of an inverter in the storage battery management apparatus which concerns on a 2nd modification. 第２の変形例に係る蓄電池管理装置１３０における、エラー通知処理の流れを説明するフローチャートである。It is a flowchart explaining the flow of the error notification process in the storage battery management apparatus 130 which concerns on a 2nd modification. 第２の変形例に係る蓄電池管理装置における、インバータの使用可能設定への手動変更処理の流れを説明するフローチャートである。It is a flowchart explaining the flow of the manual change process to the useable setting of an inverter in the storage battery management apparatus which concerns on a 2nd modification. 図１５（ａ）－（ｄ）は、通知部が表示装置に表示させる表示画面の一例を示す図である。FIGS. 15A to 15D are diagrams illustrating an example of a display screen displayed on the display device by the notification unit.
　本発明の実施の形態は、系統電源に接続される蓄電システムであって、さらに太陽光発電システムと連携する蓄電システムに関する。当該蓄電システムは、例えば産業施設、公共施設、商業施設、オフィスビル、住居などに設置される。電力会社が時間帯別電気料金制度を採用している場合、夜間の時間帯の電気料金は、昼間の時間帯の電気料金よりも安く設定される。例えば、２３：００～翌日の７：００までの電気料金が他の時間帯より安く設定される。従って夜間に系統電源から蓄電池に充電し、蓄電池に蓄えられた電力を昼間に使用することにより電気料金を抑えることができる。電力会社側から見ると電力使用量が平準化されることになる。 The embodiment of the present invention relates to a power storage system connected to a system power supply, and further relates to a power storage system linked to a solar power generation system. The power storage system is installed in, for example, industrial facilities, public facilities, commercial facilities, office buildings, residences, and the like. When the electric power company adopts the electricity bill system by time zone, the electricity bill at night time is set lower than the electricity bill at daytime. For example, the electricity charge from 23:00 to 7:00 on the next day is set cheaper than other time zones. Therefore, the electricity charge can be suppressed by charging the storage battery from the system power supply at night and using the electric power stored in the storage battery during the daytime. From the power company side, the amount of power used will be leveled.
　蓄電池に蓄えられた電力は、系統電源が停電したとき特定負荷（例えば、電灯、エレベータ、コンピュータサーバなど）を動作させるためのバックアップ電源として用いられる。特定負荷は系統電源の停電時にて、優先的に蓄電池または太陽光発電システムから電力供給を受けることができる予め設定された負荷である。本明細書では、それ以外の負荷を一般負荷という。 The electric power stored in the storage battery is used as a backup power source for operating a specific load (for example, a light, an elevator, a computer server, etc.) when the system power supply fails. The specific load is a preset load that can receive power supply from the storage battery or the solar power generation system preferentially at the time of a power failure of the system power supply. In the present specification, other loads are referred to as general loads.
　図１は、本発明の実施の形態に係る蓄電システム１００を説明するための図である。実施の形態に係る蓄電システム１００は、蓄電池モジュール１０、蓄電池パワーコンディショナ２０、蓄電池管理装置３０、インバータファン５０、蓄電池ファン６０、第１スイッチＳ１～第９スイッチＳ９、第１ブレーカＢ１～第３ブレーカＢ３を備える。本実施の形態では第１スイッチＳ１～第９スイッチＳ９にリレーを使用することを想定する。なお、リレーの代わりにパワーＭＯＳＦＥＴなどの半導体スイッチを用いてもよい。 FIG. 1 is a diagram for explaining a power storage system 100 according to an embodiment of the present invention. The power storage system 100 according to the embodiment includes a storage battery module 10, a storage battery power conditioner 20, a storage battery management device 30, an inverter fan 50, a storage battery fan 60, a first switch S1 to a ninth switch S9, and a first breaker B1 to a third. A breaker B3 is provided. In the present embodiment, it is assumed that relays are used for the first switch S1 to the ninth switch S9. A semiconductor switch such as a power MOSFET may be used instead of the relay.
　系統電源２００は電力会社から供給される商用電源である。系統電源２００は、第２スイッチＳ２を介して蓄電池パワーコンディショナ２０と接続される。また第４スイッチＳ４、第５スイッチＳ５、第２ブレーカＢ２を介してＰＶパワーコンディショナ４０に接続される。蓄電池パワーコンディショナ２０とＰＶパワーコンディショナ４０間は、第２スイッチＳ２、第４スイッチＳ４、第５スイッチＳ５、第２ブレーカＢ２を介して、又は第３スイッチＳ３、第４スイッチＳ４、第５スイッチＳ５、第２ブレーカＢ２を介して接続される。 System power supply 200 is a commercial power supply supplied from an electric power company. The system power supply 200 is connected to the storage battery power conditioner 20 via the second switch S2. Moreover, it is connected to the PV power conditioner 40 through the fourth switch S4, the fifth switch S5, and the second breaker B2. Between the storage battery power conditioner 20 and the PV power conditioner 40, the second switch S2, the fourth switch S4, the fifth switch S5, the second breaker B2, or the third switch S3, the fourth switch S4, the fifth It is connected via the switch S5 and the second breaker B2.
　系統電源２００と蓄電池パワーコンディショナ２０間の経路、系統電源２００とＰＶパワーコンディショナ４０間の経路、蓄電池パワーコンディショナ２０とＰＶパワーコンディショナ４０間の経路は導通可能な構成である。それらの経路には交流電流が流れる。以下、それらの経路を総称して交流電流路という。 The path between the grid power supply 200 and the storage battery power conditioner 20, the path between the grid power supply 200 and the PV power conditioner 40, and the path between the storage battery power conditioner 20 and the PV power conditioner 40 are configured to be conductive. Alternating current flows through these paths. Hereinafter, these paths are collectively referred to as an alternating current path.
　蓄電池パワーコンディショナ２０は、第１スイッチＳ１及び第１ブレーカＢ１を介して蓄電池モジュール１０に接続される。太陽光発電システム３００は太陽電池３１０及びＰＶパワーコンディショナ４０を含み、ＰＶパワーコンディショナ４０は太陽電池３１０に接続される。 The storage battery power conditioner 20 is connected to the storage battery module 10 via the first switch S1 and the first breaker B1. The photovoltaic power generation system 300 includes a solar cell 310 and a PV power conditioner 40, and the PV power conditioner 40 is connected to the solar cell 310.
　蓄電池パワーコンディショナ２０は後述するように双方向インバータ２１（図６参照）を含む。双方向インバータ２１は、蓄電池モジュール１０に充電するとき交流電力から直流電力に変換し、蓄電池モジュール１０から放電するとき直流電力から交流電力に変換する。ＰＶパワーコンディショナ４０は後述するようにインバータ４１（図６参照）を含む。インバータ４１は、太陽光発電システム３００により発電された直流電力を交流電力に変換する。 The storage battery power conditioner 20 includes a bidirectional inverter 21 (see FIG. 6) as described later. The bidirectional inverter 21 converts AC power into DC power when charging the storage battery module 10, and converts DC power into AC power when discharging from the storage battery module 10. The PV power conditioner 40 includes an inverter 41 (see FIG. 6) as will be described later. The inverter 41 converts DC power generated by the solar power generation system 300 into AC power.
　蓄電池モジュール１０は充放電自在で繰り返し使用できる、パッケージ化された二次電池である。蓄電池モジュール１０は、直列または直並列接続された複数の蓄電池セルを含む。本実施の形態では蓄電池セルとしてリチウムイオン電池を使用することを想定する。なお、リチウムイオン電池の代わりにニッケル水素電池、鉛電池など他の種類の電池を使用してもよい。蓄電池モジュール１０は１個ないしは複数組み合わせて使用される。 The storage battery module 10 is a packaged secondary battery that can be freely charged and discharged and can be used repeatedly. The storage battery module 10 includes a plurality of storage battery cells connected in series or series-parallel. In the present embodiment, it is assumed that a lithium ion battery is used as the storage battery cell. Other types of batteries such as nickel metal hydride batteries and lead batteries may be used instead of lithium ion batteries. One or a plurality of storage battery modules 10 are used in combination.
　本実施の形態では６個の蓄電池モジュール１０を直列接続して使用することを想定する。直列接続された複数の蓄電池モジュール１０は、スイッチングユニットにより接続／切断制御される。なお複数の蓄電池モジュール１０を直並列接続して使用してもよい。蓄電池モジュール１０は系統電力または太陽光発電システム３００により発電された電力により充電される。 In this embodiment, it is assumed that six storage battery modules 10 are connected in series. The plurality of storage battery modules 10 connected in series are connected / disconnected by the switching unit. A plurality of storage battery modules 10 may be used in series-parallel connection. The storage battery module 10 is charged with grid power or power generated by the solar power generation system 300.
　太陽光発電システム３００は光起電力効果を利用した発電装置である。太陽光発電システム３００を構成する太陽電池にはシリコン系、化合物系、有機系のいずれを使用してもよい。 The solar power generation system 300 is a power generation device that uses the photovoltaic effect. Any of a silicon system, a compound system, and an organic system may be used for the solar battery constituting the solar power generation system 300.
　蓄電池パワーコンディショナ２０が蓄電池モジュール１０から出力される直流電力を交流電力に変換し、ＰＶパワーコンディショナ４０が太陽光発電システム３００により発電される直流電力を交流電力に変換することにより、系統電源２００、蓄電池モジュール１０、太陽光発電システム３００を単一の交流電流路でリンクできる。 The storage battery power conditioner 20 converts the DC power output from the storage battery module 10 into AC power, and the PV power conditioner 40 converts the DC power generated by the photovoltaic power generation system 300 into AC power. 200, the storage battery module 10, and the photovoltaic power generation system 300 can be linked by a single alternating current path.
　一般負荷４００は、系統電源２００と蓄電システム１００との間の経路上に接続される。特定負荷５００は交流電流路の内、第４スイッチＳ４と第５スイッチＳ５間のノードに、第６スイッチＳ６及び第３ブレーカＢ３を介して接続される。 General load 400 is connected on a path between system power supply 200 and power storage system 100. The specific load 500 is connected to a node between the fourth switch S4 and the fifth switch S5 in the AC current path via the sixth switch S6 and the third breaker B3.
　一般負荷４００及び特定負荷５００は、交流電流路から供給される交流電力を受けて動作する。系統電源２００の停電時、特定負荷５００は蓄電池モジュール１０及び太陽光発電システム３００の少なくとも一方から電源供給を受けることができるが、一般負荷４００は電源供給を受けることができない。 General load 400 and specific load 500 operate by receiving AC power supplied from an AC current path. At the time of a power failure of the system power supply 200, the specific load 500 can receive power supply from at least one of the storage battery module 10 and the photovoltaic power generation system 300, but the general load 400 cannot receive power supply.
　インバータファン５０は交流電流路の内、第４スイッチＳ４と第５スイッチＳ５間のノードに、第７スイッチＳ７を介して接続される。インバータファン５０は、蓄電池パワーコンディショナ２０の双方向インバータ２１を冷却するためのファンである。 The inverter fan 50 is connected to a node between the fourth switch S4 and the fifth switch S5 in the AC current path via the seventh switch S7. The inverter fan 50 is a fan for cooling the bidirectional inverter 21 of the storage battery power conditioner 20.
　蓄電池ファン６０は交流電流路の内、第４スイッチＳ４と第５スイッチＳ５間のノードに、第９スイッチＳ９を介して接続される。蓄電池ファン６０は、蓄電池モジュール１０の冷却時および加温時に動作させるためのファンである。 The storage battery fan 60 is connected to a node between the fourth switch S4 and the fifth switch S5 in the AC current path via the ninth switch S9. The storage battery fan 60 is a fan that is operated when the storage battery module 10 is cooled and heated.
　ヒータ７０は交流電流路の内、第４スイッチＳ４と第５スイッチＳ５間のノードに、第８スイッチＳ８を介して接続される。ヒータ７０は蓄電池モジュール１０を加熱するためのヒータであり、蓄電池モジュール１０内の蓄電池セルの温度を上昇させるために使用される。 The heater 70 is connected to a node between the fourth switch S4 and the fifth switch S5 in the AC current path via the eighth switch S8. The heater 70 is a heater for heating the storage battery module 10 and is used for increasing the temperature of the storage battery cell in the storage battery module 10.
　温度センサ６００は外気温を環境温度として検出し、蓄電池管理装置３０に出力する。温度センサ６００には例えば、サーミスタを使用できる。 The temperature sensor 600 detects the outside air temperature as the environmental temperature and outputs it to the storage battery management device 30. For example, a thermistor can be used as the temperature sensor 600.
　蓄電池管理装置３０は主に、蓄電池モジュール１０を管理するための装置である。蓄電池管理装置３０と蓄電池パワーコンディショナ２０間、蓄電池管理装置３０とＰＶパワーコンディショナ４０間はそれぞれメタル線を用いた通信線で接続される。それらの間ではＲＳ－２３２Ｃ、ＲＳ－４８５などのシリアル通信規格に準拠した通信が実行される。通信線には光ファイバを用いることにより装置間を絶縁する。 The storage battery management device 30 is mainly a device for managing the storage battery module 10. The storage battery management device 30 and the storage battery power conditioner 20 are connected to each other, and the storage battery management device 30 and the PV power conditioner 40 are connected to each other by a communication line using a metal wire. Between them, communication conforming to serial communication standards such as RS-232C and RS-485 is executed. The communication lines are insulated from each other by using optical fibers.
　また蓄電池管理装置３０は蓄電池モジュール１０と、光ファイバを用いた通信線で接続される。また蓄電池管理装置３０は第７スイッチＳ７～第９スイッチＳ９のそれぞれと、メタル配線を用いた通信線で接続される。蓄電池管理装置３０は、第７スイッチＳ７～第９スイッチＳ９のオン・オフを制御することで、インバータファン５０等を間接的に制御する。蓄電池管理装置３０の詳細な動作は後述する。なお第１スイッチＳ１～第６スイッチＳ６、第１ブレーカＢ１～第３ブレーカＢ３のそれぞれは、蓄電池パワーコンディショナ２０とメタル配線を用いた通信線で接続される。これらは、蓄電池管理装置３０から蓄電池パワーコンディショナ２０に対する指示、あるいは、蓄電池パワーコンディショナ２０独自の判断に基づき、蓄電池パワーコンディショナ２０内の後述する制御回路２２（図６参照）により制御される。 Further, the storage battery management device 30 is connected to the storage battery module 10 through a communication line using an optical fiber. In addition, the storage battery management device 30 is connected to each of the seventh switch S7 to the ninth switch S9 by a communication line using metal wiring. The storage battery management device 30 indirectly controls the inverter fan 50 and the like by controlling on / off of the seventh switch S7 to the ninth switch S9. Detailed operation of the storage battery management device 30 will be described later. Each of the first switch S1 to the sixth switch S6 and the first breaker B1 to the third breaker B3 is connected to the storage battery power conditioner 20 through a communication line using metal wiring. These are controlled by a control circuit 22 (see FIG. 6), which will be described later, in the storage battery power conditioner 20 based on an instruction from the storage battery management device 30 to the storage battery power conditioner 20 or based on a judgment unique to the storage battery power conditioner 20. .
　実施の形態に係る蓄電システム１００は、系統連系モードまたは自立運転モードのいずれかで運転される。自立運転モードは基本的に、系統電源２００の停電時に選択される。 The power storage system 100 according to the embodiment is operated in either the grid connection mode or the independent operation mode. The self-sustained operation mode is basically selected at the time of power failure of the system power supply 200.
　図２は、本発明の実施の形態に係る蓄電システム１００の系統連系モードを説明するための図である。系統連系モードでは図２に示すように、蓄電池パワーコンディショナ２０内の制御回路２２は第２スイッチＳ２をオン、第３スイッチＳ３をオフに制御し、第４スイッチＳ４を、第３スイッチ側ではなく系統電源側の端子に接続するよう制御する。系統連系モードでは系統電源２００、太陽光発電システム３００、蓄電池モジュール１０が単一の交流電流路ＡＰ（太線参照）を介して導通する。 FIG. 2 is a diagram for explaining a grid interconnection mode of power storage system 100 according to the embodiment of the present invention. In the grid connection mode, as shown in FIG. 2, the control circuit 22 in the storage battery power conditioner 20 controls the second switch S2 to be on, the third switch S3 to be off, and the fourth switch S4 to the third switch side. Control to connect to the terminal on the system power supply side instead. In the grid connection mode, the grid power supply 200, the photovoltaic power generation system 300, and the storage battery module 10 are conducted through a single AC current path AP (see thick line).
　系統連系モードにて蓄電池モジュール１０から放電する場合、蓄電池パワーコンディショナ２０の双方向インバータ２１は、系統電源２００の周波数に同期した周波数および位相で交流電流路ＡＰに電流を流す。 When discharging from the storage battery module 10 in the grid connection mode, the bidirectional inverter 21 of the storage battery power conditioner 20 causes a current to flow through the AC current path AP at a frequency and phase synchronized with the frequency of the system power supply 200.
　図３は、本発明の実施の形態に係る蓄電システム１００の自立運転モードを説明するための図である。自立運転モードでは図３に示すように、蓄電池パワーコンディショナ２０内の制御回路２２は、第２スイッチＳ２をオフ、第３スイッチＳ３をオンに制御し、第４スイッチＳ４を、系統電源側ではなく第３スイッチ側の端子に接続するよう制御する。自立運転モードでは太陽光発電システム３００及び蓄電池モジュール１０は系統電源２００から電気的に切り離される。 FIG. 3 is a diagram for explaining a self-sustaining operation mode of power storage system 100 according to the embodiment of the present invention. In the self-sustaining operation mode, as shown in FIG. 3, the control circuit 22 in the storage battery power conditioner 20 controls the second switch S2 to be turned off and the third switch S3 to be turned on, and the fourth switch S4 is turned on the system power supply side. Control to connect to the terminal on the third switch side. In the self-sustaining operation mode, the photovoltaic power generation system 300 and the storage battery module 10 are electrically disconnected from the system power supply 200.
　自立運転モードにて蓄電池モジュール１０から放電する場合、蓄電池パワーコンディショナ２０の双方向インバータ２１は、系統電源２００から自立した周波数および位相で交流電流路ＡＰに電流を流す。自立運転モードで形成される交流電流路ＡＰ（太線参照）には特定負荷５００は電気的に接続されるが、一般負荷４００は電気的に遮断される。従って停電時に、特定負荷５００にのみ、蓄電池モジュール１０に蓄えられた電力および太陽光発電システム３００により発電された電力を供給できる。 When discharging from the storage battery module 10 in the self-sustained operation mode, the bidirectional inverter 21 of the storage battery power conditioner 20 causes a current to flow from the system power supply 200 to the AC current path AP at a frequency and phase independent from each other. The specific load 500 is electrically connected to the alternating current path AP (see thick line) formed in the self-sustained operation mode, but the general load 400 is electrically cut off. Therefore, the power stored in the storage battery module 10 and the power generated by the solar power generation system 300 can be supplied only to the specific load 500 at the time of a power failure.
　図４（ａ）－（ｄ）は、本発明の実施の形態に係る蓄電システム１００の物理的な構成例を説明するための図である。図１－図３にて点線で囲まれた蓄電システム１００の構成部材は、開閉式の扉を備える筐体１１０に収納される。図４（ａ）は筐体１１０を天面１１０ｔから見た図を、図４（ｂ）は筐体１１０を正面１１０ｆから見た図を、図４（ｃ）は筐体１１０を底面１１０ｂから見た図を、図４（ｄ）は筐体１１０を右側面１１０ｓから見た図をそれぞれ示す。 FIGS. 4A to 4D are diagrams for explaining a physical configuration example of the power storage system 100 according to the embodiment of the present invention. The components of the power storage system 100 surrounded by a dotted line in FIGS. 1 to 3 are housed in a housing 110 having an openable door. 4A is a view of the housing 110 viewed from the top surface 110t, FIG. 4B is a view of the housing 110 viewed from the front surface 110f, and FIG. 4C is a view of the housing 110 viewed from the bottom surface 110b. FIG. 4D is a view of the housing 110 viewed from the right side 110s.
　筐体１１０は縦長のボックスであり、筐体１１０内の下部に蓄電池モジュール１０が配置される。本実施の形態では６個の蓄電池モジュール１０が縦置きに並べて配置される。図示しないが蓄電池モジュール１０の上に、蓄電池管理装置３０が配置され、その上に蓄電池パワーコンディショナ２０、第１ブレーカＢ１～第３ブレーカＢ３が配置される。このように蓄電池パワーコンディショナ２０の双方向インバータ２１は、蓄電池モジュール１０より天面側に配置される。なおＰＶパワーコンディショナ４０も筐体１１０内に設置される設計であってもよい。 The housing 110 is a vertically long box, and the storage battery module 10 is disposed in the lower part of the housing 110. In the present embodiment, six storage battery modules 10 are arranged side by side vertically. Although not shown, the storage battery management device 30 is disposed on the storage battery module 10, and the storage battery power conditioner 20, the first breaker B1 to the third breaker B3 are disposed thereon. Thus, the bidirectional inverter 21 of the storage battery power conditioner 20 is arranged on the top surface side from the storage battery module 10. The PV power conditioner 40 may also be designed to be installed in the housing 110.
　図４（ａ）に示すように筐体１１０の天面１１０ｔには第１空気孔１１１が設けられる。第１空気孔１１１の近傍にインバータファン５０が設けられる。インバータファン５０は排気ファンであり、双方向インバータ２１の近辺の熱い空気を排出する。インバータファン５０は、筐体１１０の下部に設けられる第２空気孔１１３及び第３空気孔１１４から導入された空気を吸い上げることで双方向インバータ２１を冷却する。 As shown in FIG. 4A, a first air hole 111 is provided in the top surface 110t of the housing 110. An inverter fan 50 is provided in the vicinity of the first air hole 111. The inverter fan 50 is an exhaust fan and discharges hot air in the vicinity of the bidirectional inverter 21. The inverter fan 50 cools the bidirectional inverter 21 by sucking up air introduced from the second air hole 113 and the third air hole 114 provided in the lower part of the casing 110.
　筐体１１０内の下部に蓄電池ファン６０を設ける。蓄電池ファン６０は第２空気孔１１３及び第３空気孔１１４から外気を導入する。インバータファン５０と蓄電池ファン６０を併用することで、蓄電池モジュール１０の冷却効率を上げることができる。また下部から吸気し、上部から排気することで、蓄電池の放電による電池の温度上昇や、インバータの廃熱を上昇気流により上部に送る効果も期待できる。 A storage battery fan 60 is provided in the lower part of the housing 110. The storage battery fan 60 introduces outside air from the second air hole 113 and the third air hole 114. By using the inverter fan 50 and the storage battery fan 60 in combination, the cooling efficiency of the storage battery module 10 can be increased. In addition, by taking in air from the lower part and exhausting from the upper part, it is possible to expect the effect that the temperature of the battery rises due to the discharge of the storage battery and that the waste heat of the inverter is sent to the upper part by the updraft.
　図４（ｂ）に示すように筐体１１０の正面１１０ｆには、取っ手１１２、第２空気孔１１３及び第３空気孔１１４が設けられる。第２空気孔１１３及び第３空気孔１１４は正面１１０ｆの下部に、横並びに設けられる。図４（ｃ）に示すように筐体１１０の底面１１０ｂには、二つの入線孔１１５、１１６が設けられる。 As shown in FIG. 4B, a handle 112, a second air hole 113, and a third air hole 114 are provided on the front surface 110f of the housing 110. The second air hole 113 and the third air hole 114 are provided side by side below the front surface 110f. As shown in FIG. 4C, two entry holes 115 and 116 are provided on the bottom surface 110 b of the housing 110.
　図５は、筐体１１０を右側面１１０ｓから見た図である。図５は図４（ｄ）の領域Ａ近傍をより詳細に描いた図である。蓄電池ファン６０は筐体１１０内の底面近傍に、外気導入口が第２空気孔１１３及び第３空気孔１１４を向くように配置される。 FIG. 5 is a view of the housing 110 viewed from the right side surface 110s. FIG. 5 is a diagram depicting the vicinity of region A in FIG. 4D in more detail. The storage battery fan 60 is arranged in the vicinity of the bottom surface in the housing 110 so that the outside air inlet faces the second air hole 113 and the third air hole 114.
　ヒータ７０は、蓄電池ファン６０から送出された空気を受け、温風を送出する。本実施の形態ではヒータ７０はヒートシンクを備え、蓄電池ファン６０の吹出口とヒートシンクが対面するように蓄電池ファン６０とヒータ７０を構成する。蓄電池ファン６０及びヒータ７０は蓄電池モジュール１０より底面側に設けられる。蓄電池モジュール１０を加熱する際、蓄電池ファン６０及びヒータ７０は両方とも稼働し、第２空気孔１１３及び第３空気孔１１４から吸気した空気を温めて放出する。放出された温風は図４（ｄ）に示すように、筐体１１０内にて底面側から天面側に向けて上昇し、天面に設けられた第１空気孔１１１から排気される。 The heater 70 receives air sent from the storage battery fan 60 and sends warm air. In the present embodiment, the heater 70 includes a heat sink, and the storage battery fan 60 and the heater 70 are configured so that the air outlet of the storage battery fan 60 and the heat sink face each other. The storage battery fan 60 and the heater 70 are provided on the bottom side of the storage battery module 10. When the storage battery module 10 is heated, both the storage battery fan 60 and the heater 70 are operated to warm and release the air sucked from the second air hole 113 and the third air hole 114. As shown in FIG. 4D, the discharged warm air rises from the bottom surface side to the top surface side in the housing 110 and is exhausted from the first air hole 111 provided on the top surface.
　図６は、図１の蓄電システム１００の構成要素を説明するための機能ブロック図である。蓄電池モジュール１０は蓄電池セル１１、電圧センサ１２、電流センサ１３、温度センサ１４を備える。図６の蓄電池セル１１は複数の蓄電池セルの総称として描いている。 FIG. 6 is a functional block diagram for explaining the components of the power storage system 100 of FIG. The storage battery module 10 includes a storage battery cell 11, a voltage sensor 12, a current sensor 13, and a temperature sensor 14. The storage battery cell 11 of FIG. 6 is drawn as a general term for a plurality of storage battery cells.
　電圧センサ１２は各蓄電池セルの電圧を検出する。電流センサ１３は蓄電池セル１１に流れる電流を検出する。電流センサ１３にはホール素子やシャント抵抗を用いることができる。温度センサ１４は、蓄電池モジュール１０内の蓄電池セル１１の温度を検出する。温度センサ１４にはサーミスタを用いることができる。電圧センサ１２により検出された電圧値、電流センサ１３により検出された電流値、温度センサ１４により検出された温度値は、蓄電池モジュール１０の監視データとして通信路を介して蓄電池管理装置３０に出力される。 The voltage sensor 12 detects the voltage of each storage battery cell. The current sensor 13 detects the current flowing through the storage battery cell 11. A Hall element or a shunt resistor can be used for the current sensor 13. The temperature sensor 14 detects the temperature of the storage battery cell 11 in the storage battery module 10. A thermistor can be used for the temperature sensor 14. The voltage value detected by the voltage sensor 12, the current value detected by the current sensor 13, and the temperature value detected by the temperature sensor 14 are output as monitoring data of the storage battery module 10 to the storage battery management device 30 via the communication path. The
　蓄電池パワーコンディショナ２０は双方向インバータ２１、制御回路２２を備える。制御回路２２は蓄電システム１００のモード管理、双方向インバータ２１の制御、蓄電池管理装置３０との通信、第１スイッチＳ１～第６スイッチＳ６、第１ブレーカＢ１～第３ブレーカＢ３の制御などを実行する。また制御回路２２は、双方向インバータ２１を冷却するためにインバータファン５０を制御する。 The storage battery power conditioner 20 includes a bidirectional inverter 21 and a control circuit 22. The control circuit 22 executes mode management of the power storage system 100, control of the bidirectional inverter 21, communication with the storage battery management device 30, control of the first switch S1 to sixth switch S6, control of the first breaker B1 to third breaker B3, and the like. To do. The control circuit 22 controls the inverter fan 50 in order to cool the bidirectional inverter 21.
　ＰＶパワーコンディショナ４０はインバータ４１、制御回路４２を備える。制御回路４２は太陽光発電システム３００の状態管理、発電制御、蓄電池管理装置３０との通信などを実行する。表示装置７００は蓄電池管理装置３０による制御の下、各種設定画面、蓄電池モジュール１０および太陽光発電システム３００のステータス情報などを表示する。 The PV power conditioner 40 includes an inverter 41 and a control circuit 42. The control circuit 42 executes state management of the photovoltaic power generation system 300, power generation control, communication with the storage battery management device 30, and the like. The display device 700 displays various setting screens, status information of the storage battery module 10 and the photovoltaic power generation system 300 under the control of the storage battery management device 30.
　蓄電池管理装置３０は通信部３１、監視データ取得部３２、ユーザ入力受付部３３、ＳＯＣ（State Of Charge)算出部３４、充放電制御部３５、発電制御部３６、温度制御部３７、ファン・ヒータ制御部３８、スイッチ制御部３９を備える。これらの構成は、ハードウエア的には、任意のプロセッサ、メモリ、その他のＬＳＩで実現でき、ソフトウエア的にはメモリにロードされたプログラムなどによって実現されるが、ここではそれらの連携によって実現される機能ブロックを描いている。したがって、これらの機能ブロックがハードウエアのみ、ソフトウエアのみ、またはそれらの組合せによっていろいろな形で実現できることは、当業者には理解されるところである。 The storage battery management device 30 includes a communication unit 31, a monitoring data acquisition unit 32, a user input reception unit 33, an SOC (StategeOf Charge) calculation unit 34, a charge / discharge control unit 35, a power generation control unit 36, a temperature control unit 37, a fan / heater A control unit 38 and a switch control unit 39 are provided. These configurations can be realized by an arbitrary processor, memory, or other LSI in terms of hardware, and are realized by a program loaded in the memory in terms of software. Draw functional blocks. Accordingly, those skilled in the art will understand that these functional blocks can be realized in various forms by hardware only, software only, or a combination thereof.
　通信部３１は、蓄電池管理装置３０と蓄電池パワーコンディショナ２０間のパケット通信、蓄電池管理装置３０とＰＶパワーコンディショナ４０間のパケット通信を制御する。監視データ取得部３２は、蓄電池モジュール１０から送信される監視データを取得する。また監視データ取得部３２は、温度センサ６００から送信される、筐体１１０の外の気温を示す温度データを取得する。 The communication unit 31 controls packet communication between the storage battery management device 30 and the storage battery power conditioner 20, and packet communication between the storage battery management device 30 and the PV power conditioner 40. The monitoring data acquisition unit 32 acquires monitoring data transmitted from the storage battery module 10. In addition, the monitoring data acquisition unit 32 acquires temperature data indicating the temperature outside the housing 110 transmitted from the temperature sensor 600.
　ユーザ入力受付部３３は、ユーザにより操作部８００に入力された情報を受け付ける。例えば、系統電源２００から蓄電池モジュール１０への充電処理を開始する充電開始時刻、その充電レートなどの情報を受け付ける。 The user input reception unit 33 receives information input to the operation unit 800 by the user. For example, information such as a charging start time at which charging processing from the system power supply 200 to the storage battery module 10 is started and a charging rate thereof is received.
　ＳＯＣ算出部３４は、蓄電池モジュール１０から送信される監視データをもとに蓄電池セル１１のＳＯＣ（残容量）を算出する。ＳＯＣの算出方法としてＯＣＶ（Open Circuit Voltage）法やクーロンカウント法を用いることができる。 The SOC calculation unit 34 calculates the SOC (remaining capacity) of the storage battery cell 11 based on the monitoring data transmitted from the storage battery module 10. As an SOC calculation method, an OCV (Open Circuit Voltage) method or a Coulomb count method can be used.
　充放電制御部３５は、蓄電池モジュール１０に充電する場合の充電レートを示す充電設定値を含むパケット信号を、蓄電池パワーコンディショナ２０の制御回路２２に送信する。また充放電制御部３５は、蓄電池モジュール１０から放電する場合の放電レートを示す放電設定値を含むパケット信号を制御回路２２に送信する。また充放電制御部３５は、制御回路２２から、実際に充電された充電値または実際に放電された放電値を含むパケット信号を受信する。蓄電池モジュール１０の充電中または放電中、充放電制御部３５はパケット信号を制御回路２２に定期的（例えば、１秒周期）に送信する。制御回路２２は当該パケット信号を受信する度に、実データを含むパケット信号を返信する。 The charge / discharge control unit 35 transmits to the control circuit 22 of the storage battery power conditioner 20 a packet signal including a charge setting value indicating a charge rate when the storage battery module 10 is charged. In addition, the charge / discharge control unit 35 transmits a packet signal including a discharge set value indicating a discharge rate when discharging from the storage battery module 10 to the control circuit 22. Further, the charge / discharge control unit 35 receives a packet signal including a charge value that is actually charged or a discharge value that is actually discharged from the control circuit 22. While the storage battery module 10 is being charged or discharged, the charge / discharge control unit 35 periodically transmits a packet signal to the control circuit 22 (for example, every 1 second). Each time the control circuit 22 receives the packet signal, it returns a packet signal containing actual data.
　発電制御部３６は、ＰＶパワーコンディショナ４０の制御回路４２から、太陽光発電システム３００の発電情報を含むパケット信号を受信する。発電制御部３６は、発電を制御するための情報を含むパケット信号を制御回路４２に送信する。発電制御部３６はパケット信号を制御回路４２に定期的（例えば、１秒周期）に送信する。制御回路４２は当該パケット信号を受信する度に、実データを含むパケット信号を返信する。発電制御部３６は、制御回路４２からの応答がない場合、パケット信号の送信周期を長くする。例えば、１分周期に変更する。 The power generation control unit 36 receives a packet signal including power generation information of the solar power generation system 300 from the control circuit 42 of the PV power conditioner 40. The power generation control unit 36 transmits a packet signal including information for controlling power generation to the control circuit 42. The power generation control unit 36 transmits the packet signal to the control circuit 42 periodically (for example, every 1 second). Each time the control circuit 42 receives the packet signal, it returns a packet signal containing actual data. When there is no response from the control circuit 42, the power generation control unit 36 lengthens the transmission cycle of the packet signal. For example, the period is changed to one minute.
　温度制御部３７は、蓄電池セル１１の温度を管理するとともにファン・ヒータ制御部３８を制御して、蓄電池セル１１の温度を調整する。蓄電池セル１１を冷却する場合、ファン・ヒータ制御部３８は、蓄電池ファン６０及びインバータファン５０の少なくとも一方を稼働させる。基本的に蓄電池ファン６０を稼働させて、第２空気孔１１３及び第３空気孔１１４から吸気した外気を蓄電池セル１１に送風して蓄電池セル１１を冷却する。その際、インバータファン５０を稼働させると外気の導入を促進できる。なおインバータファン５０が吸気ファンの場合、インバータファン５０を稼働させて蓄電池セル１１の上側からも外気を導入できる。 The temperature control unit 37 controls the temperature of the storage battery cell 11 and controls the fan / heater control unit 38 to adjust the temperature of the storage battery cell 11. When cooling the storage battery cell 11, the fan / heater control unit 38 operates at least one of the storage battery fan 60 and the inverter fan 50. Basically, the storage battery fan 60 is operated, and the outside air sucked from the second air hole 113 and the third air hole 114 is blown to the storage battery cell 11 to cool the storage battery cell 11. At that time, when the inverter fan 50 is operated, introduction of outside air can be promoted. When the inverter fan 50 is an intake fan, the inverter fan 50 can be operated to introduce outside air from the upper side of the storage battery cell 11.
　蓄電池セル１１を加熱する場合、ファン・ヒータ制御部３８は、蓄電池ファン６０及びヒータ７０を稼働させ、インバータファン５０を非稼働に制御する。図４（ｄ）に示すように温風が蓄電池モジュール１０の下部から上部に吹き上がることにより、蓄電池セル１１の温度を上昇させることができる。この際、インバータファン５０を停止させることにより、第２空気孔１１３及び第３空気孔１１４からの外気の導入を抑え、ヒータ７０で暖められた空気を筐体１１０の内部で循環させることができる。これにより、ヒータ７０の加温効率が向上する。なお、インバータファン５０が吸気ファンの場合、インバータファン５０を停止させることにより、蓄電池モジュール１０の上部側から外気が吹きつけられることを防止できる。蓄電池セル１１を加熱する必要がある状況は通常、外気温が低い状態であり、インバータファン５０を稼働させていると、蓄電池モジュール１０に上から冷気が吹きつけられることになる。 When the storage battery cell 11 is heated, the fan / heater control unit 38 operates the storage battery fan 60 and the heater 70 and controls the inverter fan 50 to be inactive. As shown in FIG. 4D, the hot air blows up from the lower part of the storage battery module 10 to the upper part, whereby the temperature of the storage battery cell 11 can be increased. At this time, by stopping the inverter fan 50, introduction of outside air from the second air hole 113 and the third air hole 114 can be suppressed, and the air heated by the heater 70 can be circulated inside the housing 110. . Thereby, the heating efficiency of the heater 70 is improved. In addition, when the inverter fan 50 is an intake fan, it can prevent that external air is blown from the upper part side of the storage battery module 10 by stopping the inverter fan 50. FIG. The situation in which the storage battery cell 11 needs to be heated is usually a state in which the outside air temperature is low. When the inverter fan 50 is operated, cold air is blown onto the storage battery module 10 from above.
　スイッチ制御部３９は、蓄電池パワーコンディショナ２０の制御回路２２に制御情報を含むパケット信号を送信し、当該制御回路２２を介して、第１スイッチＳ１～第６スイッチＳ６、第１ブレーカＢ１～第３ブレーカＢ３の制御を行うことができる。スイッチ制御部３９は、第８スイッチＳ８をオフに制御してヒータ７０への給電を停止できる。また第９スイッチＳ９をオフに制御して蓄電池ファン６０への給電を停止できる。また第７スイッチＳ７をオフに制御してインバータファン５０への給電を停止できる。なお第７スイッチＳ７、第８スイッチＳ８、第９スイッチＳ９は、蓄電池パワーコンディショナ２０の制御回路２２からも制御できる。 The switch control unit 39 transmits a packet signal including control information to the control circuit 22 of the storage battery power conditioner 20, and through the control circuit 22, the first switch S1 to the sixth switch S6 and the first breaker B1 to the first breaker B1. The control of the 3 breaker B3 can be performed. The switch control unit 39 can stop the power supply to the heater 70 by controlling the eighth switch S8 to be off. In addition, the power supply to the storage battery fan 60 can be stopped by controlling the ninth switch S9 to be off. Further, the power supply to the inverter fan 50 can be stopped by controlling the seventh switch S7 to be turned off. The seventh switch S7, the eighth switch S8, and the ninth switch S9 can also be controlled from the control circuit 22 of the storage battery power conditioner 20.
　スイッチ制御部３９は、第６スイッチＳ６をオフに制御して特定負荷５００への給電を停止できる。スイッチ制御部３９は系統電源２００の停電時にて、特定負荷５００の消費電力が太陽光発電システム３００の発電電力を上回るとき第６スイッチＳ６をオフする。この条件で第６スイッチＳ６をオフする場合、停電時における特定負荷５００への給電機会が減る傾向がある。特に夜間に停電した場合、特定負荷５００に給電できなくなる。そこで、特定負荷５００の消費電力が一定電力を超えた場合に、上述の条件にもとづく第６スイッチＳ６の制御を実行してもよい。即ち、特定負荷５００の消費電力が一定電力以下の場合は、特定負荷５００への給電を停止しない。当該一定電力を例えば１ｋＷとすると、太陽光発電システム３００の発電に関係なく、１ｋＷを超えない範囲で特定負荷５００を使用できる。従って、停電時における特定負荷５００への給電機会を増やすことができる。ここで、一定電力の値は、停電時の使用が想定される照明や空調機器の消費電力を考慮して決定することが望ましい。 The switch control unit 39 can stop the power supply to the specific load 500 by controlling the sixth switch S6 to be off. The switch control unit 39 turns off the sixth switch S6 when the power consumption of the specific load 500 exceeds the generated power of the solar power generation system 300 at the time of a power failure of the system power supply 200. When the sixth switch S6 is turned off under this condition, there is a tendency that the power supply opportunity to the specific load 500 at the time of a power failure decreases. In particular, when a power failure occurs at night, the specific load 500 cannot be supplied with power. Therefore, when the power consumption of the specific load 500 exceeds a certain power, the sixth switch S6 may be controlled based on the above-described conditions. That is, when the power consumption of the specific load 500 is less than or equal to a certain power, the power supply to the specific load 500 is not stopped. If the constant power is 1 kW, for example, the specific load 500 can be used within a range not exceeding 1 kW regardless of the power generation of the solar power generation system 300. Therefore, the power supply opportunity to the specific load 500 at the time of a power failure can be increased. Here, it is desirable to determine the value of the constant power in consideration of the power consumption of lighting and air conditioning equipment that is assumed to be used during a power failure.
　またスイッチ制御部３９は系統電源２００の停電時にて、特定負荷５００の消費電力が、太陽光発電システム３００の発電電力に調整電力（正の値）を加えた調整後の発電電力を上回るとき第６スイッチＳ６をオフしてもよい。この場合も、停電時における特定負荷５００への給電機会を増やすことができる。ここで、調整電力の値は、特定負荷５００への給電機会の確保と、蓄電池保護のバランスを考慮して決定することが望ましい。 In addition, the switch control unit 39 is the first when the power consumption of the specific load 500 exceeds the adjusted generated power obtained by adding the adjusted power (positive value) to the generated power of the photovoltaic power generation system 300 during the power failure of the system power supply 200. The 6 switch S6 may be turned off. Also in this case, the power supply opportunity to the specific load 500 at the time of a power failure can be increased. Here, it is desirable to determine the value of the adjusted power in consideration of securing a power supply opportunity to the specific load 500 and protecting the storage battery.
　またスイッチ制御部３９は系統電源２００の停電時にて、蓄電池モジュール１０のＳＯＣが過放電防止用設定値（例えば１０％）を下回ると第６スイッチＳ６をオフする。過放電防止用設定値は特定負荷５００の容量に応じて設定される。特定負荷５００の容量が小さいほど、過放電防止用設定値に小さな値が設定される。スイッチ制御部３９は、当該二つの条件の両方を満たしたとき第６スイッチＳ６をオフしてもよいし、一方を満たしただけで第６スイッチＳ６をオフしてもよい。 Further, the switch control unit 39 turns off the sixth switch S6 when the SOC of the storage battery module 10 falls below a set value for preventing overdischarge (for example, 10%) during a power failure of the system power supply 200. The overdischarge prevention set value is set according to the capacity of the specific load 500. As the capacity of the specific load 500 is smaller, a smaller value is set as the overdischarge prevention set value. The switch control unit 39 may turn off the sixth switch S6 when both of the two conditions are satisfied, or may turn off the sixth switch S6 only when one of the two conditions is satisfied.
　系統電源２００の停電時は蓄電システム１００は自立運転モードで動作する。従って特定負荷５００の消費電力が太陽光発電システム３００の発電電力を上回ると、蓄電池モジュール１０の容量が低下していく。蓄電池モジュール１０は過放電すると劣化する。 The power storage system 100 operates in the self-sustaining operation mode at the time of power failure of the system power supply 200. Therefore, when the power consumption of the specific load 500 exceeds the power generation power of the solar power generation system 300, the capacity of the storage battery module 10 decreases. The storage battery module 10 deteriorates when overdischarged.
　蓄電池モジュール１０の保護を重視する場合、ＳＯＣの値に係わらず特定負荷５００の消費電力が太陽光発電システム３００の発電電力を上回った時点で、特定負荷５００への給電を停止する。また特定負荷５００への給電維持を重視する場合、蓄電池モジュール１０のＳＯＣが過放電防止用設定値を下回り、かつ特定負荷５００の消費電力が太陽光発電システム３００の発電電力を上回っている場合に特定負荷５００への給電を停止する。太陽光発電システム３００の発電電力が特定負荷５００の消費電力を上回っている場合、蓄電池モジュール１０のＳＯＣが回復する方向にあるため第６スイッチＳ６をオフしない。 When importance is attached to the protection of the storage battery module 10, power supply to the specific load 500 is stopped when the power consumption of the specific load 500 exceeds the generated power of the solar power generation system 300 regardless of the SOC value. In addition, when emphasizing the maintenance of power supply to the specific load 500, when the SOC of the storage battery module 10 is below the set value for preventing overdischarge and the power consumption of the specific load 500 exceeds the power generation of the solar power generation system 300 Power supply to the specific load 500 is stopped. When the generated power of the solar power generation system 300 exceeds the power consumption of the specific load 500, the sixth switch S6 is not turned off because the SOC of the storage battery module 10 is in a recovery direction.
　特定負荷５００の消費電力が太陽光発電システム３００の発電電力を上回るか否かは、蓄電システム１００が放電しているか否かを検出することにより判定できる。自立運転モードでは、特定負荷５００の消費電力が太陽光発電システム３００の発電電力を上回る場合、蓄電池モジュール１０は放電状態となる。逆に特定負荷５００の消費電力が太陽光発電システム３００の発電電力を下回る場合、蓄電池モジュール１０は充電状態となる。スイッチ制御部３９は、蓄電池パワーコンディショナ２０の制御回路２２から受信するパケット信号に含まれる情報を参照して、蓄電池モジュール１０が放電中か充電中かを特定できる。 Whether or not the power consumption of the specific load 500 exceeds the power generation of the solar power generation system 300 can be determined by detecting whether or not the power storage system 100 is discharged. In the self-sustaining operation mode, when the power consumption of the specific load 500 exceeds the power generation power of the solar power generation system 300, the storage battery module 10 is in a discharged state. Conversely, when the power consumption of the specific load 500 is lower than the power generation of the solar power generation system 300, the storage battery module 10 is in a charged state. The switch control unit 39 can specify whether the storage battery module 10 is discharging or charging with reference to information included in the packet signal received from the control circuit 22 of the storage battery power conditioner 20.
　また交流電流路に電流センサを設置して、その電流の向きから特定負荷５００の消費電力が太陽光発電システム３００の発電電力を上回るか否かを判定してもよい。また交流電流路と特定負荷５００との間の電流路に電流センサを設置して、その計測値をもとに判定してもよい。 Alternatively, a current sensor may be installed in the AC current path, and it may be determined whether or not the power consumption of the specific load 500 exceeds the generated power of the photovoltaic power generation system 300 from the direction of the current. Further, a current sensor may be installed in the current path between the AC current path and the specific load 500, and the determination may be made based on the measured value.
　図７は、本発明の実施の形態に係る蓄電システム１００による、自立運転モードにおける第６スイッチＳ６の制御例を説明するためのフローチャートである。監視データ取得部３２は、蓄電池モジュール１０から蓄電池セルの電圧値などの監視データを取得する（Ｓ１０）。ＳＯＣ算出部３４は、監視データをもとに蓄電池モジュール１０のＳＯＣを算出する（Ｓ１１）。スイッチ制御部３９は、算出されたＳＯＣと過放電防止用の第１設定値を比較する（Ｓ１２）。ＳＯＣが第１設定値以上の場合（Ｓ１２のＮ）、ステップＳ１０に遷移する。ＳＯＣが第１設定値未満の場合（Ｓ１２のＹ）、スイッチ制御部３９は蓄電池モジュール１０が放電状態であるか否か判定する（Ｓ１３）。放電状態でない場合（Ｓ１３のＮ）、ステップＳ１０に遷移する。放電状態である場合（Ｓ１３のＹ）、スイッチ制御部３９は第６スイッチＳ６をオフする（Ｓ１４）。 FIG. 7 is a flowchart for explaining a control example of the sixth switch S6 in the self-sustaining operation mode by the power storage system 100 according to the embodiment of the present invention. The monitoring data acquisition part 32 acquires monitoring data, such as a voltage value of a storage battery cell, from the storage battery module 10 (S10). The SOC calculation unit 34 calculates the SOC of the storage battery module 10 based on the monitoring data (S11). The switch control unit 39 compares the calculated SOC with the first set value for preventing overdischarge (S12). When the SOC is equal to or higher than the first set value (N in S12), the process proceeds to step S10. When the SOC is less than the first set value (Y in S12), the switch control unit 39 determines whether or not the storage battery module 10 is in a discharged state (S13). When not in the discharging state (N in S13), the process proceeds to step S10. When it is in a discharging state (Y in S13), the switch control unit 39 turns off the sixth switch S6 (S14).
　監視データ取得部３２は、蓄電池モジュール１０から蓄電池セルの電圧値などの監視データを取得する（Ｓ１５）。ＳＯＣ算出部３４は、監視データをもとに蓄電池モジュール１０のＳＯＣを算出する（Ｓ１６）。スイッチ制御部３９は、算出されたＳＯＣと復帰用の第２設定値を比較する（Ｓ１７）。第２設定値は第１設定値より大きな値に設定される。例えば、第１設定値＋１０％に設定される。 The monitoring data acquisition part 32 acquires monitoring data, such as a voltage value of a storage battery cell, from the storage battery module 10 (S15). The SOC calculation unit 34 calculates the SOC of the storage battery module 10 based on the monitoring data (S16). The switch control unit 39 compares the calculated SOC with the second set value for return (S17). The second set value is set to a value larger than the first set value. For example, the first set value + 10% is set.
ＳＯＣが第２設定値以上の場合（Ｓ１７のＮ）、ステップＳ１５に遷移する。ＳＯＣが第２設定値未満の場合（Ｓ１７のＹ）、スイッチ制御部３９は第６スイッチＳ６をオンする（Ｓ１８）。なお蓄電池モジュール１０が放電状態にあることを追加条件としてもよい。また表示装置７００に復帰が可能であることを表示し、ユーザが操作部８００に復帰指示を入力することを追加条件としてもよい。この場合、スイッチ制御部３９は、第６スイッチＳ６がオフした後にて蓄電池モジュール１０のＳＯＣが第２設定値以上になったとき、表示装置７００に復帰可能状態であることを表示させる。特定負荷５００に電気ストーブなどの放熱機器が含まれる場合、第６スイッチＳ６のオフにより放熱機器が停止するが、ユーザが放熱機器の停止後に可燃物を放熱機器の近くに置いてしまう可能性がある。ユーザ操作を条件とすることにより、ユーザに給電再開を認識させることができる。 When the SOC is equal to or greater than the second set value (N in S17), the process proceeds to step S15. When the SOC is less than the second set value (Y in S17), the switch control unit 39 turns on the sixth switch S6 (S18). The additional condition may be that the storage battery module 10 is in a discharged state. An additional condition may be that the display device 700 displays that the return is possible and the user inputs a return instruction to the operation unit 800. In this case, when the SOC of the storage battery module 10 becomes equal to or higher than the second set value after the sixth switch S6 is turned off, the switch control unit 39 causes the display device 700 to display that it can be returned. When the specific load 500 includes a heat dissipating device such as an electric heater, the heat dissipating device is stopped by turning off the sixth switch S6. However, there is a possibility that the user may place a combustible material near the heat dissipating device after the heat dissipating device is stopped. is there. By making the user operation a condition, the user can be made aware of the resumption of power supply.
　特定負荷５００とすべき負荷はユーザによって選択される。従って、例えばＬＥＤ照明など自動復帰しても不安全状態にならない特定負荷５００のみの場合には、ユーザ操作を条件とする必要はない。ユーザは、運転開始前に表示装置７００に表示された設定画面から、予め自動復帰させるか否かを設定できる。この設定が有効になっている場合、ＳＯＣが第２設定値以上になると、スイッチ制御部３９は第６スイッチＳ６をオンして、自動で給電を再開させる。なお、運転中に自動・手動復帰設定を変更しても、一度システムの運転を停止して、再起動しない限り反映されない。 The load to be the specific load 500 is selected by the user. Therefore, for example, in the case of only the specific load 500 that does not become an unsafe state even if the LED light is automatically restored, it is not necessary to make a user operation a condition. The user can set in advance whether or not to automatically return from the setting screen displayed on the display device 700 before the start of operation. When this setting is valid, when the SOC becomes equal to or higher than the second set value, the switch control unit 39 turns on the sixth switch S6 and automatically restarts power supply. Note that even if the automatic / manual return setting is changed during operation, it will not be reflected unless the system operation is stopped and restarted.
　蓄電システム１００の自立運転が終了するまで（Ｓ１９のＹ）、ステップＳ１０～ステップＳ１８までの処理が実行される（Ｓ１９のＮ）。なお図７では便宜的に一番下に描いているが、運転終了の判定処理は、どの時点でも実行される。 The processing from step S10 to step S18 is executed until the self-sustained operation of the power storage system 100 ends (Y in S19) (N in S19). Although shown at the bottom in FIG. 7 for the sake of convenience, the operation end determination process is executed at any time.
　図８は、本発明の実施の形態に係る蓄電システム１００による、自立運転モードにおける第６スイッチＳ６以外の構成要素の制御例を説明するためのフローチャートである。監視データ取得部３２は、蓄電池モジュール１０から蓄電池セルの電圧値などの監視データを取得する（Ｓ２０）。ＳＯＣ算出部３４は、監視データをもとに蓄電池モジュール１０のＳＯＣを算出する（Ｓ２１）。発電制御部３６は、ＰＶパワーコンディショナ４０の制御回路４２から太陽光発電システム３００の発電情報を取得する（Ｓ２２）。 FIG. 8 is a flowchart for explaining a control example of components other than the sixth switch S6 in the self-sustaining operation mode by the power storage system 100 according to the embodiment of the present invention. The monitoring data acquisition part 32 acquires monitoring data, such as a voltage value of a storage battery cell, from the storage battery module 10 (S20). The SOC calculation unit 34 calculates the SOC of the storage battery module 10 based on the monitoring data (S21). The power generation control unit 36 acquires the power generation information of the solar power generation system 300 from the control circuit 42 of the PV power conditioner 40 (S22).
　スイッチ制御部３９は、算出されたＳＯＣと過放電防止用の第１設定値を比較する（Ｓ２３）。ＳＯＣが第１設定値以上の場合（Ｓ２３のＮ）、ステップＳ２０に遷移する。ＳＯＣが第１設定値未満の場合（Ｓ２３のＹ）、発電制御部３６は太陽光発電システム３００が発電中であるか否か判定する（Ｓ２４）。発電状態の場合（Ｓ２４のＮ）、ステップＳ２０に遷移する。非発電状態の場合（Ｓ２４のＹ）、ファン・ヒータ制御部３８はヒータ７０を非稼働に制御する（Ｓ２５）。ヒータ７０が稼働している場合は停止させ、稼働していない場合はその状態を維持する。なおファン・ヒータ制御部３８は蓄電池ファン６０及びインバータファン５０も非稼働に制御してもよい。 The switch control unit 39 compares the calculated SOC with the first set value for preventing overdischarge (S23). When the SOC is greater than or equal to the first set value (N in S23), the process proceeds to step S20. When the SOC is less than the first set value (Y in S23), the power generation control unit 36 determines whether or not the solar power generation system 300 is generating power (S24). In the power generation state (N in S24), the process proceeds to step S20. In the non-power generation state (Y in S24), the fan / heater control unit 38 controls the heater 70 to be inactive (S25). When the heater 70 is operating, it is stopped, and when it is not operating, the state is maintained. The fan / heater control unit 38 may also control the storage battery fan 60 and the inverter fan 50 to be inactive.
　ＳＯＣが第１設定値未満では蓄電池モジュール１０から放電されず、太陽光発電システム３００が発電していない状態では蓄電池モジュール１０に充電されない。従って蓄電池モジュール１０を加熱する必要がない。ヒータ７０を非稼働に制御することによりヒータ７０の消費電力を低減できる。なお停電時における自立運転モードでは、蓄電池モジュール１０及び太陽光発電システム３００からの給電が停止した時点で、ヒータ７０は稼働できなくなる。ステップＳ２５の処理は、蓄電池モジュール１０及び太陽光発電システム３００以外から電源を確保できる状況を主に想定している。 If the SOC is less than the first set value, the battery module 10 is not discharged, and the battery module 10 is not charged when the photovoltaic power generation system 300 is not generating power. Therefore, there is no need to heat the storage battery module 10. By controlling the heater 70 to be inactive, the power consumption of the heater 70 can be reduced. In the self-sustained operation mode at the time of a power failure, the heater 70 cannot be operated when the power supply from the storage battery module 10 and the photovoltaic power generation system 300 is stopped. The process of step S25 mainly assumes a situation where power can be secured from other than the storage battery module 10 and the solar power generation system 300.
　発電制御部３６は、ＰＶパワーコンディショナ４０に送信するパケット信号にスリープモードへの移行指示を含めることにより、ＰＶパワーコンディショナ４０をスリープモードに移行させる（Ｓ２６）。これによりＰＶパワーコンディショナ４０の消費電力を低減できる。なお太陽光発電システム３００の発電が停止した後、ＰＶパワーコンディショナ４０の制御回路４２が、自己判断によりＰＶパワーコンディショナ４０をスリープモードに移行させてもよい。 The power generation control unit 36 causes the PV power conditioner 40 to shift to the sleep mode by including an instruction to shift to the sleep mode in the packet signal transmitted to the PV power conditioner 40 (S26). Thereby, the power consumption of the PV power conditioner 40 can be reduced. In addition, after the electric power generation of the solar power generation system 300 stops, the control circuit 42 of the PV power conditioner 40 may shift the PV power conditioner 40 to the sleep mode by self-determination.
　充放電制御部３５は、蓄電池パワーコンディショナ２０に送信するパケット信号にスリープモードへの移行指示を含めることにより、蓄電池パワーコンディショナ２０をスリープモードに移行させる（Ｓ２７）。蓄電池モジュール１０からの放電が禁止され、系統電源２００からも太陽光発電システム３００からも充電されないため、蓄電池パワーコンディショナ２０をスリープさせる。これにより蓄電池パワーコンディショナ２０の消費電力を低減できる。 The charging / discharging control unit 35 causes the storage battery power conditioner 20 to shift to the sleep mode by including an instruction to shift to the sleep mode in the packet signal transmitted to the storage battery power conditioner 20 (S27). Since the discharge from the storage battery module 10 is prohibited and neither the grid power supply 200 nor the solar power generation system 300 is charged, the storage battery power conditioner 20 is caused to sleep. Thereby, the power consumption of the storage battery power conditioner 20 can be reduced.
　太陽光発電システム３００の発電が再開すると（Ｓ２８のＹ）、ＰＶパワーコンディショナ４０の制御回路４２は、ＰＶパワーコンディショナ４０をスリープモードから通常モードに復帰させる（Ｓ２９）。充放電制御部３５は、ＰＶパワーコンディショナ４０から受信するパケット信号を参照して太陽光発電システム３００の発電再開を検出すると、蓄電池パワーコンディショナ２０をスリープモードから通常モードに復帰させる（Ｓ３０）。 When the photovoltaic power generation system 300 resumes power generation (Y in S28), the control circuit 42 of the PV power conditioner 40 returns the PV power conditioner 40 from the sleep mode to the normal mode (S29). When the charge / discharge control unit 35 detects the resumption of power generation of the photovoltaic power generation system 300 with reference to the packet signal received from the PV power conditioner 40, the charge / discharge control unit 35 returns the storage battery power conditioner 20 from the sleep mode to the normal mode (S30). .
　蓄電システム１００の自立運転が終了するまで（Ｓ３１のＹ）、ステップＳ２０～ステップＳ３０までの処理が実行される（Ｓ３１のＮ）。なお図８では便宜的に一番下に描いているが、運転終了の判定処理は、どの時点でも実行される。 The process from step S20 to step S30 is executed until the self-sustained operation of the power storage system 100 ends (Y in S31) (N in S31). In FIG. 8, for the sake of convenience, it is drawn at the bottom, but the determination process for the end of operation is executed at any time.
　図９は、本発明の実施の形態に係る蓄電システム１００における、蓄電池管理装置３０とＰＶパワーコンディショナ４０間の通信間隔切替処理を説明するためのフローチャートである。ＰＶパワーコンディショナ４０がスリープモードの場合（Ｓ３５のＹ）、蓄電池管理装置３０の通信部３１は、蓄電池管理装置３０とＰＶパワーコンディショナ４０間の通信頻度を低下させる（Ｓ３６）。即ち通信間隔を長くする。夜間は通常、ＰＶパワーコンディショナ４０がスリープモードになるため通信間隔が長くなる。ＰＶパワーコンディショナ４０が通常モードの場合（Ｓ３５のＮ）、蓄電池管理装置３０の通信部３１は、蓄電池管理装置３０とＰＶパワーコンディショナ４０間の通信頻度を通常に設定する（Ｓ３７）。蓄電システム１００の運転が終了するまで（Ｓ３８のＹ）、ステップＳ３５～ステップＳ３７までの処理が繰り返し実行される（Ｓ３８のＮ）。 FIG. 9 is a flowchart for explaining a communication interval switching process between the storage battery management device 30 and the PV power conditioner 40 in the power storage system 100 according to the embodiment of the present invention. When the PV power conditioner 40 is in the sleep mode (Y in S35), the communication unit 31 of the storage battery management device 30 decreases the communication frequency between the storage battery management device 30 and the PV power conditioner 40 (S36). That is, the communication interval is lengthened. At night, the PV power conditioner 40 is normally in the sleep mode, so the communication interval becomes longer. When the PV power conditioner 40 is in the normal mode (N in S35), the communication unit 31 of the storage battery management device 30 sets the communication frequency between the storage battery management device 30 and the PV power conditioner 40 to normal (S37). Until the operation of the power storage system 100 ends (Y in S38), the processing from step S35 to step S37 is repeatedly executed (N in S38).
　以上説明したように本実施の形態によれば、系統電源に接続された蓄電システム１００に太陽光発電システム３００を連携させる際、太陽光発電システム３００をＰＶパワーコンディショナ４０を介して蓄電システム１００に接続する。即ち、交流出力で蓄電池モジュール１０及び系統電源２００と接続する。 As described above, according to the present embodiment, when the solar power generation system 300 is linked to the power storage system 100 connected to the system power supply, the solar power generation system 300 is connected to the power storage system 100 via the PV power conditioner 40. Connect to. That is, it connects with the storage battery module 10 and the system power supply 200 with an alternating current output.
　太陽光発電システム３００を、蓄電池パワーコンディショナ２０の直流側に接続することも考えられるが、この場合、太陽光発電システム３００の出力範囲が、蓄電池パワーコンディショナ２０の定格範囲内に収まる必要がある。既成の蓄電システム１００に太陽光発電システム３００を追加する場合、蓄電池パワーコンディショナ２０の定格範囲に収まる太陽光発電システム３００を選択する必要がある。また既存の太陽光発電システム３００に、既成の蓄電システム１００を連携しようとしても不可能となる場合がある。 It is conceivable to connect the photovoltaic power generation system 300 to the direct current side of the storage battery power conditioner 20, but in this case, the output range of the photovoltaic power generation system 300 needs to be within the rated range of the storage battery power conditioner 20. is there. When the photovoltaic power generation system 300 is added to the existing power storage system 100, it is necessary to select the photovoltaic power generation system 300 that falls within the rated range of the storage battery power conditioner 20. Further, it may be impossible to link the existing power storage system 100 to the existing solar power generation system 300.
　太陽光発電システム３００を、蓄電池パワーコンディショナ２０の直流側に接続する場合、太陽光発電システム３００と蓄電池パワーコンディショナ２０の間にＤＣ－ＤＣコンバータを設置することも考えられる。この場合、ＤＣ－ＤＣコンバータを設置するコストが増大するとともに、蓄電池パワーコンディショナ２０だけでなくＤＣ－ＤＣコンバータでも変換損失が発生するため、エネルギー効率が低下する。 When the solar power generation system 300 is connected to the direct current side of the storage battery power conditioner 20, it is conceivable to install a DC-DC converter between the solar power generation system 300 and the storage battery power conditioner 20. In this case, the cost for installing the DC-DC converter increases, and conversion loss occurs not only in the storage battery power conditioner 20 but also in the DC-DC converter, so that the energy efficiency is lowered.
　これに対して本実施の形態によれば、ＰＶパワーコンディショナ４０を設けることにより、様々な種類の太陽光発電システム３００を、出力範囲の制限なく蓄電システム１００に接続できる。またＤＣ－ＤＣコンバータが不要であるため、それによるエネルギー効率の低下も回避できる。 On the other hand, according to the present embodiment, by providing the PV power conditioner 40, various types of photovoltaic power generation systems 300 can be connected to the power storage system 100 without limitation of the output range. In addition, since a DC-DC converter is unnecessary, it is possible to avoid a reduction in energy efficiency.
　また自立運転モードにて特定負荷５００の消費電力が太陽光発電システム３００の発電電力を上回るとき、及び／又は蓄電池モジュール１０のＳＯＣが第１設定値を下回るとき特定負荷５００への給電を停止する。これにより蓄電池モジュール１０の過放電を防止し、蓄電池モジュール１０を保護できる。 In addition, when the power consumption of the specific load 500 exceeds the generated power of the photovoltaic power generation system 300 and / or when the SOC of the storage battery module 10 falls below the first set value in the self-sustained operation mode, power supply to the specific load 500 is stopped. . Thereby, the overdischarge of the storage battery module 10 can be prevented, and the storage battery module 10 can be protected.
　以上、本発明を実施の形態をもとに説明した。この実施の形態は例示であり、それらの各構成要素や各処理プロセスの組み合わせにいろいろな変形例が可能なこと、またそうした変形例も本発明の範囲にあることは当業者に理解されるところである。 The present invention has been described based on the embodiments. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications can be made to combinations of the respective constituent elements and processing processes, and such modifications are within the scope of the present invention. is there.
［第１の変形例］
　図１０、本発明の第１の変形例に係る蓄電システム１００を説明するための図である。第１の変形例に係る蓄電システム１００は、図１－３に示した蓄電システム１００の第５スイッチＳ５及び第６スイッチＳ６を省略した構成である。 [First Modification]
FIG. 10 is a diagram for explaining a power storage system 100 according to a first modification of the present invention. The power storage system 100 according to the first modification has a configuration in which the fifth switch S5 and the sixth switch S6 of the power storage system 100 illustrated in FIG. 1-3 are omitted.
　図１－３に示した蓄電システム１００では特定負荷５００への給電を遮断するための素子として、第３ブレーカＢ３と直列に接続された第６スイッチＳ６を使用した。この構成では上述のように第６スイッチＳ６をオフ（リレーの場合はオープン）した後、蓄電池モジュール１０のＳＯＣが復帰用の第２設定値を上回るとオン（リレーの場合はクローズ）して、自動復帰させることができる。 In the power storage system 100 shown in FIG. 1-3, the sixth switch S6 connected in series with the third breaker B3 is used as an element for cutting off the power supply to the specific load 500. In this configuration, after the sixth switch S6 is turned off (open in the case of a relay) as described above, it is turned on (closed in the case of a relay) when the SOC of the storage battery module 10 exceeds the second set value for return, It can be automatically restored.
　第１の変形例ではスイッチ制御部３９は、特定負荷５００への給電を停止する際、第３ブレーカＢ３をクローズさせる。第３ブレーカＢ３はコイル及び接点を有し、コイルは過電流検出をトリガとして励磁し接点をクローズさせる。また第３ブレーカＢ３は外部制御により通電される別のコイルを有する。スイッチ制御部３９はその別のコイルに電流を流すよう制御することにより、接点をクローズできる。 In the first modification, the switch control unit 39 closes the third breaker B3 when stopping the power supply to the specific load 500. The third breaker B3 has a coil and a contact, and the coil is excited with overcurrent detection as a trigger to close the contact. The third breaker B3 has another coil that is energized by external control. The switch control unit 39 can close the contact by controlling the current to flow through the other coil.
　このように第１の変形例によれば第５スイッチＳ５及び第６スイッチＳ６を省略するため蓄電システム１００全体のコストを低減できる。またブレーカは一度開くと手動で復帰させる必要がある。即ち、ブレーカがトリップするとブレーカの再投入が必要となる。スイッチ制御部３９は、ブレーカを開いた後にて蓄電池モジュール１０のＳＯＣが、復帰用の設定値を上回ったとき、表示装置７００にブレーカ復帰可能状態であることを表示させる。このように第６スイッチＳ６にブレーカを使用する場合、復帰の際に必ずユーザの確認作業が必要となり、復帰の際の安全性をより担保できる。なお、第６スイッチＳ６はリセットスイッチでもよく、その場合、リセットスイッチを押すことで第６スイッチＳ６がオンされる。 Thus, according to the first modification, since the fifth switch S5 and the sixth switch S6 are omitted, the cost of the entire power storage system 100 can be reduced. The breaker must be manually reset once it is opened. That is, when the breaker trips, the breaker needs to be restarted. When the SOC of the storage battery module 10 exceeds the set value for return after opening the breaker, the switch control unit 39 displays on the display device 700 that the breaker can be returned. As described above, when the breaker is used for the sixth switch S6, the user's confirmation work is always required at the time of return, and the safety at the time of return can be further secured. The sixth switch S6 may be a reset switch. In this case, the sixth switch S6 is turned on by pressing the reset switch.
［第２の変形例］
　上述したように、蓄電システム１００における蓄電池モジュール１０に蓄えられた電力は、昼間に使用することによって電力の使用量を平準化するいわゆるピークカットに使用されたり、系統電源２００が停電したときのバックアップ電源として使用されたりする。このように、蓄電池モジュール１０は、商用電源である系統電源２００を補助するために用いられる。 [Second Modification]
As described above, the electric power stored in the storage battery module 10 in the power storage system 100 is used for so-called peak cut to equalize the amount of electric power used by daytime, or backup when the system power supply 200 fails. It is used as a power source. Thus, the storage battery module 10 is used to assist the system power supply 200 which is a commercial power supply.
　太陽光発電システム３００も、蓄電池モジュール１０と同様に、商用電源である系統電源２００を補助するために用いられる。太陽光発電システム３００が発電した電力は、蓄電池モジュール１０を充電するためにも用いられる。 The solar power generation system 300 is also used for assisting the system power supply 200 which is a commercial power supply, like the storage battery module 10. The electric power generated by the solar power generation system 300 is also used for charging the storage battery module 10.
　太陽光発電システム３００における太陽電池３１０が発電した直流電力は、インバータ４１によって交流電力に変換される。この意味で、インバータ４１は、太陽電池３１０が発電した電力を変換する電力変換装置として機能する。 DC power generated by the solar cell 310 in the solar power generation system 300 is converted into AC power by the inverter 41. In this sense, the inverter 41 functions as a power conversion device that converts the power generated by the solar cell 310.
　インバータ４１が変換した電力は、上述した交流電流路に供給される。太陽電池３１０は太陽光を利用して発電するため、太陽電池３１０の発電量は時間によって変動する。また、太陽光発電システム３００は必ずしも蓄電システム１００とともに用いられるとは限らず、太陽光発電システム３００の存在しないシステムもある。 The electric power converted by the inverter 41 is supplied to the AC current path described above. Since the solar cell 310 generates power using sunlight, the power generation amount of the solar cell 310 varies with time. Further, the solar power generation system 300 is not necessarily used together with the power storage system 100, and there is a system in which the solar power generation system 300 does not exist.
　図１に示すように、太陽光発電システム３００は蓄電システム１００とは異なるシステムであり、両者の間の連携が重要となる。例えば、太陽光発電システム３００の出力がある場合に、蓄電システム１００が太陽光発電システム３００の出力がないものとして蓄電池モジュール１０を放電すると、交流電流路に定格以上の電力が出力されかねない。このため、第２の変形例に係る蓄電システム１００は、太陽光発電システム３００と共存するか否かの設定と、実際に太陽光発電システム３００と通信可能か否かを検出する。以下、第２の変形例に係る蓄電システム１００について具体的に説明する。 As shown in FIG. 1, the photovoltaic power generation system 300 is a system different from the power storage system 100, and the cooperation between the two is important. For example, when there is an output of the solar power generation system 300 and the power storage system 100 discharges the storage battery module 10 assuming that there is no output of the solar power generation system 300, power exceeding the rating may be output to the alternating current path. For this reason, the power storage system 100 according to the second modification detects whether or not the photovoltaic power generation system 300 can coexist and whether or not communication with the photovoltaic power generation system 300 is actually possible. Hereinafter, the power storage system 100 according to the second modification will be specifically described.
　図１１は、本発明の第２の変形例に係る蓄電池管理装置１３０を説明するための図である。第２の変形例に係る蓄電池管理装置１３０は、図６に示す蓄電システム１００において、蓄電池管理装置３０に替えて用いられる。このため、第２の変形例に係る蓄電システム１００は、蓄電池管理装置１３０を除き、上述した実施の形態対に係る蓄電システム１００と同様の構成を有する。したがって、以下実施の形態に係る蓄電システム１００と重複する部分は、省略または簡略化して記載する。 FIG. 11 is a diagram for explaining a storage battery management device 130 according to a second modification of the present invention. The storage battery management device 130 according to the second modification is used in place of the storage battery management device 30 in the power storage system 100 shown in FIG. For this reason, the power storage system 100 according to the second modification has the same configuration as the power storage system 100 according to the above-described embodiment pair, except for the storage battery management device 130. Therefore, the description overlapping with the power storage system 100 according to the embodiment is omitted or simplified below.
　蓄電池管理装置１３０は、実施の形態に係る蓄電池管理装置３０と同様に、通信部３１、監視データ取得部３２、ユーザ入力受付部３３、ＳＯＣ算出部３４、充放電制御部３５、発電制御部３６、温度制御部３７、ファン・ヒータ制御部３８、スイッチ制御部３９を備える。蓄電池管理装置１３０は、上述した太陽光発電システム３００と連携するために、使用可否設定部１３６、使用可否記憶部１３８、および通知部１４０をさらに備える。 Similar to the storage battery management device 30 according to the embodiment, the storage battery management device 130 includes a communication unit 31, a monitoring data acquisition unit 32, a user input reception unit 33, an SOC calculation unit 34, a charge / discharge control unit 35, and a power generation control unit 36. A temperature control unit 37, a fan / heater control unit 38, and a switch control unit 39. The storage battery management device 130 further includes an availability setting unit 136, an availability storage unit 138, and a notification unit 140 in order to cooperate with the solar power generation system 300 described above.
　ユーザ入力受付部３３は、太陽光発電システム３００の使用の設定に対するユーザの指示を、操作部８００を介して取得する。ユーザ入力受付部３３が取得した指示が太陽光発電システム３００の使用の設定を無効とする場合、使用可否設定部１３６は、インバータ４１の使用が無効であることを使用可否記憶部１３８に格納する。なお、使用可否設定部１３６は、ユーザ入力受付部３３が取得した指示が使用の設定を有効とする場合、太陽電池３１０が発電した電力を変換する電力変換装置であるインバータ４１の使用が有効であることを使用可否記憶部１３８に格納してもよい。 The user input reception unit 33 acquires a user instruction for setting to use the solar power generation system 300 via the operation unit 800. When the instruction acquired by the user input reception unit 33 invalidates the use setting of the photovoltaic power generation system 300, the availability setting unit 136 stores in the availability storage unit 138 that the use of the inverter 41 is invalid. . In addition, when the instruction acquired by the user input receiving unit 33 validates the use setting, the use permission setting unit 136 can effectively use the inverter 41 that is a power conversion device that converts the power generated by the solar cell 310. Something may be stored in the availability storage unit 138.
　使用可否記憶部１３８は、インバータ４１の使用が有効か無効かの設定を記憶するメモリであり、例えばインバータ４１の使用が有効である場合には１、無効である場合には０のように、有効か無効かを示す情報を格納する不揮発性メモリを用いて実現できる。 The usability storage unit 138 is a memory that stores a setting of whether the use of the inverter 41 is valid or invalid. For example, 1 is used when the use of the inverter 41 is valid, and 0 is used when the use of the inverter 41 is invalid. This can be realized by using a non-volatile memory that stores information indicating validity or invalidity.
　通信部３１は、インバータ４１との通信接続を試みて、インバータ４１と接続可能であれば通信を確立する。使用可否設定部１３６は、インバータ４１の使用が無効の設定となっている場合に、通信部３１がインバータ４１から通信データを受信したときは、使用可否記憶部１３８が記憶するインバータ４１の使用の設定を自動で有効に変更する。これにより、太陽光発電システム３００の出力がないものとして蓄電池モジュール１０を放電させることによって、交流電流路に定格以上の電力が供給されることを防止できる。蓄電システム１００のユーザまたは施工者は、手動で設定変更をすることが省略でき，ユーザビリティが向上する。 The communication unit 31 attempts communication connection with the inverter 41 and establishes communication if connection with the inverter 41 is possible. When the communication unit 31 receives communication data from the inverter 41 when the use of the inverter 41 is disabled, the usability setting unit 136 uses the inverter 41 stored in the usability storage unit 138. Change the setting automatically to enabled. Thereby, it can prevent that the electric power more than a rating is supplied to an alternating current path by discharging the storage battery module 10 as what does not have the output of the solar power generation system 300. FIG. The user or contractor of the power storage system 100 can omit changing the setting manually, and usability is improved.
　太陽光発電システム３００が存在する場合、充放電制御部３５は、蓄電池モジュール１０の放電量を抑制する。このため、太陽光発電システム３００が存在しないにも関わらず、インバータ４１の使用が有効設定となっている場合には、蓄電池モジュール１０から十分に電力を供給することができなくなりうる。また、太陽光発電システム３００が存在する場合であっても、夜間等において太陽電池３１０の発電がない場合には、インバータ４１の電源がオフとなって通信部３１との通信が切断されることもある。 When the solar power generation system 300 exists, the charge / discharge control unit 35 suppresses the discharge amount of the storage battery module 10. For this reason, even if the photovoltaic power generation system 300 does not exist, when the use of the inverter 41 is set to be effective, it may not be possible to supply sufficient power from the storage battery module 10. Further, even when the solar power generation system 300 exists, when there is no power generation of the solar cell 310 at night or the like, the power of the inverter 41 is turned off and the communication with the communication unit 31 is disconnected. There is also.
　そこで通知部１４０は、使用可否設定部１３６がインバータ４１の使用を有効設定とした場合において、通信部３１がインバータ４１との間で所定の時間内に通信が確立できずに通信が断絶している場合、その旨をエラー通知として表示装置７００に出力する。これにより、ユーザは太陽電池３１０の故障など、太陽光発電システム３００のトラブルを認識することが可能となる。 Therefore, when the availability setting unit 136 sets the use of the inverter 41 to be valid, the notification unit 140 disconnects the communication because the communication unit 31 cannot establish communication with the inverter 41 within a predetermined time. If so, this is output to the display device 700 as an error notification. Thereby, the user can recognize troubles of the solar power generation system 300 such as a failure of the solar battery 310.
　ここで「所定の時間」とは、夜間等において太陽電池３１０の発電がないためインバータ４１の電源がオフとなって通信部３１との通信が切断されているのか、またはインバータ４１の故障等の理由で通信部３１との通信が切断されているのかを切り分けるために定められた待機時間である。インバータ４１の故障等の理由で通信部３１との通信が切断されている場合は、何らかの手段を講じない限り、通信部３１との間の通信が回復する見込みは少ないと考えられる。一方、夜間等において太陽電池３１０の発電がないためインバータ４１の電源がオフとなって通信部３１との通信が切断されている場合であれば、夜明け後にインバータ４１の電源がオンとなり、通信部３１との間の通信が回復する。そこで、「所定の時間」として一夜の長さ以上の時間を設定すればよく、一例としては２４時間である。 Here, the “predetermined time” refers to whether the inverter 41 is turned off and communication with the communication unit 31 is disconnected because there is no power generation of the solar cell 310 at night, or a failure of the inverter 41 or the like. This is a standby time that is set to determine whether the communication with the communication unit 31 is disconnected for the reason. If communication with the communication unit 31 is cut off due to a failure of the inverter 41 or the like, the communication with the communication unit 31 is unlikely to be recovered unless some measure is taken. On the other hand, if the power of the inverter 41 is turned off and communication with the communication unit 31 is disconnected because there is no power generation of the solar cell 310 at night or the like, the power of the inverter 41 is turned on after dawn, and the communication unit Communication with 31 is restored. Therefore, the “predetermined time” may be set to a time longer than the length of one night, and is 24 hours as an example.
　使用可否設定部１３６は、ユーザ入力受付部３３が太陽光発電システム３００の使用を無効とすべき指示をユーザから受け取ると、インバータ４１の使用を無効の設定とする。例えば太陽電池３１０の故障など、ユーザが何らかの理由で太陽光発電システム３００の使用を無効設定とすることを望む場合に、簡便に設定変更をすることができる。 When the user input reception unit 33 receives an instruction from the user to invalidate the use of the solar power generation system 300, the use permission setting unit 136 sets the use of the inverter 41 to invalid. For example, when the user desires to disable the use of the solar power generation system 300 for some reason, such as a failure of the solar battery 310, the setting can be easily changed.
　上述したように、太陽光発電システム３００は必ずしも蓄電システム１００とともに用いられるとは限られない。仮に、蓄電システム１００の出荷時の初期設定としてインバータ４１の使用が有効と設定されていると、太陽光発電システム３００が存在しないシステムに蓄電システム１００を設置した場合、通知部１４０は、インバータ４１の使用が有効設定であるにも関わらず通信できないため、エラー通知を表示することになる。そのため、第２の変形例に係る使用可否記憶部１３８は、出荷時の初期設定としてインバータ４１の使用は無効と設定されている。これにより、太陽光発電システム３００を使用しない場合に蓄電システム１００が設置されたときに、通知部１４０がエラー通知を表示することがなくなる。 As described above, the solar power generation system 300 is not necessarily used together with the power storage system 100. If the use of the inverter 41 is set to be valid as an initial setting at the time of shipment of the power storage system 100, when the power storage system 100 is installed in a system where the solar power generation system 300 does not exist, the notification unit 140 causes the inverter 41 to An error notification is displayed because communication is not possible even though the use of is enabled. Therefore, in the usability storage unit 138 according to the second modification, the use of the inverter 41 is set to be invalid as an initial setting at the time of shipment. Thereby, when the power storage system 100 is installed when the solar power generation system 300 is not used, the notification unit 140 does not display an error notification.
　また、太陽光発電システム３００を使用する場合に蓄電システム１００を設置した場合、使用可否設定部１３６は、通信部３１がインバータ４１から通信データを受信することを契機として、使用可否記憶部１３８が記憶するインバータ４１の使用の設定を自動で有効に変更する。これにより、ユーザまたは蓄電システム１００の施工者は、設置時に蓄電システム１００の使用設定を変更する手間を省くこともできる。 In addition, when the power storage system 100 is installed when using the solar power generation system 300, the availability setting unit 136 causes the availability storage unit 138 to be triggered by the communication unit 31 receiving communication data from the inverter 41. The stored use setting of the inverter 41 is automatically and effectively changed. Thereby, the user or the installer of the electrical storage system 100 can also save the effort which changes the use setting of the electrical storage system 100 at the time of installation.
　図１２は、第２の変形例に係る蓄電池管理装置１３０における、インバータ４１の使用可能設定への自動変更処理の流れを説明するフローチャートである。 FIG. 12 is a flowchart for explaining the flow of the automatic change process to the usable setting of the inverter 41 in the storage battery management device 130 according to the second modification.
　使用可否設定部１３６は、使用可否記憶部１３８を参照し、電力変換装置であるインバータ４１の使用可否設定を確認する（Ｓ５０）。インバータ４１の使用可否設定が有効の場合（Ｓ５１のＹ）、ステップＳ５０に戻り、使用可否設定部１３６は、インバータ４１の使用可否設定の確認処理を継続する。 The availability setting unit 136 refers to the availability storage unit 138 and confirms the availability setting of the inverter 41 that is the power converter (S50). When the availability setting of the inverter 41 is valid (Y in S51), the process returns to step S50, and the availability setting unit 136 continues the confirmation process of the availability setting of the inverter 41.
　インバータ４１の使用可否設定が無効の場合（Ｓ５１のＮ）、通信部３１はインバータ４１との間の通信が確立できるか否かを検証する（Ｓ５２）。通信部３１がインバータ４１から送信されたデータを受信することでデータ通信が確認できた場合（Ｓ５３のＹ）、使用可否設定部１３６は、インバータ４１の使用設定を有効化し、使用可否記憶部１３８に格納する（Ｓ５４）。使用可否設定部１３６がインバータ４１使用設定を有効化するか、あるいは通信部３１がインバータ４１から送信されたデータを受信できない場合（Ｓ５３のＮ）、本フローチャートにおける処理は終了する。 When the availability setting of the inverter 41 is invalid (N in S51), the communication unit 31 verifies whether communication with the inverter 41 can be established (S52). When the data communication can be confirmed by the communication unit 31 receiving the data transmitted from the inverter 41 (Y in S53), the availability setting unit 136 validates the usage setting of the inverter 41, and the availability storage unit 138. (S54). When the usability setting unit 136 validates the use setting of the inverter 41 or when the communication unit 31 cannot receive the data transmitted from the inverter 41 (N in S53), the processing in this flowchart ends.
　図１３は、第２の変形例に係る蓄電池管理装置１３０における、エラー通知処理の流れを説明するフローチャートである。 FIG. 13 is a flowchart for explaining the flow of error notification processing in the storage battery management device 130 according to the second modification.
　使用可否設定部１３６は、使用可否記憶部１３８を参照し、電力変換装置であるインバータ４１の使用可否設定を確認する（Ｓ６０）。インバータ４１の使用可否設定が無効の場合（Ｓ６１のＮ）、ステップＳ６０に戻り、使用可否設定部１３６は、インバータ４１の使用可否設定の確認処理を継続する。 The availability setting unit 136 refers to the availability storage unit 138 and confirms the availability setting of the inverter 41 that is the power converter (S60). When the availability setting of the inverter 41 is invalid (N in S61), the process returns to step S60, and the availability setting unit 136 continues the confirmation process of the availability setting of the inverter 41.
　インバータ４１の使用可否設定が有効の場合（Ｓ６１のＹ）、通信部３１はインバータ４１との間の通信が確立できるか否かを検証する（Ｓ６２）。通信部３１がインバータ４１から送信されたデータを所定の時間内に受信できず、データ通信が確認できない場合（Ｓ６３のＮ）、通知部１４０は、インバータ４１の使用可否設定が有効であるがインバータ４１と通信できないことをエラーとしてユーザに通知する（Ｓ６４）。 When the availability setting of the inverter 41 is valid (Y in S61), the communication unit 31 verifies whether communication with the inverter 41 can be established (S62). When the communication unit 31 cannot receive the data transmitted from the inverter 41 within a predetermined time and the data communication cannot be confirmed (N in S63), the notification unit 140 uses the inverter 41 availability setting that is valid. The user is notified of the inability to communicate with the terminal 41 as an error (S64).
　通知部１４０がエラー通知をするか、あるいは通信部３１がインバータ４１から送信されたデータを受信した場合（Ｓ６３のＹ）、本フローチャートにおける処理は終了する。 When the notification unit 140 gives an error notification, or when the communication unit 31 receives data transmitted from the inverter 41 (Y in S63), the processing in this flowchart ends.
　図１４は、第２の変形例に係る蓄電池管理装置１３０における、インバータ４１の使用可能設定への手動変更処理の流れを説明するフローチャートである。 FIG. 14 is a flowchart for explaining the flow of the manual change process to the usable setting of the inverter 41 in the storage battery management device 130 according to the second modification.
　ユーザ入力受付部３３は、太陽光発電システム３００の使用可否設定、すなわち電力変換装置であるインバータ４１の使用可否設定に関するユーザの指示を待機する（Ｓ７０）。ユーザ入力受付部３３がインバータ４１の使用の無効設定を取得しない間（Ｓ７１のＮ）、ユーザ入力受付部３３は、ステップＳ７０に戻ってユーザの指示の待機処理を継続する。 The user input reception unit 33 waits for a user instruction regarding the availability setting of the photovoltaic power generation system 300, that is, the availability setting of the inverter 41 that is the power converter (S70). While the user input receiving unit 33 does not acquire the invalid setting for using the inverter 41 (N in S71), the user input receiving unit 33 returns to step S70 and continues the standby process of the user instruction.
　ユーザ入力受付部３３がインバータ４１の使用の無効設定を取得すると（Ｓ７１のＹ）、使用可否設定部１３６はインバータ４１の使用設定を無効化し、使用可否記憶部１３８に格納する（Ｓ７２）。使用可否設定部１３６がインバータ４１の使用設定を無効化すると、本フローチャートにおける処理は終了する。 When the user input accepting unit 33 acquires the invalid setting for use of the inverter 41 (Y in S71), the usability setting unit 136 invalidates the use setting of the inverter 41 and stores it in the usability storage unit 138 (S72). When the usability setting unit 136 invalidates the use setting of the inverter 41, the processing in this flowchart ends.
　図１５（ａ）－（ｄ）は、通知部１４０が表示装置７００に表示させる表示画面の一例を示す図である。表示装置７００は蓄電池管理装置１３０による制御の下、各種設定画面、蓄電池モジュール１０および太陽光発電システム３００のステータス情報などを表示する。この意味で、表示装置７００は蓄電池管理装置１３０の表示部として機能する。また、蓄電池管理装置１３０と表示装置７００とを合わせて、太陽光発電システム３００の状態を表示する表示装置として機能する。表示装置７００は、例えばＬＣＤ（Liquid Crystal Display）、ＬＥＤ（Light Emitting Diode）、有機ＥＬ（Electro-Luminescence）パネル等、既知の発光素子や表示デバイスを用いて実現できる。 FIGS. 15A to 15D are diagrams showing examples of display screens that the notification unit 140 displays on the display device 700. FIG. The display device 700 displays various setting screens, status information of the storage battery module 10 and the photovoltaic power generation system 300 under the control of the storage battery management device 130. In this sense, the display device 700 functions as a display unit of the storage battery management device 130. The storage battery management device 130 and the display device 700 together function as a display device that displays the state of the solar power generation system 300. The display device 700 can be realized by using known light emitting elements and display devices such as an LCD (Liquid Crystal Display), an LED (Light Emitting Diode), and an organic EL (Electro-Luminescence) panel.
　図１５（ａ）は、インバータ４１の使用設定が有効の場合の表示装置７００が表示する画面を示す図である。例えば、使用可否設定部１３６がインバータ４１の使用設定を変更した場合に、通知部１４０が表示装置７００に表示させる変更後の使用設定を示す画面である。 FIG. 15A is a diagram showing a screen displayed on the display device 700 when the use setting of the inverter 41 is valid. For example, when the usability setting unit 136 changes the use setting of the inverter 41, this is a screen showing the changed use setting that the notification unit 140 displays on the display device 700.
　図１５（ｂ）は、インバータ４１の使用設定が無効の場合の表示装置７００が表示する画面を示す図である。使用可否記憶部１３８は、出荷時の初期設定としてインバータ４１の使用は無効と設定されている。図１５（ｂ）は、例えば、使用可否記憶部１３８が初期設定のとき、通知部１４０が表示装置７００に表示させる画面である。 FIG. 15B is a diagram showing a screen displayed on the display device 700 when the use setting of the inverter 41 is invalid. The usability storage unit 138 is set to disable the use of the inverter 41 as an initial setting at the time of shipment. FIG. 15B shows, for example, a screen that the notification unit 140 displays on the display device 700 when the usability storage unit 138 is initially set.
　図１５（ｃ）は、インバータ４１の使用設定を初期化するか否かの選択をユーザに示す画面例である。ユーザは操作部８００を介して、使用可否設定部１３６にインバータ４１の使用設定を初期化するか否かを指示することができる。なお、操作部８００を介してユーザ入力受付部３３がインバータ４１の使用の無効設定を取得すると、使用可否設定部１３６がインバータ４１の使用設定を無効化する。このとき、通知部１４０は図１５（ｂ）に示す画面を表示装置７００に表示させる。 FIG. 15C is an example of a screen showing the user whether or not to initialize the use setting of the inverter 41. The user can instruct the usability setting unit 136 via the operation unit 800 whether to initialize the use setting of the inverter 41. Note that when the user input reception unit 33 obtains the invalid setting of the use of the inverter 41 via the operation unit 800, the usability setting unit 136 invalidates the use setting of the inverter 41. At this time, the notification unit 140 causes the display device 700 to display the screen illustrated in FIG.
　図１５（ｄ）は、通知部１４０が表示装置７００に表示させるエラー通知画面の一例を示す図である。より具体的に、図１５（ｄ）は、インバータ４１の使用可否設定が有効の場合において通信部３１がインバータ４１から送信されたデータを所定の時間内に受信できないときに、通知部１４０が表示装置７００に表示させる画面を示している。 FIG. 15D is a diagram illustrating an example of an error notification screen that the notification unit 140 causes the display device 700 to display. More specifically, FIG. 15D shows the notification unit 140 when the communication unit 31 cannot receive the data transmitted from the inverter 41 within a predetermined time when the availability setting of the inverter 41 is valid. The screen displayed on the apparatus 700 is shown.
　以上説明したように、本発明の第２の変形例によれば、商用電源である系統電源２００を補助するための蓄電システム１００において、蓄電池モジュール１０と太陽光発電システム３００との連携の設定を容易にすることができる。 As described above, according to the second modification of the present invention, in the power storage system 100 for assisting the system power supply 200 that is a commercial power supply, the setting of the cooperation between the storage battery module 10 and the solar power generation system 300 is performed. Can be easily.
　なお、本発明の第２の変形例は、系統電源２００に接続された蓄電システム１００に太陽光発電システム３００を連携させる際、太陽光発電システム３００をＰＶパワーコンディショナ４０を介して蓄電システム１００に接続する。即ち、交流出力で蓄電池モジュール１０及び系統電源２００と接続することを前提とした。しかしながら、太陽光発電システム３００を、蓄電池パワーコンディショナ２０の直流側に接続するシステムにおいても、本発明の第２の変形例が適用できることは、当業者であれば容易に理解できることである。この場合、太陽電池３１０が発電した直流電力を変換するＤＣ－ＤＣコンバータが、本発明における電力変換装置として機能する。 In the second modification of the present invention, when the solar power generation system 300 is linked to the power storage system 100 connected to the system power supply 200, the solar power generation system 300 is connected to the power storage system 100 via the PV power conditioner 40. Connect to. That is, it was assumed that the storage battery module 10 and the system power supply 200 were connected with an AC output. However, those skilled in the art can easily understand that the second modification of the present invention can also be applied to a system in which the photovoltaic power generation system 300 is connected to the direct current side of the storage battery power conditioner 20. In this case, the DC-DC converter that converts the DC power generated by the solar cell 310 functions as the power conversion device according to the present invention.
　上述の実施の形態および各変形例では系統電源に接続された蓄電システム１００に太陽光発電システム３００を連携する例を説明した。この点、本発明に係る蓄電システムは太陽光発電システム３００以外の、再生可能エネルギーをもとに発電する発電装置と連携することもできる。例えば直流出力の、風力発電装置、マイクロ水力発電装置などが該当する。 In the above embodiment and each modification, the example in which the photovoltaic power generation system 300 is linked to the power storage system 100 connected to the system power supply has been described. In this regard, the power storage system according to the present invention can be linked to a power generation apparatus that generates power based on renewable energy other than the solar power generation system 300. For example, a wind power generator or a micro hydroelectric generator with a direct current output is applicable.
　なお、本実施の形態に係る発明は、以下に記載する項目によって特定されてもよい。 The invention according to the present embodiment may be specified by the items described below.
［項目１－１］
　蓄電池と、
　前記蓄電池に充電するとき交流電力から直流電力に変換し、前記蓄電池から放電するとき直流電力から交流電力に変換する第１インバータと、
　再生可能エネルギーをもとに発電する発電装置により発電された直流電力を交流電力に変換する第２インバータと、
　前記第１インバータの交流側端子と、前記第２インバータの交流側端子と、系統電源とを導通させるための交流電流路と、
　を備えることを特徴とする蓄電システム。
［項目１－２］
　前記交流電流路には、系統電源の停電時にて、優先的に前記蓄電池または前記発電装置から電力供給を受けることができる予め設定された特定の負荷が接続されることを特徴とする項目１－１に記載の蓄電システム。
［項目１－３］
　ヒータと、ファンと、管理装置と、をさらに備え、
　前記管理装置は、前記蓄電池を加熱する場合、前記ヒータと前記ファンを稼動させることを特徴とする項目１－１または１－２に記載の蓄電システム。
［項目１－４］
　前記管理装置は、停電時に前記蓄電池から放電していない状態にて、前記ヒータおよび前記ファンを非稼働に制御することを特徴とする項目１－３に記載の蓄電システム。
［項目１－５］
　前記蓄電池を管理するための管理装置を、さらに備え、
　前記管理装置は、前記第２インバータから前記発電装置が発電しているか否かを示す情報を取得し、系統電源の停電時に前記蓄電池から放電していない状態にて前記発電装置が発電していない場合、前記第１インバータ及び前記第２インバータの電源をオフ、又は前記第１インバータ及び前記第２インバータをスリープさせることを特徴とする項目１－１または１－２に記載の蓄電システム。 [Item 1-1]
A storage battery,
A first inverter that converts AC power to DC power when charging the storage battery, and converts DC power to AC power when discharging from the storage battery;
A second inverter that converts DC power generated by a power generation device that generates power based on renewable energy into AC power;
An AC current path for conducting the AC side terminal of the first inverter, the AC side terminal of the second inverter, and a system power supply;
A power storage system comprising:
[Item 1-2]
The AC current path is connected to a predetermined specific load that can receive power supply from the storage battery or the power generation device preferentially in the event of a power failure of the system power supply. 2. The power storage system according to 1.
[Item 1-3]
A heater, a fan, and a management device;
3. The power storage system according to item 1-1 or 1-2, wherein the management device operates the heater and the fan when the storage battery is heated.
[Item 1-4]
4. The power storage system according to item 1-3, wherein the management device controls the heater and the fan to be non-operating in a state where the storage battery is not discharged during a power failure.
[Item 1-5]
A management device for managing the storage battery,
The management device acquires information indicating whether or not the power generation device is generating power from the second inverter, and the power generation device is not generating power in a state in which the storage battery is not discharged at the time of a power failure of the system power supply In this case, the power storage system according to item 1-1 or 1-2, wherein the power source of the first inverter and the second inverter is turned off, or the first inverter and the second inverter are caused to sleep.
［項目２－１］
　商用電源を補助するための蓄電池の充放電を管理する充放電制御部と、
　再生可能エネルギーをもとに発電する発電装置により発電された電力を変換する電力変換装置と通信する通信部と、
　前記電力変換装置の使用が有効か無効かを設定する使用可否設定部とを備え、
　前記使用可否設定部は、前記電力変換装置の使用が無効の設定となっている場合に、前記通信部が前記電力変換装置からデータを受信したときは、前記電力変換装置の使用を有効の設定に変更することを特徴とする蓄電池管理装置。
［項目２－２］
　前記使用可否設定部が前記電力変換装置の使用を有効の設定とした場合において、前記通信部が前記電力変換装置との間で通信が断絶している場合、その旨を表示装置に出力する通知部をさらに備えることを特徴とする項目２－１に記載の蓄電池管理装置。
［項目２－３］
　前記使用可否設定部における前記電力変換装置の使用の設定に対するユーザの指示を取得するユーザ入力受付部をさらに備え、
　前記使用可否設定部は、前記ユーザ入力受付部が前記電力変換装置の使用を無効とすべき指示を受け取ると、前記電力変換装置の使用を無効の設定とすることを特徴とする項目２－１または２－２に記載の蓄電池管理装置。
［項目２－４］
　蓄電池の充放電を管理する充放電制御部と、
　再生可能エネルギーをもとに発電する発電装置により発電された電力を変換する電力変換装置と通信する通信部と、
　前記電力変換装置の使用が有効か無効かを設定する使用可否設定部と、
　前記電力変換装置の使用の設定を表示する表示部とを備える蓄電システムにおいて、
　前記使用可否設定部は、前記電力変換装置の使用が無効の設定となっている場合に、前記通信部が前記電力変換装置からデータを受信したときは、前記電力変換装置の使用を有効の設定に変更し、
　前記表示部は、前記使用可否設定部が前記電力変換装置の使用設定を変更した場合、変更後の使用設定を表示することを特徴とする表示装置。
［項目２－５］
　前記使用可否設定部が前記電力変換装置の使用を有効の設定とした場合において、前記通信部が前記電力変換装置との間で通信が断絶している場合、その旨を前記表示部に出力する通知部をさらに備える蓄電池ステムにおいて、
　前記その旨を表示させることを特徴とする項目２－４に記載の表示装置。
［項目２－６］
　前記使用可否設定部における前記電力変換装置の使用の設定に対するユーザの指示を取得するユーザ入力受付部をさらに備え、
　前記使用可否設定部は、前記ユーザ入力受付部が前記電力変換装置の使用を無効とすべき指示を受け取ると、前記電力変換装置の使用を無効の設定とすることを備える蓄電システムにおいて、使用設定を表示することを特徴とする項目２－４または２－５に記載の表示装置。 [Item 2-1]
A charge / discharge control unit for managing charge / discharge of the storage battery for assisting the commercial power supply;
A communication unit that communicates with a power conversion device that converts power generated by a power generation device that generates power based on renewable energy; and
An availability setting unit that sets whether the use of the power conversion device is valid or invalid,
When the use of the power conversion device is set to be invalid and the communication unit receives data from the power conversion device, the availability setting unit is set to enable use of the power conversion device. A storage battery management device characterized by changing to
[Item 2-2]
In the case where the availability setting unit sets the use of the power conversion device as valid, and the communication unit is disconnected from the power conversion device, a notification to output to that effect to the display device The storage battery management device according to item 2-1, further comprising a section.
[Item 2-3]
A user input receiving unit for acquiring a user instruction for setting of use of the power conversion device in the availability setting unit;
The availability setting unit sets the use of the power converter as invalid when the user input reception unit receives an instruction to invalidate the use of the power converter. Or the storage battery management apparatus as described in 2-2.
[Item 2-4]
A charge / discharge control unit for managing charge / discharge of the storage battery;
A communication unit that communicates with a power conversion device that converts power generated by a power generation device that generates power based on renewable energy; and
An availability setting unit for setting whether the use of the power converter is valid or invalid;
In a power storage system comprising a display unit that displays setting of use of the power conversion device,
When the use of the power conversion device is set to be invalid and the communication unit receives data from the power conversion device, the availability setting unit is set to enable use of the power conversion device. To
The said display part displays the use setting after a change, when the said availability setting part changes the use setting of the said power converter device, The display apparatus characterized by the above-mentioned.
[Item 2-5]
In the case where the usability setting unit sets the use of the power conversion device as valid, if the communication unit is disconnected from the power conversion device, the fact is output to the display unit. In the storage battery stem further comprising a notification unit,
Item 5. The display device according to Item 2-4, which displays the fact.
[Item 2-6]
A user input receiving unit for acquiring a user instruction for setting of use of the power conversion device in the availability setting unit;
When the user input reception unit receives an instruction to invalidate the use of the power conversion device, the use availability setting unit is configured to set the use of the power conversion device as invalid. 6. The display device according to item 2-4 or 2-5, wherein the display device is displayed.
　１００　蓄電システム、　１１０　筐体、　１１１　第１空気孔、　１１２　取っ手、　１１３　第２空気孔、　１１４　第３空気孔、　１１５，１１６　入線孔、　１０　蓄電池モジュール、　１１　蓄電池セル、　１２　電圧センサ、　１３　電流センサ、　１４　温度センサ、　２０　蓄電池パワーコンディショナ、　２１　双方向インバータ、　２２　制御回路、　３０、１３０　蓄電池管理装置、　３１　通信部、　３２　監視データ取得部、　３３　ユーザ入力受付部、　３４　ＳＯＣ算出部、　３５　充放電制御部、　３６　発電制御部、　３７　温度制御部、　３８　ファン・ヒータ制御部、　３９　スイッチ制御部、　４０　ＰＶパワーコンディショナ、　４１　インバータ、　４２　制御回路、　５０　インバータファン、　６０　蓄電池ファン、　７０　ヒータ、　２００　系統電源、　３００　太陽光発電システム、　４００　一般負荷、　５００　特定負荷、　６００　温度センサ、　Ｓ１　第１スイッチ、　Ｓ２　第２スイッチ、　Ｓ３　第３スイッチ、　Ｓ４　第４スイッチ、　Ｓ５　第５スイッチ、　Ｓ６　第６スイッチ、　Ｓ７　第７スイッチ、　Ｓ８　第８スイッチ、　Ｓ９　第９スイッチ、　Ｂ１　第１ブレーカ、　Ｂ２　第２ブレーカ、　Ｂ３　第３ブレーカ、１３６　使用可否設定部、　１３８　使用可否記憶部、　１４０　通知部。 100 power storage system, 110 housing, 111 first air hole, 112 handle, 113 second air hole, 114 third air hole, 115, 116 inlet hole, 10 storage battery module, 11 storage battery cell, 12 voltage sensor, 13 current sensor , 14 temperature sensor, 20 storage battery power conditioner, 21 bidirectional inverter, 22 control circuit, 30, 130 storage battery management device, 31 communication unit, 32 monitoring data acquisition unit, 33 user input reception unit, 34 SOC calculation unit, 35 charge Discharge control unit, 36 Power generation control unit, 37 Temperature control unit, 38 Fan / heater control unit, 39 Switch control unit, 40 PV power conditioner, 41 inverter, 42 control circuit, 50 inverter , 60 storage battery fan, 70 heater, 200 system power supply, 300 solar power generation system, 400 general load, 500 specific load, 600 temperature sensor, S1 first switch, S2 second switch, S3 third switch, S4 fourth switch , S5 5th switch, S6 6th switch, S7 7th switch, S8 8th switch, S9 9th switch, B1 1st breaker, B2 2nd breaker, B3 3rd breaker, 136 usability setting part, 138 availability Storage unit, 140 notification unit.
　本発明は、太陽光発電システムと連携する蓄電システムに利用可能である。 The present invention can be used for a power storage system that cooperates with a solar power generation system.

Claims (6)

  1. 　蓄電池の充放電を管理する充放電制御部と、
    　再生可能エネルギーをもとに発電する発電装置により発電された電力を変換する電力変換装置と通信する通信部と、
    　前記電力変換装置の使用が有効か無効かを設定する使用可否設定部とを備え、
    　前記使用可否設定部は、前記電力変換装置の使用が無効の設定となっている場合に、前記通信部が前記電力変換装置からデータを受信したときは、前記電力変換装置の使用を有効の設定に変更することを特徴とする蓄電池管理装置。     A charge / discharge control unit for managing charge / discharge of the storage battery;
    A communication unit that communicates with a power conversion device that converts power generated by a power generation device that generates power based on renewable energy; and
    An availability setting unit that sets whether the use of the power conversion device is valid or invalid,
    When the use of the power conversion device is set to be invalid and the communication unit receives data from the power conversion device, the availability setting unit is set to enable use of the power conversion device. A storage battery management device characterized by changing to
  2. 　前記使用可否設定部が前記電力変換装置の使用を有効の設定とした場合において、前記通信部が前記電力変換装置との間で通信が断絶している場合、その旨を表示装置に出力する通知部をさらに備えることを特徴とする請求項１に記載の蓄電池管理装置。 In the case where the availability setting unit sets the use of the power conversion device as valid, and the communication unit is disconnected from the power conversion device, a notification to output to that effect to the display device The storage battery management apparatus according to claim 1, further comprising a unit.
  3. 　前記使用可否設定部における前記電力変換装置の使用の設定に対するユーザの指示を取得するユーザ入力受付部をさらに備え、
    　前記使用可否設定部は、前記ユーザ入力受付部が前記電力変換装置の使用を無効とすべき指示を受け取ると、前記電力変換装置の使用を無効の設定とすることを特徴とする請求項１または２に記載の蓄電池管理装置。     A user input receiving unit for acquiring a user instruction for setting of use of the power conversion device in the availability setting unit;
    The use setting unit sets the use of the power conversion device as invalid when the user input reception unit receives an instruction to invalidate the use of the power conversion device. 2. The storage battery management device according to 2.
  4. 　蓄電池の充放電を管理する充放電制御部と、
    　再生可能エネルギーをもとに発電する発電装置により発電された電力を変換する電力変換装置と通信する通信部と、
    　前記電力変換装置の使用が有効か無効かを設定する使用可否設定部と、
    　前記電力変換装置の使用の設定を表示する表示部とを備える蓄電システムにおいて、
    　前記使用可否設定部は、前記電力変換装置の使用が無効の設定となっている場合に、前記通信部が前記電力変換装置からデータを受信したときは、前記電力変換装置の使用を有効の設定に変更し、
    　前記表示部は、前記使用可否設定部が前記電力変換装置の使用設定を変更した場合、変更後の使用設定を表示することを特徴とする表示装置。     A charge / discharge control unit for managing charge / discharge of the storage battery;
    A communication unit that communicates with a power conversion device that converts power generated by a power generation device that generates power based on renewable energy; and
    An availability setting unit for setting whether the use of the power converter is valid or invalid;
    In a power storage system comprising a display unit that displays setting of use of the power conversion device,
    When the use of the power conversion device is set to be invalid and the communication unit receives data from the power conversion device, the availability setting unit is set to enable use of the power conversion device. To
    The said display part displays the use setting after a change, when the said availability setting part changes the use setting of the said power converter device, The display apparatus characterized by the above-mentioned.
  5. 　前記使用可否設定部が前記電力変換装置の使用を有効の設定とした場合において、前記通信部が前記電力変換装置との間で通信が断絶している場合、その旨を前記表示部に出力する通知部をさらに備える蓄電池ステムにおいて、
    　前記その旨を表示させることを特徴とする請求項４に記載の表示装置。     In the case where the usability setting unit sets the use of the power conversion device as valid, if the communication unit is disconnected from the power conversion device, the fact is output to the display unit. In the storage battery stem further comprising a notification unit,
    The display device according to claim 4, wherein the fact is displayed.
  6. 　前記使用可否設定部における前記電力変換装置の使用の設定に対するユーザの指示を取得するユーザ入力受付部をさらに備え、
    　前記使用可否設定部は、前記ユーザ入力受付部が前記電力変換装置の使用を無効とすべき指示を受け取ると、前記電力変換装置の使用を無効の設定とすることを備える蓄電システムにおいて、使用設定を表示することを特徴とする請求項４または５に記載の表示装置。     A user input receiving unit for acquiring a user instruction for setting of use of the power conversion device in the availability setting unit;
    When the user input reception unit receives an instruction to invalidate the use of the power conversion device, the use availability setting unit is configured to set the use of the power conversion device as invalid. The display device according to claim 4, wherein the display device is displayed.
PCT/JP2013/004778 2013-08-07 2013-08-07 Storage battery management device and display device WO2015019386A1 (en)

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WO2018063620A1 (en) * 2016-09-30 2018-04-05 General Electric Company Charging sub-system for charging energy storage device and power generation system using the same

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