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WO2011077219A2 - Système d'alimentation électrique - Google Patents

Système d'alimentation électrique Download PDF

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Publication number
WO2011077219A2
WO2011077219A2 PCT/IB2010/003300 IB2010003300W WO2011077219A2 WO 2011077219 A2 WO2011077219 A2 WO 2011077219A2 IB 2010003300 W IB2010003300 W IB 2010003300W WO 2011077219 A2 WO2011077219 A2 WO 2011077219A2
Authority
WO
WIPO (PCT)
Prior art keywords
power
zone
storage battery
control device
individual
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/IB2010/003300
Other languages
English (en)
Japanese (ja)
Other versions
WO2011077219A3 (fr
Inventor
清隆 竹原
賢二 中北
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Panasonic Electric Works Co Ltd
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 Panasonic Electric Works Co Ltd filed Critical Panasonic Electric Works Co Ltd
Publication of WO2011077219A2 publication Critical patent/WO2011077219A2/fr
Publication of WO2011077219A3 publication Critical patent/WO2011077219A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • H02J2101/24—
    • 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
    • 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
    • Y02B10/10—Photovoltaic [PV]
    • 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

Definitions

  • the present invention relates to a power supply system that distributes power from a commercial power source to a plurality of individual areas included in a specified zone.
  • Patent Document 1 an electric power supply control device is installed between all the customers who make up the group and the electric power system to which the electric utility supplies power when allocating the electric power supplied from the electric utility.
  • the power supply control device adjusts the power supply / demand balance by monitoring the amount of power demand from consumers.
  • the technology described in Patent Document 1 is that at least some of the customers in the group are provided with a distributed power source such as a micro gas turbine power generation device, a solar power generation device, a wind power generation device, and a fuel cell. This is an assumed technology.
  • Patent Document 1 Japanese Unexamined Patent Publication No. 2 0 0 2-1 0 4 9 9
  • the present invention has been made in view of the above reasons, and distributes power from a commercial power source to a plurality of individual areas included in a specified zone and supplies the power from the commercial power source to the zone without complicated calculations.
  • An electric power supply system that enables leveling of electric power demand is provided.
  • a zone power meter that measures the amount of power used in a specified zone
  • a distribution board that distributes power to a plurality of individual areas included in the zone, and at least a commercial power source that is shared in the zone
  • the power distribution board is equipped with a shared power source equipped with a storage battery that stores the power from Select the power to be supplied to the individual area from the commercial power supply or shared power supply according to the instruction from the control device.
  • the control device instructs the distribution board to supply power from the shared power source to at least one individual area.
  • the power is distributed to a plurality of individual areas within the zone defined by the distribution board, and a shared power supply with a storage battery that stores the power from the commercial power supply is provided and measured by the zone power meter
  • a configuration is adopted in which power is supplied from a shared power supply to at least one individual area.
  • the distribution board is inserted into each of the first electric circuits that supply power to the individual areas from the commercial power supply, to the second electric circuits that supply power to the individual areas from the common power supply, and to each of the first electric circuits.
  • a first switch whose opening and closing is controlled by the control device, and a second switch which is inserted in each second electric circuit and whose opening and closing is controlled by the control device. Until the power consumption measured by the wattmeter reaches the specified value, all the first switches are closed and all the second switches are opened, and the remaining capacity of the storage battery is within an appropriate range. When the power consumption measured by the zone power meter reaches the specified value, the first switch corresponding to at least one individual area is opened and the individual area is supported. Close the second switch, It is desirable to supply power to the individual areas from a common power source.
  • an individual wattmeter that measures the amount of power used in each individual area is provided, and when the power consumption measured by the zone wattmeter reaches a specified value, the control device is remeasured by the individual wattmeter.
  • the shared power source has a power generation device that generates power using natural energy, a function for storing the power from the power generation device in the storage battery, and a charge / discharge circuit that discharges the power of the storage battery.
  • the controller connects to the storage battery if there is surplus power while the second switch is closed and power is supplied from the power generator to each individual area, and discharges from the storage battery if there is a shortage.
  • it is possible to adopt a configuration instructing the charge / discharge circuit.
  • control device When multiple levels are set for the unit price of electricity when purchasing power from a commercial power source, it is desirable for the control device to control the storage and discharge of electricity to the storage battery for each unit price of electricity. It is desirable for the control device to store the amount of power corresponding to the loss associated with charging / discharging of the storage battery in addition to the amount of power discharged from the storage battery during storage of the storage battery.
  • a zone power meter that measures the amount of power used in a specified zone
  • a distribution board that distributes power to a plurality of individual areas included in the zone
  • a shared power supply having a storage battery for storing power from at least a commercial power supply, and a control device for controlling storage in the storage battery and discharge from the storage battery according to the amount of power used measured by the zone power meter.
  • the control device supplies power from the shared power source to at least one individual area when the amount of power used measured by the zone power meter reaches a specified value.
  • a power supply method for distributing power so that the distribution board supplies power to the individual area from the shared power supply upon receiving an instruction from the control device. It is. Brief Description of Drawings
  • FIG. 1 is a block diagram illustrating an embodiment.
  • FIG. 2 is an operation explanatory diagram of the above. BEST MODE FOR CARRYING OUT THE INVENTION
  • an apartment house B having a plurality of dwelling units H as individual areas of the user is illustrated as a zone.
  • each office or tenant occupies each zone. It is also possible to create a zone that has multiple individual areas with independent power meters in each individual area, or a zone in a region such as a town with a detached house as an individual area.
  • apartment house B is provided with a shared power source 1 having a storage battery SC arranged in an electrical room or the like.
  • Shared power source 1 is shared in apartment house B.
  • the common power source 1 includes a photovoltaic power generation device PV installed on the roof of the apartment house B or the like. Therefore, the common power source 1 is provided with a power storage circuit 11 that charges the storage battery SC with a commercial power source supplied from the power system P n. Therefore, the charging circuit 11 has a function of performing AC-DC conversion.
  • the shared power source 1 is charged / discharged to charge the storage battery SC with the surplus of the power generated by the photovoltaic power generator PV and to use the power of the storage battery SC together with the output power of the photovoltaic power generator PV.
  • Circuit 1 2 is also provided. Furthermore, the shared power source 1 also includes a power conditioner 13 that converts the power of the photovoltaic power generation device PV and the storage battery SC into AC power. It is also possible to provide a power generation device that uses natural energy other than sunlight instead of the solar power generation device PV.
  • the power system P n of the commercial power supply is connected to the minute board 2 located in the manager room of the apartment house B. Distribution board 2 distributes the power supplied from power system P n and shared power supply 1 to each dwelling unit H.
  • the distribution board 2 includes a main breaker (not shown) and a plurality of branch breakers 21, and further performs grid interconnection between the shared power source 1 and the commercial power system P n.
  • Each branch breaker 21 provided in the distribution board 2 is connected to a branch line Lb for distributing power to each dwelling unit H, and power is supplied to each dwelling unit H through the branch line Lb.
  • Each dwelling unit H is provided with an individual wattmeter M 2, and a load L is connected through the individual wattmeter M 2.
  • a distribution board for housing units (not shown) is placed between the individual power meter M 2 and the load L, and the branch line L b from distribution board 2 is connected to the distribution board for housing units. Branches into multiple systems.
  • Distribution board 2 includes a zone power meter M 1 that collectively measures the amount of power used in apartment house B.
  • the zone power meter M1 will be described as being provided in the distribution board, but the zone power meter may be provided separately from the distribution board.
  • Zone power meter M1 is a bidirectional power source that measures both the amount of power supplied from distribution system Pn to distribution panel 2 and the amount of power that flows backward from distribution panel 2 to power system Pn. Has a measurement function.
  • the zone power meter M 1 is connected to the power grid P n as a surplus of the amount of power purchased from the power grid P n as a commercial power source and the power generated by the photovoltaic power generator PV installed in the apartment house B. Measure the amount of power to reverse flow.
  • the solar power generation device PV since the solar power generation device PV is not essential, the case where the solar power generation device PV is not provided will be described first, and then the case where the solar power generation device PV is added will be described. That is, the charging / discharging circuit 12 first focuses only on the function of discharging from the storage battery SC, and the power conditioner 13 focuses on only the function of converting the power of the storage battery SC into alternating current.
  • the charging / discharging circuit 12 first focuses only on the function of discharging from the storage battery SC, and the power conditioner 13 focuses on only the function of converting the power of the storage battery SC into alternating current.
  • the charging / discharging circuit 12 Inside distribution board 2, after the amount of power received from power system P n is measured by zone power meter M1, it is branched into a plurality of electric lines Lp1 that supply power to each dwelling unit H. Further, an electric circuit L p 3 from the zone power meter M 1 to the power storage circuit 11 is also provided. Each circuit L p 1
  • each electric circuit L p 2 for supplying electric power from the power conditioner 13 to each dwelling unit H are provided in the distribution board 2, and each electric circuit L p 2 is supplied from the control device 10.
  • a switch SW 2 that is controlled to open / close in response to the open / close signal is inserted.
  • the electric circuit p 1 that supplies power to each dwelling unit H from the power system P n and the electric circuit L p 2 that supplies power to each dwelling unit H from the common power source 1 are connected to the same dwelling unit H in common.
  • Each branch breaker 21 is inserted between the connection point of the electric circuits L p 1 and L p 2 and the dwelling unit H, respectively. Therefore, one ends of the switch SW1, the switch SW2, and the branch breaker 21 are connected to each other.
  • the control device 10 that controls the opening and closing of each switch SW1 and SW2 is divided into the power consumption measured by the zone power meter M1 and the power consumption at each dwelling unit H measured by the individual power meter M2. Based on this, the switching of the switches SW1 and SW2 is controlled.
  • the control device 10 also controls the operation of the power storage circuit 11, the charge / discharge circuit 12 and the power conditioner 13.
  • the control device 10 communicates with the distribution board 2 and each dwelling unit H.
  • the control device 10 acquires the power consumption measured by the rezone power meter M 1 through communication with the distribution board 2 and controls the opening and closing of the switches SW1 and SW2, and individually communicates with the dwelling unit H. Obtain the amount of power used by the wattmeter M2.
  • the control device 10 also communicates with the power storage circuit 11, the charge / discharge circuit 12, and the power conditioner 13. That is, the control device 10 controls charging / discharging of the storage battery SC by communicating with the power storage circuit 11, the charge / discharge circuit 12, and the power conditioner 13.
  • the communication line between the control unit 1 0, the common power source 1 and the distribution board 2 is a communication line dedicated to communication. Use L s.
  • a local communication network used for communication such as an intercom is constructed, it is also possible to use the local communication network for communication between the control device 10 and each dwelling unit H.
  • the control device 10 uses the amount of power used acquired from the zone power meter M1 and the amount of power used acquired from the individual power meter M2 in controlling the opening and closing of the switches SW1 and SW2. These power consumptions are acquired by the control device 10 every unit period (for example, an appropriate period such as 5 minutes, 10 minutes, 30 minutes, etc.).
  • the unit price of the electricity charge for commercial power is set based on the maximum contracted power based on the maximum demand power in one month, with the average power consumption every 30 minutes as demand power. Electricity unit price is set. Therefore, in apartment house B, it is desirable to suppress the maximum value of power demand measured by zone power meter M1.
  • the control device 10 calculates demand power by obtaining the power consumption measured by the zone power meter M 1 (if power consumption every 30 minutes is obtained, power consumption The amount of power can be used as a value proportional to the demand power), and the switch SW 1 and SW 2 are controlled so that the demand power does not exceed the specified value (appropriate power value set lower than the contract power). is doing.
  • the specified value appropriate power value set lower than the contract power.
  • the control device 10 is fully open / closed so that power is supplied from commercial power to all units H until the power consumption measured by the zone power meter M1 reaches the specified value.
  • Switch SW 1 is closed (ON).
  • all switches SW 2 are opened (off).
  • the storage circuit 11 1 stores the storage battery SC from the commercial power supply until the remaining capacity of the storage battery SC reaches the upper limit of the appropriate range, and stops storing when the remaining capacity falls within the appropriate range.
  • the switch SW1 is closed, power is supplied from the commercial power source to each dwelling unit H through the electric circuit Lp1 and the branch line Lb. Further, during at least a part of this period, power is stored from the commercial power source to the storage battery SC through the power storage circuit 11.
  • the switch SW1 corresponding to at least one dwelling unit H is opened. Then cut off the power supply from the commercial power source to the unit H. At this time, by closing the switch SW 2 corresponding to the dwelling unit H, the charge / discharge circuit 12 and the conditioner 13 are operated to supply power from the common power source 1 to the dwelling unit H. In order to stop charging the storage battery SC, the storage circuit 11 is stopped.
  • the dwelling units H that supply power from the shared power source 1 can be all dwelling units H of the apartment house B, but the power capacity of the storage battery SC is limited. Therefore, in order to reduce the discharge from the storage battery SC as much as possible while keeping the power consumption used in the apartment B from exceeding the specified value, the one with the larger power consumption measured by the individual power meter M2 is used. By selecting dwelling unit H in order, the power consumption measured by zone power meter M1 is kept below the specified value.
  • the unit H that satisfies this condition is selected according to the following procedure. First, it is measured by individual wattmeter M 2 Arrange the used electric energy in descending order, and calculate the added value in order from the highest used electric energy. In other words, the added value of the used electric energy from the first place and the second place, the added value of the used electric energy from the first place to the third place, the added value of the used electric energy from the first place to the fourth place, etc. Then, the addition value is obtained in order. Among these added values, when subtracting from the sum of the power consumption of each dwelling unit H measured by the individual wattmeter M2, an added value that results in a subtraction result equal to or less than the specified value is obtained, and the added value is obtained. Select dwelling unit H.
  • each dwelling unit H By supplying power from the common power source 1 to the selected dwelling unit H without supplying power from the commercial power source, the power demand for the apartment house B as a whole will be reduced to less than the contracted power. .
  • each dwelling unit H is supplied with the required power from either the commercial power source or the shared power source 1. In other words, it is possible to prevent the demand power from exceeding the contract power while satisfying the power demand.
  • the storage battery SC of the common power source 1 is charged using the power of the commercial power source.
  • the electric power supplied from the common power source 1 to the dwelling unit H is stored in the storage battery SC during a period in which no electric power is supplied from the common power source 1 to the dwelling unit H.
  • the remaining capacity of the storage battery SC is monitored by the control device 10, and the control device 10 controls charging / discharging so that the remaining capacity associated with charging / discharging of the storage battery SC is maintained in an appropriate range.
  • Table 1 shows a summary of the control by the control device 10. Table 1 shows the operation for the case where the power demand of the entire apartment house B is higher and lower than the specified value.
  • each dwelling unit H is supplied with power from a commercial power source, and the storage battery SC is charged at least during this period.
  • the power demand is high, power is supplied from the storage battery SC to the high power demand dwelling unit H selected as described above, and from the commercial power supply to the low power demand dwelling unit H. Electric power will be supplied.
  • the total electricity demand for Apartment B includes the amount of power used in the common part of the apartment (including shared power supply 1) in addition to the amount of electricity used in each unit H.
  • the total amount of power used measured by M 2 does not correspond to the demand power.
  • the power consumption measured by the zone power meter M1 corresponds to the power purchased from the commercial power source. Demand does not necessarily correspond.
  • control device 10 if the change in power demand in the apartment B is known, the switching control of the switches SW 1 and SW 2, the operation of the storage circuit 1 1, the charge / discharge circuit 1 2, and the power conditioner 1 3 Since control is possible, in this embodiment, when the power of the storage battery SC is not used, the power consumption measured by the zone power meter M1 is used as a guideline for demand power.
  • the demand power is low (the switch SW 1 is on).
  • the demand power is shifted to a low state. That is, by giving hysteresis to the operations of the switches S W 1 and S W 2, hunting of the switches S W 1 and S W 2 is prevented.
  • the power supplied from the storage battery SC to the dwelling unit H during the period when the purchase of power from the commercial power supply is suppressed is purchased from the commercial power supply and charged to the storage battery SC during the period when the demand power of the apartment house B decreases. become.
  • the dwelling unit H that receives power supply from the shared power source 1 purchases the electric power from the commercial power source.
  • the individual power meter M 2 installed in each dwelling unit H accumulates the amount of power used regardless of whether or not the power supply from the shared power source 1 is received, and charges for the electricity according to the amount of power used. become.
  • the power purchased by the residential complex B from the commercial power source does not exceed the contracted power. As a result, the increase in electricity charges is restrained.
  • the power purchased from commercial power supply is reduced by supplying power to dwelling unit H in combination with shared power supply 1, and the power demand in apartment B decreases.
  • the electric power purchased from the commercial power source is increased by charging the storage battery sc of the common power source 1. This operation will equalize the power purchased from commercial power sources.
  • Figure 2 (a) shows the relationship between the actual power demand in the apartment house B (solid line) and the purchased power from the commercial power source using the storage battery SC (broken line).
  • the amount of power indicated by a broken line corresponds to the amount of power used by the zone power meter M1, and can be regarded as demand power if the power of the storage battery SC is not used.
  • the power of the storage battery SC when the power of the storage battery SC is not used, when the demand power (that is, the power corresponding to the power consumption measured by the zone power meter M 1) reaches the specified value Th 1, Fig. 2 (b) As shown, the discharge of the storage battery SC is started and the purchased power decreases as shown by the broken line. In this way, the power purchased from the power system P n can be prevented from reaching the contract power.
  • the storage battery SC is discharged when the demand power exceeds the specified value Th 1 (the charge / discharge circuit 12 operates), and then the demand power falls below the return value Th 2 Then, the discharge is stopped (charge / discharge circuit 12 stops), and the battery is stored until the remaining capacity falls within the proper range due to the operation of the storage circuit 11 after the discharge stops.
  • the above operation focuses on the leveling of the power purchased from the commercial power source.
  • the power is used at the time when the power is purchased from the commercial power source and at each unit H. It is also possible to shift the time zone. Therefore, if the unit price of the electricity rate changes according to the time zone, the electricity is stored in the storage battery SC in the time zone where the unit price of the electricity rate is low, and stored in the time zone where the unit price of the electricity rate is high.
  • the battery sc may be discharged.
  • the power conditioner 1 3 can be connected to the grid Pn of the commercial power source. While power is supplied to unit H by PV, grid connection is not normally performed, and the measurement of power consumption by individual power meter M2 is also stopped.
  • the storage circuit 1 1 and the storage battery SC Provide a means to measure the amount of power supplied, and grasp the amount of power stored by the power of the commercial power source, or store the power of the commercial power source as a storage battery SC, and the power of the photovoltaic power generator PV Are provided separately from those that store electricity.
  • the storage battery SC is divided so that the power of the commercial power supply and the photovoltaic power generator PV are stored separately, the origin of the power used for storage can be clearly distinguished for each storage battery SC. .
  • the storage battery SC that stores only the power generated by the PV generator PV can be used as the power source. Therefore, the inconvenience of reverse power flow to the commercial power supply using the power stored in the storage battery SC can be avoided.
  • the power of the storage battery SC is supplied to the dwelling unit H where the power consumption is high.
  • each dwelling unit H defines the standard amount of power for each dwelling unit H based on the actual amount of power used, and if the demand power of the apartment house B exceeds the specified value, You may make it supply the electric power of storage battery SC in an order from the dwelling unit H with the largest value which subtracted the reference electric energy from the electric energy used.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

Système d'alimentation électrique comprenant: panneau de distribution avec compteur de zone donnant une valeur de puissance utilisée dans une zone préétablie, et distribuant la puissance à plusieurs portions individuelles de la zone; réseau commun à cellule de stockage de puissance issue d'au moins une source commerciale pour utilisation commune dans la zone; et contrôleur de puissance dans la cellule et de libération de puissance depuis elle selon la valeur de puissance utilisée telle que mesurée par le compteur de zone. Le panneau de distribution distribue la puissance depuis le réseau commercial ou le réseau commun selon les commandes du contrôleur pour alimenter les portions individuelles. Lorsque la puissance utilisée telle que mesurée par le compteur de zone atteint une valeur préétablie, le contrôleur demande au panneau de distribution d'alimenter au moins une portion individuelle de zone depuis le réseau. commun
PCT/IB2010/003300 2009-12-21 2010-12-20 Système d'alimentation électrique Ceased WO2011077219A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009-289709 2009-12-21
JP2009289709A JP2011130649A (ja) 2009-12-21 2009-12-21 電力供給システム

Publications (2)

Publication Number Publication Date
WO2011077219A2 true WO2011077219A2 (fr) 2011-06-30
WO2011077219A3 WO2011077219A3 (fr) 2011-09-29

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WO (1) WO2011077219A2 (fr)

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JP6971196B2 (ja) * 2018-05-21 2021-11-24 関西電力株式会社 電力システムおよび切替装置
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JP7804824B1 (ja) 2025-09-11 2026-01-22 国際航業株式会社 電力供給システム、電力量計、及び情報処理装置

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