WO2020149099A1 - Power feed system - Google Patents

Power feed system Download PDF

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Publication number
WO2020149099A1
WO2020149099A1 PCT/JP2019/049940 JP2019049940W WO2020149099A1 WO 2020149099 A1 WO2020149099 A1 WO 2020149099A1 JP 2019049940 W JP2019049940 W JP 2019049940W WO 2020149099 A1 WO2020149099 A1 WO 2020149099A1
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WO
WIPO (PCT)
Prior art keywords
power
unit time
control unit
chargers
power amount
Prior art date
Application number
PCT/JP2019/049940
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French (fr)
Japanese (ja)
Inventor
泰城 岩田
Original Assignee
株式会社豊田自動織機
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Publication of WO2020149099A1 publication Critical patent/WO2020149099A1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
    • G06Q50/06—Electricity, gas or water supply
    • 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
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • 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
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • 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
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage

Definitions

  • the present disclosure relates to a power supply system.
  • the system measures the power consumption by the electric equipment other than the charger and also the power consumption by each charger. Then, the system determines the power allocated to the charger based on the power consumption by other chargers and electric equipment other than the charger, and the conversion efficiency of the AC/DC converter. The charger receives the notification of the allocated power and determines the charging current supplied to the secondary battery connected to the charger within a range not exceeding the allocated power.
  • the purpose of the present disclosure is to provide a power supply system capable of calculating a charging power instruction value in a range where the power consumption does not exceed the contracted power.
  • a power supply system for solving the above problems includes a power amount acquisition unit that acquires the amount of power supplied from a power system, and a plurality of units connected to the power system for charging a vehicle equipped with a storage battery. And a device other than the plurality of chargers connected to the power system, the power supply system having a charge controller for controlling charge power to the plurality of chargers, the charge controller Is configured to calculate an allocated power amount per control unit time from a control unit time that divides the unit time with respect to the contracted power per unit time, and an integrated power amount per control unit time by the power amount acquisition unit.
  • the amount of power per unit control time to the devices other than the plurality of chargers is configured to calculate the amount of power per unit control time to the devices other than the plurality of chargers from the total charging amount of power per unit control time to the plurality of chargers, further, It is configured to calculate the total chargeable power amount per control unit time from the power amount per control unit time to the devices other than the assigned power amount and the plurality of chargers, based on the total chargeable power amount, It is configured to determine a charging power instruction value to the plurality of chargers in a control unit time from the present time.
  • the block diagram which shows the electric power feeding system which concerns on 1st Embodiment. 6 is a flowchart for explaining the operation of the first embodiment.
  • the figure which shows the transition of electric power. The flowchart for demonstrating the effect
  • the figure which shows the transition of electric power. The figure which shows the transition of the integrated electric energy reading value and charger electric energy within the range of contract electric power.
  • the power supply system 10 is implemented as a charging stand capable of charging a plurality of electric forklifts (vehicles indicated by reference numerals 60 and 70 in the figure) in a factory. ..
  • the power supply system 10 includes a plurality of chargers 30 and 31 and a device 40 other than the plurality of chargers.
  • the charger 30 is connected to the electric power system and is for charging the vehicle 60 equipped with the storage battery 61.
  • the charger 31 is connected to the electric power system and charges the vehicle 70 equipped with the storage battery 71.
  • the devices 40 other than the plurality of chargers are connected to the power system.
  • Electric power of the power system is sent to the plurality of chargers 30, 31 and the device 40 other than the plurality of chargers via the relay device 21.
  • the relay device 21 includes a cubicle and a distribution board.
  • the relay device 21 and the plurality of chargers 30 and 31 are connected by a power supply line L10, and the electric power of the power system is sent to the plurality of chargers 30 and 31 via the power supply line L10 to be used for charging the storage battery of the vehicle.
  • the relay device 21 and the devices 40 other than the plurality of chargers are connected by a power supply line L11, and the power of the power system is sent to the devices 40 other than the plurality of chargers via the power supply line L11. It is used for driving 40.
  • the electric power meter 20 of the electric power company measures the amount of electric power sent from the electric power system to the relay device 21.
  • the power supply system 10 includes a power meter 22 and a charging controller 50 configured to control charging power for the plurality of chargers 30 and 31.
  • the charge controller 50 includes a central processing unit (not shown) and a memory (not shown) in which control programs and data are stored.
  • the measurement result of the integrated electric energy is sent from the electric energy meter 20 to the electric energy measuring device 22 by a pulse.
  • the electric energy measuring device 22 as the electric energy acquisition unit measures the electric energy Pk supplied from the electric power system, that is, the integrated electric energy (system) Pk. That is, the power amount measuring device 22 is configured to obtain the power amount Pk supplied from the power system.
  • Electric power amount Pk per unit time is sent from the electric energy measuring device 22 to the charging controller 50.
  • Contract power information is sent to the charging controller 50, and the charging controller 50 acquires the contract power (quantity) Pc.
  • the charge controller 50 and the chargers 30 and 31 are communicatively connected by a communication line L20. Charging power information is sent from the chargers 30 and 31 to the charging controller 50 via the communication line L20, and the charging controller 50 acquires the charging power information from the chargers 30 and 31.
  • the charging controller 50 sends the charging power instruction value to each of the chargers 30 and 31 via the communication line L20. For example, when the device 40 other than the plurality of chargers needs a large amount of power, the charging power by the plurality of chargers 30 and 31 is reduced so that the power consumption does not exceed the contracted power.
  • Each of the chargers 30 and 31 charges the storage batteries 61 and 71 of the vehicles 60 and 70 according to the charging power instruction value from the charging controller 50.
  • the horizontal axis indicates time and the vertical axis indicates electric energy.
  • the current time is represented as “current”.
  • the time before the control unit time Tc from the current time is represented as "-Tc”.
  • the time that is twice the control unit time Tc before the current time is represented as "-2Tc”.
  • the time that is three times the control unit time Tc before the current time is represented as "-3Tc”.
  • the time after the control unit time Tc with respect to the current time is represented as "Tc”.
  • the allocated power amount per control unit time is represented by “Pct”.
  • Pct On the vertical axis of FIG.
  • the power amount per control unit time to the devices 40 other than the plurality of chargers is represented by “Pot”. Further, the total amount of electric power charged to the plurality of chargers 30 and 31 per control unit time is represented by “Pjt”. The total chargeable electric energy per control unit time is represented by "Pjat”. The integrated electric energy (system) per control unit time by the electric energy measuring device 22 is represented by “Pkt”.
  • the charge controller 50 executes the process shown in FIG.
  • the contract power Pc per unit time Tpc is, for example, 3000 kWh/60 minutes.
  • the control unit time Tc that divides the unit time Tpc is, for example, 1 minute. That is, for example, for the contracted power Pc per unit time Tpc, the control unit time Tc divides the unit time Tpc into 60.
  • step S100 the charging controller 50 controls the contracted power Pc per unit time, the integrated power amount (system) Pk, and the total amount of charged power per unit time for controlling the plurality of chargers 30 and 31. Get Pjt.
  • step S101 the charging controller 50 allocates the control unit time Tc from the control unit time Tc that divides the unit time Tpc of the contracted power Pc per unit time Tpc, as shown in FIG.
  • the power amount Pct is calculated by the following formula.
  • Pct Pc/(60 ⁇ Tc) That is, it is assumed that 3000 kWh in FIG. 4 is divided evenly and 50 kWh can be consumed per minute which is the control unit time Tc. This is the ideal power usage line L100 in FIG. Although the Tc value is exemplified as 1 minute, it may be 0.5 minute or 2 minutes.
  • step S102 of FIG. 2 the charging controller 50, as shown in FIG. 3, the integrated electric energy Pkt per control unit time by the electric energy measuring device 22 and the total per control unit time to the plurality of chargers 30 and 31. From the charging power amount Pjt, the power amount Pot per control unit time to the devices 40 other than the plurality of chargers is calculated by the following formula.
  • Pot Pkt-Pjt
  • Pjt the total power amount (total charge power amount) to the plurality of chargers 30 and 31.
  • step S103 the charging controller 50 determines, as shown in FIG. 3, the allocated electric power amount Pct per control unit time and the electric power amount Pot per control unit time to the devices 40 other than the plurality of chargers per control unit time.
  • the total chargeable electric energy Pjat is calculated by the following formula.
  • step S104 of FIG. 2 the charging controller 50, based on the total chargeable power amount Pjat per control unit time, supplies a plurality of charging power instruction values to the chargers 30 and 31 from the present time to a plurality of control unit times.
  • the charging power instruction value for the chargers 30 and 31 is determined. That is, the total rechargeable power amount before the control unit time Tc from the present time is set as the total rechargeable power amount for the control unit time Tc.
  • the initial value of the total rechargeable power amount Pjat per control unit time is a fixed value.
  • the integrated power measured by the watt-hour meter 20 is the total of the power used by the device 40 other than the charger and the power used by the chargers 30, 31. Includes charger power. Therefore, it is necessary to grasp the available power.
  • the value of Pjat can be calculated even if the charger power amount is also included in the integrated power amount, and the available power for charging can be grasped.
  • step S105 of FIG. 2 the charging controller 50 outputs the charging power instruction value to the plurality of chargers 30 and 31.
  • each of the chargers 30 and 31 charges the vehicle equipped with the storage battery for, for example, Pjat/2 minutes per unit. That is, charging is performed within the range of the charging power instruction value.
  • the power supply system 10 is connected to the power system and is equipped with storage batteries 61 and 71, and a power amount measuring device 22 as a power amount acquisition unit configured to acquire the amount of power supplied from the power system. It has a plurality of chargers 30 and 31 configured to charge vehicles 60 and 70, and a device 40 other than the plurality of chargers configured to be connected to a power system.
  • the power feeding system 10 includes a charging controller 50 configured to control charging power for the plurality of chargers 30 and 31.
  • the charging controller 50 performs a plurality of chargings based on an integrated power amount Pkt per control unit time by the power amount measuring device 22 as a power amount acquisition unit and a total charging power amount Pjt per control unit time to the plurality of chargers 30 and 31.
  • the charge controller 50 is configured to determine a charge power instruction value for the plurality of chargers 30 and 31 in the control unit time from the present time, based on the total chargeable power amount Pjat. Therefore, it is possible to calculate the charging power instruction value in a range where the power consumption does not exceed the contracted power.
  • the difference between the instructed total charging power amount and the actually used total charging power amount is defined as the error power amount Pgt, and the error is generated at the next Tc (for example, 1 minute).
  • the total charging power amount is instructed in consideration of the power amount Pgt, that is, in addition.
  • step S200 the charge controller 50 determines the error power per control unit time from the allocated power amount Pct per control unit time and the integrated power amount Pkt per control unit time as shown in FIG.
  • the amount Pgt is calculated by the following formula.
  • step S201 of FIG. 5 the charge controller 50 adds the error power amount Pgt when calculating the total rechargeable power amount Pjat per control unit time. That is, when there is the error power amount Pgt, it is added when the next total chargeable power amount is calculated.
  • the charging controller 50 determines in step S202 of FIG. 5 whether or not the unit time Tpc of the contracted power per unit time has elapsed.
  • the charging controller 50 resets the error power amount Pgt added in step S203 when the unit time Tpc of the contract power per unit time has elapsed.
  • the charge controller 50 sets a predetermined set value (fixed value) as the total rechargeable power amount Pjat for the first time after the reset or the total rechargeable power amount immediately before the reset.
  • step S104 of FIG. 5 the charge controller 50 starts the control unit time from the present time to give the charge power instruction value to each of the chargers 30 and 31 based on the total chargeable power amount Pjat (Pjagt) per control unit time.
  • the charging power instruction value for the plurality of chargers 30 and 31 is determined.
  • step S105 of FIG. 5 the charging controller 50 outputs the charging power instruction value to the plurality of chargers 30 and 31. According to this instruction, the plurality of chargers 30 and 31 charge the vehicles 60 and 70 equipped with the storage batteries 61 and 71. That is, charging is performed within the range of the charging power instruction value.
  • the electric power used for charging does not exceed the contracted electric power, and the electric power used for charging tends to differ from the ideal electric power usage line L100.
  • the total chargeable power amount Pjat(Pjagt) is determined in consideration of the error power amount Pgt so that the contracted power is not exceeded and the power to be charged with time is reduced. Can be large.
  • the error power amount Pgt is configured to be added when the total chargeable power amount Pjat is calculated, and the error power amount added when the unit time Tpc of the contract power Pc per unit time Tpc has elapsed is reset. Is composed of. Therefore, it is possible to calculate the charging power instruction value in a range that does not exceed the contracted power so as to be closer to the contracted power.
  • the charge controller 50 is configured to set a predetermined set value as the total rechargeable electric energy Pjat for the first time after the reset or the total rechargeable electric energy immediately before the reset. Therefore, the charge controller 50 of the second embodiment is practical.
  • the embodiment is not limited to the above, and may be embodied as follows, for example.
  • the electric energy of the electric power system was acquired from the electric energy meter by using the electric energy measuring device 22 as the electric energy acquisition unit that acquires the amount of electric power supplied from the electric power system.
  • the amount of electric power may be acquired by calculating the acquired instantaneous electric power.
  • the vehicle equipped with the storage battery may be any electric industrial vehicle other than the electric forklift truck, or an electric vehicle (passenger vehicle) other than the industrial vehicle.
  • the charging controller 50 is not limited to one having a central processing unit and a memory and executing software processing.
  • a dedicated hardware circuit for example, ASIC
  • ASIC application-specific integrated circuit
  • the charging controller 50 may have any of the following configurations (a) to (c).
  • a processing device that executes all of the above processes according to a program, and a program storage device such as a ROM that stores the program.
  • B A processing device and a program storage device that execute a part of the above processes according to a program, and a dedicated hardware circuit that executes the remaining processes.
  • C A dedicated hardware circuit for executing all of the above processes is provided.

Abstract

A power feed system is provided with a charge controller. The charge controller calculates, from a control unit time dividing a unit time for contracted power per unit time, an allocated power amount per control unit time, calculates, from an integrated power amount per control unit time acquired by a power acquisition unit and a total charge power amount per control unit time to a plurality of chargers, a power amount per control unit time to an apparatus other than the plurality of chargers, calculates, from the allocated power amount per control unit time and the power amount per control unit time to the apparatus other than the plurality of chargers, a total charge-possible power amount per control unit time, and on the basis of the total charge-possible power amount, decides charge power instruction values to the plurality of chargers at the control unit time from a current time.

Description

給電システムPower supply system
　本開示は、給電システムに関するものである。 The present disclosure relates to a power supply system.
　特許文献１に開示の充電電力制御システムにおいては、複数の充電器が充電器以外の電気設備と同時に動作する環境において、該電気設備の使用電力を除いた残りの許容電力の範囲内で、複数の充電器による充電が効率よく行われる。そのために、該システムは、充電器以外の電気設備による消費電力を測定するとともに各々の充電器による消費電力を測定する。そして、該システムは、充電器への割当電力を、他の充電器および該充電器以外の電気設備による消費電力と、ＡＣ／ＤＣ変換部の変換効率とに基づいて決定する。充電器は、割当電力の通知を受けて、割当電力を超えない範囲で、該充電器に接続されている二次電池に供給される充電電流を決定する。 In the charging power control system disclosed in Patent Document 1, in an environment in which a plurality of chargers operate at the same time as electrical equipment other than the charger, within a range of the remaining allowable power excluding the power used by the electrical equipment, The charging by the battery charger is efficiently performed. Therefore, the system measures the power consumption by the electric equipment other than the charger and also the power consumption by each charger. Then, the system determines the power allocated to the charger based on the power consumption by other chargers and electric equipment other than the charger, and the conversion efficiency of the AC/DC converter. The charger receives the notification of the allocated power and determines the charging current supplied to the secondary battery connected to the charger within a range not exceeding the allocated power.
国際公開第２０１２／１１８１８４号International Publication No. 2012/118184
　ところで、電動車両を充電する充電器の電力を制御することで、消費電力が契約電力を超えないようにする場合、充電電力指示値の具体的な算出方法を確立する必要がある。 By the way, in order to prevent the power consumption from exceeding the contracted power by controlling the power of the charger that charges the electric vehicle, it is necessary to establish a concrete calculation method of the charging power instruction value.
　本開示の目的は、消費電力が契約電力を超えない範囲での充電電力指示値を算出することができる給電システムを提供することにある。 The purpose of the present disclosure is to provide a power supply system capable of calculating a charging power instruction value in a range where the power consumption does not exceed the contracted power.
　上記問題点を解決するための給電システムは、電力系統から供給される電力量を取得する電力量取得部と、前記電力系統に接続され、蓄電池を搭載した車両に対して充電を行うための複数の充電器と、前記電力系統に接続される前記複数の充電器以外の機器と、を有する給電システムであって、前記複数の充電器に対する充電電力を制御する充電コントローラを有し、前記充電コントローラは、単位時間当たりの契約電力についての前記単位時間を分割する制御単位時間から制御単位時間当たりの割当て電力量を算出するように構成され、前記電力量取得部による制御単位時間当たりの積算電力量及び前記複数の充電器への制御単位時間当たりの全充電電力量から複数の充電器以外の機器への制御単位時間当たりの電力量を算出するように構成され、さらに、前記制御単位時間当たりの割当て電力量及び前記複数の充電器以外の機器への制御単位時間当たりの電力量から制御単位時間当たりの全充電可能電力量を算出するように構成され、該全充電可能電力量に基づいて、現時点から制御単位時間における前記複数の充電器への充電電力指示値を決定するように構成される。 A power supply system for solving the above problems includes a power amount acquisition unit that acquires the amount of power supplied from a power system, and a plurality of units connected to the power system for charging a vehicle equipped with a storage battery. And a device other than the plurality of chargers connected to the power system, the power supply system having a charge controller for controlling charge power to the plurality of chargers, the charge controller Is configured to calculate an allocated power amount per control unit time from a control unit time that divides the unit time with respect to the contracted power per unit time, and an integrated power amount per control unit time by the power amount acquisition unit. And, is configured to calculate the amount of power per unit control time to the devices other than the plurality of chargers from the total charging amount of power per unit control time to the plurality of chargers, further, It is configured to calculate the total chargeable power amount per control unit time from the power amount per control unit time to the devices other than the assigned power amount and the plurality of chargers, based on the total chargeable power amount, It is configured to determine a charging power instruction value to the plurality of chargers in a control unit time from the present time.
第１の実施形態に係る給電システムを示すブロック図。The block diagram which shows the electric power feeding system which concerns on 1st Embodiment. 第１の実施形態の作用を説明するためのフローチャート。6 is a flowchart for explaining the operation of the first embodiment. 電力の推移を示す図。The figure which shows the transition of electric power. 電力の推移を示す図。The figure which shows the transition of electric power. 第２の実施形態の作用を説明するためのフローチャート。The flowchart for demonstrating the effect|action of 2nd Embodiment. 電力の推移を示す図。The figure which shows the transition of electric power. 電力の推移を示す図。The figure which shows the transition of electric power. 契約電力の範囲内での積算電力量読み値と充電器電力量の推移を示す図。The figure which shows the transition of the integrated electric energy reading value and charger electric energy within the range of contract electric power.
　（第１の実施形態）
　以下、一実施形態に係る給電システム１０を図面に従って説明する。 (First embodiment)
Hereinafter, a power supply system 10 according to an embodiment will be described with reference to the drawings.
　図１に示すように、給電システム１０は、工場内において複数台の電動フォークリフト（図中の符号６０，７０で示す車両）を充電することができる充電スタンドとして実施されることを想定している。給電システム１０は、複数の充電器３０，３１と、複数の充電器以外の機器４０と、を有する。充電器３０は、電力系統に接続され、蓄電池６１を搭載した車両６０に対して充電を行うためのものである。充電器３１は、電力系統に接続され、蓄電池７１を搭載した車両７０に対して充電を行うためのものである。複数の充電器以外の機器４０は、電力系統に接続される。 As shown in FIG. 1, it is assumed that the power supply system 10 is implemented as a charging stand capable of charging a plurality of electric forklifts (vehicles indicated by reference numerals 60 and 70 in the figure) in a factory. .. The power supply system 10 includes a plurality of chargers 30 and 31 and a device 40 other than the plurality of chargers. The charger 30 is connected to the electric power system and is for charging the vehicle 60 equipped with the storage battery 61. The charger 31 is connected to the electric power system and charges the vehicle 70 equipped with the storage battery 71. The devices 40 other than the plurality of chargers are connected to the power system.
　電力系統の電力が中継機器２１を介して複数の充電器３０，３１及び複数の充電器以外の機器４０に送られる。中継機器２１は、キュービクル、分電盤を含んでいる。中継機器２１と複数の充電器３０，３１とは電源線Ｌ１０により接続され、電力系統の電力が電源線Ｌ１０を経由して複数の充電器３０，３１に送られ、車両の蓄電池の充電に供される。また、中継機器２１と、複数の充電器以外の機器４０とは電源線Ｌ１１により接続され、電力系統の電力が電源線Ｌ１１を経由して複数の充電器以外の機器４０に送られ、該機器４０の駆動に供される。 Electric power of the power system is sent to the plurality of chargers 30, 31 and the device 40 other than the plurality of chargers via the relay device 21. The relay device 21 includes a cubicle and a distribution board. The relay device 21 and the plurality of chargers 30 and 31 are connected by a power supply line L10, and the electric power of the power system is sent to the plurality of chargers 30 and 31 via the power supply line L10 to be used for charging the storage battery of the vehicle. To be done. The relay device 21 and the devices 40 other than the plurality of chargers are connected by a power supply line L11, and the power of the power system is sent to the devices 40 other than the plurality of chargers via the power supply line L11. It is used for driving 40.
　電力会社の電力量計２０により電力系統から中継機器２１に送られる電力量が計測される。 The electric power meter 20 of the electric power company measures the amount of electric power sent from the electric power system to the relay device 21.
　給電システム１０は、電力量測定器２２と、複数の充電器３０，３１に対する充電電力を制御するように構成された充電コントローラ５０を有する。充電コントローラ５０は、中央処理装置（図示略）と、制御用のプログラムやデータが記憶されたメモリ（図示略）とを備えている。電力量計２０から電力量測定器２２にパルスにより積算電力量の計測結果が送られる。電力量取得部としての電力量測定器２２は、電力系統から供給される電力量Ｐｋ、即ち、積算電力量（系統）Ｐｋを計測する。即ち、電力量測定器２２は、電力系統から供給される電力量Ｐｋを取得するように構成されている。 The power supply system 10 includes a power meter 22 and a charging controller 50 configured to control charging power for the plurality of chargers 30 and 31. The charge controller 50 includes a central processing unit (not shown) and a memory (not shown) in which control programs and data are stored. The measurement result of the integrated electric energy is sent from the electric energy meter 20 to the electric energy measuring device 22 by a pulse. The electric energy measuring device 22 as the electric energy acquisition unit measures the electric energy Pk supplied from the electric power system, that is, the integrated electric energy (system) Pk. That is, the power amount measuring device 22 is configured to obtain the power amount Pk supplied from the power system.
　充電コントローラ５０には電力量測定器２２から単位時間当たりの電力量Ｐｋが送られる。充電コントローラ５０には契約電力情報が送られ、充電コントローラ５０は契約電力（量）Ｐｃを取得する。 Electric power amount Pk per unit time is sent from the electric energy measuring device 22 to the charging controller 50. Contract power information is sent to the charging controller 50, and the charging controller 50 acquires the contract power (quantity) Pc.
　充電コントローラ５０と各充電器３０，３１とは通信線Ｌ２０により通信可能に接続されている。通信線Ｌ２０を介して充電コントローラ５０に各充電器３０，３１から充電電力情報が送られ、充電コントローラ５０は各充電器３０，３１からの充電電力情報を取得する。通信線Ｌ２０を介して充電コントローラ５０は各充電器３０，３１に対し充電電力指示値を送る。例えば、複数の充電器以外の機器４０が多くの電力を必要としているときには、消費電力が契約電力を超えないように複数の充電器３０，３１による充電電力を減らすことになる。各充電器３０，３１は充電コントローラ５０からの充電電力指示値により車両６０，７０の蓄電池６１，７１に対し充電を行う。 The charge controller 50 and the chargers 30 and 31 are communicatively connected by a communication line L20. Charging power information is sent from the chargers 30 and 31 to the charging controller 50 via the communication line L20, and the charging controller 50 acquires the charging power information from the chargers 30 and 31. The charging controller 50 sends the charging power instruction value to each of the chargers 30 and 31 via the communication line L20. For example, when the device 40 other than the plurality of chargers needs a large amount of power, the charging power by the plurality of chargers 30 and 31 is reduced so that the power consumption does not exceed the contracted power. Each of the chargers 30 and 31 charges the storage batteries 61 and 71 of the vehicles 60 and 70 according to the charging power instruction value from the charging controller 50.
　次に、給電システム１０の作用について説明する。 Next, the operation of the power supply system 10 will be described.
　図３において横軸は時間を示し、縦軸は電力量を示している。図３の横軸において、現在の時刻が「現在」と表されている。現在の時刻から制御単位時間Ｔｃ前の時刻が「－Ｔｃ」と表されている。現在の時刻から２倍の制御単位時間Ｔｃ前の時刻が「－２Ｔｃ」と表されている。現在の時刻から３倍の制御単位時間Ｔｃ前の時刻が「－３Ｔｃ」と表されている。現在の時刻に対し制御単位時間Ｔｃ後の時刻が「Ｔｃ」と表されている。図３の縦軸において、制御単位時間当たりの割当て電力量が「Ｐｃｔ」で表されている。図３の縦軸において、複数の充電器以外の機器４０への制御単位時間当たりの電力量が「Ｐｏｔ」で表されている。また、複数の充電器３０，３１への制御単位時間当たりの全充電電力量が「Ｐｊｔ」で表されている。制御単位時間当たりの全充電可能電力量が「Ｐｊａｔ」で表されている。電力量測定器２２による制御単位時間当たりの積算電力量（系統）が「Ｐｋｔ」で表されている。 In Fig. 3, the horizontal axis indicates time and the vertical axis indicates electric energy. On the horizontal axis of FIG. 3, the current time is represented as “current”. The time before the control unit time Tc from the current time is represented as "-Tc". The time that is twice the control unit time Tc before the current time is represented as "-2Tc". The time that is three times the control unit time Tc before the current time is represented as "-3Tc". The time after the control unit time Tc with respect to the current time is represented as "Tc". On the vertical axis of FIG. 3, the allocated power amount per control unit time is represented by “Pct”. On the vertical axis of FIG. 3, the power amount per control unit time to the devices 40 other than the plurality of chargers is represented by “Pot”. Further, the total amount of electric power charged to the plurality of chargers 30 and 31 per control unit time is represented by “Pjt”. The total chargeable electric energy per control unit time is represented by "Pjat". The integrated electric energy (system) per control unit time by the electric energy measuring device 22 is represented by “Pkt”.
　充電コントローラ５０は、図２に示す処理を実行する。本実施形態においては、図４に示すように、単位時間Ｔｐｃ当たりの契約電力Ｐｃは、例えば３０００ｋＷｈ／６０分である。本実施形態においては、単位時間Ｔｐｃを分割する制御単位時間Ｔｃは、例えば１分である。つまり、例えば、単位時間Ｔｐｃ当たりの契約電力Ｐｃについて、制御単位時間Ｔｃは単位時間Ｔｐｃを６０分割する。 The charge controller 50 executes the process shown in FIG. In the present embodiment, as shown in FIG. 4, the contract power Pc per unit time Tpc is, for example, 3000 kWh/60 minutes. In the present embodiment, the control unit time Tc that divides the unit time Tpc is, for example, 1 minute. That is, for example, for the contracted power Pc per unit time Tpc, the control unit time Tc divides the unit time Tpc into 60.
　図２に示すように、充電コントローラ５０は、ステップＳ１００において、単位時間当たりの契約電力Ｐｃ、積算電力量（系統）Ｐｋ、複数の充電器３０，３１への制御単位時間当たりの全充電電力量Ｐｊｔを取得する。 As shown in FIG. 2, in step S100, the charging controller 50 controls the contracted power Pc per unit time, the integrated power amount (system) Pk, and the total amount of charged power per unit time for controlling the plurality of chargers 30 and 31. Get Pjt.
　図２に示すように、充電コントローラ５０は、ステップＳ１０１において、図３に示すように、単位時間Ｔｐｃ当たりの契約電力Ｐｃについての単位時間Ｔｐｃを分割する制御単位時間Ｔｃから制御単位時間当たりの割当て電力量Ｐｃｔを以下の式により算出する。 As shown in FIG. 2, in step S101, the charging controller 50 allocates the control unit time Tc from the control unit time Tc that divides the unit time Tpc of the contracted power Pc per unit time Tpc, as shown in FIG. The power amount Pct is calculated by the following formula.
　Ｐｃｔ＝Ｐｃ／（６０×Ｔｃ）
　即ち、図４での３０００ｋＷｈを均等に分割して制御単位時間Ｔｃである１分当たり５０ｋＷｈ消費できるものとする。これが図４での理想の電力使用ラインＬ１００となる。Ｔｃ値は１分を例示したが、０．５分でも、２分であっても構わない。 Pct=Pc/(60×Tc)
That is, it is assumed that 3000 kWh in FIG. 4 is divided evenly and 50 kWh can be consumed per minute which is the control unit time Tc. This is the ideal power usage line L100 in FIG. Although the Tc value is exemplified as 1 minute, it may be 0.5 minute or 2 minutes.
　充電コントローラ５０は、図２のステップＳ１０２において、図３に示すように、電力量測定器２２による制御単位時間当たりの積算電力量Ｐｋｔ及び複数の充電器３０，３１への制御単位時間当たりの全充電電力量Ｐｊｔから、複数の充電器以外の機器４０への制御単位時間当たりの電力量Ｐｏｔを以下の式により算出する。 In step S102 of FIG. 2, the charging controller 50, as shown in FIG. 3, the integrated electric energy Pkt per control unit time by the electric energy measuring device 22 and the total per control unit time to the plurality of chargers 30 and 31. From the charging power amount Pjt, the power amount Pot per control unit time to the devices 40 other than the plurality of chargers is calculated by the following formula.
　Ｐｏｔ＝Ｐｋｔ－Ｐｊｔ
　Ｐｊｔの値は複数の充電器３０，３１への合計の電力量（全充電電力量）である。 Pot=Pkt-Pjt
The value of Pjt is the total power amount (total charge power amount) to the plurality of chargers 30 and 31.
　充電コントローラ５０は、ステップＳ１０３において、図３に示すように、制御単位時間当たりの割当て電力量Ｐｃｔ及び複数の充電器以外の機器４０への制御単位時間当たりの電力量Ｐｏｔから制御単位時間当たりの全充電可能電力量Ｐｊａｔを以下の式により算出する。 In step S103, the charging controller 50 determines, as shown in FIG. 3, the allocated electric power amount Pct per control unit time and the electric power amount Pot per control unit time to the devices 40 other than the plurality of chargers per control unit time. The total chargeable electric energy Pjat is calculated by the following formula.
　Ｐｊａｔ＝Ｐｃｔ－Ｐｏｔ
　充電コントローラ５０は、図２のステップＳ１０４において、制御単位時間当たりの全充電可能電力量Ｐｊａｔに基づいて、各充電器３０，３１への充電電力指示値を与えるべく現時点から制御単位時間における複数の充電器３０，３１への充電電力指示値を決定する。即ち、現時点から制御単位時間Ｔｃ前の全充電可能電力量を、これから制御単位時間Ｔｃの全充電可能電力量とする。 Pjat=Pct-Pot
In step S104 of FIG. 2, the charging controller 50, based on the total chargeable power amount Pjat per control unit time, supplies a plurality of charging power instruction values to the chargers 30 and 31 from the present time to a plurality of control unit times. The charging power instruction value for the chargers 30 and 31 is determined. That is, the total rechargeable power amount before the control unit time Tc from the present time is set as the total rechargeable power amount for the control unit time Tc.
　なお、制御単位時間当たりの全充電可能電力量Ｐｊａｔの初期値は固定値としている。 Note that the initial value of the total rechargeable power amount Pjat per control unit time is a fixed value.
　図４に示す比較例においては、一定の充電割当て量を持たせ、充電量に一定のリミッタ機能を持たせた場合には契約電力を超えないようにしつつ時間とともに充電に供される電力は少ない。これに対し図４に示すように、第１の実施形態では契約電力を超えないようにしつつ時間とともに充電に供される電力を大きくすることができる。 In the comparative example shown in FIG. 4, when a fixed charge allocation amount is provided and the fixed charge amount has a fixed limiter function, the contracted power is not exceeded and the power supplied for charging is small over time. .. On the other hand, as shown in FIG. 4, in the first embodiment, it is possible to increase the electric power used for charging with time while preventing the contract electric power from being exceeded.
　従来、電動車両を充電する充電器の電力を制御することで、消費電力が契約電力を超えないようにする場合、充電電力指示値の具体的な算出方法を確立する必要がある。また、図８に示すように、電力量計２０で計測される積算電力は充電器以外の機器４０で使用される電力と充電器３０，３１で使用される電力の合計であり、積算電力量の中に充電器電力量も含まれる。そのため、利用可能な電力を把握する必要がある。本実施形態では、積算電力量の中に充電器電力量も含まれていてもＰｊａｔの値を算出でき、これにより利用可能な電力である充電に供する電力を把握することができる。 Conventionally, in order to prevent the power consumption from exceeding the contracted power by controlling the power of the charger that charges the electric vehicle, it is necessary to establish a concrete calculation method of the charging power instruction value. In addition, as shown in FIG. 8, the integrated power measured by the watt-hour meter 20 is the total of the power used by the device 40 other than the charger and the power used by the chargers 30, 31. Includes charger power. Therefore, it is necessary to grasp the available power. In the present embodiment, the value of Pjat can be calculated even if the charger power amount is also included in the integrated power amount, and the available power for charging can be grasped.
　図２のステップＳ１０５において充電コントローラ５０は複数の充電器３０，３１に対し充電電力指示値の出力を行う。この指示に従って各充電器３０，３１は、例えば１台当たりＰｊａｔ／２分だけ、蓄電池を搭載した車両に対して充電を行う。つまり、充電電力指示値の範囲内での充電が行われる。 In step S105 of FIG. 2, the charging controller 50 outputs the charging power instruction value to the plurality of chargers 30 and 31. According to this instruction, each of the chargers 30 and 31 charges the vehicle equipped with the storage battery for, for example, Pjat/2 minutes per unit. That is, charging is performed within the range of the charging power instruction value.
　第１の実施形態によれば、以下のような効果を得ることができる。 According to the first embodiment, the following effects can be obtained.
　（１）給電システム１０は、電力系統から供給される電力量を取得するように構成された電力量取得部としての電力量測定器２２と、電力系統に接続され、蓄電池６１，７１を搭載した車両６０，７０に対して充電を行うように構成された複数の充電器３０，３１と、電力系統に接続されるように構成された複数の充電器以外の機器４０と、を有する。給電システム１０は、複数の充電器３０，３１に対する充電電力を制御するように構成された充電コントローラ５０を有する。充電コントローラ５０は、単位時間Ｔｐｃ当たりの契約電力Ｐｃについての単位時間Ｔｐｃを分割する制御単位時間Ｔｃから制御単位時間当たりの割当て電力量Ｐｃｔ（＝Ｐｃ／６０×Ｔｃ）を算出するように構成されている。充電コントローラ５０は、電力量取得部としての電力量測定器２２による制御単位時間当たりの積算電力量Ｐｋｔ及び複数の充電器３０，３１への制御単位時間当たりの全充電電力量Ｐｊｔから複数の充電器以外の機器４０への制御単位時間当たりの電力量Ｐｏｔ（＝Ｐｋｔ－Ｐｊｔ）を算出するように構成されている。充電コントローラ５０は、制御単位時間当たりの割当て電力量Ｐｃｔ及び複数の充電器以外の機器４０への制御単位時間当たりの電力量Ｐｏｔから制御単位時間当たりの全充電可能電力量Ｐｊａｔ（＝Ｐｃｔ－Ｐｏｔ）を算出するように構成されている。そして、充電コントローラ５０は、該全充電可能電力量Ｐｊａｔに基づいて、現時点から制御単位時間における複数の充電器３０，３１への充電電力指示値を決定するように構成されている。よって、消費電力が契約電力を超えない範囲での充電電力指示値を算出することができる。 (1) The power supply system 10 is connected to the power system and is equipped with storage batteries 61 and 71, and a power amount measuring device 22 as a power amount acquisition unit configured to acquire the amount of power supplied from the power system. It has a plurality of chargers 30 and 31 configured to charge vehicles 60 and 70, and a device 40 other than the plurality of chargers configured to be connected to a power system. The power feeding system 10 includes a charging controller 50 configured to control charging power for the plurality of chargers 30 and 31. The charge controller 50 is configured to calculate the allocated power amount Pct (=Pc/60×Tc) per control unit time from the control unit time Tc that divides the unit time Tpc for the contract power Pc per unit time Tpc. ing. The charging controller 50 performs a plurality of chargings based on an integrated power amount Pkt per control unit time by the power amount measuring device 22 as a power amount acquisition unit and a total charging power amount Pjt per control unit time to the plurality of chargers 30 and 31. The power amount Pot (=Pkt-Pjt) per control unit time to the devices 40 other than the appliances is configured to be calculated. The charging controller 50 determines the total chargeable power amount Pjat (=Pct-Pot) per control unit time from the assigned power amount Pct per control unit time and the power amount Pot per control unit time to the devices 40 other than the plurality of chargers. ) Is calculated. Then, the charge controller 50 is configured to determine a charge power instruction value for the plurality of chargers 30 and 31 in the control unit time from the present time, based on the total chargeable power amount Pjat. Therefore, it is possible to calculate the charging power instruction value in a range where the power consumption does not exceed the contracted power.
　（第２の実施形態）
　次に、第２の実施形態を、第１の実施形態との相違点を中心に説明する。 (Second embodiment)
Next, the second embodiment will be described focusing on the differences from the first embodiment.
　第２の実施形態においては、第１の実施形態に比べ、以下のような機能が追加されている。 The following functions are added to the second embodiment as compared with the first embodiment.
　本実施形態では、図６に示すごとく、指示した全充電電力量と、実際に使用した全充電電力量との差を誤差電力量Ｐｇｔと定義して、次のＴｃ（例えば１分）において誤差電力量Ｐｇｔを加味して、即ち上乗せして全充電電力量が指示される。この誤差電力量、即ち、余剰電力を有効利用することにより第２の実施形態では図４に示すごとく理想の電力使用ラインＬ１００に近づけることが可能となる。 In the present embodiment, as shown in FIG. 6, the difference between the instructed total charging power amount and the actually used total charging power amount is defined as the error power amount Pgt, and the error is generated at the next Tc (for example, 1 minute). The total charging power amount is instructed in consideration of the power amount Pgt, that is, in addition. By effectively using this error power amount, that is, the surplus power, in the second embodiment, it is possible to approach the ideal power usage line L100 as shown in FIG.
　図１に代わり図５の処理が実行される。図５において、ステップＳ１００，Ｓ１０１，Ｓ１０２，Ｓ１０３の処理は、図１のステップＳ１００，Ｓ１０１，Ｓ１０２，Ｓ１０３の処理と同じである。本実施形態では誤差電力量Ｐｇｔ（図７参照）があった場合、次の全充電可能電力量の算出時に加算する、即ち上乗せすることになる。 The process of FIG. 5 is executed instead of that of FIG. 5, the processing of steps S100, S101, S102, and S103 is the same as the processing of steps S100, S101, S102, and S103 of FIG. In the present embodiment, when there is the error power amount Pgt (see FIG. 7), it is added, that is, added when calculating the next total chargeable power amount.
　図５に示すように、充電コントローラ５０は、ステップＳ２００において、図６に示すように、制御単位時間当たりの割当て電力量Ｐｃｔ及び制御単位時間当たりの積算電力量Ｐｋｔから制御単位時間当たりの誤差電力量Ｐｇｔを以下の式により算出する。 As shown in FIG. 5, in step S200, the charge controller 50 determines the error power per control unit time from the allocated power amount Pct per control unit time and the integrated power amount Pkt per control unit time as shown in FIG. The amount Pgt is calculated by the following formula.
　Ｐｇｔ＝Ｐｃｔ－Ｐｋｔ
　そして、充電コントローラ５０は、図５のステップＳ２０１において、制御単位時間当たりの全充電可能電力量Ｐｊａｔの算出時に誤差電力量Ｐｇｔを加算する。つまり、誤差電力量Ｐｇｔがあった場合、次の全充電可能電力量の算出時に加算する。 Pgt=Pct-Pkt
Then, in step S201 of FIG. 5, the charge controller 50 adds the error power amount Pgt when calculating the total rechargeable power amount Pjat per control unit time. That is, when there is the error power amount Pgt, it is added when the next total chargeable power amount is calculated.
　よって、図６に示すように誤差電力量を加算した合計の全充電可能電力量Ｐｊａｇｔは、制御単位時間当たりの割当て電力量Ｐｃｔと制御単位時間当たりの誤差電力量Ｐｇｔとの和に、複数の充電器以外の機器４０への制御単位時間当たりの電力量Ｐｏｔを減算したものとなる（Ｐｊａｇｔ＝Ｐｃｔ＋Ｐｇｔ－Ｐｏｃ）。 Therefore, as shown in FIG. 6, the total rechargeable power amount Pjagt obtained by adding the error power amounts is equal to the sum of the allocated power amount Pct per control unit time and the error power amount Pgt per control unit time. It is a value obtained by subtracting the electric power amount Pot per control unit time to the devices 40 other than the charger (Pjagt=Pct+Pgt-Poc).
　同様にして図７に示すように誤差電力量Ｐｇｔを加算していく。そして、充電コントローラ５０は、図５のステップＳ２０２で単位時間当たりの契約電力についての単位時間Ｔｐｃが経過したか否かを判定する。充電コントローラ５０は単位時間当たりの契約電力についての単位時間Ｔｐｃが経過するとステップＳ２０３で加算していた誤差電力量Ｐｇｔをリセットする。このとき、充電コントローラ５０は、リセット後の初回の全充電可能電力量Ｐｊａｔとして予め定めた設定値（固定値）またはリセット直前の全充電可能電力量を設定する。 Similarly, the error power amount Pgt is added as shown in FIG. Then, the charging controller 50 determines in step S202 of FIG. 5 whether or not the unit time Tpc of the contracted power per unit time has elapsed. The charging controller 50 resets the error power amount Pgt added in step S203 when the unit time Tpc of the contract power per unit time has elapsed. At this time, the charge controller 50 sets a predetermined set value (fixed value) as the total rechargeable power amount Pjat for the first time after the reset or the total rechargeable power amount immediately before the reset.
　充電コントローラ５０は、図５のステップＳ１０４において、制御単位時間当たりの全充電可能電力量Ｐｊａｔ（Ｐｊａｇｔ）に基づいて、各充電器３０，３１への充電電力指示値を与えるべく現時点から制御単位時間における複数の充電器３０，３１への充電電力指示値を決定する。図５のステップＳ１０５において充電コントローラ５０は複数の充電器３０，３１に対し充電電力指示値の出力を行う。この指示に従って複数の充電器３０，３１は蓄電池６１，７１を搭載した車両６０，７０に対して充電を行う。つまり、充電電力指示値の範囲内での充電が行われる。 In step S104 of FIG. 5, the charge controller 50 starts the control unit time from the present time to give the charge power instruction value to each of the chargers 30 and 31 based on the total chargeable power amount Pjat (Pjagt) per control unit time. The charging power instruction value for the plurality of chargers 30 and 31 is determined. In step S105 of FIG. 5, the charging controller 50 outputs the charging power instruction value to the plurality of chargers 30 and 31. According to this instruction, the plurality of chargers 30 and 31 charge the vehicles 60 and 70 equipped with the storage batteries 61 and 71. That is, charging is performed within the range of the charging power instruction value.
　これにより、図４に示すように、第１の実施形態では契約電力を超えないようにしつつ時間とともに充電に供される電力は理想の電力使用ラインＬ１００とは差が生じやすい。これに対して、第２の実施形態では誤差電力量Ｐｇｔを加味して全充電可能電力量Ｐｊａｔ（Ｐｊａｇｔ）を決定することにより契約電力を超えないようにしつつ時間とともに充電に供される電力を大きくすることができる。 As a result, as shown in FIG. 4, in the first embodiment, the electric power used for charging does not exceed the contracted electric power, and the electric power used for charging tends to differ from the ideal electric power usage line L100. On the other hand, in the second embodiment, the total chargeable power amount Pjat(Pjagt) is determined in consideration of the error power amount Pgt so that the contracted power is not exceeded and the power to be charged with time is reduced. Can be large.
　第２の実施形態によれば、前述の効果（１）に加え、以下のような効果を得ることができる。 According to the second embodiment, the following effect can be obtained in addition to the effect (1) described above.
　（２）充電コントローラ５０は、制御単位時間当たりの割当て電力量Ｐｃｔ及び制御単位時間当たりの積算電力量Ｐｋｔから制御単位時間当たりの誤差電力量Ｐｇｔ（＝Ｐｃｔ－Ｐｋｔ）を算出するように構成され、全充電可能電力量Ｐｊａｔの算出時に誤差電力量Ｐｇｔを加算するように構成され、単位時間Ｔｐｃ当たりの契約電力Ｐｃについての単位時間Ｔｐｃが経過した時に加算していた誤差電力量をリセットするように構成される。よって、契約電力を超えない範囲での充電電力指示値をより契約電力に近づけるように算出することができる。 (2) The charge controller 50 is configured to calculate the error power amount Pgt (=Pct−Pkt) per control unit time from the allocated power amount Pct per control unit time and the integrated power amount Pkt per control unit time. The error power amount Pgt is configured to be added when the total chargeable power amount Pjat is calculated, and the error power amount added when the unit time Tpc of the contract power Pc per unit time Tpc has elapsed is reset. Is composed of. Therefore, it is possible to calculate the charging power instruction value in a range that does not exceed the contracted power so as to be closer to the contracted power.
　（３）充電コントローラ５０は、リセット後の初回の全充電可能電力量Ｐｊａｔとして予め定めた設定値またはリセット直前の全充電可能電力量を設定するように構成される。そのため、第２実施形態の充電コントローラ５０は実用的である。 (3) The charge controller 50 is configured to set a predetermined set value as the total rechargeable electric energy Pjat for the first time after the reset or the total rechargeable electric energy immediately before the reset. Therefore, the charge controller 50 of the second embodiment is practical.
　実施形態は前記に限定されるものではなく、例えば、次のように具体化してもよい。 The embodiment is not limited to the above, and may be embodied as follows, for example.
　○　電力系統から供給される電力量を取得する電力量取得部として電力量測定器２２を用いて電力系統の電力量を電力量計から取得したが、これに限ることなく、例えば、電力計で取得した瞬時電力を演算して電力量を取得してもよい。 ○ The electric energy of the electric power system was acquired from the electric energy meter by using the electric energy measuring device 22 as the electric energy acquisition unit that acquires the amount of electric power supplied from the electric power system. However, the present invention is not limited to this. The amount of electric power may be acquired by calculating the acquired instantaneous electric power.
　○　充電器は複数あればよく、その台数は任意である。 ○ There should be multiple chargers, and the number of chargers is arbitrary.
　○　蓄電池を搭載した車両は、電動フォークリフト以外の任意の電動式産業車両であってもよいし、産業車両以外の電気自動車（乗用車）でもよい。 ○ The vehicle equipped with the storage battery may be any electric industrial vehicle other than the electric forklift truck, or an electric vehicle (passenger vehicle) other than the industrial vehicle.
　○　充電コントロータ５０としては、中央処理装置とメモリとを備えて、ソフトウェア処理を実行するものに限らない。たとえば、上記各実施形態においてソフトウェア処理されたものの少なくとも一部を、ハードウェア処理する専用のハードウェア回路（たとえばＡＳＩＣ等）を備えてもよい。すなわち、充電コントロータ５０は、以下の（ａ）～（ｃ）のいずれかの構成であればよい。（ａ）上記処理の全てを、プログラムに従って実行する処理装置と、プログラムを記憶するＲＯＭ等のプログラム格納装置とを備える。（ｂ）上記処理の一部をプログラムに従って実行する処理装置およびプログラム格納装置と、残りの処理を実行する専用のハードウェア回路とを備える。（ｃ）上記処理の全てを実行する専用のハードウェア回路を備える。ここで、処理装置およびプログラム格納装置を備えたソフトウェア処理回路や、専用のハードウェア回路は複数であってもよい。すなわち、上記処理は、１または複数のソフトウェア処理回路および１または複数の専用のハードウェア回路の少なくとも一方を備えた処理回路によって実行されればよい。 ○ The charging controller 50 is not limited to one having a central processing unit and a memory and executing software processing. For example, a dedicated hardware circuit (for example, ASIC) that performs hardware processing on at least a part of the software processed in each of the above embodiments may be provided. That is, the charging controller 50 may have any of the following configurations (a) to (c). (A) A processing device that executes all of the above processes according to a program, and a program storage device such as a ROM that stores the program. (B) A processing device and a program storage device that execute a part of the above processes according to a program, and a dedicated hardware circuit that executes the remaining processes. (C) A dedicated hardware circuit for executing all of the above processes is provided. Here, there may be a plurality of software processing circuits including a processing device and a program storage device, or dedicated hardware circuits. That is, the above processing may be executed by a processing circuit including at least one of one or a plurality of software processing circuits and one or a plurality of dedicated hardware circuits.

Claims (3)

  1. 　電力系統から供給される電力量を取得するように構成された電力量取得部と、
    　前記電力系統に接続され、蓄電池を搭載した車両に対して充電を行う複数の充電器と、
    　前記電力系統に接続されるように構成された前記複数の充電器以外の機器と、
    を有する給電システムであって、
    　前記複数の充電器に対する充電電力を制御するように構成された充電コントローラを有し、
    　前記充電コントローラは、
    　単位時間当たりの契約電力についての前記単位時間を分割する制御単位時間から制御単位時間当たりの割当て電力量を算出するように構成され、前記電力量取得部による制御単位時間当たりの積算電力量及び前記複数の充電器への制御単位時間当たりの全充電電力量から複数の充電器以外の機器への制御単位時間当たりの電力量を算出するように構成され、さらに、前記制御単位時間当たりの割当て電力量及び前記複数の充電器以外の機器への制御単位時間当たりの電力量から制御単位時間当たりの全充電可能電力量を算出するように構成され、該全充電可能電力量に基づいて、現時点から制御単位時間における前記複数の充電器への充電電力指示値を決定するように構成される、給電システム。     An electric energy acquisition unit configured to acquire the amount of electric power supplied from the electric power grid,
    A plurality of chargers connected to the power system and charging a vehicle equipped with a storage battery,
    A device other than the plurality of chargers configured to be connected to the power system,
    A power supply system having
    A charge controller configured to control charge power to the plurality of chargers,
    The charge controller is
    It is configured to calculate an allocated power amount per control unit time from a control unit time that divides the unit time with respect to the contracted power per unit time, and the integrated power amount per control unit time by the power amount acquisition unit and the It is configured to calculate the amount of power per unit of control time for devices other than the plurality of chargers from the total amount of charge power per unit of control for multiple chargers, and further, the allocated power per unit of control time. It is configured to calculate the total chargeable power amount per control unit time from the amount and the power amount per control unit time to devices other than the plurality of chargers, and based on the total chargeable power amount, from the present time A power supply system configured to determine a charging power instruction value for the plurality of chargers in a control unit time.
  2. 　前記充電コントローラは、
    　前記制御単位時間当たりの割当て電力量及び前記制御単位時間当たりの積算電力量から制御単位時間当たりの誤差電力量を算出するように構成され、前記全充電可能電力量の算出時に前記誤差電力量を加算するように構成され、前記単位時間当たりの契約電力についての前記単位時間が経過した時に前記加算していた誤差電力量をリセットするように構成される、請求項１に記載の給電システム。     The charge controller is
    It is configured to calculate an error power amount per control unit time from the allocated power amount per control unit time and the integrated power amount per control unit time, and the error power amount is calculated when the total rechargeable power amount is calculated. The power supply system according to claim 1, wherein the power supply system is configured to perform addition, and configured to reset the added error power amount when the unit time of the contract power per unit time has elapsed.
  3. 　前記充電コントローラは、
    　前記リセット後の初回の全充電可能電力量として予め定めた設定値またはリセット直前の全充電可能電力量を設定するように構成される、請求項２に記載の給電システム。     The charge controller is
    The power supply system according to claim 2, wherein the power supply system is configured to set a predetermined set value as the first total rechargeable power amount after the reset or a total rechargeable power amount immediately before the reset.
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