WO2020022182A1 - Dispositif de commande de puissance électrique et procédé de commande de puissance électrique - Google Patents

Dispositif de commande de puissance électrique et procédé de commande de puissance électrique Download PDF

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Publication number
WO2020022182A1
WO2020022182A1 PCT/JP2019/028279 JP2019028279W WO2020022182A1 WO 2020022182 A1 WO2020022182 A1 WO 2020022182A1 JP 2019028279 W JP2019028279 W JP 2019028279W WO 2020022182 A1 WO2020022182 A1 WO 2020022182A1
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Prior art keywords
power
power control
converter
amount
bidirectional
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PCT/JP2019/028279
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English (en)
Japanese (ja)
Inventor
直 森田
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ソニー株式会社
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Priority to JP2020532338A priority Critical patent/JP7380563B2/ja
Publication of WO2020022182A1 publication Critical patent/WO2020022182A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—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
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • 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
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers

Definitions

  • This disclosure relates to a power control device and a power control method.
  • Patent Literature 1 discloses a technology of a power supply system for appropriately storing and selling power to and from a storage battery through an AC power system.
  • the present disclosure proposes a new and improved power control device and power control method capable of appropriately performing power interchange through the AC power system while keeping the AC power system in a stable state.
  • a current control unit that controls an input / output current between the bidirectional AC / DC converter and an AC transmission line, and the power control instruction Based on the input and output of the bidirectional AC-DC converter, the power amount acquisition unit for acquiring the actual interchange power amount during the power interchange period, and the actual interchange power amount calculated by the power amount acquisition unit during the power interchange period And a notifying unit for notifying the power management device of the above information.
  • a current control unit that controls an input / output current between the bidirectional AC / DC converter and an AC transmission line, and the power control instruction.
  • a power amount acquisition unit that acquires the target power amount designated by the formula (1) and the actual interchange power amount input and output by the bidirectional AC / DC converter, and calculates a difference, the current control unit comprising:
  • a power control device is provided that controls input / output current to the bidirectional AC / DC converter based on a difference calculated by an acquisition unit.
  • the present disclosure according to a power control instruction from an external power management device, controlling the input / output current between the bidirectional AC / DC converter and the AC transmission line, and based on the power control instruction.
  • the bidirectional AC / DC converter has input and output, to obtain the actual interchange power amount during the power interchange period, and to notify the power management device of the information on the actual interchange power amount during the power interchange period, A power control method is provided.
  • the power control instruction from the external power management device controlling the input / output current between the bidirectional AC / DC converter and the AC transmission line, and specifying the power control instruction.
  • the obtained target power amount and the actual interchange power amount input and output by the bidirectional AC / DC converter are periodically acquired, a difference is calculated, and based on the difference, the bidirectional AC / DC converter And controlling the input / output current.
  • a new and improved power control device and power control method capable of appropriately performing power interchange through an AC power system while keeping the AC power system in a stable state Can be provided.
  • FIG. 1 is an explanatory diagram illustrating an example of an overall configuration of a power supply system according to an embodiment of the present disclosure.
  • FIG. 3 is an explanatory diagram illustrating a configuration example of a power supply system by extracting two bases. It is explanatory drawing which shows an example of a scenario.
  • FIG. 3 is an explanatory diagram illustrating a functional configuration example of the power control device according to the embodiment; 4 is a flowchart showing an operation example of the power management device according to the embodiment. 4 is a flowchart showing an operation example of the power control device according to the embodiment. 4 is a flowchart showing an operation example of the bidirectional DC / AC converter according to the embodiment.
  • FIG. 3 is an explanatory diagram illustrating a configuration example of a power supply system by extracting two bases. It is explanatory drawing which shows an example of a scenario.
  • FIG. 4 is an explanatory diagram showing an example of an operation sequence by the operation of the power supply system according to the embodiment.
  • FIG. 4 is an explanatory diagram showing an example of an operation sequence by the operation of the power supply system according to the embodiment.
  • FIG. 4 is an explanatory diagram showing an example of an operation sequence by the operation of the power supply system according to the embodiment. It is explanatory drawing which shows an example of a change of a target electric energy and an accumulated electric energy.
  • FIG. 14 is an explanatory diagram for describing effects of the embodiment.
  • FIG. 1 is an explanatory diagram illustrating an example of an overall configuration of a power supply system according to an embodiment of the present disclosure.
  • FIG. 1 is an explanatory diagram illustrating an example of an overall configuration of a power supply system according to an embodiment of the present disclosure.
  • FIG. 1 is an explanatory diagram illustrating an example of an overall configuration of a power supply system according to an embodiment of the present disclosure.
  • FIG. 1 is an explanatory diagram illustrating an example of an overall configuration of a power supply system according to an embodiment of the present disclosure.
  • an overall configuration example of the power supply system according to the embodiment of the present disclosure will be described with reference to FIG.
  • the power supply system is a system that enables power interchange between bases such as homes through the AC power system 1. Power interchange between the sites is controlled by a power management device (Power @ Management Center; also referred to as PMC) 10.
  • PMC Power @ Management Center
  • FIG. 1 shows three pole transformers 20a, 20b, and 20c. In the present embodiment, the power exchange between the bases under the same pole transformer is most effective, but the power interchange beyond the pole transformer is naturally also possible.
  • the power management apparatus 10 acquires the current value of the AC power system 1 measured by the AC power meter (AMR) 30 via the communication line COM.
  • AMR AC power meter
  • the bases at which power can be exchanged through the AC power system 1 are the bases A-1, A-3, B-1, and C-2.
  • the site A-1 includes a power control device (Power Control Device; also referred to as PCD) 100a, a bidirectional DC / AC converter (Power Conditioning System) (PCS) 200a, and an AC power meter. 300a, a power storage device 400a, and a solar power generation device 500a (in the following description, the power control device 100, the bidirectional DC / AC converter 200, the AC power meter 300, the power storage device 400, and the power storage device 400, respectively) Photovoltaic power generation device 500).
  • Power Control Device Power Control Device
  • PCS Power Conditioning System
  • the power control device 100a is a device that controls power interchange between the location A-1 and another location (for example, location A-3). For example, when the power stored in the power storage device 400a is decreasing and it is desired that the power be transferred to another site, the power control device 100a transmits the power to the power management device 10 through the communication line COM. Request for accommodation. When receiving the accommodation instruction from the power management apparatus 10, the power control apparatus 100 a controls the bidirectional DC / AC converter 200 a to receive the electric power through the AC power system 1.
  • the power control device 100a notifies the power management device 10 via the communication line COM that power is available.
  • the power control device 100 a controls the bidirectional DC / AC converter 200 a to supply power to the AC power system 1.
  • the power control device 100a acquires information on the amount of power that has actually been exchanged when electric power is exchanged with another site.
  • the power supplied by the AC power system 1 is not always constant in voltage, and as a result of fluctuations in voltage, it may not be possible to accommodate a planned power amount (scheduled power amount). Therefore, the power control device 100a acquires information on the amount of power actually used (actually provided power), and transmits information on the amount of available power to the power management device 10.
  • the power management apparatus 10 instructs that the power interchange for correcting the difference be performed between the sites.
  • the voltage of the AC power system 1 varies depending on the fluctuation of the load connected from the AC power meter and the amount of power generated by the photovoltaic power generator.
  • the power control device 100a does not use the voltage for calculating the control current of the bidirectional DC / AC converter 200a, but uses only the assumed reference voltage for calculating the control current.
  • the integrated power value of the AC wattmeter the effective power accumulated value calculated by multiplying the actual voltage and the actual current by the power factor is output, so the power control device 100a holds the accumulated power at the start of the interchange, , The accumulated value from the AC wattmeter at the end of the interchange is read, and the actually accommodated electric energy is calculated.
  • the bidirectional DC / AC converter 200a is a converter having a function of converting AC power into DC power and converting DC power into AC power.
  • the bidirectional DC / AC converter 200a operates under the control of the power control device 100a when power is exchanged with another site.
  • the bidirectional DC / AC converter 200a monitors the current value of the AC power and controls the input / output current using the monitored current value when the power is exchanged with another site.
  • the AC wattmeter 300a is a measuring device that measures the power supplied from the AC power system 1 to the base and the power output from the base to the AC power system 1 on the contrary.
  • the power control device 100a can obtain information on the actual amount of power by obtaining information from the AC power meter 300a.
  • the power unit of 1 kWH power of the power company is Cp
  • the price unit agreed between the two sides of the power transmission side and the power reception side is Ca
  • the reverse power flow on the power transmission side is provided in the interchange period Tx.
  • FIG. 2 is an explanatory diagram showing an example of the configuration of a power supply system by extracting two bases.
  • FIG. 2 shows two locations, a location A-1 and a location B-1.
  • the load 50a uses AC power
  • the load 50c uses DC power.
  • the load 50b and the AC generator 600 are shown at the site B-2.
  • the load 50b uses AC power.
  • the power control devices 100a and 100f respectively read scenarios that specify a power generation schedule of the power generation device (for example, the power generation schedule of the photovoltaic power generation device 500a), a power consumption schedule, a power sale price of power, a purchase price of power, and the like. Based on the scenario and the power storage amounts of the power storage devices 400a and 400f, the power management device 10 applies for power interchange.
  • a power generation schedule of the power generation device for example, the power generation schedule of the photovoltaic power generation device 500a
  • a power consumption schedule for example, a power consumption schedule, a power sale price of power, a purchase price of power, and the like.
  • the power management device 10 applies for power interchange.
  • FIG. 3 is an explanatory diagram showing an example of a scenario.
  • FIG. 3 shows, as scenarios, the time series power consumption at the base, the maximum power storage amount (MaxMSOC) and the minimum power storage amount (Min SOC) of the power storage device in time series.
  • the power control device 100a refers to this scenario, applies for power selling when the power amount of the power storage device 400a is considered to be excessive, and purchases power when the power amount of the power storage device 400a is considered to be insufficient. Apply.
  • the price (Grid price) when purchasing power from the power company through the AC power system 1 is high, the purchase from the power company is suppressed, and the time period when the Grid price is low is low. Is set to be purchased from a power company.
  • the power management device 10 calculates the amount of power that can be exchanged between the power control devices, and calculates an accommodation schedule synchronized with the available power pattern.
  • the accommodating power pattern is, for example, such that an electric power of 1.0 kWh is accommodated for 30 minutes.
  • the power control device 100a calculates the current control pattern of the bidirectional DC / AC converter 200a according to the power pattern received from the power management device 10 and the interchange schedule. From the given power pattern, the amount of current is calculated based on the reference voltage and the reference power factor of the AC power system 1 to which the bidirectional DC / AC converter 200a is connected. Therefore, when the reference voltage of the AC power system 1 is 200 V and when the reference voltage is 100 V, the amount of current of the bidirectional DC / AC converter 200 a is twice different.
  • the power control device 100a controls the current of the bidirectional DC / AC converter 200a according to the power pattern calculated by the power management device 10.
  • power interchange control is performed so that consumption of a load connected inside the ammeter ir1 is not included in the interchange power. Therefore, when there is no power interchange and the load is consuming power, the power control device 100a controls the bidirectional DC / AC converter 200a so that the ammeter ir1 always becomes 0A.
  • a site where the power control device is provided and a site where the power control device is not provided can be mixed. It is. In other words, the site where the power control device is provided can not only receive the power supply from the AC power system 1 but also exchange power with another site where the power control device is provided. is there. On the other hand, the site where the power control device is not provided receives only the power from the AC power system 1, but does not receive the power supply from the site where the power control device is provided. It does not affect the power supply from the base where the device is provided.
  • FIG. 4 is an explanatory diagram illustrating a functional configuration example of the power control device 100 according to the embodiment of the present disclosure.
  • a functional configuration example of the power control device 100 according to the embodiment of the present disclosure will be described using FIG.
  • the power control device 100 includes an accommodation pattern generation unit 110, a current control unit 120, a power amount acquisition unit 130, and a notification unit 140. Be composed.
  • the accommodation pattern generation unit 110 reads a scenario, acquires the amount of power storage (State Of h Charge; SOC) of the power storage device 400, and generates an electric power interchange pattern.
  • the generated accommodation pattern is sent to the power management apparatus 10 by the notification unit 140, for example.
  • the current control unit 120 controls the input / output current between the bidirectional DC / AC converter 200 and the AC power system 1 according to the power control instruction from the power management device 10.
  • the power amount acquisition unit 130 Based on the power control instruction from the power management device 10, the power amount acquisition unit 130 performs the actual accommodation during the power accommodation period input and output by the bidirectional DC / AC converter 200 and indicated by the power control instruction from the power management device 10. Obtain information on the amount of power. Specifically, the power amount acquisition unit 130 determines the power amount measured by the AC wattmeter 300a at the start time of the power interchange period, and the power amount measured by the AC wattmeter 300a at the end time of the power interchange period. To get.
  • the notification unit 140 executes a notification to the power management apparatus 10. For example, the notification unit 140 performs a process of notifying the power management apparatus 10 of the accommodation pattern generated by the accommodation pattern generation unit 110. Further, for example, the notification unit 140 performs a process of notifying the power management apparatus 10 of the information on the actual amount of power acquired by the power amount acquisition unit 130 during the power accommodation period. The notification unit 140 notifies the power management apparatus 10 of the information on the actual amount of power exchanged during the power exchange period, so that the power management apparatus 10 determines the difference between the scheduled amount of electric power exchanged during the power exchange period and the actual amount of exchanged electric power. The power interchange for the correction can be instructed to the power control apparatus 100 at the site where the power interchange was performed.
  • the power control apparatus 100 having such a configuration generates a power interchange pattern and notifies the power management apparatus 10 of the power interchange pattern, and also manages information on the actual interchange power amount during the power interchange period by power management.
  • the device 10 can be notified.
  • power control apparatus 100 temporarily changes the voltage of AC power system 1, and makes a difference between the scheduled amount of electric power and the actual amount of electric power at the time of electric power interchange. Occurs, it becomes easy to correct the difference in the power rate based on the difference in the amount of power when the power management apparatus 10 setstle the power rate.
  • the power management device 10 can grasp the information of the difference.
  • the power management apparatus 10 may reduce the price for the difference, and may instruct the power control apparatus 100 of the target base to re-apply the power for the difference later.
  • FIG. 5 is a flowchart illustrating an operation example of the power management apparatus 10 according to the embodiment of the present disclosure.
  • an operation example of the power management apparatus 10 according to the embodiment of the present disclosure will be described using FIG.
  • the power management apparatus 10 When the power management apparatus 10 starts operating, first, it determines whether or not there is a request for power accommodation from the power control apparatus 100 (step S101). The power management apparatus 10 waits until there is a request for power interchange from the power control apparatus 100 (step S101, No).
  • step S101 If there is a request for power accommodation from the power control apparatus 100 (step S101, Yes), it is determined whether or not the request matches the power accommodation request from another power control apparatus 100 (step S102).
  • the power interchange request from the power control device 100 includes information on the power supply available time, the minimum power, the maximum power, the power amount, and the price range.
  • the power management apparatus 10 determines whether or not the power management apparatus 100 conforms to a power interchange request from another power control apparatus 100.
  • the power company that supplies power to the AC power system 1 also Can be chosen as a partner for accommodation.
  • step S102 If the request does not match the request for power accommodation from another power control apparatus 100 (step S102, No), the power management apparatus 10 adds the acquired power accommodation request to the accommodation reservation list (step S103), and proceeds to step S101. The process returns to the process of waiting for an accommodation request.
  • step S102 if the request matches the power interchange request from the power control apparatus 100 (step S102, Yes), the power management apparatus 10 sets the interchange pattern and the start time between the interchange pairs, and sets the data to the matched interchange pair. Is transmitted (step S104).
  • the power management apparatus 10 determines the power control apparatus 100a at the location A-1 and the power control apparatus 100e at the location B-1 as an accommodation pair
  • the power management apparatuses 100a and 100e provide the power accommodation pattern and the start time. Send the information.
  • Step S105 the power management apparatus 10 waits until receiving an accommodation completion notification from the power control apparatus 100 at the site where the power accommodation is performed.
  • the power management apparatus 10 receives the end information from the two accommodated power control apparatuses 100, and acquires the difference between the planned accommodation power amount and the actual accommodation power amount. (Step S106).
  • the power management apparatus 10 determines whether or not the difference between the planned accommodation power amount and the actual accommodation power amount is within a specified range (step S107). If the difference is within the specified range (step S107, Yes), the power management apparatus 10 waits for an accommodation request in step S101. Return to processing. On the other hand, if it is not within the specified range (No at Step S107), subsequently, the power management apparatus 10 determines whether or not it is set to perform the interchange correction at the time of the difference (Step S108).
  • step S108, No If it is not set to perform the accommodation correction (step S108, No), the power management apparatus 10 returns to the processing of waiting for the accommodation request in step S101. On the other hand, if it is set to perform the accommodation correction (Step S108, Yes), the power management apparatus 10 calculates the accommodation correction value (Step S109), and transmits the accommodation correction value data to the accommodation pair (Step S104). ).
  • FIG. 6 is a flowchart illustrating an operation example of the power control apparatus 100 according to the embodiment of the present disclosure.
  • an operation example of the power control apparatus 100 according to the embodiment of the present disclosure will be described using FIG.
  • the power control device 100 When the power control device 100 starts operating, it first reads the scenario and the SOC of the power storage device 400, and calculates the amount of power required in the future (step S111). Then, as a result of the calculation of the amount of power, power control device 100 determines whether the amount of power stored in power storage device 400 and the amount of power consumption required by a load or the like is more than a specified value (step S112).
  • step S112 If the excess or deficiency is equal to or greater than the specified value (step S112, Yes), the power control apparatus 100 generates a power interchange pattern in the interchange pattern generation unit 110 and transmits the power interchange pattern to the power management apparatus 10 (step S113). At this time, the power control apparatus 100 may notify the power management apparatus 10 of the information on the power sale price when the power is provided. On the other hand, if the excess or deficiency is not equal to or greater than the specified value (No in step S112), the power control apparatus 100 skips the processing in step S113.
  • the power control device 100 determines whether or not there has been an accommodation instruction from the power management device 10 (step S114). If there is an accommodation instruction from the power management device 10 (step S114, Yes), the power control device 100 controls the bidirectional DC / AC converter 200 based on the accommodation instruction from the power management device 10. The power control apparatus 100 records the values of the AC wattmeter 300 at the start and end of the power interchange, and notifies the power management apparatus 10 of the difference (step S115). On the other hand, when there is no accommodation instruction from the power management apparatus 10 (step S114, No), the power control apparatus 100 returns to the processing of step S111.
  • the power control device 100 When controlling the bidirectional DC / AC converter 200, the power control device 100 notifies the bidirectional DC / AC converter 200a of the control current value ic.
  • FIG. 7 is a flowchart illustrating an operation example of the bidirectional DC / AC converter 200 according to the embodiment of the present disclosure.
  • an operation example of the bidirectional DC / AC converter 200 according to the embodiment of the present disclosure will be described using FIG.
  • the bidirectional DC / AC converter 200 When the bidirectional DC / AC converter 200 starts operation, it first obtains the control current value ic from the power control device 100 (step S121). Subsequently, the bidirectional DC / AC converter 200 determines whether or not the current value ir of the flowing current is within the regulation of the control current value ic when executing the power interchange (step S122).
  • step S122 If the current value ir of the flowing current is within the regulation of the control current value ic (step S122, Yes), the bidirectional DC / AC converter 200 returns to the process of step S121. On the other hand, if the current value ir of the flowing current is not within the regulation of the control current value ic (step S122, No), the bidirectional DC / AC converter 200 changes the control target value so that the current value ir is controlled. The operation is performed so as to be within the regulation of the current value ic (step S123).
  • the bidirectional DC / AC converter 200 determines whether or not the current value ir of the flowing current is within the regulation of the control current value ic (step S124). If the current value ir of the flowing current is within the regulation of the control current value ic (Step S124, Yes), the bidirectional DC / AC converter 200 returns to the process of Step S121. On the other hand, if the current value ir of the flowing current is not within the regulation of the control current value ic (No in step S124), the bidirectional DC / AC converter 200 outputs a generator (for example, AC power) when the reverse tide current is large. Of the load (for example, the load 50b) when the received current is large (step S125).
  • a generator for example, AC power
  • FIG. 8 is an explanatory diagram illustrating an example of an operation sequence by the operation of the power supply system according to the embodiment of the present disclosure.
  • FIG. 8 shows an operation sequence when power is exchanged between two locations A-1 and B-1 included in the power supply system according to the embodiment of the present disclosure.
  • the power management pattern has been generated in the two locations A-1 and B-1 in advance, and the power management apparatus 10 has determined that the demands for the power exchange between the two locations A-1 and B-1 match. I do. From time t1 to time t2, power accommodation is performed based on the power accommodation pattern.
  • the site A-1 has a power supply of 20 amps for 30 minutes, and the site B-1 supplies power of 10 amps for 30 minutes.
  • the voltage of the AC power system 1 may not be stable. If the voltage changes when a constant current is drawn, the amount of power supplied and supplied varies. Therefore, for example, even when 1 kWh of power is exchanged, the location A-1 can supply only 0.9 kWh of power, and the location B-1 may receive 1.1 kWh of power. .
  • the power management apparatus 10 generates such an error as a result of the scheduled accommodation. If the difference is equal to or more than an allowable value, the power management apparatus 10 compensates for the error by the main power company connected to the AC power system 1. Assuming that the above has been performed, the power charge for the error is settled. In the example of FIG. 8, the site A-1 sells 0.9 kWh of power to the site B-1, and the site B-1 purchases 0.9 kWh at a price agreed between the sites A-1 and B-1. However, the additional 0.2 kWh shall be purchased from a power company.
  • the amount of large discharge is determined by the specified price of the power company or the base A-1 or B-1. Shall be sold at the lower price agreed between them.
  • the power interchange for correcting the difference is executed again between the sites A-1 and B-1.
  • the power management apparatus 10 instructs the power supply apparatus 10 to supply the insufficient power of 0.1 kWh to the site A-1, and to transmit the power of 0.1 kWh, which has received much power, to the site B-1.
  • the point B-1 returns the power of 0.1 kWh to the AC power system 1 from time t3 to t4, and the power of the point A-1 is 0.1 kWh between time t5 and t6. To the AC power system 1.
  • the power management apparatus 10 calculates the arbitration fee for the power interchange between the bases and the supplementary power fee for the power transmission loss due to the length of the route to be interchanged, and calculates a bill to each customer by using a prescribed formula. May be.
  • FIG. 9 is an explanatory diagram showing changes in the currents of the power supply, the load, and the battery in time series.
  • FIG. 9 shows a change in current at the bases A-1, B-1, and C-2 in FIG. 1 and an AC wattmeter 300 at another base (for example, a base A-3 in FIG. 1) and sunlight.
  • An example of a change in current of the power generation device 500, the two loads 50, and the power storage device 400 is illustrated.
  • the power of power storage device 400 is used by the load. Thereafter, between the times t1 and t2, the base A-3 buys the electric power sold from the base A-1 for 25 yen / kWh. A part of the power supplied by the power purchase is stored in the power storage device 400, and the rest is used by the load.
  • the power purchase from the base A-1 ends, and subsequently, between the times t3 and t4, the base A-3 buys the electric power sold at 28 yen / kWh from the base B-1. .
  • the power purchase from the base B-1 ends. Then, before the time t4, the power generation by the solar power generation device 500 starts, and the power storage device 400 can store the power generated by the solar power generation device 500. Then, since there is room in the amount of power stored in power storage device 400, site A-3 sells power to site C-2 at a rate of 30 yen / kWh between time t5 and time t6.
  • the power management apparatus 10 manages the start time and the end time of the power purchase and sale at the site A-3. As the amount of power at that time, a value calculated by AC power meter 300 and notified from power control device 100 is used. Therefore, even if the power prices of the respective bases are different, one power meter per base can appropriately process.
  • the total value of the purchase and purchase electric power prices of the base A-3 is (Pt2-Pt1) ⁇ 25 yen + (Pt4-Pt3) ⁇ 28 yen ⁇ (Pt6-Pt5) ⁇ 30 yen.
  • Pt1 to Pt6 indicate the values of AC wattmeter 300 at times t1 to t6, respectively.
  • the power control device 100 periodically calculates the accumulated power amount with respect to the target power amount provided from the power management device 10 during the power interchange period specified by the power control instruction from the power management device 10, The final error between the target power amount and the accumulated power amount may be reduced by correcting the difference as needed.
  • FIG. 10 is a flowchart illustrating an operation example of the power control apparatus 100 according to the embodiment of the present disclosure.
  • an operation example of the power control apparatus 100 according to the embodiment of the present disclosure will be described using FIG.
  • the power control apparatus 100 waits until there is an instruction from the power management apparatus 10 (step S131, No), and when the instruction from the power management apparatus 10 arrives (step S131, Yes), the AC power meter 300 and the power management apparatus Then, the information from the server 10 is acquired, and each acquired information is stored in a variable (step S132).
  • the process of step S132 can be executed by, for example, the power amount acquisition unit 130.
  • the power control device 100 obtains a system voltage value from information of the AC power meter 300, calculates an average voltage value from the value, and stores the average voltage value in the variable V. Further, the power control device 100 holds the command power value from the power management device 10 in a variable P. The power control apparatus 100 stores the power flow time and the reverse power flow time in a variable t.
  • step S133 determines whether the variable t has become 0 or less.
  • the process of step S133 can be executed by, for example, the power amount acquisition unit 130. If the variable t is equal to or less than 0 (step S133, Yes), the power control device 100 ends the processing. On the other hand, if the variable t has not become equal to or less than 0 (No at Step S133), the power control apparatus 100 determines whether the variable P and t held at Step S132 or the variables P and t updated at Step S135 described below are used. Then, the current value of the bidirectional DC / AC converter 200 is calculated to instruct the bidirectional DC / AC converter 200, and the variable value is updated using the information obtained from the AC wattmeter 300 (step S134). The process of step S134 can be executed by, for example, the current control unit 120.
  • step S135 the power control device 100 updates the variable value using the information from the AC power meter 300 (step S135).
  • the process of step S135 can be executed by, for example, the power amount acquisition unit 130.
  • power control device 100 obtains the accumulated power amount from AC wattmeter 300 and calculates difference ⁇ Wh from variable W.
  • the power control apparatus 100 returns to the determination processing in step S133.
  • the power control apparatus 100 performs the series of operations illustrated in FIG. 10 to periodically calculate the accumulated power amount with respect to the target power amount provided from the power management device 10 and correct the difference as needed. can do. Then, the power control apparatus 100 can reduce the final error between the target power amount and the accumulated power amount by executing the series of operations illustrated in FIG.
  • FIG. 11 is an explanatory diagram showing an example of changes in the target power amount and the accumulated power amount during the power interchange period specified by the power control instruction from the power management device 10.
  • the horizontal axis represents time
  • the vertical axis represents the voltage value of the AC power system, the control current value of the bidirectional DC / AC converter 200, and the power amount.
  • the power control apparatus 100 updates the target power amount and sets a new control current value. Is applied to the bidirectional DC / AC converter 200 to try to reduce the error.
  • the power control apparatus 100 updates the target power amount and adds a new control current. By giving the value to the bidirectional DC / AC converter 200, an attempt is made to reduce the error.
  • the power control apparatus 100 updates the target power amount and adds a new control current. By giving the value to the bidirectional DC / AC converter 200, an attempt is made to reduce the error.
  • the power control apparatus 100 can periodically calculate the accumulated power amount with respect to the target power amount provided from the power management device 10 and correct the difference as needed. Then, the power control apparatus 100 can reduce the final error between the target power amount and the accumulated power amount.
  • FIG. 12 is an explanatory diagram illustrating effects of the embodiment of the present disclosure.
  • FIG. 12 shows two bases A-1 and X-1.
  • the base A-1 has the configuration according to the embodiment of the present disclosure, and the base X-1 has different ACs for power transmission and power reception. It has a configuration in which a power meter is provided.
  • the amount of power generated by the photovoltaic power generator (PV) is measured by one watt hour meter (AMR2) to calculate the power sale fee.
  • AMR1 the power consumption must be measured by another watt hour meter (AMR1) to calculate the power purchase fee.
  • ISV inverter
  • the base A-1 can clearly understand the power rate from the amount of power when selling and purchasing power and the interchange time. Therefore, there is an effect that only one AC wattmeter is required at the site A-1.
  • a power control device provided in a power supply system capable of exchanging power via an AC power system, and a bidirectional DC / AC converter
  • a power control device is provided that controls current and transmits the amount of power at the start and end of the interchange to a central power management device.
  • the power control device according to the embodiment of the present disclosure provides the power management device with the power amounts at the start and end of the power interchange at the time of the power interchange, so that the planned power amount and the actual interchange power amount are provided. Can be grasped.
  • a current control unit that controls input / output current between the bidirectional AC / DC converter and the AC transmission line
  • a power amount acquisition unit that acquires the actual interchange power amount during the power interchange period
  • a notification unit that notifies the power management device of information on the actual interchange power amount calculated by the power amount acquisition unit
  • a power control device comprising: (2) The power control device according to (1), wherein the notification unit requests the power management device to provide power through the AC transmission line when the power needs to be provided.
  • (14) According to a power control instruction from an external power management device, controlling the input / output current between the bidirectional AC / DC converter and the AC transmission line, Based on the power control instruction, the bidirectional AC / DC converter has input and output, to obtain the actual interchange power amount during the power interchange period, Notifying the power management device of the information on the actual amount of electric power in the electric power interchange period, And a power control method.
  • AC power system 10 Power management device 100: Power control device 200: Bidirectional DC / AC converter 300: AC power meter 400: Power storage device 500: Photovoltaic power generation device 600: AC generator

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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)

Abstract

L'invention concerne un dispositif de commande de puissance électrique qui peut conduire de manière appropriée un échange de puissance électrique à travers un système d'alimentation CA tout en maintenant le système d'alimentation CA dans un état stable. Un dispositif de commande de puissance électrique (100) comprend : une unité de commande de courant (120) qui commande un convertisseur CA-CC bidirectionnel pour commander des courants d'entrée et de sortie entre le convertisseur CA-CC bidirectionnel et une ligne de transmission CA en conformité avec une instruction de commande de puissance électrique provenant d'un dispositif de gestion de puissance externe ; une unité d'acquisition de quantité de puissance électrique (130) qui acquiert une quantité de puissance électrique échangée réelle entrée et sortie par le convertisseur CA-CC bidirectionnel pendant une période d'échange de puissance électrique sur la base de l'instruction de commande de puissance électrique ; et une unité de notification (140) qui notifie au dispositif de gestion de puissance des informations concernant la quantité de puissance électrique échangée réelle calculée par l'unité d'acquisition de quantité de puissance électrique pendant la période d'échange de puissance électrique.
PCT/JP2019/028279 2018-07-26 2019-07-18 Dispositif de commande de puissance électrique et procédé de commande de puissance électrique WO2020022182A1 (fr)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015121937A1 (fr) * 2014-02-13 2015-08-20 株式会社日立製作所 Systeme et procede de gestion d'echange d'energie electrique
WO2018078750A1 (fr) * 2016-10-26 2018-05-03 株式会社日立製作所 Dispositif, procédé et programme de gestion d'échange d'énergie

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015177566A (ja) * 2014-03-13 2015-10-05 株式会社Ｎｔｔファシリティーズ 電力融通システム、及び電力融通方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015121937A1 (fr) * 2014-02-13 2015-08-20 株式会社日立製作所 Systeme et procede de gestion d'echange d'energie electrique
WO2018078750A1 (fr) * 2016-10-26 2018-05-03 株式会社日立製作所 Dispositif, procédé et programme de gestion d'échange d'énergie

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