WO2021125287A1 - Système de commande d'alimentation, dispositif de commande d'alimentation, programme informatique de commande d'alimentation, et procédé de commande d'alimentation - Google Patents

Système de commande d'alimentation, dispositif de commande d'alimentation, programme informatique de commande d'alimentation, et procédé de commande d'alimentation Download PDF

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Publication number
WO2021125287A1
WO2021125287A1 PCT/JP2020/047239 JP2020047239W WO2021125287A1 WO 2021125287 A1 WO2021125287 A1 WO 2021125287A1 JP 2020047239 W JP2020047239 W JP 2020047239W WO 2021125287 A1 WO2021125287 A1 WO 2021125287A1
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WIPO (PCT)
Prior art keywords
power
output
renewable energy
generation device
power generation
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PCT/JP2020/047239
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English (en)
Japanese (ja)
Inventor
道彦 犬飼
喜久雄 高木
小林　武則
博明 松本
道彦 稲葉
良介 浅野
Original Assignee
株式会社 東芝
東芝エネルギーシステムズ株式会社
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Priority to JP2021565652A priority Critical patent/JP7263555B2/ja
Publication of WO2021125287A1 publication Critical patent/WO2021125287A1/fr

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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/66—Regulating electric power
    • G05F1/67—Regulating electric power to the maximum power available from a generator, e.g. from solar cell
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/76—Power conversion electric or electronic aspects

Definitions

  • the present embodiment relates to a power control system, a power control device, a computer program for power control, and a power control method for controlling the output power of a natural energy power generation device that generates power by natural energy.
  • renewable energy power generation equipment that generates electricity from natural energy such as solar power generation and wind power generation is progressing.
  • renewable energy generators are connected to the power system.
  • a power control system that controls a power system including a renewable energy power generation device is known.
  • the output power of renewable energy power generation equipment such as solar power generation and wind power generation fluctuates from moment to moment due to the influence of weather conditions such as solar radiation and wind speed.
  • the response speed characteristics of the output power of thermal power, hydraulic power, nuclear power generation equipment, and renewable energy power generation equipment are different from each other. For this reason, there is a problem that it may be difficult to perform stable control because the electric powers output from the power generation devices such as thermal power, hydraulic power, and nuclear power and the renewable energy power generation devices interfere with each other. If the power system is not controlled in a stable manner, the quality of the power supplied to the load may deteriorate.
  • An object of the present embodiment is to provide a power control system, a power control device, a computer program for power control, and a power control method capable of stably controlling a power system including a renewable energy power generation device.
  • the power control system of the present embodiment is characterized by having the following configuration.
  • a renewable energy power generation device that generates electric power from natural energy and supplies electric power to the electric power system.
  • a power control device having the following configuration.
  • (2-1) Maximum power detecting means for detecting the maximum power output from the renewable energy power generation device.
  • (2-2) A system information detecting means for detecting system information related to the electric power of the power system.
  • (2-3) An output that is equal to or less than the maximum power to be output to the renewable energy power generation device based on the maximum power detected by the maximum power detecting means and the system information detected by the system information detecting means.
  • Output power command means for calculating and instructing power.
  • the output power commanding means determines.
  • the renewable energy power generation device is instructed to suppress the output power to reduce the output power.
  • Block diagram showing the configuration of the power control system according to the first embodiment Block diagram showing the configuration of the power control device according to the first embodiment Block diagram showing the configuration of the renewable energy power generation device according to the first embodiment
  • the figure which shows the program flow of the power control apparatus which concerns on 1st Embodiment The figure explaining the operation concerning MPPT (maximum power point tracking) of the renewable energy power generation apparatus which concerns on 1st Embodiment.
  • the figure explaining the calculation method of the target power by the power control device which concerns on 1st Embodiment The figure explaining another calculation method of the target power by the power control device which concerns on 1st Embodiment
  • Output power information A1 (information on output power P1 of renewable energy power generation device 3) Maximum power information A2 (information on maximum power P2 of renewable energy power generation device 3) System information B1 (information on the power of the power system 9 transmitted from the power measuring device 4) System information B2 (information on the power of the power system 9 transmitted from the center device 8) Higher-level command C1 (command transmitted from the center device 8) Target power command D1 (command of target power P3 for renewable energy power generation device 3) Measurement target selection information E1 (information on the renewable energy power generation device to be measured for the maximum power P2) Command target selection information E2 (information on renewable energy power generation equipment that is the target of the target power command D1) Output power P1 (power output from renewable energy power generation device 3) Maximum power P2 (maximum power that can be output from the renewable energy power generation device 3) Target power P3 (target power to be output to the renewable energy power generation device 3) Different
  • the power control system 1 will be described as an example of the present embodiment with reference to FIGS. 1 to 3.
  • the present embodiment when there are a plurality of devices and members having the same configuration, they are given the same number and described, and when each device and member having the same configuration are described, they are common. Distinguish by adding an alphabetical subscript to the number.
  • the electric power control system 1 has, for example, an electric power control device 2, six renewable energy power generation devices 3, and six electric power measuring devices 4.
  • the six renewable energy power generation devices 3a, 3b, 3c, 3d, 3e, and 3f are electrically connected to the power system 9 via the cable 7.
  • the six power measuring devices 4a, 4b, 4c, 4d, 4e, and 4f are electrically connected to and arranged with the renewable energy power generation devices 3a, 3b, 3c, 3d, 3e, and 3f, respectively.
  • the power control device 2 is connected to the power measuring devices 4a, 4b, 4c, 4d, 4e, and 4f via the communication line 5a. Further, the power control device 2 is connected to the renewable energy power generation devices 3a, 3b, 3c, 3d, 3e, and 3f via the communication line 5b. Further, the power control device 2 is connected to the center device 8 which is a higher-level control device via the communication line 5c.
  • the power control device 2 transmits the output power information A1 which is the information of the output power P1 output from the renewable energy power generation device 3 and the system information B1 which is the power information of the power system 9 from the power measuring device 4 to the communication line 5a. Receive via.
  • the power control device 2 receives the system information B2, which is the power information of the power system 9, and the higher-level command C1 from the center device 8 via the communication line 5c.
  • the power control device 2 receives the maximum power information A2, which is the information of the maximum power P2 that can be output from the renewable energy power generation device 3, from the renewable energy power generation device 3 via the communication line 5b.
  • the power control device 2 transmits the target power command D1, which is a command of the target power P3 to be output to the renewable energy power generation device 3, to the renewable energy power generation device 3 via the communication line 5b.
  • the renewable energy power generation device 3 is a power supply device that generates electric power by receiving solar energy or wind power which is renewable energy.
  • the power control system 1 includes, as an example, a renewable energy power generation device 3a, 3b, 3c, 3d, 3e, 3f, which is a photovoltaic power generation device.
  • the renewable energy power generation devices 3a, 3b, 3c, 3d, 3e, and 3f are electrically connected in parallel by the cable 7.
  • the renewable energy power generation devices 3a, 3b, 3c, 3d, 3e, and 3f supply the generated power to the power system 9 via the cable 7.
  • the renewable energy power generation device 3 is installed at an outdoor solar power generation site or the like.
  • the renewable energy power generation device 3 is connected to the power control device 2 via the communication line 5b.
  • the renewable energy power generation device 3 includes a power generation unit 31, a power conversion unit 32, and a control unit 33.
  • the power generation unit 31 is composed of a solar panel and converts the received sunlight into DC power.
  • the converted DC power is supplied to the power conversion unit 32.
  • the power generation unit 31 may be composed of a wind power generation unit.
  • the power conversion unit 32 is composed of a conversion circuit such as an inverter having a switching element.
  • the power conversion unit 32 converts the DC power generated by the power generation unit 31 into AC power applied to the output power P1.
  • the AC power applied to the converted output power P1 is supplied to the power system 9 via the cable 7.
  • the power conversion unit 32 is controlled by the control unit 33.
  • the control unit 33 is composed of a control circuit such as a microcomputer.
  • the control unit 33 receives the target power command D1 which is a command of the target power P3 to the renewable energy power generation device 3 from the power control device 2 via the communication line 5b.
  • the control unit 33 controls the output power P1 output from the power conversion unit 32 based on the target power command D1.
  • control unit 33 incorporates a maximum power measurement module N1 configured by software that controls the power conversion unit 32.
  • the maximum power measurement module N1 detects the maximum power P2 that can be output from the renewable energy power generation device 3.
  • the maximum power P2 is detected by MPPT (maximum power point tracking) that sequentially changes the output voltage of the renewable energy power generation device 3 and detects the maximum power.
  • the maximum electric power P2 for each renewable energy power generation device 3 is transmitted to the power control device 2 via the communication line 5b.
  • the power measuring device 4 is a power measuring device composed of circuits for measuring power, voltage, current, and frequency.
  • the power measuring device 4 is connected to the power control device 2 via the communication line 5a.
  • the power measuring device 4 measures the output power P1 and the output voltage V1 output from the renewable energy power generation device 3, and transmits the output power information A1 which is the output power information of the renewable energy power generation device 3 to the power control device 2.
  • the power measuring device 4 measures the frequency f of the power system 9 and transmits it to the power control device 2 as system information B1 which is information on the power of the power system 9.
  • the power measuring devices 4a to 4f are electrically connected to and arranged in the renewable energy power generation devices 3a to 3f, respectively.
  • the power measuring device 4a measures the output power P1a and the output voltage V1a output from the renewable energy power generation device 3a, and transmits the output power information A1a to the power control device 2.
  • the power measuring devices 4b to 4f measure the output powers P1b to P2f and the output voltages V1b to V1f output from the renewable energy power generation devices 3b to 3f, respectively, and transmit the output power information A1b to A1f to the power control device 2. ..
  • the center device 8 is a higher-level control device configured by a computer or the like.
  • the center device 8 is connected to the power control device 2 via the communication line 5c.
  • the center device 8 is installed in a command room such as a power supply command center, a system control center, or a centralized control center that monitors and controls the power system.
  • the center device 8 transmits system information B2, which is information on the power of the power system 9, and higher-level command C1, which is a command to the renewable energy power generation device 3, to a plurality of power control devices 2 arranged at each photovoltaic power generation site or the like. Then, control the generated power of each photovoltaic power generation site.
  • the system information B2 includes information on the voltage, current, frequency, etc. of the power system 9, information on the required power of the power system 9, and information on the supplied power.
  • the communication lines 5a, 5b, and 5c are composed of a dedicated line, a communication line such as the Internet, and a communication line such as a telephone line. Communication between the power measuring device 4 and the power control device 2 is performed by the communication line 5a. Communication between the power control device 2 and the renewable energy power generation device 3 is performed by the communication line 5b. Communication between the power control device 2 and the center device 8 is performed by the communication line 5c.
  • the cable 7 is composed of a power cable.
  • the cable 7 electrically connects the renewable energy power generation device 3 and the electric power system 9.
  • the cable 7 supplies the electric power output from the renewable energy power generation device 3 to the electric power system 9.
  • the power system 9 is a power supply network that supplies AC power.
  • the power system 9 supplies the power output from the renewable energy power generation device 3 and the power generated by a power generation device such as thermal power, hydraulic power, or nuclear power (not shown in the figure) to the consumer.
  • the power control device 2 is a device configured by a computer or the like.
  • the power control device 2 is installed in a power management room or the like that monitors and controls a photovoltaic power generation site or the like.
  • the power control device 2 is connected to the power measuring devices 4a, 4b, 4c, 4d, 4e, and 4f via the communication line 5a.
  • the power control device 2 is connected to the renewable energy power generation device 3a, 3b, 3c, 3d, 3e, 3f via the communication line 5b.
  • the power control device 2 is connected to the center device 8 which is a higher-level control device via the communication line 5c.
  • the power control device 2 receives the output power information A1 which is the information of the output power P1 output from the renewable energy power generation device 3 and the system information B1 which is the power information of the power system 9 from the power measuring device 4.
  • the power control device 2 receives the maximum power information A2 related to the maximum power P2 that can be output from the renewable energy power generation device 3 from the renewable energy power generation device 3.
  • the power control device 2 receives the system information B2 and the upper command C1 from the center device 8.
  • the power control device 2 transmits the target power command D1 which is a command of the target power P3 which is the target power to be output to the renewable energy power generation device 3 to the renewable energy power generation device 3.
  • the power control device 2 has a communication unit 21, a communication unit 22, a communication unit 23, an output unit 24, a storage unit 25, and a calculation unit 26.
  • the communication unit 21 is composed of a communication interface with a communication line such as a dedicated line, the Internet, and a telephone line.
  • the communication unit 21 is connected to the calculation unit 26 inside the power control device 2.
  • the communication unit 21 is connected to the power measuring devices 4a to 4f via the communication line 5a.
  • the communication unit 21 receives the output power information A1 from the power measuring device 4 selected from the power measuring devices 4a to 4f.
  • the output power information A1 includes information on the output power P1 and the output voltage V1 output from the renewable energy power generation device 3 connected to the power measuring device 4.
  • the communication unit 21 receives the system information B1 which is the power information of the power system 9 from the power measuring device 4 selected from the power measuring devices 4a to 4f.
  • the system information B1 includes information regarding the frequency f1 applied to the power of the power system 9.
  • the communication unit 22 is composed of a communication interface with a communication line such as a dedicated line, the Internet, and a telephone line.
  • the communication unit 22 is connected to the calculation unit 26 inside the power control device 2.
  • the communication unit 22 is connected to the center device 8 via the communication line 5c.
  • the communication unit 22 receives the system information B2 and the higher-level command C1 from the center device 8.
  • the higher-level command C1 includes a command for increasing or decreasing the output power of the renewable energy power generation device 3, and an amount of increase or decrease.
  • the communication unit 23 is composed of a communication interface with a communication line such as a dedicated line, the Internet, and a telephone line.
  • the communication unit 23 is connected to the calculation unit 26 inside the power control device 2. Further, the communication unit 23 is connected to the renewable energy power generation devices 3a to 3f via the communication line 5b.
  • the communication unit 23 receives the maximum power information A2, which is the information of the maximum power P2 that can be output from the natural energy power generation device 3, from the natural energy power generation device 3 selected from the natural energy power generation devices 3a to 3f. ..
  • the communication unit 23 transmits the target power command D1 which is a command of the target power P3 to be output to the renewable energy power generation device 3 to the renewable energy power generation device 3 selected from the renewable energy power generation devices 3a to 3f.
  • the output unit 24 is composed of a display device, a printer, a communication interface, and the like.
  • the output unit 24 is connected to the calculation unit 26 inside the power control device 2.
  • the output unit 24 displays, prints, and displays the differential power P4, which is the difference between the output power P1 output from the renewable energy power generation device 3 and the maximum power P2 that can be output from the renewable energy power generation device 3. Output by.
  • the storage unit 25 is composed of a storage medium such as a semiconductor memory or a hard disk.
  • the storage unit 25 is connected to the calculation unit 26 inside the power control device 2.
  • the storage unit 25 has maximum power information A2 which is information on the maximum power P2 that can be output from the renewable energy power generation device 3, system information B1 and system information B2 which is information on the power of the power system 9, and the renewable energy power generation device.
  • the target power command D1, which is a command of the target power P3 with respect to 3, is sequentially stored for each renewable energy power generation device 3.
  • the storage unit 25 selects the command target, which is the information of the renewable energy power generation device 3 which is the command target of the measurement target selection information E1 and the target power command D1 which are the information of the renewable energy power generation device 3 which is the measurement target of the maximum power P2. Information E2 is stored. The writing and reading of data to the storage unit 25 is controlled by the calculation unit 26.
  • the calculation unit 26 is composed of a CPU or the like built in the computer.
  • the calculation unit 26 is connected to the communication unit 21, the communication unit 22, the communication unit 23, the output unit 24, and the storage unit 25 inside the power control device 2.
  • the calculation unit 26 performs the following control.
  • (B) Control for communication unit 21 The calculation unit 26 controls the communication unit 21, and the power information A1 and the power information of the power system 9 which are the information of the output power P1 of the renewable energy power generation device 3 from the power measurement device 4. The system information B1 is received.
  • (B) Control for communication unit 22 The calculation unit 26 controls the communication unit 22 and receives system information B2 and higher-level command C1 from the center device 8.
  • (C) Control for communication unit 23 The calculation unit 26 controls the communication unit 23 and receives the maximum power information A2 which is the information of the maximum power P2 of the renewable energy power generation device 3 from the renewable energy power generation device 3. The calculation unit 26 controls the communication unit 23 and transmits the target power command D1 which is a command of the target power P3 to the renewable energy power generation device 3 to the renewable energy power generation device 3.
  • (D) Control for output unit 24 The calculation unit 26 controls the output unit 24, and the output power P1 output from the renewable energy power generation device 3 and the maximum power P2 that can be output from the natural energy power generation device 3
  • the differential power P4 which is the difference, is output by display, printing, and communication message.
  • (E) Control of the storage unit 25 The calculation unit 26 controls the storage unit 25 to obtain maximum power information A2, system information B1, system information B2, target power command D1, measurement target selection information E1, and command target selection information E2. , Write and read.
  • the calculation unit 26 in the calculation unit 26 includes an output adjustment module M1 composed of software, a difference calculation module M2, a measurement target selection module M3, a command target selection module M4, and a system information detection module M5.
  • the calculation unit 26 calculates the target power P3 to be output to the renewable energy power generation device 3 by the output adjustment module M1.
  • the target power P3 is calculated for the renewable energy power generation device 3 selected from the renewable energy power generation devices 3a to 3f, and is instructed to the renewable energy power generation device 3 selected by the target power command D1.
  • the calculation unit 26 detects the system information B1 and B2 related to the power of the power system 9 by the system information detection module M5.
  • the system information B1 is transmitted from the control unit 33 of the renewable energy power generation device 3.
  • the system information B2 is transmitted from the center device 8.
  • the calculation unit 26 calculates the differential power P4, which is the difference between the output power P1 output from the renewable energy power generation device 3 and the maximum power P2 that can be output from the natural energy power generation device 3, by the difference calculation module M2. ..
  • the calculated differential power P4 is output from the output unit 24 by display, printing, and communication telegram.
  • the calculation unit 26 selects the renewable energy power generation device 3 to be measured of the maximum power P2 that can be output from the renewable energy power generation devices 3a to 3f by the measurement target selection module M3.
  • the renewable energy power generation device 3 to be measured with the maximum power P2 is selected one or more from the renewable energy power generation devices 3a to 3f, and is stored in the storage unit 25 as the measurement target selection information E1. Further, based on the measurement target selection information E1, the maximum power information A2, which is the information of the maximum power P2, is received from the renewable energy power generation device 3 selected from the renewable energy power generation devices 3a to 3f.
  • the calculation unit 26 selects the renewable energy power generation device 3 to be the command target of the target power command D1 from the renewable energy power generation devices 3a to 3f by the command target selection module M4.
  • the renewable energy power generation device 3 to be commanded by the target power command D1 is selected one or more from the renewable energy power generation devices 3a to 3f, and is stored in the storage unit 25 as the command target selection information E2. Further, the target power command D1 which is a command of the target power P3 is transmitted to the renewable energy power generation device 3 selected from the renewable energy power generation devices 3a to 3f based on the command target selection information E2.
  • FIG. 4 is a diagram showing a flow of a program built in the power control device 2.
  • the program shown in FIG. 4 is built in the calculation unit 26 of the power control device 2.
  • the renewable energy power generation device 3 In the electric power control system 1, the renewable energy power generation device 3 generates electric power by natural energy and supplies electric power to the electric power system 9.
  • the control unit 33 of the renewable energy power generation device 3 incorporates the maximum power measurement module N1.
  • the control unit 33 of the renewable energy power generation device 3 measures the maximum power P2 that can be output from the renewable energy power generation device 3 by the maximum power measurement module N1, and includes the maximum power P2 in the maximum power information A2 for power control. It is transmitted to the device 2.
  • the control unit 33 of the renewable energy power generation device 3 sequentially changes the output voltage applied to the power output from the power conversion unit 32 by the maximum power measurement module N1, and detects the maximum power P2 by MPPT (maximum power point tracking). ..
  • the power control device 2 detects the maximum power P2 that can be output from the renewable energy power generation device 3 by receiving the maximum power information A2 from the natural energy power generation device 3.
  • the power control device 2 receives the maximum power information A2 by the communication unit 23.
  • the power control device 2 detects system information B1 and B2 regarding the power of the power system 9.
  • the calculation unit 26 of the power control device 2 receives the system information B1 from the control unit 33 of the renewable energy power generation device 3 and the system information B2 from the center device 8 by the built-in system information detection module M5. By receiving the system information B1 and B2, the power control device 2 detects information on the voltage, current, frequency, etc. of the power system 9, and information on the required power and the supplied power of the power system 9.
  • the power control device 2 calculates the target power P3 which is equal to or less than the maximum power P2 to be output to the renewable energy power generation device 3 based on the maximum power P2 required for the maximum power information A2, the system information B1 and the system information B2, and the natural energy. Instruct the power generation device 3.
  • the calculation unit 26 of the power control device 2 calculates the target power P3 by the built-in output adjustment module M1.
  • the power control device 2 is based on the system information B1 transmitted from the control unit 33 of the renewable energy power generation device 3 and the system information B2 transmitted from the center device 8, and the power of the power system 9 is within a predetermined frequency range. If it is determined that the power is not present, the renewable energy power generation device 3 is instructed to reduce the output power P1 to the target power P3.
  • the calculation unit 26 of the power control device 2 calculates the target power P3, which is less than the output power P1, by the built-in output adjustment module M1.
  • the power control device 2 transmits the target power P3 from the communication unit 23 to the renewable energy power generation device 3 according to the target power command D1, and instructs the target power P3.
  • the power control device. 2 gives an instruction to the renewable energy power generation device 3 to reduce the output power P1 to the target power P3 by transmitting the target power command D1.
  • ⁇ f1 may be referred to as being within the first frequency range.
  • the power control device 2 transmits an instruction to reduce the output power P1 to the target power P3 to the renewable energy power generation device 3 with the target power command D1. To be done by.
  • the power control device 2 calculates the differential power P4, which is the difference between the output power P1 output from the renewable energy power generation device 3 and the maximum power P2 that can be output from the natural energy power generation device 3, and the output unit 24 calculates the differential power P4. Output.
  • the calculation unit 26 of the power control device 2 calculates the difference power P4 by the difference calculation module M2.
  • the power control device 2 detects information related to the power of the power system 9 by the system information B1 transmitted from the control unit 33 of the renewable energy power generation device 3 and the system information B2 transmitted from the center device 8. When the power control device 2 determines that the power of the power system 9 is within a predetermined frequency range based on the system information B1 and B2, the power control device 2 can output the maximum power that can be output to the renewable energy power generation device 3. Instruct to output P2.
  • the power control device 2 gives an instruction to the renewable energy power generation device 3 to set the output power P1 to the maximum power P2 by transmitting the target power command D1.
  • ⁇ f2 may be referred to as being within the second frequency range.
  • the power control device 2 issues an instruction to set the output power P1 to the maximum power P2 to the target power command D1 to the renewable energy power generation device 3. It is done by sending.
  • the power control device 2 instructs some of the renewable energy power generation devices 3 among the plurality of renewable energy power generation devices 3 to output the power applied to the target power P3 by the target power command D1.
  • the calculation unit 26 of the power control device 2 selects a part of the renewable energy power generation devices 3 among the plurality of renewable energy power generation devices 3 as the target for instructing the target power command D1 by the command target selection module M4.
  • the power control device 2 detects the maximum power P2 of the selected renewable energy power generation device 3 from the plurality of renewable energy power generation devices 3.
  • the calculation unit 26 of the power control device 2 selects a part of the renewable energy power generation devices 3 to be measured of the maximum power P2 from the plurality of renewable energy power generation devices 3 by the measurement target selection module M3.
  • the above operation is realized by the program shown in FIG.
  • the program shown in FIG. 4 is built in the calculation unit 26 of the power control device 2.
  • the program shown in FIG. 4 is repeatedly executed at regular intervals.
  • the program shown in FIG. 4 is executed, for example, in a cycle of 5 minutes or 30 minutes.
  • the calculation unit 26 of the power control device 2 performs an operation related to power control of the renewable energy power generation device 3 according to the following procedure.
  • Step S01 Select the renewable energy power generation device 3 to be measured for the maximum power P2
  • the calculation unit 26 of the power control device 2 selects the renewable energy power generation device 3 to be measured for the maximum power P2 from the plurality of natural energy power generation devices 3 by the built-in measurement target selection module M3.
  • the renewable energy power generation device 3a located on the east side of the renewable energy site and the renewable energy power generation device 3d located on the west side are selected as the measurement targets of the maximum power P2.
  • the renewable energy power generation device 3 to be selected is not limited to this, and may be arbitrarily selected.
  • the renewable energy power generation devices 3a and 3d selected as the measurement target of the maximum power P2 are stored in the storage unit 25 as the measurement target selection information E1.
  • Step S02 Measure the maximum power P2
  • the calculation unit 26 of the power control device 2 detects the maximum power of the selected renewable energy power generation devices 3a and 3d based on the measurement target selection information E1 stored in the storage unit 25.
  • the calculation unit 26 of the power control device 2 receives the maximum power information A2, which is information on the maximum power P2 that can be output from the renewable energy power generation devices 3a and 3d, via the communication unit 23.
  • the maximum power P2 is measured at regular intervals, and the maximum power information A2 is transmitted to the power control device 2.
  • the electric power generated by the power generation unit 31 in the renewable energy power generation device 3 is converted from direct current to alternating current by the power conversion unit 32.
  • the control unit 33 controls the output power P1 of the power conversion unit 32.
  • the control unit 33 incorporates a maximum power measurement module N1 configured by software.
  • the control unit 33 measures the maximum power P2 that can be output from the renewable energy power generation device 3 by the maximum power measurement module N1.
  • the maximum power P2 is detected by MPPT (Maximum Power Point Tracking).
  • the output voltage of the power conversion unit 32 is sequentially changed by MPPT (maximum power point tracking) as shown in FIG. 5, and the maximum power is detected as the maximum power P2.
  • the maximum power P2 of the renewable energy power generation devices 3a and 3d is included in the maximum power information A2 and transmitted to the power control device 2 via the communication line 5b.
  • the calculation unit 26 of the power control device 2 receives the maximum power information A2 via the communication unit 23, and detects the maximum power P2 of the renewable energy power generation devices 3a and 3d.
  • Step S02 or the maximum power measuring module N1 in the program may be referred to as the maximum power detecting means.
  • Step S03 Receive system information B1 and system information B2
  • the calculation unit 26 of the power control device 2 detects system information B1 and B2 regarding the power of the power system 9.
  • the calculation unit 26 of the power control device 2 receives the system information B1 transmitted from the control unit 33 of the renewable energy power generation device 3 and the system information B2 transmitted from the center device 8 by the built-in system information detection module M5. , Detects information about the power of the power system 9.
  • the calculation unit 26 of the power control device 2 selects the natural energy power generation devices 3a and 3d from the natural energy power generation devices 3a to 3f, and the natural energy.
  • the system information B1a and B1d are received from the power measuring devices 4a and 4d connected to the power generation devices 3a and 3d, respectively.
  • the calculation unit 26 of the power control device 2 receives the system information B1a and B1d by the communication unit 21 via the communication line 5a.
  • the arithmetic unit 26 of the power control device 2 receives the system information B2 from the center device 8.
  • the arithmetic unit 26 of the power control device 2 receives the system information B2 by the communication unit 22 via the communication line 5c.
  • the received system information B1a, B1d, and system information B2 are stored in the storage unit 25.
  • the system information B1a and B1d include information on the frequency f applied to the power of the power system 9.
  • the system information B2 includes information on the voltage, current, frequency, etc. of the power system 9, information on the required power of the power system 9, and information on the supplied power.
  • Step S03 or the system information detection module M5 in the program may be referred to as system information detection means.
  • Step S04 Select the renewable energy power generation device 3 to be commanded by the target power P3
  • the calculation unit 26 of the power control device 2 selects the renewable energy power generation device 3 to be the target of the command to output the target power P3 from the plurality of renewable energy power generation devices 3 by the built-in command target selection module M4. To do.
  • the renewable energy power generation device 3 whose output power is averaged is selected from the renewable energy power generation devices 3a to 3f as the target of the command to output the target power P3. For example, two renewable energy power generators 3c and 3d that output a large amount of electric power are selected.
  • the renewable energy power generation device 3 to be selected is not limited to this, and may be arbitrarily selected.
  • the renewable energy power generation devices 3c and 3d selected as the target of the command to output the target power P3 are stored in the storage unit 25 as the command target selection information E2.
  • the renewable energy power generation device 3 to be commanded by the target power P3 may overlap with the renewable energy power generation device 3 to be measured by the maximum power P2.
  • Step S05 Determining whether the frequency f is within the predetermined frequency ⁇ f2)
  • step S03 based on the system information B1 and B2 detected by the system information detection module M5 and stored in the storage unit 25, the calculation unit 26 of the power control device 2 determines the frequency f of the power in the power system 9 in advance. It is determined whether or not the frequency is within the range of ⁇ f2.
  • the power frequency f in the power system 9 is in the range of f0 ⁇ f2 ⁇ f ⁇ f0 + ⁇ f2, the power frequency f in the power system 9 is within a predetermined frequency ⁇ f2 with respect to the reference frequency f0. Is judged.
  • f0- ⁇ f2 49.9 Hz
  • f0 + ⁇ f2 50.1 Hz
  • the power frequency f in the power system 9 is 49.9 Hz ⁇ f ⁇ 50.1 Hz
  • step S05 When it is determined that the frequency f is within the predetermined frequency range (YES in step S05), the program shifts to step S06. If it is not determined that the frequency f is within the predetermined frequency range (NO in step S05), the program proceeds to step S07.
  • Step S06 Instruct the renewable energy power generation device 3 to output the maximum power P2
  • the power control device 2 selects the natural power based on the command target selection information E2 stored in the storage unit 25 in step S04.
  • the energy power generation devices 3c and 3d are instructed to set the output power P1 to the maximum power P2 by the target power command D1.
  • the calculation unit 26 of the power control device 2 instructs the target power command D1 by the built-in output adjustment module M1.
  • the target power command D1 is transmitted to the renewable energy power generation devices 3a to 3f via the communication unit 23 and the communication line 5b.
  • the instruction to set the output power P1 to the maximum power P2 may be transmitted to all the renewable energy power generation devices 3a to 3f.
  • Step S07 Instruct the renewable energy power generation device 3 to output the target power P3
  • the calculation unit 26 of the power control device 2 is based on the command target selection information E2 stored in the storage unit 25 in step S04.
  • the selected renewable energy power generation devices 3c and 3d are instructed to output the power applied to the target power P3 by the target power command D1 which is a command of the output power.
  • the calculation unit 26 of the power control device 2 calculates the target power P3 to be applied to the target power command D1 by the built-in output adjustment module M1.
  • the target power command D1 is transmitted to the renewable energy power generation devices 3c and 3d via the communication unit 23 and the communication line 5b.
  • the target power P3 is calculated based on the maximum power P2 detected in step S02 and the system information B1 and B2 detected in step S03. It is estimated that the maximum powers P2a and P2d of the renewable energy power generation devices 3a and 3d are similar to the maximum power P2 of the renewable energy power generation devices 3b, 3c, 3e and 3f arranged at the same photovoltaic power generation site. Will be done. Therefore, the target power P3 for the renewable energy power generation devices 3c and 3d has a certain degree of certainty even if it is calculated based on the maximum powers P2a and P2d.
  • the power less than the maximum powers P2a and P2d detected by the renewable energy power generation devices 3a and 3d is calculated as the target power P3.
  • the target power P3 is calculated by subtracting a constant power ⁇ P from the maximum power P2 as shown in FIGS. 5 and 6. As shown in FIG. 6, the target power P3 is calculated for each time.
  • the target power P3 may be calculated so as to have a constant ratio with respect to the maximum power P2. As shown in FIG. 7, the target power P3 is calculated for each time.
  • the target power P3 calculated in step S07 is the target power P3k and the target power P3 calculated in step S11 described later is the target power P3j, it is desirable to calculate the target power P3k such that P3k> P3j.
  • Step S07 or the output adjustment module M1 in the program may be referred to as output power command means.
  • Step S08 Determine whether the higher command C1 has been received
  • the calculation unit 26 of the power control device 2 determines whether or not the higher command C1 has been received from the center device 8.
  • the higher-level command C1 is transmitted from the center device 8 to the calculation unit 26 via the communication line 5c and the communication unit 22.
  • the higher-level command C1 includes a command for increasing or decreasing the output power of the renewable energy power generation device 3, and an amount of increase or decrease.
  • step S08 If it is determined that the higher command C1 has been received (YES in step S08), the program proceeds to step S09. If it is not determined that the higher command C1 has been received (NO in step S08), the program proceeds to step S10.
  • Step S09 Instruct the renewable energy power generation device 3 to output the target power P3
  • the calculation unit 26 of the power control device 2 selects renewable energy power generation based on the command target selection information E2 stored in the storage unit 25 in step S04.
  • the devices 3c and 3d are instructed to output the power applied to the target power P3 by the target power command D1.
  • the calculation unit 26 of the power control device 2 calculates the target power P3 to be applied to the target power command D1 by the built-in output adjustment module M1.
  • the target power command D1 is transmitted to the renewable energy power generation devices 3c and 3d via the communication unit 23 and the communication line 5b.
  • the target power P3 is calculated based on the command for increasing or decreasing the output power included in the higher-level command C1 determined to have been received in step S08, and the amount of increase or decrease.
  • the higher-level command C1 instructs to increase the output power P1 of the renewable energy power generation device 3
  • the amount of increase applied to the higher-level command C1 is apportioned to the renewable energy power generation devices 3c and 3d to calculate the target power P3.
  • the renewable energy power generation devices 3c and 3d receive the target power command D1 and increase the output power P1 to the target power P3.
  • the reduction amount applied to the higher-level command C1 is apportioned to the renewable energy power generation devices 3c and 3d to calculate the target power P3. ..
  • the renewable energy power generation devices 3c and 3d receive the target power command D1 and reduce the output power P1 to the target power P3.
  • step S09 for instructing the renewable energy power generation device 3 to output the target power P3 is performed in preference to the operation related to steps S05 to S07.
  • Step S09 or the output adjustment module M1 in the program may be referred to as output power command means.
  • Step S10 Determine if the frequency f is within the predetermined frequency ⁇ f1
  • the calculation unit 26 of the power control device 2 determines the frequency f of the power in the power system 9 in advance based on the system information B1 and B2 detected by the system information detection module M5 and stored in the storage unit 25. It is determined whether or not the frequency is within the range of ⁇ f1.
  • the power frequency f in the power system 9 is in the range of f0 ⁇ f1 ⁇ f ⁇ f0 + ⁇ f1
  • the power frequency f in the power system 9 is within the range of the frequency ⁇ f1 predetermined with respect to the reference frequency f0. Is judged.
  • the power frequency f in the power system 9 is 49 Hz ⁇ f ⁇ 51 Hz
  • step S10 If it is not determined that the frequency f is within the predetermined frequency ⁇ f1 (NO in step S10), the program shifts to step S11. When it is determined that the frequency f is within the range of the predetermined frequency ⁇ f1 (YES in step S10), the program shifts to step S12.
  • Step S11 Instruct the renewable energy power generation device 3 to output the target power P3
  • the calculation unit 26 of the power control device 2 is stored in the storage unit 25 by the command target selection module M4 in step S04.
  • the selected renewable energy power generation devices 3c and 3d are instructed to output the power applied to the target power P3 by the target power command D1 which is a command of the output power.
  • the calculation unit 26 of the power control device 2 calculates the target power P3 to be applied to the target power command D1 by the built-in output adjustment module M1.
  • the target power command D1 is transmitted to the renewable energy power generation devices 3c and 3d via the communication unit 23 and the communication line 5b.
  • the target power P3 is set to be less than the output power P1 currently output from the renewable energy power generation devices 3c and 3d. Further, when the target power P3 calculated in step S07 is the target power P3k and the target power P3 calculated in step S11 is the target power P3j, it is desirable to calculate the target power P3j such that P3k> P3j.
  • the operation related to step S11 for instructing the renewable energy power generation device 3 to output the target power P3 is performed in preference to the operations related to steps S05 to S09.
  • the power generation devices such as thermal power, hydraulic power, and nuclear power in the power system 9 (not shown in the figure) have the frequencies of the power system 9. Is controlled to keep the frequency constant.
  • the frequency f of the electric power in the electric power system 9 is not in the range of f0- ⁇ f1 ⁇ f ⁇ f0 + ⁇ f1, for example, when it is not in the range of 49 Hz ⁇ f ⁇ 51 Hz, it is more stable due to a power generation device such as thermal power, hydraulic power, or nuclear power. It is inferred that frequency control is not performed.
  • the output power P1 of the renewable energy power generation device 3 fluctuates from moment to moment due to the influence of weather conditions such as solar radiation and wind speed. Further, the response speed characteristics of the output power of the power generation device such as thermal power, hydraulic power, nuclear power, and the renewable energy power generation device 3 are different from each other. For this reason, power generation devices such as thermal power, hydraulic power, and nuclear power and electric power output from the renewable energy power generation device 3 may interfere with each other, and frequency control by the power generation devices such as thermal power, hydraulic power, and nuclear power may not function efficiently. ..
  • the calculation unit 26 of the power control device 2 issues the target power command D1 to the renewable energy power generation devices 3c and 3d as shown in FIG.
  • the target power P3 gives an instruction to reduce the output power P1.
  • the calculation unit 26 of the power control device 2 still uses the renewable energy power generation device 3c. 3d is instructed to reduce the output power P1 by the target power P3 applied to the target power command D1.
  • the output electric power command means of the electric power control device 2 causes the renewable energy power generation apparatus 3 to reduce the output electric power P1 by the target electric power command D1. Gives an output power suppression instruction.
  • the target power P3 may be transmitted to all the renewable energy power generation devices 3a to 3f according to the target power command D1.
  • the renewable energy power generation devices 3a to 3f in which the target power P3 is instructed by the target power command D1 reduce the output power P1.
  • Step S11 or the output adjustment module M1 in the program may be referred to as output power command means.
  • Step S12 Calculate the differential power P4
  • the calculation unit 26 of the power control device 2 calculates the differential power P4.
  • the calculation unit 26 of the power control device 2 is the difference between the output power P1 output from the renewable energy power generation device 3 by the built-in difference calculation module M2 and the maximum power P2 that can be output from the natural energy power generation device 3.
  • a certain differential power P4 is calculated.
  • the differential power P4 is calculated for each of the renewable energy power generation devices 3a to 3f.
  • Step S13 Output the differential power P4
  • the calculation unit 26 of the power control device 2 causes the output unit 24 to output the data related to the differential power P4 calculated in step S12.
  • the output unit 24 displays, prints, and outputs the data related to the differential power P4 by a communication telegram.
  • the output data related to the differential power P4 is useful for billing charges by the operating company of the renewable energy power generation device 3.
  • Step S13 and the output unit 24 in the program may be referred to as output means.
  • the above is the operation of the power control system 1.
  • the frequency f is not within the range of the frequency ⁇ f3 whose frequency can be controlled by the power generation devices such as thermal power, hydraulic power, and nuclear power of the power system 9
  • the target power P3 is set to zero for the renewable energy power generation devices 3a to 3f.
  • the power command D1 may be transmitted.
  • the output power P1 of the renewable energy power generation device 3 is suppressed as the frequency f of the power system 9 is separated from the reference frequency f0.
  • the power control system 1 generates a natural energy power generation device 3 that generates power by natural energy and supplies power to the power system 9, and a maximum power P2 output from the natural energy power generation device 3.
  • the maximum power detecting means to be detected the system information detecting means for detecting the system information B1 and B2 related to the power of the power system 9, the maximum power P2 detected by the maximum power detecting means, and the system detected by the system information detecting means. Since it has an output power command means for calculating and instructing a target power P3 which is equal to or less than the maximum power P2 to be output to the renewable energy power generation device 3 based on the information B1 and B2, and a power control device 2 provided with the natural energy. It is possible to provide a power control system 1 capable of stably controlling a power system 9 including a power generation device 3.
  • the renewable energy power generation device 3 is instructed by the target power command D1 to output the target power P3, and outputs the output power P1 applied to the target power P3 which is equal to or less than the maximum power P2.
  • the output power P1 applied to the above can be output to the renewable energy power generation device 3.
  • the renewable energy power generation device 3 outputs an output power P1 which is equal to or less than the maximum power P2, and a steep request for an increase in the output power P1 is commanded by the center device 8 by the higher-level command C1.
  • the output power P1 can be easily increased.
  • the power control system 1 has the power of the power system 9 within a predetermined range of the first frequency ⁇ f1 based on the system information B1 and B2 detected by the system information detecting means. If it is determined that the power system does not exist, the output power command means (step S11 or the output adjustment module M1) instructs the renewable energy power generation device 3 to reduce the output power P1. Therefore, the power system including the renewable energy power generation device 3 It is possible to provide a power control system 1 capable of stably controlling 9.
  • the output power command means when it is determined that the power of the power system 9 is less than the predetermined first frequency range based on the system information B1 and B2 detected by the system information detecting means, the output power command means. Instructs the renewable energy power generation device 3 to suppress the output power P1 to reduce the output power P1. Therefore, the power control system 1 capable of stably controlling the power system 9 including the renewable energy power generation device 3. Can be provided.
  • the instruction for reducing the output power is called the renewable energy output power suppression instruction.
  • the output power P1 of the renewable energy power generation device 3 fluctuates from moment to moment due to the influence of weather conditions such as solar radiation and wind speed. Further, the response speed characteristics of the output power of the power generation device such as thermal power, hydraulic power, nuclear power, and the renewable energy power generation device 3 are different from each other. For this reason, power generation devices such as thermal power, hydraulic power, and nuclear power and electric power output from the renewable energy power generation device 3 may interfere with each other, and frequency control by the power generation devices such as thermal power, hydraulic power, and nuclear power may not function efficiently. ..
  • the renewable energy power generation device 3 When frequency control by power generation devices such as thermal power, hydraulic power, and nuclear power does not function efficiently, it is desirable to suppress the output power P1 of the renewable energy power generation device 3. Even when the power of the power system 9 is less than the predetermined first frequency range, the renewable energy power generation device 3 is instructed to reduce the output power P1, so that the output of the renewable energy power generation device 3 is output. It is possible to reduce the ratio of the electric power P1 in the electric power system 9 and secure stable frequency control by a power generation device such as thermal power, hydraulic power, or nuclear power. As a result, the electric power system 9 including the renewable energy power generation device 3 can be stably controlled.
  • the power control device 2 is detected by the output power P1 output from the renewable energy power generation device 3 based on the target power P3 instructed by the output power command means and the maximum power detecting means. Since it has an output means for calculating and outputting the differential power P4 with the maximum power P2, the data related to the output differential power P4 is useful for billing by the operating company of the renewable energy power generation device 3.
  • the power control device 2 has the power of the power system within a predetermined second frequency ⁇ f2 based on the system information B1 and B2 detected by the system information detecting means. If it is determined that there is, the output power command means instructs the renewable energy power generation device 3 to output at the maximum power, so that the output power P1 of the natural energy power generation device 3 is not suppressed to less than the maximum power P2. , The output power P1 of the renewable energy power generation device 3 can be efficiently supplied to the power system 9.
  • the maximum power detecting means of the power control device 2 detects the maximum power P2 of the predetermined natural energy power generation device 3 among the plurality of natural energy power generation devices 3, so that a large number of natural power generation devices 3 are detected.
  • the maximum power P2 can be easily measured without measuring the maximum power P2 of the energy power generation device 3. It is inferred that the maximum power P2 of the renewable energy power generation device 3 arranged at the same photovoltaic power generation site is similar.
  • the electric power control device 2 reduces the output electric power P1 with respect to the renewable energy power generation apparatus 3 in step S11. Suppression instructions were given. This is to reduce the ratio of the output power P1 of the renewable energy power generation device 3 in the power system 9 and to ensure stable frequency control by power generation devices such as thermal power, hydraulic power, and nuclear power.
  • the electric power reduced by the natural energy output electric power suppression instruction of the target electric power command D1 may be the average electric power in the time zone when the electric power supply and demand is performed.
  • the reduced power is the average power output from the renewable energy power generation device 3.
  • the time zone is a time width corresponding to the time interval in which the supply and demand of electric power is adjusted. The supply and demand adjustment of electric power is performed every time zone such as 30 minutes and 5 minutes.
  • the renewable energy output power suppression instruction of the target power command D1 is an instruction to reduce the average of the output power in the immediately preceding time zone from the average of the output power in the immediately preceding time zone in the power supply and demand adjustment.
  • the output power reduced by the renewable energy output power suppression instruction is the average power output from the renewable energy power generation device 3 in the time zone in the power supply and demand adjustment.
  • the renewable energy output power suppression instruction of the target power command D1 is immediately after it is determined that the power of the power system is less than the predetermined first frequency range in the time zone subject to the natural energy output power suppression instruction. In time, it may include an instruction to increase the output power from the power in the immediately preceding time zone.
  • the frequency f of the electric power in the electric power system 9 is less than f0- ⁇ f1
  • the electric power supplied in the electric power system 9 is insufficient with respect to the demanded electric power, and stable frequency control by a power generation device such as thermal power, hydraulic power, or nuclear power is performed. It is presumed that it has not been done. Therefore, it is preferable to quickly reduce the electric power output from the renewable energy power generation device 3 and quickly increase the electric power output from the power generation devices such as thermal power, hydraulic power, and nuclear power.
  • the power control device 2 instructs the renewable energy power generation device 3 to increase the output power by the target power command D1.
  • the natural energy output power suppression instruction transmitted by the target power command D1 is an instruction to increase the output power from the power in the immediately preceding time zone at a part of the time zone subject to the natural energy output power suppression instruction.
  • the time zone for power supply and demand adjustment is 30 minutes and the target power command D1 is transmitted every 5 minutes
  • the time zone immediately after the power frequency f in the power system 9 becomes less than f0- ⁇ f1.
  • the power control device 2 gives an instruction to the renewable energy power generation device 3 to increase the output power by the target power command D1.
  • the power control device 2 gives the renewable energy power generation device 3 an output in the time zone immediately after the average of the output power in the time zone immediately before in the power supply and demand adjustment by the instruction to suppress the natural energy output power included in the target power command D1. Instruct to reduce the average power.
  • the power control device 2 has an output power of the renewable energy power generation device 3 according to a decrease rate calculated based on an increase rate of the power output from the power generation device connected to the power system 9 excluding the renewable energy power generation device 3. Give instructions to reduce.
  • the power generation device other than the renewable energy power generation device 3 connected to the power system 9 is, for example, a power generation device for thermal power, hydraulic power, nuclear power, or the like.
  • FIG. 10 shows the relationship between the target power P3 transmitted by the target power command D1 to the renewable energy power generation device 3 and the output power P1 of the renewable energy power generation device 3 at each time.
  • the target power command D1 includes a natural energy output power suppression instruction.
  • the time interval for adjusting the supply and demand of electric power is 30 minutes and the cycle in which the target electric power command D1 is transmitted from the electric power control device 2 is 5 minutes will be described. It is assumed that 11:30 to 12:00 is the time zone A and 12:00 to 12:30 is the time zone B in the time interval in which the supply and demand adjustment of electric power is performed.
  • the power control device 2 gives an instruction to the renewable energy power generation device 3 to reduce the average power in the time zone B from the average power in the time zone A by the instruction to suppress the renewable energy output power included in the target power command D1.
  • the arithmetic unit 26 of the electric power control device 2 sends the renewable energy power generation device 3 to the renewable energy power generation device 3.
  • the target power command D1 gives an instruction to output the target power P3b1.
  • the target power P3b1 is a power larger than the output power P1a6 at the time a6 in the time zone A.
  • the calculation unit 26 of the power control device 2 gives an instruction to increase the output power of the renewable energy power generation device 3 from the output power P1a6 to the target power P3b1.
  • the renewable energy power generation device 3 increases the output power in the time b1 of the time zone B from the output power P1a6 to the target power P3b1.
  • the electric power supplied in the electric power system 9 is insufficient with respect to the demanded electric power, and stable frequency control by a power generation device such as thermal power, hydraulic power, or nuclear power is performed. It is presumed that it has not been done. The power output from power generation equipment such as thermal power, hydraulic power, and nuclear power is unlikely to increase rapidly. In order to solve the shortage of the supplied power in the power system 9, the output power of the renewable energy power generation device 3 is temporarily increased in the time b1 of the time zone B.
  • the calculation unit 26 of the power control device 2 instructs the renewable energy power generation device 3 to output the target power P3b2 by the target power command D1.
  • the target power P3b2 is a power less than the output power P1b1 in the time b1 of the time zone B.
  • the calculation unit 26 of the power control device 2 gives an instruction to reduce the output power of the renewable energy power generation device 3 from the output power P1b1 to the target power P3b2.
  • the renewable energy power generation device 3 reduces the output power in the time b2 in the time zone B from the output power P1b1 to the target power P3b2.
  • the calculation unit 26 of the power control device 2 gives an instruction to the renewable energy power generation device 3 to output the target power P3b3 at 12:10, an instruction to output the target power P3b4 at 12:15, and a time 12:20. Is instructed to output the target power P3b5, and is instructed to output the target power P3b6 at 12:25.
  • the renewable energy power generation device 3 sequentially sets the output power in the time zone B to the target power P3b3, the target power P3b4, the target power P3b5, and the target power P3b6.
  • the target power P3B which is the average value of the target power in the time zone B, is less than the average value of the output power output from the renewable energy power generation device 3 in the time zone A.
  • the target power P3B is an average value of the target power P3b1, the target power P3b2, the target power P3b3, the target power P3b4, the target power P3b5, and the target power P3b6 in the time zone B.
  • the power control device 2 instructs the renewable energy power generation device 3 to reduce the average power in the time zone B from the average value of the output power in the time zone A by the instruction to suppress the renewable energy output power included in the target power command D1. I do.
  • the power generation devices such as thermal power, hydraulic power, and nuclear power connected to the power system 9 detect that the frequency f of the power in the power system 9 becomes less than f0- ⁇ f1 at 12:00, and self-control. Increases the output power. It is difficult for power generation devices such as thermal power, hydraulic power, and nuclear power to sharply increase the output power. Power generation devices such as thermal power, hydraulic power, and nuclear power increase the output power so as to reach the target power in, for example, 30 minutes.
  • FIG. 11 shows the relationship between the output power P1 of the renewable energy power generation device 3 and the output power of the power generation devices such as thermal power, hydraulic power, and nuclear power.
  • the renewable energy power generation device 3 reduces the output power, and the power generation devices such as thermal power, hydraulic power, and nuclear power increase the output power.
  • the output power P1 of the renewable energy power generation device 3 is reduced by the decrease rate calculated based on the increase rate of the electric power output from the power generation devices such as thermal power, hydraulic power, and nuclear power connected to the power system 9.
  • the target power P3b1 to the target power P3b6 in the time zone B are calculated so as to have the above-mentioned reduction rate based on the system information B2.
  • the renewable energy output power suppression instruction has a decrease rate calculated based on the increase rate of the electric power output from the power generation devices other than the natural energy power generation device 3 connected to the power system 9.
  • the renewable energy output power suppression instruction includes an instruction to increase the output power from the power in the immediately preceding time zone A in a part of the time b1 of the time zone B subject to the renewable energy output power suppression instruction, the power system The shortage of the power supply in No. 9 can be temporarily solved by the output power of the renewable energy power generation device 3.
  • the renewable energy output power suppression instruction is an instruction to reduce the average power from the output power in the time zone A immediately before in the power supply and demand adjustment. Since the average power output from the renewable energy power generation device 3 in the time zone B in the power supply and demand adjustment is reduced by the renewable energy output power suppression instruction, the output power of the renewable energy power generation device 3 in the power supply of the power system 9 is reduced.
  • the ratio can be decreased and the ratio of the output power of power generation devices such as thermal power, hydraulic power, and nuclear power can be increased.
  • the renewable energy output power suppression instruction indicates the rate of decrease calculated based on the rate of increase in power output from power generation devices such as thermal power, hydraulic power, and nuclear power, excluding the natural energy power generation device 3 connected to the power system 9. Have.
  • the renewable energy power generation device 3 can reduce the output power at a rate of decrease corresponding to the rate of increase of the power output from the power generation devices such as thermal power, hydraulic power, and nuclear power.
  • the shortage of the supplied power in the power system 9 can be alleviated, and stable frequency control by power generation devices such as thermal power, hydraulic power, and nuclear power can be ensured.
  • the electric power system 9 including the renewable energy power generation device 3 can be stably controlled.
  • the output power command means causes the renewable energy power generation device 3 to reduce the output power of the renewable energy output power. Suppression instructions may be given.
  • the calculation unit 26 of the power control device 2 averages the frequencies f of the power system 9 within a predetermined time based on the system information B1 and the system information B2 received in step S03 in step S10 of the program shown in FIG. Is calculated.
  • step S10 the calculation unit 26 of the power control device 2 calculates the average frequency of the power system 9 measured at intervals of several seconds or minutes, starting from 12:00 shown in FIG. 10, for example. Alternatively, the calculation unit 26 of the power control device 2 calculates the average frequency of the power system 9 at 12:00, 12:05, 12:10, and 12:15 shown in FIG.
  • the average frequency may be calculated based on the frequency f within an arbitrary time of several seconds to several minutes. Further, the average frequency may be calculated based on the frequency f of the power system 9 within an arbitrary time over a plurality of time zones.
  • the power control device 2 gives the renewable energy power generation device 3 an instruction to suppress the natural energy output power to reduce the output power, which is a stable power system 9. It may interfere with frequency control.
  • the power control device 2 determines that the average frequency of the power system 9 within a predetermined time is less than the predetermined first frequency f0- ⁇ f1 based on the system information detected by the system information detecting means.
  • the output power command means gives an instruction to suppress the output power to the renewable energy power generation device 3, so that the power system 9 including the renewable energy power generation device 3 is controlled more stably. It is possible to provide a power control system 1 capable of providing a power control system 1.
  • the output power command means naturally reduces the output power to the renewable energy power generation device 3.
  • the energy output power suppression instruction may be given.
  • step S10 of the program shown in FIG. 4 the arithmetic unit 26 of the power control device 2 continues the frequency f of the power system 9 within a predetermined time based on the system information B1 and the system information B2 received in step S03. And observe.
  • step S10 the calculation unit 26 of the power control device 2 continuously observes the frequency f of the power system 9 at intervals of several seconds or minutes, starting from 12:00 shown in FIG. 10, for example.
  • the arithmetic unit 26 of the power control device 2 continuously observes the frequency f of the power system 9 at 12:00, 12:05, 12:10, and 12:15 shown in FIG.
  • the frequency f may be continuously observed at an arbitrary time interval of several seconds to several minutes. Further, the frequency f may be continuously observed over a plurality of time zones.
  • the power control device 2 gives the renewable energy power generation device 3 an instruction to suppress the natural energy output power to reduce the output power, which is a stable power system 9. It may interfere with frequency control.
  • the frequency of the power system 9 within a predetermined time is continuously lower than the predetermined first frequency f0- ⁇ f1 based on the system information detected by the system information detecting means. If it is determined that, the output power command means issues an instruction to suppress the output power to the renewable energy power generation device 3, so that the power system 9 including the renewable energy power generation device 3 can be stably controlled. It is possible to provide a power control system 1 that can be used.
  • the power control device 2 may give the renewable energy power generation device 3 an instruction to suppress the natural energy output power to reduce the output power.
  • f0- ⁇ f1a 49.2 Hz
  • f0- ⁇ f1b 49.1 Hz.
  • the power control device 2 may give the renewable energy power generation device 3 an instruction to suppress the natural energy output power to reduce the output power.
  • the power control device 2 includes power output from a power generation device other than the renewable energy power generation device 3 connected to the power system 9, and renewable energy power generation.
  • the lower limit value f0- ⁇ f1 of the predetermined first frequency range is set.
  • the value is changed to f0- ⁇ f1m, which is larger than the lower limit value f0- ⁇ f1 of the first frequency range, and the power of the power system 9 is less than the changed first frequency range, that is, the frequency f is changed.
  • the output power command means may be used to instruct the renewable energy power generation device 3 to suppress the output power to reduce the output power.
  • the power generation device other than the renewable energy power generation device connected to the power system 9 is, for example, a power generation device for thermal power, hydraulic power, nuclear power, or the like.
  • the thermal power, hydraulic power, nuclear power, and other power generation devices connected to the power system 9 are structurally required to be operated at a certain minimum load power or higher.
  • the minimum electric power that can be output from a power generation device such as thermal power, hydraulic power, or nuclear power is referred to as a minimum load power.
  • the magnitude of the electric power output from the power generation devices such as thermal power, hydraulic power, and nuclear power is obtained by subtracting the power output from the renewable energy power generation device 3 from the required power of the power system 9.
  • power generation devices such as thermal power, hydraulic power, and nuclear power may be required to operate at the minimum load power or less.
  • operating a power generation device such as thermal power, hydraulic power, or nuclear power with a minimum load power or less destabilizes frequency control in the power system 9, and is structurally difficult depending on the power generation device.
  • the renewable energy power generation device is expected to operate in advance. It is preferable to reduce the power output from 3 and increase the power output from power generation devices such as thermal power, hydraulic power, and nuclear power.
  • the power control device 2 includes power output from power generation devices such as thermal power, hydraulic power, and nuclear power, and thermal power, hydraulic power, nuclear power, and the like.
  • the difference from the minimum load power of the power generation device is equal to or less than a predetermined value
  • the lower limit value f0- ⁇ f1 of the first frequency range is larger than the lower limit value f0- ⁇ f1 of the first frequency range.
  • Change to the value f0- ⁇ f1m When the frequency f of the power system 9 becomes less than the changed f0- ⁇ f1m, the power control device 2 instructs the renewable energy power generation device 3 to suppress the natural energy output power to reduce the output power.
  • the center device 8 is installed in a command room such as a power supply command center, a system control center, or a centralized control center.
  • the center device 8 transmits the system information B2, which is the power information of the power system 9, to the power control device 2.
  • the system information B2 also includes information on the output power and the minimum load power of power generation devices such as thermal power, hydraulic power, and nuclear power.
  • the power control device 2 receives the system information B2 and calculates the difference between the power output from the power generation device such as thermal power, hydraulic power, and nuclear power and the minimum load power of the power generation device such as thermal power, hydraulic power, and nuclear power.
  • the calculated difference is referred to as residual power.
  • the power control device 2 sets the lower limit value f0- ⁇ f1 of the first frequency range to the lower limit value f0- ⁇ f1 of the first frequency range. Change to a large value f0- ⁇ f1m.
  • the power control device 2 instructs the renewable energy power generation device 3 to suppress the output power to reduce the output power.
  • the calculation of the remaining power is performed by the power control device 2, but it may be performed by the center device 8.
  • the power control device 2 sets the lower limit value f0- ⁇ f1 of the first frequency range when the surplus power of the power generation device such as thermal power, hydraulic power, nuclear power, etc. becomes equal to or less than a predetermined value.
  • the value is changed to f0- ⁇ f1m, which is larger than the lower limit value f0- ⁇ f1 of the first frequency range.
  • the power control device 2 can be used as a renewable energy power generation device 3 when the remaining power of the power generation device such as thermal power, hydraulic power, nuclear power, etc. becomes low and the frequency f of the power system 9 becomes less than f0- ⁇ f1m in which the frequency f is changed.
  • the ratio of the output power P1 of the renewable energy power generation device 3 in the power system 9 is reduced, and stable frequency control by power generation devices such as thermal power, hydraulic power, and nuclear power is ensured.
  • the maximum power P2 that can be output is measured by the renewable energy power generation device 3 selected by the measurement target selection module M3 in step S01.
  • the maximum power P2 that can be output may be measured by all the renewable energy power generation devices 3.
  • the natural energy power generation device 3 to be measured of the maximum power P2 is selected by the measurement target selection module M3 in step S01.
  • the renewable energy power generation device 3 to be measured for the maximum power P2 selected by the operator may be set and stored in the storage unit 25 in advance as the measurement target selection information E1.
  • the renewable energy power generation device 3 to be commanded by the target power P3 in step S04 may be selected in duplicate with the renewable energy power generation device 3 to be measured by the maximum power P2. did. That is, when the renewable energy power generation device 3 to be measured of the maximum power P2 receives a command to output the target power P3 according to the target power command D1, the maximum power P2 output as the output power P1 is changed to the target power P3. Was required to output.
  • the renewable energy power generation device 3 selected as the command target of the target power P3 by the command target selection module M4 in step S04 may exclude the renewable energy power generation device 3 that is the detection target of the maximum power P2. ..
  • the renewable energy power generation devices 3a and 3d are selected as the measurement targets of the maximum power P2 by the measurement target selection module M3 in step S01, the natural energy power generation devices 3b, 3c and 3e excluding the natural energy power generation devices 3a and 3d, From 3f, the renewable energy power generation device 3 to be commanded by the target power P3 may be selected. It is assumed that the renewable energy power generation devices 3a and 3d, which are the measurement targets of the maximum power P2, always output the output power P1 applied to the maximum power P2.
  • the output power command means of the power control device 2 refers to some of the renewable energy power generation devices 3a to 3f among the plurality of renewable energy power generation devices 3a to 3f, excluding the detection target of the maximum power P2. Since the instruction is instructed to output the output power P1 applied to the target power P3, the renewable energy power generation devices 3a and 3d to be detected by the maximum power P2 can always output the output power P1 applied to the maximum power P2. Since the renewable energy power generation devices 3a and 3d, which are the targets of detection of the maximum power P2, always output the output power P1 applied to the maximum power P2, the maximum power P2 can be easily measured.
  • the renewable energy power generation device 3 incorporates the maximum power measurement module N1 and measures the maximum power P2 that can be output, and the maximum power information A2 that is the information of the maximum power P2 is It is made to be transmitted from the renewable energy power generation device 3 to the power control device 2.
  • the arithmetic unit 26 of the power control device 2 incorporates the maximum power measurement module N1 and sequentially transmits the output voltage of the renewable energy power generation device 3 by transmitting a command to increase or decrease the output power to the renewable energy power generation device 3. It may be changed so that the calculation unit 26 of the power control device 2 measures the maximum power P2 of the renewable energy power generation device 3.
  • step S05 when it is determined in step S05 that the frequency f is within the range of the predetermined frequency ⁇ f2, the power control device 2 issues the target power command D1 to the renewable energy power generation device 3. It is assumed that the output power P1 is instructed to be the maximum power P2. However, regardless of whether the frequency f is within the predetermined frequency ⁇ f2 without having step S05 and step S06, the power control device 2 sends the renewable energy power generation device 3 to the target power command D1. An instruction to set the output power P1 to the maximum power P2 may be transmitted.
  • the system information B1 is received from the power measuring devices 4a and 4d connected to the renewable energy power generation devices 3a and 3d selected by the measurement target selection module M3 in step S01.
  • the system information B1 is transferred to the power control device 2 from the power measurement devices 4a to 4f arranged in each of the renewable energy power generation devices 3a to 3f, or from the power measurement device 4 arbitrarily selected from the power measurement devices 4a to 4f. It may be sent.
  • the power measuring devices 4a to 4f are electrically connected and arranged in each of the renewable energy power generation devices 3a to 3f, but the power measuring device 4 is a plurality of renewable energy power generation devices. It may be electrically connected and arranged in a part of 3.
  • the power measuring devices 4a and 4d may be arranged only in the renewable energy power generation devices 3a and 3d selected in advance from the plurality of natural energy power generation devices 3a to 3f, respectively. .. With this configuration, the number of power measuring devices 4 in the power control system 1 can be reduced.
  • a plurality of renewable energy power generation devices 3a to 3f are connected to one power control device 2 via a communication line 5b.
  • one renewable energy power generation device 3 may be connected to one power control device 2.
  • the power control device 2 is provided as a device separate from the renewable energy power generation device 3.
  • the power control device 2 may be integrally configured with the renewable energy power generation device 3.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

L'invention concerne un système de commande d'alimentation, un dispositif de commande d'alimentation, un programme informatique de commande d'alimentation, et un procédé de commande d'alimentation qui peuvent commander de manière stable un système d'alimentation comprenant un dispositif de génération d'alimentation en énergie naturelle.　Ce système de commande d'alimentation (1) comprend : un dispositif de génération d'alimentation en énergie naturelle (3) qui génère une alimentation électrique à l'aide d'énergie naturelle ; et un dispositif de commande d'alimentation (2) pourvu d'un moyen de détection d'alimentation maximale destiné à détecter une alimentation maximale délivrée par le dispositif de génération d'alimentation en énergie naturelle, d'un moyen de détection d'informations de système destiné à détecter des informations de système concernant un système d'alimentation (9), et d'un moyen de commande d'alimentation de sortie destiné à calculer et ordonner une alimentation de sortie devant être délivrée par le dispositif de génération d'alimentation en énergie naturelle (3) sur la base de l'alimentation maximale détectée et des informations de système détectées, où, lorsque la fréquence de l'alimentation provenant du système d'alimentation (9) est déterminée comme étant inférieure à une première plage de fréquences prédéterminée sur la base des informations de système détectées par le moyen de détection d'informations de système, le moyen de commande d'alimentation de sortie ordonne au dispositif de génération d'alimentation en énergie naturelle (3) de supprimer l'alimentation de sortie d'énergie naturelle afin de réduire l'alimentation de sortie.
PCT/JP2020/047239 2019-12-20 2020-12-17 Système de commande d'alimentation, dispositif de commande d'alimentation, programme informatique de commande d'alimentation, et procédé de commande d'alimentation WO2021125287A1 (fr)

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JPPCT/JP2019/050160 2019-12-20
PCT/JP2019/050160 WO2021124567A1 (fr) 2019-12-20 2019-12-20 Système de commande de puissance, dispositif de commande de puissance, programme informatique pour commander la puissance, et procédé de commande de puissance

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PCT/JP2020/047239 WO2021125287A1 (fr) 2019-12-20 2020-12-17 Système de commande d'alimentation, dispositif de commande d'alimentation, programme informatique de commande d'alimentation, et procédé de commande d'alimentation

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JP2011060921A (ja) * 2009-09-08 2011-03-24 Tokyo Electric Power Co Inc:The 太陽光発電設備
US20110210613A1 (en) * 2010-02-26 2011-09-01 General Electric Company Power generation frequency control
JP2014241678A (ja) * 2013-06-11 2014-12-25 富士電機株式会社 電力調整装置、電力調整システム、プログラム
JP2015201900A (ja) * 2014-04-03 2015-11-12 株式会社東芝 ウィンドファームの出力制御装置、方法、及びプログラム
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