JP5306286B2 - Power supply system control method and power supply system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently control distributed power supplies connected to a power system. <P>SOLUTION: In each distributed power supply 3, a first measurement and command device 10 performing measurement and control of each distributed power supply 3 is arranged. The first measurement and command device 10 receives a total value of power generation which is a sum of power outputs of the distributed power supplies 3 in the power system 2 from the other first measurement and command devices 10, obtains a current frequency of the power system 2, obtains occasionally a current output of own machine which is the current output of the distributed power supply 3 for which it has own responsibility, calculates an area requiring power amount based on the obtained frequency and the total value of power generation and allocates it to each distributed power supply 3, generates a command value for the distributed power supply 3 for which it has own responsibility based on the allocated value of the distributed power supply 3 for which it has own responsibility and the obtained current output of own machine, controls power output according to the generated command value, calculates the total value of power generation by adding the obtained current output of own machine to the received total value of power generation, and transmits the total value of power generation to the other first measurement and command devices 10. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to a power supply system control method and a power supply system, and more particularly to a technique for efficiently controlling a distributed power source connected to a power system.

  Recently, a small-scale power system (hereinafter referred to as a microgrid) configured to combine a plurality of distributed power sources and power storage systems and control the amount of power generated by the distributed power sources according to demand has attracted attention.

  For example, Patent Document 1 discloses, for each of a plurality of distributed power sources, an arithmetic device, a measurement device that measures and acquires the output of the distributed power source or the frequency of the power system connected to the distributed power source, and the output of the distributed power source. And a control device for controlling each of the calculation devices, each measurement unit obtains a measurement value of each distributed power source from each measurement device, generates a command value of its own distributed power source based on all the measurement values, and generates A control method for a power supply system is described in which a command value is input to a control device, and the control device controls its own distributed power source according to the command value.

  In Patent Document 2, a switch agent placed in a section switch is an initiator in a section separated by a section switch of the power system, and an agent placed in a generator or load and a downstream switch in the section is referred to as Patent Document 2. A control system for a distributed power source is described in which a Responder is used to make a power supply / demand contract between these agents using a contract net protocol to perform a distributed power supply in a section and a load and supply / demand control in a downstream section.

  In Patent Document 3, a section agent placed in any one of a generator, a load, and a downstream switch in a section separated by a section switch of a power system is called an initiator, and the generator, load, and downstream in the section The agent placed on the side switch is the Responder, and contracts for power supply and demand are made between these agents using the contract net protocol.The section agent grasps the tidal flow, and the tidal current increase / decrease amount to the generator agent or the downstream section agent. The generator agent or the downstream section agent autonomously repeats the chain of coordination with other generator agents or downstream section agents, respectively, so that the distributed power supply in the section and the supply and demand control of the downstream section are controlled. A power system control system is described.

JP 2009-278834 A JP 2008-301641 A JP 2009-159808 A

  When the arithmetic unit attached to the distributed power source is configured to acquire the measurement value by communicating with the measuring device attached to the other distributed power source as in Patent Document 1 above, If the number increases, the amount of communication will inevitably increase, and the processing speed of the computing device may decrease and data may be lost during communication, affecting the control of distributed power sources connected to the power system. give.

  The present invention has been made in view of such a background, and provides a power supply system control method and a power supply system capable of efficiently and reliably controlling a distributed power source connected to an electric power system. For the purpose.

  In order to achieve the above object, one aspect of the present invention is a method for controlling a power supply system including a plurality of distributed power sources, and is responsible for each measurement and control of each of the distributed power sources. A first measurement commanding device, wherein the first measurement commanding device measures the frequency of the power system to which the distributed power source is connected and the output of the distributed power source that each takes charge of A control device that controls the output of the distributed power source that each takes charge of, and each of the first measurement command devices is communicably connected to each other, and the first measurement command device is connected to the distribution system in the power system. The total power generation value that is the sum of the outputs of the power sources is received from the other first measurement command device, the current frequency of the power system is obtained, and the current output of the distributed power source that it is responsible for Obtain the current output of the aircraft at any time Determining the current frequency deviation based on the acquired frequency and a reference frequency in the power system, and multiplying the frequency deviation by a value obtained by multiplying the frequency deviation by a system frequency characteristic constant and the total power generation amount Determining and distributing the determined regional demand to each of the distributed power sources according to a predetermined distribution condition, the distributed power distribution value that the local power is responsible for among the regional demands, and the acquired current output of the own device Based on the above, the command value for controlling the output of the distributed power source that is in charge of itself is generated, the output of the distributed power source that is in charge of itself is controlled according to the generated command value, and the total amount of power generation received The power generation amount total value is obtained by adding the acquired current output of the own device to the value, and the obtained power generation amount total value is transmitted to the other first measurement command device.

  As described above, in the present invention, the first measurement command device measures and acquires the current frequency of the power system and the current output of its own device, and generates the total amount of power generation that is the total output of the distributed power sources in the power system. The value is acquired from the other first measurement command device, and thereby the command value of the distributed power source that it is in charge of is generated. Thus, since the 1st measurement command device of the present invention acquires only the total amount of electric power generation from other measurement command devices, it can prevent congestion of the communication network which connects between measurement command devices, and processing of a measurement command device It is possible to prevent a decrease in speed and data loss during communication. As a result, the distributed power source connected to the power system can be controlled efficiently and reliably.

  Another aspect of the present invention is a control method for the power supply system, wherein the first measurement command device holds the acquired current output of the own device upon the transmission of the total power generation value, and newly When the absolute value of the difference between the acquired current output of the own device and the current output of the own device stored at the previous transmission of the total amount of power generation exceeds a predetermined threshold, the other first measurement The power generation amount total value is obtained by adding the newly acquired current output to the power generation amount total value received from the command device, and the calculated power generation amount total value is transmitted to the other first measurement command device. I will do it.

  According to the present invention, the measurement command device obtains the total power generation value and transmits it to the other measurement command devices only when the change amount of the current output of the own machine exceeds a predetermined threshold value. Can be prevented from being transmitted unnecessarily, and the amount of communication between the measurement command devices can be kept within a necessary range.

  Another aspect of the present invention is a method for controlling the power supply system, wherein the first measurement command device is currently requesting a transmission right that is an authority to transmit the total amount of power generation in the power system, or While transmitting a transmission right signal, which is a signal indicating that it is being acquired, to the other first measurement command device, and waiting for reception of the transmission right signal sent from the other first measurement command device, When the transmission right signal is not received within a predetermined time, the power generation amount total value is obtained by adding the acquired current output to the received power generation amount total value, and the obtained power generation amount total value is To the first measurement command device.

  According to the present invention, the first measurement command device transmits the total power generation value to the other measurement command devices after confirming that the first measurement command device has the right to transmit, so the total power generation value from the plurality of measurement command devices. Can be surely prevented from competing. In addition, the power generation amount total value is not transmitted unnecessarily, and congestion of the communication network connecting the measurement command devices can be prevented.

  Another aspect of the present invention is a control method for the power supply system, wherein the distribution condition is a condition that the regional requirement amount is evenly distributed to each of the distributed power sources, and the regional requirement amount is Any one of a condition of allocating according to a change speed of each output of the distributed power supply and a condition of allocating the regional requirement amount according to the economic efficiency of each of the distributed power supplies. And

  According to the present invention, it is possible to appropriately distribute regional demands to each distributed power source based on the performance, configuration, and economics of the power supply system such as the number of distributed power sources, the rate of change in output, and the economy.

  Another aspect of the present invention is a method for controlling the power supply system, wherein a distributed power source that cannot perform output control is connected to the power system, and the power control cannot be performed. The distributed power supply is provided with a second measurement command device including an arithmetic device and a measurement device for measuring the output of the distributed power supply, and the second measurement command device is connected to the other second measurement command device and the The second measurement command device is connected to the first measurement command device so that they can communicate with each other, and the second measurement command device sets the total power generation amount that is the total output of the distributed power source in the power system to the other second measurement command devices and the Received from the first measurement command device, obtains the current output of the own device, which is the current output of the distributed power source that it is responsible for, and adds the obtained current output of the own device to the received power generation total value. To obtain the total power generation value. And the power generation amount total value is to be transmitted to the other second measurement instruction device and the first measurement instruction unit.

  According to the present invention, even when a distributed power source of a type that cannot perform output control and a distributed power source of a type that can perform output control are mixed in the power system, each of the measurement command devices is connected to the current power system. The frequency and current output of the machine itself are measured and acquired, and the total amount of power generation, which is the total output of the distributed power supply in the power system, is obtained from other measurement command devices and the command of the distributed power supply that is in charge of itself. A configuration for generating a value can be realized, and even in such a configuration, a configuration for performing autonomous control of a distributed power source while suppressing the amount of communication between measurement command devices can be realized. .

  In addition, the subject which this application discloses, and its solution method are clarified by the column of the form for inventing, and drawing.

  ADVANTAGE OF THE INVENTION According to this invention, the distributed power supply connected to the electric power grid | system can be controlled efficiently and reliably.

1 is a schematic configuration diagram of a power supply system 1. FIG. 1 is a diagram illustrating a configuration of a measurement command device 10. FIG. 2 is a diagram illustrating a hardware configuration of an arithmetic device 11. FIG. 2 is a diagram illustrating a hardware configuration of a measuring device 12. FIG. 2 is a diagram illustrating a hardware configuration of a control device 13. FIG. 3 is a diagram illustrating functions of the arithmetic device 11. FIG. It is a figure which shows the structure of the record stored in the measured value database. It is a flowchart explaining generator control processing S600. It is a figure explaining the process which produces | generates the command value in S614. It is a figure which shows the structure of the measurement instruction | command apparatus 10 attached to the distributed power supply 3 of the type which cannot perform output control. The function with which the arithmetic unit 11 shown in FIG. 8 is provided is shown. It is a flowchart which shows the detail of electric power generation amount total value transmission process S1000.

Hereinafter, embodiments will be described in detail with reference to the drawings.
FIG. 1 shows a schematic configuration of a power supply system 1 described as an embodiment. As shown in the figure, the power supply system 1 includes a plurality of distributed power sources 3 (G1, G2, G3...) And a distributed power source 3 connected to a small power system 2 such as a microgrid. It is configured to include a measurement command device 10 (first measurement command device) provided in parallel and one or more loads 4 connected to the power system 2.

  The distributed power source 3 includes, for example, a cogeneration generator (diesel generator, gas turbine generator, gas engine generator, etc.), a generator using natural energy or unused energy (wind generator, solar generator, Small hydroelectric generators, waste generators, biomass generators, etc.).

  Each measurement command device 10 is connected to be communicable with each other via a communication network 50. The communication network 50 is, for example, the Internet or a dedicated line (power system control information transmission system (CDT: Cyclic Digital data Transmission equipment), metal line, optical fiber, or the like).

  FIG. 2 shows the configuration of the measurement command device 10. As shown in FIG. 1, each measurement command device 10 includes a calculation device 11, a measurement device 12, and a control device 13. Among these, the measuring device 12 acquires the current frequency of the power system 2 and the current output of the distributed power source 3 (hereinafter referred to as “generator output”), and the acquired frequency and generator output to the arithmetic device 11. input.

  The computing device 11 is the sum of the frequency and generator output input from the measuring device 12 and the output of the distributed power source 3 in the power system 2 acquired via the communication network 50 (hereinafter referred to as the total amount of power generation). And a command value for controlling the output of the distributed power source 3 is generated, and the generated command value is input to the control device 13.

  The control device 13 controls the output of the distributed power source 3 according to the command value input from the arithmetic device 11.

  FIG. 3A shows a hardware configuration (block diagram) of the arithmetic unit 11. As shown in the figure, the arithmetic unit 11 displays a CPU 111, a memory 112 such as a RAM / ROM, a storage device 113 such as a hard disk, an input device 114 such as a keyboard and a mouse, measurement values, control values, command values, and the like. A display device 115 such as a liquid crystal display, a communication device 116 that communicates with another measurement command device 10 via the communication network 50, and communicates with the measurement device 12 and the control device 13, and an RTC. It is configured using (Real Time Clock) or the like, and includes a time measuring device 117 (radio clock or the like) that generates date and time information (time stamp) such as the current date and time. Note that the computing device 11 is realized by using an information processing device such as a personal computer, for example.

  FIG. 3B shows a hardware configuration (block diagram) of the measuring device 12. As shown in the figure, the measurement device 12 is a CPU 121, a memory 122, a communication device 123 that communicates with the arithmetic device 11, and a measurement that acquires the frequency of the small-scale power system 2 and the output of the distributed power source 3. A circuit 124 is provided.

  FIG. 3C shows a hardware configuration (block diagram) of the control device 13. As shown in the figure, the control device 13 controls the output of the distributed power supply 3 in accordance with a command value input from the CPU 131, the memory 132, the communication device 133 that communicates with the arithmetic device 11, and the arithmetic device 11. A control circuit 134 is provided.

  FIG. 4 shows functions included in the arithmetic device 11. As shown in the figure, the calculation device 11 includes a frequency acquisition unit 411, a self-machine output acquisition unit 412, a power generation total value reception unit 413, a regional request amount calculation unit 416, a filter processing unit 417, a distribution processing unit 418, a command Value input unit 419, power generation amount total value transmission unit 421, transmission own device current output storage unit 422, output change amount determination unit 423, power generation amount total value transmission right signal transmission unit 424, and power generation amount total value transmission right signal reception Each function of the unit 425 is provided. These functions are realized by the hardware of the arithmetic device 11 or when the CPU 111 executes a program stored in the memory 112 or the storage device 113.

  The arithmetic device 11 includes a measurement value database 431. The measurement value database 431 is realized by a DBMS (Data Base Management System) or the like that operates in the arithmetic device 11.

  Among the functions shown in FIG. 4, the frequency acquisition unit 411 acquires a frequency (frequency of the power system 2) that is input from the measurement device 12 as needed, and associates the acquired frequency with an acquisition date (time stamp) to obtain a measurement value. Store in the database 431.

  The own device output acquisition unit 412 measures the current generator output of the distributed power source 3 (hereinafter referred to as “own device”), which is input from time to time by the measuring device 12 and is handled by the measuring device 12 of the measurement commanding device 10. Then, the measured generator output (hereinafter referred to as “own machine current output”) is stored in the measurement value database 431 in association with the measurement time (time stamp).

  The power generation amount total value receiving unit 415 receives and stores the power generation amount total value sent from the other measurement command device 10.

  The regional requirement amount calculation unit 416 is based on the frequency acquired by the frequency acquisition unit 411 (hereinafter referred to as the current frequency) and the power generation amount total value received by the power generation amount total value reception unit 413. (Area Requirement) Here, the regional requirement amount AR is an amount representing the supply-demand difference (demand and supply imbalance) of the power system 2, and in the present embodiment, the current frequency and the reference frequency (for example, 50 Hz (Kanto) or 60 Hz (Kansai)). The regional requirement amount AR is a value obtained by multiplying the value obtained by multiplying the difference between the two (hereinafter referred to as frequency deviation ΔF) by the system frequency characteristic constant K and the total power generation amount.

  The filter processing unit 417 performs a smoothing process for removing an extremely short period component included in the area request quantity AR and a dead band process for removing a fine movement component for the area request quantity AR obtained by the area request quantity calculation unit 416. .

  The distribution processing unit 418 distributes the regional request amount AR obtained by the regional request amount calculation unit 416 to each distributed power source 3 connected to the power system 2 according to a predetermined distribution condition. As the distribution condition, for example, the regional requirement amount AR is evenly distributed to each distributed power source 3, that is, the regional requirement amount AR is divided into 1 / (the distributed power source 3 in operation connected to the power system 2). The regional requirement amount AR is set according to the condition (hereinafter referred to as the first condition) that the value obtained by multiplying the total number of units) is distributed to each distributed power source 3 (hereinafter referred to as the first condition) and the change rate of the generator output of each distributed power source 3. Distribute to distributed power source 3, that is, multiply regional demand AR by (change speed of distributed power source 3) / (total change speed of distributed power source 3 connected to power system 2) The regional demand AR is distributed to each distributed power source according to the condition that the distributed value is distributed to each distributed power source 3 (hereinafter referred to as the second condition) and the economics (cost advantage) of each distributed power source 3. Distribution to the power supply 3, that is, the regional requirement AR, (the economic factor of the distributed power supply 3) / (electricity There is a condition (hereinafter referred to as a third condition) in which a value obtained by multiplying the distributed power sources 3 connected to the grid 2 by a value obtained by multiplying the economic coefficients of the distributed power sources 3 in operation)) is multiplied. .

  The command value input unit 419 is in charge of the measurement command device 10 by adding the current output of the own device to the regional request amount AR distributed to the distributed power source 3 that is handled by the measurement command device 10 by the distribution processing unit 418. A command value for controlling the output of the distributed power source 3 (for example, an LFC control amount (LFC: Load Frequency Control) obtained by PID calculation (Proportional Integral Differential)) is generated, and the generated command value is controlled. Input to the device 13.

  The power generation amount total value transmission unit 421 adds the current power output acquired by the own device output acquisition unit 412 to the power generation amount total value received by the power generation amount total value reception unit 413 to obtain the latest power generation amount total value. Then, the obtained power generation amount total value is transmitted to the other measurement command device 10.

  The transmission-time own-machine current output storage unit 422 stores the own-machine current output (hereinafter referred to as a transmission-time own-machine current output Po) at the time point when the power generation amount total value transmission unit 421 transmits the latest power generation amount total value. To do.

  The output change amount determination unit 423 determines whether the absolute value of the difference between the newly acquired own device current output and the transmission own device current output stored in the transmission own device current output storage unit 422 exceeds a threshold value. Judge whether or not.

  The power generation amount total value transmission right signal transmission unit 424 performs another measurement on a transmission right signal that is a signal indicating that a transmission right that is an authority to transmit the power generation total value in the power system 2 is currently being requested or acquired. Transmit to command device 10.

  The power generation amount total value transmission right signal receiving unit 425 receives a transmission right signal transmitted from another measurement instruction device 10.

  FIG. 5 shows a configuration of records stored in the measurement value database 431. As shown in the figure, the record stored in the measurement value database 431 includes items of a measurement value type 4311, a measurement value 4313, and an acquisition date 4314.

  Among these, the measurement value type 4311 is set to a value indicating whether the measurement value set in the record is the frequency of the power system 2 or the output of the distributed power source 3 (generator output). . In the measurement value 4313, a measurement value (frequency or generator output) is set. In the acquisition date 4314, the measurement date (time stamp) of the measurement value is set.

  FIG. 6 shows details of a process (hereinafter referred to as a generator control process S600) performed by the measurement command device 10. Hereinafter, the generator control process S600 will be described with reference to FIG.

  First, the measurement command device 10 acquires the current frequency of the power system 2 and the current output of the own device (S611).

  Next, the measurement command device 10 determines whether or not a new power generation amount total value Pt has been newly received from another measurement command device 10 (S612). If a new power generation amount total value Pt has been received (S612: YES) The received new power generation amount total value Pt is stored (S613).

  Next, the measurement command device 10 generates a command value for controlling the own device using the stored new power generation total value Pt (S614), and controls the own device according to the generated command value (S615). Details of the processing of S614 will be described later.

  Next, the measurement command device 10 acquires the own device current output Pn (S621), the acquired own device current output Pn, and the transmission own device current output Po stored in the transmission own device current output storage unit 422. The absolute value ΔP = | Po−Pn | of the difference between the two is obtained (S622).

  Next, the measurement command device 10 determines whether or not the obtained ΔP exceeds a preset threshold value b (S623). When ΔP exceeds a preset threshold value b (S623: YES), the process proceeds to S631, and when it does not exceed (S623: NO), the process proceeds to S632.

  In S <b> 631, the measurement command device 10 determines whether or not a transmission right signal is currently received from another measurement command device 10. If the transmission right signal is currently received (S631: YES), the process proceeds to S635. If the transmission right signal is not received (S631: NO), the process proceeds to S632.

  In S635, the measurement instruction device 10 waits for a predetermined time, and then returns to S611.

  In S632, the measurement command device 10 transmits a transmission right signal to all other measurement command devices 10.

  After transmitting the transmission right signal, the measurement command device 10 avoids contention of transmission rights with other measurement command devices 10 (contention of transmission of the total amount of power generation from the plurality of measurement command devices 10). Reception of a transmission right signal from another measurement commanding apparatus 10 is waited for a predetermined time (S633). If a transmission right signal is received from another measurement commanding apparatus 10 (S634: YES), the process proceeds to S635.

  When a transmission right signal is not received from another measurement commanding apparatus 10 within a predetermined time (S634: NO), the process proceeds to S641.

  In S641, the measurement command device 10 obtains the latest power generation amount total value Pt by adding the current power output Pn acquired in S621 to the power generation amount total value Pt received and stored. In addition, since the power generation amount total value (the power generation amount total value transmitted last time in S643 described later) transmitted from the measurement command device 10 to another measurement command device 10 includes the generator output of the own device, S613. The power generation total value Pt sent from the other measurement commanding device 10 stored in the above includes the generator output of the own machine. Therefore, at the time of the addition, it is necessary to subtract the current output Po at the time of transmission from the latest total power generation value Pt, and the measurement command device 10 sets the latest total power generation value Pt at S641 as Pt = Pt + Pn−Po. Ask.

  Next, the measurement commanding apparatus 10 updates the value of the transmission own machine current output Po stored in the transmission own machine current output storage unit 422 to the own machine current output Pn acquired in S621 (S642).

  Next, the measurement command device 10 transmits the power generation amount total value Pt obtained in S641 to the other measurement command device 10 (S643).

  FIG. 7 is a diagram illustrating the process of generating the command value in S614 of FIG. Hereinafter, it will be described with reference to FIG.

  First, the measurement command device 10 obtains an area requirement AR (Area Requirement) based on the frequency acquired in S611 of FIG. 6 and the total power generation value Pt stored in S613 (S711 to S714).

  Next, the measurement command device 10 performs filtering processing, that is, smoothing processing for removing an extremely short period component included in the regional request amount AR, and dead zone processing for removing a fine movement component for the obtained regional request amount AR ( S715).

  Next, the measurement command device 10 distributes the regional request amount AR after the filtering process to each distributed power source 3 connected to the power system 2 in accordance with the predetermined distribution condition described above (S716).

  Next, the measurement command device 10 adds its current output to the regional request amount AR distributed to the distributed power source 3 that the measurement command device 10 is in charge of and the distributed command power source 3 that is in charge of the measurement command device 10. A command value for controlling the output is generated, and the generated command value is input to the control device 13 (S717).

  As described above, according to the power supply system 1 of the present embodiment, the measurement command device 10 measures and acquires the current frequency of the power system 2 and the current output of the own device by itself. The total amount of power generation that is the total output of the distributed power source 3 is obtained from another measurement command device 10 and generates a command value for the distributed power source 3 that it is responsible for. According to this, congestion of the communication network connecting the measurement command devices 10 can be prevented, and a decrease in the processing speed of the measurement command devices 10 and loss of data during communication can be prevented. According to this, the autonomous control of the distributed power source 3 can be appropriately performed while suppressing communication traffic performed between the measurement command devices 10, and the distributed power source 3 can be controlled efficiently and reliably.

  Moreover, the measurement command apparatus 10 calculates | requires a power generation amount total value, and transmits to another measurement command apparatus 10, only when the variation | change_quantity of an own apparatus present output exceeds the predetermined threshold value. For this reason, it is possible to prevent the transmission of the total power generation amount from being performed unnecessarily, and it is possible to minimize the communication amount between the measurement command devices 10.

  Moreover, since the measurement command device 10 confirms that it has the right to transmit, the power generation amount total value is transmitted to the other measurement command devices 10, so that the power generation amount total value is simultaneously transmitted from the plurality of measurement command devices 10. Can be surely prevented.

  By the way, there may be a case where a distributed power source 3 of a type incapable of output control is connected to the electric power system 2 such as a generator using natural energy. Therefore, such a distributed power source 3 is provided with a measurement command device 10 having a configuration described below so that the total amount of power generation is exchanged with other measurement command devices 10.

  FIG. 8 shows the configuration of a measurement command device 10 (second measurement command device) attached to a distributed power source 3 of a type that cannot perform output control. As shown in the figure, the measurement command device 10 does not perform output control, and therefore does not include the control device 13. Moreover, the measuring device 12 does not acquire the frequency of the power system 2.

  FIG. 9 shows the functions of the arithmetic device 11 shown in FIG. As shown in the figure, the calculation device 11 includes a self-machine output acquisition unit 412, a total power generation value reception unit 413, a total power generation value transmission unit 421, a self-machine current output storage unit 422 at the time of transmission, and an output change amount determination unit. 423, the power generation amount total value transmission right signal transmission unit 424, and the power generation amount total value transmission right signal reception unit 425 are provided. The arithmetic device 11 includes a measurement value database 431.

  FIG. 10 shows details of a process performed by the measurement command device 10 shown in FIG. 8 (hereinafter referred to as a total power generation value transmission process S1000). As shown in the figure, unlike the generator control process S600 of FIG. 6, the total power generation value transmission process S1000 does not include processes related to the control of the distributed power supply 3, and other processes are common. That is, the processing of S1012 to S1013 in the figure is the same as S612 to S613 of FIG. The processing of S1021 to S1043 is the same as S621 to S643 of FIG.

  As described above, in the power supply system 1 of the present embodiment, even when the power system 2 includes a distributed power source 3 that cannot perform output control and a distributed power source 3 that can perform output control. Each of the commanding devices 10 measures and acquires the current frequency of the power system 2 and the current output of the own device by itself, and the total amount of power generation that is the total output of the distributed power source 3 in the power system 2 is the other measurement command. It is possible to realize a configuration in which a command value of the distributed power source 3 that is acquired from the device 10 and is in charge of the device 10 is generated. For this reason, even when a distributed power source 3 that cannot perform output control and a distributed power source 3 that can perform output control coexist in the power system 2, the distributed power source 3 while suppressing the amount of communication between the measurement command devices 10. The structure which performs autonomous control of can be implement | achieved.

  Embodiment described above is for making an understanding of this invention easy, and does not limit this invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Electric power supply system 2 Electric power system 3 Distributed type power supply 4 Load 10 Measurement command apparatus 11 Arithmetic apparatus 12 Measuring apparatus 13 Control apparatus 50 Communication network 411 Frequency acquisition part 412 Self-machine output acquisition part 413 Power generation amount total value reception part 416 Area requirement amount Calculation unit 417 Filter processing unit 418 Distribution processing unit 419 Command value input unit 421 Power generation amount total value transmission unit 422 Transmitting device current output storage unit 423 Output change amount determination unit 424 Power generation amount total value transmission right signal transmission unit 425 Power generation amount Total value transmission right signal receiving unit 431 Measurement value database S600 Generator control processing S1000 Power generation amount total value transmission processing

Claims (6)

A method for controlling a power supply system including a plurality of distributed power sources,
Each of the distributed power sources is provided with a first measurement command device that takes charge of each measurement and control,
The first measurement commanding device includes an arithmetic device, a frequency measuring system connected to a distributed power source, and a measuring device that measures the output of the distributed power source that each takes charge of, and the distributed power source that each takes charge of. And a control device for controlling the output of
Each of the first measurement command devices is connected to be communicable with each other,
The first measurement command device includes:
Receiving the total amount of power generation that is the sum of the outputs of the distributed power source in the power system from the other first measurement command device;
Obtaining the current frequency of the power grid;
Acquires the current output of the machine itself, which is the current output of the distributed power source that it is in charge of,
Find the current frequency deviation based on the acquired frequency and the reference frequency in the power system,
By multiplying the frequency deviation by a value obtained by multiplying the frequency deviation by a system frequency characteristic constant and the total power generation value, a regional requirement amount is obtained.
Distributing the obtained regional demand to each distributed power source according to a predetermined distribution condition,
Generates a command value for controlling the output of the distributed power source that is in charge of itself based on the distribution value of the distributed power source that is in charge of the regional demand and the acquired current output of the own device. ,
Control the output of the distributed power source that it is responsible for according to the generated command value,
Adding the acquired current output to the received power generation total value to obtain a power generation total value, and transmitting the calculated power generation total value to the other first measurement command device ;
While transmitting a transmission right signal, which is a signal indicating that the right to transmit the power generation total value in the power system is currently requested or being acquired, to the other first measurement command device, and Waiting for reception of the transmission right signal sent from the other first measurement commanding device, and not receiving the transmission right signal within a predetermined time, the own device current acquired in the received power generation amount total value A power supply system control method , comprising: adding power to determine a total power generation value, and transmitting the calculated total power generation value to the other first measurement command device . It is a control method of the electric power supply system according to claim 1,
The first measurement command device includes:
Holding the acquired current output of the own device at the time of the transmission of the total power generation value,
When the absolute value of the difference between the newly acquired current output and the current output stored in the previous transmission of the total power generation value exceeds a predetermined threshold, the other The power generation amount total value is obtained by adding the newly acquired current output to the power generation amount total value received from one measurement command device, and the obtained power generation amount total value is sent to the other first measurement command device. A method for controlling a power supply system, comprising: transmitting. It is a control method of the electric power supply system according to claim 1,
The allocation condition is
A condition for equally distributing the regional demand to each of the distributed power sources;
A condition that the regional demand is distributed according to the rate of change of the output of each of the distributed power sources;
as well as,
A condition of allocating the regional demand according to the economics of each of the distributed power sources;
A method for controlling a power supply system, wherein the power supply system is any one of the above. It is a control method of the electric power supply system according to claim 1,
A distributed power source that cannot perform output control is connected to the power system,
A second measurement command device including an arithmetic device and a measurement device that measures the output of the distributed power source is attached to the distributed power source that cannot perform output control,
The second measurement command device is connected to the other second measurement command device and the first measurement command device so that they can communicate with each other.
The second measurement command device is
Received from the other second measurement command device and the first measurement command device a power generation amount total value that is the total output of the distributed power source in the power system,
Acquires the current output of the machine itself, which is the current output of the distributed power source that it is in charge of,
The acquired current output is added to the received power generation total value to obtain a power generation total value, and the calculated power generation total value is sent to the other second measurement command device and the first measurement command device. A method for controlling a power supply system, comprising: transmitting. A power supply system configured to include a plurality of distributed power sources,
Provided in each of the distributed type power supply, comprising a first measurement command device in charge of each measurement and control,
The first measurement commanding device includes an arithmetic device, a frequency measuring system connected to a distributed power source, and a measuring device that measures the output of the distributed power source that each takes charge of, and the distributed power source that each takes charge of. A control device for controlling the output of
Each of the first measurement command devices is connected to be communicable with each other,
The first measurement command device is
Receiving the total amount of power generation that is the sum of the outputs of the distributed power source in the power system from the other first measurement command device;
Obtaining the current frequency of the power grid;
Acquires the current output of the machine itself, which is the current output of the distributed power source that it is responsible for
Find the current frequency deviation based on the acquired frequency and the reference frequency in the power system,
By multiplying the frequency deviation by a value obtained by multiplying the frequency deviation by a system frequency characteristic constant and the total power generation value, a regional requirement amount is obtained.
Distributing the obtained regional demand to each distributed power source according to a predetermined distribution condition,
Generates a command value for controlling the output of the distributed power source that is in charge of itself based on the distribution value of the distributed power source that is in charge of the regional demand and the acquired current output of the own device. ,
Control the output of the distributed power source that it is responsible for according to the generated command value,
Adding the acquired current output to the received power generation total value to obtain a power generation total value, and transmitting the calculated power generation total value to the other first measurement command device ;
While transmitting a transmission right signal, which is a signal indicating that the right to transmit the power generation total value in the power system is currently requested or being acquired, to the other first measurement command device, and Waiting for reception of the transmission right signal sent from the other first measurement commanding device, and not receiving the transmission right signal within a predetermined time, the own device current acquired in the received power generation amount total value A power supply system characterized in that an output is added to determine a total power generation value, and the calculated total power generation value is transmitted to the other first measurement command device . The power supply system according to claim 5,
The first measurement command device includes:
Holding the acquired current output of the own device at the time of the transmission of the total power generation value,
When the absolute value of the difference between the newly acquired current output and the current output stored in the previous transmission of the total power generation value exceeds a predetermined threshold, the other The power generation amount total value is obtained by adding the newly acquired current output to the power generation amount total value received from one measurement command device, and the obtained power generation amount total value is sent to the other first measurement command device. A power supply system characterized by transmitting.

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