JP2011166891A - Method for control of power supply system, and the power supply system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform speedy and detailed control of a distributed power supply, and to stably supply power by the distributed power supply. <P>SOLUTION: In each distributed power supply 3, measurement command devices 10 for taking charge of each measurement and control are connected mutually communicably. The measurement command devices 10 acquire a current frequency of a power system 2 and current output of own equipment, acquire current output of other equipment from each of other measurement command devices 10, generate a command value for controlling each output of the distributed power supply 3, based on the current frequency of the power system 2, the current output of the own equipment, and current output of the other equipment, obtain a transfer function between the command value and output, based on the command value and the output accumulated and stored for the distributed power supply 3 that cannot acquire the current output of the other equipment when at least one or more current outputs of the other equipment cannot be acquired, estimate the current output of the other equipment, which cannot be acquired, based on the obtained transfer function, and use the estimated current output of the other equipment to generate the command value. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for controlling a power supply system and a power supply system, and more particularly to a technique for enabling high-speed and fine-tuned control of a distributed power source and realizing stable power supply by the distributed power source.

  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. Since the grid size of the microgrid is smaller than that of a large-scale commercial power system, the system frequency greatly fluctuates even with a slight load fluctuation. For this reason, in order to realize the efficient operation of the microgrid, it is necessary to quickly grasp the operation status of the distributed power source and to carry out fine control.

  With respect to a power supply system that performs autonomous distributed control, Patent Document 1 describes each power generation facility connected to a microgrid so as to enable stable power supply with low frequency fluctuation and low cost without causing a problem such as a power failure. An AFC control device that can adjust the target frequency is installed in the system, and the AFC setting frequency is adjusted by the control device provided in each generator based on system information and power generation information without using a communication line. Autonomous distributed control for balancing and economical operation is disclosed.

  Further, in Patent Document 2, in order to enable high-speed and fine-tuned control of a distributed power source and to realize stable power supply by the distributed power source, each of the plurality of distributed power sources includes an arithmetic unit and a distributed power source. A measurement device that acquires the frequency of the power system connected to the output and the distributed power supply as a measured value and a control device that controls the output of the distributed power supply are attached so that each arithmetic device and each measurement device can communicate with each other. Then, each arithmetic device acquires the measurement value of each distributed power source from each measurement device attached to each of the distributed power sources, and each of the arithmetic devices is based on all the acquired measurement values, Generates a command value for controlling the distributed power source attached to itself, and inputs the generated command value to the control device attached to the distributed power source to which the control device is attached. Depending on the type of power supply By controlling, by the computing device that is attached to each of the distributed power sources, each of the arithmetic unit, a technology for autonomously controlling the output of the distributed power sources are each in charge is disclosed.

JP 2005-328622 A JP 2009-278834 A

  By the way, when the structure which autonomously controls the distributed power source which each arithmetic device takes charge like the technique of the said patent document 2, communication which connects each arithmetic device and each measuring device is adopted. When a failure such as communication failure or transmission delay occurs in the network, the measured value (generator output) of other distributed power sources cannot be obtained, and power generation injected into the entire small-scale power grid (microgrid) The amount cannot be grasped correctly. For this reason, it is assumed that the calculation accuracy of the regional requirement amount AR is lowered, and appropriate control of the supply and demand balance cannot be performed.

  The present invention has been made in view of such a background, and enables control of a power supply system that enables high-speed and fine-tuned control of a distributed power source and realizes stable power supply by the distributed power source. It is an object to provide a method and a power supply system.

One of the present invention for achieving the above object is as follows:
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 measurement command device that takes charge of each measurement and control,
The measurement command device includes an arithmetic device, a measurement device that 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, and the output of the distributed power source that each takes charge of And a control device for controlling
Each of the measurement command devices is connected to be communicable with each other,
The measurement command device is
Obtain the current frequency of the power system, and the current output of the own device that is the current output of the distributed power source that is responsible for,
From each of the other measurement command devices, obtain the other machine current output that is the current output of the other distributed power source that each is responsible for,
Based on the current frequency of the power system, the current machine current output, and the other machine current output, generate a command value for controlling each output of the distributed power source,
Control the output of the distributed power source that it is responsible for according to the generated command value,
A command value for each of the distributed power sources is stored and stored in association with the time when the control device is controlled by the command value,
The output of the distributed power source, which is measured and controlled by the measuring device, is stored in association with the measurement time,
The output of each of the distributed power sources acquired from each of the other measurement command devices is stored in association with each measurement time,
In the generation of the command value, if one or more of the other device current outputs cannot be acquired, the command value and the output stored in the distributed power source that could not acquire the other device current output are stored. On the basis of the distributed power source, a transfer function between the command value in the distributed power source and the output in the distributed power source is obtained, and the current output of the other device that could not be obtained based on the obtained transfer function is obtained. It is assumed that the command value is generated using the estimated current output of the other device.

  According to the present invention, when each of the measurement commanding devices cannot acquire one or more of the current outputs of other devices, the command value and the power generation for the distributed power source that cannot acquire the current outputs of the other devices. A transfer function with the machine output is obtained, the other machine current output that could not be acquired is estimated based on the obtained transfer function, and a command value is generated using the estimated other machine current output. For this reason, even when one or more of the other machine's current outputs could not be acquired due to, for example, a communication failure or a hardware failure of the measurement command device, each of the measurement command devices estimates its own command value. Since the distributed power source is controlled, it is possible to continue appropriate output control for the distributed power source that it is in charge of without being affected by the failure.

  The measurement command device performs a metaheuristic technique (for example, tabu search) using the command value and the output stored and stored for the distributed power source for which the current output of the other device could not be acquired, for example. The transfer function is obtained by estimating the other machine current output that could not be obtained using the obtained transfer function, and using the estimated other machine current output, A command value for controlling the output is generated.

  In addition, the measurement command device may be, for example, a power generation that is a sum of current generator outputs in the power system by summing the current output of the own device and the other device current outputs of all other distributed power sources. A total amount is obtained, a current frequency deviation is obtained based on the acquired frequency and a reference frequency in the power system, and a value obtained by multiplying the frequency deviation by a system frequency characteristic constant is multiplied by the total power generation amount. The command value for controlling each output of the distributed power source is generated by determining the required amount and distributing the determined regional request amount to each distributed power source according to a predetermined distribution condition.

  The distribution condition is, for example, a condition that the regional requirement amount is evenly distributed to each of the distributed power sources, a condition that the regional requirement amount is distributed according to the change rate of the output of each of the distributed power sources, And any one of the conditions that the regional demand is distributed according to the economics of each of the distributed power sources.

  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, while being able to perform high-speed and fine control of a distributed power supply, the stable electric power supply by a distributed power supply is realizable.

1 is a diagram illustrating a schematic configuration 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 figure which shows the structure of the record stored in the command value database. It is a flowchart explaining the outline | summary of the process which the arithmetic unit 11 performs. It is a flowchart explaining self-machine command value generation processing S700. It is a flowchart explaining the detail of missing data estimation process S717. It is a graph which shows an example of generator output Po (k) acquired from measured value database 421, and command value Pi (k) acquired from command value database 422. It is a flowchart explaining the calculation method of the time constants Ta and Tb using tabu search.

  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 comprised including the measurement instruction | command apparatus 10 and the 1 or more load 4 which are connected to the electric power grid | system 2.

  The distributed power source 3 is, 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 size generator). 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 transmission system control information transmission system (CDT: Cyclic Digital data Transmission equipment), metal line, optical fiber, etc.).

  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 inputs the acquired frequency and generator output to the arithmetic device 11. To do.

  The arithmetic device 11 controls the output of the distributed power source 3 based on the frequency and generator output input from the measuring device 12 and the generator output of another distributed power source 3 acquired via the communication network 50. The command value for generating 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 includes 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, a schedule of measurement values, control values, and command values. A display device 115 such as a liquid crystal display to be displayed, 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 a clock device 117 (radio clock or the like) that generates date and time information (time stamp) such as the current date and time. The arithmetic device 11 is realized using an information processing device such as a personal computer.

  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 computing device 11 includes a frequency acquisition unit 411, a self-device output acquisition unit 412, an other-device output acquisition unit 413, a missing data estimation unit 414, a generator output total unit 415, and a regional requirement amount calculation unit 416. , A filter processing unit 417, a distribution processing unit 418, and a command value input unit 419. Note that these functions are realized by the hardware of the arithmetic device 11 or by the CPU 111 executing a program stored in the memory 112 or the storage device 113.

  The arithmetic device 11 includes a measurement value database 421 and a command value database 422. These databases are 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 421.

  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 the own machine current output) is stored in the measurement value database 421 in association with the measurement time (time stamp). In addition, the own device output acquisition unit 412 notifies (broadcasts) the acquired own device current output to all the measurement command devices 10 of other distributed power sources 3 (hereinafter referred to as other devices) as needed.

  The other device output acquisition unit 413 receives the generator output of the distributed power source 3 (hereinafter referred to as the other device current) sent from the other measurement command device 10 through the communication network 50 as needed. Is called together with the identifier of the distributed power source 3, and the received other machine generator output is associated with the identifier and the measurement time (time stamp) of the generator output, and the measured value database 421. To store.

  The missing data estimation unit 414 can acquire one or more current outputs of other devices that are necessary when calculating the total of generator outputs, which will be described later, due to a communication failure in the communication network 50 or a hardware failure of the measurement command device 10. If not, the current output of the other device that has not been acquired (hereinafter also referred to as missing data) is used as the generator output stored in the measured value database 421 and the command value stored in the command value database 422. Use to estimate.

  The generator output totaling unit 415 includes the current output of the own device measured by the own device output acquisition unit 412 and all other values acquired by the other device output acquisition unit 413 (or estimated by the missing data estimation unit 414). And the other machine current output of the distributed power source 3 are summed to obtain the sum of the power injected into the power system 2 (hereinafter referred to as the total amount of power generation).

  The local 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 total power generation amount calculated by the generator output totaling unit 415. (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 the 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 receives a command value (for example, an LFC control amount (LFC) determined by a PID calculation (Proportional Integral Differential)) according to the regional request amount AR distributed to the distributed power source 3 that the distribution processing unit 418 is responsible for. : Load Frequency Control), and the generated command value is input to the control device 13.

  FIG. 5A shows the configuration of records stored in the measurement value database 421. As shown in the figure, the record stored in the measurement value database 421 includes items of a measurement value type 4211, an identifier 4212, a measurement value 4213, and an acquisition date 4214. Among these, the measurement value type 4211 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 identifier 4212, when the record is a record relating to the generator output, an identifier indicating which distributed power source 3 the generator output stored in the record is for (specific to each distributed power source 3) Identifier to be assigned). When a value indicating a frequency is set in the measurement value type 4211, nothing is set in the identifier 4212. In the measurement value 4213, a measurement value (frequency or generator output) is set. In the acquisition date 4214, the measurement date (time stamp) of the measurement value is set.

  FIG. 5B shows the configuration of records stored in the command value database 422. As shown in the figure, the record stored in the command value database 422 includes items of an identifier 4221, a command value 4222, and an application date and time 4223. Among these, the identifier 4212 is set with an identifier (identifier uniquely assigned to each distributed power source 3) indicating which distributed power source 3 has the command value. A command value is set in the command value 4222. In the control date and time 4223, the date and time (time stamp) when the distributed power source 3 is controlled by the command value is set.

  FIG. 6 shows an outline of processing performed by the arithmetic unit 11. FIG. 7 shows the details of the above process (hereinafter referred to as own machine command value generation process S700). Hereinafter, the process which the arithmetic unit 11 performs is demonstrated with these figures.

  As shown in FIG. 7, the arithmetic unit 11 monitors in real time whether or not an opportunity to generate a command value of the own device has arrived (for example, every 10 minutes) (S711). When the opportunity comes (S711: YES), the frequency acquisition unit 411 of the arithmetic device 11 acquires the current frequency from the measurement device 12, and stores the acquired current frequency in the measurement value database 421 (S712, FIG. 6). S611). The own device output acquisition unit 412 of the arithmetic device 11 acquires the own device current output from the measuring device 12, and stores the acquired own device current output in the measurement value database 421 (S713, S612 in FIG. 6). In addition, the own device output acquisition unit 412 notifies (broadcasts) the acquired own device current output to all the measurement command devices 10 of other devices (S714). In addition, if the other apparatus present output is notified from the measurement instruction apparatus 10 of another apparatus, the arithmetic unit 11 of each measurement instruction apparatus 10 stores the notified other apparatus current output in its own measured value database 421.

  Next, the other device output acquisition unit 413 of the arithmetic device 11 acquires the other device current output for all other devices connected to the power system 2 from the other measurement command device 10 via the communication network 50. (S715, S613 in FIG. 6). At this time, when one or more of the current outputs of other devices cannot be acquired due to a communication failure in the communication network 50 or a hardware failure of the measurement commanding device 10 (S716: YES), the missing data estimation unit 414 of the arithmetic device 11 Estimates the other machine current output that could not be acquired (hereinafter referred to as missing data) using the past generator output and command value stored in the measurement value database 421 and the command value database 422. (S717). Details of the processing relating to this estimation will be described later.

  Next, the generator output summation unit 415 of the arithmetic unit 11 sums the measured current output of the own machine and the other machine current outputs of all other machines acquired or estimated to obtain the total power generation amount (S718, FIG. 6). S614).

  Next, the regional requirement amount calculation unit 416 of the arithmetic device 11 obtains a frequency deviation ΔF for the measured current frequency (S615 in FIG. 6), and multiplies the obtained frequency deviation ΔF by a system frequency characteristic constant K (S616 in FIG. 6). ) And multiplying the multiplied value by the total power generation amount (S617 in FIG. 6) to obtain the regional requirement amount AR (S719).

  Next, the filter processing unit 417 of the arithmetic unit 11 performs filtering processing on the obtained regional requirement amount AR, that is, smoothing processing that removes an extremely short period component included in the regional requirement amount AR, and dead zone processing that removes a fine movement component. (S720, S618 in FIG. 6).

  Next, the distribution processing unit 418 of the arithmetic device 11 applies the condition (for example, the above-described first to third conditions) imposed on each distributed power source 3 connected to the power system 2 for the filtered regional request amount AR. Accordingly, the distributed power sources 3 are allocated (S721, S619 in FIG. 6).

  Next, the command value input unit 419 of the arithmetic device 11 generates and generates a command value (for example, LFC control amount) corresponding to the regional request amount AR distributed to the distributed power source 3 that the distribution processing unit 418 is responsible for. The command value is input to the control device 13 (S722, S620 in FIG. 6). Thereafter, the process returns to S711.

  FIG. 8 is a flowchart for explaining the details of the missing data estimation process S717 in the own machine command value generation process S700 shown in FIG. The missing data estimation unit 414 of the arithmetic unit 11 obtains the generator output Po (k) (∵k = 0, 1, 2,..., N) at a plurality of past times from the measurement value database 421 and the command value. The command value Pi (k) at a plurality of past times is acquired from the database 422 (S811). FIG. 9 shows an example of the generator output Po (k) acquired from the measurement value database 421 and the command value Pi (k) acquired from the command value database 422.

  Next, the missing data estimation unit 414 generates a transfer function (next order) between the command value Pi (k) and the generator output Po (k) based on the acquired generator output Po (k) and the command value Pi (k). Equation) is obtained. Then, the missing data estimation unit 414 obtains missing data (current output from other device) using the obtained transfer function (S813).

  Here, the time constants Ta and Tb in S812 are calculated by using the time constants Ta and Tb in the lead / lag element (1 + Tb · s) / (1 + Ta · s) as a meta-heuristics method (for example, tabu search ( tabu search), genetic algorithm, multi start local search, variable neighborhood search, simulated aneealing, etc.).

  FIG. 10 shows a method for calculating the time constants Ta and Tb using tabu search as a processing example in the above estimation. In the case of tabu search, first, the missing data estimation unit 414 generates time constants Ta and Tb, and sets the generated initial value to the variable S0 (S1011). The missing data estimation unit 414 sets the best state Sb as S0 and the current state S as S0 (S1012).

  Next, a plurality of time constants Ta and Tb (M) are selected in the vicinity of the current state S (S1013). Note that the processing from S1013 to S1020 is repeatedly executed for the set number of searches.

  Next, the missing data estimation unit 414 determines whether or not the transition operation to the neighborhood solution is described in the tabu list (S1014). If not described (S1014: YES), the process proceeds to S1015. If described (S1014: NO), the process proceeds to S1016. In S1015, the missing data estimation unit 414 sets P (k) as a true value and sets the objective function Σ (P (k) −Po (k)) ^ 2 (∵k = 0, 1, 2,..., N ). Note that the processing of S1014 and S1015 is repeatedly executed for the number of M neighboring solutions.

  Next, the missing data estimation unit 414 sets the neighborhood solution that minimizes the objective function as the best neighborhood solution S ′ (S1016), transitions the current state S to the best neighborhood solution S ′ (S1017), and displays S → in the tabu list. The operation of S ′ is written (S1018).

  Next, the missing data estimation unit 414 determines whether or not the best neighborhood solution S ′ is less than the best state Sb (S1019). If the best neighborhood solution S ′ is less than the best state Sb (S1019: YES), the missing data estimation unit 414 rewrites the best state Sb to the best neighborhood solution S ′ (S1020).

  As described above, in the power supply system 1 according to the present embodiment, when each of the measurement command devices 10 cannot acquire one or more of the other machine current outputs, the other machine current outputs are output. For the distributed power source 3 that could not be obtained, a transfer function between the command value and the generator output was obtained, and based on the obtained transfer function, the other device current output that could not be obtained was estimated, and the estimated other device current output was estimated. A command value is generated using. For this reason, each of the measurement command devices 10 estimates the command value by itself even when one or more of the other device current outputs cannot be acquired due to, for example, a communication failure or a hardware failure of the measurement command device 10. Thus, since the distributed power source 3 is controlled, the output control of the generator can be continued for the distributed power source 3 that it is in charge of without being affected by the failure.

  In addition, the description of the above embodiment is for facilitating understanding of the present invention, and does not limit the present invention. It goes without saying that the present invention can be changed and improved without departing from the gist thereof, and that the present invention includes equivalents thereof.

DESCRIPTION OF SYMBOLS 1 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 Own apparatus output acquisition part 413 Other apparatus output acquisition part 414 Missing data estimation part 415 Generator output summation unit 416 Regional requirement amount calculation unit 417 Filter processing unit 418 Distribution processing unit 419 Command value input unit 421 Measurement value database 422 Command value database S700 Own device command value generation processing S717 Missing data estimation processing

Claims (7)

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 measurement command device that takes charge of each measurement and control,
The measurement command device includes an arithmetic device, a measurement device that 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, and the output of the distributed power source that each takes charge of And a control device for controlling
Each of the measurement command devices is connected to be communicable with each other,
The measurement command device is
Obtain the current frequency of the power system, and the current output of the own device that is the current output of the distributed power source that is responsible for,
From each of the other measurement command devices, obtain the other machine current output that is the current output of the other distributed power source that each is responsible for,
Based on the current frequency of the power system, the current machine current output, and the other machine current output, generate a command value for controlling each output of the distributed power source,
Control the output of the distributed power source that it is responsible for according to the generated command value,
A command value for each of the distributed power sources is stored and stored in association with the time when the control device is controlled by the command value,
The output of the distributed power source, which is measured and controlled by the measuring device, is stored in association with the measurement time,
The output of each of the distributed power sources acquired from each of the other measurement command devices is stored in association with each measurement time,
In the generation of the command value, if one or more of the other device current outputs cannot be acquired, the command value and the output stored in the distributed power source that could not acquire the other device current output are stored. On the basis of the distributed power source, a transfer function between the command value in the distributed power source and the output in the distributed power source is obtained, and the current output of the other device that could not be obtained based on the obtained transfer function is obtained. A control method for a power supply system, wherein the command value is generated using the estimated current output of the other device. It is a control method of the electric power supply system according to claim 1,
The measurement command device stores and stores the distributed power source that could not acquire the current output of the other device, obtains the transfer function by performing a metaheuristic method using the command value and the output, Estimating the current output of the other device that could not be obtained using the obtained transfer function, and using the estimated current output of the other device, command values for controlling the respective outputs of the distributed power source A method for controlling an electric power supply system. It is a control method of the electric power supply system according to claim 2,
A tabu search is used as the metaheuristic method. A method for controlling an electric power supply system. It is a control method of the electric power supply system according to claim 1,
The measurement command device
Obtaining the total power generation amount that is the sum of the current generator output in the power system by summing the current output of the own machine and the other machine current output of all the other distributed power sources,
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 amount, a regional requirement amount is obtained,
The power supply system characterized by generating the command value for controlling the output of each of the distributed power sources by allocating the obtained regional requirement amount to each of the distributed power sources according to a predetermined distribution condition. Control method. It is a control method of the electric power supply system according to claim 4,
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. A power supply system configured to include a plurality of distributed power sources,
Including a measurement commanding device in charge of each measurement and control provided in each of the distributed power sources;
The measurement command device includes an arithmetic device, a measurement device that 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, and the output of the distributed power source that each takes charge of And a control device for controlling
Each of the measurement command devices is connected to be communicable with each other,
The measurement command device is
Obtain the current frequency of the power system, and the current output of the own device that is the current output of the distributed power source that is responsible for,
From each of the other measurement command devices, obtain the other machine current output that is the current output of the other distributed power source that each is responsible for,
Based on the current frequency of the power system, the current machine current output, and the other machine current output, generate a command value for controlling each output of the distributed power source,
Control the output of the distributed power source that it is responsible for according to the generated command value,
A command value for each of the distributed power sources is stored and stored in association with the time when the control device is controlled by the command value,
The output of the distributed power source, which is measured and controlled by the measuring device, is stored in association with the measurement time,
The output of each of the distributed power sources acquired from each of the other measurement command devices is stored in association with each measurement time,
In the generation of the command value, if one or more of the other device current outputs cannot be acquired, the command value and the output stored in the distributed power source that could not acquire the other device current output are stored. On the basis of the distributed power source, a transfer function between the command value in the distributed power source and the output in the distributed power source is obtained, and the current output of the other device that could not be obtained based on the obtained transfer function is obtained. The power supply system characterized by estimating and producing | generating the said command value using the estimated said other apparatus present output. The power supply system according to claim 6,
The measurement command device stores and stores the distributed power source that could not obtain the current output of the other device, obtains the transfer function by performing a metaheuristic method using the command value and the output, Estimating the current output of the other device that could not be obtained using the obtained transfer function, and using the estimated current output of the other device, command values for controlling the respective outputs of the distributed power source A power supply system characterized by generating.

Images