JP2019057999A - Power control unit, power control method and program - Google Patents

Abstract

To provide a technology of distributing regional request power to a storage battery group and a power generator group.SOLUTION: A power control unit 10 includes: a determination part 11 for determining output request power on the basis of a frequency deviation of a power system; a distribution part 12 which distributes a component varying at a larger cycle than a reference value to a power generator group on the basis of a frequency component of output request power and distributes a component varying at a cycle lower than the reference value or less to a storage battery group. The distribution part 12 dynamically changes the reference value.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a power control apparatus, a power control method, and a program.

  There are LFC (load frequency control) and Δf control (GF (governor free) equivalent control) as a method of adjusting the frequency of the power system. There are FFC (flat frequency control), FTC (flat tie line control) and TBC (tie line bias control) as LFC, and most Japanese electric power companies adopt TBC.

  In the TBC, the regional required power is calculated based on the frequency deviation and the interconnection power flow deviation. Then, the power supplied to the power system is adjusted (increased or decreased) based on the value of the regional required power.

  Related techniques are disclosed in Patent Documents 1 to 4.

  In Patent Literature 1, the regional required power is frequency-resolved, the short-cycle component is allocated to the high-speed machine (generator), the medium-cycle component is allocated to the low-speed machine (generator), and the long-cycle component is ELD value (economic). A technique for adding to the load distribution schedule value) is disclosed.

  Japanese Patent Laid-Open No. 2004-228688 discloses that the regional required power is calculated and a generator to which the regional required power is to be allocated is determined based on the fluctuation amount of the regional required power and a threshold value during a predetermined period.

  In Patent Literature 3, load power is estimated based on the compensation frequency band of the storage battery determined based on past performance data and the sum of the purchased power and the output of the storage battery, and the output of the storage battery is calculated based on the estimated load power. Techniques for controlling are disclosed.

  Patent Document 4 discloses a technique for allocating regional required power to each generator and calculating a target command value for the output of each generator.

JP 2013-34324 A JP 2017-60325 A JP 2014-180134 A JP 2002-209336 A

IEEJ Technical Report No. 869 IEEJ Technical Report No. 1386

  In recent years, a technique for utilizing a storage battery as an adjustment power has been studied. Patent Documents 1 to 4 do not disclose a technique for distributing the regional required power to the storage battery group and the generator group. This invention makes it a subject to provide the technique which distributes area request | requirement electric power to a storage battery group and a generator group.

According to the present invention,
Determining means for determining the required output power based on the frequency deviation of the power system;
Distributing means for distributing a component that fluctuates with a period greater than a reference value to a generator group based on a frequency component of the output required power, and for distributing a component that fluctuates with a period equal to or less than the reference value to a storage battery group;
Have
The distribution means is provided with a power control device that dynamically changes the reference value.

Moreover, according to the present invention,
Computer
A determination step of determining the required output power based on the frequency deviation of the power system;
Distributing a component that varies with a period greater than a reference value to a generator group based on a frequency component of the output required power, and distributing a component that varies with a period equal to or less than the reference value to a storage battery group;
Run
In the distribution step, a power control method for dynamically changing the reference value is provided.

Moreover, according to the present invention,
Computer
Determining means for determining the required output power based on the frequency deviation of the power system;
Distributing means for distributing a component that varies with a period greater than a reference value to a generator group based on a frequency component of the output required power, and for distributing a component that varies with a period less than the reference value to a storage battery group,
Function as
The distribution means is provided with a program for dynamically changing the reference value.

  ADVANTAGE OF THE INVENTION According to this invention, the technique which distributes area request | requirement electric power to a storage battery group and a generator group is implement | achieved.

It is a figure for demonstrating the application scene of the power control apparatus of this embodiment. It is a figure which shows an example of the hardware constitutions of the power control apparatus of this embodiment. It is a figure which shows an example of the functional block diagram of the power control apparatus of this embodiment. It is a figure for demonstrating the concept of a process of the power control apparatus of this embodiment. It is a flowchart which shows an example of the flow of a process of the power control apparatus of this embodiment. It is a flowchart which shows an example of the flow of a process of the power control apparatus of this embodiment.

<First Embodiment>
First, the application scene of the power control apparatus of this embodiment is demonstrated using FIG.

  The first power plant 2 is, for example, a thermal power plant, and supplies the power generated by the generator to the power system 6. The second power plant 3 is, for example, a hydro power plant, and supplies the power generated by the generator to the power system 6. The outputs of the first power plant 2 and the second power plant 3 are controlled by the central power supply command station 1. Note that the first power plant 2 and the second power plant 3 may be other types of power plants. Three or more power plants may be under the control of the central power supply command station 1.

  The electric power consumer system group 5 is a group of electric power consumer systems provided for each electric power consumer. The electric power consumer system includes a storage battery. The storage battery charge / discharge command station 4 controls charging / discharging of the plurality of storage batteries of the power consumer system group 5. The electric power discharged from the storage battery is supplied to the electric power system 6. The storage battery can also receive power from the power system 6 and be charged.

  The central power supply command station 1 adjusts the frequency of the power system 6 by controlling the output from the generator group and the storage battery group. Specifically, the central power supply command station 1 determines an output target value to be output from each of the generator group and the storage battery group, and uses the determined output target value for each power station (first power station 2, second power generation). 3) and the storage battery charge / discharge command station 4. Each power plant (first power plant 2, second power plant 3, etc.) controls the output of the generator based on the output target value received from the central power supply command station 1. Further, the storage battery charge / discharge command station 4 controls the output of the storage battery group based on the output target value received from the central power supply command station 1. The power control apparatus of this embodiment is used at the central power supply command station 1.

  Here, an outline of the power control apparatus will be described. The power control device, when determining the required output power based on the frequency deviation of the power system (for example, determining based on the regional required power), analyzes the frequency of the required output power. Here, the frequency analysis is, for example, a signal after passing through the frequency filter when a frequency filter (a low-pass filter, a high-pass filter, a band-pass filter using both) is applied to the signal, and the frequency filter band is changed. This means analyzing strength. Note that the intensity of each signal frequency may be analyzed by Fourier transform or the like, but the method using a frequency filter is easier to derive the reference value described below. Then, the power control device distributes the component that fluctuates with a period larger than the reference value to the generator group, and distributes the component that fluctuates with a period equal to or less than the reference value to the storage battery group. The power control apparatus can dynamically change the reference value. Here, the reference value for determining the “component that fluctuates with a large period” distributed to the generator group is a period determined by the time constant of the low-pass filter.

  According to such a power control apparatus of the present embodiment, a long-period component having a relatively long fluctuation cycle in the output required power is distributed to the generator group, and the fluctuation cycle in the output required power is relatively long. Short short-period components can be distributed to the storage battery group. Because storage batteries have an output change rate that is orders of magnitude faster than generators, the output response performance for frequency adjustment is dramatically improved by distributing the short-period components of regional power requirements to the storage battery group instead of the generator. Can be increased. Further, it is possible to avoid the remaining distribution of the required output power, and it is possible to reduce the load on the generator with respect to the output change.

  Further, according to the power control apparatus of the present embodiment, the frequency band distributed to each of the generator group and the storage battery group can be dynamically changed by dynamically changing the reference value. In such a case, desired control according to the situation at each control timing (for example, the number of interconnections of the storage battery group, interconnection output, interconnection capacity, storage state, etc.) is realized. For example, the upper limit power that can be output from the storage battery group at each control timing is calculated, and the frequency band to be distributed to the storage battery group at each control timing can be determined so that the upper limit power is output from the storage battery group. In this way, the storage battery group can be fully utilized. As a result, the effect of improving the output response performance and the effect of reducing the burden on the generator group with respect to the output change can be maximized under each situation.

  Hereinafter, the configuration of the power control apparatus will be described in detail. First, an example of the hardware configuration of the power control apparatus will be described.

  Each unit included in the power control apparatus of this embodiment includes a CPU (Central Processing Unit) of an arbitrary computer, a memory, a program loaded into the memory, a storage unit such as a hard disk for storing the program (from the stage of shipping the apparatus in advance) In addition to stored programs, CDs (Compact Discs) and other storage media and programs downloaded from servers on the Internet can also be stored.) Arbitrary combinations of hardware and software, centering on network connection interfaces It is realized by. It will be understood by those skilled in the art that there are various modifications to the implementation method and apparatus.

  FIG. 2 is a block diagram illustrating a hardware configuration of the power control apparatus according to this embodiment. As shown in FIG. 2, the power control apparatus includes a processor 1A, a memory 2A, an input / output interface 3A, a peripheral circuit 4A, and a bus 5A. The peripheral circuit 4A includes various modules. The peripheral circuit 4A may not be provided.

  The bus 5A is a data transmission path through which the processor 1A, the memory 2A, the peripheral circuit 4A, and the input / output interface 3A transmit / receive data to / from each other. The processor 1A is an arithmetic processing device such as a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit). The memory 2A is a memory such as a RAM (Random Access Memory) or a ROM (Read Only Memory). The input / output interface 3A is an interface for acquiring information from an input device (eg, keyboard, mouse, microphone, etc.), external device, external server, external sensor, etc., and an output device (eg, display, speaker, printer, mailer). Etc.), an interface for outputting information to an external device, an external server, etc. The processor 1A can issue a command to each module and perform a calculation based on the calculation result.

  Next, the functional configuration of the power control apparatus will be described. FIG. 3 shows an example of a functional block diagram of the power control apparatus 10. As illustrated, the power control apparatus 10 includes a determination unit 11 and a distribution unit 12.

  The determination unit 11 determines the required output power based on the frequency deviation of the power system. The determination unit 11 determines the required output power every predetermined time T. The predetermined time T is, for example, about several seconds.

  First, the determination unit 11 calculates the regional required power. For example, the determination unit 11 calculates the regional required power based on the following formula (1) on the premise of TBC (tie line bias control).

  K is a system constant. ΔF is the frequency deviation of the system. ΔPt is the interconnection power flow deviation. Note that ΔPt is positive when the tidal current flows into the own system and negative when the tidal current flows out into the other system. When the regional required power is a positive value, the power supplied to the power system is increased, and when the regional required power is a negative value, the power supplied to the power system is decreased.

  Then, the determination part 11 performs various processes with respect to the calculated area | region required electric power, and makes the value after a process the output required electric power. Various processes can include a smoothing process, a PI (proportional integral) control process, and the like. Other processing may be further included. General examples of these calculation processes are described in Non-Patent Documents 1 and 2, for example.

  The distribution unit 12 distributes a component that fluctuates with a period larger than the reference value to the generator group based on the frequency component of the output required power, and distributes a component that fluctuates with a period equal to or less than the reference value to the storage battery group. Specifically, the distribution unit 12 performs frequency analysis on the required output power, distributes a component that fluctuates with a period larger than the reference value to the generator group, and distributes a component that fluctuates with a period equal to or less than the reference value to the storage battery group. .

  The distribution unit 12 can dynamically change the reference value. For example, the distribution unit 12 may determine the reference value every predetermined time T, that is, in the same cycle as the calculation of the required output power. In addition, the distribution unit 12 may determine the reference value every time longer than the predetermined time T, that is, in a cycle longer than the calculation of the required output power.

  Here, the concept of dynamically changing the reference value will be described with reference to FIG. The horizontal axis represents the fluctuation cycle of the component included in the output required power after various processing is performed on the regional required power. The figure is an example in the case where the fluctuation period includes a component between 1 minute and 25 minutes in the required output power. X is a reference value, region A is a component distributed to the storage battery group, and region B is a component distributed to the generator group. From the figure, it can be seen that by changing X, the frequency band distributed to the storage battery group and the frequency band distributed to the generator group change. Moreover, it turns out that the electric energy distributed to a storage battery group and the electric energy distributed to a generator group change according to the change.

Next, a method for determining the reference value will be described. The distribution unit 12 determines a reference value based on the result of frequency analysis of the required output power and the storage battery group information regarding the storage battery group. Specifically, the distribution unit 12 determines an upper limit P [W] of power that can be distributed to the storage battery group based on the storage battery group information. Next, the distribution unit 12 determines whether the integrated value Q [W] of the component from the smallest fluctuation cycle t ₀ to the fluctuation cycle t ₁ in the output required power and the upper limit P satisfy a predetermined condition. Then, the distribution unit 12 sets a fluctuation period t1 where P and Q satisfy a predetermined condition as a reference value.

  “Upper limit P of power that can be distributed to storage battery group” is an upper limit of power that can be distributed to the storage battery group for LFC.

  For example, the rated output [W] of each storage battery may be notified to the storage battery charge / discharge command station 4 in advance. Then, the storage battery charge / discharge command station 4 may notify the central power supply command station 1 of the total rated output of each storage battery as power (storage battery group information) that can be distributed to the storage battery group. In this case, the distribution unit 12 may set the power that can be distributed to the storage battery group notified from the storage battery charge / discharge command station 4 as the upper limit P.

  In addition, the LFC output upper limit [W] of each storage battery may be notified to the storage battery charge / discharge command station 4 in advance. For example, the owner of each storage battery may determine the output upper limit [W] for LFC of his / her storage battery. Then, the storage battery charge / discharge command station 4 may notify the central power supply command station 1 of the total output upper limit for LFC of each storage battery as power (storage battery group information) that can be distributed to the storage battery group. In this case, the distribution unit 12 may set the power that can be distributed to the storage battery group notified from the storage battery charge / discharge command station 4 as the upper limit P.

  In addition, the time change of the predicted power consumption [W] of each power consumer may be notified to the storage battery charge / discharge command station 4 in advance. Moreover, the rated output [W] of each storage battery may be notified to the storage battery charge / discharge command station 4 in advance.

  In this case, the storage battery charge / discharge command center 4 calculates the value obtained by subtracting the predicted power consumption [W] from the rated output [W] (or the value obtained by subtracting the predicted power consumption [W] + α from the rated output [W]). You may determine as the output upper limit [W] for LFC of a storage battery in each timing. And the electric power which can be distributed to the storage battery group in each time slot | zone may be calculated by totaling the output upper limit [W] for LFC of each electric power consumer. The storage battery charge / discharge command station 4 notifies the central power supply command station 1 of the total output upper limit for LFC of each storage battery at each timing as power (storage battery group information) that can be distributed to the storage battery group at each timing. May be. In this case, the distribution part 12 is good also considering the electric power which can be distributed to the storage battery group in each timing notified from the storage battery charging / discharging command place 4 as the upper limit P in each timing.

  In addition, for example, the Δf control output upper limit [W] may be predetermined for each storage battery. Moreover, the rated output [W] of each storage battery may be notified to the storage battery charge / discharge command station 4 in advance. The storage battery charge / discharge command station 4 may calculate {(rated output) − (Δf control output upper limit [W])} as power that can be distributed to each storage battery. Then, the storage battery charge / discharge command station 4 may notify the central power supply command station 1 of the total power that can be distributed to each storage battery as power (storage battery group information) that can be distributed to the storage battery group. In this case, the distribution unit 12 may set the power that can be distributed to the storage battery group notified from the storage battery charge / discharge command station 4 as the upper limit P.

  In addition, for example, the Δf control output upper limit [W] may be predetermined for each storage battery. Moreover, the time change of the estimated power consumption [W] of each electric power consumer may be notified to the storage battery charge / discharge command station 4 in advance. Furthermore, the rated output [W] of each storage battery may be notified to the storage battery charge / discharge command station 4 in advance.

  In this case, the storage battery charge / discharge command station 4 subtracts the predicted power consumption [W] and the Δf control output upper limit [W] from the rated output [W] (or the predicted power consumption [W] from the rated output [W]. ] And Δf control output upper limit [W] + α) may be determined as the LFC output upper limit [W] of the storage battery at each timing. And the electric power which can be distributed to the storage battery group in each timing may be calculated by totaling the output upper limit [W] for LFC of each storage battery. The storage battery charge / discharge command station 4 notifies the central power supply command station 1 of the total output upper limit for LFC of each storage battery at each timing as power (storage battery group information) that can be distributed to the storage battery group at each timing. May be. In this case, the distribution part 12 is good also considering the electric power which can be distributed to the storage battery group in each timing notified from the storage battery charging / discharging command place 4 as the upper limit P in each timing.

  Next, “predetermined conditions for P and Q” will be described. The predetermined condition of P and Q may be “P = Q”, for example.

  In addition, the predetermined condition of P and Q may be “k × P ≦ Q ≦ P”. k is a value greater than 0 and less than 1. From the viewpoint of utilizing the storage battery group as much as possible (making the output from the storage battery group as large as possible), it is preferable to make k as close to 1 as possible and Q as close as possible to P. For example, k is 0.8 or more, preferably 0.9 or more, and more preferably 0.95 or more.

  In addition, the predetermined condition of P and Q is that “Q is a constraint in deriving the integrated value Q (for example, a resolution step size when a frequency analysis is performed by changing a time constant of a low-pass filter in frequency analysis). Among them, it may be a maximum value satisfying Q ≦ P.

  Next, an example of a processing flow of the power control apparatus 10 of the present embodiment will be described using the flowchart of FIG.

  First, the determination part 11 determines output request | requirement electric power based on the frequency deviation of an electric power grid | system (S10).

  Thereafter, the distribution unit 12 performs frequency analysis on the required output power determined in S10 (S11). Next, the distribution unit 12 determines a reference value based on the result of the frequency analysis in S11 and the storage battery group information regarding the storage battery group (S12). Then, the distribution unit 12 distributes the component that varies in a cycle larger than the reference value determined in S12 to the generator group, and distributes the component that varies in a cycle equal to or less than the reference value to the storage battery group (S13).

  Thereafter, the power control apparatus 10 outputs the distribution result (S14). For example, the power control apparatus 10 distributes the output required power distributed to the generator group to each generator. Then, the power control apparatus 10 notifies the system of each power plant (the first power plant 2, the second power plant 3, etc., see FIG. 1) of the output required power distributed to each power generator. The means for distributing the required output power distributed to the generator group to each generator is not particularly limited in this embodiment.

  In addition, the power control apparatus 10 notifies the system of the storage battery charge / discharge command station 4 (see FIG. 1) of the output required power distributed to the storage battery group. The system of the storage battery charging / discharging command station 4 distributes the output required power distributed to the storage battery group to each storage battery. And the system of the storage battery charging / discharging command station 4 notifies the apparatus which controls the operation | movement of each storage battery about the output request | requirement electric power distributed to each storage battery. Note that means for distributing the required output power distributed to the storage battery group to each storage battery is not particularly limited in the present embodiment.

  In the present embodiment, for example, S10 to S14 can be performed every predetermined time T.

  According to the power control apparatus 10 of the present embodiment described above, a long-period component having a relatively long fluctuation cycle in the output required power is distributed to the generator group, and a relatively fluctuation cycle in the output request power is relative to the generator group. Can be distributed to the storage battery group. Because storage batteries have an output change rate that is orders of magnitude faster than generators, the output response performance for frequency adjustment is dramatically improved by distributing the short-period components of regional power requirements to the storage battery group instead of the generator. Can be increased. Further, it is possible to avoid the remaining distribution of the required output power, and it is possible to reduce the load on the generator with respect to the output change.

  Further, according to the power control apparatus of the present embodiment, the frequency band distributed to each of the generator group and the storage battery group can be dynamically changed by dynamically changing the reference value. In such a case, desired control according to the situation at each control timing (for example, the number of interconnections of the storage battery group, interconnection output, interconnection capacity, storage state, etc.) is realized. For example, the upper limit power that can be output from the storage battery group at each control timing is calculated, and the frequency band to be distributed to the storage battery group at each control timing can be determined so that the upper limit power is output from the storage battery group. In this way, the storage battery group can be fully utilized. As a result, the effect of improving the output response performance and the effect of reducing the burden on the generator group with respect to the output change can be maximized under each situation.

<Second Embodiment>
The power control apparatus 10 of the present embodiment is different from the first embodiment in the reference value determination method. Other configurations are the same as those of the first embodiment.

  An example of the hardware configuration of the power control apparatus 10 of the present embodiment is shown in FIG. 2 as in the first embodiment.

  Moreover, an example of a functional block diagram of the power control apparatus 10 of this embodiment is shown in FIG. 3 as in the first embodiment. The configuration of the determination unit 11 is the same as that of the first embodiment.

The distribution unit 12 determines the upper limit P of power that can be distributed to the storage battery group based on the storage battery group information, as in the first embodiment. Then, the integrated value Q and the upper limit P of the output power required from the smallest variation period t ₀ to the fluctuation period t ₁ is determined whether a predetermined condition is satisfied. And when the period t1 which satisfy | fills a predetermined condition exceeds the predetermined upper limit M, let the upper limit M be a reference value. On the other hand, when the period t1 that satisfies the predetermined condition does not exceed the predetermined upper limit M, t1 is set as the reference value. Other configurations of the distribution unit 12 are the same as those in the first embodiment.

  Next, the effect of this embodiment is demonstrated. As described above, the storage battery has a faster output change rate than the generator. For this reason, the output response performance for frequency adjustment can be improved more by distributing more frequency components to the storage battery group. However, the amount of power that can be output from the storage battery group is limited, and the depletion of the charging power of the storage battery group becomes faster as the frequency band to be borne by the storage battery group becomes wider. When the charging power of the storage battery group is depleted, it becomes impossible to output power from the storage battery group. For this reason, when the charging power of the storage battery group is depleted, the short period component of the output required power must be borne by the generator thereafter. In the present embodiment, the above-described inconvenience is reduced by setting the upper limit value M at the reference time and not setting the reference value exceeding the upper limit value M.

<Third Embodiment>
The power control apparatus 10 of the present embodiment is different from the first and second embodiments in the reference value determination method. Other configurations are the same as those in the first and second embodiments.

  An example of the hardware configuration of the power control apparatus 10 of the present embodiment is shown in FIG. 2 as in the first and second embodiments.

  Moreover, an example of a functional block diagram of the power control apparatus 10 of this embodiment is shown in FIG. 3 as in the first and second embodiments. The configuration of the determination unit 11 is the same as in the first and second embodiments.

  The distribution unit 12 is “a prediction model that machine-learns the correlation between the total demand amount of the power system for each past season and time and the result of frequency analysis of the past output request power (output request power for each frequency component). ”And“ estimated timing season, time, and total demand of power system ”, the required output power for each frequency component at each timing is predicted and estimated.

  And the distribution part 12 determines a reference value based on the estimation result of the frequency analysis of output request electric power, and the storage battery group information regarding a storage battery group similarly to the 1st and 2nd embodiment. Examples of the prediction model include, but are not limited to, multiple regression analysis, neural network, support vector machine, hidden Markov model, and the like.

  According to the power control apparatus 10 of this embodiment, an optimal reference value can be determined based on past results. In such a case, the degree of freedom in determining the reference value is increased. That is, it is not necessary to determine the reference value for each period T for each period T, and the reference value for each period T can be determined in advance (for example, the previous day). As a result, it is possible to reduce the processing load of the power control apparatus 10 performed every cycle T.

<Fourth Embodiment>
The power control apparatus 10 of the present embodiment is different from the first to third embodiments in a method for determining a reference value, specifically, a method for calculating the upper limit P of power that can be distributed to the storage battery group. Other configurations are the same as those of the first to third embodiments.

  An example of the hardware configuration of the power control apparatus 10 of this embodiment is shown in FIG. 2 as in the first to third embodiments.

  An example of a functional block diagram of the power control apparatus 10 of the present embodiment is shown in FIG. 3 as in the first to third embodiments. The configuration of the determination unit 11 is the same as in the first to third embodiments.

  The distribution unit 12 is different from the first to third embodiments in the method of calculating the upper limit P of power that can be distributed to the storage battery group. Other configurations of the distribution unit 12 are the same as those in the first to third embodiments.

Distribution unit 12, when determining the upper limit P of the first period T _1, first, based on the result of Δf Control Output [W] of the battery in the period prior to the first period T _1, the first the upper limit of Δf control output in period T ₁ [W] is determined for each battery. For example, a statistical value (e.g., maximum value, minimum value, average value, median value, mode value, etc.) of Δf control output [W] of each storage battery in the period before the _first period T1 determining the upper limit of Δf control output [W] in the period T ₁ of the. Then, the distribution unit 12 calculates {(rated output) − (Δf control output upper limit [W])} as power that can be distributed to each storage battery, and calculates the total power that can be distributed to each storage battery as the first power. determining the upper limit P of the periodic _{T 1} of the.

In addition, as processing for determining the upper limit of the Δf control output [W] in the first cycle T ₁ for each storage battery and the power that can be distributed to each storage battery, {(rated output) − (Δf control output upper limit [ W])} may be calculated by the storage battery charge / discharge command station 4 to calculate the total amount of power that can be distributed to each storage battery. Then, the storage battery charge / discharge command station 4 may notify the central power supply command station 1 of the total power that can be distributed to each storage battery as power (storage battery group information) that can be distributed to the storage battery group. In this case, the distribution unit 12 may set the power that can be distributed to the storage battery group notified from the storage battery charge / discharge command station 4 as the upper limit P.

As a modified example, the distribution unit 12 has a “prediction model in which the correlation between the total demand of the power system for each past season and time and the Δf control output [W] of each past storage battery is machine-learned”; The Δf control output [W] of each storage battery in the first cycle T ₁ may be predicted based on “estimated timing season, time, and total amount of power system demand”. Then, the distribution unit 12 calculates {(rated output) − (Δf control output upper limit [W])} as power that can be distributed to each storage battery, and calculates the total power that can be distributed to each storage battery as the first power. it may be determined as the upper limit P of the periodic T _1. Examples of the estimation model include, but are not limited to, multiple regression analysis, neural network, support vector machine, hidden Markov model, and the like.

In addition, as the process for predicting the Δf control output [W] of each storage battery in the first cycle T ₁ and the power that can be distributed to each storage battery, {(rated output) − (Δf control output upper limit [W] )} And the storage battery charge / discharge command station 4 may perform a process of calculating the total power that can be distributed to each storage battery. Then, the storage battery charge / discharge command station 4 may notify the central power supply command station 1 of the total power that can be distributed to each storage battery as power (storage battery group information) that can be distributed to the storage battery group. In this case, the distribution unit 12 may set the power that can be distributed to the storage battery group notified from the storage battery charge / discharge command station 4 as the upper limit P.

  According to the power control apparatus 10 of the present embodiment, it is possible to appropriately share the Δf control output and the LFC output and effectively use the storage battery.

<Fifth Embodiment>
The power control apparatus 10 of the present embodiment differs from the first to fourth embodiments in the reference value determination cycle. Other configurations are the same as those of the first to fourth embodiments.

  An example of the hardware configuration of the power control apparatus 10 of this embodiment is shown in FIG. 2 as in the first to fourth embodiments.

  An example of a functional block diagram of the power control apparatus 10 of the present embodiment is shown in FIG. 3 as in the first to fourth embodiments. The configuration of the determination unit 11 is the same as that of the first to fourth embodiments. The configuration of the distribution unit 12 will be described below.

  Here, an example of a processing flow of the power control apparatus 10 of the present embodiment will be described with reference to FIG.

  First, the determination part 11 determines output request | requirement electric power based on the frequency deviation of an electric power grid | system (S10).

  Thereafter, the distribution unit 12 performs frequency analysis on the required output power determined in S10 (S11). Next, the distribution unit 12 distributes the component that fluctuates with a period larger than the reference value to the generator group, and distributes the component that fluctuates with a period equal to or less than the reference value to the storage battery group (S13). Thereafter, the power control apparatus 10 outputs the distribution result (S14).

  For example, the power control apparatus 10 can perform S10, S11, S13, and S14 every predetermined time T. The predetermined time T is, for example, about several seconds.

  And although not shown in figure, the distribution part 12 determines a reference value (S12) for every predetermined time T 'larger than the predetermined time T. FIG. The predetermined time T ′ is, for example, about several minutes. The determination of the reference value may be realized by the same means as in the first and second embodiments. In this case, in S13, the distribution unit 12 may perform distribution based on the latest reference value at that time. The predetermined time T ′ may be determined depending on the time required for mathematical analysis processing using machine learning or the like used in the third embodiment or the fourth embodiment.

  According to the power control apparatus 10 of the present embodiment, the reference value determination cycle can be made larger than those in the first to fourth embodiments. As a result, it is possible to reduce the processing load of the power control apparatus 10 performed every cycle T.

<Sixth Embodiment>
The power control apparatus 10 of the present embodiment is different from the first to fifth embodiments in the reference value determination method. Other configurations are the same as those of the first to fifth embodiments.

  An example of the hardware configuration of the power control apparatus 10 of the present embodiment is shown in FIG. 2 as in the first to fifth embodiments.

  Moreover, an example of a functional block diagram of the power control apparatus 10 of the present embodiment is shown in FIG. 3 as in the first to fifth embodiments. The configuration of the determination unit 11 is the same as in the first to fifth embodiments.

  In the present embodiment, the storage battery group includes first to third output rates according to output change rates [W / seconds] that can be realized as performance, or output rates [W / sec] that are separately set in consideration of control characteristics to prevent hunting and the like. It is classified into an nth group (n is an integer of 2 or more).

Then, the distribution unit 12 distributes the output required power from the smallest fluctuation cycle t _{1 · 0} to the fluctuation cycle t _{1 · 1} to the first group, and from the fluctuation cycle t _{1 · (n−1)} to the fluctuation cycle t. _The required output power up to _{1 · n} is distributed to the nth group, and the required output power greater than the fluctuation period t _{1 · n} is distributed to the generator group. In addition, the group with a smaller value of n includes a storage battery having a higher output change rate.

The distribution unit 12 determines the upper limit of power that can be distributed to each group in the same manner as in the first to fifth embodiments. Then, the integrated value of the output required power from the fluctuation cycle t _{1 · (n−1)} to the fluctuation cycle t _m (t _{1 · (n−1)} <t _m ) and the power that can be distributed to the nth group It is determined whether the upper limit satisfies a predetermined condition, and t _m satisfying the predetermined condition is defined as t _{1 · n} .

  According to this embodiment, a shorter cycle component can be distributed to a storage battery having a faster output change rate. As a result, the output response performance can be further improved.

Hereinafter, examples of the reference form will be added.
1. Determining means for determining the required output power based on the frequency deviation of the power system;
Distributing means for distributing a component that fluctuates with a period greater than a reference value to a generator group based on a frequency component of the output required power, and for distributing a component that fluctuates with a period equal to or less than the reference value to a storage battery group;
Have
The distribution means is a power control apparatus that dynamically changes the reference value.
2. In the power control apparatus according to 1,
The determining means determines the output required power every predetermined time T,
The distribution means is a power control device that determines the reference value every predetermined time T.
3. In the power control apparatus according to 1 or 2,
The distribution means is a power control device that determines the reference value based on a frequency component of the output required power and storage battery group information related to the storage battery group.
4). In the power control apparatus according to 3,
The distributing means includes
Based on the storage battery group information, determine the upper limit of power that can be distributed to the storage battery group,
It is determined whether the integrated value of the output required power from the smallest fluctuation cycle t ₀ to the fluctuation cycle t ₁ and the upper limit satisfy a predetermined condition, and the fluctuation cycle t ₁ satisfying the predetermined condition is set as the reference value. Power control device.
5. 4. In the power control apparatus according to 4,
Said dispensing means, if it exceeds the upper limit the variation period t ₁ is determined in advance, the power control device for the upper limit value and the reference value.
6). In the power control device according to 4 or 5,
The distribution means is a power control device that determines a total of rated outputs of the storage batteries as an upper limit of power that can be distributed to the storage battery group.
7). In the power control device according to 4 or 5,
The distribution means is a power control device that determines a total of LFC output upper limits of each storage battery as an upper limit of power that can be distributed to the storage battery group.
8). In the power control device according to claim 7,
The distribution means is a power control device that determines a value obtained by subtracting the predicted power consumption of each power consumer from the rated output of each storage battery as the LFC output upper limit of each storage battery.
9. In the power control device according to claim 7,
The distribution means determines a value obtained by subtracting the Δf control output upper limit of each storage battery from the rated output of each storage battery as the LFC output upper limit of each storage battery.
10. In the power control device according to claim 7,
The distribution means is a power control apparatus that determines a value obtained by subtracting the predicted power consumption of each power consumer and the Δf control output upper limit of each storage battery from the rated output of each storage battery as the LFC output upper limit of each storage battery.
11. In the power control apparatus according to 3,
The distribution unit is a power control apparatus that further determines the reference value based on a past frequency component of the output required power and a total demand amount of a past power system.
12 Computer
A determination step of determining the required output power based on the frequency deviation of the power system;
Distributing a component that varies with a period greater than a reference value to a generator group based on a frequency component of the output required power, and distributing a component that varies with a period equal to or less than the reference value to a storage battery group;
Run
In the distribution step, a power control method for dynamically changing the reference value.
13. Computer
Determining means for determining the required output power based on the frequency deviation of the power system;
Distributing means for distributing a component that varies with a period greater than a reference value to a generator group based on a frequency component of the output required power, and for distributing a component that varies with a period less than the reference value to a storage battery group,
Function as
The distribution means is a program that dynamically changes the reference value.

1A processor 2A memory 3A I / O I / F
4A peripheral circuit 5A bus 1 central power supply command station 2 first power plant 3 second power plant 4 storage battery charge / discharge command station 5 power customer system group 6 power system 10 power control device 11 determination unit 12 distribution unit

Claims (13)

Determining means for determining the required output power based on the frequency deviation of the power system;
Distributing means for distributing a component that fluctuates with a period greater than a reference value to a generator group based on a frequency component of the output required power, and for distributing a component that fluctuates with a period equal to or less than the reference value to a storage battery group;
Have
The distribution means is a power control apparatus that dynamically changes the reference value. The power control apparatus according to claim 1,
The determining means determines the output required power every predetermined time T,
The distribution means is a power control device that determines the reference value every predetermined time T. The power control apparatus according to claim 1 or 2,
The distribution means is a power control device that determines the reference value based on a frequency component of the output required power and storage battery group information related to the storage battery group. The power control apparatus according to claim 3,
The distributing means includes
Based on the storage battery group information, determine the upper limit of power that can be distributed to the storage battery group,
It is determined whether the integrated value of the output required power from the smallest fluctuation cycle t ₀ to the fluctuation cycle t ₁ and the upper limit satisfy a predetermined condition, and the fluctuation cycle t ₁ satisfying the predetermined condition is set as the reference value. Power control device. The power control apparatus according to claim 4,
Said dispensing means, if it exceeds the upper limit the variation period t ₁ is determined in advance, the power control device for the upper limit value and the reference value. The power control apparatus according to claim 4 or 5,
The distribution means is a power control device that determines a total of rated outputs of the storage batteries as an upper limit of power that can be distributed to the storage battery group. The power control apparatus according to claim 4 or 5,
The distribution means is a power control device that determines a total of upper limit of LFC (load frequency control) output of each storage battery as an upper limit of power that can be distributed to the storage battery group. The power control apparatus according to claim 7, wherein
The distribution means is a power control device that determines a value obtained by subtracting the predicted power consumption of each power consumer from the rated output of each storage battery as the LFC output upper limit of each storage battery. The power control apparatus according to claim 7, wherein
The distribution means determines a value obtained by subtracting the Δf control output upper limit of each storage battery from the rated output of each storage battery as the LFC output upper limit of each storage battery. The power control apparatus according to claim 7, wherein
The distribution means is a power control device that determines a value obtained by subtracting the predicted power consumption of each power consumer and the Δf control output upper limit of each storage battery from the rated output of each storage battery as the LFC output upper limit of each storage battery. The power control apparatus according to claim 3,
The distribution unit is a power control apparatus that further determines the reference value based on a past frequency component of the output required power and a total demand amount of a past power system. Computer
A determination step of determining the required output power based on the frequency deviation of the power system;
Distributing a component that varies with a period greater than a reference value to a generator group based on a frequency component of the output required power, and distributing a component that varies with a period equal to or less than the reference value to a storage battery group;
Run
In the distribution step, a power control method for dynamically changing the reference value. Computer
Determining means for determining the required output power based on the frequency deviation of the power system;
Distributing means for distributing a component that varies with a period greater than a reference value to a generator group based on a frequency component of the output required power, and for distributing a component that varies with a period less than the reference value to a storage battery group,
Function as
The distribution means is a program that dynamically changes the reference value.

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