JP7285053B2 - Power supply and demand control device, power supply and demand control system, and power supply and demand control method - Google Patents

Description

The present invention relates to a technology for power supply and demand control.

In order to maintain stable operation of the power system, power system operators need to match the amount of power demand and the amount of power supplied from generators. For example, Patent Literature 1 and Patent Literature 2 disclose techniques related to power supply and demand adjustment.

In Patent Document 1, "a plurality of generators used as load frequency control (LFC) generators or economic load distribution control (ELD) generators and a ΔF detection unit that detects frequency variation (ΔF) in an electric power system , a ΔPT detection unit that detects an amount of change in power flow (ΔPT) in an interconnection line, and a natural energy detection unit that detects natural energy (N), and the amount of frequency change (ΔF) and the interconnection line An AR calculator that calculates the regional demand power (AR) using the power flow variation (ΔPT) and the output of the natural energy detector (N), and an AR smoothing unit that smoothes the calculated regional power demand (AR) , the target command value from the ELD schedule calculated by the AR distribution unit that distributes the smoothed regional requested power (AR) to each generator, and the distributed regional requested power (AR) and the ELD schedule calculated by the economic load distribution control (ELD) and a command unit that issues the target command value to each generator and issues a command to switch the generator to either the LFC generator or the ELD generator. ing.

In Patent Document 2, "A power management system that compensates for fluctuations in load power in a predetermined frequency band on a control target day with the output of a storage battery, wherein the load power on the control target day is compared to other time zones a storage battery control unit that controls the output of the storage battery so that the SOC value converges to the target value during the decreasing time period, and compensates for fluctuations in the load power in the predetermined frequency band." .

JP 2014-204577 A JP 2017-28861 A

In adjusting the supply and demand of electricity, it is difficult to achieve an accurate demand forecast at the stage of making a supply and demand plan. If there is an error between the actual demand and the demand forecast value in advance, the power system operator can match the supply and demand by sending appropriate control commands to the regulating power supply procured in advance to keep the system frequency within the threshold. It is possible to achieve stable operation of the system.

In recent years, a large amount of renewable energy such as solar power generation and wind power generation has been introduced into the grid. These renewable energies are accompanied by sudden power output fluctuations that are difficult to predict in advance, and as a result, it is expected that the amount of procurement of adjustment power that will be required will increase.

In response to the above problem, Patent Document 1 describes a technique for improving frequency control performance against an increase in output fluctuation due to an increase in renewable energy.

In addition, regarding the procurement of reserve capacity, there is a movement to create a market (supply and demand adjustment market) in which flexible reserve reserves and transactions can be conducted by 2020, and to secure reserve reserves more efficiently. there is In this context, in addition to thermal power generation and hydroelectric power generation, which have conventionally been used as regulating power sources, the following new regulating power sources are being considered. Examples include storage battery control, pump-up of pumped storage power generation, charge and discharge control of electric vehicles, demand response (hereinafter referred to as "DR"), microgrid control including the above multiple means, virtual power plant ( Virtual Power Plant (hereinafter referred to as VPP) control. As the reserve capacity that can be procured decreases due to the suspension and abolition of thermal power generation and hydroelectric power generation, it is expected that efficient procurement of reserve capacity will be realized by utilizing these new reserve capacity.

On the one hand, these new regulatable power sources have diverse control performance and operational constraints. In particular, when an energy storage power supply such as a storage battery or a variable speed pumped storage generator is used for frequency adjustment control, the control output range of each adjustment power supply depends on the operating state. For example, when the storage battery is in a state of 100% charge, the storage battery cannot control the charging direction more than the current state. can be considered small. In relation to the above background, a correction control technique has been devised for maintaining the operating state (SOC: State of Charge) of the storage battery at the optimum operating point.

For example, Patent Literature 2 describes SOC correction control for controlling the output of the storage battery so that the SOC value converges to a target value.

However, the SOC correction control of Patent Document 2 may cause control in the direction opposite to the direction of supply and demand control that contributes to frequency control. In addition, in order to prevent the SOC from deviating from the optimum operating point, the total amount of control increases, and there is a possibility that the operating cost will increase. Therefore, it is necessary to calculate a control plan that achieves both reduction of the control amount by optimizing frequency control and SOC operating point correction control.

Further, with the technique described in Patent Document 1, it is not possible to realize both the reduction of the control amount and the SOC operating point correction control.

An object of the present invention is to realize supply and demand control that observes operational constraints while reducing operational costs.

In order to solve the above-mentioned problems, one of the representative present inventions is "based on the actual system information, which is the past measured value of the power system, and the predicted system information, which is the future predicted value. A control power distribution calculation unit that calculates a control power allocation plan based on the required control power estimation unit that calculates the control power estimated value and system operation information including the operation state of the energy storage power source and the control power estimated value; An electric power supply and demand control device comprising: a control power distribution evaluation unit that calculates an evaluation value of the control power distribution plan based on the power distribution plan and system operation standard information."

ADVANTAGE OF THE INVENTION According to this invention, the supply and demand control which observes operation|movement restrictions can be implement|achieved, reducing operation cost.

1 is an example of a block diagram showing a functional configuration of a power supply and demand control device according to the present invention; FIG. 1 is an example of a configuration diagram of a power supply and demand control system according to the present invention; FIG. It is an example of the required control power estimated value calculation flowchart of the electric power supply and demand control apparatus which concerns on this invention. It is an example of the data structure of the required control power estimated value which is an input of the power supply and demand control apparatus according to the present invention. It is an example of the data structure of the online system operation information which is the input of the power supply and demand control device according to the present invention. It is an example of the data structure of the electric power market bidding information which is the input of the electric power supply and demand control device according to the present invention. It is an example of the data structure of the control power procurement information that is the output of the power supply and demand control device according to the present invention. It is an example of the data structure of the demand-supply control plan information which is the output of the power demand-supply control apparatus according to the present invention. FIG. 2 is a conceptual diagram of control power distribution related to the power supply and demand control device according to the present invention; It is an example of the data structure of the operation standard information which is the input of the power supply and demand control device according to the present invention. It is an example of a flow chart of adjustment force distribution evaluation of the power supply and demand control device according to the present invention. It is an example of a data structure of control force distribution evaluation information that is an output of the power supply and demand control device according to the present invention. It is an example of a screen display of the adjustment force distribution state of the power supply and demand control device according to the present invention.

Preferred examples for carrying out the present invention will be described below. It should be noted that the following is merely an example of implementation, and is not intended to limit the invention itself to the following specific contents.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of a functional configuration diagram of a power supply and demand control device to which one embodiment of the present invention is applied. The power supply and demand control device in this embodiment includes a power supply and demand control unit 10 and information storage units 21 to 24 .

The power supply and demand control unit 10 includes a required control power estimation unit 11 that calculates a required control power estimated value that is an estimated value of the required control power, a control power distribution calculation unit 12 that calculates a control power distribution plan, and a control power distribution. and a control force distribution evaluation unit 13 that calculates an evaluation value of the plan.

The required adjustment force estimator 11 will be described with reference to FIGS. 3 and 4. FIG. The required controllability estimating unit 11 estimates the required controllability from the required controllability estimated values derived from demand fluctuations, power flow fluctuations in other grids, and renewable energy fluctuations.

FIG. 3 shows an example of a flow in which the required control force estimator 11 calculates the required control force estimated value.

First, the required control power estimating unit 11 acquires actual system information related to supply and demand control from the information storage unit 22 (S31).

Here, the performance system information includes at least one measured value of frequency fluctuation, power flow fluctuation, and power generation fluctuation at a certain point in the past. In addition, the performance system information includes information related to supply and demand fluctuations. Examples of information related to supply and demand fluctuations include weather (weather, temperature, etc.), grid flow values at pre-designated points, and the like.

Next, the required control power estimating unit 11 classifies the performance system information acquired in S31 according to supply and demand conditions (S32). Here, the supply and demand condition includes information estimated to affect the supply and demand fluctuation pattern. Examples of supply and demand conditions include, but are not limited to, day types (weekdays, holidays, special days, etc.), weather (weather, temperature, etc.), and time/time zones (morning, noon, evening, night, etc.).

Next, for each demand-supply condition classified in S32, a supply-demand fluctuation prediction model is created using actual system data corresponding to the demand-supply condition (S33). To create a supply and demand fluctuation prediction model, input information related to supply and demand fluctuations, at least one of frequency fluctuations, interconnection power flow fluctuations, and power generation fluctuations. , machine learning, and multivariate analysis. The forecast model may be created separately for each supply and demand fluctuation. Also, a prediction model may be constructed that outputs the total supply and demand fluctuation amount calculated by inputting the actual value of each supply and demand fluctuation into (Equation 1).

ΔG = ΔL + ΔLw – KΔF (Formula 1)
Here, ΔG: total supply and demand fluctuation, ΔL: interconnection power flow fluctuation, ΔLw: power generation fluctuation, K: system constant, ΔF: frequency fluctuation.

Next, in the supply and demand fluctuation prediction model created in S33, the predicted value or the actual value at the time of the prediction target is added to the predicted system information stored in the information storage unit 21 or the actual system information stored in the information storage unit 22. Based on the input, the predicted value of the fluctuation amount of supply and demand at that time is calculated (S34).

Here, the predicted system information includes at least one of a predicted power generation amount of renewable energy such as wind power generation and solar power generation, a weather forecast value, and control power supply operating plan information.

FIG. 4 shows an example of the information configuration of the supply and demand fluctuation amount prediction value. In the example of FIG. 4, each predicted value of frequency fluctuation, interconnection power flow fluctuation, power generation amount fluctuation, and total supply and demand fluctuation is shown for each fluctuation period as the predicted value of the supply and demand fluctuation amount.

Further, in the information configuration example of the supply and demand fluctuation amount forecast value in FIG. 4, the prediction error related to the total supply and demand fluctuation amount is included as the total supply and demand fluctuation error. The total supply and demand fluctuation error can be calculated as a 3σ value (σ represents the standard deviation) when the error distribution is assumed to be a normal distribution, for example, by statistically analyzing the difference between the actual system information and the required control power estimated value. can.

The required controllability estimated value is calculated as the total supply and demand fluctuation amount for each fluctuation period, or as a value obtained by adding the total supply and demand fluctuation error to the total supply and demand fluctuation amount for each fluctuation period (S35). When calculating the required control force estimated value for each fluctuation period, the time-series data of the required control force estimated value having a certain length of time is calculated by applying a frequency decomposition method such as Fourier transform or wavelet transform.

The necessary control force estimation unit 11 may correct the necessary control force estimated value using the calculation result of the control force distribution evaluation unit 13, which will be described later. At this time, the control power distribution evaluation unit 13 evaluates a control power distribution plan described later based on the cost index and the operation standard index from the control power distribution evaluation information, and the necessary control power estimation unit 11 evaluates the necessary adjustment based on the evaluation result. The force is recalculated, and the calculated result is used as the required adjustment force estimate. By determining the reserve control power amount based on this estimated value of necessary control power, it is possible to reduce the procurement amount of control power that does not need to be secured while suppressing frequency fluctuations.

The control force distribution calculation device 12 will be described with reference to FIGS. 5 to 9. FIG. The control force distribution calculation unit 12 calculates a control force distribution plan using the necessary control force estimated value calculated by the necessary control force estimation unit 11 and the system operation information stored in the information storage unit 23 .

The system operation information includes at least one of on-line system operation information, power market bidding information, and balancing power procurement information calculated as a result of a contract based on the power market bidding information.

The online grid operation information includes at least current power output information of each power source, for example, frequency measurement values, interconnected power flow measurement values, renewable energy power generation measurement values, meteorological measurement values, and control power supply operating status information. Contains any one. In addition, if the electric power auction market information includes storage batteries, variable speed pumped storage power generation, or other energy storage power sources as bidding targets, it represents the operation status such as SOC information related to power sources including storage batteries, water storage amount information related to variable speed pumped storage power generation, etc. The information can be included as online system operation information.

An example of online system operation information for a regulating power supply including energy storage power is shown in FIG. The SOC information may include the deviation from the initial state calculated as the cumulative sum of the controlled variables for each generator included in the past control history information.

An example of power market bidding information is shown in FIG. The electric power market bidding information includes control performance of the controllability power supply procurable through the electric power market and information on controllability unit prices as operating costs. In the example of FIG. 6, information on maximum control amount, maximum output change speed, duration, and start-up possible time is included as an index representing the control performance of the control power supply.

FIG. 7 shows an example of the coordination power procurement information. In the example of FIG. 7, the control power procurement information includes the amount of procurement for which the control power sources A, B, C, . . . Procurement volume and Based on the required controllability estimated value calculated by the required controllability estimation unit 11, the procurement amount is determined so that the total procurement amount exceeds the required controllability for each fluctuation cycle.

The controllable power distribution calculation unit 12 adjusts the controllability power source so as to procure the necessary controllability based on the controllability procurement information for the controllability required for each fluctuation cycle calculated by the controllability estimation unit 11 . Create a control power distribution plan that selects For example, based on the maximum output change rate included in the electric power market bidding information, candidates for control power sources to be assigned to each fluctuation period are selected, and control power sources to be controlled are determined according to the merit order based on control power unit prices. At this time, when the total sum of the required control power estimated values shows a tendency of increasing demand, control is performed to increase the output in order from the control power power supply with the lowest control power unit price. On the other hand, when the sum total of the required control power estimated values shows a tendency of decreasing demand, control is performed to decrease the output in descending order of the control power unit price of the control power supply. When the output of the selected controllability power supply reaches the control upper and lower limits, the controllability power supply that is the next control candidate in the order of merit is selected. The above steps are repeated to add control power sources until the required control power is satisfied, and the final control power distribution plan is determined.

Note that the control power distribution calculation unit 12 may calculate the control power distribution plan only when the difference between the predicted system information and the online system operation information exceeds a preset threshold value.

FIG. 8 shows an example of supply and demand control plan information related to control of each power source based on the control power distribution plan. In the example of FIG. 8, for the selected adjustable power supplies (adjustable power supplies A, B, and C in FIG. 8), the control type including information on the control purpose and the secured frequency fluctuation period, the control amount, the output change rate , control start time, and control end time are defined as the supply and demand control plan.

FIG. 9 shows a conceptual diagram of the control force distribution plan. In the example of FIG. 9, the solid line represents the required adjustability in each fluctuation cycle, and shows that the frequency control by the adjustability power sources G1 and G2 secures the adjustability amount P1 with respect to the required adjustability in the fluctuation cycle C1. show.

The adjustment force distribution evaluation unit 13 will be described with reference to FIGS. 10 to 13. FIG. The control power distribution evaluation unit 13 calculates an evaluation value of the control power distribution plan based on the control power distribution plan information calculated by the control power distribution calculation unit 12 and the system operation standard information stored in the information storage unit 24. .

The system operation standard information includes operation standards related to at least one of frequency fluctuation, supply and demand deviation, and SOC operation standards. An example of system operation standard information is shown in FIG. Each operation standard is defined with respect to the numerical value of the online system operation information that corresponds to each item, including information on the allowable range to be satisfied and countermeasures to be taken in the event of deviation. The reference frequency, the SOC operation reference point, the allowable range of each item, and the measures to be taken in case of deviation are set in advance.

FIG. 11 shows an example of the calculation flow of the evaluation value of the control force distribution plan.

First, control force distribution plan information calculated by the control force distribution calculator 12 is obtained (S101).

Next, an evaluation value for the acquired control power distribution plan information is calculated and used as control power distribution evaluation information (S102).

An example of control force distribution evaluation information is shown in FIG. In the example of FIG. 12, the adjustability distribution evaluation information includes at least one cost index of control amount, control distribution, control cost (operation cost), frequency deviation performance, frequency standard deviation rate, SOC performance, SOC standard including at least one operating criteria indicator of the deviation rate;

The control cost Ccont can be calculated using (Equation 2). Here, Price (τ, g) is the frequency control adjustment power unit price when performing frequency control with a fluctuation period τ by the power supply g, Energy (τ, g) is when performing frequency control with a fluctuation period τ by the power supply g represents the control amount of

Ccont = Σ (Price (τ, g) * Energy (τ, g)) ・・・(Formula 2)

Also, the frequency reference deviation rate freq_rate can be calculated using (Formula 3). Here, Tf represents the number of measurement points within the evaluation time span, and Tfout represents the number of measurement points at which the frequency measurement value exceeds the operating standard within the evaluation time span.

freq_rate = Tfout / Tf (Formula 3)

Similarly, the SOC standard deviation rate SOC_rate can be calculated from (Equation 4) using the number of measurement points Tsoc within the evaluation time span and the number of measurement points Tsocout at which the SOC measurement value exceeds the operating standard within the evaluation time span. .

SOC_rate = Tsocout / Tsoc (Formula 4)

In addition to the evaluation values calculated using the above (Formula 3) and (Formula 4), statistical analysis values such as the maximum value, minimum value, average value, and 95th percentile value of the frequency measurement value or SOC measurement value within the evaluation time width may be calculated and used as control force distribution evaluation information.

Here, the frequency measurement value and the SOC measurement value used for calculating the frequency standard deviation rate and the SOC standard deviation rate may use the measurement information included in the actual system information. Further, the frequency measurement value and the SOC measurement value may be calculated by a frequency analysis simulation using a predetermined system model and operation information such as generator output as inputs.

Returning to FIG. 11, based on the control power distribution evaluation information calculated at S102, it is determined whether or not the control power distribution plan acquired at S101 satisfies the system operation standard (S103).

In S103, if the control power allocation plan does not satisfy the system operation criteria (S103N), the control power allocation calculation unit 12 corrects the control power allocation plan (S104), and the control power allocation evaluation unit 13 evaluates the corrected plan. Calculate the evaluation value.

An optimum allocation plan for correcting the control power allocation plan can be calculated by solving an optimization problem with the necessary control power estimated value and system operation information as inputs. The optimization problem is set as a problem of calculating control force distribution that minimizes the control cost Ccont of (Equation 2) within the range of satisfying the constraints represented by (Equation 5) to (Equation 7) below. Here, SOC(t) is the SOC measured value at time t, SOCref is the SOC operating reference value, σsoc is a constant representing the allowable distance for deviation of the SOC measured value from the SOC operating reference value, and freq(t) is time t. , freqref is the reference frequency, σf is a constant representing the permissible distance for the deviation of the frequency measurement value from the frequency operation reference value, and Reg (τ) is the estimated adjustment force required for the variation width τ.

|SOC(t) - SOCref| = σsoc (Formula 5)
|freq(t) - freqref| = σf (Formula 6)
Reg (τ) = ΣEnergy (τ, g) (Formula 7)

On the other hand, if the control power allocation plan satisfies the system operation standard in S103 (S103Y), the control power allocation evaluation process is terminated.

FIG. 13 shows an example of a display screen of the calculated control power allocation evaluation value and control power allocation plan information. The upper portion of the display screen shows a time-series graph of the control amounts of the control power sources G1, G2, and G3 and the SOC state of the control power source G1 at times t1 and t2. At the bottom of the display screen shown in FIG. 13, the control amount of the control power sources G1 and G2 at times t1 and t2, the total control amount and the total control cost in all control power sources, and each control power within a predetermined time span are displayed. The total control amount and total control cost of the power supply are shown.

FIG. 2 is a configuration diagram of a power supply and demand control system to which one embodiment of the present invention is applied. The power supply and demand control system in this embodiment includes a power supply and demand control device 10, a generator 101, a substation 102, a phase modifying device 103, a power load 104, an external power system 105, measuring devices 121a and 121b, , an information communication network 108 , a power supply and demand control device 200 and a market management system 300 .

The generator 101 is a generator that generates electric power, for example, a generator that generates electric power by any power generation method including thermal power generation, hydroelectric power generation, nuclear power generation, solar power generation, wind power generation, biomass power generation, and tidal current power generation. is. The power generator 101a is a large-scale power generator installed on the high voltage side of the electric power system and includes thermal power generation, hydraulic power generation, nuclear power generation, and the like. It is transmitted to the power supply and demand control device 200 . The power generator 101a also receives control command information transmitted from the power supply and demand control device 200 through the measuring device 21a and the information communication network 108, and changes the system state quantity including the power generation amount according to the control command information.

The generator 101b is, for example, a small and medium-sized generator installed on the low-voltage side of the power system, including photovoltaic power generation, wind power generation, and cogeneration. The quantity is transmitted to the power supply and demand control device 200 .

The substation 102 is installed between transmission lines in the power system, changes the voltage value of the power transmitted from the high voltage side where the generator 101a, which is a large-scale generator, is installed, and the power load 104 is installed. power to the low voltage side of the The substation 102 is connected with phase modifying devices 103 such as power capacitors and shunt reactors.

The phase modifying device 103 is a device that controls voltage distribution in the power system by changing reactive power in the power system, and includes power capacitors, shunt reactors, STATCOMs, SVCs, and the like. A part of the phase modifying device 103 receives the control command information transmitted from the power supply and demand control device 200 through the measuring device 121c and the information communication network 108, and changes the system state quantity including the power generation amount according to the control command information. .

The power load 104 represents a home, factory, building, facility that includes electric motors, lighting fixtures, etc. that consume power therein.

The external power system 105 is an external power system that cannot be controlled by the power supply and demand control device 200, and is connected to its own system via an interconnection line.

The measuring devices 121a, 121b, . The measured system state quantity is transmitted to the power supply and demand control device 200 through the information communication network 108 .

The information communication network 108 is a network capable of transmitting data bi-directionally. The information communication network 108 is composed of, for example, a wired network, a wireless network, or a combination thereof. The information communication network 108 may be the so-called Internet, or may be a dedicated line network.

The power supply and demand control device 10 is a device for realizing the power supply and demand control function shown in FIG. The power supply and demand control device 10 receives the system state quantities measured by the measuring devices 21a, 21b, . . . In addition, the power supply and demand control device 10 transmits control command information calculated using the transmitted system state quantity and internally accumulated information to the measuring device 21 through the information communication network 108 .

As an internal configuration of the power supply and demand control device 10 , a CPU (Central Processing Unit) 201 , a display device 202 , a communication means 203 , an input means 204 , a memory 205 and a storage device 206 are connected to a bus line 211 . ing.

The CPU 201 executes a calculation program to calculate system states, generate control signals, and the like.

The memory 205 temporarily stores image data for display, calculation result data of the system state, and the like, and is configured using a RAM (Random Access Memory) or the like, for example. The memory 205 generates necessary image data by the CPU 201 and displays it on the display device 202 .

The communication means 203 acquires system state quantities such as power flow values and voltage values from the measuring device 21 and the measuring device 21 through the communication network 108 .

A user can set/change parameters such as various thresholds through a predetermined interface of the input means 204 to appropriately set the operation of the power supply and demand control device 200 . Also, the user can select the type of data to be confirmed through a predetermined interface of the input means 204 and display it on the display device 202 .

A storage device 206 holds various programs and data. The storage device 206 is configured by, for example, an HDD (Hard Disk Drive), flash memory, or the like. The storage device 206 holds, for example, programs and data capable of realizing various functions to be described later. Programs and data stored in the storage device 206 are read and executed by the CPU 201 as necessary. Note that the storage device 206 is composed of various databases DB.

The power market management system 300 executes transaction management of the power market in which power generation companies and power transmission/distribution companies trade power. There are various forms of market operation methods depending on the type of product to be traded. In this embodiment, the spot market completes bidding and contracts one day before the supply and demand control, and adjustments are made on the day of the supply and demand control. It assumes a market operation form that includes both or either of the real-time markets that additionally trade power. The power market management system 300 uses the information communication network 108 to collect power trading information including the power selling price, power selling amount, control performance and control requirements of the power source to be sold, and adjustment power defined by the procurement target, procurement schedule, etc. It transmits and receives the procurement plan to and from the power supply and demand control system 200 .

A power supply and demand control device according to the present invention and a power supply and demand control system to which the same is applied take into account the required controllability according to the operation status of the electric power system and future system forecast information, and adjustability control amount and By calculating the control force allocation plan including the allocation of the SOC correction control amount, it is possible to realize supply and demand control that observes operational constraints while reducing operational costs.

In addition, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the described configurations. In addition, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Moreover, it is possible to add, delete, or replace a part of the configuration of each embodiment with another configuration.

10 power supply and demand control device 11 required controllability estimation unit 12 controllability distribution calculation unit 13 controllability distribution evaluation unit 21-24 information storage unit 101 generator 102 substation 103 phase modifying device 104 distributed power generation device 105 external power system 108 information Communication network 121 System measuring device 300 Power market management system

Claims (3)

Actual system information including measured values of at least one of frequency fluctuation (Hz), power flow fluctuation (MW), and power generation fluctuation (MW) at a certain point in the past of the power system, and prediction of power generation amount of renewable energy at least one of demand fluctuations, other grid-interconnected power flow fluctuations, and fluctuations in the amount of renewable energy generated based on prediction system information including one or more of values, weather forecast values, and control power supply operation plan information A required control power estimation unit that calculates a required control power estimated value derived from one for each fluctuation period;
Based on the required controllability estimated value and system operation information including the operation state of the energy storage power supply, the controllability required for each fluctuation period calculated by the required controllability estimation unit is calculated based on the controllability procurement information. A control reserve allocation plan that selects control reserve power sources to achieve the procurement of necessary reserve reserves is calculated by sequentially selecting the reserve reserve power sources allocated to each fluctuation cycle according to the merit order based on the reserve reserve unit price. a calculation unit;
A control power allocation evaluation unit that calculates an evaluation value of the control power allocation plan based on the control power allocation plan and a system operation standard representing an operation standard of the electric power system;
with
The demand fluctuation represents the fluctuation (MW) of power demand in the power system,
The other system refers to a power system external to the power system connected to the power system by an interconnection line,
said renewable energy refers to wind power and solar power,
The adjustment capacity represents power (MW) for supply and demand adjustment procured to compensate for the shortage of power supply in the power system due to fluctuations in the power output of the renewable energy,
The required controllability estimated value is the total supply and demand fluctuation amount (MW) for each fluctuation period in the electric power system, or the total supply and demand fluctuation amount (MW) for each fluctuation period in the electric power system, and the prediction error of the total supply and demand fluctuation amount. is the value obtained by adding
the energy storage power source is at least one of a storage battery and a variable speed pumped hydro generator;
The operating state of the energy storage power supply represents at least one of the operating state (SOC: State of Charge) of the storage battery and the water storage amount of the variable speed pumped storage generator,
the evaluation value of the control force allocation plan includes at least one of a frequency standard deviation rate (%) and an SOC standard deviation rate (%);
The frequency standard deviation rate (%) is based on a value obtained by dividing the number of measurement points (Tfout) at which the frequency measurement value exceeds the operating standard within the evaluation time span by the number of measurement points (Tf) within the evaluation time span. calculated as
The SOC standard deviation rate (%) is based on a value obtained by dividing the number of measurement points (Tsocout) at which the SOC measured value exceeds the operation standard within the evaluation time span by the number of measurement points (Tsoc) within the evaluation time span. calculated as
Power supply and demand controller. a measuring device that measures the state of the power system;
performance system information including at least one measurement value of frequency fluctuation (Hz), power flow fluctuation (MW), and power generation fluctuation (MW) at a certain point in the past of the power system output from the measuring device; Demand fluctuations, other grid-connected power flow fluctuations, and power generation from renewable energy based on prediction system information including at least one of renewable energy power generation forecast values, weather forecast values, and control power supply operation plan information a required control power estimating unit that calculates a required control power estimated value derived from at least one of the fluctuations of the amount for each fluctuation period;
Based on the required controllability estimated value and system operation information including the operation state of the energy storage power supply, the controllability required for each fluctuation period calculated by the required controllability estimation unit is calculated based on the controllability procurement information. A control reserve allocation plan that selects control reserve power sources to achieve the procurement of necessary reserve reserves is calculated by sequentially selecting the reserve reserve power sources allocated to each fluctuation cycle according to the merit order based on the reserve reserve unit price. a calculation unit;
A control power allocation evaluation unit that calculates an evaluation value of the control power allocation plan based on the control power allocation plan and a system operation standard representing an operation standard of the electric power system;
with
The demand fluctuation represents the fluctuation (MW) of power demand in the power system,
The other system refers to a power system external to the power system connected to the power system by an interconnection line,
said renewable energy refers to wind power and solar power,
The adjustment capacity represents power (MW) for supply and demand adjustment procured to compensate for the shortage of power supply in the power system due to fluctuations in the power output of the renewable energy,
The required controllability estimated value is the total supply and demand fluctuation amount (MW) for each fluctuation period in the electric power system, or the total supply and demand fluctuation amount (MW) for each fluctuation period in the electric power system, and the prediction error of the total supply and demand fluctuation amount. is the value obtained by adding
the energy storage power source is at least one of a storage battery and a variable speed pumped hydro generator;
The operating state of the energy storage power supply represents at least one of the operating state (SOC: State of Charge) of the storage battery and the water storage amount of the variable speed pumped storage generator,
the evaluation value of the control force allocation plan includes at least one of a frequency standard deviation rate (%) and an SOC standard deviation rate (%);
The frequency standard deviation rate (%) is based on a value obtained by dividing the number of measurement points (Tfout) at which the frequency measurement value exceeds the operating standard within the evaluation time span by the number of measurement points (Tf) within the evaluation time span. calculated as
The SOC standard deviation rate (%) is based on a value obtained by dividing the number of measurement points (Tsocout) at which the SOC measured value exceeds the operation standard within the evaluation time span by the number of measurement points (Tsoc) within the evaluation time span. calculated as
Power supply and demand control system. Actual system information including measured values of at least one of frequency fluctuation (Hz), power flow fluctuation (MW), and power generation fluctuation (MW) at a certain point in the past of the power system, and predicted power generation amount of renewable energy , weather forecast values, control power supply operation plan information, and at least one of demand fluctuations, other grid-connected power flow fluctuations, and fluctuations in the amount of power generated by the renewable energy. A step of calculating the required adjustment force estimate derived from for each fluctuation period;
In the step of calculating the required controllable power estimated value based on the required controllable power estimated value and system operation information including the operating state of the energy storage power supply, the controllability required for each fluctuation cycle is calculated in the controllability procurement information. A step of calculating a control power allocation plan in which control power sources are selected so as to achieve procurement of control power required based on the calculation by sequentially selecting control power sources to be allocated to each fluctuation cycle according to the merit order based on the control power unit price. and,
a step of calculating an evaluation value of the control power allocation plan based on the control power allocation plan and a system operation standard representing an operation standard of the electric power system;
with
The demand fluctuation represents the fluctuation (MW) of power demand in the power system,
The other system refers to a power system external to the power system connected to the power system by an interconnection line,
said renewable energy refers to wind power and solar power,
The adjustment capacity represents power (MW) for supply and demand adjustment procured to compensate for the shortage of power supply in the power system due to fluctuations in the power output of the renewable energy,
The required controllability estimated value is the total supply and demand fluctuation amount (MW) for each fluctuation period in the electric power system, or the total supply and demand fluctuation amount (MW) for each fluctuation period in the electric power system, and the prediction error of the total supply and demand fluctuation amount. is the value obtained by adding
the energy storage power source is at least one of a storage battery and a variable speed pumped hydro generator;
The operating state of the energy storage power supply represents at least one of the operating state (SOC: State of Charge) of the storage battery and the water storage amount of the variable speed pumped storage generator,
the evaluation value of the control force allocation plan includes at least one of a frequency standard deviation rate (%) and an SOC standard deviation rate (%);
The frequency standard deviation rate (%) is based on a value obtained by dividing the number of measurement points (Tfout) at which the frequency measurement value exceeds the operating standard within the evaluation time span by the number of measurement points (Tf) within the evaluation time span. calculated as
The SOC standard deviation rate (%) is based on a value obtained by dividing the number of measurement points (Tsocout) at which the SOC measured value exceeds the operation standard within the evaluation time span by the number of measurement points (Tsoc) within the evaluation time span. calculated as
Power supply and demand control method.

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