JP2021035277A - Power plant operation planning device and power plant operation planning method - Google Patents

Abstract

To formulate an operation plan for a power plant so as to meet power demand and heat demand, and secure the supply and demand adjustment power on the basis of adjustment power information.SOLUTION: A power plant operation planning device with a power generation device and an energy storage device includes a demand plan acquisition unit 210 that acquires a power demand plan and a heat demand plan, an adjustment power information acquisition unit 240 that acquires adjustment power information regarding at least one of the up adjustment power and the down adjustment power as supply and demand adjustment power, and an operation planning unit 250 that meets the power demand plan and heat demand plan and formulates an operation plan of the power generation device and energy storage device so as to minimize the operating cost of the power plant, and the operation planning unit 250 formulates an operation plan so as to secure the supply and demand adjustment power on the basis of the adjustment power information.SELECTED DRAWING: Figure 4

Description

The present application relates to a power plant operation planning device and a power plant operation planning method.

In April 2020, as part of the power system reform, general electric power companies will be legally separated into general power transmission and distribution companies, power generation companies and retail electric power companies (separation of power transmission and distribution). The power generation sector is expected to become a more competitive sector than ever before, and power generation companies are required to generate electricity more efficiently and supply electricity to retail electricity companies. Even companies with private power generation facilities can supply the electricity and heat required by the factory more efficiently, and use the surplus electricity from the electric power company or the Japan Electric Power Exchange (for example, Japan Electric Power Exchange (JEPX)). There is a movement to generate further profits by selling electricity to Electric Power Exchange)). In recent years, studies have been conducted to improve the operability or efficiency of power plants by installing energy storage equipment.

For example, in Patent Document 1, as an energy supply / demand adjusting device, a thermal DR information collecting unit that acquires demand response information including at least heat demand response conditions that a consumer can respond to, and an electric heating demand that predicts the electric heating demand of the consumer. Some have a forecasting unit and a schedule creation unit that creates an operation schedule and a command schedule including a heat demand response schedule that commands the consumer by optimizing calculation that includes demand response information and electric heat demand as parameters. It was.

JP-A-2017-20426

Due to the separation of power transmission and distribution, it will be necessary for the general power transmission and distribution business to maintain the frequency and supply-demand balance of the power system, which was the role of the former general power business. General power transmission and distribution business operators will procure power sources for frequency adjustment and supply and demand balance adjustment by purchasing electricity from the supply and demand adjustment market that will be created in the future.

In addition to supplying the generated power to the retailer or the wholesale power trading market (JEPX, etc.), the power generation company sells the surplus power generation capacity to the supply and demand adjustment market as an increase adjustment power or a decrease adjustment power as a supply and demand adjustment power. You will be able to generate more profits.

The energy supply and demand adjustment device of Patent Document 1 creates an operation schedule by an optimization calculation that includes demand response information and electric heat demand as parameters, but considers an increase adjustment force or a decrease adjustment force as the supply and demand adjustment force. And I haven't created an operation schedule.

The present application discloses a technique for solving the above-mentioned problems, and operates a power plant in consideration of raising or lowering adjustment power as supply and demand adjusting power while satisfying electric power demand and heat demand. Provided are a power plant operation planning device capable of making a plan and a power plant operation planning method.

The power plant operation planning device disclosed in the present application is
An operation planning device for a power plant that has power generation equipment and energy storage equipment.
Demand plan acquisition department that acquires power demand plan and heat demand plan,
The Coordination Power Information Acquisition Department, which acquires adjustment power information regarding at least one of the up adjustment power and the down adjustment power as the supply and demand adjustment power,
It is provided with an operation planning unit that satisfies the power demand plan and the heat demand plan and formulates an operation plan of the power generation facility and the energy storage facility so as to minimize the operating cost of the power plant.
The operation planning unit formulates the operation plan so as to secure the supply and demand adjustment power based on the adjustment power information.
In addition, the method for formulating an operation plan for a power plant disclosed in the present application is as follows.
It is a method of planning the operation of a power plant that has power generation equipment and energy storage equipment.
Demand plan acquisition process to acquire power demand plan and heat demand plan,
The adjustment power information acquisition process for acquiring adjustment power information regarding at least one of the up adjustment power and the down adjustment power as the supply and demand adjustment power, and
The power generation equipment and the energy storage so as to satisfy the power demand plan and the heat demand plan, minimize the operating cost of the power plant, and secure the supply and demand adjustment power based on the adjustment power information. It is equipped with an operation planning process for formulating an operation plan for equipment.
In addition, the method for formulating an operation plan for a power plant disclosed in the present application is as follows.
It is a method of planning the operation of a power plant that has power generation equipment and energy storage equipment.
Demand plan acquisition process to acquire power demand plan and heat demand plan,
The adjustment power information acquisition process for acquiring adjustment power information regarding at least one of the up adjustment power and the down adjustment power as the supply and demand adjustment power, and
The demand response acquisition process for acquiring the power and heat demand response information of the factory attached to the power plant, and
Satisfy the power demand plan and the heat demand plan, minimize the operating cost of the power plant, and secure the supply and demand adjustment power based on the adjusting power information and the power and heat demand response information. It is provided with an operation planning process for formulating an operation plan for the power generation facility and the energy storage facility.

According to the operation planning device of the power plant and the operation planning method of the power plant disclosed in the present application, the power plant satisfies the power demand and the heat demand, and also considers the up adjustment power or the down adjustment power as the supply and demand adjustment power. Can make an operation plan for.

FIG. 5 is a conceptual diagram of a power plant targeted by the operation planning device for the power plant according to the first embodiment of the present application. It is a conceptual diagram for demonstrating the mechanism of securing the supply and demand adjustment ability by Embodiment 1 of this application. It is a conceptual diagram for demonstrating the mechanism of securing the supply and demand adjustment ability by Embodiment 1 of this application. It is a functional block diagram which shows the operation planning apparatus of the power plant by Embodiment 1 of this application. It is a block diagram which shows the hardware composition of the operation planning apparatus of the power plant according to Embodiment 1 of this application. It is a flowchart which shows the operation of the operation planning apparatus of the power plant by Embodiment 1 of this application. It is a conceptual diagram for demonstrating the mechanism of securing the supply and demand adjustment ability by Embodiment 2 of this application. It is a conceptual diagram for demonstrating the mechanism of securing the supply and demand adjustment ability by Embodiment 2 of this application. It is a functional block diagram which shows the operation planning apparatus of the power plant by Embodiment 2 of this application. It is a flowchart which shows the operation of the operation planning apparatus of the power plant by Embodiment 2 of this application.

Embodiment 1.
FIG. 1 is a conceptual diagram of a power plant targeted by the operation planning device for the power plant according to the first embodiment of the present application.

As shown in FIG. 1, the power plant 100 targeted in the present embodiment includes the boilers 10A and 10B, the turbines 11A and 11B connected to the boilers 10A and 10B, and the generators 12A and 12B connected to the turbines 11A and 11B. The power generation equipment represented by the above, and the energy storage equipment represented by the storage battery 13 and the heat storage tank 14 are included. The power plant 100 of the present embodiment shows an example in which the boilers 10A and 10B, the turbines 11A and 11B, and the generators 12A and 12B are provided, respectively, and the storage battery 13 and the heat storage tank 14 are provided. .. However, the number of each machine is not limited to the above number. Further, the boilers 10A and 10B, the turbines 11A and 11B, and the generators 12A and 12B are referred to as the boiler 10, the turbine 11, and the generator 12 in the following description, respectively.

In the power plant 100 shown in FIG. 1, the fuel F is burned in the boiler 10 to generate high-temperature and high-pressure steam from water by the heat generated in the boiler 10. The steam generated in the boiler 10 drives the turbine 11 to rotate the generator 12 to generate electric power. The thick solid line arrow C indicates the flow of steam, and the thick dotted arrow D indicates the flow of electric power. The flow of electric power from the generator 12 is connected to the electric power demand among the storage battery 13, the electric power trading 16, the electric power demand in the power plant and the annex factory, and the heat demand 17. The steam flow from the boiler 10 or the turbine 11 is connected to the heat demand of the power demand and the heat demand 17 in the heat storage tank 14, the power plant, and the annex factory.

Here, the power demand among the power demand and the heat demand 17 in the power plant and the annex factory (when there is an annex factory) is secured by the power generation of the generator 12, the discharge of the storage battery 13, and the power reception from the power system. doing. Further, the power demand and the heat demand of the heat demand 17 in the power plant and the annex factory (when there is an annex factory etc.) are secured by extracting air from the boiler 10 or the turbine 11 and radiating heat from the heat storage tank 14. ing.

2 and 3 are conceptual diagrams showing the mechanism of securing the supply and demand adjusting ability and formulating the operation plan of the power plant according to the first embodiment.

First, the outline of the mechanism for securing the supply and demand adjustment ability and the operation planning of the power plant according to the first embodiment will be described.
In this application, we consider the power to adjust supply and demand as the power to adjust up and down. The increase adjustment power is for responding to the shortage of the power supply capacity in the area, and the adjustment power price (unit price of the increase adjustment power) tends to be high in the daytime when the power demand in the area is high. On the other hand, the lowering adjustment power is for responding to the surplus of the power supply capacity of the area, and the adjusting power price (lowering adjustment power unit price) tends to be high at night when the power demand of the area is low. The area here means an area to which the power of the power plant 100 is supplied.

In the operation planning device of the power generation plant of the present embodiment, the power generation equipment (power generation) is generated by outputting electric power and heat from the energy storage equipment (storage battery 13 and heat storage tank 14) during the time when the unit price of the raising adjustment power is high. Consider increasing the power generation capacity of the machine 12) to secure the supply and demand adjustment capacity. In addition, during times when the unit price for lowering adjustment power is high, power and heat are stored in the energy storage equipment (storage battery 13 and heat storage tank 14), and the power generation capacity of the power generation equipment (generator 12) is reduced to secure supply and demand adjustment power. Think about what to do.

Next, the relationship between the raising adjustment force and the operation plan of the power plant will be described with reference to FIG. The first row on the left side of FIG. 2 shows the forecast of the increase adjustment power unit price (ΔkW unit price) as the adjustment power price. The portion surrounded by the dotted line U1 is the time zone in which the unit price of the raising adjustment force becomes high. The second row on the left side of FIG. 2 shows a graph of electric power (kW), the thick solid line represents the electric power demand curve, and the thick dotted line represents the electric power generated by the generators 12 (12A and 12B). The third stage on the left side of FIG. 2 shows a graph of the amount of steam (t / h) per unit time, the thick solid line shows the heat demand curve, and the thick dotted line shows the heat generation facility in the power plant (boiler 10, turbine 11). ) Represents the heat generation curve. The fourth row on the left side of FIG. 2 shows the remaining amount of the energy storage equipment (storage battery 13 and heat storage tank 14), that is, the remaining amount of the storage battery and the remaining amount of the heat storage tank. The figure on the right side of FIG. 2 shows the power generation capacity of the generator 12.

In the figure on the left side of FIG. 2, in the time zone U1 when the unit price of the raising adjustment force is high, the power generated by the generator 12 is suppressed and the discharge P1 is performed by the storage battery 13, and the heat generation facility (boiler 10, turbine 11) in the power plant is performed. ) Is suppressed and heat dissipation Q1 is performed by the heat storage tank 14.
As a result, as shown in the figure on the right side of FIG. 2, the surplus power generation capacity of the generator 12 is increased in the time zone U1 when the price of the increase adjustment capacity is high, and the supply and demand adjustment capacity can be secured.

Next, the relationship between the lowering adjustment force and the operation plan of the power plant will be described with reference to FIG. The first row on the left side of FIG. 3 shows the forecast of the lower adjustment power unit price (ΔkW) as the adjustment power price. The portion surrounded by the dotted line U2 is the time zone in which the unit price of the lowering adjustment force becomes high. The second row on the left side of FIG. 3 shows a graph of electric power (kW), the thick solid line represents the electric power demand curve, and the thick dotted line represents the electric power generated by the generators 12 (12A and 12B). The third row on the left side of FIG. 3 shows a graph of the amount of steam (t / h) per unit time, the thick solid line shows the heat demand curve, and the thick dotted line shows the heat generation facility in the power plant (boiler 10, turbine 11). ) Represents the heat generation curve. The fourth row on the left side of FIG. 3 shows the remaining amount of the energy storage equipment (storage battery 13 and heat storage tank 14), that is, the remaining amount of the storage battery and the remaining amount of the heat storage tank. The figure on the right side of FIG. 3 shows the power generation surplus capacity of the generator 12.

In the figure on the left side of FIG. 3, in the time zone U2 when the unit price of the lowering adjustment force is high, the storage battery 13 is charged P2 by the generated power of the generator 12, and the heat generation facility (boiler 10, turbine 11) in the power plant is charged. ), The heat storage Q2 of the heat storage tank 14 is performed.
As a result, as shown in the figure on the right side of FIG. 3, the surplus power generation capacity of the generator 12 is reduced in the time zone U2 when the lower adjustment power price is high, and the supply and demand adjustment power can be secured.

Next, the configuration of the operation planning device of the power plant according to the first embodiment of the present application will be described. FIG. 4 is a functional block diagram showing an operation planning device for a power plant according to the first embodiment.

As shown in FIG. 4, the operation planning device 200 of the power plant of the first embodiment has a demand plan acquisition unit 210, an energy storage equipment information acquisition unit 220, a power purchase and sale information acquisition unit 230, and an adjusting force. It includes an information acquisition unit 240 and an operation planning unit 250.

The demand plan acquisition unit 210 acquires the power demand plan and the heat demand plan for the target period for formulating the operation plan of the power plant. The demand plan acquisition unit 210 acquires the power demand plan of the consumers in the area from the outside. In addition, the demand plan acquisition unit 210 may change the in-house demand required on the power generation plant side each time depending on the operating state of the power generation plant. It is expressed as P_usej (t) = g (Pj (t))) and shall be considered at the time of planning calculation. Electricity demand and heat demand required at the annex factory are predicted using a prediction method such as multiple regression analysis from the production plan of the factory.

The energy storage equipment information acquisition unit 220 acquires the remaining energy at the beginning of the planned period in the energy storage equipment (storage battery 13 and heat storage tank 14), that is, the remaining energy of the storage battery and the remaining amount of the heat storage tank.

The power purchase and sale information acquisition unit 230 acquires the power purchase unit price and the power sale unit price from the electric power company during the planned period.

The adjustment power information acquisition unit 240 acquires the increase adjustment power unit price and the decrease adjustment power unit price that are considered when selling the increase adjustment power and the decrease adjustment power as the supply and demand adjustment power to the supply and demand adjustment market.

The operation planning unit 250 operates the power plant based on the information acquired by the demand plan acquisition unit 210, the energy storage equipment information acquisition unit 220, the power purchase and sale information acquisition unit 230, and the adjustment power information acquisition unit 240. Perform cost optimization calculations and formulate an operation plan for the power plant. The cost optimization calculation will be described later.

FIG. 5 is a block diagram showing a hardware configuration of the operation planning device of the power plant according to the first embodiment.
As shown in FIG. 5, the operation planning device 200 includes a control unit 310, a storage unit 320, and an external interface (external I / F) 330 as a hardware configuration. The control unit 310 includes a CPU (Central Processing Unit) 311 which is a processor, a RAM (Random Access Memory) 312, and a ROM (Read Only Memory) 313, and provides information on the acquisition units 210 to 240 and the operation planning unit 250 in FIG. Performs processing and arithmetic processing. Although not shown, the storage unit 320 is composed of a RAM, a ROM, a flash memory, a hard disk, etc., and stores a program 321 for performing information processing and arithmetic processing of each acquisition unit 210-240 and the operation planning unit 250. ing. The external interface 330 is an interface for connecting to the outside of the operation planning device 200, and each acquisition unit 210 to 240 in FIG. 4 acquires information from the outside and outputs the information processing result of the operation planning unit 250 to the outside. It is for output.

FIG. 6 is a flowchart showing the operation of the operation planning device of the power plant according to the first embodiment of the present application.

In step S101, the demand plan acquisition unit 210 acquires the power demand plan and the heat demand plan for the target period for formulating the operation plan of the power plant.
In step S102, the energy storage equipment information acquisition unit 220 acquires the remaining energy at the beginning of the planned period in the energy storage equipment.
In step S103, the power purchase and power sale information acquisition unit 230 acquires the power purchase unit price and the power sale unit price from the electric power company during the planning target period.
In step S104, the adjustment force information acquisition unit 240 acquires the increase adjustment force unit price of the increase adjustment force and the decrease adjustment force unit price of the decrease adjustment force as the supply and demand adjustment force.
In step S105, the operation planning unit 250 generates power based on the information acquired by the demand plan acquisition unit 210, the energy storage equipment information acquisition unit 220, the power purchase and sale information acquisition unit 230, and the adjustment power information acquisition unit 240. Optimize and calculate the cost of plant operation and formulate an operation plan for the power plant.

Assuming that the objective function formula and the constraint condition formula in the optimization calculation are, for example, the case where the fuel cost for power generation is minimized and the profit obtained from sales or the like is maximized, the following relational formulas can be considered.

That is, consider minimizing the objective function F (x) by using F (x) in the following equation (1) as the objective function.

Here, the constraint condition equations are the following equations (2) to (9).

However, in the equations (1) to (9),
F (x): A function that represents the total cost of operating a power plant,
T: Planning period,
F (i, t): Fuel consumption by fuel type,
Funi (i): Fuel unit price for each fuel type,
I: Number of fuel species,
P_buy (t): Electric charge amount,
P_buy _uni (t): Power purchase unit price,
P_sell (t): Electric charge,
P_sell _uni (t): Unit price for selling electricity,
Ucap_sel (t): Sales adjustment ability,
Ucap_sell _uni (t): Raising adjustment power unit price,
Dcap_sell (t): Sales reduction adjustment ability,
Dcap_sell _uni (t): Lowering adjustment power unit price,
Pj (t): Power generation amount of power generation equipment,
fj (t): Power generation amount model function of power generation equipment,
J: Number of power generation facilities,
P_usej (t): Electricity demand in the power plant,
Q (t): Steam amount (heat amount) of power generation equipment,
P_ch (t): Storage capacity of storage battery,
P_in (t): Charge amount to the storage battery,
P_out (t): Amount of discharge from the storage battery,
α: Charging efficiency of storage battery,
β: Battery discharge efficiency,
Q_ch (t): Heat storage amount in the heat storage tank,
Q_in (t): Amount of heat stored in the heat storage tank,
Q_out (t): Amount of heat dissipated from the heat storage tank,
γ: Heat storage efficiency of heat storage tank,
δ: Heat dissipation efficiency of heat storage tank,
P_dem (t): Electric power demand,
Q_dem (t): Heat demand,
Pa (t): Lower limit of operation of power generation equipment,
Pb (t): Upper limit of operation of power generation equipment,
Pmin (t): Lower limit of equipment operation of power generation equipment,
Pmax (t): Upper limit of equipment operation of power generation equipment,
Is.

Equation (1) is an objective function in the optimization calculation, the first term [A] is the fuel cost in the power generation facility, the second term [B] is the power purchase cost to purchase power from the electric power company, and the third term [C]. Is the revenue from selling electricity to the electric power company, and item 4 [D] is the revenue from selling the upward adjustment power and the downward adjustment power as the supply and demand adjustment power.

Equations (2) to (9) are constraint conditions in the optimization calculation, equation (3) is a model equation for the above-mentioned power generation amount, equations (2), equations (4), and equations (5) are power generation equipment and. Relational equations (6) and (7) created based on the equipment characteristics of energy storage equipment are balanced equations for electric power and thermal energy, and equations (8) and (9) are the amount of power generated and supply and demand of power generation equipment. It is an equation expressing the relationship of adjusting power.

This optimization problem is classified into a linear programming problem among the optimization problems, and can be solved by using, for example, the simplex method (simplex method). The solution using the simplex method is an example, and any method may be used for the solution.

As described above, the first embodiment is an operation planning device for a power plant having a power generation facility and an energy storage facility, and serves as a demand plan acquisition unit for acquiring a power demand plan and a heat demand plan, and a supply / demand adjusting force. To satisfy the power demand plan and the heat demand plan with the adjustment power information acquisition unit that acquires the adjustment power information regarding at least one of the up adjustment power and the down adjustment power, and to minimize the operating cost of the power plant. It is provided with an operation planning unit for formulating an operation plan for the power generation facility and the energy storage facility, and the operation planning unit formulates the operation plan so as to secure the supply and demand adjustment capability based on the adjustment force information. Therefore, it is possible to formulate an operation plan of the power plant so as to satisfy the power demand and the heat demand and to secure the supply and demand adjustment power based on the adjustment power information.

Further, the adjustment force information acquisition unit acquires the adjustment force information related to the increase adjustment force as the adjustment force information, and the operation planning unit uses the profit from selling the increase adjustment force as the operating cost of the power plant. Since the operation plan is formulated so as to minimize the operating cost of the power plant, it is possible to formulate an economical operation plan of the power plant with a view to selling the supply and demand adjustment ability. Become.

Further, the adjustment force information acquisition unit acquires the adjustment force information related to the lower adjustment force as the adjustment force information, and the operation planning unit uses the profit from selling the lower adjustment force as the operating cost of the power plant. Since the operation plan is formulated so as to minimize the operating cost of the power plant, it is possible to formulate an economical operation plan of the power plant with a view to selling the supply and demand adjustment ability. Become.

Further, the operation planning unit sets the operating cost of the power plant as the fuel cost of the power generation facility, the power purchase price due to the power purchase of the power plant, the power sale price due to the power sale of the power plant, and the increase adjustment power. Since the operation plan is formulated so as to minimize the operating cost of the power plant by including the profit from selling and the profit from selling the downward adjustment power, the supply and demand adjustment power can be sold. It is possible to formulate an economical operation plan for a power plant with a view to it.

In addition, it is a method of making an operation plan of a power plant having power generation equipment and energy storage equipment, and includes a demand plan acquisition process for acquiring a power demand plan and a heat demand plan, and an increase adjustment ability and a decrease adjustment ability as supply and demand adjustment ability. Based on the adjustment power information acquisition process for acquiring adjustment power information regarding at least one of them, satisfying the power demand plan and the heat demand plan, and minimizing the operating cost of the power plant. In order to secure the supply and demand adjustment ability, the power generation facility and the operation planning process for formulating the operation plan of the energy storage facility are provided, so that the power demand and the heat demand are satisfied and the adjustment ability information is used as the basis. It is possible to formulate an operation plan for a power plant so as to secure the ability to adjust supply and demand.

Embodiment 2.
In the first embodiment, an economical operation plan of the power plant was formulated by securing and selling the supply and demand adjustment ability by utilizing the energy storage equipment. In the second embodiment, when securing the supply and demand adjusting ability, the power demand response (hereinafter referred to as power DR) and the heat demand response (hereinafter referred to as heat DR) of the factory attached to the power plant are also considered. For example, it is possible to further secure the supply and demand adjusting power by activating the electric power DR and the thermal DR in the time zone when the unit price of the raising adjustment power becomes high and further suppressing the output of the generator. On the other hand, for example, by activating the electric power DR and the thermal DR in the time zone when the unit price of the lowering adjustment power becomes high and further increasing the output of the generator, it is possible to further secure the supply and demand adjusting power. Hereinafter, the details of the second embodiment will be described.

Since the power plant targeted by the operation planning device of the power plant according to the second embodiment is the same as that in FIG. 1, the description thereof will be omitted.

7 and 8 are conceptual diagrams showing a mechanism for formulating an operation plan for a power plant according to the second embodiment.

First, an outline of the mechanism for formulating an operation plan for a power plant according to the second embodiment will be described. Since the raising adjustment force and the lowering adjusting force as the supply and demand adjusting force are the same as those in the first embodiment, the description thereof will be omitted.

In the operation planning device of the power generation plant of the second embodiment, the power and heat are output from the energy storage equipment (storage battery 13 and heat storage tank 14) during the time when the raising adjustment power price is high, and the power generation capacity of the generator 12 is surplus. It is considered to secure the supply and demand adjustment ability by further increasing the power generation capacity of the generator 12 based on the power DR and thermal DR information. In addition, during the time when the lower adjustment power price is high, power and heat are stored in the energy storage equipment (storage battery 13 and heat storage tank 14) to reduce the power generation capacity of the generator 12, and based on the power DR and heat DR information. Therefore, it is considered to secure the supply and demand adjustment ability by further reducing the power generation capacity of the generator 12.

Next, the relationship between the raising adjustment force and the operation plan of the power plant will be described with reference to FIG. 7. The first row on the left side of FIG. 7 shows the forecast of the increase adjustment power unit price (ΔkW unit price) as the adjustment power price. The portion surrounded by the dotted line U1 is the time zone in which the unit price of the raising adjustment force becomes high. The second row on the left side of FIG. 7 shows a graph of electric power (kW), the thick solid line represents the electric power demand curve, and the thick dotted line represents the electric power generated by the generator 12. The third stage on the left side of FIG. 7 shows a graph of the amount of steam (t / h) per unit time, the thick solid line shows the heat demand curve, and the thick dotted line shows the heat generation facility in the power plant (boiler 10, turbine 11). ) Represents the heat generation curve. The fourth row on the left side of FIG. 7 shows the remaining amount of the energy storage equipment (storage battery 13 and heat storage tank 14), that is, the remaining amount of the storage battery and the remaining amount of the heat storage tank. The figure on the right side of FIG. 7 shows the power generation capacity of the generator 12.

In the figure on the left side of FIG. 7, in the time zone U1 when the unit price of the raising adjustment force is high, the power generated by the generator 12 is suppressed and the discharge P1 is performed by the storage battery 13, and the heat generation facility (boiler 10, turbine 11) in the power plant is performed. ) Is suppressed and heat dissipation Q1 is performed by the heat storage tank 14.
Furthermore, during the time period U1 when the unit price of the raising adjustment power is high, a request (demand) is made to the annex factory of the power plant 100 to suppress the demand for electric power and heat, and the annex factory that receives the request can suppress the amount of electric power and heat. Is notified (response), and the amount of power DR and the amount of heat DR that can be suppressed are set.
As a result, as shown in the figure on the right side of FIG. 7, the surplus power generation capacity of the generator 12 is increased from the first embodiment in the time zone U1 when the price of the increase adjustment capacity is high, and the supply and demand adjustment capacity can be secured. ..

Next, the relationship between the lowering adjustment force and the operation plan of the power plant will be described with reference to FIG. The first row on the left side of FIG. 8 shows the forecast of the lower adjustment power unit price (ΔkW) as the adjustment power price. The portion surrounded by the dotted line U2 is the time zone in which the unit price of the lowering adjustment force becomes high. The second row on the left side of FIG. 8 shows a graph of electric power (kW), the thick solid line represents the electric power demand curve, and the thick dotted line represents the electric power generated by the generator 12. The third row on the left side of FIG. 3 shows a graph of the amount of steam (t / h) per unit time, the thick solid line shows the heat demand curve, and the thick dotted line shows the heat generation facility in the power plant (boiler 10, turbine 11). ) Represents the heat generation curve. The fourth row on the left side of FIG. 8 shows the remaining amount of the energy storage equipment (storage battery 13 and heat storage tank 14), that is, the remaining amount of the storage battery and the remaining amount of the heat storage tank. The figure on the right side of FIG. 8 shows the remaining power generation capacity of the generator 12.

In the figure on the left side of FIG. 8, in the time zone U2 when the unit price of the lowering adjustment force is high, the storage battery 13 is charged P2 by the generated power of the generator 12, and the heat generation facility (boiler 10, turbine 11) in the power plant is used. The heat storage Q2 of the heat storage tank 14 is performed.
Furthermore, during the time period U2 when the unit price of the lowering adjustment power is high, a request (demand) is made to the annex factory of the power plant 100 to increase the demand for electric power and heat, and the annex factory that receives the request reduces the amount of electric power and heat that can be suppressed. Notification (response), increaseable power DR amount and heat DR amount.
As a result, as shown in the figure on the right side of FIG. 8, the surplus power generation capacity of the generator 12 is reduced as compared with the first embodiment in the time zone U2 when the lower adjustment power price is high, and the supply and demand adjustment power can be secured. it can.

Next, the configuration of the operation planning device of the power plant according to the second embodiment of the present application will be described. FIG. 9 is a functional block diagram showing an operation planning device for a power plant according to a second embodiment.

As shown in FIG. 9, the operation planning device 200 of the power plant of the second embodiment has a demand plan acquisition unit 210, an energy storage equipment information acquisition unit 220, a power purchase and sale information acquisition unit 230, and an adjusting force. It includes an information acquisition unit 240, a power DR and thermal DR information acquisition unit 260, and an operation planning unit 250.

The demand plan acquisition unit 210 acquires the power demand plan and the heat demand plan for the target period for formulating the operation plan of the power plant. The demand plan acquisition unit 210 acquires the power demand plan of the consumers in the area from the outside. In addition, since the demand plan acquisition unit 210 may change the in-house demand required on the power plant side each time in the operating state of the power plant, the model formula ((12) below) regarding the amount of generated power: It is expressed as P_usej (t) = g (Pj (t))) and shall be considered at the time of planning calculation. Electricity demand and heat demand required at the annex factory are predicted using a prediction method such as multiple regression analysis from the production plan of the factory.

Since the configuration and operation of the energy storage equipment information acquisition unit 220, the power purchase and sale information acquisition unit 230, and the adjustment force information acquisition unit 240 are the same as those in the first embodiment, the description thereof will be omitted.

The electric power DR and thermal DR information acquisition unit 260 makes a request (demand) to suppress the demand for electric power and heat to the factory attached to the power generation plant 100 in the time zone U1 when the unit price of the raising adjustment power is high, and receives the request. The annexed factory notifies the amount of power and heat that can be suppressed (response), and the power DR and heat DR information acquisition unit 260 outputs the amount of power DR and heat DR that can be suppressed to the operation planning unit 250.
In addition, the electric power DR and thermal DR information acquisition unit 260 makes a request (demand) to increase the demand for electric power and heat to the annexed factory of the power generation plant 100 in the time zone U2 when the unit price of the lowering adjustment force is high, and makes a request. The annex factory that received the notification informs (response) the amount of electric power and the amount of heat that can be suppressed, and the electric power DR and thermal DR information acquisition unit 260 outputs the amount of electric power DR and the amount of thermal DR that can be increased to the operation planning unit 250.

The operation planning unit 250 is the information acquired by the demand plan acquisition unit 210, the energy storage equipment information acquisition unit 220, the power purchase and sale information acquisition unit 230, the adjustment power information acquisition unit 240, and the power DR and thermal DR information acquisition unit 260. Based on the above, the optimization calculation of the operation cost of the power plant described below is performed, and the operation plan of the power plant is formulated.

Since the hardware configuration of the operation planning device of the power plant according to the second embodiment is the same as that of the first embodiment (FIG. 5), the description thereof will be omitted.

FIG. 10 is a flowchart showing the operation of the operation planning device of the power plant according to the second embodiment of the present application.

In step S201, the demand plan acquisition unit 210 acquires the power demand plan and the heat demand plan for the target period for formulating the operation plan of the power plant.
In step S202, the energy storage equipment information acquisition unit 220 acquires the remaining energy at the beginning of the planned period in the energy storage equipment.
In step S203, the power purchase and power sale information acquisition unit 230 acquires the power purchase unit price and the power sale unit price from the electric power company during the planning target period.
In step S204, the adjustment force information acquisition unit 240 acquires the increase adjustment force unit price and the decrease adjustment force unit price when selling the increase adjustment force and the decrease adjustment force as the supply and demand adjustment force to the supply and demand adjustment market.
In step S205, the electric power DR and thermal DR information acquisition unit 260 acquires the electric power DR and thermal DR possible amount of the factory attached to the power plant.
In step S206, the operation planning unit 250 includes a demand plan acquisition unit 210, an energy storage equipment information acquisition unit 220, a power purchase and sale information acquisition unit 230, a coordinating power information acquisition unit 240, and a power DR and thermal DR information acquisition unit. Based on the information acquired in 260, the cost of operating the power plant is optimized and calculated, and the operation plan of the power plant is formulated.

Assuming that the objective function formula and the constraint condition formula in the optimization calculation are, for example, the case where the fuel cost for power generation is minimized and the profit obtained from sales or the like is maximized, the following relational formulas can be considered.

That is, it is considered that F (x) of the following equation (10) is used as the objective function and the objective function F (x) is minimized.

Here, the constraint condition equations are the following equations (11) to (20).

However, in the equations (10) to (20),
F (x): A function that represents the total cost of operating a power plant,
T: Planning period,
F (i, t): Fuel consumption by fuel type,
Funi (i): Fuel unit price for each fuel type,
I: Number of fuel species,
P_buy (t): Electric charge amount,
P_buy _uni (t): Power purchase unit price,
P_sell (t): Electric charge,
P_sell _uni (t): Unit price for selling electricity,
Ucap_sel (t): Sales adjustment ability,
Ucap_sell _uni (t): Raising adjustment power unit price,
Dcap_sell (t): Sales reduction adjustment ability,
Dcap_sell _uni (t): Lowering adjustment power unit price,
Pj (t): Power generation amount of power generation equipment,
fj (t): Power generation amount model function of power generation equipment,
J: Number of power generation facilities,
P_usej (t): Electricity demand in the power plant,
Q (t): Steam amount (heat amount) of power generation equipment,
P_ch (t): Storage capacity of storage battery,
P_in (t): Charge amount to the storage battery,
P_out (t): Amount of discharge from the storage battery,
α: Charging efficiency of storage battery,
β: Battery discharge efficiency,
Q_ch (t): Heat storage amount in the heat storage tank,
Q_in (t): Amount of heat stored in the heat storage tank,
Q_out (t): Amount of heat dissipated from the heat storage tank,
γ: Heat storage efficiency of heat storage tank,
δ: Heat dissipation efficiency of heat storage tank,
P_dem (t): Electric power demand,
Q_dem (t): Heat demand,
Pa (t): Lower limit of operation of power generation equipment,
Pb (t): Upper limit of operation of power generation equipment,
Pmin (t): Lower limit of equipment operation of power generation equipment,
Pmax (t): Upper limit of equipment operation of power generation equipment,
P_DR (t): Power DR amount,
Q_DR (t): Thermal DR amount,
Is.

Equation (10) is an objective function in the optimization calculation, the first term [A] is the fuel cost in the power generation facility, the second term [B] is the power purchase cost to purchase power from the electric power company, and the third term [C]. Is the revenue from selling electricity to the electric power company, and item 4 [D] is the revenue from selling the upward adjustment power and the downward adjustment power as the supply and demand adjustment power.

Equations (11) to (20) are constraint conditions in the optimization calculation, equation (12) is a model equation relating to the above-mentioned power generation amount, equations (11), equations (13), and equations (14) are power generation equipment and. Relational equations (15) and (16) created based on the equipment characteristics of energy storage equipment are balanced equations for electric power and thermal energy, and equations (17) and (18) are the amount of power generation and supply and demand of power generation equipment. The equations, equations (19), and equations (20) expressing the relationship between the adjusting forces are constraint equations relating to the total value of the electric energy DR amount and the thermal DR amount during the planning period.

Of the electricity demand and heat demand, the electricity demand and heat demand required at the annex factory are determined based on the production volume of the factory, so the total value during the planning period shall not change. In other words, the total production volume of the annexed factory during the planning period shall not change.

This optimization problem is classified into a linear programming problem among the optimization problems, and can be solved by using, for example, the simplex method (simplex method). The solution using the simplex method is an example, and any method may be used for the solution.

As described above, in the second embodiment, in addition to the first embodiment, the demand response information acquisition unit for acquiring the electric power and heat demand response information of the factory attached to the power plant is provided, and the operation planning unit includes the electric power and the electric power and the heat demand response information. Since the operation plan was formulated so as to secure the supply and demand adjustment ability based on the heat demand response information and the adjustment power information, the power plant with a view to the supply and demand adjustment power and the power and heat demand response information. It is possible to formulate an economical operation plan.

In addition, it is a method of making an operation plan of a power plant having power generation equipment and energy storage equipment, and includes a demand plan acquisition process for acquiring a power demand plan and a heat demand plan, and an increase adjustment ability and a decrease adjustment ability as supply and demand adjustment ability. The adjustment power information acquisition process for acquiring the adjustment power information for at least one of them, the demand response acquisition process for acquiring the power and heat demand response information of the plant attached to the power plant, and the power demand plan and the heat demand plan. The power generation equipment and the energy storage equipment so as to satisfy and minimize the operating cost of the power plant and secure the supply and demand adjustment power based on the adjustment power information and the power and heat demand response information. Since it is equipped with an operation planning process for formulating an operation plan, it is possible to meet the power demand and heat demand, and to formulate an economical operation plan for the power plant with a view to supply and demand adjustment ability and power and heat demand response information. It becomes.

Further, the operation planning unit sets the operating cost of the power plant as the fuel cost of the power generation facility, the power purchase price due to the power purchase of the power plant, the power sale price due to the power sale of the power plant, and the increase adjustment power. Since the operation plan is formulated so as to minimize the operating cost of the power plant by including the profit from selling and the profit from selling the downward adjustment ability, the supply and demand adjustment ability is taken into consideration. It is possible to formulate an economical operation plan for the power plant that has been put in.

Although the present application describes various exemplary embodiments, the various features, embodiments, and functions described in one or more embodiments are not limited to the application of a particular embodiment. , Alone, or in various combinations.
Therefore, innumerable variations not illustrated are envisioned within the scope of the techniques disclosed in the present application. For example, it is assumed that at least one component is modified, added or omitted, and further, at least one component is extracted and combined with other components of the embodiment.

10A, 10B boiler, 11A, 11B turbine, 12A, 12B generator,
13 storage battery, 14 heat storage tank, 16 power trading,
Electricity and heat demand in 17 plants and factories, 100 power plants,
200 Operation planning equipment, 210 Demand planning acquisition department,
220 Energy storage equipment information acquisition department, 230 Power purchase and sale information acquisition department,
240 Coordination power information acquisition department, 250 Operation planning department,
260 power DR and thermal DR information acquisition unit, 310 control unit, 311 CPU,
312 RAM, 313 ROM, 320 storage, 321 program,
330 External interface.

Claims (7)

An operation planning device for a power plant that has power generation equipment and energy storage equipment.
Demand plan acquisition department that acquires power demand plan and heat demand plan,
The Coordination Power Information Acquisition Department, which acquires adjustment power information regarding at least one of the up adjustment power and the down adjustment power as the supply and demand adjustment power,
It is provided with an operation planning unit that satisfies the power demand plan and the heat demand plan and formulates an operation plan of the power generation facility and the energy storage facility so as to minimize the operating cost of the power plant.
The operation planning unit is an operation planning device for a power plant that formulates an operation plan so as to secure the supply and demand adjustment power based on the adjustment power information. The adjustment force information acquisition unit acquires the adjustment force information regarding the raising adjustment force as the adjustment force information, and obtains the adjustment force information.
The operation planning unit includes the profit from selling the raising adjustment power in the operating cost of the power plant, and the operation planning unit formulates the operating plan so as to minimize the operating cost of the power plant. Power plant operation planning equipment. The adjusting force information acquisition unit acquires the adjusting force information regarding the lowering adjusting force as the adjusting force information, and obtains the adjusting force information.
Claim 1 or claim that the operation planning unit includes the profit from selling the lowering adjustment force in the operation cost of the power plant and formulates the operation plan so as to minimize the operation cost of the power plant. Item 2. The operation planning device for the power plant according to Item 2. It is equipped with a demand response information acquisition unit that acquires power and heat demand response information from the factory attached to the power plant.
According to any one of claims 1 to 3, the operation planning unit formulates the operation plan so as to secure the supply and demand adjustment power based on the power and heat demand response information and the adjustment power information. The operation planning device of the power plant described. The operation planning unit sells the fuel cost of the power generation facility, the power purchase price of the power plant, the power sale price of the power plant, and the increase adjustment power as the operation cost of the power plant. In any one of claims 1 to 4, the operation plan is formulated so as to minimize the operating cost of the power plant by including the profit from the result and the profit from selling the downward adjustment power. The operation planning device of the power plant described. It is a method of planning the operation of a power plant that has power generation equipment and energy storage equipment.
Demand plan acquisition process to acquire power demand plan and heat demand plan,
The adjustment power information acquisition process for acquiring adjustment power information regarding at least one of the up adjustment power and the down adjustment power as the supply and demand adjustment power, and
The power generation equipment and the energy storage so as to satisfy the power demand plan and the heat demand plan, minimize the operating cost of the power plant, and secure the supply and demand adjustment power based on the adjustment power information. A method for formulating an operation plan for a power plant, which includes an operation planning process for formulating an operation plan for equipment. It is a method of planning the operation of a power plant that has power generation equipment and energy storage equipment.
Demand plan acquisition process to acquire power demand plan and heat demand plan,
The adjustment power information acquisition process for acquiring adjustment power information regarding at least one of the up adjustment power and the down adjustment power as the supply and demand adjustment power, and
The demand response acquisition process for acquiring the power and heat demand response information of the factory attached to the power plant, and
Satisfy the power demand plan and the heat demand plan, minimize the operating cost of the power plant, and secure the supply and demand adjustment power based on the power and heat demand response information. , A method for formulating an operation plan of a power plant including an operation planning process for formulating an operation plan for the power generation facility and the energy storage facility.

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