JP7048797B1 - Management equipment, management methods, and management programs - Google Patents

Abstract

PROBLEM TO BE SOLVED: To level the load of the entire power system. A management device 10 includes a plan creation unit 15A. The planning unit 15A is a storage battery that maximizes the predicted value of the power selling revenue based on the power generation predicted value and the power selling unit price of the PV26 for each power generation system 20 having the PV26 and the storage battery 25 charged only from the PV26. Create a charge / discharge plan for 25 and a power generation plan for the power generation system 20. [Selection diagram] Fig. 2

Description

Embodiments of the present invention relate to management devices, management methods, and management programs.

In recent years, technological development of a virtual power plant (VPP) in which distributed energy resources (DER: Distributed Energy Resources) are remotely and integratedly controlled and a plurality of power generation companies are used as a power generation balancing group is being promoted.

In addition, there are cases where a renewable energy generator such as a solar power generation device or a wind power generation, or a power generation system equipped with a renewable energy generator and a storage battery is used as a DER. For example, a system is disclosed that predicts the amount of electric power output by a power generation system equipped with a storage battery and a photovoltaic power generation device, and notifies a manager such as an electric power company that manages the entire power system in advance.

Japanese Unexamined Patent Publication No. 2020-54050

However, in the prior art, the charge / discharge plan of the storage battery and the power generation plan of the power generation system, which enhance the profit of selling the power of the power generation system, are not taken into consideration, and there is room for improvement in terms of load leveling of the entire power system.

An object of the present invention is to provide a management device, a management method, and a management program capable of achieving load leveling of the entire power system.

The management device of the embodiment has a renewable energy power source and a storage battery charged only from the renewable energy power source , and the discharge from the storage battery is reverse-flowed to the power system to sell the power generation system. It is provided with a planning unit for creating a charge / discharge plan of the storage battery and a power generation plan of the power generation system for maximizing the predicted value of the power sale revenue based on the power generation predicted value of the renewable energy power source and the power sales unit price.

It is a figure which shows an example of the outline of an electric power demand system. It is a figure which shows an example of the functional configuration of a management device and a power generation system. It is explanatory drawing of an example of charge / discharge plan and power generation plan which maximizes an objective function. It is explanatory drawing of an example of charge / discharge control of a storage battery. It is a schematic diagram of an example of a power generation pattern. It is a figure which shows an example of the probability distribution of the occurrence probability of a power generation pattern. It is a figure which shows an example of the generation probability of a power generation pattern and the PV power generation predicted value. It is a figure which shows an example of the pattern of the storage battery SoC operation margin. It is a figure which shows an example of the transition of a storage battery SoC. It is a figure which shows an example of the transition of a storage battery SoC. It is a figure which shows an example of the transition of a storage battery SoC. It is explanatory drawing of an example of the charge / discharge plan and the power generation plan of the upper limit and the lower limit of the operation charge rate which maximizes an objective function. It is a flowchart which shows an example of the flow of charge / discharge plan and power generation plan creation processing which maximizes an objective function. It is a flowchart which shows an example of the flow of charge / discharge plan and power generation plan creation processing which maximizes an objective function. It is a flowchart which shows an example of the flow of the charge / discharge plan of the operation margin which maximizes an objective function, and the power generation plan creation process.

Hereinafter, embodiments of a management device, a management method, and a management program according to the present invention will be described with reference to the drawings. In the following, there are two types of time, one is to indicate the moment of time and the other is to indicate the time width of the unit time. The unit time is, for example, 30 minutes.

FIG. 1 is a diagram showing an example of an outline of the power system S according to the present embodiment.

The electric power system S includes an aggregator 1, a consumer 4, a wholesale electricity market 5, a wide area engine 6, and a plurality of power plants 8.

The OCCTO 6 is an OCCTO, which monitors the power supply and demand status of the whole country and the operation status of the power system 2 24 hours a day to secure a stable supply of power, and manages the power supply and demand of the grid operator. do. All grid users (power generation companies, retail electricity companies, etc.) who use the power system 2 are supposed to submit a power generation and demand plan (annual, monthly, weekly, the day before) to the OCCTO 6. , The wide area organization 6 confirms these consistency and transfers it to the grid operator.

The aggregator 1 is a business operator that manages a plurality of power plants 8 in a bundle. That is, the plurality of power plants 8 function as power generation BG (balancing group) 3.

The aggregator 1 predicts the amount of power generated by each of the plurality of power plants 8, sells power in the wholesale power market 5, and directly trades power with the consumer 4. Further, the aggregator 1 contributes to the load leveling of the power system 2 by controlling the amount of power generated by each of the power plants 8 based on the power generation schedule of the power plant 8.

The aggregator 1 includes a management device 10. The management device 10 prepares a power generation plan for the power plant 8 and reports it to the OCCTO 6 in advance by a predetermined date. For example, the management device 10 reports the power generation plan of the next day to the OCCTO 6 on the previous day, and also reports the power generation plan modified as necessary to the OCCTO 6 on the day.

The power plant 8 is, for example, a power generation system 20, a power plant 21, a storage battery 22, and the like.

The power generation system 20 includes a storage battery 25 and a PV (Photovoltaics) 26. PV26 is a photovoltaic power generation device and is an example of a renewable energy power source. The power generation system 20 may be configured to include a renewable energy power source. Therefore, the power generation system 20 may be configured to include a power generation device that utilizes the environment and resources existing in the natural world such as geothermal heat, wind, and water, instead of the PV26. In the present embodiment, a configuration in which the power generation system 20 includes PV26, which is a photovoltaic power generation device, will be described as an example.

The storage battery 25 of the power generation system 20 is charged only from the PV 26. That is, in the power generation system 20, the amount of power generated by the power generation system 20 is controlled by controlling the charging and discharging of the storage battery 25.

In the present embodiment, a mode in which the management device 10 creates a charge / discharge plan for each storage battery 25 of one or a plurality of power generation systems 20 included in the power generation BG3 and a power generation plan for the power generation system 20 will be described as an example.

The management device 10 is a PC (Personal Computer) or the like, and includes a CPU (Central Processing Unit), a memory, an HDD (Hard Disk Drive), a communication interface (I / F), a display device such as a display, and a keyboard. It has a hardware configuration using a normal computer equipped with an input device such as a mouse and a mouse.

FIG. 2 is a diagram showing an example of a functional configuration of the management device 10 and the power generation system 20 according to the present embodiment.

First, the power generation system 20 will be described. The power generation system 20 includes a power meter 23 and a power generation unit 24.

The electricity meter 23 measures the amount of electric power output from the power generation unit 24. That is, the watt-hour meter 23 measures the power generation system output, which is the power generation amount of the power generation system 20. The power generation system output is the amount of electric power supplied from the power generation system 20 to the power system 2. The electricity meter 23 measures the power generation system output every unit time.

The unit time is a management time managed by the electric power system S. In this embodiment, an embodiment in which the unit time is 30 minutes will be described as an example.

The power generation unit 24 includes a storage battery 25, a PV 26, and a control unit 27. As described above, in the present embodiment, the storage battery 25 is charged only from the PV 26. The control unit 27 controls the charge / discharge of the storage battery 25 based on the charge / discharge plan and the power generation plan received from the management device 10. The details of this control will be described later. Further, the control unit 27 outputs the PV power generation amount of the PV 26, the charge / discharge power amount of the storage battery 25, and the storage battery SoC (State Of Charge), which is the charge rate of the storage battery, to the management device 10 every unit time. It should be noted that these information may be output from each of the watt-hour meter 23, the storage battery 25, and the PV 26 to the management device 10.

The management device 10 will be described. The management device 10 includes a communication unit 11, an input unit 12, a display unit 13, a storage unit 14, and a control unit 15. The communication unit 11, the input unit 12, the display unit 13, the storage unit 14, and the control unit 15 are communicably connected by a bus or the like.

The communication unit 11 communicates with the wholesale electricity market 5, the wide area engine 6, the prediction system 7, and the power generation system 20. The input unit 12 is an input device such as a keyboard that accepts operation input by the user. The display unit 13 is a display that displays various types of information. The storage unit 14 stores various types of information. The storage unit 14 is, for example, an HDD, a memory, or the like.

The control unit 15 is a calculation unit that executes information processing. The control unit 15 includes a plan creation unit 15A, a power generation system control unit 15B, a power generation pattern creation unit 15C, an imbalance calculation unit 15D, and a display control unit 15E.

At least one of the planning unit 15A, the power generation system control unit 15B, the power generation pattern creation unit 15C, the imbalance calculation unit 15D, and the display control unit 15E is realized by, for example, one or a plurality of processors. For example, each of the above parts may be realized by causing a processor such as a CPU to execute a program, that is, by software. Each of the above parts may be realized by a processor such as a dedicated IC (Integrated Circuit), that is, hardware. Each of the above parts may be realized by using software and hardware in combination. When a plurality of processors are used, each processor may realize one of each part, or may realize two or more of each part.

The planning unit 15A creates a charge / discharge plan and a power generation plan that maximize the predicted value of the power selling revenue based on the power generation predicted value and the power selling unit price of PV26.

First, the planning unit 15A derives the power generation predicted value and the power selling unit price of PV26.

The power generation predicted value of PV26 is a predicted value of the power generation amount of PV26 for each unit time. In the following, the predicted power generation value of PV26 may be referred to as a predicted PV power generation value. The planning unit 15A derives a PV power generation predicted value for each unit time based on the measured value of the PV power generation amount of PV26 acquired from the power generation system 20 and the weather information such as the amount of sunshine. The plan creation unit 15A may derive the PV power generation predicted value by acquiring the PV power generation predicted value from the prediction system 7, the input unit 12, the storage unit 14, or the like.

The electric power selling unit price is the electric power selling unit price for each unit time of the electric power output from the power generation system 20. The unit price of electric power may be either a predicted transaction price in the wholesale electricity market 5 or a transaction price predetermined by a contract. In this embodiment, an embodiment in which the unit price of electric power sales is a predicted transaction price for each unit time will be described as an example. The planning unit 15A may derive the power selling unit price by acquiring the power selling unit price from the wholesale power market 5, the forecasting system 7, or the like, for example.

The planning unit 15A creates a charge / discharge plan and a power generation plan that maximize the predicted value of the power selling revenue of the power generation system 20 based on the PV power generation predicted value and the power selling unit price. In the present embodiment, the plan creation unit 15A will explain, as an example, a mode of creating a charge / discharge plan and a power generation plan for 24 hours on the next day.

Specifically, the planning unit 15A calculates the optimum solution of the optimization problem that maximizes the objective function F of the equation (1) under the constraint conditions shown in the equations (2) to (6). By calculating the optimum solution that maximizes the objective function F, the plan creation unit 15A calculates the charge / discharge plan and the power generation plan for each unit time for each power generation system 20.

The optimization problem of equations (1) to (6) is a problem called a linear programming problem. The planning unit 15A calculates an optimum solution that maximizes the objective function F of the equation (1) by, for example, a simplex method or an interior point method.

The variables of the above equation (1) are as follows.

C _t : Charge amount (kWh) to the storage battery 25 at time t
D _t : Discharge amount (kWh) from the storage battery 25 at time t

The parameters of the above equations (1) to (6) are as follows.
UP _t : Predicted value of the unit price of electricity sold at time t (yen / kWh)
PV _t : PV power generation predicted value (kWh) at time t
C _min : Minimum amount of power that can be charged in 30 minutes (kWh)
C _max : Maximum amount of power that can be charged in 30 minutes (kWh)
D _min : Minimum amount of power that can be discharged in 30 minutes (kWh)
D _max : Maximum amount of power that can be discharged in 30 minutes (kWh)
SoC _min : Lower limit of operation of storage battery SoC SoC _max : Upper limit of operation of storage battery SoC η _c : Charging efficiency of storage battery 25 η _D : Discharge efficiency of storage battery 25

In the formula (1), D _t and C _t correspond to the charge / discharge plans of the storage battery 25 at each time t. In equation (1), {PV _t- (D _t -C _t )} corresponds to the power generation plan for each time t of the power generation system 20.

The objective function F represented by the equation (1) shows a predicted value of the power sale revenue at the time T to be planned. In the present embodiment, the time T to be planned is 24 hours on the day following the day when this process is executed. t indicates a time at intervals of 30 minutes, which is a unit time.

The planning unit 15A has a minimum electric energy C _min that can be charged in 30 minutes (unit time), a maximum electric energy C _max that can be charged in 30 minutes, and 30 minutes, which are the parameters of the equations (1) to (6). Minimum electric energy D _min that can be discharged in 30 minutes, maximum electric energy D _max that can be discharged in 30 minutes, operation lower limit SoC _min of storage battery SoC, operation upper limit SoC _max of storage battery SoC, charge efficiency η _c of storage battery, and discharge efficiency of storage battery Obtained by reading η _D from the storage unit 14. The planning unit 15A may acquire at least one of these parameters from the power generation system 20 or the like.

Further, as described above, the planning unit 15A derives PV _t which is a PV power generation predicted value and UP _t which is a power selling unit price.

Then, the planning unit 15A obtains the values of D _t and C _t that maximize the objective function F, which is the predicted value of the power sale revenue, after satisfying the constraints of the equations (2) to (6). .. In other words, the planning unit 15A inputs the acquired and derived parameters to the equations (1) to (6), and obtains the optimum solution which is the value of D _t and C _t at which the objective function F is maximized. By the process of obtaining the optimum solution, the plan creation unit 15A creates a charge / discharge plan in which the charge amount Ct to the storage battery 25 and the discharge amount _Dt from the storage battery 25 are defined at each time _t .

Further, the planning unit 15A is represented by {PV _t − (D _t − C _t )} in the equation (1) by obtaining the values of D _t and C _t that maximize the objective function F. Create a power generation plan that defines the amount of power generated by the power generation system 20 at each time t.

FIG. 3 is an explanatory diagram of an example of a charge / discharge plan and a power generation plan in which the objective function F is maximized. FIG. 3 shows the electric power selling unit price (yen / kWh) with respect to the time t, the electric energy amount (kWh) with respect to the time t, and the storage battery storage amount (kWh) with respect to the time t.

The diagram 30 shows the predicted value UP _t of the power sale unit price at the time t. The diagram 32 shows the PV power generation predicted value PV _t at time t. The diagram 34 shows the power generation plan {PV _t- (D _t -C _t )} for each time t of the power generation system 20. FIG. 36 shows a planned value of the stored amount of the storage battery 25.

As shown in the diagram 30, the predicted value UP _t of the power sale unit price at the time t fluctuates according to the time t. Further, as shown in FIG. 32, the PV power generation predicted value PV _t at the time t of the PV 26 has, for example, a large amount of power generation during the daytime.

The planning unit 15A obtains the charge amount Ct to the storage battery 25 at time _t and the discharge amount Dt from the storage battery 25 at time _t that maximize the objective function F, which is the predicted value of the power sale revenue. By this process, the plan creation unit 15A creates a charge / discharge plan for discharging in the time zone when the unit price of electric power is high and charging in the time zone when the unit price of electric power is low.

Specifically, for example, the storage battery 25 is charged from 6 o'clock by the start of power generation of PV26, discharged from 8 o'clock to 8:30 when the unit price of electric power is high, and 11 o'clock when the unit price of electric power is low. A charge / discharge plan is created in which the electricity is charged from 12:00 to 12:00 and then discharged from 17:00 to 18:00 when the unit price of electricity is high.

Therefore, the power generation system output, which is the power generation plan for each time t of the power generation system 20 represented by {PV _t − (D _t − C _t )}, is represented by the diagram 34.

Further, as shown in FIG. 36, a charge / discharge plan is created that satisfies the restrictions of the operation upper limit SoC _max of the storage battery SoC, which is the upper limit of the charge amount of the storage battery 25, and the operation upper limit SoC _min of the SoC, which is the lower limit of the charge amount of the storage battery 25. To.

Therefore, the plan creation unit 15A can create a charge / discharge plan for the storage battery 25 and a power generation plan for the power generation system 20 that maximizes the predicted value of the power sales revenue of the power generation system 20.

Returning to FIG. 2, the explanation will be continued. The planning unit 15A submits the created power generation plan to the wide area organization 6. Further, the plan creation unit 15A outputs the created charge / discharge plan and power generation plan to the power generation system control unit 15B and the display control unit 15E.

The display control unit 15E displays the charge / discharge plan and the power generation plan received from the plan creation unit 15A on the display unit 13. Therefore, the user can confirm the charge / discharge plan and the power generation plan by visually recognizing the display unit 13.

The power generation system control unit 15B controls the power generation system 20 according to the charge / discharge plan and the power generation plan received from the plan creation unit 15A.

For example, the power generation system control unit 15B outputs the charge / discharge plan and the power generation plan received from the plan creation unit 15A to the power generation system 20 via the communication unit 11.

The control unit 27 of the power generation system 20 that has received the charge / discharge plan and the power generation plan from the management device 10 controls the storage battery 25 based on the received charge / discharge plan and the power generation plan. Specifically, the control unit 27 controls the charging and discharging of the storage battery 25 according to the charging / discharging plan of the storage battery 25 at each time t. Specifically, the control unit 27 outputs an instruction signal indicating the charge amount Ct to the storage battery 25 at time _t or the discharge amount _Dt from the storage battery 25 at time t for each unit time shown in the charge / discharge plan. Output to 25. When the storage battery 25 receives the instruction signal indicating the charge amount Ct at the time _t , the storage battery 25 charges the electric power of the charge amount Ct indicated by the instruction signal among the electric power generated by the PV 26 at the time _t . Further, when the storage battery 25 receives the instruction signal indicating the discharge amount D t at the time t, the storage battery 25 discharges the electric power of the discharge amount D _t indicated by the instruction signal at the time _t to the power system 2. Further, the control unit 27 may control the charging / discharging of the storage battery 25 according to the power generation plan so that the power generation system output according to the power generation plan can be obtained.

The power generation system control unit 15B may control the storage battery 25 of the power generation system 20 based on the charge / discharge plan and the power generation plan created by the plan creation unit 15A. That is, the power generation system control unit 15B may be provided with the control function of the storage battery 25 by the control unit 27. In this case, the power generation system control unit 15B may control the charging and discharging of the storage battery 25 according to the charging / discharging plan of the storage battery 25 at each time t. Specifically, the power generation system control unit 15B outputs an instruction signal indicating the charge amount Ct to the storage battery 25 at time t or the discharge amount Dt from the storage battery 25 at time t for each unit time shown in the charge / discharge plan. It suffices to output to the storage battery 25 of the power generation system 20.

In the present embodiment, a mode in which the power generation system control unit 15B controls the storage battery 25 of the power generation system 20 based on the charge / discharge plan and the power generation plan created by the plan creation unit 15A will be described as an example.

The power generation system control unit 15B may control the charge / discharge of the storage battery 25 according to the charge / discharge plan of the storage battery 25 at each time t shown in the charge / discharge plan, but the power generation system output according to the power generation plan is realized. The charge / discharge of the storage battery 25 may be controlled so as to be performed.

Specifically, the PV power generation predicted value PV _t at the time t used at the time of creating the charge / discharge plan and the power generation plan is a predicted value, and the PV 26 does not always generate power as predicted on the day when the power generation plan is executed. Therefore, an imbalance, which is a difference between the power generation plan of the power generation system 20 and the power generation record of the power generation system 20, may occur.

Therefore, the power generation system control unit 15B ensures that the actual power generation output of the power generation system 20 is as per the power generation plan {PV _t- (D _t -C _t )} for each time t of the power generation system 20. In addition, the charging / discharging of the storage battery 25 may be controlled. That is, the power generation system control unit 15B may control the charging and discharging of the storage battery 25 so as to suppress the imbalance.

This will be described with reference to FIG. FIG. 4 is an explanatory diagram of an example of charge / discharge control of the storage battery 25. FIG. 4 shows the electric energy (kWh) with respect to the time t and the storage battery storage amount (kWh) with respect to the time t.

The diagram 32 shows the PV power generation predicted value PV _t at time t. FIG. 34 shows a power generation plan of the power generation system 20. The diagram 33 shows the actual power generation value of PV26. FIG. 35 shows the power generation system output of the day when the charging and discharging of the storage battery 25 are controlled according to the charging / discharging plan of the storage battery 25 at each time t. In other words, FIG. 35 shows the power generation performance of the power generation system 20. Further, in FIG. 4, D _t and C _t represent charge / discharge control according to the charge / discharge plan of the storage battery 25 at each time t.

The diagram 38 and the region 38A show the imbalance which is the difference between the power generation plan of the power generation system 20 represented by the diagram 34 and the power generation record of the power generation system 20 represented by the diagram 35. The actual power generation of the power generation system 20 represented by the diagram 35 is obtained by adding or subtracting the actual charge / discharge values ( _Dt and _Ct in FIG. 4) of the storage battery 25 from the actual power generation actual value of the PV 26 (FIG. 33). Expressed as a value. FIG. 36 shows a planned value of the stored amount of the storage battery 25.

The actual power generation value of PV26 on the day of execution of the charge / discharge plan and the power generation plan shown in FIG. 33 may be different from the PV power generation predicted value PV _t shown in FIG. 32. In this case, if the charging and discharging of the storage battery 25 are controlled according to the charging / discharging plan of the storage battery 25 at each time t, the output of the power generation system 20 on that day will be shown in FIG. 35, for example. Therefore, on the day when the charge / discharge plan and the power generation plan are executed, an imbalance (see diagram 38 and area 38A), which is the difference between the power generation plan of the power generation system 20 and the actual power generation of the power generation system 20, occurs. In some cases.

Therefore, even if the power generation system control unit 15B controls the charging and discharging of the storage battery 25 so that the power generation system output according to the power generation plan of the power generation system 20 is realized when the occurrence of imbalance is predicted. good. For example, within a unit time (for example, 30 minutes), the power generation system control unit 15B discharges the storage battery 25 if the actual PV power generation value of the PV26 is small, and charges the storage battery 25 if the PV power generation value is large. Control is performed to bring the output of 20 closer to the power generation plan. In the following, charging and discharging of the storage battery 25 may be referred to as charging / discharging of the storage battery 25, and charging / discharging control may be referred to as charging / discharging control. By performing such control, the management device 10 can maximize the predicted value of the power sale revenue and suppress the imbalance.

The capacity of the storage battery 25 is limited. Therefore, even if the charge / discharge control of the storage battery 25 is controlled so that the power generation system output according to the power generation plan created by the plan creation unit 15A is realized, the charge / discharge control exceeding the capacity of the storage battery 25 cannot be performed. It may be difficult to control the imbalance.

Therefore, it is preferable that the plan creation unit 15A creates a charge / discharge plan and a power generation plan in which a margin, which is a reserve capacity, is set in at least one of the upper limit and the lower limit of the operating charge rate of the storage battery 25.

The upper limit of the operating charge rate of the storage battery 25 corresponds to the above-mentioned operating upper limit SoC _max of the storage battery SoC. The lower limit of the operating charge rate of the storage battery 25 corresponds to the above-mentioned lower limit of operating SoC _min of the storage battery SoC.

For example, the plan creation unit 15A sets a margin for the operation upper limit SoC _max of the storage battery SoC and the operation lower limit SoC _min of the storage battery SoC, which are the constraint conditions of the objective function F shown in the equation (4), for the charge / discharge plan and the power generation plan. Just create it. The value of the margin may be determined by, for example, an offline simulation. For example, the planning unit 15A may determine the margin value by simulation or the like so as to maximize the predicted value of the power sale revenue and avoid imbalance.

For example, it is assumed that the operation lower limit SoC _min of the storage battery SoC is 0% and the operation upper limit SoC _max of the storage battery SoC is 100% in the state where the margin is not set. In this case, the planning unit 15A sets, for example, a margin of 30% in the operation lower limit of the storage battery SoC and a margin of 20% in the operation of the storage battery SoC. Specifically, for example, the planning unit 15A sets the operation lower limit SoC _min of the storage battery SoC to 30% and the operation upper limit SoC _max of the storage battery SoC to 80%. Then, the plan creation unit 15A may create a charge / discharge plan and a power generation plan that maximize the objective function F under this constraint condition.

The planning unit 15A creates a charge / discharge plan and a power generation plan in which a margin, which is a reserve capacity, is set in at least one of the upper limit and the lower limit of the operating charge rate of the storage battery 25, so that the power generation system control unit 15B creates the storage battery 25 on the day. At the time of control, it is possible to perform control in which imbalance is suppressed.

Returning to FIG. 2, the explanation will be continued. The power generation plan submitted to OCCTO 6 can be amended even on the day when the power generation plan is executed. For example, it is possible to revise and submit the power generation plan before the gate close (GC), which is the deadline for submitting the plan on the day.

Therefore, the plan creation unit 15A may appropriately recreate the power generation plan and submit it to the OCCTO 6 according to the change in the PV power generation predicted value PV _t at the time t, which is the PV power generation predicted value. Further, at this time, the plan creation unit 15A may recalculate the power generation plan of the entire power generation BG3 according to the latest power generation plan of each of the plurality of power plants 8 belonging to the power generation BG3 and submit it to the wide area organization 6. .. At this time, the plan creation unit 15A may also recreate the charge / discharge plan. Further, when the plan creation unit 15A modifies or recreates the charge / discharge plan and the power generation plan, the power generation system control unit 15B controls the storage battery 25 of the power generation system 20 based on the latest charge / discharge plan and the power generation plan. Just do it.

As described above, imbalance may occur on the day when the charge / discharge plan and the power generation plan are executed.

Therefore, the plan creation unit 15A may create a charge / discharge plan and a power generation plan that maximize the subtraction value obtained by subtracting the imbalance loss from the power sale revenue.

In this case, the plan creation unit 15A may create a charge / discharge plan and a power generation plan using the information received from each of the power generation pattern creation unit 15C and the imbalance calculation unit 15D.

The power generation pattern creation unit 15C creates a power generation pattern of the predicted power generation value of PV26.

The power generation pattern is a pattern that represents the time transition of the PV power generation predicted value of PV26 on the day when the power generation plan is executed. In other words, the power generation pattern is the PV power generation predicted value PVt for each time t on the day when the power generation plan is executed. The power generation pattern creation unit 15C creates a plurality of power generation patterns having different PV power generation predicted values PVt at time t.

FIG. 5 is a schematic diagram of an example of the power generation pattern 40. In FIG. 5, the horizontal axis indicates time t, and the vertical axis indicates PV output, which is the amount of electric power output from PV26.

The power generation pattern creation unit 15C creates, for example, a power generation pattern 40A which is a PV power generation predicted value PV _t at time t as a reference expected value. The power generation pattern creation unit 15C is based on, for example, the actual measurement value of the PV power generation amount and the weather information such as the amount of sunshine, in the same manner as when deriving the PV power generation predicted value PV _t at the time t used in the above-mentioned objective function F. Therefore, a power generation pattern 40A, which is a PV power generation predicted value PV _t at the time t of the expected value as a reference, is created. The power generation pattern creation unit 15C may create the power generation pattern 40A by acquiring the PV power generation prediction value from the prediction system 7, the input unit 12, the storage unit 14, or the like.

Then, the power generation pattern creation unit 15C creates a plurality of power generation patterns 40 that may occur as unexpected. For example, the power generation pattern creation unit 15C creates a plurality of power generation patterns 40 having different PV outputs in the increasing direction and the decreasing direction from the power generation pattern 40A created as the expected value. FIG. 5 shows, as an example, the power generation pattern 40 of the power generation pattern 40B to the power generation pattern 40G. The power generation pattern 40B is an example of a power generation pattern 40 having a different PV output in the + 1σ direction from the power generation pattern 40A. The power generation pattern 40C is an example of a power generation pattern 40 having a different PV output in the + 2σ direction from the power generation pattern 40A. The power generation pattern 40D is an example of a power generation pattern 40 having a different PV output in the + 3σ direction from the power generation pattern 40A. The power generation pattern 40E is an example of a power generation pattern 40 having a different PV output in the -1σ direction from the power generation pattern 40A. The power generation pattern 40F is an example of a power generation pattern 40 having a different PV output in the −2σ direction from the power generation pattern 40A. The power generation pattern 40G is an example of a power generation pattern 40 having a different PV output in the -3σ direction from the power generation pattern 40A.

In the present embodiment, the power generation pattern creating unit 15C will explain an embodiment in which seven power generation patterns 40 are created as an example. The number of power generation patterns 40 created by the power generation pattern creation unit 15C may be two or more, and is not limited to seven.

The power generation pattern creation unit _15C calculates the probability of occurrence Pi that each of the created power generation patterns 40 actually occurs on the day when the power generation plan is executed.

FIG. 6 is a diagram showing an example of the probability distribution of the occurrence probability _Pi in which each of the plurality of power generation patterns 40 created by the power generation pattern creation unit 15C occurs on the actual day. In this embodiment, a mode in which this probability distribution shows a normal distribution will be described as an example.

FIG. 7 shows the probability of occurrence of each of the plurality of power generation patterns 40 created by the power generation pattern creation unit 15C on the day when the power generation plan is executed, and the PV power generation predicted value PV for each time t of the plurality of power generation patterns 40. It is a figure which shows an example of _t .

Returning to FIG. 2, the explanation will be continued. The imbalance calculation unit 15D calculates an imbalance predicted value, which is the difference between the power generation plan and the output of the power generation system 20 according to the power generation pattern 40.

The imbalance calculation unit 15D calculates the predicted value of the imbalance generated at each time t for each of the plurality of power generation patterns 40 created by the power generation pattern creation unit 15C. For example, the imbalance calculation unit 15D has a power generation plan {PV _t- (D _t -C _t )} obtained for the predicted PV power generation value and the actual PV power generation at each time t of a plurality of power generation patterns 40. The difference from the estimated power generation actual value of the power generation system 20 when the PV power generation predicted value for each time is PV _t is calculated as the predicted value of the imbalance for each time t. The estimated power generation value of the power generation system 20 is the power generation when the storage battery 25 is charged and discharged so as to be in accordance with the power generation plan with respect to the PV power generation predicted value PV _t at each time t of the plurality of power generation patterns 40. This is the output of the system 20. The estimated power generation performance of the power generation system 20 may be calculated by a control simulation or the like including the control of the storage battery 25.

Then, the planning unit 15A calculates the imbalance loss based on the predicted imbalance value and the imbalance unit price, and the charge / discharge plan and the charge / discharge plan and the charge / discharge plan so that the subtraction value obtained by subtracting the imbalance loss from the power sales revenue is maximized. Create a power generation plan.

Specifically, the plan creation unit 15A creates a charge / discharge plan and a power generation plan that maximizes the subtraction value obtained by subtracting the imbalance loss from the power sale revenue by using the objective function F'. The objective function F'is expressed by the following equation (7).

The variables of the above equation (7) are C _t and D _t , and their meanings are the same as those of the above equation (1). That is, C _t is the amount of charge to the storage battery 25 at time t, and D _t is the amount of discharge from the storage battery 25 at time t.

The parameters of the above equations (7) to (14) are as follows.
UP _t : Predicted value of the unit price of electricity sold at time t (yen / kWh)
PV _t : PV power generation predicted value (kWh) at time t
C _min : Minimum amount of power that can be charged in 30 minutes (kWh)
C _max : Maximum amount of power that can be charged in 30 minutes (kWh)
D _min : Minimum amount of power that can be discharged in 30 minutes (kWh)
D _max : Maximum amount of power that can be discharged in 30 minutes (kWh)
SoC _min : Operation lower limit of storage battery SoC SoC _max : Operation upper limit of storage battery SoC η _c : Charging efficiency of storage battery 25 η _D : Discharge efficiency of storage battery 25 IMB: Imbalance loss Pi: Generation of power generation pattern 40 identified by _i Probability i: Identification information of power generation pattern 40 N: Number of power generation patterns 40 UPIM _t : Predicted value of imbalance unit price (yen / kWh)
IM _{i, t} : Predicted value of imbalance at time t generated for the power generation pattern 40 identified by i

The meanings of UP _t , PV _t , C _min , C _max , D _min , D _max , SoC _min , SoC _max , η _c , and η _D are the same as those in the above equations (1) to (6). That is, the equations (10) to (14) are the same as the equations (2) to (6).

The objective function F'shown in the equation (7) is, that is, a function for subtracting the imbalance loss IMB shown in the equation (8) from the objective function F shown in the equation (1).

The planning unit 15A has a predicted value IM _{i, t} of the imbalance generated at each time t of each of the plurality of power generation patterns 40 created by the imbalance calculation unit 15D, and a predicted value of the imbalance unit price at each time t. The _{UPIM t} and the occurrence probability Pi of each of the power generation patterns 40 are substituted into the equation (8). By this process, the planning unit 15A calculates the imbalance loss IMB.

Further, the plan creation unit 15A calculates the objective function F in the same manner as described above, and further calculates the objective function F'.

Specifically, the planning unit 15A maximizes the objective function F', which is a subtraction value obtained by subtracting the imbalance loss from the power sale revenue after satisfying the constraints of the equations (9) to (14). , D _t and C _t . In other words, the planning unit 15A inputs the acquired and derived parameters into the equations (7) to (14), and the values of D _t and C _t at which the objective function F'is maximized and {PV _t- (. Find the value of D _t -C _t )}.

For example, the plan creation unit 15A modifies the charge / discharge plan and the power generation plan until the value of the objective function F'converges, and each time the charge / discharge plan and the power generation plan are revised, the predicted value IM of the imbalance at time t. A series of processes of _{i and t} calculation, imbalance loss IMB calculation, and objective function F'calculation are repeated. Then, the planning unit 15A obtains the values of D _t and C _t when the calculation result of the objective function F'converges as the optimum solution. For example, a genetic algorithm (GA) may be used to modify the charge / discharge plan and the power generation plan.

By the process of finding the optimum solution of the objective function F', the planning unit 15A maximizes the subtraction value obtained by subtracting the imbalance loss from the power sale revenue, and the charge amount Ct to the storage battery 25 and the storage battery at each time _t . Create a charge / discharge plan that defines the discharge amount _Dt from 25.

Further, the planning unit 15A is represented by {PV _t- (D _t -C _t )} in the equation (7) by obtaining the values of D _t and C _t that maximize the objective function F'. , Create a power generation plan that defines the amount of power generated by the power generation system 20 at each time t, which maximizes the subtraction value obtained by subtracting the imbalance loss from the power sales revenue. As the PV _t in the equation (7), the PV power generation predicted value PV _t at the time t of the power generation pattern 40A created as the expected value may be used.

Therefore, in this case, the plan creation unit 15A can create a charge / discharge plan and a power generation plan that maximize the objective function F'. That is, by creating a charge / discharge plan and a power generation plan that maximizes the subtraction value obtained by subtracting the imbalance loss from the power sale revenue, the plan creation unit 15A aims to maximize the power sale revenue in consideration of the imbalance loss. be able to.

The plan creation unit 15A may create a charge / discharge plan and a power generation plan for the upper and lower limits of the operating charge rate of the storage battery 25, which maximizes the subtraction value obtained by subtracting the imbalance loss from the power sale revenue.

That is, the planning unit 15A maximizes the operation upper limit SoC of the storage battery SoC, which is a constraint condition shown in the above equations (4) and (12), so that the subtraction value obtained by subtracting the imbalance loss from the power sale revenue is maximized. Margins are set in _max and the operating lower limit SoC _min of the storage battery SoC. Then, even if the plan creation unit 15A creates a charge / discharge plan and a power generation plan that maximizes the objective function F'using the operation upper limit SoC _max of the storage battery SoC with a margin and the storage battery SoC _min as constraints. good.

Specifically, the planning unit 15A creates a pattern of operating margins of a plurality of storage battery SoCs having different margins from each other. That is, the plan creation unit 15A creates a plurality of different combinations of at least one of the operation upper limit SoC _max of the storage battery SoC and the operation lower limit SoC _min of the storage battery SoC as a pattern of a plurality of storage battery SoC operation margins.

FIG. 8 is a diagram showing an example of a pattern of the storage battery SoC operation margin. FIG. 8 shows an example of an operation margin pattern of 35 patterns in which at least one of the operation upper limit SoC _max of the storage battery SoC and the operation lower limit SoC _min of the storage battery SoC is different. The number of operational margins to be created may be plural, and is not limited to 35 patterns.

Then, the plan creation unit 15A sets each of the created patterns of the plurality of operational margins as the constraint conditions of the upper and lower limits of the SoC of the above equation (4), and for each of the patterns of the plurality of operational margins, the above equation (1). ), The optimal solution that maximizes the objective function F is calculated. As the PV _t in the equation (1), the PV power generation predicted value PV _t at the time t of the power generation pattern 40A created as the expected value may be used.

Through these processes, first, the plan creation unit 15A creates a power generation plan that maximizes the predicted value of the power sale revenue represented by the objective function F for each of the patterns of the plurality of operation margins.

9A to 9C show the storage battery 25 when the storage battery 25 is controlled according to the power generation plan that maximizes the predicted value of the power sale revenue represented by the objective function F, which corresponds to each of the patterns of the plurality of operational margins. This is an example of the transition of 25 storage batteries SoC.

Returning to FIG. 2, the explanation will be continued. Then, the plan creation unit 15A creates a charge / discharge plan and a power generation plan in which the subtraction value obtained by subtracting the imbalance loss IMB from the objective function F calculated for each of the patterns of the plurality of operation margins is maximized. That is, the planning unit 15A uses the maximum objective function F calculated for each pattern of the plurality of operational margins, and the objective function F'represented by the equation (7) for each pattern of the plurality of operational margins. Create a charge / discharge plan and a power generation plan that maximizes.

Specifically, the planning unit 15A predicts the imbalance predicted value IM _{i, t} of each time t of the plurality of power generation patterns 40 created by the imbalance calculation unit 15D, and the imbalance unit price for each time t. The imbalance loss IMB is calculated by substituting the value _{UPIM t} and the occurrence probability Pi of each of the power generation patterns 40 into the equation (8).

Next, the plan creation unit 15A calculates the maximum objective function F'for each pattern of the created operation margin. Specifically, the planning unit 15A subtracts the imbalance loss IMB from each of the maximum objective functions F calculated for each of the patterns of the plurality of operational margins, so that each pattern of the plurality of operational margins can be obtained. , Calculate the maximum objective function F'.

Further, the planning unit 15A has the pattern of the operational margin used at the time of calculating the objective function F'which shows the highest value among the maximum objective functions F'calculated for each pattern of the plurality of operational margins, and the purpose thereof. The charge / discharge plan and power generation plan that maximizes the function F'are selected as the charge / discharge plan and power generation plan to be adopted.

Through these processes, the plan creation unit 15A creates a charge / discharge plan and a power generation plan of the operation margin pattern in which the subtraction value obtained by subtracting the imbalance loss from the power sale revenue is maximized. That is, the plan creation unit 15A can create a charge / discharge plan and a power generation plan for the upper and lower limits of the operating charge rate of the storage battery 25, which maximizes the subtraction value obtained by subtracting the imbalance loss from the power sale revenue. As described above, the upper and lower limits of the operating charge rate of the storage battery 25 are the operating lower limit SoC _min of the storage battery SoC and the operating upper limit SoC _max of the storage battery SoC.

This will be described with reference to FIG. FIG. 10 is an explanatory diagram of an example of a charge / discharge plan and a power generation plan of the upper limit and the lower limit of the operating charge rate of the storage battery 25 that maximizes the subtraction value obtained by subtracting the imbalance loss from the power sale revenue.

FIG. 10 shows the electric energy (kWh) with respect to the time t, the storage battery SoC (%) with respect to the time t, and the predicted value (yen / kWh) of the imbalance unit price with respect to the time t.

The diagram 32 shows the PV power generation predicted value PV _t at time t. FIG. 34 shows a power generation plan of the power generation system 20. In other words, FIG. 34 shows the power generation system output according to the power generation plan. The diagram 33 shows the actual power generation value of PV26. FIG. 35'represents the output of the power generation system 20 on the day when the charging / discharging of the storage battery 25 is controlled so as to realize the power generation system output according to the power generation plan of the power generation system 20. Further, in FIG. 10, D _t and C _t represent charge / discharge control according to the charge / discharge plan of the storage battery 25. In FIG. 10, D _t'and C _t'represent charge / discharge control for realizing the power generation system output according to the power generation plan.

FIG. 38 shows the imbalance when the charge / discharge control is performed according to the charge / discharge plan. The diagram 39 and the area 39A show the imbalance when the charge / discharge control different from the charge / discharge plan is performed. In other words, the diagram 39 and the area 39A show the imbalance when the charge / discharge control for realizing the power generation system output according to the power generation plan is performed.

FIG. 36 is a predicted value of the transition of the storage battery SoC at the time of planning within the range of the operation lower limit SoC _min of the storage battery SoC and the operation upper limit SoC _max of the storage battery SoC, which is the pattern of the operation margin that maximizes the objective function F'. be. FIG. 37 is a transition of the storage battery SoC when the power generation system control unit 15B performs charge / discharge control for realizing the power generation system output according to the power generation plan. FIG. 44 shows the predicted value UPIM _t of the imbalance unit price at time t.

As shown in FIG. 44, the predicted value UPIM _t of the imbalance unit price fluctuates according to the time t. As shown in FIGS. 32 and 33, the PV power generation predicted value at time _t of PV26 and the actual power generation value of PV 26 have, for example, a large amount of power generation during the daytime. Further, as shown in the diagram 32 and the diagram 33, an imbalance may occur due to a difference between the PV power generation predicted value PV _t used at the time of creating the charge / discharge plan and the power generation plan and the actual power generation value of PV 26. (See diagram 38).

The power generation system control unit 15B charges the storage battery 25 so that, for example, the actual power generation system output of the power generation system 20 (see diagram 35') becomes the power generation system output (see diagram 34) as planned for power generation. Control the discharge.

Although the capacity of the storage battery 25 is limited, the plan creation unit 15A has created an operation margin charge / discharge plan and a power generation plan that maximize the subtraction value obtained by subtracting the imbalance loss from the power sale revenue. Therefore, as shown in FIG. 36, at the stage of creating the charge / discharge plan and the power generation plan, the operation lower limit SoC _min of the storage battery SoC and the operation upper limit SoC _max of the storage battery SoC include a value including an operation margin, that is, a reserve capacity. It is a value.

Since the charge / discharge plan and the power generation plan are created with the storage SoC of the storage battery 25 having an operation margin, when the power generation system control unit 15B controls the storage battery 25, the imbalance is increased by the amount corresponding to the reserve capacity of the storage battery 25. It is possible to perform charge / discharge control to suppress.

Specifically, for example, the power generation system control unit 15B plans to charge / discharge during the time zone B from 6:00 to 9:00 until the storage SoC of the storage battery 25 reaches 100%, which is the maximum storage SoC of the storage battery 25. The charge / discharge control D _{t'and C t'are different from the charge / discharge control D t and C t} . That is, in the time zone B, the power generation system control unit 15B performs charge / discharge control so that the power generation system output as planned for power generation can be obtained. During the time period from 9:00 to 17:00 when the storage SoC of the storage battery 25 is 100%, the power generation system control unit 15B performs charge / discharge control according to _Dt and _Ct , which are charge / discharge controls of the charge / discharge plan. .. Further, the power generation system control unit 15B has D _t and C _t , which are charge / discharge controls of the charge / discharge plan, during the time zone C from 17:00 to 18:00 when the storage SoC of the storage battery 25 is less than 100 and exceeds 0%. The charge / discharge control D _t'and C _t'are different from those of the above. That is, in the time zone C, the power generation system control unit 15B performs charge / discharge control so that the power generation system output as planned for power generation can be obtained. Then, in the time zone after 18:00 when the storage SoC of the storage battery 25 becomes 0%, the power generation system control unit 15B performs charge / discharge control according to _Dt and _Ct , which are charge / discharge controls of the charge / discharge plan. ..

Here, it is possible to suppress imbalance by providing an operation margin in the storage SoC of the storage battery 25, but the revenue from selling electricity may decrease depending on the degree of the operation margin. However, the charge / discharge plan and the power generation plan used by the power generation system control unit 15B at the time of control shown in FIG. 10 are the charge / discharge plan and the power generation plan of the operation margin in which the subtraction value obtained by subtracting the imbalance loss from the power sale revenue is maximized. be.

Therefore, as shown in FIG. 10, the power generation system control unit 15B can perform charge / discharge control that effectively suppresses the occurrence of imbalance in the time zone B and the time zone C in which the predicted value UPIM _t of the imbalance unit price is high. can.

That is, the plan creation unit 15A creates an imbalance loss by creating a charge / discharge plan and a power generation plan for the upper and lower limits of the operating charge rate of the storage battery 25, which maximizes the subtraction value obtained by subtracting the imbalance loss from the power sale revenue. It is possible to maximize the profit from selling electricity in consideration of the above.

The plan creation unit 15A may regenerate the charge / discharge plan and the power generation plan every unit time when the created charge / discharge plan and the power generation plan are executed by the power generation system control unit 15B.

That is, the plan creation unit 15A may recreate the charge / discharge plan and the power generation plan based on the remaining charge of the storage battery 25 every unit time such as 30 minutes. For example, the planning unit 15A maximizes the objective function F or the objective function F'when the storage battery SoC, which is the charge rate of the storage battery 25, becomes the operation lower limit SoC _min or less or the operation upper limit SoC _max or more. It is preferable to recreate the discharge and power generation plans.

In this case, the power generation system control unit 15B may control the storage battery 25 of the power generation system 20 based on the recreated charge / discharge plan and power generation plan.

Next, the procedure of information processing executed by the management device 10 will be described.

FIG. 11 is a flowchart showing an example of the flow of the charge / discharge plan and the power generation plan creation process that maximizes the objective function F.

The planning unit 15A acquires the PV power generation predicted value (step S100). In addition, the plan creation unit 15A acquires the unit price for selling electric power (step S102).

The planning unit 15A creates a charge / discharge plan and a power generation plan that maximizes the predicted value of the power selling revenue of the power generation system 20 based on the PV power generation predicted value acquired in step S100 and the power selling unit price acquired in step S102. Create (step S104). The planning unit 15A calculates the optimum solution of the optimization problem that maximizes the objective function F of the equation (1) under the constraint conditions shown in the equations (2) to (6). By calculating the optimum solution that maximizes the objective function F, the plan creation unit 15A calculates the charge / discharge plan and the power generation plan for each unit time for each power generation system 20.

The display control unit 15E displays the charge / discharge plan and the power generation plan created in step S104 on the display unit 13 (step S106).

The power generation system control unit 15B executes the charge / discharge plan and the power generation plan created in step S104 (step S108). For example, the power generation system control unit 15B controls the storage battery 25 of the power generation system 20 based on the charge / discharge plan and the power generation plan created in step S104. Then, this routine is terminated.

By executing the processes of steps S100 to S108, the plan creation unit 15A can create a charge / discharge plan and a power generation plan that maximize the predicted value of the power sale revenue.

FIG. 12 is a flowchart showing an example of the flow of the charge / discharge plan and the power generation plan creation process that maximizes the objective function F'. That is, FIG. 12 is a flowchart showing an example of the flow of the charge / discharge plan and the power generation plan creation process that maximizes the subtraction value obtained by subtracting the imbalance loss from the power sale revenue.

The power generation pattern creation unit 15C creates a power generation pattern 40 of the predicted power generation value of PV26 (step S200). By the process of step S200, for example, a plurality of power generation patterns 40 shown in FIG. 5 are created.

The planning unit 15A acquires the imbalance unit price (step S202). The plan creation unit 15A calculates the initial values of the storage battery charge / discharge plan and the power generation plan (step S204). The initial values of the storage battery charge / discharge plan and the power generation plan can be, for example, a charge / discharge plan and a power generation plan that maximize the objective function F.

The imbalance calculation unit 15D calculates an imbalance predicted value which is the difference between the power generation plan and the output of the power generation system 20 according to the power generation pattern 40 created in step S200 (step S206).

The planning unit 15A calculates the imbalance loss based on the imbalance predicted value calculated in step S206 and the imbalance unit price acquired in step S202 (step S208).

The planning unit 15A calculates the objective function F'(step S210). The planning unit 15A calculates the objective function F'by calculating a subtraction value obtained by subtracting the imbalance loss calculated in step S208 from the revenue from selling electricity. The value of the objective function F calculated by performing the processes of steps S100 to S104 shown in FIG. 11 may be used for the power sale revenue used for calculating the objective function F'. Further, as the PV power generation predicted value PV t used in the calculation of the objective function F, the PV power generation predicted value PV _t at time _t of the power generation pattern 40A created as the expected value in step S200 may be used.

Next, the plan creation unit 15A determines whether or not the objective function F'has converged (step S212). If an affirmative judgment is made in step S212 (step S212: Yes), this routine ends.

If a negative determination is made in step S212 (step S212: No), the process proceeds to step S214. In step S214, the plan creation unit 15A modifies the charge / discharge plan and the power generation plan (step S214). The planning unit 15A uses a genetic algorithm or the like to obtain the values of D _t and C _t derived by the calculation of the objective function F'in step S210 and the values of {PV _t- (D _t -C _t )}. Correct. Then, the process returns to step S206.

The planning unit 15A obtains an optimum solution that maximizes the objective function F'by executing the processes of steps S200 to S214. That is, the plan creation unit 15A can create a charge / discharge plan and a power generation plan that maximizes the subtraction value obtained by subtracting the imbalance loss from the power sale revenue by the process of obtaining the optimum solution.

FIG. 13 is a flowchart showing an example of the flow of the charge / discharge plan and the power generation plan creation process of the operation margin that maximizes the objective function F'. That is, FIG. 13 is a flowchart showing an example of the flow of the charge / discharge plan and the power generation plan creation process of the upper limit and the lower limit of the operation charge rate of the storage battery 25 that maximizes the subtraction value obtained by subtracting the imbalance loss from the power sale revenue. be.

The power generation pattern creation unit 15C creates a power generation pattern 40 of the predicted power generation value of PV26 (step S300). By the process of step S300, for example, a plurality of power generation patterns 40 shown in FIG. 5 are created.

The planning unit 15A creates a plurality of patterns of operating margins of a plurality of storage battery SoCs having different margins from each other (step S302). The planning unit 15A creates a plurality of different combinations of at least one of the operation upper limit SoC _max of the storage battery SoC and the operation lower limit SoC _min of the storage battery SoC as a pattern of a plurality of storage battery SoC operation margins. By the process of step S302, for example, a pattern of the operation margin of 35 patterns shown in FIG. 8 is created.

Then, the plan creation unit 15A calculates the objective function F for each of the patterns of the plurality of operation margins created in step S302 (step S304). That is, the plan creation unit 15A sets each of the patterns of the plurality of operation margins created in step S302 as the constraint conditions of the upper and lower limits of the SoC of the above equation (4), and for each of the patterns of the plurality of operation margins, the above The optimum solution that maximizes the objective function F represented by the equation (1) is calculated. As the PV _t in the equation (1), the PV power generation predicted value PV _t at time t of the power generation pattern 40A created as an expected value among the power generation patterns 40 created in step S300 may be used.

Through these processes, first, the plan creation unit 15A creates a power generation plan that maximizes the predicted value of the power sale revenue represented by the objective function F for each of the patterns of the plurality of operation margins.

Next, the plan creation unit 15A calculates the maximum objective function F'for each pattern of the operation margin created in step S302 (step S306).

Then, the planning unit 15A describes the pattern of the operation margin used at the time of calculating the objective function F'which shows the highest value among the maximum objective function F'calculated for each pattern of the plurality of operation margins, and the purpose thereof. The charge / discharge plan and power generation plan that maximizes the function F'are selected as the charge / discharge plan and power generation plan to be adopted (step S308). Then, this routine is terminated.

The plan creation unit 15A creates a charge / discharge plan and a power generation plan of an operation margin pattern that maximizes the subtraction value obtained by subtracting the imbalance loss from the power sale revenue by executing the processes of steps S300 to S308. Can be done. That is, the plan creation unit 15A can create a charge / discharge plan and a power generation plan for the upper and lower limits of the operating charge rate of the storage battery 25, which maximizes the subtraction value obtained by subtracting the imbalance loss from the power sale revenue.

As described above, the management device 10 of the present embodiment includes the planning unit 15A. The planning unit 15A predicts the power sales revenue for each power generation system 20 having the PV26 (renewable energy power source) and the storage battery 25 charged only from the PV26, based on the power generation predicted value of the PV26 and the power selling unit price. A charge / discharge plan for the storage battery 25 and a power generation plan for the power generation system 20 that maximize the value are created.

As described above, the plan creation unit 15A of the management device 10 of the present embodiment is a charge / discharge plan that maximizes the predicted value of the power sale revenue for each power generation system 20 having the PV26 and the storage battery 25 charged only from the PV26. And make a power generation plan.

Therefore, the management device 10 of the present embodiment can create a charge / discharge plan and a power generation plan for increasing the profit of selling electricity of renewable energy such as PV26, and is in a time zone when the unit price of power selling is high and the power is insufficient. It is possible to create a charge / discharge plan and a power generation plan for increasing the amount of power generated by the power generation system 20 of the above.

Therefore, the management device 10 of the present embodiment can achieve load leveling of the entire power system 2.

Further, the planning unit 15A of the management device 10 of the present embodiment calculates the imbalance loss based on the predicted imbalance value and the imbalance unit price, and maximizes the subtracted value obtained by subtracting the imbalance loss from the power sales revenue. It is possible to create a charge / discharge plan and a power generation plan or a charge / discharge plan and a power generation plan for the upper and lower limits of the operating charge rate of the storage battery 25.

Therefore, in addition to the above effects, the management device 10 of the present embodiment can create a charge / discharge plan and a power generation plan that maximize the subtraction value obtained by subtracting the imbalance loss from the power sale revenue.

The program for executing the information processing in the above-described embodiment has a module configuration including each of the plurality of functional units. As actual hardware, for example, the CPU is a ROM (Read Only). By reading an information processing program from Memory) or HDD and executing it, each of the above-mentioned plurality of functional units is loaded into RAM (Random Access Memory), and each of the above-mentioned plurality of functional units is RAM (main memory). It is designed to be generated above. It is also possible to realize a part or all of each of the plurality of functional units described above by using dedicated hardware such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array).

Although the embodiments of the present disclosure have been described above, the above embodiments are presented as examples and are not intended to limit the scope of the present disclosure. The above-mentioned novel embodiment can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. The above embodiments are included in the scope or gist of the present disclosure, as well as the inventions described in the claims and the equivalent scope thereof.

10 ... management device, 15A ... plan creation unit, 15B ... power generation system control unit, 15C ... power generation pattern creation unit, 15D ... imbalance calculation unit, 20 ... power generation system, 25 ... storage battery, 26 ... PV

Claims (9)

Each power generation system has a renewable energy power source and a storage battery that is charged only from the renewable energy power source and discharged to the electric power system, and the discharge from the storage battery is made to flow backward to the electric power system to sell the electric power. A planning unit that creates a charge / discharge plan for the storage battery and a power generation plan for the power generation system that maximizes the predicted value of power sales revenue based on the predicted power generation value of the renewable energy power source and the unit price of power sales.
A management device equipped with. The planning department
The charge / discharge plan and the power generation plan in which the reserve capacity is set in at least one of the upper limit and the lower limit of the operating charge rate of the storage battery are created.
The management device according to claim 1. A power generation system control unit that controls the power generation system according to the charge / discharge plan and the power generation plan.
The management device according to claim 1 or 2. The power generation pattern creation unit that creates the power generation pattern of the predicted power generation value of the renewable energy power source,
An imbalance calculation unit that calculates an imbalance prediction value based on the power generation pattern,
Equipped with
The planning department
The charge / discharge plan and the power generation plan that calculate the imbalance loss based on the predicted value of the imbalance and the imbalance unit price and maximize the subtraction value obtained by subtracting the imbalance loss from the power sale revenue are created.
The management device according to any one of claims 1 to 3. The power generation pattern creation unit that creates the power generation pattern of the predicted power generation value of the renewable energy power source,
An imbalance calculation unit that calculates an imbalance prediction value based on the power generation pattern,
Equipped with
The planning department
The upper and lower limits of the operating charge rate of the storage battery, which calculates the imbalance loss based on the predicted imbalance value and the imbalance unit price and maximizes the subtraction value obtained by subtracting the imbalance loss from the power sales revenue. Create a charge / discharge plan and the power generation plan,
The management device according to any one of claims 1 to 3. The planning department
The charge / discharge plan and the power generation plan are recreated every unit time based on the remaining charge of the storage battery.
The management device according to any one of claims 1 to 5. The power selling unit price is a transaction price predicted value.
The management device according to any one of claims 1 to 6. It is a management method executed by the management device.
It has a renewable energy power source and a storage battery charged only from the renewable energy power source, and the power generation prediction of the renewable energy power source is made for each power generation system that reverse-flows the discharge from the storage battery to the power system and sells the power. A step of creating a charge / discharge plan of the storage battery and a power generation plan of the power generation system that maximizes the predicted value of the power sale revenue based on the value and the power sale unit price.
Management methods including. On the computer
It has a renewable energy power source and a storage battery charged only from the renewable energy power source, and the power generation prediction of the renewable energy power source is made for each power generation system that reverse-flows the discharge from the storage battery to the power system and sells the power. A management program for executing the steps of creating a charge / discharge plan of the storage battery and a power generation plan of the power generation system that maximizes the predicted value of the power sale revenue based on the value and the power sale unit price.

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