JP2023092709A - Power managing device, power managing system and power managing program - Google Patents

Abstract

To provide a power managing device capable of prompting consumers to cooperate for an imbalance avoidance.SOLUTION: A power managing device includes: an imbalance information obtaining unit 13 that obtains a price signal which is information decided on the basis of an imbalance fee unit price and which is information representing a profit of a consumer as of when an imbalance avoidance is carried out using a power resource of the consumer; a demand predicting unit 20 that predicts a power demand of the consumer for a certain time period using actual values of past power demands of the consumer; and an operation plan creating unit 22 which calculates, using a contracted unit price that is a unit price of an electricity fee per a time slot in accordance with a fee plan of the consumer, the price signal, and the prediction result by the demand predicting unit 20, an index relating to the profit when the consumer operates the power resource corresponding to the imbalance avoidance for the certain time period, determines, using the index, whether or not the consumer should perform the imbalance avoidance for the certain time period, and creates the operation plan of the power resource of the consumer on the basis of the determination result.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a power management device, a power management system, and a power management program that manage power of consumers.

The number of consumers who own storage batteries to control electricity charges, store natural energy, and secure emergency power sources is increasing, and the number of consumers who own electric vehicles (EVs) equipped with storage batteries is also increasing. ing. Patent Document 1 discloses a technique for effectively utilizing a storage battery. In the technology described in Patent Document 1, regarding storage batteries installed in buildings, the power consumption of consumers in the building is predicted based on actual values. Based on information on the price of electricity such as the price, a charge/discharge plan for the storage battery is created so as to optimize the cost.

JP 2019-33566 A

On the other hand, in recent years, with the increase in the number of products traded in the electricity market, opportunities for retailers to conduct electricity and control power transactions are increasing. Retailers are required to pay imbalance charges when there is a difference between the planned demand curve and actual values. Along with this, the loss amount of the retailer due to the occurrence of insufficient imbalance and the selling price of surplus power at the time of occurrence of surplus imbalance fluctuate. Elimination of the imbalance is being considered by adjusting the charge/discharge of the storage battery owned by the consumer and by adjusting the load equipment that consumes power. Not cooperative in coordinating for avoidance. In the technology described in Patent Document 1, it is not assumed that consumers will cooperate with the retailer's imbalance avoidance. It is not possible to promote the cooperation of consumers. It is desired to promote the cooperation of consumers to avoid imbalance.

The present disclosure has been made in view of the above, and an object of the present disclosure is to obtain a power management device that can promote cooperation of consumers to avoid imbalance.

In order to solve the above-described problems and achieve the object, the power management apparatus according to the present disclosure uses the information determined based on the imbalance charge unit price and the power resource of the consumer to avoid the imbalance. An imbalance information acquisition unit that acquires the price signal, which is information indicating the profit of the consumer when the demand is a prediction unit; The power management device further uses the contract unit price, which is the unit price of the electricity charge for each time period according to the price plan of the consumer, the price signal, and the prediction result of the demand prediction unit, to determine the Calculate an index related to profits when operating electric power resources corresponding to imbalance avoidance, use the index to determine whether or not consumers will perform imbalance avoidance for a certain period of time, and based on the result of this determination and an operation plan creation unit that creates an operation plan for the power resource of the consumer.

The power management apparatus according to the present disclosure has the effect of being able to promote the cooperation of consumers to avoid imbalance.

1 is a diagram showing a configuration example of a power management system according to an embodiment; FIG. Flowchart showing an example of an operation plan creation processing procedure in the power management device according to the embodiment A diagram for explaining a second resource operation plan according to the embodiment. A diagram showing an example of a second resource operation plan when avoiding surplus imbalance FIG. 1 shows a configuration example of a computer system that implements a power management device according to an embodiment;

A power management device, a power management system, and a power management program according to embodiments will be described below in detail with reference to the drawings.

Embodiment.
FIG. 1 is a diagram illustrating a configuration example of a power management system according to an embodiment; A power management system 4 of this embodiment includes a power management device 1 and a retailer device 2 . A retailer device 2 is a device managed and operated by an electricity retailer. The power management device 1 is, for example, a device managed by a business operator called an aggregator that bundles and manages the power of a plurality of consumers. Note that FIG. 1 illustrates one consumer facility 3 that is a consumer facility, but generally, the power management device 1 manages the power of each consumer facility 3 of a plurality of consumers. .

The consumer facility 3 includes a load facility that consumes power, a storage battery, a photovoltaic power generation facility, and the like. Equipment constituting the customer equipment 3 may be different depending on the customer. The customer equipment 3 is provided with a power amount measuring device called a smart meter (not shown), and the measuring device transmits the measured power amount to the power management device 1 . Further, when the consumer equipment 3 includes a storage battery, the power conditioner that controls the storage battery may transmit the measured value of the charge/discharge power of the storage battery to the power management device 1 . When the consumer facility 3 includes a photovoltaic power generation facility, a power conditioner that constitutes the photovoltaic power generation facility may transmit the measured value of the generated power to the power management device 1 .

Retailers are required to match production and demand at planned values. If there is a difference between the planned value and the actual value, and a shortage imbalance occurs in which the actual demand exceeds the power generation, the retailer will pay the (shortage) imbalance fee to the power transmission and distribution company. In addition, when a difference occurs between the planned value and the actual value, and a surplus imbalance occurs in which the power generation exceeds the demand in the actual result, the retailer purchases power from the power transmission and distribution company at the (surplus) imbalance rate. The imbalance charge unit price, which is the unit price of the imbalance charge for each of the deficit imbalance and the surplus imbalance, is determined based on the market price of electricity, so the unit price of the imbalance charge fluctuates as the market price of electricity fluctuates. do. It is desirable for the retailer to avoid insufficient imbalance as much as possible when the imbalance charge unit price is high. Also, when the imbalance charge unit price is low, it is desirable to avoid excessive imbalance as much as possible.

In the present embodiment, the retailer uses information that is determined based on the imbalance charge unit price and indicates the profit of the consumer when the imbalance is avoided using the power resource of the consumer. A certain price signal is sent to the power management device 1 . The price signal is, for example, information indicating, for each time period, the unit price paid to the customer when the customer cooperates in avoiding the imbalance (hereinafter referred to as the customer imbalance unit price). For example, a retailer predicts the time period in which an imbalance will occur based on the supply and demand plan for the electricity that is managed by the retailer. (predicted value of ) and are used to determine the price signal. Although illustration is omitted, the retailer manages consumers other than the consumers under the control of the aggregator that manages the power management device 1 shown in FIG. A plan is a supply and demand plan for the entirety of these own managed objects. The retailer, for example, determines the consumer imbalance unit price based on the imbalance charge unit price for a time slot in which no imbalance is expected to occur, and uses the determined consumer imbalance unit price as a price signal. For example, the retailer may determine the consumer imbalance unit price by multiplying the imbalance charge unit price by a predetermined ratio, such as setting 50% of the imbalance charge unit price as the consumer imbalance unit price. Alternatively, the consumer imbalance unit price may be determined by subtracting a certain amount from the imbalance charge unit price, or the consumer imbalance unit price may be determined by a method other than these methods. Also, retailers may choose not to set price signals during times when imbalances are not expected to occur. That is, for example, the retailer may set the price signal to 0 yen for the time period during which no imbalance is expected to occur.

In addition, the method of determining the price signal in the retail business is not limited to the above example. A price signal may be determined such that Note that the power generation unit price for consumers managed by the aggregator includes not only the unit price for power generated by a generator, but also the apparent unit price for power generation by suppressing demand. For example, the retailer transmits multiple patterns of "power generation unit price of consumers managed by the aggregator" to the power management apparatus 1 as price signals, and the power management apparatus 1 uses the multiple patterns of price signals to Create a power generation plan for the power generation facilities. The retailer compares the power generation plan received from the power management device 1 and the power generation plan of the adjustment-required generator, and adopts the power generation plan with the lower cost.

The power management apparatus 1 uses the price signal to create an operation plan for the customer facility 3 so as to reduce the cost borne by the customer who can adjust the amount of demand or supply of power. For example, the power management device 1 acquires measured values received from the metering device, power conditioner, etc. of the consumer equipment 3 as actual values, predicts the amount of power generation and power consumption using the acquired actual values, and predicts An operation plan for the consumer equipment 3 is created using the results and the information on the electricity charges. The information on electricity charges includes the unit price of electricity charges for each time zone according to the contracted price plan of each consumer, and the price signal obtained from the retailer device 2 . The power management device 1 transmits an operation plan for each consumer and price information corresponding to the operation plan to the retailer device 2 . The charge information transmitted by the power management apparatus 1 is information indicating conditions for settlement of electricity charges for each consumer.

In the present embodiment, as described above, the power management device 1 uses the price signal presented by the retailer to create an operation plan so as to reduce the cost borne by the consumer. It is possible to create an operation plan that suppresses the occurrence of imbalance while considering the This can promote the cooperation of consumers in avoiding imbalance.

As shown in FIG. 1, the power management apparatus 1 of the present embodiment includes a consumer information storage unit 11, an equipment information storage unit 12, an imbalance information acquisition unit 13, a plan creation unit 14, a plan determination unit 15, a plan storage 16 , a control execution unit 17 , an actual value acquisition unit 18 , an actual demand value storage unit 19 , a demand forecasting unit 20 and a plan information transmitting unit 21 .

The customer information storage unit 11 stores customer information, which is information about charges for each customer. The consumer information includes information indicating the unit price of electricity charges for each time zone according to the contract details. The consumer information may include permissible information indicating permissible conditions regarding cooperation in avoiding imbalance. Information indicating that there are no restrictions is stored as allowable information for a consumer who does not define an allowable condition, that is, a consumer who agrees to avoid any imbalance. For consumers who do not comply with the avoidance of imbalance, information indicating that they do not comply with the avoidance of imbalance is stored as permissible information. If the consumer facility 3 includes a plurality of facilities, the permissible condition may be defined for each facility. The information indicating the unit price of the electricity bill for each time slot may be information indicating a price plan corresponding to the customer, or may be information indicating the unit price of the electricity bill for each time slot. In the former case, the consumer information storage unit 11 stores rate plan information indicating the unit price of the electricity rate for each time period for each rate plan. Further, when all consumers managed by the aggregator have the same rate plan, the consumer information storage unit 11 only needs to store rate plan information indicating the unit price of the electricity rate for each time slot of the rate plan. , the customer charge information may include only the allowable information, or the customer charge information itself may not be used. The customer charge information may be stored in the customer information storage unit 11 by being input by an operator using an input means (not shown), or may be transmitted from another device and stored in the customer information storage unit 11. good too.

The equipment information storage unit 12 stores equipment information, which is information about the customer equipment 3 for each customer. The facility information includes, for example, for a consumer who owns a storage battery, the capacity of the storage battery, the upper and lower limits of SOC (State Of Charge), the rated value of the power conditioner that controls the storage battery, and the like. For consumers who own power generation facilities, the rated values of solar power generation facilities are included. The facility information may be stored in the facility information storage unit 12 by being input by an operator using input means (not shown), or may be transmitted from another device and stored in the facility information storage unit 12 .

The imbalance information acquisition unit 13 receives a price signal from the retailer device 2 and outputs the received price signal to the plan creation unit 14 .

The plan creating unit 14 and the plan determining unit 15 constitute an operation plan creating unit 22 . The operation plan creation unit 22 uses the contract unit price, which is the unit price of the electricity charge for each time period according to the price plan of the customer, the price signal, and the prediction result by the demand forecasting unit 20, calculates an index related to the profit when operating the power resource corresponding to the imbalance avoidance. The operation plan creation unit 22 uses the index to determine whether or not the consumer will avoid the imbalance during a certain period of time, and creates an operation plan for the power resource of the consumer based on the result of this determination. Specifically, the operation plan creation unit 22 creates an operation plan that reflects the operation corresponding to the imbalance avoidance of the customer based on the index, when the customer can obtain a profit by performing the imbalance avoidance. create. In the example shown in FIG. 1, the plan creation unit 14 and the plan determination unit 15 are separated, but the operation plan creation unit 22 that integrates the plan determination unit 15 and the plan creation unit 14 may be provided. .

The plan creation unit 14 generates prediction information indicating the prediction result by the demand prediction unit 20, customer information stored in the customer information storage unit 11, equipment information stored in the equipment information storage unit 12, Using the price signal received from the balance information acquisition unit 13, an operation plan for a certain period of power resources in the customer equipment 3 is created for each customer. A power resource is a facility capable of adjusting power, and includes, for example, a storage battery and power generation facility, but may be a load facility when the power of the load facility can be adjusted. The fixed period is, for example, one day the next day, but is not limited thereto, and may be two days or one week. In the following description, it is assumed that the fixed period is one day on the following day.

Specifically, the plan creation unit 14 creates a first resource operation plan, which is an operation plan for the customer equipment 3 when imbalance avoidance is not performed, and an operation plan for the customer equipment 3 when imbalance avoidance is performed. A second resource operation plan is created and stored in the plan storage unit 16 . The first resource operation plan and the second resource operation plan are created, for example, so as to optimize the profit of the consumer. Optimization of the consumer's profit means, for example, minimization of the cost borne by the consumer. The plan creation unit 14 stores both the cost (expense) of the customer corresponding to the first resource operation plan and the cost of the customer corresponding to the second resource operation plan in the plan creation unit 14 . The plan creation unit 14 also corresponds information indicating an imbalance avoidance time zone, which is a time zone for which costs are calculated on the premise of cooperating in avoiding imbalance in the creation of the second resource operation plan, with the second resource operation plan. and store it in the plan storage unit 16. The information indicating the imbalance avoidance time period includes information indicating whether the cooperation corresponds to avoidance of insufficient imbalance or avoidance of surplus imbalance for each time period. Alternatively, information indicating an imbalance avoidance time period may be created for each of the avoidance of insufficient imbalance and the avoidance of excess imbalance. Also, the plan creating unit 14 creates a demand and supply plan for the customer based on the determination result of the plan determining unit 15 and stores the demand and supply plan in the plan storage unit 16 .

The plan determination unit 15 determines which one of the first resource operation plan and the second resource operation plan is to be used by using the respective costs of the first resource operation plan and the second resource operation plan for each consumer. and notifies the planning unit 14 of the decision result. Specifically, using an index that is the difference between the cost corresponding to the first resource operation plan and the cost corresponding to the second resource operation plan, it is determined whether or not the consumer performs imbalance avoidance. A power resource operation plan for the consumer is determined based on the determination result. This index is an index relating to the profit when the consumer operates the electric power resource corresponding to imbalance avoidance in a certain period of time, and specifically, it is, for example, the above-described cost difference. The plan determination unit 15 leaves the determined operation plan of the first resource operation plan and the second resource operation plan in the plan storage unit 16 and deletes the other operation plan.

The control execution unit 17 controls the consumer equipment 3 as power resources based on the operation plan stored in the plan storage unit 16 . As shown in FIG. 1 , the control execution section 17 includes a command value creation section 171 and a command value transmission section 172 . For example, with respect to the storage battery of the consumer equipment 3, the command value creation unit 171 generates a measurement value that is the actual value of the charge/discharge power acquired by the actual value acquisition unit 18 from the power conditioner that controls the storage battery for each control cycle. , and the operation plan stored in the plan storage unit 16, feedback control is performed to create command values for charging and discharging the storage battery. The command value may be the charge power or the discharge power itself, or an amount by which the charge power is increased or the discharge power is increased. The command value transmission unit 172 transmits the command value created by the command value creation unit 171 to the consumer equipment 3 . The control cycle is, for example, one minute, and the measured value is obtained every minute, but the control cycle is not limited to this example. Moreover, the control method of the consumer equipment 3 is not limited to this example.

The actual value acquisition unit 18 acquires the measured value of the electric energy from the metering device of the consumer facility 3 and stores it in the actual demand value storage unit 19 as the measured electric energy value. Further, the actual value acquisition unit 18 acquires the measured value of the power generation amount from the consumer equipment 3 and stores the acquired measured value in the actual demand value storage unit 19 as the power generation amount measured value. The measured value of power generation may be obtained by a metering device that measures only the amount of power generated, or it may be a measurement made by a power generation facility such as a power conditioner measurement value in a photovoltaic power generation facility. can be a value. Further, the actual value acquiring unit 18 acquires from the consumer equipment 3 measured values relating to the customer equipment 3 to be controlled by the control executing unit 17 and outputs the measured values to the control executing unit 17 . For example, the actual value acquiring unit 18 acquires the measured value of the charge/discharge power of the storage battery in the consumer equipment 3 and outputs the acquired measured value to the control execution unit 17 .

The demand forecasting unit 20 predicts the power demand of the consumer for a certain period, which is the period for which the operation plan is to be created, using the actual value of the power demand of the consumer. Demand and power generation amount are predicted using the power amount measurement value and power generation amount measurement value stored in the actual demand value storage unit 19 . The demand prediction unit 20 includes a power generation amount prediction unit 201 and a demand curve creation unit 202, as shown in FIG. The power generation amount prediction unit 201 uses the power generation amount measurement value stored in the actual demand value storage unit 19 to predict the power generation amount for each time slot in a certain period for which the operation plan is created, and calculates the predicted power generation amount. It outputs to the plan preparation part 14 as prediction information. For forecasting the power generation amount, forecast information such as the weather and the amount of solar radiation obtained from a weather information providing device (not shown) may be used. The demand curve creation unit 202 predicts the demand curve, which is the power consumption for each time slot in a certain period of time, using the measured power amount stored in the actual demand value storage unit 19, and uses the predicted demand curve as prediction information. Output to the plan creation unit 14 . For example, the demand curve creation unit 202 may use the average value calculated for each time period for each day of the week or for each division of weekdays, weekends, and holidays as the demand curve, and furthermore, for each time period classified by temperature. The average value calculated in 1 may be used as the demand curve. The power generation amount prediction method and the demand curve prediction method are not limited to the examples described above, and any method may be used. Note that the demand prediction unit 20 may predict a demand curve for a consumer whose power generation equipment is not included in the consumer equipment 3 .

The plan information transmission unit 21 transmits the operation plan (first resource operation plan or second resource operation plan described above) for each consumer stored in the plan storage unit 16 and the supply and demand plan as plan information to the retailer apparatus 2. Send to At this time, the plan information transmitting unit 21 stores information indicating an imbalance avoidance time zone associated with the operation plan stored in the plan storage unit 16, that is, when the information is stored in the plan storage unit 16. If the current operation plan is the second resource operation plan, information indicating the imbalance avoidance time zone is transmitted to the retailer device 2 together with the operation plan as charge information. Further, when the operation plan stored in the plan storage unit 16 is not associated with the information indicating the imbalance avoidance time zone, the plan information transmission unit 21 detects that the operation plan stored in the plan storage unit 16 is In the case of the first resource operation plan, information indicating that there is no imbalance avoidance time zone is transmitted to the retailer device 2 together with the operation plan as charge information.

The retailer device 2 settles the electricity charges for each consumer based on the charge information received from the power management device 1 . In other words, for a consumer who cooperated in avoiding imbalance during a time period, settlement is made according to the consumer imbalance unit price of the shortage imbalance or surplus imbalance in that time period. In this embodiment, the power management device 1 uses the consumer imbalance unit price to create an operation plan that avoids the imbalance when there is a merit for the consumer. This makes retailer device 2 more likely to avoid imbalance. Therefore, it is possible to suppress the loss caused by paying the imbalance fee when the shortage imbalance occurs or the loss caused by the difference between the purchase price and the purchase price of electricity when the surplus imbalance occurs. can be obtained.

Note that in FIG. 1, the power management device 1 is a device managed by an aggregator. If the retailer and the aggregator are the same, the retailer device 2 and the power management device 1 may be integrated. That is, the power management apparatus 1 shown in FIG. 1 may include a rate setting unit that sets a price signal based on the predicted value of the imbalance rate unit price based on the market price and the supply and demand plan. In this case, the imbalance information acquisition unit 13 acquires a price signal from the price setting unit. Also, the power management device 1 may be a device managed by a large-scale consumer such as a high-voltage consumer.

Next, the operation of this embodiment will be described. FIG. 2 is a flow chart showing an example of an operation plan creation processing procedure in the power management device 1 of the present embodiment. In the following, an example will be described in which a power resource is a storage battery and a charge/discharge plan for the storage battery is created as an operation plan. The plan creation unit 14 of the power management apparatus 1 sets the consumers for whom the plan is to be created (step S1). For example, the plan creation unit 14 may give each consumer an order in which an operation plan is created in advance, or may create an operation plan in order of customer identification information. In step S1, a customer for whom an operation plan is first created is set as a target customer for plan creation.

Next, the plan creation unit 14 of the power management apparatus 1 creates a first resource operation plan for a certain period of time using the prediction information, facility information, and hourly electricity rates (step S2). Specifically, the plan creating unit 14 corresponds to the forecast information received from the demand forecasting unit 20 and the rate plan of the customer whose plan is to be created included in the customer information stored in the customer information storage unit 11. A first resource operation plan is created for the customer for which the plan is to be created, using the electricity rate for each time zone and the facility information stored in the facility information storage unit 12, and stored in the plan storage unit 16. . Here, the fixed period is for one day on the next day as described above, and the first resource operation plan determines the charging/discharging amount of the storage battery, which is the power resource for 48 frames, with 30 minutes as one frame, for example.

For example, the plan creation unit 14 sets the cost borne by the consumer as an objective function, and determines the charge/discharge amount for each time period so as to minimize the objective function with facility information etc. as a constraint condition, thereby creating a charge/discharge plan. create. The objective function is, for example, the t-th time slot (t is an integer from 1 to 48) within a certain period, and the unit price of electricity in the t-th time slot in the customer's rate plan is C(t), Assuming that the demand curve is P(t) and the charge/discharge amount is B(t), the following equation (1) can be obtained. Let B(t) be positive for charging and negative for discharging. Although formula (1) assumes a consumer who does not own a power generation facility such as a photovoltaic power generation facility, for a consumer who owns a power generation facility, the objective function also considers the amount of power generated. The objective function is not limited to formula (1), and may include other fees and the like. Note that Σ in equation (1) indicates the sum of 1 to 48.
Objective function=Σ{(P(t)+B(t))×C(t)} (1)

The plan creation unit 14 calculates B(t) for each time slot so as to minimize the above objective function or so that the value of the above objective function is equal to or less than a predetermined value. As a result, for example, if a customer's rate plan is a plan in which the unit price of electricity is lower at night than during the daytime, the customer bears the burden of charging part of the electricity that the customer consumes during the daytime at night. can reduce the cost of In addition, although the example using an objective function is demonstrated here, you may create a charging/discharging plan according to the rule defined beforehand so that not only this but control called a peak shift and a peak cut may be performed. This rule is, for example, a rule to discharge the storage battery during a set time period when the electricity rate is high and to charge the storage battery during a set time period when the electricity rate is low, but is not limited to this example.

Next, the plan creation unit 14 of the power management device 1 creates a second resource operation plan for a certain period of time using the prediction information, facility information, hourly electricity rates, allowable conditions, and price signals (step S3). Specifically, the plan creating unit 14 corresponds to the forecast information received from the demand forecasting unit 20 and the rate plan of the customer whose plan is to be created included in the customer information stored in the customer information storage unit 11. using the electricity rate for each time period, the permissible condition indicated by the permissible information included in the consumer information stored in the consumer information storage unit 11, and the facility information stored in the facility information storage unit 12 , creates a second resource operation plan for the customer for which the plan is to be created, and stores it in the plan storage unit 16 .

The plan creation unit 14 creates the second resource operation plan by, for example, shifting the discharge time zone so that the discharge is carried out in the time zone where the consumer imbalance unit price of the shortest imbalance is the highest within a certain period. FIG. 3 is a diagram for explaining the second resource operation plan according to this embodiment. The upper part of FIG. 3 shows a contract unit price 51, which is the unit price of electricity charges for each time zone, and a consumer imbalance unit price 52 of shortage imbalance corresponding to the price plan of the consumer. In the upper part of FIG. 3, the horizontal axis is time and the vertical axis is unit price. The lower part of FIG. 3 shows a demand curve 53, which is the power consumption of the consumer by time period, and a charging time period 54 and a discharging time period 55 in the first resource operation plan. As shown in FIG. 3, in the first resource operation plan, the storage battery is charged during a time period when the unit price of electricity is low on the demand curve 53, and discharged during a time period when the unit price of electricity is high on the demand curve 53. This reduces the costs borne by consumers. On the other hand, in the example shown in FIG. 3, the consumer imbalance unit price for insufficient imbalance is highest in the time period from time tm. Therefore, the plan creation unit 14 creates the second resource operation plan by, for example, shifting the storage battery discharge time slot from the discharge time slot 55 in the first resource operation plan to the discharge time slot 56 after time tm. .

Here, when a change is made to avoid imbalance from the first resource operation plan, the amount of change in electric energy for avoiding imbalance in the consumer imbalance unit price (hereinafter referred to as the amount of change to avoid imbalance ) will be paid to the retailer. In the example shown in FIG. 3, since the discharge time period 55 and the discharge time period 56 overlap, the time period excluding the overlapping time period in the discharge time period 56 is the imbalance avoidance time period. The amount of electric power discharged during the avoidance time period is the imbalance avoidance change amount. In the example shown in FIG. 3, the total amount of power purchased by the consumer from the retailer during the time period when the contract unit price 51 is high does not change, so the electricity rate based on the rate plan is the same as the first resource operation plan. , the value obtained by multiplying the consumer imbalance unit price of the shortage imbalance by the imbalance avoidance change amount is the profit. Therefore, the cost borne by the consumer is the value obtained by subtracting the value obtained by multiplying the imbalance avoidance change amount by the consumer imbalance unit price of the shortage imbalance from the electricity rate based on the rate plan.

In the example shown in FIG. 3, the consumer imbalance unit price for insufficient imbalance was the highest in the time period when the contract unit price 51 was high. Sometimes the unit price is the highest. In such a case, if the storage battery is discharged during the period when the contract unit price 51 is low, it becomes impossible to discharge during the period when the contract unit price 51 is high. Therefore, the plan creation unit 14 changes the discharge time when the unit price of electricity in the time period during which discharge is scheduled to be performed in the first resource operation plan is lower than the consumer imbalance unit price of the shortage imbalance, If the unit price of electricity in the time period during which discharge was scheduled to be performed in the 1-resource operation plan is equal to or higher than the consumer imbalance unit price of insufficient imbalance, the discharge time is not changed. If the unit price of electricity in the time period during which discharge was scheduled to be performed in the first resource operation plan is greater than or equal to the consumer imbalance unit price of the shortage imbalance, the plan creation unit 14 may, for example, The second resource operation plan may be created so as to shift the discharge time to a time zone in which the contract unit price 51 is the same as the discharge time zone and the consumer imbalance unit price of the insufficient imbalance is the highest.

Further, in the first resource operation plan, if electric power is stored in the storage battery even after discharging in the discharge time slot 55, the discharge time slot is extended to create a second resource operation plan. good too.

As for the surplus imbalance, similarly, the plan creation unit 14 changes the charging time period to, for example, the time period when the unit price of the surplus imbalance is the highest among the time periods when the contract unit price 51 is low. A second resource operation plan can be created. In addition, when the imbalance charge unit price of the surplus imbalance is greater than 0 yen in the time slot in which the discharge is performed in the first resource operation plan, the plan creation unit 14 prevents the second resource from discharging in the time slot. Operation plans can be created.

Returning to the description of FIG. The plan determination unit 15 determines whether the value obtained by subtracting the cost corresponding to the second resource operation plan from the cost corresponding to the first resource operation plan (cost borne by the consumer) is greater than the threshold ( step S4). The threshold may be set to a value of 0 or higher. As described above, the plan storage unit 16 stores the first resource operation plan and the second resource operation plan together with the corresponding costs. , the determination of step S4 is performed.

In the case of Yes in step S4, the plan determination unit 15 selects the second resource operation plan (step S5), determines whether or not the calculation for all consumers is completed (step S7), is finished (step S7 Yes), the operation plan creation process is finished. Specifically, in step S<b>5 , the plan creation unit 14 determines to use the second resource operation plan as the customer's operation plan, and deletes the first resource operation plan from the plan storage unit 16 .

In the case of No in step S4, the plan determination unit 15 selects the first resource operation plan (step S6), and advances the process to step S7. Specifically, in step S<b>6 , the plan creation unit 14 determines to use the first resource operation plan as the customer's operation plan, and deletes the second resource operation plan from the plan storage unit 16 .

If No in step S7, the consumer for which the plan is created is changed (step S8), and the process from step S2 is repeated. Specifically, the plan determination unit 15 instructs the plan creation unit 14 to change the customer for which the plan is to be created, and the plan creation unit 14 changes the customer for which the plan is to be created.

Through the above processing, an operation plan for the power resource of the consumer is created. In the above example, an example of avoiding the imbalance by charging and discharging the storage battery was explained. you can go In this case, conditions under which the consumer can change the power consumption are defined as allowable information in the consumer information. For example, in the case of a customer who can shift the daytime power consumption up to a certain amount for a certain amount of time, this certain amount and the certain amount of time are included in the permissible information. As a result, the plan determination unit 15 can create the second resource operation plan that reflects imbalance avoidance within the range that the consumer can handle. In this case, since the power management device 1 may not be able to directly control the load of the consumer, the consumer may adjust the consumer facility 3 based on the second resource operation plan.

In addition, for example, in a consumer who has a storage battery, an operation schedule may be determined so that charging is started at the time when the unit price of electricity charges for each time period changes according to the rate plan contracted by each consumer. However, the plan creating unit 14 may create the second resource operation plan by delaying the time to start charging the storage battery within the range of satisfying the constraint conditions such as the capacity of the storage battery.

Note that the price signal may be given as a unit price of the hourly electricity rate. In this case, a price signal is set so that the total payment amount will not be greater for those who cooperate in avoiding imbalance than in those who do not cooperate in avoiding imbalance. For example, if the unit price stipulated in a normal contract is 25 yen during the daytime and 10 yen during the nighttime, setting a price signal of 40 yen during the daytime and 20 yen during the nighttime will result in a price signal. If adopted, the profit from peak shift will be greater than if the normal electricity rate is adopted, but the total electricity rate will increase compared to the case where the price signal is not adopted, so this setting is not used. Note that the definition of the price signal and the method of calculating the charge using the price signal are not limited to the above examples, and the plan creation unit 14 determines the definition of the price signal set by the retailer and the calculation of the charge using the price signal. The cost corresponding to the second resource operation plan may be calculated according to the calculation method.

FIG. 4 is a diagram illustrating an example of a second resource operation plan for avoiding surplus imbalance. In the example shown in FIG. 4, the consumer imbalance unit price 57 of the surplus imbalance is shown in the upper part. The lower part of FIG. 4 shows the first resource operation plan 58 and the second resource operation plan 59 . In this case, the plan determination unit 15 increases the power consumption of the consumer during the time period in which the consumer imbalance unit price 57 is set, and reduces the power consumption in another time period accordingly. As a result, the consumer can obtain a profit according to the consumer imbalance unit price of the surplus imbalance.

Next, the hardware configuration of the power management device 1 of this embodiment will be described. The power management apparatus 1 of the present embodiment functions as the power management apparatus 1 by executing a program, which is a computer program in which processing in the power management apparatus 1 is described, on the computer system. FIG. 5 is a diagram showing a configuration example of a computer system that implements the power management device 1 of this embodiment. As shown in FIG. 5, this computer system comprises a control section 101, an input section 102, a storage section 103, a display section 104, a communication section 105, and an output section 106, which are connected via a system bus 107. there is

In FIG. 5, the control unit 101 is a processor such as a CPU (Central Processing Unit), for example, and executes a program describing processing in the power management device 1 of the present embodiment. The input unit 102 is composed of, for example, a keyboard and a mouse, and is used by the user of the computer system to input various information. The storage unit 103 includes various memories such as RAM (Random Access Memory) and ROM (Read Only Memory) and storage devices such as a hard disk, and stores programs to be executed by the control unit 101 and necessary data obtained in the course of processing. store data, etc. The storage unit 103 is also used as a temporary storage area for programs. The display unit 104 includes a display, LCD (liquid crystal display panel), etc., and displays various screens to the user of the computer system. A communication unit 105 is a receiver and a transmitter that perform communication processing. The output unit 106 is a printer, speaker, or the like. Note that FIG. 5 is an example, and the configuration of the computer system is not limited to the example in FIG.

Here, an operation example of the computer system until the program of the present embodiment becomes executable will be described. In the computer system having the above configuration, for example, a computer program is stored in a storage unit from a CD-ROM or DVD-ROM set in a CD (Compact Disc)-ROM drive or a DVD (Digital Versatile Disc)-ROM drive (not shown). 103 installed. Then, when the program is executed, the program read from storage unit 103 is stored in the main storage area of storage unit 103 . In this state, control unit 101 executes processing as power management apparatus 1 of the present embodiment according to the program stored in storage unit 103 .

In the above description, a CD-ROM or DVD-ROM is used as a recording medium to provide a program describing the processing in the power management apparatus 1. However, the configuration of the computer system and the provided program are not limited to this. For example, a program provided by a transmission medium such as the Internet via the communication unit 105 may be used depending on the capacity of the computer.

The power management program of the present embodiment includes, for example, a step of acquiring a price signal in a computer system, a step of predicting the power demand of the consumer for a certain period using the actual value of the power demand of the consumer, is executed by the computer system. The power management program of the present embodiment further uses the contract unit price, which is the unit price of electricity for each time zone according to the price plan of the consumer, the price signal, and the result of forecasting the power demand, Calculate an index related to the profit when the consumer operates the power resource corresponding to the imbalance avoidance, and use the index to determine whether or not the consumer will perform the imbalance avoidance for a certain period of time. and causing the computer system to create an operation plan for the power resource of the consumer based on the result.

The plan creation unit 14, the plan determination unit 15, the control execution unit 17, and the demand prediction unit 20 shown in FIG. 1 are executed by the control unit 101 shown in FIG. It is realized by being executed. The storage unit 103 shown in FIG. 5 is also used to realize the plan creation unit 14, the plan determination unit 15, the control execution unit 17, and the demand prediction unit 20 shown in FIG. The consumer information storage unit 11, the facility information storage unit 12, the plan storage unit 16, and the actual demand value storage unit 19 shown in FIG. 1 are part of the storage unit 103 shown in FIG. The imbalance information acquisition unit 13, the actual value acquisition unit 18, and the plan information transmission unit 21 shown in FIG. 1 are realized by the communication unit 105 shown in FIG. Also, the power management apparatus 1 may be realized by a plurality of computer systems. For example, the power management device 1 may be realized by a cloud computer system.

As described above, in the present embodiment, the power management device 1 uses the price signal presented by the retailer to plan the operation of the power resource of the consumer so as to suppress the cost borne by the consumer. create. Therefore, it is possible to suppress the occurrence of imbalance while taking into consideration the merits of the consumer, thereby promoting the cooperation of the consumer to avoid the imbalance.

The configurations shown in the above embodiments are only examples, and can be combined with other known techniques, or can be combined with other embodiments, without departing from the scope of the invention. It is also possible to omit or change part of the configuration.

1 power management device, 2 retailer device, 3 consumer equipment, 4 power management system, 11 consumer information storage unit, 12 facility information storage unit, 13 imbalance information acquisition unit, 14 plan creation unit, 15 plan determination unit , 16 plan storage unit, 17 control execution unit, 18 actual value acquisition unit, 19 actual demand value storage unit, 20 demand forecast unit, 21 plan information transmission unit, 22 operation plan creation unit, 171 command value creation unit, 172 command value Transmission unit 201 Power generation amount prediction unit 202 Demand curve creation unit.

Claims (8)

Acquisition of imbalance information acquisition of a price signal that is information determined based on an imbalance charge unit price and that is information indicating the profit of the consumer when the imbalance is avoided by using the power resource of the consumer Department and
a demand prediction unit that predicts the power demand of the consumer for a certain period of time using the actual value of the power demand of the consumer;
Using the contract unit price, which is the unit price of the electricity rate for each time period according to the price plan of the consumer, the price signal, and the prediction result of the demand prediction unit, calculating an index related to profit when operating the power resource corresponding to avoidance, using the index to determine whether or not the consumer performs imbalance avoidance in the certain period of time; an operation plan creation unit that creates an operation plan for the power resource of the consumer based on
A power management device comprising: 2. The power management device according to claim 1, wherein said power resource includes a storage battery. The indicator is a difference in cost borne by the consumer between when the power resource corresponding to imbalance avoidance is not operated and when the power resource is operated corresponding to imbalance avoidance. 3. The power management device according to claim 1 or 2. The operation plan creation unit, based on the indicator, creates the operation plan in which the operation corresponding to the imbalance avoidance of the customer is reflected when the customer can obtain a profit by performing the imbalance avoidance. 4. The power management device according to any one of claims 1 to 3, wherein the power management device is created. a rate setting unit that determines the price signal based on the imbalance rate unit price;
5. The power management device according to any one of claims 1 to 4, comprising: a control execution unit that controls the power resource based on the operation plan;
6. The power management device according to any one of claims 1 to 5, comprising: A retailer device that determines a price signal that is information determined based on an imbalance charge unit price and that is information that indicates a consumer's profit when imbalance avoidance is performed using the consumer's power resource. and,
a power management device that creates an operation plan for the power resource of the consumer;
with
The power management device
an imbalance information acquisition unit that acquires the price signal from the retailer device;
a demand prediction unit that predicts the power demand of the consumer for a certain period of time using the actual value of the power demand of the consumer;
Using the contract unit price, which is the unit price of the electricity rate for each time period according to the price plan of the consumer, the price signal, and the prediction result of the demand prediction unit, calculating an index related to profit when operating the power resource corresponding to avoidance, using the index to determine whether or not the consumer performs imbalance avoidance in the certain period of time; an operation plan creation unit that creates an operation plan for the power resource of the consumer based on
A power management system comprising: to the computer system,
a step of obtaining a price signal, which is information determined based on the imbalance charge unit price and is information indicating the profit of the consumer when the imbalance is avoided by using the power resource of the consumer;
predicting the power demand of the consumer for a certain period of time using the actual value of the power demand of the consumer;
The consumer avoids the imbalance during the certain period of time by using the contract unit price, which is the unit price of the electricity rate for each time period according to the price plan of the consumer, the price signal, and the prediction result of the power demand. calculating an index related to profit when operating the power resource corresponding to , using the index to determine whether or not the consumer performs imbalance avoidance in the certain period of time, and based on the result of this determination a step of creating an operation plan for the power resource of the consumer by
A power management program characterized by executing

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