JP6246090B2 - REGIONAL ENERGY MANAGEMENT DEVICE, REGIONAL ENERGY MANAGEMENT SYSTEM, AND REGIONAL ENERGY MANAGEMENT METHOD - Google Patents

Description

  The present invention relates to a regional energy management apparatus, a regional energy management system, and a regional energy management method.

  In recent years, technologies that make effective use of electric power in the entire community, such as smart communities, have been studied. In such a community, in general, a local energy management system called CEMS (Community Energy Management System) manages the power supply amount and the electric power demand in the region. The use of power storage devices belonging to the community is being studied for the peak shift of electric power used in the community or effective use of solar power generation. The CEMS can control charging / discharging of the power storage devices belonging to the community based on the supply and demand situation.

  On the other hand, in recent years, with increasing awareness of disaster countermeasures, the number of consumers who own power storage devices is increasing. In normal times when no disaster occurs, it has also been proposed to use a power storage device owned by a customer for peak shift of electric power used by the customer in order to reduce energy costs within the customer.

  Patent Document 1 describes a technique for storing surplus power generated in a customer who owns a photovoltaic power generation facility and does not own a power storage device in a power storage device owned by another customer.

International Publication No. 2012/105105

  When surplus power is generated in a consumer who owns a photovoltaic power generation facility and does not own a power storage device, the surplus power can be effectively utilized if a power storage device outside the customer can be used. Although it is conceivable to use a power storage device belonging to the community as a power storage device outside the consumer, the surplus power generated may exceed the limit of the power storage amount of the power storage device belonging to the community. On the other hand, there may be a case where a power storage device owned by a consumer in the community has a power storage capacity. For this reason, it is desirable that a power storage device of a consumer in the community can be used to store surplus power generated by another consumer.

  Patent Document 1 discloses a technology that uses a power storage device of a consumer in a community to store surplus power generated by another consumer. However, in the technique described in Patent Document 1, if the consumer of the power storage device pays the usage fee of the power for storing surplus power, the customer who owns the power storage device may be disadvantageous in terms of cost. There is a problem that there is.

  The present invention has been made in view of the above, and obtains a regional energy management device capable of effectively utilizing surplus power generated in a region while suppressing the cost burden of a consumer who owns a power storage device. For the purpose.

To solve the above problems and achieve the object, the present invention provides control and load power generation amount prediction unit for predicting the load amount and power generation amount in the region of future periods, the power storage device customer owned based on the charge planning is demand IeTakashi discharge plan between future prior SL-life of the power storage device is received from the local control device which obtains a charge reserve capacity is available capacity of the charge amount in the power storage device, the charging margin And generating the charge / discharge plan in the region based on the load amount and the power generation amount predicted by the load power generation amount prediction unit, and storing the surplus power generated in the region based on the charge / discharge plan in the region If it is determined that the use of the power storage device is required for the purpose, a charge / discharge plan generation unit that generates a use plan for the power storage device and the consumer charge / discharge plan are received, and the use plan is sent to the local control device Send When a transmission / reception unit that receives a response from the local control device and the response indicating acceptance of the use plan are received, a power storage device charging contract is established between the consumer that owns the local control device And a billing processing unit for calculating a contract money to be paid to the consumer.

  Advantageous Effects of Invention According to the present invention, there is an effect that it is possible to effectively use surplus power generated in a region while suppressing the cost burden on a consumer who owns a power storage device.

FIG. 1 is a diagram showing a configuration example of a regional energy management system according to the present invention. FIG. 2 is a diagram illustrating a configuration example of the CEMS. FIG. 3 is a diagram illustrating a configuration example of the HEMS. FIG. 4 is a diagram illustrating a configuration example of a computer system in which CEMS is implemented. FIG. 5 is a flowchart illustrating an example of a processing procedure according to a storage device charging contract in HEMS. FIG. 6 is a diagram for explaining the remaining charge capacity. FIG. 7 is a diagram illustrating an example of remaining charge information. FIG. 8 is a flowchart illustrating an example of a processing procedure related to a power storage device charging contract in CEMS. FIG. 9 is a diagram illustrating an example of a usage plan. FIG. 10 is a flowchart illustrating an example of a charge / discharge control procedure in CEMS. FIG. 11 is a chart showing processing for concluding a power storage device charging contract.

  Embodiments of a regional energy management apparatus, a regional energy management system, and a regional energy management method according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment.
FIG. 1 is a diagram showing a configuration example of a regional energy management system according to the present invention. In FIG. 1, a voltage control device 1 is an LRT (Load Ratio Control Transformer: transformer with load tap changer) as a distribution transformer. A bus 2 is connected to the secondary side of the voltage control device 1. For example, two distribution lines 4-1 and 4-2 are connected to the bus 2 in parallel.

  The regional energy management system of the present embodiment is a system that manages power supply and demand in a region such as a smart community that manages power in the entire region. The measuring device 11 in FIG. 1 is installed at a location that is a boundary between a regional jurisdiction and an electric power company's jurisdiction, and measures power input to this region and power output from this region. The exchange of charges with the electric power company is performed based on the power input to the region and the power output from the region. In addition, billing to each customer in the area is managed in the area.

  One end of the distribution line 4-1 is connected to the bus 2 via the circuit breaker 3-1. One end of the distribution line 4-2 is connected to the bus 2 via the circuit breaker 3-2. The communication network 13 is, for example, the Internet, but may be a dedicated line, and the form of the communication network 13 is not particularly limited.

  The power storage devices 6 and 10 and the load 19 are connected to the distribution line 4-1. The load 19, the power storage device 6, and the control device 16 are facilities of the customer 22-3. Power storage device 6 is connected to control device 16. Charging / discharging of the power storage device 6 is controlled by the control device 16. The power storage device 10 is a power storage device owned by a region. Charging / discharging of the electrical storage device 10 is controlled by the CEMS 12, which is a regional energy management device that manages regional energy. The control device 16 is connected to the CEMS 12 via the communication network 13.

  The generators 8 and 9, the power storage device 7, the load 21 and the load 20 are connected to the distribution line 4-2. A generator 8, a load 21, and a consumer energy management device HEMS (Home Energy Management System) 18 that manages energy in the consumer are facilities of the consumer 22-1. The generator 8 and the load 21 are connected to the HEMS 18. The generator 9, the power storage device 7, and the load 20 are connected to the HEMS 17. The generator 9, the power storage device 7, the load 20, and the HEMS 17 are facilities of the customer 22-2. The HEMS 17 is connected to the CEMS 12 via the communication network 13.

  In addition, in FIG. 1, the load connected to the distribution lines 4-1 and 4-2, the electrical storage apparatus, and a part of generator are shown, and the consumers in an area are other than the three consumers shown in FIG. May also be present. Each consumer may have only a load and a power generator, may have only a load and a power storage device, or may have a load, a power generator, and a power storage device. Each power storage device may be connected to the HEMS, or may be connected to a control device that has a simplified function compared to the HEMS.

  FIG. 2 is a diagram illustrating a configuration example of the CEMS 12 of the present embodiment. The CEMS 12 includes a transmission / reception unit 31, a storage unit 32, a charge / discharge plan creation unit 33, a charge / discharge control unit 34, and a charging processing unit 35. In addition, in FIG. 2, the component for implementing the process concerning preparation of charging / discharging plan, charging / discharging control, and the electrical storage apparatus charging contract of this Embodiment is shown, and other general energy management regarding a region is shown. The components for realizing the functions are not shown.

  The charging / discharging plan creation unit 33 is configured to predict the load amount and power generation amount of the next day in the area, and the charge / discharge of the next day in the region based on the predicted load amount and power generation amount of the next day. A charge / discharge plan generation unit 332 for generating a plan; The charge / discharge control unit 34 includes a load power generation amount correction unit 341 that corrects the predicted load amount and power generation amount based on information on the day when charge / discharge control is performed, and a region based on the corrected load amount and power generation amount. A re-planning unit 342 for re-planning the charge / discharge plan, and a charge / discharge command calculating unit 343 for calculating a charge / discharge command value based on the charge / discharge plan after the re-planning.

  The storage unit 32 stores, as charge capacity data, charge capacity information indicating the remaining charge capacity of the power storage device received from the HEMS connected to the power storage device or the control device. Further, the storage unit 32 stores a customer charge plan indicated by the power storage device received from the HEMS or the control device connected to the power storage device as customer charge / discharge plan data. In addition, the storage unit 32 stores cost data, which is a parameter for calculating a cost related to an electric charge for each time zone for each electric power company, a cost related to the lifetime of each power storage device owned by the region, and the like. Electricity charges generally differ from time to time. Here, it is assumed that the electricity charges of each electric power company every 30 minutes are stored in the cost data. In addition, the storage unit 32 stores facility data that is information about each facility in the distribution system managed by the region. The storage unit 32 stores charge / discharge plan data that is the charge / discharge plan generated by the charge / discharge plan generation unit 332. The storage unit 32 stores charging data of each customer calculated by the charging processing unit 35. The storage unit 32 stores surplus power data 326 that is surplus power information received from the HEMS or control device connected to the generator.

  FIG. 3 is a diagram illustrating a configuration example of the HEMS 17. The HEMS 17 includes a transmission / reception unit 71, a storage unit 72, a charge / discharge plan creation unit 73, a charge / discharge control unit 74, and a surplus power calculation unit 75. In addition, in FIG. 3, the component for implementing the process concerning preparation of the charging / discharging plan in a consumer, calculation of charging / discharging control, surplus electric power, and the electrical storage apparatus charging contract of this Embodiment is shown, The components for realizing other general functions related to energy management are omitted. The HEM 18 has the same configuration as the HEMS 17. Here, the HEMS 17 and the HEMS 18 have a common configuration that can be connected to both the power storage device and the generator. The HEMS that is not connected to the generator does not have to include the constituent elements for calculating surplus power in FIG. 3, and the HEMS that is not connected to the power storage device is related to the charge / discharge plan and charge / discharge control in FIG. The component may not be provided.

  The charge / discharge plan creation unit 73 predicts the load amount and power generation amount of the next day of the consumer, and the charge / discharge of the customer next day based on the predicted load amount and power generation amount of the next day. A customer charge / discharge plan generation unit 732 that generates a customer charge / discharge plan that is a plan, and a remaining charge information generation unit 733 that generates remaining charge information that is information indicating the remaining charge capacity of the power storage device to be controlled. The remaining charge information is transmitted to the CEMS 12 once a day. Alternatively, when a request for transmission of remaining charge information is received from the CEMS 12, the remaining charge information may be transmitted.

  The charge / discharge control unit 74 corrects the predicted load amount and power generation amount based on the information on the day when charge / discharge control is performed, and the consumer based on the corrected load amount and power generation amount. A re-planning unit 742 that re-plans the charge / discharge plan and a charge / discharge command calculation unit 743 that calculates a charge / discharge command value based on the customer charge / discharge plan after the re-planning are provided.

  The storage unit 72 stores customer surplus power data calculated by the surplus power calculation unit 75. The storage unit 72 stores customer charge / discharge plan data that is a customer charge / discharge plan generated by the customer charge / discharge plan generation unit 732. The storage unit 72 stores the accounting data received from the CEMS 12.

  The control device 16 performs simplified charge / discharge control. That is, for example, the control device 16 does not have a function of generating a customer charge / discharge plan, charges in a first time zone set by the user, and discharges in a second time zone set by the user. For example, the first time zone is nighttime and the second time zone is daytime. When the control device 16 manages only the charging / discharging time zone, the control device 16 may transmit the initial value of the charged amount and the charging / discharging time zone to the CEMS 12 as remaining charge information. In this case, the CEMS 12 obtains the remaining charge capacity of the power storage device 6 controlled by the control device 16 based on the initial value of the power storage amount and the charging / discharging time zone.

  Specifically, the CEMS 12 is a computer system, that is, a computer. When the regional energy management program is executed on this computer system, the computer system functions as the CEMS 12. FIG. 4 is a diagram illustrating a configuration example of a computer system in which the CEMS of this embodiment is mounted. As shown in FIG. 4, the computer system includes a control unit 101, an input unit 102, a storage unit 103, a display unit 104, a communication unit 105, and an output unit 106, which are connected via a system bus 107. Yes.

  In FIG. 4, the control unit 101 is, for example, a CPU (Central Processing Unit) or the like, and executes the regional energy management program of the present embodiment. The input unit 102 includes, for example, a keyboard and a mouse, and is used by a computer system user to input various information. The storage unit 103 includes various memories such as a RAM (Random Access Memory) and a ROM (Read Only Memory) and a storage device such as a hard disk. The storage unit 103 is a program to be executed by the control unit 101 and necessary information obtained in the process. Memorize data, etc. The storage unit 103 is also used as a temporary storage area for programs. The display unit 104 is configured by an LCD (liquid crystal display panel) or the like, and displays various screens for the computer system user. The communication unit 105 performs communication processing. FIG. 4 is an example, and the configuration of the computer system is not limited to the example of FIG.

  Here, an operation example of the computer system until the local energy management program or the meter data management program according to the present embodiment becomes executable will be described. In the computer system having the above-described configuration, for example, a distribution system management program is stored from a CD (ROM) or a DVD (Digital Versatile Disc) -ROM drive (not shown) set in a CD-ROM or DVD-ROM. Installed in the unit 103. Then, the local energy management program read from the storage unit 103 is stored in a predetermined location in the storage unit 103 when the distribution system management program is executed. In this state, the control unit 101 executes the regional energy management process according to the present embodiment in accordance with the program stored in the storage unit 103.

  In the present embodiment, a CD-ROM or DVD-ROM is used as a recording medium to provide a program describing local energy management processing. However, the present invention is not limited to this, and the configuration of the computer system and the program to be provided Depending on the capacity, for example, a program provided by a transmission medium such as the Internet via the communication unit 105 may be used.

  The charging / discharging plan creation unit 33, the charging / discharging control unit 34, and the charging processing unit 35 in FIG. 2 are included in the control unit 101 in FIG. A storage unit 32 in FIG. 2 is a part of the storage unit 103 in FIG. The transmission / reception unit 31 in FIG. 2 is included in the communication unit 105 in FIG. 4.

  Further, the functional unit for realizing the operation of the HEMS 17 according to the present embodiment may be implemented as the computer system shown in FIG.

  Next, the power storage device charging contract of the present embodiment will be described. In the present embodiment, as described above, charging to each customer in the area is managed in the area. Here, it is assumed that the CEMS 12 manages the billing of the power usage fee of the consumers in the area. Any component and process may be used for the billing process of the electric energy usage fee, and illustration and description thereof are omitted here. It should be noted that charging of the electricity usage fee of the consumers in the area may be performed by an apparatus other than the CEMS 12.

  A consumer who owns both the generator and the power storage device can store the surplus power in the consumer when surplus power is generated by the generator. On the other hand, a consumer who has a generator and does not own a power storage device cannot store power in the consumer when surplus power is generated. In order to effectively utilize such surplus power in the region, it is conceivable to use the power storage device 10 owned by the region first. However, surplus power exceeding the power storage capacity of the power storage device 10 may be generated. In such a case, if there is a consumer who has sufficient charge capacity in the power storage device in the area, if the power storage device of the consumer can be utilized, the area can effectively use the local equipment without installing the power storage device. It is possible to make effective use of surplus power.

  On the other hand, a consumer having a power storage device is supplied with power from a distribution line in order to store surplus power of other consumers, and bears a usage fee according to the amount of electricity supplied. Become. The stored electric power can be used in the consumer, but considering the difference in the electricity charge depending on the time zone and the charge / discharge loss, the consumer who owns the electricity storage device may be disadvantageous in terms of charge. For example, a consumer having a power storage device can use the power supplied from the power storage device in the daytime by charging at night, which is generally cheap. However, considering that surplus power is mainly generated by solar power generation, a consumer who owns the power storage device is likely to be charged in the daytime when the charge is high.

  For this reason, in the present embodiment, when a consumer having a power storage device, that is, a HEMS or a control device has concluded a power storage device charging contract with a region, that is, CEMS 12, the consumer's power storage device is transferred to another consumer. It can be used to store surplus power generated in The customer who has a power storage device charging contract is paid a contract fee from the region. This contract fee is a fee determined at the time of contract regardless of whether or not the power storage device is actually used. The power storage device charging contract is made in a unit for a certain period in the future, for example, in the unit of one day on the next day, and the power storage device charging contract is made on the day before the day of use for power storage. Although the fixed period is not limited to one day, an example in which the fixed period in the future is the next day will be described below.

  The contract fee for the power storage device charging contract will be described. The contract fee is set so that the customer who has concluded the storage device charging contract does not become disadvantageous in terms of cost. For example, when the power charged in the power storage device is discharged and used, the amount of power that can be used is smaller than the amount of power charged due to charge / discharge loss. For this reason, the contract fee is set so that the charge / discharge loss can be compensated by the contract fee, that is, exceeds the cost borne by the customer due to the charge / discharge loss. For example, assuming that the amount of electricity charged is directly proportional to the cost caused to the customer due to charge / discharge loss, the contract fee is calculated as a value obtained by multiplying the amount of charge required for use by the CMES 12 by the unit price. Alternatively, the contract money may be set to a fixed value corresponding to the capacity of the power storage device regardless of the amount of charge required to be used, and simply set so that the contract money increases as the capacity of the power storage device increases. Considering that the life of the power storage device is shortened by increasing the number of times of charging / discharging, the contract fee may be set to compensate for the cost generated by shortening the life in addition to the charge / discharge loss. .

  In addition, even if the power storage device charging contract is concluded, the power storage device may not actually be used for charging surplus power. Therefore, the contract fee may be set as follows. The charging processing unit 35 sets Nr as the number of times that the power storage device charging contract has been concluded as Na, and Nr as the number of times that the power storage device has not been used for charging the surplus power, although the power storage device charging contract has been concluded. Based on Na, a use execution probability that is a probability of actual use when a power storage device charging contract is concluded is calculated. Then, the charging processing unit 35 obtains an expected value of the cost burden on the customer due to charge / discharge loss based on the use execution probability, and calculates the contract money so that the contract money exceeds the expected value.

  A power storage device of a consumer who has concluded a power storage device charging contract may not actually be used for storing surplus power on that day. Even in this case, the customer who has concluded the power storage device charging contract can receive the contract money. On the other hand, there is a demerit that the life of the power storage device is shortened by using the power storage device to store surplus power of other consumers. In addition, there is a demerit that when the customer needs to perform unscheduled power storage, the power storage device cannot be used in the time zone in which the power storage device charging contract is concluded. A consumer considers the above merits and demerits and determines whether or not to conclude a storage device charging contract. One customer places importance on the merit of receiving the contract money and, if there is enough charging capacity, concludes a power storage device charging contract as much as possible, and another customer places importance on not shortening the life of the power storage device. The consumer can determine whether or not to conclude a power storage device charging contract on an individual basis, such as reducing the frequency of concluding the power storage device charging contract. Note that the amount of contract money and the method for calculating the contract money are preliminarily presented to customers from the region.

  A consumer who may conclude a power storage device charging contract transmits information on the remaining charging capacity of the next day or a charging / discharging plan to the CEMS 12. The CEMS 12 selects a power storage device that is a candidate for use based on the prediction of surplus power on the next day, and notifies the HEMS or the control device that controls the power storage device of the time zone that requires use and the amount of power storage. Based on the notification from the CEMS 12, the consumer determines whether or not to conclude a power storage device charging contract. When a power storage device charging contract is concluded, the customer concludes a power storage device charging contract with the CEMS 12 via the HEMS or the control device. To be notified. Further, when the power storage device charging contract is concluded and the power storage device cannot be used on the same day, the customer who owns the power storage device has violated the contract. If the contract is violated, the customer who violates the contract pays a breach fee to the area, that is, the CMES 12 may impose a penalty on the customer who violates the contract. In the following, the violation fee is called a penalty.

  In addition, when receiving a notification from the CEMS 12, instead of determining whether or not the consumer makes a power storage device charging contract, the HEMS or the control device that controls the power storage device by setting a determination criterion in advance determines whether or not the power storage device charging contract is established. It may be determined whether or not to tie.

  Next, the operation of the present embodiment will be described in detail. FIG. 5 is a flowchart illustrating an example of a processing procedure according to a storage device charging contract in the HEMS 17. First, the load power generation amount prediction unit 731 predicts a customer load amount that is a load amount for each time zone within the customer on the next day (step S1). The time zone is, for example, 30 minutes. Next, the load power generation amount prediction unit 731 predicts a customer power generation amount that is a power generation amount of the generator 9 for each time zone in the customer on the next day (step S2). There are no particular restrictions on the method for predicting the load amount and the power generation amount, but the prediction is based on, for example, the weather forecast for the next day, the past load amount, the actual power generation amount, and the like.

  The customer charge / discharge plan generation unit 732 generates a customer charge / discharge plan that is a charge / discharge plan of the power storage device 7 based on the load amount and the power generation amount predicted by the load power generation amount prediction unit 731 (step S3). . The customer charge / discharge plan generation unit 732 stores the generated customer charge / discharge plan in the storage unit 72 as customer charge / discharge plan data.

  Next, the remaining charge capacity information generation unit 733 generates remaining charge capacity information of the power storage device 7 based on the customer charge / discharge plan (step S4). The remaining charge information generating unit 733 transmits the remaining charge information to the CEMS 12 via the transmission / reception unit 71 (step S5).

  FIG. 6 is a diagram for explaining the remaining charge capacity. As shown in FIG. 6, when the full charge of the power storage device is assumed to be SOC (State Of Charge) 100%, the period in which the SOC is less than TH% and neither charging nor discharging is performed, that is, a period with sufficient charging capacity, It is a time zone that can be used to store surplus power of consumers. TH is a threshold value for the SOC, and TH = 100 or TH = 100−α. During charging or discharging, charging / discharging control becomes complicated if charging is performed for charging and discharging of surplus power of other consumers in addition to charging / discharging within the consumer. It is a time zone that cannot be used to store surplus power. The remaining charge capacity is a value obtained by subtracting the SOC at each time from TH%. In the example of FIG. 6, three periods, a period in which the remaining charge capacity is A%, a period in which the remaining charge capacity is B%, and a period in which the remaining charge capacity is C% are used for storing the surplus power of other consumers. It is a possible period.

  FIG. 7 is a diagram illustrating an example of remaining charge information. As shown in FIG. 7, the remaining charge information includes a HEMS number, a power storage device usable time, and a usable remaining capacity. The available remaining capacity corresponds to the remaining charge capacity shown in FIG. 6, and may be a chargeable electric energy, or a value indicating a ratio with respect to the full charge capacity as a percentage like A% A in FIG. 6. There may be. When the available surplus capacity is SOC, the CEMS 12 holds the storage capacity of each power storage device as facility data, and calculates the amount of power that can be charged based on the storage capacity and the SOC. In addition, you may use the number which identifies a consumer instead of a HEMS number. In the present embodiment, once a day, the remaining capacity information for the next day is transmitted, and when there is a power storage device usable time several times a day, A plurality of sets of possible time and available remaining capacity are stored. FIG. 7 is an example of the remaining charge information, and the format of the remaining charge information is not limited to the example in FIG. 7, and any format can be used as long as it can indicate the power storage device usable time and usable remaining capacity. It may be in the form.

  Returning to the description of FIG. 5, after step S <b> 5, the remaining charge information generation unit 733 generates a response when receiving a storage device usage plan from the CEMS 12 via the transmission / reception unit 71 (step S <b> 6), and transmits the response to the CEMS 12. (Step S7). The use plan of the power storage device includes a time zone in which the power storage device is used and a range of the charge amount in the time zone. The response transmitted in step S7 stores information indicating whether the consumer accepts the usage plan. Information indicating whether or not to accept the usage plan is determined as follows, for example. The HEMS 17 informs the consumer of the use plan by displaying the use plan on a display device (not shown) of the HEMS 17 or transmitting the use plan from the HEMS 17 to the communication device of the consumer. Then, the consumer selects whether or not to accept the use plan by operating an input device (not shown) of the HEMS 17. Then, the HEMS 17 detects the selection result whether to accept the use plan based on the operation result of the input device, and determines whether to accept the use plan based on the selection result. Alternatively, the customer transmits information on whether or not to accept the use plan to the HEMS 17 using a communication device or the like, and the HEMS 17 determines whether or not to accept the use plan based on the received information.

  Or based on the conditions preset by the customer, the remaining charge information generating unit 733 may automatically determine whether to accept the received use plan. The preset condition is, for example, a condition that the use plan is within the range of the remaining charge information transmitted in step S5, or the use plan is within the range of the remaining charge information transmitted in step S5 and is set in advance. For example, a condition that the plan is used for a range of times may be considered.

  Here, it is assumed that a response for accepting the use plan is transmitted in step S7. When the CEMS 12 receives a response to accept the use plan from the HEMS 17, a power storage device charging contract is established between the customer who owns the HEMS 17 and the region, that is, the CEMS 12. The HEMS 17 receives the billing data from the CEMS 12 (Step S8). The billing data is information indicating the contract fee of the power storage device charging contract paid from the area to the consumer. The actual contract money may be paid on a monthly basis, but the contract money to be paid is determined at this point. That is, actually, even if the power storage device is not used on the day, the contract money is paid to the customer. When the HEMS 17 transmits a response that does not accept the use plan, the power storage device charging contract is not established.

  Further, in the case of a control device having a simplified function instead of HEMS, based on the customer charge / discharge plan set or input by the customer without carrying out steps S1 to S3 in FIG. Charge / discharge capacity information is generated and transmitted to the CEMS 12. Alternatively, the control device may transmit the customer charge / discharge plan itself. In this case, the CEMS 12 calculates the remaining capacity of the power storage device based on the received charge / discharge plan.

  FIG. 8 is a flowchart illustrating an example of a processing procedure according to the storage device charging contract in the CEMS 12. First, the load power generation amount prediction unit 331 predicts a customer load amount that is a load amount for each time zone in the area on the next day (step S11). The time zone is, for example, 30 minutes. Next, the load power generation amount prediction unit 331 predicts the power generation amount for each time zone in the area on the next day (step S12). There are no particular restrictions on the method for predicting the load amount and the power generation amount, but the prediction is made based on, for example, the next day's weather forecast, facility data, the past load amount, the actual power generation amount, and the like.

  And the transmission / reception part 31 receives charge remaining power information and surplus electric power information from a consumer (step S13). In the present embodiment, the reception from the HEMS or the control device actually owned by the consumer is simplified and expressed as being received from the consumer. Similarly, the transmission to the HEMS or the control device owned by the consumer is expressed as simplified and transmitted to the consumer. The transmission / reception unit 31 stores the remaining charge information and surplus power information received from the consumer in the storage unit 32. The charge / discharge plan generation unit 332 generates a charge / discharge plan in the region based on the predicted load amount and power generation amount in the region and the remaining charge power information and surplus power information received from the consumer (step S14).

  Specifically, the charge / discharge plan generating unit 332 obtains the remaining charge capacity of the power storage device controlled by the HEMS that is the transmission source of the remaining charge capacity information or the control device, based on the remaining charge capacity information. Moreover, the charge / discharge plan production | generation part 332 calculates | requires the surplus power of the generator controlled by HEMS of the transmission source of this surplus power information based on surplus power information. Then, the charging / discharging plan generation unit 332 uses the predicted load amount and power generation amount in the region and the obtained charging surplus power and surplus power, for example, by an optimal solution calculation algorithm to minimize the value of the evaluation function. A charge / discharge plan in the area is generated by calculating the discharge command. The evaluation function is a function indicating the cost. For example, the evaluation function includes a power purchase cost, a cost related to the life of a power storage device owned by the region, a natural discharge cost, and the like. The charge / discharge plan generation unit 332 calculates an evaluation function using the cost data stored in the storage unit 32. Further, when generating the charge / discharge plan, the power storage device connected to the HEMS or the control device of the surplus power information is handled in the same manner as the power storage device directly controlled by the CEMS 12. As a result, a charge / discharge plan that may include a case where a power storage device owned by a consumer and having a surplus charge capacity stores the surplus power generated in the region is generated. Note that power storage devices may be prioritized and power storage devices owned by the region may be used preferentially. The charge / discharge plan generation unit 332 stores the generated charge / discharge plan in the storage unit 32 as charge / discharge plan data.

  The charge / discharge plan generation unit 332 extracts a charge / discharge plan related to the power storage device that can be a target of the power storage device charge contract from the charge / discharge plan. The extracted plan becomes a usage plan that is notified to the customer who owns the power storage device. A power storage device that can be a target of a power storage device charging contract is a power storage device in a case where a power storage device owned by a customer is planned to be used to store surplus power in a region in a charge / discharge plan. is there. FIG. 9 is a diagram illustrating an example of a usage plan. As shown in FIG. 9, a HEMS number indicating a destination, a use time zone and a corresponding charge amount range, and a use time zone and a corresponding discharge amount range are included. In FIG. 9, the discharge is also included in the use plan, but the discharge may not be included in the use plan. When discharging is also included in the usage plan, the CEMS 12 generates a charging / discharging plan for a power storage device that is a candidate for concluding the power storage device charging contract so that the charge amount and the discharge amount are canceled within a certain time. For example, a charging / discharging plan of a power storage device that is a candidate for concluding a power storage device charging contract is generated so that the charged power amount returns to the original state even if it is discharged within 48 hours. When the transmission destination is not HEMS, the charging / discharging plan generation unit 332 that indicates the control device instead of the HEMS number transmits the usage plan of each power storage device to the customer who owns the power storage device (step S15).

  Next, in CEMS12, a response is received from a consumer (step S16). Here, it is assumed that a response indicating that the usage plan is accepted is received. When receiving the response indicating that the usage plan is accepted, the charging processing unit 35 determines that the CEMS 12 has established a storage device charging contract with the consumer. Then, the billing processing unit 35 generates billing data (step S17). Specifically, the billing processing unit 35 calculates a contract fee to be paid to the customer, generates data indicating the calculated contract fee as billing data, and stores it in the storage unit 32. The transmission / reception unit 31 transmits the billing data to the customer (step S18).

  When receiving a response not accepting the use plan from the consumer, the CEMS 12 creates a charge / discharge plan again under the condition that the power storage device of the consumer is not used for storing surplus power, for example. Send a usage plan to the device. The process in the case of receiving a response not accepting the usage plan from the consumer is not limited to this.

  Next, charge / discharge control will be described. FIG. 10 is a flowchart illustrating an example of a charge / discharge control procedure in the CEMS 12. On the day of the charge / discharge control, first, in the CEMS 12, the load power generation amount correction unit 341 corrects the load amount in the area (step S21). Next, the load power generation amount correction unit 341 corrects the power generation amount in the area (step S22). Specifically, for example, based on the weather forecast for the day, the load amount and the power generation amount used when creating the charge / discharge plan are corrected.

  The replanning unit 342 replans the charge / discharge plan using the corrected load amount and power generation amount (step S23). The charge / discharge command calculation unit 343 calculates a charge / discharge command corresponding to each power storage device based on the re-planned charge / discharge plan (step S24). At the time of re-planning, regarding the power storage device of the customer who has concluded the power storage device charging contract, the charging range and the discharging range notified in the usage plan are set as the constraint conditions. At this time, the re-planning may be performed so that the amount of charge to the power storage device owned by the consumer used for charging the surplus power is discharged within a certain period. This fixed period is, for example, 48 hours. The transmission / reception unit 31 transmits the charge / discharge command to the HEMS or the control device that controls the power storage device (step S25).

  Also in the HEMS 17, the load power generation amount correction unit 741 of the charge / discharge control unit 74 corrects the load amount and power generation amount in the consumer, and the re-planning unit 742 uses the corrected load amount and power generation amount to Re-plan the charge / discharge plan. At this time, if the power storage device charging contract is made, the re-planning unit 742 indicates the time designated as the use request time zone in the usage plan on the day subject to the power storage device charging contract. Re-plan on the condition that charging and discharging are performed in the range. Then, charge / discharge command calculation unit 743 calculates a charge / discharge command corresponding to power storage device 7 based on the re-planned charge / discharge plan.

  Here, a method of controlling the power storage device owned by a customer who has a power storage device charging contract with the area will be described. For example, it is assumed that the customer 22-2 who owns the HEMS 17 has concluded a power storage device charging contract with the region. Referring to FIG. 6 as an example, on the day, the power storage device 7 is controlled based on the charge / discharge command from the CEMS 12 in the usable time zone of FIG. 6, and the unusable time zone of FIG. The power storage device 7 is controlled based on the charge / discharge command.

  In the present embodiment, the charge / discharge plan of the power storage device that is a candidate for concluding the power storage device charge contract is generated so that the charge amount and the discharge amount are canceled within a certain time, but CEMS 12 Without specifically instructing the discharge, the consumer may perform control to discharge the amount of power charged by the power storage device charging contract within a predetermined time.

  FIG. 11 is a chart showing a process for concluding a power storage device charging contract according to the present embodiment. Here, it is assumed that HEMS # 1 of the 1st consumer who has an electrical storage apparatus, and HEMS # 2 of the 2nd consumer which has an electrical storage apparatus exist in an area. The HEMS # 1 notifies the CEMS 12 that 5 kWh can be used at 10-12 o'clock according to the remaining charge information (step S31). The HEMS # 2 notifies the CEMS 12 that 2 kWh can be used at 11-12 o'clock according to the remaining charge information (step S32).

  The CEMS 12 creates a charge / discharge plan using the remaining charge information from the HEMS # 1 and HEMS # 2 (step S33). The CEMS 12 requests the HEMS # 1 to use within the range of 1 kWh to 2 kWh by sending a usage plan at 10-11 (step S34). The CEMS 12 requests use in the range of 1 kWh to 2 kWh at 11-12 hours by transmitting a usage plan to the HEMS # 2 (step S35).

  When the HEMS # 1 and # 2 receive the usage plan, they transmit an OK response, that is, a response indicating that the usage plan is accepted to the CEMS 12 (steps S36 and S37). The CEMS 12 notifies the contract money to the HEMS # 1 and # 2 by transmitting the billing data (steps S38 and S39).

  Thereafter, on the day of charge / discharge control, the CEMS 12 transmits a charge command to the HEMS # 1 within the time zone of 10-11 o'clock (step S40). In the power storage device controlled by HEMS # 1, unscheduled charging is performed within the customer, and HEMS # 1 determines that charging is not possible (step S41). HEMS # 1 notifies CEMS12 that charging is impossible (step S42). The CEMS 12 notifies the HEMS # 1 of information indicating the penalty amount as billing data (step S43). Specifically, the billing processing unit 35 calculates a penalty amount, stores information indicating the penalty amount in the storage unit 32 as billing data, and notifies the billing data to the HEMS # 1 via the transmission / reception unit 31. .

  Further, the CEMS 12 transmits a charge command to the HEMS # 2 within the time zone of 11-12 hours (step S44). The HEMS # 2 transmits the charging command received from the CEMS 12 to the power storage device, and the power storage device performs charging as contracted (step S45). When charging, power is supplied from the distribution line to the consumer, and the consumer is charged for the amount of electricity used according to the amount of power supplied. Thereafter, HEMS # 2 transmits a discharge command to the power storage device, and the power storage device performs discharge (step S45). The discharged power can be used in the consumer.

  The billing data indicating the contract fee, penalty, etc., for example, is tabulated for each consumer in the unit of the period for collecting the normal electricity usage fee. Based on the collected results, payment of actual contract money to the consumer and collection of a penalty from the consumer are performed.

  Although not shown in FIG. 1, a consumer having a generator controlled by a control device having a simplified function instead of HEMS may be included. In this case, since the surplus power of the generator cannot be predicted by the consumer, the surplus power of these generators may be calculated by the CEMS 12. Moreover, CEMS12 may estimate surplus electric power, without using the surplus electric power transmitted from HEMS also about the generator which can predict surplus electric power by HEMS.

  In the present embodiment, the HEMS transmits the remaining charge information to the CEMS 12. However, the HEMS may transmit a consumer charge / discharge plan to the CEMS 12. The CMES 12 calculates the remaining charge capacity based on the received customer charge / discharge plan. Further, if the facility information such as the capacity of the power storage device is known, the remaining charge information is uniquely determined if the consumer charge / discharge plan is determined, and the remaining charge information is also a consumer in a broad sense. It can be considered as part of the charge / discharge plan. For this reason, the form in which the HEMS transmits the remaining charge information to the CMES 12 also corresponds to transmitting the consumer charge / discharge plan in a broad sense.

  Further, in the present embodiment, it has been described that the power storage device is controlled by the control device having the HEMS or the simplified function in the consumer. The HEMS that controls the power storage device and the control device having a simplified function can be considered as a local control device that controls the power storage device within the consumer.

  As described above, in the present embodiment, the HEMS or the control device of the consumer who owns the power storage device notifies the CEMS 12 of the remaining charge information, and the CMES 12 determines the use plan based on the remaining charge information, that is, the customer, that is, HEMS or Notify the control device. When a consumer accepts a usage plan, a power storage device charging contract is concluded between the consumer and the area, that is, CEMS, and the contract money is paid from the area to the consumer. For this reason, the cost burden of the consumer who owns an electrical storage apparatus can be suppressed, and the surplus electric power which generate | occur | produces in an area can be utilized effectively.

  As described above, the regional energy management device, the regional energy management system, and the regional energy management method according to the present invention provide energy management in a region where there are consumers who own solar power generation facilities and consumers who own power storage devices. Useful for.

  DESCRIPTION OF SYMBOLS 1 Voltage control apparatus, 2 bus | bath, 3-1, 3-2 circuit breaker, 4-1, 4-2 distribution line, 6, 7, 10 Power storage device, 8, 9 Generator, 11 Measuring device, 12 CEMS, 13 Communication network, 16 control device, 17, 18 HEMS, 19-21 load, 22-1-22-3 consumer, 31, 71 transmission / reception unit, 32, 72, 103 storage unit, 33, 73 charge / discharge plan creation unit, 34, 74 Charge / Discharge Control Unit, 35 Charge Processing Unit, 101 Control Unit, 102 Input Unit, 104 Display Unit, 105 Communication Unit, 106 Output Unit, 107 System Bus, 331 Load Power Generation Prediction Unit, 332 Charge / Discharge Plan Generation Unit , 341 Load power generation amount correction unit, 342 Replanning unit, 343 Charge / discharge command calculation unit, 731 Load power generation amount prediction unit, 732 Consumer charge / discharge plan generation unit, 733 Charging surplus power information generation unit , 741 Load power generation amount correction unit, 742 re-planning unit, 743 charge / discharge command calculation unit.

Claims (8)

A load power generation amount prediction unit for predicting the load amount and power generation amount in the region of future periods,
Based on the charge planning is demand IeTakashi discharge plan between future prior SL-life of the power storage device is received from the local control device for controlling the power storage device customer owned, with the charge amount of spare capacity in the electrical storage device A charge remaining capacity is obtained, a charge / discharge plan in a region is generated based on the charge remaining amount and the load amount and the power generation amount predicted by the load power generation amount prediction unit, and based on the charge / discharge plan in the region A charge / discharge plan generating unit that generates a use plan of the power storage device, when it is determined that the use of the power storage device is required for power storage of surplus power generated in the area,
A transmission / reception unit that receives the customer charge / discharge plan, transmits the use plan to the local control device, and receives a response from the local control device;
When the response indicating acceptance of the usage plan is received, it is determined that a power storage device charging contract has been established with the consumer who owns the local control device, and a contract fee to be paid to the consumer is calculated. A billing processing unit,
A regional energy management device comprising:   The regional energy management apparatus according to claim 1, wherein the contract money is an amount that exceeds a cost borne by the consumer due to charge / discharge loss.   The charging processing unit calculates an expected value of the cost borne by the consumer due to charge / discharge loss based on an execution probability indicating a probability that the power storage device is actually used after the power storage device charging contract is concluded. The regional energy management apparatus according to claim 1, wherein the contract money is calculated so that the contract money exceeds the expected value.   The charge / discharge plan generation unit generates the charge / discharge plan so as to discharge an amount of power charged in the power storage device within a predetermined period for storing surplus power generated in a region. Item 4. The regional energy management device according to item 1, 2 or 3. Based on the use plan, a charge / discharge control unit that generates a charge / discharge command for the power storage device owned by the customer with which the power storage device charge contract is established,
With
5. The regional energy management device according to claim 1, wherein the transmission / reception unit transmits the charge / discharge command to the local control device.   The charge / discharge control unit generates the charge / discharge command so as to discharge an amount of power charged to the power storage device within a predetermined period in order to store surplus power generated in a region. 5. The local energy management device according to 5. A power storage device owned by a consumer;
A local control device for controlling the power storage device;
An energy management device for managing energy in a region including the consumer;
With
The local control device generates a demand IeTakashi discharge plan a charge planning of future periods of the power storage device, transmits the demand IeTakashi discharge plan to the energy management device,
The energy management device includes:
A load power generation amount prediction unit for predicting the load amount and power generation amount in the region of the future of the period,
Based on the customer charge / discharge plan received from the local control device, a charging surplus that is a surplus of the charge amount in the power storage device is obtained, and the charge surplus and the load amount predicted by the load power generation amount prediction unit and When generating a charge / discharge plan in the area based on the power generation amount, and determining that the use of the power storage device is required for power storage of surplus power generated in the area based on the charge / discharge plan in the area, A charge / discharge plan generating unit for generating a use plan of the power storage device;
A transmission / reception unit that receives the customer charge / discharge plan, transmits the use plan to the local control device, and receives a response from the local control device;
When the response indicating acceptance of the usage plan is received, it is determined that a power storage device charging contract has been established with the consumer who owns the local control device, and a contract fee to be paid to the consumer is calculated. A billing processing unit,
A regional energy management system characterized by comprising: A load power generation amount prediction step of predicting the load amount and power generation amount in the region of future periods,
Based on the charge planning is demand IeTakashi discharge plan between future prior SL-life of the power storage device is received from the local control device for controlling the power storage device customer owned, with the charge amount of spare capacity in the electrical storage device A charge / discharge plan generation step for obtaining a charge capacity and generating a charge / discharge plan in a region based on the charge amount and the load amount and the power generation amount predicted in the load power generation amount prediction step;
When it is determined that the use of the power storage device is required to store surplus power generated in the region based on the charge / discharge plan in the region, the use plan of the power storage device is generated and the use plan is controlled by the local control A transmission step for transmitting to the device;
When a response indicating that the usage plan is accepted is received from the local control device, it is determined that a power storage device charging contract has been established with the customer who owns the local control device, and the customer is paid. A billing step to calculate the contract fee;
A regional energy management method characterized by including:

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