WO2017149724A1

WO2017149724A1 - Power management system

Info

Publication number: WO2017149724A1
Application number: PCT/JP2016/056589
Authority: WO
Inventors: 善朗大崎
Original assignee: 株式会社東芝
Priority date: 2016-03-03
Filing date: 2016-03-03
Publication date: 2017-09-08
Also published as: JP6602949B2; JPWO2017149724A1

Abstract

A power management system according to one embodiment of the present invention is provided with an acquisition unit and a control unit. The acquisition unit acquires a first power amount predicted to be consumed during a first time zone by a consumer home group that consumes power supplied from a power supply system. The control unit assigns, when the first power amount is larger than a second power amount supplied from the power supply system during the first time zone, a power amount to be discharged from a storage battery for each consumer home provided with the storage battery so that the total amount of the assigned power amount equals the difference between the first power amount and the second power amount, and executes control by outputting an instruction to discharge the assigned power amount from the storage battery to each of the consumer homes during the first time zone.

Description

Power management system

Embodiments of the present invention relate to a power management system.

In the conventional power system, the electric power corresponding to the demand was obtained by adjusting the power generation amount. For example, when a change occurs in demand, the power generation amount is controlled following the change. For this reason, a loss due to a difference in balance between supply and demand, and a loss due to inability to adjust the demand itself have occurred. In addition, there is a problem that efficient control cannot be performed between supply and demand.

In contrast, in recent years, a technology called smart grid has been proposed. The concept of this technology enables efficient control between supply and demand, which was difficult to achieve with conventional central control, by connecting the power generation equipment to the terminal power equipment via a network. can do.

Furthermore, it has been proposed to prepare a huge stationary power storage system in order to use surplus power generated during a time when supply exceeds demand in a time when demand exceeds supply.

JP 2010-128810 A

However, in the prior art, when a huge stationary power storage system is prepared, a site for installing the power storage system is required. For this reason, it is preferable to arrange a storage battery at the household level for each consumer and achieve the same amount by charging / discharging the storage battery in the same manner as in the stationary power storage system.

The power management system of the embodiment includes an acquisition unit and a control unit. The acquisition unit acquires a first power amount that is predicted to be consumed by a consumer group that consumes power supplied from the power supply system in a first time period. When the first power amount is larger than the second power amount supplied from the power supply system in the first time zone, the control unit determines that the total amount of allocated power is the first power amount. The amount of power discharged from the storage battery is assigned to each consumer in which the storage battery is installed so that the difference between the amount of power and the second amount of power is obtained, and the allocated amount of power is transferred from the storage battery to the consumer. Control is performed to output an instruction to discharge in the time period 1.

FIG. 1 is a diagram illustrating a configuration example of a power supply and demand management system according to an embodiment. Drawing 2 is a figure which illustrated the composition of the 1st consumer of an embodiment. FIG. 3 is a diagram illustrating a configuration of a supply and demand management server according to the embodiment. FIG. 4 is a diagram exemplifying a table structure that stores prediction information of power used for each time zone of each consumer stored in the consumer prediction information storage unit of the embodiment. FIG. 5 is a diagram illustrating the amount of power for each time period supplied to the consumer group from the power generation system of the embodiment. Drawing 6 is a figure showing the short-term prediction result of the amount of power used which the demand prediction acquisition part of an embodiment acquired based on the information storage part for demand prediction and the consumer prediction information storage part. FIG. 7 is a diagram illustrating a difference between the amount of power actually used by the consumer group of the embodiment and the amount of power supplied from the power generation system. FIG. 8 is a diagram illustrating, for each time zone, the priority order of storage batteries of consumers who perform discharging, set by the control unit of the embodiment. FIG. 9 is a diagram illustrating the transition of the amount of power used by the first consumer of the embodiment. Drawing 10 is a figure which illustrated transition of SOC of a storage battery provided in the 1st consumer of an embodiment. FIG. 11 is a diagram illustrating a transition of electric energy used for each consumer according to the embodiment. Drawing 12 is a figure which illustrated transition of SOC of a storage battery provided for every consumer of an embodiment. Drawing 13 is a figure which illustrated transmission and reception at the time of performing a discharge plan of a storage battery between the demand-and-supply management server of an embodiment, and the 1st consumer. FIG. 14 is a diagram illustrating the movement of electric power used by the first consumer when the storage battery is charged and discharged according to the charging and discharging plan of the embodiment. FIG. 15 is a flowchart illustrating overall processing of the supply and demand management server according to the embodiment.

In this embodiment, an example in which the power management system is applied to a power supply and demand management system will be described, but it may be used for other systems.

FIG. 1 is a diagram illustrating a configuration example of a power supply and demand management system according to an embodiment. In the example shown in FIG. 1, the entire power system at the time of power liberalization is shown.

As shown in FIG. 1, the power supply and demand management system includes a supply and demand management server 100, a meter management server 103, a power generation system 104, a customer group 101 provided with a storage battery, and a customer group 102 provided with no storage battery. And.

As shown in FIG. 1, power is supplied from the power generation system 104 to the

customer groups

101 and 102 via the power system network 152.

Demand power of the customer group 102 without a storage battery is provided for each smart meter 112_1, 112_2,..., 112_m (hereinafter referred to as smart meter 112) provided for each of the consumers 102_1, 102_2,. It is measured.

Demand power of the customer group 101 provided with the storage battery is measured for each smart meter 111_1, 111_2, 111_3,..., 111_n (hereinafter referred to as smart meter 111) provided in each of the consumer group 101. Yes.

The power measured by the smart meter 112 and the smart meter 111 is notified to the meter management server 103 of the power distribution company via the AMI network (smart meter network) 153 every 30 minutes.

A general power retailer can acquire data of the smart meters 111 and 112 measured every 30 minutes from the power distribution company via the network 154 between the power system companies. In this embodiment, data collected by the meter management server 103 of the power distribution company is transmitted to the supply / demand management server 100 of the retailer via the network 154 between the power system companies.

By the way, the current rules require 30 minutes to obtain the latest data. Considering the notification every 30 minutes from the smart meter, it is possible to obtain measurement data up to 60 minutes ago.

Furthermore, the consumer group 101 is provided for each of the first consumer 101_1, the second consumer 101_2, the third consumer 101_3,..., The nth consumer 101_n (n is a natural number). For each storage battery 121_1, 121_2, 121_3,..., 121_n (hereinafter referred to as storage battery 121), detailed information (for example, SOC) of the storage battery 121 is provided through a public network (for example, the Internet communication network) 151 for retail business. Notification to the person's supply and demand management server 100.

Therefore, the supply and demand management server 100 according to the present embodiment performs processing based on the measurement data by the smart meters 111 and 112 of the

customer groups

101 and 102 and the detailed data regarding the storage battery 121 of the consumer group 101 provided with the storage battery. It can be performed. For example, the supply and demand management server 100 of the present embodiment performs charge / discharge control of the storage battery 121 provided in the consumer group 101.

The power retailer's supply and demand management server 100 communicates with the power generation company having the power generation system 104 via the power system company's network 154 to procure power to be supplied to the consumer. I do. Furthermore, the power retailer's supply and demand management server 100 receives measurement data from the meter management server 103 of the power distribution company and detailed information regarding the storage battery 121 of the consumer group 101 via the public network 151. Then, the electricity retailer's supply and demand management server 100 uses the amount of power supplied from the power generation system 104 and the amount of power used by the

customer groups

101 and 102 based on the received measurement data and detailed information about the storage battery 121. Based on the prediction, the charge / discharge control of the storage battery 121 of the consumer group 101 is performed to realize the same amount control simultaneously.

FIG. 2 is a diagram illustrating the configuration of the first consumer 101_1. As shown in FIG. 2, a load 204 and a storage battery system 200 are connected via a distribution line 201. The first customer 101_1 is, for example, equipment installed in a home or company site. In the example illustrated in FIG. 2, the configuration of the first consumer 101_1 will be described. However, the second customer 101_2,...

The first customer 101_1 of the present embodiment is supplied with power from the power generation system 104 via the power system network 152. The power output from the power generation system 104 is supplied to the storage battery system 200 and the load 204 via the distribution line 201.

The smart meter 111_1 measures the power supplied from the power generation system 104. Furthermore, the smart meter 111_1 measures the electric power used in the first consumer 101_1, and grasps the electricity usage status in the first consumer 101_1 through HEMS (Home Energy Management System) or the like. Then, the smart meter 111_1 uses the power measurement result of the first consumer 101_1 as measurement data (including the power usage state) via the AMI network (smart meter network) 153, and the meter management server of the power distribution company 103 is notified every 30 minutes.

The load 204 may be any device that consumes electric power such as home appliances provided in the premises of homes and companies.

The power sensor 202 measures the power between the storage battery 121_1 and the load 204. The power sensor 202 outputs the power measurement result to the control unit 211.

The storage battery system 200 includes a control unit 211, a storage battery 121_1, a PCS 213, and a communication unit 212.

The PCS 213 performs control to mutually convert DC power of the storage battery 121_1 and AC power flowing through the distribution line 201.

And the electric power discharged from the storage battery 121_1 is converted into AC power by the PCS 213, and then supplied to the load 204 and the like.

The communication unit 212 transmits and receives information to and from other communication devices connected via the public network 151. For example, the communication unit 212 transmits detailed information regarding the storage battery system 200 to the supply and demand management server 100. The detailed information is information necessary for charging / discharging the storage battery 121_1 and includes the SOC of the storage battery 121_1.

The control unit 211 controls the entire storage battery system 200. For example, the control unit 211 controls charging / discharging of the storage battery 121_1 based on the charge / discharge control instruction (charge / discharge plan) received by the communication unit 212 from the supply and demand management server 100.

When the storage battery 121_1 is charged, the smart meter 111_1 uses the amount of power consumed by the load 204 in the first consumer 101_1 to the amount of power consumed by the storage battery 121_1 as the first consumer. Measured as the amount of power used in 101_1. Then, the smart meter 111_1 transmits the measurement result to the meter management server 103.

Next, the supply and demand management server 100 will be described. FIG. 3 is a diagram illustrating the configuration of the supply and demand management server 100 of the present embodiment. As shown in FIG. 3, the supply and demand management server 100 includes a demand prediction information storage unit 301, a meter information storage unit 302, a consumer-specific storage information storage unit 303, a customer prediction information storage unit 304, and a communication An I / F 305, a demand prediction acquisition unit 306, and a main processing unit 307 are provided.

The communication I / F 305 is a communication I / F for connecting to the public network 151.

The demand prediction information storage unit 301 stores information such as weather, temperature, and season necessary for predicting the power used by the consumer. The information is acquired from a server or the like that provides the weather or the like, but may be acquired in any manner.

The meter information storage unit 302 stores measurement data obtained by the smart meters 111 and 112 provided to the consumers of the

customer groups

101 and 102, respectively.

The power storage information storage unit 303 for each consumer stores detailed information related to the storage battery system 200 provided in each consumer group 101. As detailed information, SOC of the storage battery 121 is contained, for example. The power storage information storage unit 303 for each consumer is updated at every interval received by a reception processing unit 311 (described later). In this embodiment, the reception processing unit 311 receives and updates every 1 to 5 minutes for each customer, but the reception interval is not limited.

The customer prediction information storage unit 304 stores, for each customer group 101 in which the storage battery 121 is installed, power prediction information used for each time period. FIG. 4 is a diagram exemplifying a table structure for storing prediction information of power used for each customer time zone, which is stored in the customer prediction information storage unit 304. As shown in FIG. 4, the customer prediction information storage unit 304 stores power prediction information for each customer's time zone (for example, time zone A to time zone G). The power forecast information includes a demand forecast value (KWh) (Pw) indicating the amount of power usage predicted for each consumer's time zone, forecast accuracy information (Cr), and demand forecast value (Pw). And the judgment value (Vl) multiplied by the prediction accuracy information (Cr). The prediction accuracy information (Cr) is a value indicating the probability (accuracy) that the demand prediction value (Pw) of the customer in the time period is a correct prediction. For example, the prediction accuracy information (Cr) is set to a high value for consumers who perform regular life and activities.

In this embodiment, the time zone A is 0 to 6 o'clock, the time zone B is 6 to 9 o'clock, the time zone C is 9 o'clock to 12 o'clock, the time zone D is 12 o'clock to 15 o'clock, and the time zone E is 15 o'clock. The case where the time zone is set to 18:00, the time zone F is set to 18:00 to 21:00, and the time zone G is set to 21:00 to 24:00 will be described. Divisions may be provided in units or in units of 30 minutes. In the present embodiment, by performing processing for each time zone, it is possible to make a determination according to the basic pattern of life.

In addition, the power prediction information set for each consumer and time zone shown in the present embodiment is provided for each classification. In the example shown in FIG. 4, the table is for sunny, Monday, and weekdays, and is provided for each weather, temperature, day of the week, and whether or not it is a holiday. In other words, in this embodiment, the customer selects an appropriate table from the tables provided for each environmental state that affects the life pattern such as weather, temperature, day of the week, or weekday / holiday, and is used by the customer. By predicting the power to be used, the validity of the accuracy can be increased. Thereby, prediction with higher accuracy becomes possible.

In the example shown in FIG. 4, prediction information from the first consumer to the n-th consumer is stored, but the consumer prediction information storage unit 304 is stored in the consumer group 101 in which the storage battery 121 is provided. You may memorize | store prediction information about all the consumers contained in the consumer group 102 in which the storage battery is not provided other than all the consumers contained.

Returning to FIG. 3, the main processing unit 307 includes a reception processing unit 311, a transmission processing unit 312, and a control unit 313, and performs processing of the entire supply and demand management server 100. The main processing unit 307 performs basic processing for supply and demand management.

The reception processing unit 311 receives various information from a communication device connected via the public network 151 or the network 154 between power system operators. For example, the reception processing unit 311 receives measurement data from the meter management server 103 by the smart meters 111 and 112 provided for each consumer of the

consumer groups

101 and 102. Then, the reception processing unit 311 stores the received measurement data in the meter information storage unit 302.

As another example, the reception processing unit 311 has detailed information on the storage battery system 200 provided in each consumer group 101 that consumes power supplied from the power generation system 104 (power supply system). Receive.

The demand prediction acquisition unit 306 acquires the amount of power that is predicted to be consumed by each consumer of the

consumer groups

101 and 102 that consumes the power supplied from the power generation system 104 (power supply system). To do.

In the present embodiment, the demand prediction acquisition unit 306 selects a table corresponding to the weather or the like stored in the customer prediction information storage unit 304 from the customer prediction information storage unit 304. And the demand prediction acquisition part 306 acquires the prediction information of the electric power for every time slot | zone of each consumer from the table selected from the selected consumer prediction information storage part 304. FIG. In this embodiment, the demand prediction acquisition unit 306 acquires from the table. However, the demand prediction acquisition unit 306 may acquire it from other devices, and may use the power consumption for each consumer using various parameters such as SOC. The power prediction information may be calculated by simulating. In addition, the forecast may be calculated from environmental information such as the demand actual value of the customer and the temperature that fluctuate from time to time, from the long-term forecast to the short-term forecast one hour ahead, and the latest forecast value may always be calculated. .

Thus, the demand prediction acquisition unit 306 makes a demand prediction of the amount of power used by each of all the consumers, and makes a total demand prediction of the amount of power used by all of the

consumer groups

101 and 102.

Based on the prediction information acquired by the demand prediction acquisition unit 306, the control unit 313 makes a charge / discharge plan for the storage batteries 121 arranged in each of the consumer groups 101, and instructs the charge / discharge control of the storage battery 121 according to the plan. To do. The instruction is transmitted by the transmission processing unit 312 via the communication I / F 305.

The control unit 313 compares the power amount for each time zone supplied from the power generation system 104 with the total value of the power amount consumed by each customer group in the time zone acquired by the demand prediction acquisition unit 306. And the control part 313 performs charging / discharging control of the storage battery 121 provided in the consumer group 101 so that it may become simultaneous same amount control according to a comparison result.

FIG. 5 is a diagram showing the amount of electric power for each time period supplied from the power generation system 104 to the

customer groups

101 and 102. In the example shown in FIG. 5, the amount of power 501 procured from the power generation company one day ago is shown as the amount of power supplied from the power generation system 104 to the

consumer groups

101 and 102. The procured power amount 501 is calculated and purchased based on the predicted value of the total demand amount of the

customer groups

101 and 102 to which power is supplied from the power generation system 104.

However, the

consumer groups

101 and 102 do not always use electric power as expected in the long term.

FIG. 6 is a diagram showing a short-term prediction result of the power usage amount acquired by the demand prediction acquisition unit 306 based on the demand prediction information storage unit 301 and the customer prediction information storage unit 304. In the example shown in FIG. 6, the dotted line indicates the procured electric energy 501 shown in FIG. 5. As a result of taking into consideration the latest temperature, the change in the latest demand record, and the like, the shift in the electric energy occurs because the short-term prediction is more accurate than the long-term prediction.

And the surplus electric energy which has arisen when the electric energy 601 is lower than the procured electric energy as a result of the short-term prediction is shown. The amount of electric power 602 indicates the amount of insufficient electric power that is generated when the amount of electric power that has been procured is exceeded as a result of the short-term prediction.

By the way, although it depends on the method of operation, it is possible to make adjustments in the short-term market by procuring additional power shortly by making a short-term forecast one hour ago and selling surplus power to others. . The short-term market is scheduled to start operation as a new system for electricity liberalization, and will become a price market according to supply and demand. Usually, the most recent trade is disadvantageous in price compared to planned trade, but if these measures are not taken, the current rules will confiscate surplus power at no charge and shortage will be charged as penalty power at a later date. It will be. For this reason, efficient adjustment is required, including adjustment in the short-term market.

On the other hand, the supply and demand management server 100 of the present embodiment performs control for charging the surplus power generated as a result of the short-term prediction to the storage battery 121 provided in the customer group 101, and the shortage resulting from the short-term prediction. Control to discharge electric power from the storage battery 121 provided in the consumer group 101 is performed.

Thus, the same amount can be achieved by performing charge / discharge control of the storage battery 121 provided in the consumer group 101 without using a short-term market and without providing a huge stationary power storage system.

Furthermore, when using the electric power discharged from the storage battery 121 provided in the consumer group 101, unlike the stationary power storage system, supplying the electric power to other consumers is related to noise or the like. Is not preferable.

Therefore, the supply and demand management server 100 according to the present embodiment adjusts the power discharged from the storage battery 121 in consideration of the amount of power expected to be consumed by the consumer.

FIG. 7 is a diagram showing the difference between the amount of power actually used by the

customer groups

101 and 102 and the amount of power supplied from the power generation system 104. In the example shown in FIG. 7, a thick line 703 indicates the amount of power actually used. And the surplus electric energy 701 further generated from the short-term prediction shown in FIG. 6 and the insufficient electric energy 702 further generated from the short-term prediction are shown. Similarly, the surplus power amount 701 and the shortage power amount 702 are also adjusted by charge / discharge control of the storage battery 121 by the supply and demand management server 100.

The control unit 313 of the supply and demand management server 100 according to the present embodiment performs discharge based on the prediction information for each consumer of the consumer group 101 provided with the storage battery 121 stored in the consumer prediction information storage unit 304. The storage battery 121 is selected.

The control unit 313 of the present embodiment selects a table for acquiring prediction information from the table stored in the customer prediction information storage unit 304 based on the weather and the like, and then selects the table for each time zone from the selected table. In addition, the priority order of the storage batteries 121 for discharging is specified. The control unit 313 of the present embodiment sets priorities in descending order of the determination value among the consumers 101 provided with the storage battery 121 for each time period stored in the selected table. In the example illustrated in FIG. 4, for example, in the time zone D, the priority order is set in the order of the first consumer, the third consumer, and the second consumer with the highest determination value (Vl).

FIG. 8 is a diagram illustrating the priority order of the storage battery 121 of the consumer that performs the discharge, set by the control unit 313, for each time zone. Based on the table shown in FIG. 4, by setting the priority order as shown in FIG. 8, the power of the storage battery 121 is used in order from the consumer who is judged to have a large amount of power usage. Control is performed. In the example illustrated in FIG. 4, in the time zone D, the control is performed such that the discharge is performed in the order of the first consumer, the third consumer, and the second consumer. In the present embodiment, control is performed so as to preferentially discharge a consumer who uses a large amount of power and uses the power with high accuracy. In the example shown in FIG. 8, only the first consumer, the second consumer, and the third consumer are shown, but the priority order is set for other consumers based on the determination.

Based on the short-term prediction result or the like, the control unit 313 compares the amount of power supplied from the power generation system 104 in a predetermined time zone (any one of the time zones A to G) with respect to the customer group 101. , 102 is discharged from the storage battery 121 for each consumer in which the storage battery 121 is installed so that the total amount of allocated power is the difference between the supplied power amount and the used power amount. Electric power is allocated, and control is performed to output an instruction to discharge the allocated electric power from the storage battery 121 to the consumer in a predetermined time zone.

At that time, the control unit 313 determines the amount of electric power to be discharged for each consumer in which the storage battery 121 is installed according to the priority order set based on the prediction information in the table stored in the customer prediction information storage unit 304. assign. And in the said predetermined time, the storage battery 121 of the consumer to which electric energy was preferentially allocated will discharge high electric energy compared with the storage battery 121 of the consumer with a low priority. That is, even if the amount of power discharged to a consumer with low power consumption is set high, it is difficult for other consumers to use. Therefore, in the present embodiment, the amount of power to be preferentially discharged is assigned to a consumer who is likely to use a high amount of power.

As a result, in a consumer with a large amount of power to be used, the storage battery 121 of the consumer discharges, so that the power supply and demand management system as a whole has the same effect as saving the power used by the consumer. In other words, it can be said that it was possible to produce a negative wattage. Furthermore, when performing real-time charge / discharge control, by setting a target value for the amount of electric power to be discharged, it is possible to manage as a local process in the consumer according to the accuracy.

Further, the control unit 313 is installed in the customer group 101 in a time zone in which a higher amount of power is supplied from the power generation system 104 than the predicted total demand of the

customer groups

101 and 102 based on a short-term prediction result or the like. Control is performed so that the storage battery 121 is charged. The control unit 313 of the present embodiment may perform control so as to preferentially store power to the storage battery 121 of a customer with high priority for discharging after the time period.

The transmission processing unit 312 performs control to transmit the charge / discharge instruction generated by the control unit 313 to the customer provided with the storage battery 121 that performs charge / discharge control via the communication I / F 305.

FIG. 9 is a diagram illustrating the transition of the electric energy used by the first consumer 101_1. The amount of power 901 used by the first consumer 101_1 varies with the amount of power used for each time period. Similarly to the time zone described above, FIG. 9 also shows that the time zone A is 0 to 6 o'clock, the time zone B is 6 o'clock to 9 o'clock, the time zone C is 9 o'clock to 12 o'clock, and the time zone D is 12 o'clock to 15 o'clock The time zone E is from 15:00 to 18:00, the time zone F is from 18:00 to 21:00, and the time zone G is from 21:00 to 24:00.

FIG. 10 is a diagram illustrating the transition of the SOC of the storage battery 121 provided in the first consumer 101_1. In the SOC 1001 shown in FIG. 10, it increases in time zones A and G and decreases in time zones B to F. As shown in FIG. 6, since surplus power is generated in time zones A and G, charging control is performed in accordance with an instruction from control unit 313, and insufficient power is generated in time zones B to F. This is because discharge control was performed in accordance with instructions from 313. Simultaneous and same amount control can be realized by the charge / discharge control.

Further, in the present embodiment, in order to charge at night (time zones A and G) where the power price is assumed to be cheap, a power amount larger than the demand forecast for the time zone is purchased from the power generation system 104. Anyway. As a result, surplus power is generated in the time zones A and G, so that the storage battery 121 can be charged.

Furthermore, when the storage unit 121 installed in a consumer performs power storage in a time zone in which power higher than the predicted total demand is supplied, the control unit 313 includes the SOC of the storage battery 121 and a preset power storage target value. Based on the difference, the storage battery 121 may be controlled to store electricity. The preset power storage target value is set based on the amount of power used after the time period, the priority order, and the like, and is set according to the embodiment. To do.

FIG. 11 is a diagram showing the transition of the electric energy used for each consumer. As shown in FIG. 11, the transition of the electric energy used for each consumer is different. In the time zone D, the amount of power 1101 used by the first consumer 101_1 is the highest. Then, the power amount 1103 used by the third consumer 101_3 is the next highest, and the power amount 1102 used by the second consumer 101_2 is the lowest. Therefore, in the time zone D, as shown in FIG. 8, the priority order is set in the order of the first consumer 101_1, the third consumer 101_3, and the second consumer 101_2.

And as shown in FIG.6 and FIG.7, in the time slot | zone D, the electric energy used by the

consumer groups

101 and 102 shall be larger than the electric energy supplied from the power generation system 104. . As described above, it is predicted that the power supply and demand plan greatly deviates in the time zone D, and the power supplied from the power generation system 104 is insufficient.

Therefore, the control unit 313 performs discharge control of the storage battery 121 for each consumer according to the priority order.

And the control part 313 needs to set the target value of SOC of the storage battery 121 by discharge control, when instruct | indicating the discharge control of the storage battery 121 with respect to a consumer according to a priority order for every consumer. In the present embodiment, when the control unit 313 instructs the consumer to use electric power, the demand prediction associated with the consumer in the time zone stored in the consumer prediction information storage unit 304 is stored. A discharge target value is set based on the value (Pw). For example, the control unit 313 sets a power amount obtained by multiplying the demand prediction value by “0.8” as the discharge target value. Then, control unit 313 sets the SOC target value so as to discharge the amount of power indicated by the discharge target value. Note that multiplication by “0.8” is shown as an example, and a numerical value other than “0.8” may be multiplied, or other calculations may be performed.

FIG. 12 is a diagram illustrating the transition of the SOC of the storage battery 121 provided for each consumer. As shown in FIG. 12, in time zone D, it can be confirmed that the SOC 1202 of the first consumer 101_1, the SOC 1204 of the third consumer 101_3, and the SOC 1203 of the second consumer 101_2 decrease in this order. .

In the present embodiment, since the priority order of the first consumer 101_1 is high from time slot B to time slot E, the control unit 313 prioritizes the storage battery 121 of the first consumer 101_1 in time slot A. Control to charge. As a result, the storage battery 121 of the first consumer 101_1 has a higher SOC at the time 1201 when the time zone A ends compared to the second consumer 101_2 and the third consumer 101_3.

In the example shown in FIG. 12, short-term forecast or the amount of power actually used and the amount of power predicted one day in advance are used to calculate the shortage power as the storage battery 121 of the first consumer to the third consumer. The example which twists out as a negative watt was demonstrated using. When it is actually set as the insufficient power L, the control unit 313 makes a charge / discharge plan based on the priority order from the amount of power predicted to be used in the time zone D of the customer group 101 provided with the storage battery 121, Control is performed so that the storage battery 121 of the consumer is discharged from the top of the priority order until the total satisfies the insufficient power L.

Further, in the example shown in FIG. 12, the example of adjusting the insufficient power for the time zone D has been described, but supply and demand management is performed by selecting the storage battery 121 and making a charge / discharge plan in the other time zones as well.

In addition, the control unit 313 supplies power from the power generation system 104 to consumers whose prediction accuracy information stored in the customer prediction information storage unit 304 is lower than a predetermined value (for example, 0.1). The control which outputs the instruction | indication which supplies electric power with the discharge of the storage battery 121 provided in the consumer with respect to the said consumer may be performed. In the case of a consumer whose prediction accuracy information is low, there is a high possibility that a difference will occur in the charge / discharge plan. Therefore, power is supplied to the consumer by charge / discharge control using the storage battery 121 provided in the consumer. Thus, it is possible to suppress fluctuations in the amount of power and realize a highly accurate charge / discharge plan.

When the control unit 313 performs the control to instruct the consumer to discharge the battery at a predetermined time period using the first target value of the SOC of the storage battery 121 provided in the consumer, the control unit 313 receives the predetermined instruction from the consumer. The notification that the SOC of the storage battery 121 is equal to or lower than the first target value may be received in the time zone. In such a case, the control unit 313 adjusts the amount of electric power to be discharged with other consumers, and changes the first target value indicating the SOC provided to the consumers to the second target value. I do.

FIG. 13 is a diagram illustrating transmission and reception when performing a charge / discharge plan of the storage battery 121 between the supply and demand management server 100 and the first consumer 101_1. In the example shown in FIG. 13, after the control unit 313 calculates the target value of the SOC of the storage battery 121 of the first consumer 101_1, the target value of the SOC and the usage predicted by the first consumer 101_1. The charge / discharge plan including the amount of electric power is transmitted to the first consumer 101_1 (S1301). The transmission is performed every time period.

And when the 1st consumer 101_1 has satisfy | filled the target value of SOC contained in the transmitted charging / discharging plan (for example, the electric power which the 1st consumer 101_1 uses substantially corresponds with prediction) (For example, it may be determined whether a predetermined threshold value T is provided and whether the threshold value T is larger or smaller than the target value with reference to the target value). The communication with the supply and demand management server 100 is not performed again.

On the other hand, when the control unit 211 of the first consumer 101_1 determines that the target value according to the charge / discharge plan cannot be achieved (S1302), a notification that the supply / demand management server 100 cannot be achieved is sent via the communication unit 212. This is performed (S1303). The non-achievable notification is performed when the demand of the first customer 101_1 greatly deviates from the prediction and the storage battery charge / discharge target cannot be achieved.

Also, when the target value is achieved in the time period, the first consumer 101_1 notifies the supply and demand management server 100 of the processing result. In this case, actual demand data is also included.

And when the reception process part 311 receives the said achievement failure notification, the control part 313 includes the other consumers with which the storage battery 121 was provided other than the 1st consumer 101_1 about the said time slot | zone. The charge / discharge plan is recalculated (S1304). Thereby, the charging / discharging plan which reduced the burden of the storage battery 121 of the 1st consumer 101_1 is redesigned. The redesign is also performed in consideration of priority.

And the control part 313 notifies the recalculated charging / discharging plan again to the consumer provided with the storage battery 121 including the 1st consumer 101_1 (S1305).

By performing such recalculation, the target value for charging / discharging of the storage battery including a plurality of consumers is updated with the passage of time, but the newly generated difference is assigned to charging / discharging of the other storage battery. Efficiency calculation may be performed. Thereby, the number of the storage batteries which instruct | indicate a change can be reduced, and the frequency of communication can be reduced.

FIG. 14 is a diagram illustrating the movement of electric power used by the first consumer 101_1 when the storage battery 121 is charged and discharged according to the charging / discharging plan. In the example shown in FIG. 14, the zero value line 1400 indicates the electric energy “0”. And let the electric energy shown in FIG. 14 be the electric energy measured with the smart meter 111_1. In addition, since the demand in the 1st consumer 101_1 is covered by the discharge by the storage battery 121, the life and activity in a consumer are not restricted.

The amount of power 901 indicates the original amount of power demanded by the first consumer 101_1. When the storage battery 121 is not used, the value indicated by the electric energy 901 is supplied via the power system.

The power amount 1411 is an example in which the storage battery 121 is discharged after the power amount used by the first consumer 101_1 is predicted with the above-described configuration. In the time zone D, it is shown that the demand amount does not fall below the zero value line 1400.

The electric energy 1412 shows an example in which the electric energy that can be discharged by the storage battery 121 is discharged regardless of the demand amount of the first consumer 101_1. The amount of power 1412 is below the zero value line 1400 in time zone D. For this reason, as a result, it has shown that the reverse power flow from which electric power flows into the grid | system side from the 1st consumer 101_1 has generate | occur | produced. It is difficult to carry out reverse power flow from equipment other than renewable energy equipment under current Japanese regulations.

In addition, even when a reverse power flow is recognized, it is premised on the establishment of simultaneous and equal amount control technology based on a charge / discharge plan as shown in this embodiment, and it is considered effective even when a reverse power flow is recognized.

FIG. 15 is a flowchart showing the overall processing of the supply and demand management server 100. In the example shown in FIG. 15, the main processing unit 307 acquires weather information and the like from a weather server or the like (S1501), and stores it in the demand prediction information storage unit 301. In addition, the weather information etc. which are memorize | stored in the information storage part 301 for demand prediction shall be updated with progress of time.

Then, the main processing unit 307 creates a power supply plan for one day according to long-term weather information and the like stored in the demand prediction information storage unit 301 (S1502), and the power generation system 104 according to the supply plan. Communicating with power generation companies that have power to procure power to be supplied to consumers. Thereby, the electric energy supplied for every time slot | zone from the electric power generation system 104 is set per day.

And the control part 313 of the main process part 307 creates the priority which makes the consumer which has provided the storage battery 121 discharge for every time slot | zone based on the prediction information memorize | stored in the consumer prediction information storage part 304. (S1503). The priority order may be recreated when the weather information or the like changes.

Thereafter, the demand prediction acquisition unit 306, for each time zone, based on the prediction information stored in the customer prediction information storage unit 304, the power amount of each consumer of the

consumer groups

101 and 102, and the total power amount The short-term prediction is acquired (S1504).

And the control part 313 determines whether the electric energy which the

consumer groups

101 and 102 use is high compared with the electric energy supplied in the said time slot | zone from the short-term prediction result (S1505).

And when it determines with the electric energy which the

consumer groups

101 and 102 use compared with the electric energy supplied being not high (S1505: No), the control part 313 is for every consumer with which the storage battery 121 was provided. Then, the target electric energy (the target value of the SOC of the storage battery 121) to be stored in the storage battery 121 is calculated (S1506).

Then, the transmission processing unit 312 notifies the calculated target power amount for each customer provided with the storage battery 121 (S1507), and the process proceeds to S1513.

On the other hand, if the control unit 313 determines that the amount of power used by the

customer groups

101 and 102 is higher than the amount of power supplied (S1505: Yes), the control unit 313 follows the priority order for discharging in the time period. Then, a target power storage amount (SOC target value) for discharging the amount of power for each consumer is calculated (S1508).

Then, the transmission processing unit 312 notifies the calculated target power storage amount to each customer provided with the storage battery 121 (S1509).

Thereafter, the reception processing unit 311 determines whether or not a notification indicating that the target cannot be achieved has been received from the consumer provided with the storage battery 121 (S1510). When it determines with not having received (S1510: No), it changes to S1513.

On the other hand, when it determines with having received the notification of target unachievable (S1510: Yes), the control part 313 performs recalculation of the target electrical storage amount for every consumer (S1511). Then, the transmission processing unit 312 notifies the recalculated target power storage amount for each customer provided with the storage battery 121 (S1512).

Then, the control unit 313 determines whether or not the day has ended. If it is determined that the day has not ended (S1513: No), the processing is performed from S1504. On the other hand, if it is determined that the day has ended (S1513: Yes), the process ends.

In the supply and demand management server 100 according to the present embodiment, the same amount control can be realized by adjusting the charge / discharge control even when the power used in the short-term prediction or the like is changed by performing the above-described processing.

In this embodiment, after the power is liberalized, when there is a mismatch between the power procured based on the prediction / plan and the power actually consumed by the customer, it is distributed on the customer side. By simultaneously charging and discharging the storage battery, the same amount of power can be realized.

Furthermore, in this embodiment, when the storage battery 121 is deployed to some consumers, the supply and demand management server 100 is provided with a measured value of power demand obtained from the smart meter 111 every 30 minutes and the storage battery 121. Detailed demand data related to the storage battery 121 can be acquired from the consumer. Thereby, the demand-and-supply management server 100 can perform appropriate charge / discharge control after performing the demand prediction of the consumer.

Furthermore, the supply and demand management server 100 achieves the same amount in the charge / discharge control of the storage battery 121 even if the power discharged from the storage battery 121 does not flow to the system side, in other words, without generating a reverse power flow.

Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

Claims

An acquisition unit that acquires a first power amount that is predicted to be consumed by a consumer group that consumes power supplied from the power supply system in a first time zone;
When the first power amount is larger than the second power amount supplied from the power supply system in the first time period, the total amount of allocated power amount is the first power amount. The amount of power discharged from the storage battery is assigned to each consumer in which the storage battery is installed so as to be the difference between the second amount of power, and the allocated amount of power is transferred from the storage battery to the consumer in the first time zone. A control unit that performs control to output an instruction to discharge to
A power management system comprising:
For each consumer in which the storage battery is installed, a storage unit that stores prediction information of power used in the first time zone is further provided,
The control unit allocates the amount of electric power to be discharged for each consumer in which the storage battery is installed, based on the prediction information for each consumer stored in the storage unit.
The power management system according to claim 1.
The power prediction information stored in the storage unit is a demand prediction value indicating the amount of power usage predicted for each consumer's time, prediction accuracy information indicating the accuracy of the demand prediction value, and Including
The control unit allocates electric power for each consumer in which the storage battery is installed, based on a calculation result of the demand prediction value and the prediction accuracy information for each consumer stored in the storage unit.
The power management system according to claim 2.
The control unit is provided in the consumer without receiving power supply from the power supply system for a consumer whose prediction accuracy information stored in the storage unit is lower than a predetermined value. An instruction to supply power by discharging the storage battery is controlled to output to the consumer.
The power management system according to claim 3.
The prediction information stored in the storage unit is stored for each one or more classifications of whether it is weather, temperature, day of the week, and holidays.
The power management system according to claim 2.
When the second power amount is larger than the first power amount, the control unit determines that the total amount of allocated power is a difference between the first power amount and the second power amount. As described above, when allocating electric power for each consumer where a storage battery is installed, based on the prediction information of the electric power stored in the storage unit, in order from the consumer who is determined that the amount of electric power used is large, Control to output an instruction to use the power of the storage battery for each consumer,
The power management system according to claim 2.
When the control unit instructs the consumer to use power, a discharge target that determines the amount of power to be discharged based on the amount of power estimated to be used by the consumer in the first time zone. Indicate the value,
The power management system according to claim 6.
The control unit performs storage of the storage battery installed in the consumer in a time zone in which the first power amount is smaller than the second power amount supplied from the power supply system.
The power management system according to claim 1.
The control unit is configured to store the storage battery installed in the consumer in a time zone in which the first power amount is smaller than the second power amount supplied from the power supply system. Based on the difference between the SOC and the preset storage target value, the storage battery is charged.
The power management system according to claim 8.
The control unit instructs the consumer to discharge in the first time zone with a first value indicating the SOC of a storage battery provided in the consumer, and from the consumer to the first time. When the notification that the SOC of the storage battery is equal to or lower than the first value is received in a band, the first value indicating the SOC provided in the consumer is adjusted by adjusting the amount of power discharged with other consumers To change to other values,
The power management system according to claim 1.