JP2019161939A - Power control device and power control method - Google Patents

Abstract

To make compatible the response to DR requests and the appropriate energy management related to own power generation and consumption.SOLUTION: A power control device 21 for controlling transmission/reception power to and from a power system by managing a unit consumer power system 11 including a power load, a power generator 13 by renewable energy and a power storage device 15, includes: a prediction value provision section 21a for calculating prediction transmission/reception power on the basis of prediction consumption power of the power load, prediction generation power of the power generator and the capacity of the power storage device; a communication section 21b for receiving information about adjustment power from the power system side; and a charge/discharge control section 21c for controlling charge/discharge of the power storage device. The prediction value provision section 21a calculates the prediction transmission/reception power while assuming that the power storage device 15 has a private demand capacity, and an adjustment capacity individually, determines the adjustable power for the adjustment based on the information about adjustment power. The communication section 21b transmits the determination results to the power system side. The charge/discharge control section 21c controls charge/discharge of the power storage device according to the determination.SELECTED DRAWING: Figure 1A

Description

  The present invention relates to a power control device and a power control method, and more specifically, controls a unit consumer power system including a power load, a power generation device and a power storage device using renewable energy, and controls power transmission / reception from the power system. The present invention relates to a power control apparatus and a power control method.

  When the current FIT (Feed-in Tariff) system, which stipulates the purchase price of energy by law, is expected to decline, the purchase price of in-house power generation from renewable energy such as solar power generation is expected to decline. Therefore, it is required to supply and supply privately generated power without selling it. However, power generation using renewable energy such as solar power generation has a characteristic that the amount of power generation is likely to fluctuate due to the influence of the natural environment.

On the other hand, when the electric power supply and demand in an electric power company is tight, it is considered that the electric power company requests electric power adjustment to each household (DR request or Demand Response request).
In the DR request, each household or business operator who is a contract consumer related to the power system applies for power supply and demand prediction (operation plan) that can respond to the DR request, and according to the applied operation plan, power load reduction and power storage device This is done by performing charge / discharge control.

The DR request is made in a form called a “baseline” in which a ratio to save power with respect to the power consumption of the past performance (for example, the average value of the past five days) is presented. If the contract customer does not respond to the DR request as a result, a penalty fee is imposed, or conversely, an incentive fee is added by responding to the DR request.
In order to cope with such a situation, an increase in homes and businesses having power storage devices together with private power generation devices is expected.

For each household and business operator (hereinafter referred to as a unit consumer in this specification, and the power system managed by each unit consumer is referred to as a unit consumer power system), the consumption due to the power load is appropriately managed. In addition, it is becoming important to manage self-generated power wisely and fulfill social responsibility in response to DR requests. On the other hand, it is also important to realize economic energy management.
In relation to this, the following techniques have been proposed (see, for example, Patent Document 1). That is, the photovoltaic power generation power and the demand power are predicted every day, and the prediction of the power to be transmitted / received from the power system on that day (transmission / reception power prediction) is obtained based on the predicted value.

When obtaining transmission / reception power prediction, the user sets a power control mode in accordance with the user's idea, such as an ecology mode that emphasizes environmental characteristics, an economy mode that emphasizes economic efficiency, and a DR mode that responds to social demands. The user can select not only one power control mode but also a plurality of power control modes and determine the ratio of the selected power control mode.
The power control device calculates transmission / reception power prediction from the power system based on the power control mode set by the user. And charging / discharging of a storage battery is controlled so that the transmitted / received power from an electric power system may correspond with the calculated transmitted / received power prediction.

JP, 2006-059186, A

However, in power generation devices that use renewable energy, whose power generation amount is likely to fluctuate, and unit consumer power systems that include a wide variety of power loads, the storage capacity to achieve the power control mode considered by the user is not necessarily ensured. Not necessarily.
At that moment, if power control is performed only based on the power supply / demand balance at that moment, the remaining capacity of the power storage device may be exhausted or the battery may be fully charged. That is, it is not easy to manage the charge / discharge of the power storage device for use in the selected power control mode.
Furthermore, even if a DR request is received from the power system side, the unit consumer is not always able to respond to the request, and the prediction accuracy of power supply and demand cannot be ensured.
The present invention has been made in view of the above circumstances, and provides a power control apparatus capable of satisfying both DR request and appropriate energy management related to own power generation and consumption. Is.

  The present invention is an apparatus for managing a unit consumer power system including a power load, a power generation apparatus using renewable energy, and a power storage apparatus and controlling transmission / reception power from the power system, the predicted power consumption of the power load, A predicted value providing unit that calculates predicted transmission / reception power based on the predicted generated power of the power generation device and the capacity of the power storage device, and information related to the adjusted power to be adjusted with respect to the transmission / reception power as a request on the power system side And a charge / discharge control unit that controls charging / discharging of the power storage device, and the predicted value providing unit includes: (1) the predicted power consumption, the predicted generated power, and the predicted transmission. The predicted transmission / reception power is calculated assuming that the capacity for private supply and demand related to the difference in received power and (2) the adjustment capacity related to the adjustment are individually provided, and based on the information related to the adjusted power The communication unit transmits the determined result to the power system side, and the charge / discharge control unit controls charging / discharging of the power storage device according to the determination. A power control apparatus is provided.

  Further, from a different point of view, the present invention is a method for controlling a unit consumer power system including a power load, a power generator using renewable energy, and a power storage device, and controlling transmitted / received power from the power system, the computer comprising: A predicted value providing step of calculating predicted transmission / reception power based on predicted power consumption of the power load, predicted generation power of the power generation device, and capacity of the power storage device, and adjusting the transmission / reception power as a request on the power system side A step of receiving information on power adjustment power, an adjustment determination step of determining whether or not adjustment is possible or power that can be adjusted based on the information on power adjustment, and transmitting to the power system side; And controlling the charging / discharging of the power storage device according to the determination, both the predicted value providing step and the adjustment determining step, The storage device individually has (1) a capacity for private supply and demand related to the difference between the predicted power consumption, the predicted generated power, and the predicted power transmission and reception power, and (2) an adjustment capacity related to the adjustment. Provided is a power control method executed as

  Furthermore, from a different point of view, the present invention is a program for managing a unit consumer power system including a power load, a power generation device using renewable energy, and a power storage device, and controlling transmission / reception power from the power system, which is executed by a computer The process includes a predicted value providing step of calculating a predicted transmission / reception power based on the predicted power consumption of the power load, the predicted generation power of the power generation device, and the capacity of the power storage device, and the transmission / reception power as a request on the power system side A process of receiving information related to the adjusted power to be adjusted, and an adjustment determination process of determining at least one of adjustment possible or adjustable power based on the information related to the adjusted power and transmitting the information to the power system side And a process for controlling charging / discharging of the power storage device according to the determination, both of the predicted value providing process and the adjustment determining process The power storage device individually has (1) a capacity for private supply and demand related to the difference between the predicted power consumption, the predicted generated power and the predicted power transmission and reception power, and (2) an adjustment capacity related to the adjustment. A power control program for executing the process is provided.

In the power control apparatus according to the present invention, the predicted value providing unit includes: (1) a capacity for private supply and demand relating to a difference between the predicted power consumption, the predicted generated power, and the predicted transmitted / received power; ) Since the predicted transmission / reception power is calculated as having the adjustment capacity related to the adjustment individually, and whether or not the adjustment is possible based on the information related to the adjustment power is determined. It is possible to reconcile response and appropriate energy management for own power generation and consumption.
Specifically, since the charge / discharge control unit separately secures the adjustment capacity and the private supply / demand capacity, and manages each charge / discharge individually, the charge / discharge control unit of the power storage device used in response to a request from the power system side. The capacity and remaining capacity can be easily grasped. Furthermore, the capacity | capacitance of the electrical storage apparatus which concerns on the difference adjustment of the electric power of private power generation, the electric power of private supply and demand, and the transmission / reception electric power with the electric power system side can be grasped | ascertained easily.
In addition, a reasonable capacity for responding to the DR request on the power system side is ensured in the power storage device.
The power control method and the power control program according to the present invention have the same effects.

It is a block diagram which shows the structure of the unit consumer electric power system which concerns on one Embodiment of this invention. It is a block diagram which shows the structure of the unit consumer electric power system of the aspect different from FIG. 1A. It is explanatory drawing which shows a mode that the electric power control apparatus by one Embodiment of this invention classifies and manages the capacity | capacitance of a storage battery. (Embodiment 1) It is a 1st flowchart which shows an example of the process in which the electric power control apparatus by one Embodiment of this invention performs transmission / reception with the electric power grid | system side regarding a DR request. (Embodiment 1) It is a 2nd flowchart which shows an example of the process in which the power control apparatus by one Embodiment of this invention performs transmission / reception with the electric power system side in relation to DR request | requirement. (Embodiment 1) It is a graph which shows an example of the target adjustment amount received from the electric power system side by the electric power control apparatus by one Embodiment of this invention with the prediction transmission / reception amount and adjustment amount which are provided to the electric power system side. (Embodiment 1) FIG. 5 is a graph showing charging / discharging related to the capacity for private supply and demand corresponding to FIG. 4. (Embodiment 1) 5 is a graph showing charging / discharging related to the adjustment capacity corresponding to FIG. 4. (Embodiment 1) It is the graph which combined FIG. 5 and FIG. (Embodiment 1) In one Embodiment of this invention, it is a 1st explanatory drawing which shows the aspect which interchanges electric power with another unit consumer electric power system. (Embodiment 7) In one Embodiment of this invention, it is a 2nd explanatory drawing which shows the aspect which interchanges electric power with another unit consumer electric power system. (Embodiment 7) In one Embodiment of this invention, it is a 3rd explanatory view which shows the aspect which interchanges electric power with another unit consumer electric power system. (Embodiment 7) In one Embodiment of this invention, it is explanatory drawing which shows a mode that power is interchanged with another unit consumer electric power system, and information is exchanged. (Embodiment 7) In one Embodiment of this invention, it is a 1st flowchart which shows the aspect which interchanges electric power with another unit consumer electric power system. (Embodiment 7) In one Embodiment of this invention, it is a 2nd flowchart which shows the aspect which interchanges electric power with another unit consumer electric power system. (Embodiment 7) In one Embodiment of this invention, it is a 3rd flowchart which shows the aspect which interchanges electric power with another unit consumer electric power system. (Embodiment 7)

Hereinafter, the present invention will be described in more detail with reference to the drawings. In addition, the following description is an illustration in all the points, Comprising: It should not be interpreted as limiting this invention.
(Embodiment 1)
≪Unit consumer power system configuration≫
First, a configuration example of a unit consumer power system according to this embodiment will be described.
FIG. 1 is a block diagram showing a configuration of a unit consumer power system according to an embodiment of the present invention. As shown in FIG. 1, the unit consumer electric power system 11 which concerns on this Example is provided with the solar power generation device 13, the storage battery 15, the household appliances 17-1 to 17-n, the power conditioner 19, and the control apparatus 21, and is electric power. It is connected to the system 23. The power conditioner 19 is also called PCS after the acronym of Power Conditioning System.

In FIG. 1, the power generated by the solar power generation device 13 is P _PV , the power of the storage battery 15 is P _bat (positive when discharging, negative when charging), and the power consumed by the home appliances 17-1 to 17-n. P _{L1 to} P _Ln are set. Further, input / output power of the power conditioner is indicated by P _PCS , and transmission / reception power from the power system is indicated by P _s .
The solar power generation device 13 includes a solar battery, and supplies the DC power generated by the solar battery to the power conditioner 19. The DC / DC converter 19a of the power conditioner 19 converts the DC power supplied from the solar power generation device 13 into a predetermined voltage. The DC / DC converter 19a is a one-way operation from the solar power generation device 13, and blocks the flow of power in the reverse direction.

  The storage battery 15 includes a secondary battery such as a lithium ion battery. The DC / DC converter 19b of the power conditioner 19 converts the DC voltage from the storage battery 15 into a predetermined voltage during discharging, and outputs the voltage to the home appliances 17-1 to 17-n and the power system 23 via the bidirectional inverter 19c. To do. At the time of charging, the voltage from the solar power generation device 13 and / or the electric power system 23 is converted into a DC voltage having an appropriate charge level and provided to the storage battery 15 to charge the storage battery 15. The DC / DC converter 19b is a bidirectional operation.

The bidirectional inverter 19c converts a DC voltage output from the solar power generation device 13 or the storage battery 15 via a DC / DC converter into an AC voltage having a predetermined voltage and a predetermined frequency. Moreover, the alternating voltage from the electric power grid | system 23 is converted into a direct voltage, and it provides to the storage battery 15 side.
An example of the predetermined voltage on the AC side of the bidirectional inverter 19c is approximately 100 V, and an example of the predetermined frequency is 50 Hz or 60 Hz, but is not limited thereto. Anything that matches the voltage and frequency of the power system 23 may be used.
Instead of the bidirectional inverter 19c of FIG. 1A, a DC / AC inverter and an AC / DC converter may be used. FIG. 1B is a block diagram showing an aspect in which a DC / AC inverter 19d and an AC / DC converter 19e are connected in reverse parallel instead of the bidirectional inverter 19c of FIG. 1A.
In FIG. 1, the control device 21 and the power conditioner 19 are shown as separate bodies, but may be integrated.

The control device 21 controls the DC / DC converter 19 b to supply the power generated by the solar power generation device 13 to the storage battery 15 and the power system 23. Further, by controlling the DC / DC converter 19b, the charge / discharge and discharge directions of the storage battery 15 and the amount of electric power thereof are controlled.
The control device 21 is configured to include a memory, an input / output circuit, a communication interface circuit, and a timer circuit with a CPU as a hardware resource. Moreover, it functionally includes a predicted value providing unit 21a, a communication unit 21b, and a charge / discharge control unit 21c.
The predicted value providing unit 21a calculates a predicted power transmission / reception amount and an adjustable amount, and the communication unit 21b transmits / receives information to / from the power system side. The charge / discharge control unit 21c controls the charge / discharge of the storage battery 15 using the DC / DC converter 19b.

FIG. 2 is an explanatory diagram showing how the control device 21 shown in FIG. 1 separates and manages the capacity of the storage battery 15.
As shown in FIG. 2, a part of the total capacity of the storage battery 15 is managed as a capacity used for adjustment in response to the DR request (corresponding to the adjustment capacity, see the area indicated by the circled numeral 2 in FIG. 2). Is managed as a capacity used for private supply and demand (corresponding to private supply and demand capacity, see circled numeral 3 in FIG. 2).

A part of the capacity of the storage battery 15 can be allocated to the capacity for adjustment and the capacity for private supply and demand. In addition, it is necessary to secure capacity for avoiding overdischarge and for allowing the control device 21 and the power conditioner 19 to operate in the event of a power failure (see the region indicated by the circled numeral 4 in FIG. 2). ).
In consideration of the life of the storage battery 15, the fully charged state is not preferable, and it is preferable to stop the charging when there is a margin for full charging. It is necessary to allow for that margin (see the area indicated by the circled numeral 1 in FIG. 2).
The control device 21 manages the capacity of the storage battery 15 in consideration of these conditions, and controls the operation of the DC / DC converter 19b to charge / discharge the storage battery 15.

  The capacity of the storage battery 15 shown in FIG. 2 (adjustment capacity, capacity for private supply and demand, and other capacity) is not physically distinguished, and the storage battery 15 receives and discharges the battery 15 as an integral unit. However, the control device 21 calculates and manages these capacities separately. For example, even if there is no DR request, the control device 21 secures a predetermined adjustment capacity and does not use it for private supply and demand.

The adjustment capacity is a capacity that supports the adjustable amount. Here, the adjustable amount is the cumulative total (transmitted / received amount) of the transmitted / received power that can be adjusted on the target date (the current day) in response to the DR request. The control device 21 controls charging / discharging of the storage battery 15 so as to perform power transmission / reception with the power system 23 with the transmission / reception power obtained by correcting the predicted transmission / reception power with the target adjustment power every unit time. Then, it is assumed that the increase / decrease in the adjustment capacity has changed as planned on the day of the target adjustment power (the cumulative total on the day is the target adjustment amount).
On the day, the power consumption actually consumed by the home appliances 17-1 to 17-n and the power generation power of the solar power generation device 13 are accompanied by an error from the predicted power consumption and the predicted power generation. However, as described above, the charge / discharge control unit 21c of the control device 21 controls the charge / discharge of the storage battery 15 so as to perform power transmission / reception with the power system 23 with the power transmission / reception amount obtained by correcting the predicted transmission / reception power with the target adjustment force. . The error between the predicted power consumption and the predicted generated power and the actual result is managed as an error from the charge / discharge plan related to the capacity for private supply and demand, and the balance of the power transmission / reception power with the power system 23 is matched.
According to this embodiment, the charge / discharge control unit 21c reserves a dedicated capacity (adjustment capacity) in response to the DR request from the power system 23 in the storage battery 15, and when the DR request is received, It is possible to determine whether or not the response can be made and to what extent the response can be made to the DR request. On the other hand, the storage battery 15 has a capacity (capacity for private supply and demand) that can be charged and discharged based on the power generated by the solar power generation device 13 and the power consumed by the home appliances 17-1 to 17-n. Be able to respond to both DR requests and power supply and demand at the same time.
Note that the user may respond to the DR request by operating the home appliance to increase or decrease the power consumption and decrease the transmission / reception power. In that case, an error between the predicted power consumption and the actual result occurs when viewed from the control device 21, but when viewed from the power system 23 side, the DR request remains unchanged.

  When the error from the predicted value is large, for example, when the power consumption is larger than the predicted value or the generated power is small, the remaining capacity of the private supply and demand capacity is exhausted and further discharge cannot be performed. In that case, the subsequent discharge related to the capacity for private supply and demand is not performed, and the amount of power received from the power system is increased. On the other hand, when the amount of power consumption is smaller than predicted or the amount of power generation is large, the capacity for self-supply and supply is fully charged, and further charging cannot be performed. In that case, the subsequent charging for the private supply and demand capacity is not performed, and the amount of power received from the power system is reduced or the power is sold.

≪Process related to DR request≫
Next, the exchange with the power system 23 performed by the control device 21 in relation to the DR request will be described.
Regarding the DR request, the exchange procedure has not been finalized before the institutionalization. For example, the following procedure can be considered.
However, some modified examples can be considered in addition to those described below as representative examples. Similarly, the methods described below may be applied to these modified examples. As a modification, for example, adjustment power to be targeted is transmitted every unit time, and a response indicating whether or not the adjustment power is supported is returned. Or the adjustment electric power for every unit time which should be made a target from the electric power system side is transmitted, and the thing which returns the time slot which can respond, or the electric power which can respond for every unit time is mentioned.
A typical example is described below.
3A and 3B are flowcharts showing an example of processing in which the control device 21 performs transmission and reception with the power system side in relation to the DR request in this embodiment. The procedure will be described with reference to the flowchart.
In this embodiment, the control device 21 repeatedly executes the processes shown in FIGS. 3A and 3B. For example, the processing may be executed at a predetermined time interval using a timer circuit, but the time interval is not necessarily constant.

As shown in FIG. 3A, first, the predicted value providing unit 21a of the control device 21 determines whether it is time to calculate the predicted transmission / reception power (step S11).
In this embodiment, the information related to the DR request is exchanged every day, and the transition of predicted transmission / reception power on the day (the same day) subject to the DR request at 14:00 the previous day based on the date subject to the DR request. Is calculated.
When it is determined that the time for calculation has arrived (Yes in step S11), the predicted value providing unit 21a of the control device 21 performs the unit consumer power system 11 predicted to receive supply from the power system 23 the next day. The transmission / reception power P _s (for example, every 30 minutes) is calculated (step S13).

FIG. 4 shows the transition of the predicted transmission / reception power provided to the power system 23 by the control device 21 (see the circled numeral 1 in FIG. 4) and the transition of the adjustable force described later (see the circled numeral 2 in FIG. 4). It is a graph which shows an example. Furthermore, it is a graph which shows an example of transition of the target adjustment power received from the power system side after provision of predicted transmission / reception power and adjustable power (see the circled numeral 3 in FIG. 4). As shown in FIG. 4, the predicted transmission / reception power is calculated by dividing the current day into unit times. The same applies to the adjustable force and the target transmission / reception power.
When calculating the predicted transmission / reception power, you may refer to the weather forecast for the next day's weather and temperature / humidity, similar weather, the past several years of temperature / humidity days, the power consumption of the power load of the past several days, etc. . For example, the communication unit 21b may acquire the information by accessing the Internet or the like, or the past performance is stored as a history in the memory included in the control device 21, and the information may be referred to. And you may combine both. However, the calculation method is not limited to this.

When calculating the predicted transmission / reception power, the predicted value providing unit 21a of the control device 21 first calculates predicted generated power that is a predicted value of the generated power per unit time of the solar power generation device 13. Also, predicted power consumption ΣP _i [i = 1 to n], which is a predicted value of power consumption per unit time of the home appliances 17-1 to 17-n, is calculated. Then, transmission / reception power obtained by subtracting the predicted generated power from the predicted power consumption is calculated. This corresponds to a predicted value of transmitted / received power when there is no storage battery 15. Furthermore, the predicted value providing unit 21a of the control device 21 calculates predicted power transmission / reception power by subtracting the charge / discharge power corresponding to the capacity for private supply and demand of the storage battery 15. This can be said to be transmission / reception power in consideration of charging / discharging power related to the private supply / demand capacity of the storage battery 15.
The predicted transmission / reception power calculated in this way is also called a baseline.

FIG. 5 is a graph showing charge / discharge related to the capacity for private supply and demand corresponding to FIG. The circled number 1 in FIG. 5 indicates the predicted transmission / reception power as in FIG. The circled number 0 (zero) in FIG. 5 corresponds to the predicted value of the transmitted / received power when the storage battery 15 is not present.
That is, the predicted generated power (see the graph of the circled number 1) in consideration of the charge / discharge power related to the self-receiving capacity is subtracted from the predicted transmitted / received power (see the graph of the circled number 0) when there is no storage battery. The hatched portion in FIG. 5 corresponds to the charge / discharge amount related to the capacity for private supply and demand of the storage battery 15. The capacity for private supply and demand can be said to be a capacity necessary for realizing the predicted power transmission / reception amount.
The predicted value providing unit 21a of the control device 21 transmits the calculated transition of the predicted power transmission / reception power to the power system 23 (step S15), and then proceeds to step S17.
When it is determined in step S11 that it is not time to calculate the predicted transmission / reception power (No in step S11), the process proceeds to step S17.

In step S17, the predicted value providing unit 21a of the control device 21 determines whether it is time to calculate the adjustable force.
In this embodiment, the transition of the predicted transmission / reception power is calculated at 15:00 on the previous day based on the day (the current day) that is the target of the DR request. However, not limited to this, for example, the adjustable force may be calculated at the same time as the calculation of the predicted transmission / reception power.
If it is determined that the calculation time has arrived (Yes in step S17), the predicted value providing unit 21a of the control device 21 can adjust the predicted transmission / reception power as a reference when it receives a DR request from the power system 23. The power (adjustable force) for each predicted unit time (for example, every 30 minutes) is calculated (step S19).

FIG. 6 is a graph showing charging / discharging related to the adjustment capacity corresponding to FIG. 4. As in FIG. 4, the circled number 1 in FIG. 6 indicates the predicted power transmission / reception power, and the circled number 3 indicates the adjustable force. The hatched portion in FIG. 6 is the adjustable amount, which corresponds to the charge / discharge amount related to the adjustment capacity of the storage battery 15. The adjustment capacity can be said to be a capacity necessary for realizing the DR request. The portion obtained by subtracting the adjustable power (see the circled number 3 graph) from the predicted power transmission / reception power (see the circled number 1 graph) is based on the assumption that the DR request is handled using all of the adjustable power. It corresponds to the power transmitted and received from the power system.
The predicted value providing unit 21a of the control device 21 transmits the current transition of the calculated adjustable force to the power system 23 (step S21), and the process proceeds to step S23.
If it is determined in step S17 that it is not time to calculate the predicted transmission / reception power (No in step S17), the process proceeds to step S23.

In step S <b> 23, the communication unit 21 b of the control device 21 checks whether or not the change on the day of the adjustment force (target adjustment force) to be targeted has been received from the power system 23. The target adjustment power sent from the power system 23 is a response from the power system 23 to the adjustable power transmitted to the power system 23 in step S21, and is a specific target value of the DR request. That is, it is the electric power per unit time that should be the adjustment target based on the predicted transmission / reception power.
The circled numeral 3 in FIG. 4 corresponds to the target adjustment force. In the example shown in FIG. 4, the target adjustment force is slightly smaller than the adjustable force. However, this is only an example. In some cases, the target adjustment force is equal to the adjustable force. However, the target adjustment power does not exceed the adjustable power. It is because it cannot respond even if it requests the target adjustment power that exceeds the ability. On the other hand, the target adjustment force may be zero. This is a case where there is a sufficient margin in the supply capacity of the power system.

Furthermore, the target adjustment force may be negative. Although power is generated by the power generation device, if the power is greatly transmitted to the power system 23, it is assumed that the system voltage adjustment becomes difficult. In such a case, there is a possibility that the power system 23 side is requested to suppress transmission of the power generated by the solar power generation device 13 to the power system 23. When it is assumed that the system power side makes a negative DR request, both the positive and negative values should be calculated and provided to the power system side for the calculation of the adjustable amount. It is assumed that there is no DR request.
The response to the negative DR request can be easily estimated by those skilled in the art based on the response to the positive DR request described in this embodiment.

In this embodiment, the transition of the target adjustment power on the current day is received at 16:00 on the previous day based on the day (the current day) subject to the DR request. However, the present invention is not limited to this, and it may be received before the day starts after the transmission of the predicted transmission / reception power and the adjustable power.
If the change of the target adjustment force on the day is received (Yes in step S23), the control device 21 stores the received change of the target adjustment force in the memory (step S25). Then, the process proceeds to step S27 in FIG. 3B.
If it is determined in step S23 that the target adjustment force is not received (No in step S23), the process proceeds to step S27 in FIG. 3B.

In step S27 shown in FIG. 3B, the control device 21 determines whether or not it is a day (current day) that is a target of the DR request. If it is judged that it is the day, the charge / discharge control part 21c of the control apparatus 21 will control the charge / discharge of the storage battery 15 according to transition of target adjustment power.
At the same time, the transmission / reception power is controlled so as to achieve the predicted transmission / reception power per unit time with respect to the actual generation power of the solar power generation device 13 and the actual power consumption of the home appliances 17-1 to 17-n. Do. Specifically, charging / discharging of the storage battery 15 is controlled (step S29).

FIG. 7 is a graph combining FIG. 5 and FIG.
Of the two hatched portions in FIG. 7, the upper hatched portion indicates the amount managed as the charge / discharge amount related to the private supply / demand capacity, and the lower hatched portion is managed as the charge / discharge amount related to the adjustment capacity. It shows the amount to be done. A region sandwiched between the upper and lower hatched portions is a target value of the power transmission / reception amount that the unit consumer power system 11 receives from the power system 23 including the response to the DR request.
The control device 21 stores the results for each unit time in the memory during the day (current day) subject to the DR request. Then, the process proceeds to step S31.
If it is determined in step S27 that it is not time to calculate the predicted power transmission / reception amount (No in step S27), the process proceeds to step S31.

Here, the target adjustment amount that is the cumulative total of the target adjustment power on the day is a target value that indicates how much the transmission / reception amount should be adjusted based on the predicted transmission / reception amount that is the cumulative total of predicted transmission / reception power on the current day. Therefore, when the predicted power transmission / reception amount is achieved 100% and the target adjustment amount is achieved 100%, the DR request is handled 100%. If any one of the predicted power transmission / reception amount and the target adjustment amount is achieved at some percentage, it does not correspond to the DR request 100%.
After the date that is the target of the DR request is over, the control device 21 sends the DR performance data stored in the memory to the power system 23.

In step S31, the communication unit 21b of the control device 21 determines whether or not it is time to transmit the result for the DR request.
In this embodiment, the time when the DR performance is transmitted is 0:00 of the next day, that is, immediately after the day ends.
When it is time to transmit the DR performance (Yes in step S31), the communication unit 21b of the control device 21 transmits the current performance data stored in the memory to the power system 23 (step S33). Then, the process ends.
If it is determined in step S31 that it is not time to transmit the result (No in step S33), the process is also terminated.

≪Specific example of response to DR request≫
A state of responding to the DR request of the control device 21 according to the present invention will be described with specific numerical examples.
First, an example of a calculated value of predicted transmission / reception power (baseline) will be described.
The predicted transmission / reception power in a certain unit time is calculated as the average of the actual results in the same unit time in the past five days.
For example, the average value of results in that unit time is
Power generated by the solar power generation device 13 (P _PV ): 2 (kW)
Total power consumption of home appliances 17-1 to 17-n (ΣP _i [i = 1 to n]): 3.5 (kW)
Discharge power (P _bat ) of the storage battery 15 related to the capacity for private supply and demand: 0.5 (kW)
And

Transmitting and receiving power P _S which is predicted on the unit time,
P _S = ΣP _i [i = 1 to n] −P _PCS = ΣP _i [i = 1 to n] − (P _PV + P _bat ) = 1.0 (kW)
It is.
Prediction value providing unit 12a, a power transmitting and receiving power P _S predicted in each unit time from the beginning to the end of the DR request target date (day) is calculated in accordance with the procedure described above, to the sum the predicted power transmitting and receiving amount.

Further, the predicted value providing unit 12a determines the adjustable force according to the following procedure.
(1) A unit time in which the discharge power from the storage battery 15 is smaller than a predetermined threshold is extracted from the unit time when the predicted transmission / reception power is not zero.
(2) Among the extracted unit times, an appropriate value is determined as an adjustable force in order from the unit time of the earlier time. The appropriate value may be, for example, a value set by the user in advance together with the size of the adjustment capacitor, or may be a difference between a predetermined threshold and discharge power.
(3) In calculation, it is assumed that the time zone after the remaining capacity of the adjustment capacity related to the adjustable force is exhausted cannot be handled (adjustable force is zero).

(Embodiment 2)
In the first embodiment, the adjustable power is determined in order from the unit time of the earlier time among the unit times extracted in the adjustable power determination procedure (2), and the remaining capacity of the adjustment capacity is exhausted for calculation. Is the unit time that can be adjusted.
On the other hand, this embodiment determines the adjustable force in order from the unit time in which the predicted transmission / reception power is large among the unit times similarly extracted in the adjustable power determination procedure (2). The unit time that can be adjusted is the time until the remaining capacity of the capacity runs out.
In this way, it is possible to respond to the DR request by giving priority to a time zone in which the transmission / reception power from the power system is large.

(Embodiment 3)
In the second embodiment, the control device 21 preferentially responds to the DR request by giving priority to a unit time with its own predicted transmission / reception power (that is, one unit consumer power system).
On the other hand, this embodiment communicates with the external control apparatus which controls another unit consumer electric power system.
The external control device that communicates may be a control device that controls a unit consumer power system in a wide area, or narrowly, a control device that controls a unit consumer power system in a building with a housing complex. It may be. The mode is not limited as long as communication with one or more external control devices is possible.

The control device 21 receives a predicted transmission / reception power calculated by another control device and calculates its own predicted transmission / reception power, but also includes a group including the predicted transmission / reception power of other unit consumer power systems. The predicted transmission / reception power is calculated.
Then, instead of the predicted transmission / reception power of the second embodiment, a unit time with a large total value of the predicted transmission / reception power is preferentially handled in response to the DR request.
According to this aspect, for example, as a group of a certain region or a certain building, it is possible to preferentially respond to a DR request with priority given to a time zone in which transmitted / received power from the power system is large.

(Embodiment 4)
The power actually consumed by the home appliances 17-1 to 17-n and the power generated by the solar power generation device 13 are accompanied by errors from the predicted power consumption and the predicted generated power.
As described in the first embodiment, the charge / discharge control unit 21c manages the error between the predicted power consumption and the predicted generated power and the actual result as an error from the charge / discharge plan related to the capacity for private supply and demand. The balance of power transmission / reception with 23 is matched.

  As shown in FIG. 5 and FIG. 7, the predicted generated power (circled number) considering the charge / discharge power related to the self-receiving capacity from the predicted transmitted / received power (see the graph with the circled number 0) when there is no storage battery. The portion indicated by the oblique lines from which 1 is subtracted) corresponds to the charge / discharge amount related to the capacity for private supply and demand of the storage battery 15.

In the first to third embodiments, the charging / discharging control unit 21c controls charging / discharging of the storage battery 15 so as to respond to the DR request until the remaining capacity of the adjustment capacity disappears (becomes zero). That is, the threshold value of the adjustment capacity related to the determination as to whether or not the DR request can be handled is zero. On the other hand, in this embodiment, the threshold value of the adjustment capacity related to the determination as to whether or not the DR request can be handled is determined in consideration of the remaining amount prediction error. Of course, the greater the prediction error, the greater the threshold.
For this purpose, the control device 21 stores the predicted power consumption and the predicted generated power in the memory as predicted errors.

(Embodiment 5)
In the first embodiment, the private supply and demand capacity and the adjustment capacity have been described as fixed capacities set in advance. However, it has been stated that the capacity for private supply and demand and the capacity for adjustment are not physically distinguished within the storage battery 15, but are only calculated and managed separately.
In this embodiment, a mode is described in which the capacity for private supply and demand and the capacity for adjustment are changed every time the predicted transmission / reception power and the adjustable power are calculated, or as necessary.

  In this embodiment, the predicted value providing unit 12a of the control device 21 calculates the predicted power transmission / reception power (baseline) and the predicted power consumption of each unit time based on the predicted weather conditions and past results. Calculate the predicted power generation.

And the capacity | capacitance of the storage battery 15 estimated to be required in order to make it correspond with the calculated estimated transmission / reception power is calculated as a capacity for private supply and demand. The calculated capacity for private supply and demand is allocated to the storage battery 15, and the remaining available capacity is allocated to the adjustment capacity.
That is, instead of calculating the predicted transmission / reception power based on a predetermined amount of private supply / demand capacity, after securing the necessary private supply / demand capacity, the predicted transmission / reception power is calculated based on that.

Further, the adjustable force is calculated based on the adjustment capacity allocated as the remaining available capacity.
Accordingly, an appropriate capacity is determined by reflecting the weather conditions predicted in determining the necessary private supply and demand capacity, past results, and the mode set by the user.

(Embodiment 6)
In this embodiment, the self-supply / demand capacity and the adjustment capacity are changed every time the predicted transmission / reception power and the adjustable power are calculated, or as necessary, as in the fifth embodiment.
However, unlike the fifth embodiment, the control device 21 further calculates the discharge power of the storage battery 15 related to the capacity for private supply and demand, with further expectation of the prediction error described in the fourth embodiment.
Therefore, not only the meteorological conditions, past performance, and the mode set by the user are predicted when determining the necessary self-supply / demand capacity, but also the prediction error is reflected to determine the appropriate self-supply / demand capacity. The

(Embodiment 7)
In the third embodiment, the control device 21 communicates with an external control device that controls another unit consumer power system, and calculates the total value of predicted transmission / reception power as a set of a certain area or a building, for example. The aspect corresponding to the DR request was described.
In the present embodiment, a mode in which the control device 21 communicates with an external control device that controls another unit consumer power system to accommodate power will be described.

According to this embodiment, the unit consumer power system having a sufficient capacity for adjustment related to charging / discharging corresponding to the DR request is the power for the other unit consumer power system to respond to the DR request with the margin. Versatile as a quantity.
The storage battery 15 of the unit consumer power system 11 according to this embodiment has a capacity that is basically sufficient with respect to the capacity required for adjustment and the capacity for private supply and demand used for private supply and demand, corresponding to the DR request. It shall be.
However, among other unit consumer power systems, there may be, for example, one that does not have a storage battery or one that has neither a storage battery nor a power generation device. Or the storage battery of other unit consumer electric power systems may fail, and it cannot respond to DR request.
Therefore, when there is a surplus capacity, power may be accommodated in such other unit consumer power systems. By doing so, it is possible to respond more to the DR request from the power system 23 as a group of areas or buildings.

FIG. 8A to FIG. 8C are explanatory diagrams showing a mode in which the control device 21 exchanges power with a control device related to another unit consumer power system in this embodiment. Moreover, FIG. 9 is explanatory drawing which shows a mode that the control apparatus 21 exchanges the information regarding the interchanged electric power with the control apparatus which concerns on another unit consumer electric power system in this embodiment.
Furthermore, FIG. 10A-FIG. 10C are flowcharts which show the process in which the control apparatus 21 interchanges electric power with the control apparatus of another unit consumer electric power system in this embodiment.
8A to 8C, homes A to Z are unit consumer power systems connected to the same power system (not shown in FIGS. 8A to 8C), respectively. The home A includes a control device A. The control devices A to Z control power transmission and reception between the home A to home Z systems and the power system, respectively.

  The home B corresponds to the unit consumer power system 11 of FIG. 1, and the control device B corresponds to the control device 21 shown in FIG. However, the home A has a configuration different from the unit consumer power system 11 of FIG. Now, it is assumed that the home A is provided with a solar power generation device but not a storage battery. Therefore, even if a DR request is received from the power system, it is not possible to respond to the DR request in weather conditions and time zones where sufficient sunlight cannot be obtained. Since the home A does not include a storage battery, the control device A has a different configuration from the control device 21 shown in FIG. 1 in that it does not control charging / discharging of the storage battery. However, the hardware resource is the same as that of the control device 21, and the point that performs the exchange related to the DR request with the power system is the same as that of the control device 21.

  In this embodiment, it is assumed that home A receives power interchange from home B. The home C to the home Z may have a configuration different from the unit consumer power system 11 of FIG. 1 or a similar configuration. The control device C to control device Z may be different in configuration from the control device 21 of FIG. 1 or may be the same.

FIG. 10A is a flowchart illustrating processing of the control device A on the side that receives power interchange. The control device A repeatedly executes the process of FIG. 10A as in the processes shown in FIGS. 3A and 3B.
Similar to the processing of steps S11 to S15 in FIG. 3A, the control device A calculates the transition of the predicted transmission / reception power when the predetermined time arrives (time of 14:00 on the previous day assuming that it is the same as in the first embodiment). And transmit to the power system side.
Further, the remaining capacity of the adjustment capacity is sequentially calculated on the day of the DR request.

As a result of the calculation, it is determined that the remaining capacity of the adjustment capacity is zero, or the remaining capacity does not satisfy a criterion (threshold value) that anticipates the prediction error when the DR request is considered in consideration of the prediction error. When it judges (step S41 of FIG. 10A), the control apparatus A confirms whether the assistance signal has been transmitted to the control apparatus which concerns on another unit consumer electric power system (step S43).
If the transmission has been completed (Yes in step S43), the process proceeds to step S49. If the transmission has not been performed, the insufficient power is calculated (step S45). It is a value indicating how much power is desired to be accommodated. Then, together with the calculated insufficient power, information (support signal) indicating that support is required is transmitted to an external control device (step S47). Then, the process proceeds to step S49.

FIG. 8A shows that the control device A transmits a support signal to the external control devices B to Z.
In step S49, the control device A waits for reception of a supportable signal from any external control device (step S49). If the supportable signal is not received, power is not interchanged (No in step S49), but if a supportable signal is received from an external control device (Yes in step S49), supportable signals are sent from a plurality of control devices. It is checked whether it has been received (step S51).
When a support enable signal is received from only one control device (No in step S51), a support request signal is transmitted to the control device (step S53).

FIG. 8B shows a state where the control device A receives a supportable signal from the control device B. FIG. 8C shows a state in which the control device A transmits a support request signal to the control device B.
It should be noted that supportability is added as information to the received supportable signal. The supportability is information indicating how much power can be supported per unit time with respect to the insufficient power calculated in step S45 described above.
On the other hand, when the supportable signals are received from the plurality of control devices in step S51 (Yes in step S51), the control device A compares the supportable power added to each received supportable signal, Determine who can get help. Then, a support request signal is transmitted only to the determined partner (step S55).

However, the present invention is not limited to this, and the support request signal may be transmitted to a plurality of opponents. In this case, however, it is necessary to add information (designated support power) indicating how much power is supported per unit time to the support request signal. This is to prevent the power supplied from a plurality of opponents from exceeding the insufficient power calculated in step S45 described above.
Upon receiving the support request signal, the control device of the other party accommodates power that can be supported to the home A every unit time in accordance with the support capability (designated support power when requesting support from a plurality of partners).

FIG. 10B is a flowchart illustrating processing of the control device B that receives the support signal from the control device A.
The control device B executes the process of FIG. 10B in parallel with the process shown in FIGS. 3A and 3B. Moreover, it repeatedly performs like the process shown to FIG. 3A and FIG. 3B.
The control device B checks whether or not a support signal has been received from an external control device (step S61). If the support signal is not received (No in step S61), the process proceeds to step S67. If the support signal is received (Yes in step S61), the power per unit time that can be supported (supportable power) Is calculated (step S63). Then, the calculated supportability is transmitted to the other party (the control device A in this embodiment) that transmitted the support signal (step S65), and the process proceeds to step S67.

  In step S67, the control device B checks whether or not a support request signal has been received from the other party that has transmitted the support signal (step S67). If the support request signal is not received (No in step S67), the process ends. If the support request signal is received (Yes in step S67), the process is terminated based on the designated support force added to the received support request signal. Then, the power to be accommodated is stored in the memory (step S69).

Further, the control device B on the side of accommodating power repeatedly executes the process of FIG. 10C in parallel with the process shown in FIGS. 3A and 3B and the process shown in FIG. 10B. Then, during the period when the power is accommodated, the actual value of the accommodated amount of power (the value obtained by integrating the power) is stored in the memory, and after the period ends, the amount of energy accommodated by the control apparatus A as the support destination is stored. Charge the corresponding fee.
For this purpose, first, the control device B determines whether or not a time zone for accommodating power has arrived (step S81).
If it is not the time zone for accommodating power, the process proceeds to step S87 (No in step S81), but if it is the time zone for accommodating power (Yes in step S81), the accommodated power (or the accommodated power). The amount of power that is the integrated value) is monitored, and the united power is stored in the memory each time the unit time elapses (step S83). And the electric energy which integrated | accumulated the interchanged electric power is calculated (step S85), and it progresses to the process of step S87.

In step S87, the control device B determines whether or not the end of the period for accommodating power has come. If it is not the end, the process is terminated (No in step S87). If the end is reached (Yes in step S87), it is confirmed whether a billing for the interchanged electric energy has been performed (step S89).
If charged (Yes in step S89), the process is terminated. If not charged (No in step S89), the integrated value of the interchanged power is obtained by referring to the memory, and the amount of power related to the interchange is obtained. A billing amount corresponding to the accommodated electric energy is calculated using the unit price (step S91).
Then, the calculated invoice amount is transmitted to the accommodation destination control device A (step S93).

FIG. 9 is an explanatory diagram showing a state in which the control device B of the home B exchanges information with the control device A of the home A in this embodiment.
Home A and home B are connected to each other via a power line so that power can be accommodated. Although it may be connected by a dedicated power line, it may be connected via a power network that receives power from the same system power.
The control device A and the control device B are communicably connected, and send and receive information related to the support signal shown in FIG. 8A, the support enable signal shown in FIG. 8B, the support request signal shown in FIG. 8C, and the billed amount shown in FIG. .
Moreover, the control apparatus B can monitor the electric power (or integrated value of the interchanged electric power) that the household B has accommodated in the household A (see step S83 in FIG. 10C).

  With the configuration as described above, power is interchanged from the home B to the home A, information on the billing amount corresponding to the accommodated amount of power is transmitted and received, and settlement is performed between the home A and the home B. The settlement may be settled as a home A incentive and penalty for a DR request from the power system. In other words, the power system side settles the incentive or penalty of the home A corresponding to the accommodated power amount with respect to the power charge of the home B instead of the home A.

As mentioned above,
(I) A power control device according to the present invention is a device that manages a unit consumer power system including a power load, a power generator using renewable energy, and a power storage device, and controls transmission / reception power from the power system, The predicted value providing unit that calculates the predicted transmission / reception power based on the predicted power consumption of the power load, the predicted generation power of the power generation device, and the capacity of the power storage device, and the transmission / reception power should be adjusted as a request on the power system side A communication unit that receives information relating to the adjusted power; and a charge / discharge control unit that controls charging / discharging of the power storage device, wherein the predicted value providing unit includes: (1) the predicted power consumption; Calculate the predicted transmission / reception power as having the capacity for private supply and demand related to the difference between the predicted generation power and the predicted transmission / reception power, and (2) the adjustment capacity related to the adjustment, and The communication unit determines whether or not adjustment is possible based on the information related to the adjusted power, and the communication unit transmits the determined result to the power system side, and the charge / discharge control unit determines whether the storage battery is in response to the determination. It is characterized by controlling charging / discharging of the battery.

In the present invention, the unit consumer power system is a power system that is owned by a consumer who individually enters into a power supply contract with a service provider of the power system, and is a system connected to the power system. The specific mode is, for example, a power system of a home or a business operator.
Moreover, although the power generation device using renewable energy is a private power generation device represented by a solar power generation device, it is not limited to a solar power generation device, and is a wind power generation device or a power generation device using other renewable energy. May be. The solar power generation device in the above-described embodiment corresponds to the power generation device using renewable energy according to the present invention.

Furthermore, the power storage device is a device that stores electrical energy, typified by a storage battery. The type of storage battery is not limited. The storage battery in the above-described embodiment corresponds to a power storage device.
The power load refers to a device that consumes power, and its type is not limited. The household electrical appliance in the above-described embodiment corresponds to the power load of the present invention.
The electric power system is an electric power network provided by a service provider having power generation facilities, power transmission / distribution facilities, and the like in order to supply electric power to an area. The service provider not only supplies electric power to the unit consumer, but also purchases electric power generated by the unit consumer. Therefore, not only power transmission from the power system side to the unit customer side but also power transmission from the unit customer side to the power system side is performed.

The transmission / reception power, the predicted power consumption, the predicted generated power, and the predicted transmission / reception power are all per unit time. Here, the unit time is a unit of time determined by a power supply and demand contract or the like in order to manage transmission / reception power and the like on the power system side and the consumer power system side. As a specific embodiment, the unit is generally 30 minutes, but is not limited thereto.
The request may be a request for power adjustment from the power system side to the unit consumer side, that is, a DR request with an incentive and / or penalty based on a power supply / demand contract.
The power control apparatus can be configured by a memory, an input / output circuit, a communication interface circuit, a timer circuit, and the like, for example, with a CPU at the center. In the above-described embodiment, the control device corresponds to the power control device of the present invention. Furthermore, it is good also as an electric power control apparatus including a power conditioner.

Furthermore, the preferable aspect of this invention is demonstrated.
(Ii) The predicted value providing unit can be adjusted per unit time that can be adjusted when a request is received from the power system side, assuming that the power storage device has the private supply and demand capacity and the adjustment capacity separately. The communication unit provides the calculated predicted transmission / reception power and the adjustable power to the power system side, and based on the provided predicted transmission / reception power and the adjustable power, the unit related to the adjusted power The target adjustment power for each time is received, and the charge / discharge control unit determines a target charge / discharge power per unit time according to the request, and the charge / discharge amount according to the target charge / discharge power is determined as the adjustment capacity. And managing the difference in unit time of the power consumption of the power load, the generated power of the power generation device and the predicted transmission / reception power as the charge / discharge power related to the private supply / demand capacity. .
Even if the self-supply / supply capacity and the adjustment capacity in the power storage device are not physically separated, the charge / discharge control unit can adjust the charge / discharge amount and the remaining capacity related to the self-supply / supply capacity and the adjustment capacity. The charge / discharge amount and the remaining capacity relating to the capacity can be individually managed.

  Note that the charge / discharge control unit may manage the charge / discharge power by a different method depending on the presence or absence of the DR request. For example, when there is no DR request, the charging / discharging power of the power storage device is determined based on the actual power consumption of the power load, the actual generated power of the power generation device, and the predicted transmission / reception power as described above, and there is a DR request. On the day, charge / discharge power of the power storage device may be determined based on predicted power consumption, predicted generated power, and predicted power transmission / reception power. That is, on the day when there is a DR request, an error between the predicted transmission power and the actual transmission / reception power may be calculated and the DR request may be handled in consideration of the error. In this case, the charge / discharge control unit manages the adjustment capacity including the error between the predicted power consumption and the predicted generated power and the actual results.

Furthermore, the adjustable power is a power value per unit time reflecting the amount that can be reduced from the reference or increased on the basis of the predicted transmission / reception power.
The communication unit may receive target transmission / reception power instead of the target adjustment power. Here, the target transmission / reception power is the transmission / reception power obtained by subtracting the target adjustment power from the predicted transmission / reception power.
In addition, the predicted value providing unit may calculate the predicted transmission / reception power and the adjustable power at the same time and provide them to the power system side. However, the present invention is not limited thereto, and both may be calculated at different points in time. May be provided at.

(Iii) The self-supply / supply capacity and the adjustment capacity may both be a predetermined capacity.
If it does in this way, based on each predetermined capacity | capacitance, the predicted value provision part can each calculate estimated transmission / reception power and adjustable power.

(Iv) The charge / discharge control unit may perform control so as to charge / discharge from the adjustment capacitor in preference to a time zone in which the transmission / reception power is large.
In this way, even if the capacity for adjustment is limited, it is possible to respond to a request for power reduction by giving priority to a time zone in which transmission / reception power from the power system side is large.

(V) The unit consumer power system is connected to the power system side so that power can be interchanged with at least one other unit consumer power system, and the communication unit controls the other unit consumer power system. The external charging / discharging control unit receives and transmits information to / from the external power control device, and the transmission / reception power from the power system summing the predicted transmission / reception power of the other unit consumer power system and its own predicted transmission / reception power is Control may be made so that discharging from the adjustment capacitor is performed with priority given to a large time zone.
In this way, including other unit consumer power systems, for example, as a group of buildings in a certain area or housing complex, priority is given to the time zone when the power transmitted and received from the power system side is large. It becomes possible to respond to the request.

(Vi) an error storage unit that stores a history of errors between the predicted transmission / reception power calculated by the prediction value providing unit and the actual transmission / reception power, the prediction value providing unit being capable of handling the error You may determine the said adjustment electric power including charging / discharging electric power.
In this way, it is possible to determine the adjustment power more reliably in consideration of the past error between the predicted transmission / reception power and the actual transmission / reception power. This configuration is related to the fourth embodiment.

(Vii) After receiving the request, the predicted value providing unit determines charge / discharge power related to the private supply / demand capacity, and then allocates the remaining capacity that can be used by the power storage device to the adjustment capacity. It may be.
In this way, for example, when determining the predicted power consumption, the predicted generated power, and the predicted transmission / reception power reflecting the past results, the capacity for private supply and demand according to the results is first determined, and the adjustment capacity is based on that. Therefore, the capacity for private supply and demand and the capacity for adjustment can be determined at a reasonable ratio based on the actual results.

(Viii) further comprising an error storage unit that stores a history of errors between the predicted transmission / reception power calculated by the prediction value providing unit and the actual transmission / reception power, the prediction value providing unit being capable of handling the error You may determine the charging / discharging electric power which concerns on the said capacity | capacitance for private supply including charging / discharging electric power.
In this way, for example, when determining predicted power consumption, predicted generated power, and predicted transmission / reception power reflecting past performance, the capacity for private supply and demand and the capacity for adjustment are determined at a reasonable rate according to the performance. In addition, it is possible to determine the capacity for private supply and demand and the capacity for adjustment based on more accurate information that takes into account the error between the predicted value and the actual results.

(Ix) The unit consumer power system is connected to the power system side so that power can be interchanged with at least one other unit consumer power system, and the communication unit controls the other unit consumer power system. The charge / discharge control unit transmits and receives information to and from the external power control device, and when there is another unit consumer power system that has a margin for the adjustment capacity and cannot respond to the request, the other unit consumer power system In addition, an excess of the adjustment capacity may be accommodated.
In this way, by surplus adjustment capacity to other unit consumer power systems, it is possible to respond appropriately to requests from the power system side, for example, as a group of buildings in certain areas or apartment buildings. It becomes possible.

Preferred embodiments of the present invention include combinations of any of the plurality of embodiments described above.
In addition to the embodiments described above, there can be various modifications of the present invention. These modifications should not be construed as not belonging to the scope of the present invention. The present invention should include the meaning equivalent to the scope of the claims and all modifications within the scope.

11: Unit customer power system, 13: Solar power generation device, 15: Storage battery, 17-1, 17-n: Home appliance, 19: Power conditioner, 19a, 19b: DC / DC converter, 19c: Bidirectional inverter, 19d: DC / AC inverter, 19e: AC / DC converter, 21: control device, 21a: predicted value providing unit, 21b: communication unit, 21c: charge / discharge control unit, 23: power system

Claims (11)

An apparatus for managing a unit consumer power system including an electric power load, a power generation device and a power storage device using renewable energy, and controlling transmission / reception power from the power system,
A predicted value providing unit that calculates predicted power transmission / reception power based on predicted power consumption of the power load, predicted generated power of the power generation device, and capacity of the power storage device;
A communication unit that receives information on the adjusted power to be adjusted with respect to the transmission / reception power as a request on the power system side;
A charge / discharge control unit for controlling charge / discharge of the power storage device,
The predicted value providing unit includes the power storage device,
(1) The capacity for private supply and demand related to the difference between the predicted power consumption, the predicted generated power, and the predicted transmitted / received power;
(2) an adjustment capacity relating to the adjustment;
Calculating the predicted transmission / reception power as having each of the following, and determining whether or not adjustment is possible based on the information related to the adjusted power,
The communication unit transmits the determined result to the power system side,
The charge / discharge control unit is a power control device that controls charge / discharge of the power storage device according to the determination. The predicted value providing unit calculates an adjustable power per unit time that can be adjusted when a request is received from the power system side, assuming that the power storage device has the private supply and demand capacity and the adjustment capacity individually. And
The communication unit provides the calculated predicted transmission / reception power and adjustable power to the power system side, and based on the provided predicted transmission / reception power and adjustable power, target adjustment for each unit time related to the adjusted power Receiving power,
The charge / discharge control unit determines a target charge / discharge power per unit time according to the request, manages charge / discharge according to the target charge / discharge power as charge / discharge related to the adjustment capacity,
The power control device according to claim 1, wherein the power consumption of the power load, the generated power of the power generation device, and the difference of the predicted transmission / reception power per unit time are managed as charge / discharge power related to the private supply / demand capacity.   The power control apparatus according to claim 1, wherein each of the capacity for private supply and demand and the capacity for adjustment is a capacity having a predetermined size.   The power control according to any one of claims 1 to 3, wherein the charge / discharge control unit performs control so as to perform charge / discharge from the adjustment capacity in preference to a time zone in which the predicted transmission / reception power is large. apparatus. The unit consumer power system is connected to the power system side so that power can be accommodated with at least one other unit customer power system,
The communication unit transmits and receives information to and from an external power control device that controls other unit consumer power systems,
The charge / discharge control unit gives priority to a time zone in which the transmission / reception power from the power system side, which is the sum of the predicted transmission / reception power of the other unit consumer power system and the own predicted transmission / reception power, is large, for the adjustment The power control apparatus according to any one of claims 1 to 3, which performs control so as to discharge from the capacity. An error storage unit for storing a history of errors between the predicted transmission / reception power calculated by the prediction value providing unit and the actual transmission / reception power;
The power control apparatus according to claim 1, wherein the predicted value providing unit determines the adjusted power including charge / discharge power that can handle the error.   The prediction value providing unit, after receiving the request, determines charge / discharge power related to the capacity for private supply and demand, and then allocates a remaining capacity that can be used by the power storage device to the adjustment capacity. 2. The power control apparatus according to 2. An error storage unit for storing a history of errors between the predicted transmission / reception power calculated by the prediction value providing unit and the actual transmission / reception power;
The power control apparatus according to claim 7, wherein the predicted value providing unit determines charge / discharge power related to the private supply / demand capacity including charge / discharge power that can handle the error. The unit consumer power system is connected to the power system side so that power can be accommodated with at least one other unit customer power system,
The communication unit transmits and receives information to and from an external power control device that controls other unit consumer power systems,
The charge / discharge control unit may allow the adjustment capacity to be accommodated in another unit consumer power system when there is another unit customer power system that has a margin in the adjustment capacity and cannot respond to the request. Item 4. The power control apparatus according to any one of Items 1 to 3. A method for controlling a unit customer power system including a power load, a power generation device and a power storage device using renewable energy, and controlling transmission / reception power from the power system, the computer comprising:
A predicted value providing step of calculating predicted power transmission / reception power based on predicted power consumption of the power load, predicted power generation power of the power generation device, and capacity of the power storage device;
Receiving information related to the adjusted power to be adjusted with respect to the transmission / reception power as a request on the power system side;
An adjustment determination step of determining whether or not adjustment is possible or at least one of adjustable power based on the information related to the adjusted power and transmitting to the power system side;
Controlling charging and discharging of the power storage device according to the determination,
In each of the predicted value providing step and the adjustment determining step, the power storage device
(1) The capacity for private supply and demand related to the difference between the power consumption of the power load, the generated power of the power generation device and the predicted transmission / reception power,
(2) an adjustment capacity relating to the adjustment;
Power control method to be executed as having individually. A program for managing a unit consumer power system including an electric power load, a power generation device and a power storage device using renewable energy, and controlling transmission / reception power from the power system, the processing to be executed by the computer,
A predicted value providing process for calculating predicted power transmission / reception power based on predicted power consumption of the power load, predicted power generation power of the power generation device, and capacity of the power storage device;
A process of receiving information on the adjusted power to be adjusted with respect to the transmission / reception power as a request on the power system side;
An adjustment determination process for determining whether or not adjustment is possible or at least one of adjustable power based on the information related to the adjusted power, and transmitting to the power system side;
Processing to control charging and discharging of the power storage device according to the determination,
In both the predicted value providing process and the adjustment determining process, the power storage device
(1) The capacity for private supply and demand related to the difference between the power consumption of the power load, the generated power of the power generation device and the predicted transmission / reception power,
(2) an adjustment capacity relating to the adjustment;
Is a power control program for executing the processing as if it has individually.