JP2016015857A - Electric power control system and electric power controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric power control system which enables the decrease in the basic charge of an electricity charge decided by an amount of peak power supplied to a user.SOLUTION: An electric power control system comprises: a server; a HEMS controller; and a power conditioner. The server outputs predicted data determined by prediction of a change of power consumption with time of a facility supplied with an electric power based on a past power consumption record. The HEMS controller calculates, based on the predicted data, a sum total of amounts of electric power consumed over an upper limit set value for a time zone in which an electric power supplied to the facility from a system exceeds the upper limit set value. The power conditioner ensures an electric power corresponding to a result of the calculation in a storage battery in advance, and has the storage battery charged by the ensured power storage capacity. If a power consumption of the facility is over the upper limit set value, the power conditioner supplies to the facility with an electric power of the power storage capacity ensured in the storage battery so that an upper limit of an electric power supplied to the facility from a system is up to the upper limit set value.

Description

  The present disclosure relates to a technique for controlling power supplied to a facility such as a house.

  In recent years, for example, a system such as a HEMS (Home Energy Management System) is becoming widespread in order to control energy consumption of consumers who receive power supply. For example, a storage battery or solar cell is installed in a customer's facility, and the power conditioner controls the supply of power from the grid to the facility, charging / discharging of the storage battery, the supply of power generated by the solar cell to the facility, or power sale To do. As a result, it is possible for consumers to reduce the consumption of power supplied from the grid and to reduce the electricity bill, and for power supply companies (electric power companies) that have power plants and substations to level the load. To stabilize the supply of power.

  As a technique for reducing the electric power charge, for example, Japanese Patent Application Laid-Open No. 2004-48982 discloses that a secondary battery is charged during a time zone in which the electric energy charge is relatively inexpensive, and discharged from the secondary battery outside the time zone. The technology is described. Thereby, the contract surplus of the power usage contract can be suppressed, the change of the contract power can be avoided, and the power charge can be reduced. Japanese Patent Laid-Open No. 2014-107950 predicts a peak of power consumption, and when it is predicted that there are a plurality of peaks to which power is to be supplied, the storage battery is charged in a time zone between the plurality of peaks. The technology for performing the control is described.

Japanese Patent Laid-Open No. 2004-48982 JP 2014-107950 A

  The power charge is composed of, for example, a basic charge determined based on contract power and a power charge determined according to the amount of power used. Although the technology described in Patent Document 1 reduces the electricity charge by charging the storage battery in a time zone where the electricity charge is relatively inexpensive, another technique for further reducing the electricity charge is required. Yes. Further, the technique described in Patent Document 2 predicts the peak of power consumption, and when it is predicted that there are a plurality of peaks to which power is to be supplied, the storage battery is charged in a time zone between the plurality of peaks. To do. However, the unit price of electricity charges is not always cheap in the time zone between a plurality of peaks. Moreover, there exists a possibility of charging exceeding the electric energy which peak cut requires.

  A power control system according to one embodiment is for controlling the supply of power to a facility. The power control system is charged with the supply of electric power, and a storage battery for supplying the charged electric power to the facility by discharging, and a storage unit for storing prediction data that predicts a temporal change in the power consumption of the facility Based on the prediction data, the total power consumed exceeding the upper limit set value is calculated for the time period in which the power consumption is predicted to exceed the upper limit set value of power supplied from the grid to the facility. Charge control means for storing power in the storage battery before the time period in which the power consumption is predicted to exceed the upper limit set value, and the upper limit of power supplied from the grid to the facility up to the upper limit set value. And a supply control means for supplying the power stored in the storage battery to the facility when the power consumption of the facility exceeds the upper limit set value.

  According to another embodiment, a power control apparatus for controlling the supply of power to a facility is provided. The power control device is charged by receiving power supply, and charging control means for controlling the charging of the storage battery for supplying the charged power to the facility by discharging, and the prediction predicting the time change of the power consumption of the facility Storage means for storing data and supply control means for controlling the supply of power from the storage battery to the facility are provided. Based on the prediction data, the charge control means calculates the total amount of power consumed exceeding the upper limit set value in the time zone where power consumption is predicted to exceed the upper limit set value of power supplied from the grid to the facility. Then, the calculated amount of power is stored in the storage battery before the time period in which the power consumption is predicted to exceed the upper limit set value. The supply control means supplies the power stored in the storage battery to the facility when the power consumption of the facility exceeds the upper limit set value so that the upper limit of the power supplied from the system to the facility is up to the upper limit set value.

  The basic charge of the power charge may be determined by the magnitude of peak power supplied to the consumer. Therefore, the electric power charge can be further reduced by further reducing the peak power supplied to the customer's facility. According to the one embodiment, power is supplied from the grid and the storage battery to the facility so that the storage battery is charged according to the upper limit set value, and the upper limit of the power supplied from the grid is set to the upper limit set value. For this reason, the peak power supplied to the facility can be kept at the size determined by the upper limit set value, and the power charge can be further reduced by further reducing the peak power.

  The above and other objects, features, aspects and advantages of the present invention will become apparent from the following detailed description of the present invention taken in conjunction with the accompanying drawings.

1 is a block diagram schematically showing a configuration of a power control system 1 according to a first embodiment. 2 is a block diagram illustrating a configuration of a server 100. FIG. 2 is a block diagram showing a configuration of a HEMS controller 700. FIG. 3 is a diagram illustrating a data structure of power consumption prediction data 162 stored in the server 100. FIG. It is a figure which shows the prediction result which predicted the time change of the power consumption shown by the power consumption prediction data 162. FIG. It is a figure which shows the electrical storage capacity R (n) ensured beforehand by the storage battery 830. FIG. 6 is a flowchart showing processing for controlling charging / discharging of storage battery 830 so that the power supplied from the grid does not exceed the upper limit set value, by HEMS controller 700 of the first embodiment. In Embodiment 2, it is a figure which shows the power consumption prediction data 162 which estimated the time change of power consumption, and the electrical storage capacity ensured in the storage battery 830. FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

<Embodiment 1>
FIG. 1 is a block diagram schematically showing the configuration of the power control system 1 of the first embodiment. With reference to FIG. 1, a power control system 1 includes a server 100, a broadband router 600, and a HEMS controller 700. Each device such as the broadband router 600 and the server 100 is connected to the Internet 900.

  The broadband router 600 and the HEMS controller 700 are arranged in the building. In the building, a solar cell module 810 including a plurality of solar cell modules is arranged on an outdoor roof portion. A power conditioner 820 and a storage battery 830 are also disposed outdoors. In the building, a distribution board 850, a multi-energy monitor 860, a multi-circuit CT (Current Transformer) sensor 870, and a plurality of home appliances (such as an air conditioner 801, an air purifier 802, a refrigerator 803, and a washing machine 804) are provided. A home appliance 800 including a tap 880 is arranged.

  The server 100 is a computer system having a large-capacity storage device, acquires weather data, actual power consumption values of each building, etc., predicts power consumption of each building, and solar cells installed in each building. Calculate the predicted power generation amount of the module.

  The CT sensor 870 measures the power consumption of the installation target device, and transmits the measured power consumption data to the HEMS controller 700. In Embodiment 1, CT sensor 870 can be connected to the main breaker and branch breaker of distribution board 850. When the CT sensor 870 is connected to the main breaker of the distribution board 850, the CT sensor 870 measures the power consumption of the entire building. Further, if the branch breaker corresponds to the entire room, the CT sensor 870 measures the power consumption of the entire room by connecting the CT sensor 870 to the branch breaker of the distribution board 850.

  The tap 880 is a power consumption measuring device that measures the power consumption of the home appliance 800, and transmits the measurement result of the power consumption to the HEMS controller 700 by wireless communication. The tap 880 includes a plug (not shown) and connects to an outlet in the building. Each household electrical appliance connected to the tap 880 (for example, an air conditioner 801, an air purifier 802, a refrigerator 803, a washing machine 804, etc.) feeds power from the distribution board 850 by connecting the tap 880 and an outlet. Is done.

  The broadband router 600 is connected to the Internet 900 and has a wireless local area network (LAN) function corresponding to a standard such as IEEE (Institute of Electrical and Electronic Engineers) 802.11, and performs wireless communication with other communication devices. Do. The broadband router 600 is connected to other communication devices by wire corresponding to the LAN standard, and is connected to the HEMS controller 700 and the multi-energy monitor 860 by wire. The power conditioner 820, the multi-energy monitor 860, the broadband router 600, and the HEMS controller 700 are connected by wire and can communicate with each other.

  The HEMS controller 700 is connected to the broadband router 600 by a wired LAN. The HEMS controller 700 has a wireless communication function. For example, the HEMS controller 700 wirelessly communicates with devices such as the CT sensor 870 and the tap 880, and from these devices, the measurement result of the power consumption of each device and the power consumption of the entire building. Receive and store the measurement results. The HEMS controller 700 transmits the measurement result of the power consumption of each device and the measurement result of the power consumption of the entire building to the server 100 by the broadband router 600. Further, the HEMS controller 700 transmits the measurement results of the power consumption to the multi-energy monitor 860 via the broadband router 600 in order to visualize the power consumption of each device and the power consumption of the entire building.

  The multi-energy monitor 860 is a monitor device for displaying the operation status of a plurality of energy systems such as a solar power generation system and a storage battery system, and enabling the user to easily control the operation status of various devices. is there. The multi-energy monitor 860 is connected to the power conditioner 820.

  A storage battery 830 and a solar cell module 810 are connected to the power conditioner 820. The power conditioner 820 supplies power from the grid to the distribution board 850 of the building. The power conditioner 820 has a function of converting the DC power generated by the solar cell module 810 into AC power that can be used in the building, and converts the power generated by the solar cell module 810 into the distribution board of the building. 850 or the storage battery 830 is supplied, and the electric power generated by the solar cell module 810 is sold to the outside through a watt-hour meter. Further, the power conditioner 820 controls charging to the storage battery 830 and discharging from the storage battery 830.

  As described above, the HEMS controller 700 receives the measurement result of power consumption from each device in the building, and transmits the received measurement result to the server 100 via the broadband router 600. The server 100 receives the measurement result of the power consumption of the building from the HEMS controller 700 via the Internet 900, and outputs the predicted value of the power consumption of the building based on the past power consumption history by calculation. The server 100 transmits the predicted power consumption value of the building to the HEMS controller 700 via the Internet 900.

  The HEMS controller 700 receives the prediction data in which the time change of the power consumption of the building is predicted from the server 100 via the Internet 900, and stores the received prediction data. The HEMS controller 700 sets an upper limit of power supplied from the system to the building by the power conditioner 820. The HEMS controller 700 specifies a time zone in which the power consumption is predicted to exceed the upper limit setting value of the power supplied to the building, for example, in the prediction data of the power consumption for one day. The HEMS controller 700 is predicted to be consumed beyond the upper limit set value by calculating the difference between the power consumption indicated in the prediction data and the upper limit set value in these specified time zones. Calculate the total power.

  The HEMS controller 700 can control the operation of the power conditioner 820 via the broadband router 600 and the multi-energy monitor 860. The HEMS controller 700 sets the power corresponding to the calculation result (power amount) of the total power predicted to be consumed exceeding the upper limit set value, and sets the upper limit power consumption setting value in the power consumption prediction data. The battery 830 is charged by the power conditioner 820 before the time period predicted to exceed. In accordance with a control signal from the HEMS controller 700, the power conditioner 820 secures a storage capacity corresponding to the upper limit set value in the storage battery 830, and generates electric power from the grid or the solar cell module 810 up to the reserved storage capacity. Is supplied to the storage battery 830. For example, the power conditioner 820 is predicted to be consumed in a predetermined time (for example, a midnight time zone where the power rate is relatively low) exceeding the upper limit set value in the power consumption prediction data. One day's worth of power corresponding to the amount of power is stored in the storage battery 830.

  The power conditioner 820 compares the power consumption of the building with the upper limit set value, and when the power supplied from the grid to the building reaches the upper limit set value, the power conditioner 820 uses the power stored in the storage battery 830 to Supply to distribution board 850. In this way, the power supplied from the grid to the building does not exceed the upper limit setting value (the upper limit of the power supplied from the grid to the building is set to the upper limit setting value). The na 820 can supply power stored in the storage battery 830 to the distribution board 850 of the building. In addition, the power conditioner 820 discharges the power stored in the storage battery 830 in advance for the time zone in which the power consumption is predicted to exceed the upper limit set value in the power consumption prediction data, according to the control of the HEMS controller 700. Then, it may be supplied to the distribution board 850.

<Configuration of Server 100>
FIG. 2 is a block diagram illustrating the configuration of the server 100. Referring to FIG. 2, server 100 includes a communication unit 102, a storage unit 106, and a control unit 107.

  The communication unit 102 is a communication interface that performs modulation / demodulation processing for the server 100 to transmit and receive signals to and from other communication devices.

  The storage unit 106 includes a flash memory, an HDD (Hard Disk Drive), a RAM (Random Access Memory), and the like, stores a program used by the server 100, and accumulates various data used by the server 100. In one aspect, the storage unit 106 stores power consumption history data 161 and power consumption prediction data 162. The power consumption history data 161 is data indicating a history of power consumption for each of a plurality of facilities managed by the server 100. The power consumption history data 161 indicates the history of the power consumption of the entire facility of each facility, the power consumption of the home appliances installed in each facility, and the like. The power consumption prediction data 162 is data in which the server 100 predicts a temporal change in power consumption of each facility, which is calculated by calculation based on the past actual power consumption values indicated in the power consumption history data 161.

  The control unit 107 controls the operation of the server 100 by reading and executing a control program stored in the storage unit 106. The control unit 107 is realized by a plurality of processors, for example. The control unit 107 functions as a power consumption prediction unit 171 and a communication control unit 172 by operating according to a program.

  The power consumption prediction unit 171 predicts temporal changes in the power consumption of these facilities based on the power consumption of the facilities of each facility received from the HEMS controller 700 and the actual power consumption values of the devices installed in each facility. The calculated power consumption prediction data 162 is calculated. As a method for predicting power consumption, for example, (i) a certain period in the past (for example, actual value of power consumption for the past three weeks on the prediction target day or actual value of power consumption for the past week) By obtaining the average value of the power consumption history, it can be output as a predicted value of power consumption. In addition, (ii) the power consumption trend may differ depending on the day of the week, so the average value of the power consumption history is calculated by referring to the power consumption history of the same day of the week as the prediction target day. The predicted power value can be output. (Iii) Since the tendency of power consumption may differ depending on the weather, the weather conditions similar to the weather (temperature, humidity, air volume, etc.) of the forecasted day in the past power consumption history for a certain period of time It is also possible to output the predicted value of power consumption by referring to the power consumption history of the day and calculating the average value of the power consumption of these days. Moreover, it is good also as outputting the predicted value of power consumption with the combination of these (i)-(iii).

  The communication control unit 172 controls processing in which the server 100 communicates with other communication devices via the Internet 900. For example, the communication control unit 172 receives the measurement result of the power consumption of each facility from the HEMS controller 700 installed in each facility and stores it as the power consumption history data 161. In addition, the communication control unit 172 transmits the power consumption prediction data 162 to the HEMS controller 700 of each facility.

<Configuration of HEMS Controller 700>
FIG. 3 is a block diagram showing a configuration of the HEMS controller 700. The HEMS controller 700 receives prediction data (power consumption prediction data 162) of power consumption of the entire building from the server 100 and stores it as power consumption prediction data 741, and stores the power consumption prediction data 741 and the peak power upper limit setting value 742. With reference to this, the amount of power to be stored in storage battery 830 is determined, and charging and discharging of storage battery 830 are executed by power conditioner 820.

  Referring to FIG. 3, HEMS controller 700 includes an antenna 701, a wireless communication unit 702, an operation receiving unit 703, a storage unit 704, a light emitting unit 705, a wired communication unit 706, and a control unit 707. .

  The antenna 701 radiates a signal emitted from the HEMS controller 700 as a radio wave. The antenna 701 receives a radio wave from the space and gives a reception signal to the wireless communication unit 702. The wireless communication unit 702 is a communication interface that performs modulation / demodulation processing and the like for transmitting and receiving signals in order for the HEMS controller 700 to wirelessly communicate with other communication devices. The operation accepting unit 703 is configured by an operation member such as a button for accepting an input operation, for example. The operation accepting unit 703 accepts a user input operation and outputs the accepted input operation to the control unit 707.

  The storage unit 704 includes a flash memory, a RAM, and the like, and stores programs and data used by the HEMS controller 700. In one aspect, the storage unit 704 stores power consumption prediction data 741 and a peak power upper limit setting value 742. The power consumption prediction data 741 is prediction data predicted by the HEMS controller 700 received from the server 100 over time of the power consumption of the facility (building) where the HEMS controller 700 is installed. The peak power upper limit setting value 742 indicates an upper limit setting value of power supplied from the system by the power conditioner 820 to the facility (building) where the HEMS controller 700 is installed. The peak power upper limit set value 742 may be designated by the user. For example, when the user operates the multi-energy monitor 860, the multi-energy monitor 860 accepts designation of the upper limit setting value, and the HEMS controller 700 receives the accepted upper limit setting value from the multi-energy monitor 860. The HEMS controller 700 updates the peak power upper limit setting value 742 based on the upper limit setting value specified by the user. The specification of the peak power upper limit setting value 742 by the user may be accepted by various devices such as the HEMS controller 700.

  The wired communication unit 706 is a communication interface that performs modulation / demodulation processing for the HEMS controller 700 to communicate with other communication devices by wire. The HEMS controller 700 is connected to the broadband router 600 by a wired communication unit 706, and communicates with communication devices such as the multi-energy monitor 860, the power conditioner 820, and the server 100 via the broadband router 600.

  The control unit 707 controls the operation of the HEMS controller 700 by reading and executing a control program stored in the storage unit 704. The control unit 707 is realized by a processor. The control unit 707 operates as a communication control unit 771, a charging control unit 772, a supply control unit 773, and a peak power designation receiving unit 774 by operating according to a program.

  The communication control unit 771 controls communication processing by the HEMS controller 700. For example, the communication control unit 771 communicates with devices in the building such as the multi-circuit CT sensor 870 and the tap 880, receives power consumption data from these devices, and receives the received power consumption data to the server 100. Processing to transmit, processing to receive prediction data of power consumption of the entire building from the server 100, and the like are performed.

  Based on the power consumption prediction data 741, the charging control unit 772 specifies a time zone in which the predicted power consumption value is predicted to exceed the upper limit set value indicated by the peak power upper limit set value 742, and the specified time zone The total power that is expected to be consumed exceeding the upper limit set value is calculated. The charging control unit 772 stores the storage battery in the power conditioner 820 so that the power of the amount of power calculated in this way is stored in the storage battery 830 in advance before the time zone in which the power consumption is predicted to exceed the upper limit set value. Instruct charging of 830.

  The supply control unit 773 transmits an instruction to the power conditioner 820 so that the upper limit of the power supplied from the system to the distribution board 850 of the building is the upper limit set value indicated by the peak power upper limit set value 742. The power conditioner 820 receives the upper limit set value from the HEMS controller 700 and supplies the distribution board 850 power from the system so that the power supplied from the system to the distribution board 850 of the building does not exceed the upper limit set value. The power stored in the storage battery 830 is supplied to the distribution board 850 in the building when there is a possibility that the power consumption supplied to the distribution board 850 exceeds the upper limit set value. That is, the power conditioner 820 supplies power stored in the storage battery 830 and power from the grid to the distribution board 850 of the building when the power consumption consumed in the building exceeds the upper limit set value. The power supplied from the grid to the building should not exceed the upper limit set value.

  The peak power designation accepting unit 774 performs a process of accepting designation of an upper limit of power supplied from the grid to the facility (upper limit of peak power). For example, the peak power designation accepting unit 774 communicates with the multi-energy monitor 860, and the multi-energy monitor 860 accepts designation of the upper limit of peak power from the user and receives the accepted upper limit setting value from the multi-energy monitor 860. Then, the peak power upper limit set value 742 is stored in the storage unit 704.

<Data structure>
FIG. 4 is a diagram illustrating a data structure of the power consumption prediction data 162 stored in the server 100.

  With reference to FIG. 4, one record of the power consumption prediction data 162 associates the facility identification information 162A, the prediction time 162B, the target device 162C, and the prediction power consumption 162D. The facility identification information 162A is information for identifying each facility managed by the server 100. The predicted time 162B indicates a time zone in which the power consumption of each facility is predicted. For example, the server 100 outputs a predicted value of power consumption of each facility by calculation every certain period such as an interval of 15 minutes.

  The target device 162C indicates a target whose power consumption is predicted in the facility indicated by the facility identification information 162A. For example, as the target device 162C, a target “whole facility” indicating the predicted power consumption value of the entire facility indicated by the facility identification information 162A, and a target “home appliance” indicating the device itself that predicts power consumption in each facility 1 "etc. The predicted power consumption 162D indicates the magnitude of power consumption predicted for the entire facility and each device at the prediction time indicated by the prediction time 162B.

  FIG. 5 is a diagram illustrating a prediction result obtained by predicting a temporal change in power consumption, which is indicated by the power consumption prediction data 162. The HEMS controller 700 receives the power consumption prediction data 162 from the server 100 and stores it as power consumption prediction data 741. In FIG. 5, the prediction result of the time change of the power consumption of a certain facility is shown, the horizontal axis indicates the time, and the vertical axis indicates the power consumption predicted at each time. The example in FIG. 5 shows the prediction result of power consumption for one day, and the power consumption prediction data 162 shows the prediction result of power consumption for each period from time t11 to time t26. In the power consumption prediction data 162, the power consumption consumed in the facility is predicted to reach the peak power Ep (W) at time t24. Further, when the upper limit set value (peak power upper limit set value 742) of power supplied from the system to the facility is set to the upper limit set value Eth (W), the power consumption prediction data 162 includes time t16, time t23, and It is predicted that power consumption exceeding the upper limit set value will be reached at time t24.

  Here, at time t16, the difference between the power consumption and the upper limit set value (power consumed exceeding the upper limit set value) is defined as power S1 (t) (W), and at time t23, the power consumption and the upper limit set value are Is the power S2 (t) (W), and at time t24, the difference between the power consumption and the upper limit set value is the power S3 (t) (W). In this case, in the period from time t11 to time t26, the total amount of power during the period in which the power consumption is equal to or higher than the upper limit set value Eth (W) is the sum Sp (t) = ΣSn (t) = S1 (t) + S2 ( t) + S3 (t). In this way, the charge control unit 772 of the HEMS controller 700 calculates the sum Sp (t).

  The HEMS controller 700 causes the storage battery 830 to charge at least the power corresponding to the calculated total sum Sp (t) before the time when the power consumption is predicted to exceed the upper limit set value Eth. In the description of this embodiment, the HEMS controller 700 causes the storage battery 830 to secure a storage capacity obtained by adding the margin Δr (W) to the power corresponding to the sum Sp (t). The power storage status of the storage battery 830 is managed by, for example, the power conditioner 820. The power conditioner 820 manages the storage capacity that can be stored in the storage battery 830 in which application it is used, for example, by a flag or the like. Among the electric power stored in the storage battery 830, the power conditioner 820 uses the electric power of the storage capacity R (n) = Sp (t) + Δr secured in the storage battery 830 in order to cut the upper limit set value Eth in the house. The storage battery 830 is charged before the time t16 when the power consumption exceeds the upper limit set value Eth. In response to the instruction transmitted from the HEMS controller 700, the power conditioner 820 supplies the storage capacity power secured in the storage battery 830 to cut the upper limit set value Eth to the distribution board 850 of the building.

  FIG. 6 is a diagram showing the storage capacity R (n) secured in advance in the storage battery 830. As shown in FIG. 6, the power conditioner 820 has a storage capacity for cutting the peak power supplied to the building and the capacity reserved for normal operation of the power conditioner 820 among the storage battery capacity of the storage battery 830. R (n) is secured. 6 corresponds to FIG. 5 and shows an example in which the storage battery 830 secures the electric power of the storage capacity R (n) = Sp (t) + Δr. For example, when the time t11 to the time t26 indicate the prediction result of the power consumption for one day, the power conditioner 820 before the time t11 (before the start of the day), the storage capacity R ( The power of n) is stored in the storage battery 830. In addition, the power conditioner 820 stores power in the power conditioner 820 in a time zone before the time when the power consumption is predicted to exceed the upper limit set value Eth and in which the electricity bill is relatively inexpensive. It is good.

<Operation>
FIG. 7 is a flowchart illustrating processing in which the HEMS controller 700 according to Embodiment 1 controls charging / discharging of the storage battery 830 so that the power supplied from the system does not exceed the upper limit set value. The process illustrated in FIG. 7 is repeatedly executed by, for example, the HEMS controller 700 performing the process of step S701 on time.

  In step S701, the control unit 707 of the HEMS controller 700 requests the server 100 to transmit to the HEMS controller 700 the power consumption prediction data 162 in which the time change of the power consumption is predicted.

  In step S <b> 101, the control unit 107 of the server 100 transmits power consumption prediction data 162 output by the power consumption prediction unit 171 to the HEMS controller 700 in response to receiving the request.

  In step S <b> 703, the control unit 707 of the HEMS controller 700 receives the power consumption prediction data 162 from the server 100 and stores it in the storage unit 704 as power consumption prediction data 741. Based on the storage unit 704, the control unit 707 calculates the total amount Sp (t) of the amount of power during the period when the power consumption of the building is equal to or higher than the peak power upper limit set value 742.

  In step S705, the control unit 707 causes the storage battery 830 to reserve the storage capacity corresponding to the calculated power of the total sum Sp (t) in advance, and from the time zone in which the power consumption is predicted to exceed the peak power upper limit set value 742. An instruction is transmitted to the power conditioner 820 so that the storage battery 830 is charged before.

  In step S801, in response to the reception of the support, the power conditioner 820 has a margin in the total amount Sp (t) of the power amount before the time period in which the power consumption is predicted to exceed the peak power upper limit setting value 742. A storage capacity R (n) to which Δr is added is secured in the storage battery 830, and the storage battery 830 is stored.

<Summary of Embodiment 1>
By performing the processing described above, the power control system 1 allows the storage battery 830 to reserve the storage capacity in advance and store it, thereby setting the upper limit of the power supplied from the system to facilities such as buildings, It can be up to the upper limit set value. That is, the power supplied to the facility can be kept at a size determined by the upper limit set value. Therefore, when the electricity charge supplied to the consumer is composed of a basic charge determined by the magnitude of peak power and an electricity charge determined according to the amount of power used, The peak power can be reduced, and the basic charge out of the consumer's power charge can be reduced. In addition, for power companies that supply power, the peak power of each facility can be leveled to the level set by the upper limit setting value, and the power supply capacity at peak time is provided with sufficient capacity to supply power. It can be stabilized.

<Embodiment 2>
Next, a notification control system according to another embodiment will be described. In the first embodiment, for example, the HEMS controller 700 calculates the total amount Sp (t) of the electric energy during a period when the predicted value of power consumption exceeds the upper limit set value based on the prediction result of power consumption for one day. The storage battery 830 secures power corresponding to the calculated total sum Sp (t) (the amount of power obtained by adding the margin Δr). In addition, in the predicted power consumption data, the difference between the predicted power consumption value and the upper limit set value is calculated for each time zone in which the power consumption exceeds the upper limit set value (power S1 (t), power S2 (t) , Electric power S3 (t)), electric power corresponding to each calculated electric power amount may be stored in the storage battery 830 before each time zone in which the electric power consumption exceeds the upper limit set value.

  FIG. 8 is a diagram showing the power consumption prediction data 162 in which the time change of power consumption is predicted and the storage capacity secured in the storage battery 830 in the second embodiment.

  As shown in FIG. 8, the HEMS controller 700 calculates the power S1 (t) (W) corresponding to the difference between the power consumption and the upper limit set value at time t16, and the power consumption and the upper limit set value at time t23. The power S2 (t) (W) corresponding to the difference is calculated, and the power S3 (t) (W) corresponding to the difference between the power consumption and the upper limit setting value is calculated at time t24. The HEMS controller 700 causes the storage battery 830 to store power corresponding to the power S1 (t) consumed exceeding the upper limit set value at time t16 before the time t16. In FIG. 8, the HEMS controller 700 ensures the storage battery 830 has a storage capacity R1 (n) = S1 (t) + Δr obtained by adding a margin Δr to the power S1 (t) before time t16. It is assumed that the power consumption of the facility exceeds the upper limit set value at time t16. In this case, the power conditioner 820 supplies the electric power stored in the storage battery 830 to the distribution board 850 of the facility, thereby keeping the electric power supplied from the system to the facility at the size of the upper limit set value. That is, the HEMS controller 700 supplies the power consumed by the facility exceeding the upper limit set value to the facility by the power secured in the storage battery 830.

  According to the power consumption prediction data 162, it is predicted that power will be consumed exceeding the upper limit set value at time t23 and time t24. The HEMS controller 700 stores the power corresponding to the sum of the power S2 (t) (W) and the power S3 (t) (W) in the storage battery 830 before time t23. In FIG. 8, the HEMS controller 700 has a storage capacity R2 (t) = S2 (t) + S3 (t) obtained by adding a margin Δr to the sum of the power S2 (t) and the power S3 (t) before the time t23. ) + Δr is secured in the storage battery 830. It is assumed that the power consumption of the facility exceeds the upper limit set value at time t23 and time t24. In this case, the power conditioner 820 supplies the electric power stored in the storage battery 830 to the distribution board 850 of the facility, thereby keeping the electric power supplied from the system to the facility at the size of the upper limit set value.

<Summary of Embodiment 2>
According to the power control system of the second embodiment, prior to each time period in which the power consumption exceeds the upper limit set value, the storage battery 830 stores power corresponding to the power consumed exceeding the upper limit set value in each time slot. ing. That is, in the storage battery 830, the storage capacity to be secured in the storage battery 830 in order to keep the power supplied from the system to the facility at the upper limit set value is secured for each time zone, so the storage capacity to be secured in the storage battery 830 is as much as possible. The power storage capacity secured for normal operation of the power conditioner 820 can be made relatively large. Therefore, it is possible to maintain a high degree of freedom in controlling the power conditioner 820, such as power supply and power sale to the facility according to the amount of power generated by the solar cell module 810.

  In the above embodiment, as described with reference to FIG. 7, the server 100 outputs the predicted power consumption data of each facility by the power consumption prediction unit 171, and the HEMS controller 700 includes the charge control unit 772 and the supply control unit. 773, based on the power consumption prediction data 741, the calculation of the amount of power to be stored in the storage battery 830 so as not to exceed the peak power upper limit setting value 742 indicating the setting of the upper limit of power supplied from the system to the facility, and the storage battery The power storage to 830 is controlled. In addition, the processing in step S703 and the processing in step S705 may be performed by the server 100 or may be performed by other devices.

  The power control system according to the present embodiment is realized by a processor and a program executed thereon. The program for realizing the present embodiment is provided by transmission / reception using a network via a communication interface.

  The embodiment disclosed this time must be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  1 Power Control System, 100 Server, 600 Broadband Router, 700 HEMS Controller, 800 Home Appliance, 810 Solar Cell Module, 820 Power Conditioner, 830 Storage Battery, 850 Distribution Panel, 860 Multi Energy Monitor, 870 Multi-circuit CT Sensor, 880 Tap, 900 Internet.

Claims (5)

A power control system for controlling power supply to a facility,
A storage battery for receiving supply of power and being charged, and supplying the charged power to the facility by discharging;
Storage means for storing prediction data for predicting temporal changes in power consumption of the facility;
Based on the prediction data, the total power consumed exceeding the upper limit set value is calculated in a time zone in which the power consumption is predicted to exceed the upper limit set value of power supplied from the grid to the facility. Charge control means for storing the calculated amount of power in the storage battery before a time zone in which the power consumption is predicted to exceed the upper limit setting value;
When the power consumption of the facility exceeds the upper limit set value, the power stored in the storage battery is supplied to the facility so that the upper limit of power supplied from the grid to the facility is up to the upper limit set value. And a power control system.   The charging control means calculates a sum of differences between the predicted value of the power consumption and the upper limit set value for each time zone in which the power consumption exceeds the upper limit set value based on the prediction data, The power control system according to claim 1, wherein power of the amount of power calculated for the band is stored in the storage battery by charging before each time period.   The power control system according to claim 1, wherein the charge control unit includes a reception unit that receives designation of the upper limit set value. The storage means is configured to store an actual value of power consumption within a certain period in the facility as history data,
The power control system further includes:
Predicting means for outputting the prediction data by predicting the future power consumption of the facility based on the history data;
The power storage system according to any one of claims 1 to 3, wherein the storage unit is configured to store the prediction data output by the prediction unit. A power control device for controlling the supply of power to a facility,
Charging control means for controlling charging of a storage battery for charging the battery by supplying electric power and supplying the charged electric power to the facility by discharging;
Storage means for storing prediction data for predicting temporal changes in power consumption of the facility;
Supply control means for controlling the supply of power from the storage battery to the facility,
The charging control means is consumed exceeding the upper limit set value in a time zone in which the power consumption is predicted to exceed the upper limit set value of power supplied from the grid to the facility based on the prediction data. Calculating the total power, and storing the calculated amount of power in the storage battery prior to a time period in which the power consumption is predicted to exceed the upper limit set value,
The power supply means stores the power stored in the storage battery when the power consumption of the facility exceeds the upper limit set value so that the upper limit of power supplied from the grid to the facility is up to the upper limit set value. Is a power control device for supplying to the facility.

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