WO2017221411A1

WO2017221411A1 - Control device, power management system, charge/discharge control method, and program

Info

Publication number: WO2017221411A1
Application number: PCT/JP2016/068841
Authority: WO
Inventors: 諭司花井; 矢部　正明; 聡司峯澤; 遠藤　聡; 一郎丸山
Original assignee: 三菱電機株式会社
Priority date: 2016-06-24
Filing date: 2016-06-24
Publication date: 2017-12-28
Also published as: JP6664479B2; JPWO2017221411A1

Abstract

A control device (100) controls the charging and discharging of an electricity storage device (7) installed at a power demand place. In the control device (100), a predicted information storage means stores first predicted information predicted at a first time point and second predicted information predicted at a second time point after the first time point, said predicted information being an index of at least either power generated at the power demand place or power consumed at the power demand place. A charging and discharging control means controls the charging and discharging of the electricity storage device (7) at the first time point on the basis of the first predicted information and controls the charging and discharging of the electricity storage device (7) at the second time point on the basis of the second predicted information. A correction means corrects, before the second time point, the second predicted information stored in the predicted information storage means on the basis of the relationship between the first predicted information and actual information at the first time point.

Description

Control device, power management system, charge / discharge control method and program

The present invention relates to a control device, a power management system, a charge / discharge control method, and a program.

In recent years, with the spread of power storage devices such as storage batteries or electric vehicles, the number of cases where power storage devices are used in areas where power is demanded is increasing. A technique for controlling charging / discharging of a power storage device in such a power demand place in consideration of an electricity bill, weather, a living pattern of a resident, or the like is known.

For example, Patent Document 1 discloses a control device for an energy system that predicts the amount of power generated by a solar cell using weather forecast information and creates an operation plan for charging and discharging a storage battery using a prediction result. The control device disclosed in Patent Literature 1 calculates the cost when the charge / discharge amount of the storage battery is increased or decreased by one step when the error between the predicted value and the measured value of the power generation amount or the power demand amount is large, If it decreases, the command value of the charge / discharge amount of the storage battery is changed. Thereby, even if power generation amount or electric power demand amount fluctuates temporarily, charging / discharging of a storage battery can be controlled optimally.

JP 2005-143218 A

The control device disclosed in Patent Document 1 can correct the charge / discharge amount of the storage battery in real time so as to reduce the cost even when the power generation amount or the power demand amount is not predicted. However, Patent Document 1 does not disclose improving prediction accuracy. Therefore, it is desired to improve the accuracy of prediction and accurately control charging / discharging of the power storage device.

The present invention has been made to solve the above-described problems, and an object thereof is to provide a control device or the like that can accurately control charging / discharging of a power storage device.

In order to achieve the above object, a control device according to the present invention provides:
A control device for controlling charging / discharging of a power storage device in a power demand area,
First prediction information predicted at a first time point, which is prediction information of an index related to at least one of power generated in the power demand area or power consumed in the power demand area; Prediction information storage means for storing second prediction information predicted at a second time after the first time;
At the first time point, charge / discharge of the power storage device is controlled based on the first prediction information stored in the prediction information storage unit, and stored in the prediction information storage unit at the second time point. Charging / discharging control means for controlling charging / discharging of the power storage device based on the second predicted information,
A record information acquisition means for acquiring record information of the index at the first time point;
Correction means for correcting the second prediction information stored in the prediction information storage means based on the relationship between the first prediction information and the performance information before the second time point. .

In the present invention, the control device is prediction information of an index related to at least one of the power generated in the power demand area or the power consumed in the power demand area, and is predicted at the first time point. Prediction information storage means for storing the first prediction information and the second prediction information predicted at a second time after the first time is provided, and the first prediction information is stored before the second time. The second prediction information stored in the prediction information storage unit is corrected based on the relationship between the prediction information and the performance information at the first time point. Therefore, according to the present invention, charge / discharge of the power storage device can be accurately controlled.

1 is a diagram illustrating an overall configuration of a power management system according to a first embodiment. 2 is a block diagram illustrating a hardware configuration of a control device according to Embodiment 1. FIG. 3 is a block diagram illustrating a functional configuration of a storage unit in the control device according to Embodiment 1. FIG. 3 is a block diagram illustrating a functional configuration of a control unit in the control device according to Embodiment 1. FIG. It is a figure which shows the 1st example of the charging / discharging plan of an electrical storage apparatus. It is a figure which shows the 2nd example of the charging / discharging plan of an electrical storage apparatus. It is a figure which shows the 3rd example of the charging / discharging plan of an electrical storage apparatus. It is a figure which shows the 1st example of alerting | reporting by an alerting | reporting part. It is a figure which shows the 2nd alerting | reporting example by a alerting | reporting part. It is a flowchart which shows the flow of the charging / discharging plan process performed by the control apparatus which concerns on Embodiment 1. FIG. 6 is a block diagram illustrating a hardware configuration of a control device according to Embodiment 2. FIG. 6 is a block diagram illustrating a functional configuration of a storage unit in a control device according to Embodiment 2. FIG. 6 is a block diagram illustrating a functional configuration of a control unit in a control device according to Embodiment 2. FIG. It is a flowchart which shows the flow of the charging / discharging plan process performed by the control apparatus which concerns on Embodiment 2. FIG. It is a figure which shows roughly the whole structure of the power management system in a modification.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

(Embodiment 1)
FIG. 1 shows an overall configuration of a power management system 1000 according to Embodiment 1 of the present invention. The power management system 1000 is a so-called HEMS (Home Energy Management System) that manages power consumed in the house H. The house H is a so-called general residential building, and is a demand place (power demand place) of power supplied from the system power supply 4, the power generation device 5 and the power storage device 7. The house H is supplied with power from the system power supply 4 via the distribution board 2. The system power source 4 is a commercial power source for transferring power between the power company and the house H.

As shown in FIG. 1, a power management system 1000 includes a plurality of devices 1A, 1B, 1C,... That consume power, a power measurement device 3 that measures power, a power generation device 5 that generates power using sunlight, and a direct current. A power conversion device 6 that converts power between the power supply and the alternating current, a power storage device 7 that stores power, an input / output terminal 8 that is a user interface, a control device 100 that collectively manages the power management system 1000, Is provided.

Each of the plurality of devices 1A, 1B, 1C,... Is an electrical device such as a television, an air conditioner, a water heater, a refrigerator, an illuminator, a floor heating system, or an IH (Induction Heating) cooker. Each of the plurality of devices 1A, 1B, 1C,... Is installed in a house H (including its site), and via a power line branched by the distribution board 2, a system power source 4, a power generator 5, and a power storage device 7 is electrically connected. In the following, when each of the plurality of devices 1A, 1B, 1C,.

Each device 1 has a wireless communication interface, and communicates with the control device 100 via a wireless network built in the house H. This wireless network is, for example, a network conforming to ECHONET Lite. Each device 1 may be of a specification that is connected to this wireless network via an external communication adapter (not shown). Each device 1 changes the operating state in accordance with a control command from the control device 100. In addition, each device 1 responds to a request from the control device 100 and stores data (operating state data) that stores information indicating the device ID (Identification), the current time, and the current operating state over the wireless network. To the control device 100.

The power measuring device 3 measures the power transmitted through each of the power lines (power supply paths) arranged in the house H. More specifically, the power measuring device 3 includes a power line disposed between the system power supply 4 and the distribution board 2, a power line disposed between the power conversion device 6 and the distribution board 2, and a power Power transmitted between the conversion device 6 and the power storage device 7 and the power line disposed between the distribution board 2 and each of the plurality of devices 1A, 1B, 1C,... Measure. The power measuring device 3 is connected to each of CT (Current Transformer) 1 to CT6 connected to each of these power lines via a communication line. CT1 to CT6 are sensors for measuring an alternating current.

The power measuring device 3 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), a communication interface, a readable / writable nonvolatile semiconductor memory, and the like, although not shown. The power measuring device 3 includes a wireless communication interface, and communicates with the control device 100 via the above-described wireless network built in the house H. The power measuring device 3 may be of a specification that is connected to this wireless network via an external communication adapter (not shown).

In response to a request from the control device 100, the power measurement device 3 generates measurement data that stores, as a measurement value, the value of power transmitted through each power line obtained by measurement, and transmits the measurement data to the control device 100. The transmitted measurement data also stores the device address of the power measurement device 3, the ID of the power line, the measurement time, and the like. Note that the power measurement device 3 may generate measurement data in which each measurement value is stored in a batch in response to a request from the control device 100 and transmit the measurement data to the control device 100.

The power generation device 5 is a distributed power source that is installed in the house H and is owned by a power consumer of the house H. The power generation device 5 generates power using natural energy, fossil fuel, fuel cell, or the like. Natural energy is, for example, sunlight or wind power. Below, it demonstrates taking the case where the electric power generating apparatus 5 is a solar power generation (PV: Photovoltaic) apparatus which generate | occur | produces with sunlight.

The power generation device 5 includes a PV panel, which is a polycrystalline silicon solar panel, for example. The PV panel is installed on the roof of the house H, and generates solar power by converting solar energy into electric energy. The power generation device 5 supplies the power generated by the PV panel to each device 1 or the system power supply 4 via the power conversion device 6.

When the amount of power generated by the power generation device 5 exceeds the total power consumption in the house H, surplus power is generated in the house H. When surplus power is generated, the power consumer of the house H can sell (sell) power to the electric utility by supplying the surplus power to the system power supply 4 as reverse power.

The power converter 6 is, for example, a power conditioner, and executes at least one of conversion between direct current and alternating current and voltage conversion. The power conversion device 6 receives supply of the power generated by the power generation device 5 and the power discharged from the power storage device 7, and outputs the supplied power to the distribution board 2. At that time, the power conversion device 6 converts the power supplied from the power generation device 5 or the power storage device 7 from direct current to alternating current so that it can be used in the house H, and outputs it. Further, the power conversion device 6 outputs the power supplied from the distribution board 2 to the power storage device 7 and charges the power storage device 7. In that case, the power converter device 6 converts the electric power supplied from the distribution board 2 from alternating current to direct current, and outputs it.

The power conversion device 6 includes a CPU, a ROM, a RAM, a communication interface, a readable / writable nonvolatile semiconductor memory, and the like, although not shown. In addition, the power conversion device 6 communicates with the control device 100 via the above-described wireless network constructed in the house H. The power conversion device 6 may be of a specification that is connected to this wireless network via an external communication adapter (not shown).

The power storage device 7 is a device that stores the power supplied from the power system 4 or the power generation device 5 in the premises of the house H. The power storage device 7 is a stationary storage battery or an electric vehicle (EV) installed in the site of the house H, and includes, for example, a nickel-cadmium battery, a nickel hydride battery, a lithium ion battery, or a lead storage battery. The power storage device 7 discharges the power stored in advance as DC power and supplies the device 1 as AC power via the power conversion device 6.

The power conversion device 6 includes an AC-DC converter that mutually converts AC power on the distribution board 2 side and DC power on the power storage device 7 side, a transformer that converts DC power voltage, and a power conversion device. A switching element is provided. The power conversion device 6 converts power when a high level signal is input to the switching element, and does not convert power when a low level signal is input to the switching element.

The power conversion device 6 acquires a charge / discharge control command for the power storage device 7 from the control device 100 via a wireless network. Then, power conversion device 6 determines whether or not to perform power conversion in accordance with the acquired control command, and causes power storage device 7 to charge or discharge. When power conversion is performed, the power storage device 7 is charged or discharged, and when power conversion is not performed, the power storage device 7 is not charged or discharged. Further, the power conversion device 6 monitors the charge amount of the power storage device 7 and notifies the control device 100 of the charge amount.

The input / output terminal 8 is, for example, a mobile device such as a smartphone, a tablet terminal, a remote controller, a mobile phone, or a notebook computer. The input / output terminal 8 includes an input device such as a push button, a touch panel, or a touch pad, and a display device such as an organic EL (Electro-Luminescence) display or a liquid crystal display. The input / output terminal 8 includes a communication interface, and communicates with the control device 100 in accordance with a known communication standard such as Wi-Fi (registered trademark), Wi-SUN (registered trademark), or wired LAN (Local Area Network). To do. The input / output terminal 8 receives an operation from the user and transmits information indicating the received operation content to the control device 100. Further, the input / output terminal 8 receives the information transmitted from the control device 100 and presented to the user, and displays the received information. Thus, the input / output terminal 8 plays a role as a user interface.

The control device 100 is an information collection unit that collects information transmitted from each device installed in the house H via a wireless network. As an example, the control device 100 is a HEMS controller that can control each device installed in the house H in an integrated manner. The control device 100 controls the plurality of devices 1A, 1B, 1C... And monitors the operating states of the plurality of devices 1A, 1B, 1C. Control device 100 controls charging / discharging of power storage device 7 via power conversion device 6. The control device 100 monitors the power consumed in the house H and displays the power consumption status via the input / output terminal 8.

Further, as shown in FIG. 1, the control device 100 is connected to the wide area network N. The wide area network N is, for example, the Internet and connects the server 10 and the control device 100 in at least one power consumer to relay information transmission / reception. The control device 100 communicates with the server 10 via the wide area network N.

The server 10 is a server for causing the power management system 1000 to function in cooperation with the control device 100, for example, a server that provides resources in cloud computing. The server 10 stores data necessary for the operation of the control device 100. For example, the server 10 acquires from the control device 100 and accumulates the measurement results obtained by the power measurement device 3, the operation state of the device 1 collected by the control device 100, and the like. Further, the server 10 stores weather information such as weather forecast, temperature, humidity, sunshine duration or solar radiation amount for each region. Furthermore, the server 10 stores the price of electric power sold / purchased with the system power supply 4 (trading unit price) for each time zone. The server 10 provides the stored data to the control device 100 in response to a request from the control device 100.

FIG. 2 shows a hardware configuration of the control device 100. As shown in FIG. 2, the control device 100 includes a control unit 21, a storage unit 22, a time measuring unit 23, an in-home communication unit 24, and an out-of-home communication unit 25. These units are connected via a bus 29.

The control unit 21 includes a CPU, a ROM, a RAM, and the like, although not shown. The CPU is also called a central processing unit, a central processing unit, a processor, a microprocessor, a microcomputer, a DSP (Digital Signal Processor), or the like. In the control unit 21, the CPU reads a program and data stored in the ROM, and performs overall control of the control device 100 using the RAM as a work area.

The storage unit 22 is a non-volatile semiconductor memory such as a flash memory, an EPROM (Erasable Programmable ROM) or an EEPROM (Electrically Erasable Programmable ROM), and serves as a so-called secondary storage device (auxiliary storage device). . The storage unit 22 stores various programs and data used by the control unit 21 to perform various processes, and various data generated or acquired by the control unit 21 performing various processes.

The timekeeping unit 23 includes a RTC (Real Time Clock) and is a time measuring device that keeps time while the power of the control device 100 is off.

The home communication unit 24 is an interface for communicating via the above-described wireless network constructed in the house H. The in-home communication unit 24 communicates with each of the devices 1, the power measurement device 3, and the power conversion device 6 through the wireless network under the control of the control unit 21. In addition, the in-home communication unit 24 communicates with the input / output terminal 8 via Wi-Fi (registered trademark), Wi-SUN (registered trademark), a wired LAN, or the like under the control of the control unit 21.

The external communication unit 25 is an interface for connecting to the wide area network N and communicating. The outside communication unit 25 communicates with the server 10 via the wide area network N. The out-of-home communication unit 25 acquires, for example, weather information and information related to the unit price of power purchase from the server 10 via the wide area network N.

Next, the functional configuration of the storage unit 22 will be described with reference to FIG. As shown in FIG. 3, the storage unit 22 functionally includes an equipment information storage unit 201, a prediction information storage unit 202, an alternative data storage unit 203, a performance information storage unit 204, a plan storage unit 205, Is provided. These are constructed in an appropriate storage area in the storage unit 22.

The facility information storage unit 201 stores facility information. The facility information is identification information and characteristic information of facilities in the house H such as each device 1, the power generation device 5 and the power storage device 7. The facility information storage unit 201 stores, for example, the power consumption characteristics of each device 1, the storage capacity of the power storage device 7 and the efficiency associated with charging / discharging, and the power generation efficiency of the power generation device 5 as the facility information. The facility information is acquired by either the wide area network N or a user input via the input / output terminal 8 and stored in advance in the facility information storage unit 201.

The prediction information storage unit 202 stores prediction information of an index related to at least one of the electric power generated in the house H and the electric power consumed in the house H. The index related to the power generated in the house H is an element that affects the amount of power generated by the power generation device 5, and specifically, information related to the power generation environment such as weather, sunshine duration or amount of solar radiation in the house H. including. The index related to the power consumed in the house H is an element that affects the power consumption in the house H. Specifically, information on the operating state of each device 1 in the house H, and the temperature or humidity The information regarding the usage environment of each apparatus 1 and the information regarding the price of the electric power traded with the system power supply 4 are included.

The prediction information storage unit 202 stores prediction information at a plurality of times in the future of indices related to power generated or consumed in such a house H. More specifically, the prediction information storage unit 202 stores prediction information such as weather, temperature, humidity, sunshine duration, or amount of solar radiation as prediction information related to the power generation environment and the usage environment. Further, the prediction information storage unit 202 stores schedule information such as a use schedule of each device 1 or a user's schedule as prediction information related to the operating state of each device 1. Furthermore, the prediction information storage unit 202 stores schedule information of a sales unit price that fluctuates according to a time zone, a season, or the like as schedule information regarding the price of electric power.

The prediction information is acquired by either the wide area network N or a user input via the input / output terminal 8 and stored in the prediction information storage unit 202 in advance. In addition, every time new prediction information is acquired, the prediction information stored in the prediction information storage unit 202 is updated. Of the prediction information stored in the prediction information storage unit 202, the prediction information predicted at the first time point at a plurality of future time points is referred to as first prediction information, and the first information after the first time point. The prediction information predicted at the time point 2 is referred to as second prediction information.

The alternative data storage unit 203 stores alternative data. The substitute data is data used as a substitute for the prediction information stored in the prediction information storage unit 202 when the prediction is lost. The alternative data storage unit 203 is, for example, as alternative data relating to the amount of solar radiation, among the record information stored in the result information storage unit 204, the data on a rainy day when the solar radiation amount is minimum and the day when the solar radiation amount is maximum Store the data. Further, the alternative data storage unit 203 stores data of the maximum value and the minimum value estimated at each time of each season as alternative data relating to the temperature or humidity. Such alternative data is acquired by at least one of user input via the input / output terminal 8, generation from the record information stored in the record information storage unit 204, and the wide area network N. Pre-stored in the alternative data storage unit 203.

The performance information storage unit 204 stores performance information for the prediction information stored in the prediction information storage unit 202. The performance information is information actually obtained at each time point when the prediction information is predicted with respect to the prediction information stored in the prediction information storage unit 202. In other words, the performance information includes, for example, the power generation environment and usage environment such as weather, temperature, humidity, sunshine duration or solar radiation, the price of power, and the operating state of each device 1 for which the prediction information is predicted. It is information indicating what actually happened at the time.

The performance information storage unit 204 further stores accuracy information regarding the accuracy of the prediction information stored in the prediction information storage unit 202. The accuracy information is an arbitrary value related to the prediction accuracy, and includes, for example, a ratio in which the prediction information coincides with or is close to the performance information for each condition in the past year.

The plan storage unit 205 stores a plan for charging / discharging by the power storage device 7. The charging / discharging plan is information that defines the timing of starting charging or discharging, the timing of ending charging or discharging, and the amount in the case of starting charging or discharging in a future period from the present time. . Control device 100 determines whether power storage device 7 is charged, discharged, or neither charged nor discharged according to the plan stored in plan storage unit 205. Then, control device 100 controls charging / discharging of power storage device 7 by transmitting a control command to power conversion device 6.

Next, the functional configuration of the control unit 21 will be described with reference to FIG. As shown in FIG. 4, the control unit 21 functionally includes a prediction unit 300, a plan generation unit 303, a charge / discharge control unit 304, a performance information acquisition unit 305, a correction unit 310, and a notification unit 320. . Each of these functions is realized by software, firmware, or a combination of software and firmware. The software and firmware are described as programs and stored in the ROM or the storage unit 22 in each device. And in the control part 21, CPU implement | achieves the function of each part, when the program memorize | stored in ROM or the memory | storage part 22 is executed.

The prediction unit 300 includes a plurality of times including the first time point and the second time point based on the prediction information at a plurality of time points including the first prediction information and the second prediction information stored in the prediction information storage unit 202. At least one of the power generation amount and the power consumption amount in the house H at the time of is predicted. The prediction unit 300 includes functions of a power generation amount prediction unit 301 that predicts a power generation amount by the power generation device 5 and a power consumption amount prediction unit 302 that predicts a power consumption amount in the house H. The function of the prediction unit 300 is realized by the control unit 21 cooperating with the storage unit 22.

The power generation amount prediction unit 301 predicts the power generation amount by the power generation device 5 based on the prediction information stored in the prediction information storage unit 202 and the facility information stored in the facility information storage unit 201. Specifically, the power generation amount prediction unit 301 refers to prediction information related to at least one of weather, sunshine duration, and solar radiation amount among the prediction information stored in the prediction information storage unit 202. Moreover, the power generation amount prediction unit 301 refers to the power generation efficiency of the power generation device 5 in the facility information stored in the facility information storage unit 201. Based on the information obtained by referring to the above, the power generation amount prediction unit 301 calculates a predicted value of the amount of power generated by the power generation device 5 in a certain future period. Here, the fixed period is, for example, 30 minutes or 24 hours, and may be an arbitrary period.

The power consumption amount prediction unit 302 predicts the power consumption amount in the house H based on the prediction information stored in the prediction information storage unit 202 and the facility information stored in the facility information storage unit 201. Specifically, the power consumption amount prediction unit 302 is at least one of the user's schedule, the usage pattern of each device 1, the temperature, and the humidity among the prediction information stored in the prediction information storage unit 202. Refer to the prediction information about. The power consumption amount prediction unit 302 refers to the power consumption characteristics of each device 1 in the facility information stored in the facility information storage unit 201. Based on the information thus obtained by reference, the power consumption amount prediction unit 302 calculates a predicted value of the amount consumed in the house H in a certain period in the future. Here, the fixed period is, for example, 30 minutes or 24 hours, and may be an arbitrary period.

The plan generation unit 303 generates a charge / discharge plan by the power storage device 7 based on the power generation amount predicted by the power generation amount prediction unit 301 and the power consumption amount predicted by the power consumption amount prediction unit 302. More specifically, the plan generation unit 303 firstly uses a power source to be consumed in the house H based on the prediction information of the unit sales price of electric power, the use of the generated power by the power generation device 5, and the power storage device. 7 to determine the priority of the power source for charging. Then, secondly, the plan generation unit 303 compares the predicted value of the power generation amount with the predicted value of the power consumption amount under the constraint of the determined priority order, and charges or discharges the power storage device 7. Or whether to charge or discharge.

FIG. 5, FIG. 6 and FIG. 7 show examples of priorities determined on the basis of the unit price of electric power. The plan shown in FIG. 5 is a plan for the purpose of suppressing the amount of power purchase in a time zone in which the power purchase unit price is relatively high. In this plan, the priority of the power source for consumption is the order of the generated power, the stored power, and the purchased power, the priority of the use of the generated power is the order of consumption, charging, and power sale, and the power source for charging is Designated as generated power only. In other words, when the power generation amount is smaller than the power consumption amount, priority is given to discharging the power storage device 7 in order to compensate for the difference, and purchase from the system power supply 4 is avoided as much as possible. Further, when the power generation amount is larger than the power consumption amount, that is, when the generated power is surplus, the power storage device 7 is charged, but is not charged until the power is purchased from the system power supply 4.

On the other hand, the plan shown in FIG. 6 is a plan for the purpose of increasing the amount of power sold in a time zone where the power selling unit price is relatively high. In this plan, the priority of use of generated power is specified in the order of consumption, power sale, and charging, unlike the plan shown in FIG. In other words, as a use of the surplus generated power when the power generation amount is larger than the power consumption amount, the power sale to the system power supply 4 is prioritized over the charging of the power storage device 7.

Further, the plan shown in FIG. 7 is a plan for the purpose of increasing the amount of charge in a time zone in which the power purchase unit price or the power sale unit price is relatively low. In this plan, the priority order of the power supply for consumption is specified in the order of generated power, purchased power, and stored power, unlike the plan shown in FIG. In other words, when the power generation amount is smaller than the power consumption amount, priority is given to purchasing power from the system power supply 4 and discharge from the power storage device 7 is avoided as much as possible. The power source for charging is designated as generated power or purchased power. In other words, the power storage device 7 is charged not only by the power generated by the power generation device 5 but also by power purchase from the system power supply 4.

The plan generation unit 303 combines the plans shown in FIGS. 5 to 7 to generate a charge / discharge plan in a predetermined arbitrary time unit. Thus, by using a plurality of predetermined plans in combination, the plan contents for each time zone can be expressed succinctly and the user can easily recognize them.

The plan generation unit 303 stores the charge / discharge plan generated as described above in the plan storage unit 205. The function of the plan generation unit 303 is realized by the control unit 21.

The charging / discharging control unit 304 controls charging / discharging of the power storage device 7 in accordance with the charging / discharging plan generated by the plan generating unit 303. More specifically, the charging / discharging control unit 304 has the first prediction information stored in the prediction information storage unit 202 at a first time among a plurality of times included in the plan generated by the plan generation unit 303. The charging / discharging of the power storage device 7 is controlled according to the plan generated based on the power storage device, and at the second time point, the power storage device according to the plan generated based on the second prediction information stored in the prediction information storage unit 202 7 is controlled.

The charging / discharging control unit 304 controls charging / discharging of the power storage device 7 by communicating with the power conversion device 6 via the wireless network constructed in the house H by the home communication unit 24. Specifically, the charge / discharge control unit 304 refers to the plan stored in the plan storage unit 205, and transmits a control command to that effect to the power conversion device 6 when the time to start charging or discharging arrives. When the time for ending charging or discharging arrives, a control command to that effect is transmitted to the power converter 6. When receiving the control command from the charge / discharge control unit 304, the power conversion device 6 converts the power according to the received control command, and causes the power storage device 7 to start or end charging or discharging. Thus, the function of the charge / discharge control unit 304 is realized by the control unit 21 cooperating with the time measuring unit 23, the home communication unit 24, and the like.

Alternatively, the charge / discharge control unit 304 may control the charge / discharge of the power storage device 7 by notifying the power conversion device 6 of the plan stored in the plan storage unit 205. In this case, the charging / discharging control unit 304 displays information indicating the contents of the plan stored in the plan storage unit 205 according to at least one of the inquiry from the power conversion device 6 and the arrival of the specified period. 24 to the power conversion device 6. Here, the specified period is, for example, 30 minutes or 3 hours, and may be an arbitrary length. The power conversion device 6 causes the power storage device 7 to start or end charging or discharging according to the plan received from the charge / discharge control unit 304.

The track record information acquisition unit 305 acquires track record information at a plurality of time points included in the charge / discharge plan generated by the plan generation unit 303 of the above-described index regarding the power generated or consumed in the house H.

More specifically, the record information acquisition unit 305 acquires record information regarding the power generation environment, the use environment, and the price of power from the wide area network N via the outside communication unit 25. Moreover, the performance information acquisition unit 305 obtains the measured value of the power consumption of each device 1 obtained by the power measurement device 3 from the power measurement device 3 via the in-home communication unit 24 as the performance information regarding the operating state of each device 1. Get. Alternatively, the record information acquisition unit 305 can acquire these record information by user input via the input / output terminal 8.

The performance information acquisition unit 305 stores the acquired performance information in the performance information storage unit 204. As described above, the function of the record information acquisition unit 305 is realized by the control unit 21 cooperating with the in-home communication unit 24, the out-of-home communication unit 25, and the like.

The correction unit 310 corrects the prediction information stored in the prediction information storage unit 202 based on the relationship between the prediction information stored in the prediction information storage unit 202 and the result information acquired by the result information acquisition unit 305. To do. The correction unit 310 includes functions of a correction necessity determination unit 311, a deviation factor estimation unit 312, and a correction result evaluation unit 313. The function of the correction unit 310 is realized by the control unit 21 cooperating with the storage unit 22.

The correction necessity determination unit 311 determines whether correction of the prediction information stored in the prediction information storage unit 202 is necessary. More specifically, when the record information is acquired by the record information acquisition unit 305, the correction necessity determination unit 311 has acquired the prediction information at a plurality of times stored in the prediction information storage unit 202. The prediction information at the time corresponding to the record information is compared with the record information. As a result of the comparison, the correction necessity determination unit 311 determines whether or not correction is necessary on the basis of the degree of deviation between the prediction information and the performance information. Specifically, the correction necessity determination unit 311 determines that the correction of the prediction information is necessary when the degree of deviation between the prediction information and the actual information is larger than the threshold, and the degree of deviation is smaller than the threshold. It is determined that the correction of the prediction information is unnecessary.

For example, if the difference between the predicted value of the temperature, humidity, sunshine duration, amount of solar radiation or unit price of electricity at a certain point in time and the actual value of that indicator at that point in time is greater than a predetermined threshold, correction is required. The rejection determination unit 311 determines that correction of the prediction information of the index is necessary. In addition, for the prediction information that the weather at a certain time is sunny, when the actual information that the weather at that time is actually rain is acquired, the correction necessity determination unit 311 predicts the weather. It is determined that information correction is necessary. Furthermore, when the performance information that the operating state of the device 1 at that time is in a different state is acquired with respect to the prediction information of the operating state of the device 1 at a certain time, the correction necessity determination unit 311 It determines with the correction | amendment of the prediction information of 1 operation state being required. Here, the case where the operating state of the device 1 is different from the predicted state is that the device 1 is predicted to be operating, whereas the actual operation is stopped or waiting, and This includes not only the reverse, but also the case where the device 1 cannot operate with the capacity assumed for reasons such as deterioration or failure.

The divergence factor estimation unit 312 estimates a factor of divergence between the prediction information and the actual information when the correction necessity determination unit 311 determines that the correction of the prediction information is necessary. For example, when it is determined that correction of prediction information such as weather, temperature, humidity, sunshine duration, or amount of solar radiation is necessary, the deviation factor estimation unit 312 estimates that the deviation from the weather forecast is a factor of deviation. To do. When it is determined that the prediction information of the operating state of each device 1 needs to be corrected, the divergence factor estimation unit 312 is caused by the change in the user's schedule or the usage pattern of each device 1. Estimated.

The correction unit 310 corrects the prediction information stored in the prediction information storage unit 202 when the correction necessity determination unit 311 determines that correction of the prediction information is necessary. For example, when it is determined that correction is necessary based on the relationship between the first prediction information predicted at the first time point and the performance information corresponding to the first prediction information, the correction unit 310 is later than the first time point. The second prediction information predicted at the second time is corrected before the second time. As described above, the correction unit 310 increases the accuracy of the subsequent prediction information by correcting the prediction information after the current time in the prediction information stored in the prediction information storage unit 202.

As a correction method, the correction unit 310 performs two types of correction: correction of prediction information based on performance information and correction by replacing prediction information with alternative data stored in the alternative data storage unit 203. . More specifically, when the degree of deviation between the first prediction information and the actual information is larger than the threshold value and the correction necessity determination unit 311 determines that correction is necessary, the correction unit 310 stores the prediction information storage Prediction information after the current time including the second prediction information stored in the unit 202 is replaced with alternative data stored in the alternative data storage unit 203. As described above, the alternative data storage unit 203 stores alternative data that is used when prediction is lost.

The correction necessity determination unit 311 determines whether or not correction is necessary again after replacing the second prediction information stored in the prediction information storage unit 202 with alternative data. More specifically, the correction necessity determination unit 311 needs to correct the prediction information again when the degree of deviation between the second prediction information after the replacement with the substitute data and the actual information is larger than the threshold value. If the degree of deviation is smaller than the threshold value, it is determined that the correction of the prediction information is unnecessary.

The correction unit 310 replaces the second prediction information stored in the prediction information storage unit 202 with alternative data, and then determines that the correction of the prediction information is necessary again by the correction necessity determination unit 311. Based on the performance information, the prediction information after the current time including the second prediction information stored in the prediction information storage unit 202 is corrected. Specifically, the correction unit 310 corrects the prediction information stored in the prediction information storage unit 202 so that the degree of divergence between the prediction information and the performance information is small. For example, when the actual value of temperature, humidity, sunshine duration, or solar radiation amount is smaller than the predicted value, the correction unit 310 predicts the future temperature, humidity, sunshine duration, or solar radiation amount stored in the prediction information storage unit 202. When the values are decreased and the actual values of these indexes are larger than the predicted values, the future predicted values stored in the predicted information storage unit 202 are increased.

If the actual operating state of the device 1 is different from the predicted operating state, the operating pattern of the device 1 stored in the prediction information storage unit 202 is corrected. For example, when it is predicted that the device 1 is not operating at a specific time but the device 1 is actually operating, the correction unit 310 is stored in the prediction information storage unit 202. The future operation pattern of the device 1 is corrected so as to be predicted to operate at that time. As described above, the correction unit 310 corrects the prediction information in accordance with the factor of deviation estimated by the deviation factor estimation unit 312 so that the difference between the prediction information and the actual information in the factor is small.

When the prediction information is corrected, the prediction unit 300 newly predicts the power generation amount by the power generation device 5 and the power consumption amount in the house H based on the corrected prediction information. Then, the plan generation unit 303 generates a new charge / discharge plan based on the prediction result, and updates the plan stored in the plan storage unit 205 with the generated plan. As a result, the correction result is reflected in the plan. Thereafter, the charge / discharge control unit 304 controls the charge / discharge of the power storage device 7 according to the new plan.

The correction result evaluation unit 313 is based on the corrected prediction information stored in the prediction information storage unit 202 and the record information stored in the record information storage unit 204, and the accuracy of correction performed by the correction unit 310. To evaluate.

The notification unit 320 includes at least one of the prediction information stored in the prediction information storage unit 202, the result information acquired by the result information acquisition unit 305, and the charge / discharge plan stored in the plan storage unit 205. Either is notified.

FIG. 8 shows an example of notification of forecast information and performance information regarding the amount of solar radiation. As illustrated in FIG. 8, the notification unit 320 generates a graph indicating the transition between the predicted value and the actual value of the solar radiation amount as the notification information, and transmits the graph to the input / output terminal 8 via the home communication unit 24. When receiving the notification information from the notification unit 320, the input / output terminal 8 displays the received notification information on the display unit. The notification unit 320 performs such notification processing in response to a request from the input / output terminal 8. The notification unit 320 is realized by the control unit 21 cooperating with the home communication unit 24.

Further, the notification unit 320 notifies the prediction information before being corrected by the correction unit 310 and the prediction information after being corrected by the correction unit 310. Specifically, when the prediction information is corrected by the correction unit 310, the notification unit 320 is a graph showing the transition between the predicted value and the actual measurement value of the solar radiation amount shown in FIG. 8, for example, as shown in FIG. In addition, the corrected predicted value is added and notified. As shown in FIG. 9, the corrected predicted value is closer to the actual value than the predicted value before the correction.

Furthermore, when the notification unit 320 determines that the correction of the prediction information is necessary by the correction necessity determination unit 311, the notification unit 320 inputs the fact that the correction is necessary and the factor estimated by the deviation factor estimation unit 312. Informs the output terminal 8. In addition, when the alerting | reporting part 320 alert | reports the plan of charging / discharging, you may alert | report together the economic effect acquired by the plan. Thus, when the notification unit 320 performs the notification process via the input / output terminal 8, the user can easily recognize various information related to the charge / discharge control of the power storage device 7.

The flow of the charging / discharging planning process executed by the control device 100 according to Embodiment 1 configured as described above will be described with reference to the flowchart shown in FIG.

The charge / discharge planning process shown in FIG. 10 is performed at regular intervals or in a state where facility information is stored in advance in the facility information storage unit 201 and prediction information is stored in the prediction information storage unit 202 in advance. This is executed according to a user instruction received via the output terminal 8. Here, the fixed period is, for example, 6 hours or 24 hours, and may be an arbitrary period.

In addition, while the charging / discharging plan process shown in FIG. 10 is being executed, the control unit 21 functions as the charging / discharging control unit 304 and passes through the power conversion device 6 according to the plan stored in the plan storage unit 205. The charging / discharging of the power storage device 7 is controlled. In addition, the notification unit 320 displays the prediction information stored in the prediction information storage unit 202, the actual information stored in the actual information storage unit 204, or the charging / discharging plan stored in the plan storage unit 205. 8 is transmitted to the input / output terminal 8 in response to a request from 8 and notified via the display unit of the input / output terminal 8.

10 is started, the control unit 21 of the control device 100 predicts the amount of power generated by the power generation device 5 and the amount of power consumed in the house H (step S101). More specifically, the control unit 21 refers to the prediction information stored in the prediction information storage unit 202 and the facility information stored in the facility information storage unit 201. Then, the control unit 21 calculates a predicted value of the amount of power generated by the power generation device 5 in a certain period in the future from the present time and a predicted value of the amount consumed in the house H. In step S 101, the control unit 21 functions as the prediction unit 300.

When the power generation amount and the power consumption amount are predicted, the control unit 21 generates a charge / discharge plan by the power storage device 7 based on the prediction result (step S102). More specifically, the control unit 21 charges the power storage device 7 based on the prediction information of the unit sales price of power, the power to be consumed in the house H, the use of the generated power by the power generation device 5, and the power storage device 7. Determine the power and priority. For example, the control unit 21 determines the priority order as shown in FIGS. And the control part 21 compares the prediction value of electric power generation amount with the prediction value of electric power consumption under restrictions of priority, and makes the electrical storage apparatus 7 charge or discharge, or neither charge nor discharge. Is determined in a predetermined unit of time.

When the control unit 21 generates the charge / discharge plan in this way, the control unit 21 stores the generated plan in the plan storage unit 205. In step S 102, the control unit 21 functions as the plan generation unit 303.

When the charge / discharge plan is generated, the control unit 21 acquires the record information (step S103). If it demonstrates concretely, the control part 21 will acquire the performance information with respect to the prediction information in the time already passed among the prediction information in the some time memorize | stored in the prediction information storage part 202. FIG. For example, the control unit 21 transmits the information on the power generation environment and usage environment such as the weather, temperature, humidity, sunshine duration, or amount of solar radiation and the result information on the price of power through the outside communication unit 25 over a wide area. Obtained from the network N or by user input via the input / output terminal 8. Moreover, the control part 21 acquires the measured value of the power consumption of each apparatus 1 obtained by the electric power measurement apparatus 3 from the electric power measurement apparatus 3 via the in-home communication part 24 as performance information regarding the operating state of each apparatus 1. To do.

When the control unit 21 acquires the record information in this way, the control unit 21 stores the acquired record information in the record information storage unit 204. In step S 103, the control unit 21 functions as the performance information acquisition unit 305.

When the result information is acquired, the control unit 21 determines whether or not the prediction information stored in the prediction information storage unit 202 needs to be corrected based on the acquired result information (step S104). If it demonstrates concretely, the control part 21 will compare the acquired performance information with the corresponding prediction information memorize | stored in the prediction information storage part 202. FIG. As a result of the comparison, when the degree of deviation between the prediction information and the performance information is larger than the threshold value, the control unit 21 determines that the correction of the prediction information is necessary. In step S 104, the control unit 21 functions as the correction necessity determination unit 311.

When it determines with correction | amendment not being required (step S104; NO), the control part 21 complete | finishes the charging / discharging plan process shown in FIG.

On the other hand, when it determines with correction | amendment being required (step S104; YES), the control part 21 replaces the prediction information memorize | stored in the prediction information memory | storage part 202 with the alternative data memorize | stored in the alternative data memory | storage part 203. FIG. (Step S105). In other words, when the difference between the prediction information and the performance information is large, the control unit 21 uses the alternative data stored in the alternative data storage unit 203 as the subsequent prediction information.

When the prediction information is replaced with alternative data, the control unit 21 determines again whether or not the prediction information stored in the prediction information storage unit 202 needs to be corrected (step S106). More specifically, the control unit 21 compares the prediction information after the replacement with the substitute data and the result information, and determines whether or not the degree of deviation of the prediction information from the result information is within a threshold value. . The control unit 21 determines that the correction of the prediction information is necessary when the degree of deviation between the prediction information after the replacement with the substitute data and the performance information is larger than the threshold value. In step S 106, the control unit 21 functions as the correction necessity determination unit 311.

When it is determined that the correction is not necessary again (step S106; NO), the control unit 21 ends the charge / discharge planning process shown in FIG.

On the other hand, when it determines with the correction | amendment being required again (step S106; YES), the control part 21 estimates the factor of the discrepancy between prediction information and performance information (step S107). In step S 107, the control unit 21 functions as the deviation factor estimation unit 312.

When the deviation factor is estimated, the control unit 21 corrects the prediction information stored in the prediction information storage unit 202 according to the deviation factor estimated by the deviation factor estimation unit 312 (step S108). More specifically, the control unit 21 corrects the prediction information after the current time stored in the prediction information storage unit 202 so that the degree of divergence between the prediction information and the performance information becomes small. In step S108, the control unit 21 functions as the correction unit 310.

When the prediction information is corrected, the control unit 21 updates the charge / discharge plan stored in the plan storage unit 205 based on the corrected prediction information (step S109). If it demonstrates concretely, the control part 21 will newly estimate the electric power generation amount by the electric power generating apparatus 5, and the power consumption amount in the house H based on the correct | amended prediction information. Then, based on the new prediction result, a new charge / discharge plan is generated, and the generated plan is stored in the plan storage unit 205.

When the charge / discharge plan is updated, the control unit 21 evaluates the correction result and determines whether the correction result is normal (step S110). In step S110, the control unit 21 functions as the correction result evaluation unit 313. As a result of the evaluation, when it is determined that the correction result is not normal (step S110; NO), the control unit 21 returns to the process of step S107 and corrects the prediction information stored in the prediction information storage unit 202 again. On the other hand, when it determines with a correction result being normal (step S110; YES), the control part 21 complete | finishes the charging / discharging plan process shown in FIG.

As described above, the power management system 1000 and the control device 100 according to the first embodiment generate power in the house H such as the weather, temperature, humidity, sunshine duration, solar radiation amount, the operating state of the device 1 or the unit price of power sales. Or the prediction information storage part 202 which memorize | stores the prediction information of the parameter | index regarding the electric power consumed is provided, and based on the relationship between the prediction information and performance information in the 1st time before a 2nd time, a prediction information storage part The prediction information stored in 202 is corrected at a time point after the current time point. Thereby, even if it is a case where prediction is uncertain, since prediction information can be corrected based on track record information, the accuracy of prediction can be improved.

As a result, charging / discharging of the power storage device 7 can be accurately controlled. By accurately controlling the charging / discharging of the power storage device 7, for example, it is possible to suppress the influence on economics due to an unexpected increase in the electricity bill. Moreover, the influence on the convenience and comfort of the user due to the shortage of the remaining amount of the power storage device 7 can be suppressed.

(Embodiment 2)
Next, a second embodiment of the present invention will be described.

The control device 100 according to the first embodiment determines whether or not the prediction information stored in the prediction information storage unit 202 needs to be corrected, and corrects the prediction information when it is determined that correction is necessary. The charging / discharging plan of the apparatus 7 was generated again. On the other hand, the control device 100a according to the second embodiment adjusts the charge / discharge of the power storage device 7 or the power consumption of each device 1 after correcting the prediction information as in the first embodiment. The power in the power management system 1000 is more actively controlled. This will be described below.

FIG. 11 shows a hardware configuration of the control device 100a according to the second embodiment. As shown in FIG. 2, the control device 100a includes a control unit 21a, a storage unit 22a, a timing unit 23, an in-home communication unit 24, and an out-of-home communication unit 25. These units are connected via a bus 29.

The configuration other than the control device 100a in the power management system 1000 according to the second embodiment is the same as the configuration according to the first embodiment. In addition, the functions of the timer unit 23, the in-home communication unit 24, and the out-of-home communication unit 25 are the same as those in the control device 100 according to the first embodiment. Therefore, these detailed explanations are omitted.

The control unit 21a includes a CPU, a ROM, a RAM, and the like, although not shown. In the control unit 21a, the CPU reads a program and data stored in the ROM, and performs overall control of the control device 100a using the RAM as a work area.

The storage unit 22a is, for example, a non-volatile semiconductor memory such as a flash memory, EPROM, or EEPROM, and plays a role as a so-called secondary storage device (auxiliary storage device). The storage unit 22a stores various programs and data used for the control unit 21a to perform various processes, and various data generated or acquired by the control unit 21a performing various processes.

The functional configuration of the storage unit 22a will be described with reference to FIG. As shown in FIG. 12, the storage unit 22a functionally includes an equipment information storage unit 201, a prediction information storage unit 202, an alternative data storage unit 203, a track record information storage unit 204, a plan storage unit 205, A characteristic storage unit 206 and a preference storage unit 207 are provided. These are constructed in an appropriate storage area in the storage unit 22a. Since the configuration other than the characteristic storage unit 206 and the preference storage unit 207 is the same as that in the first embodiment, description thereof is omitted.

The characteristic storage unit 206 stores information on the power saving capability characteristic of each device 1 in the house H. The power saving capability characteristic is a characteristic when each device 1 performs power saving. More specifically, for example, if the device 1 is an air conditioner, the information on the power saving capability characteristic can reduce the power consumption of the air conditioner by 20% by lowering the set temperature of the air conditioner by 3 ° C. It is information that power consumption can be reduced by 15% by using the power saving function.

The preference storage unit 207 stores information related to user preferences. The user's preference is which item of the economy, comfort, and environment is emphasized by the user when adjusting the power consumption by each device 1. The preference storage unit 207 stores a priority, which is a score indicating which of the economy, comfort, and environmental priority the user has as an index that represents the user's preference.

In addition, the preference storage unit 207 recognizes the input / output terminal 8 held by the user and identifies the user who is using the device 1, thereby using the device 1 for each user as an index indicating the user's preference. The operation setting and the usage tendency of the device 1 are stored. Thereby, even when there is a difference between the actual preference and the user's preference recognized by the user when input regarding the user's preference is not obtained from the user, the update based on the result information is possible, The quality of adjustment can be improved.

Next, the functional configuration of the control unit 21a will be described with reference to FIG. As shown in FIG. 13, the control unit 21 a functionally includes a prediction unit 300, a plan generation unit 303, a charge / discharge control unit 304, a performance information acquisition unit 305, a correction unit 310, and a notification unit 320. The adjustment unit 330 is provided. Since the configuration other than the adjustment unit 330 is the same as that in the first embodiment, description thereof is omitted.

Based on the relationship between the prediction information stored in the prediction information storage unit 202 and the track record information acquired by the track record information acquisition unit 305, the adjustment unit 330 is charged / discharged of the power storage device 7 or consumed at the house H. Adjusting at least one of the powers to be generated. The adjustment unit 330 includes functions of an adjustment necessity determination unit 331 and an adjustment result evaluation unit 332. The function of the adjusting unit 330 is realized by the control unit 21a cooperating with the storage unit 22a, the time measuring unit 23, the home communication unit 24, and the like.

The adjustment necessity determination unit 331 determines whether it is necessary to charge / discharge the power storage device 7 or adjust the power consumption of each device 1. Specifically, the adjustment necessity determination unit 331, when the record information is acquired by the record information acquisition unit 305, is acquired from the prediction information at a plurality of time points stored in the prediction information storage unit 202. The prediction information at the time corresponding to the record information is compared with the record information. As a result of the comparison, the adjustment necessity determination unit 331 determines that the adjustment is necessary when the degree of deviation between the prediction information and the actual information is larger than the second threshold, and the degree of deviation is smaller than the second threshold. In the case, it is determined that adjustment is unnecessary.

The second threshold value may be the same as or different from the threshold value (first threshold value) used by the correction necessity determination unit 311 to determine whether the correction of the prediction information is necessary. For example, when the second threshold is set to a value larger than the first threshold, the control device 100a corrects the prediction information when the degree of deviation between the prediction information and the performance information first exceeds the first threshold. Then, when the degree of deviation exceeds the second threshold, both the correction of the prediction information and the adjustment of power are executed. Thus, by performing correction and adjustment in two stages, it is possible to control charging / discharging of the power storage device 7 with higher accuracy.

When the adjustment necessity determination unit 331 determines that adjustment is necessary, the adjustment unit 330 adjusts at least one of charging / discharging of the power storage device 7 or power consumed in the house H. At this time, the adjustment unit 330 refers to the preference storage unit 207, and depending on whether the user gives priority to economic efficiency, comfort, or environmental performance, charging / discharging of the power storage device 7 and consumption in the house H are performed. Adjust any of the power to be.

Specifically, for example, when it is determined that the amount of power generated by the power generation device 5 is less than predicted based on the relationship between the predicted value of the sunshine duration or the amount of solar radiation and the actual value, the adjustment unit 330 determines whether the power generation amount is insufficient In order to compensate for this, the discharge amount of the power storage device 7 is increased, or the power consumption of each device 1 in the house H is reduced. Similarly, when it is determined that the power consumption amount in the house H is larger than the prediction from the relationship between the prediction information and the performance information regarding the operating state of each device 1, the adjustment unit 330 compensates for the excess power consumption amount. Therefore, the discharge amount of the power storage device 7 is increased or the power consumption amount of each device 1 in the house H is reduced.

At this time, in the case where the user gives priority to comfort, the adjustment unit 330 does not reduce the power consumption of each device 1 in the house H, so that the use of each device 1 is not hindered. Increase the amount of discharge. When the power storage device 7 cannot be discharged, power is purchased from the system power supply 4. On the other hand, when the user gives priority to economic efficiency or environmental performance, the adjustment unit 330 reduces the power consumption of each device 1 in the house H in order to avoid purchasing power. More specifically, the adjustment unit 330 reduces the power consumption of each device 1 by stopping the operation or changing the operation state to another state with less power consumption. Note that when the power storage device 7 can be discharged, the discharge amount may be increased.

When adjusting the charge / discharge of the power storage device 7, the adjustment unit 330 communicates with the power conversion device 6 via the in-home communication unit 24 and transmits a control command for the power storage device 7 to the power conversion device 6. On the other hand, when adjusting the electric power consumed in the house H, the adjustment unit 330 refers to the power saving capability characteristic of each device 1 stored in the characteristic storage unit 206, and the operation state and load characteristic of each device 1. Necessary control content is determined from the relationship between Then, the adjustment unit 330 transmits a control command to the control target device 1 via the in-home communication unit 24.

The adjustment result evaluation part 332 evaluates the adjustment result of charging / discharging of the electrical storage apparatus 7, or the power consumption of each apparatus 1. FIG. More specifically, the adjustment result evaluation unit 332 evaluates whether or not the adjustment result matches an index indicating the user's preference stored in the preference storage unit 207. For example, when the user preference places importance on economics, the adjustment result evaluation unit 332 evaluates whether or not a result of reducing the purchased electric power, that is, reducing the electricity bill is obtained by the adjustment. Or when a user's preference attaches importance to comfort, the adjustment result evaluation part 332 evaluates whether the result which does not reduce the power consumption of each apparatus 1 was obtained by adjustment. As a result of the evaluation, if it is evaluated that a result that matches the user's preference is not obtained, the adjustment unit 330 performs the adjustment again until a result that matches the user's preference is obtained.

The flow of the charging / discharging plan process executed by the control device 100a according to the second embodiment configured as described above will be described with reference to the flowchart shown in FIG.

In the charge / discharge planning process shown in FIG. 14, facility information is stored in advance in the facility information storage unit 201, prediction information is stored in advance in the prediction information storage unit 202, and information on power saving capability characteristics is stored in the property storage unit 206 in advance. The information is stored and stored in the preference storage unit 207 in advance, and is executed at regular intervals or by a user instruction received via the input / output terminal 8. Here, the fixed period is, for example, 6 hours or 24 hours, and may be an arbitrary period.

When the charging / discharging planning process shown in FIG. 14 is started, the control unit 21a executes the processes from step S101 to step S110. Since the processing from step S101 to step S110 is the same as the processing described with reference to FIG. 10 in the first embodiment, description thereof is omitted.

When the processing from step S101 to step S110 is completed, the control unit 21a determines whether charging / discharging of the power storage device 7 or adjustment of power consumption of each device 1 is necessary (step S201). More specifically, the control unit 21a compares the performance information acquired in step S103 with the corresponding prediction information stored in the prediction information storage unit 202. As a result of the comparison, when the degree of deviation between the prediction information and the performance information is larger than the second threshold, the control unit 21a determines that adjustment is necessary. In step S201, the control unit 21a functions as the adjustment necessity determination unit 331.

When it determines with adjustment not being required (step S201; NO), the control part 21a complete | finishes the charging / discharging plan process shown in FIG.

On the other hand, when it determines with adjustment being required (step S201; YES), the control part 21a adjusts charging / discharging of the electrical storage apparatus 7, or the power consumption of the apparatus 1 (step S202). Specifically, the control unit 21a adjusts the discharge amount of the power storage device 7 and adjusts the power consumption amount of each device 1 in the house H according to the user's preference stored in the preference storage unit 207. Perform at least one of the following: In step S202, the control unit 21a functions as the adjustment unit 330.

When the charge / discharge of the power storage device 7 or the power consumption of each device 1 is adjusted, the control unit 21a evaluates the adjustment result and determines whether or not the adjustment is necessary again (step S203). More specifically, the control unit 21a refers to the preference storage unit 207, evaluates whether or not it matches the user's preference, and when the result matching the user's preference is not obtained. Then, it is determined that the adjustment is necessary again. In step S 203, the control unit 21 a functions as the adjustment result evaluation unit 332.

As a result of the evaluation, if it is determined that re-adjustment is necessary (step S203; YES), the control unit 21a returns to the process of step S202 to again charge / discharge the power storage device 7 or the power consumption of each device 1. adjust. On the other hand, when it determines with the need for adjustment again (step S203; NO), the control part 21a complete | finishes the charging / discharging plan process shown in FIG.

As described above, the power management system 1000 and the control device 100a according to the second embodiment are consumed in the charge / discharge of the power storage device 7 or the house H when the prediction information and the performance information are deviated. Adjust at least one of the power. By positively controlling the power balance in this way, it is possible to remove deviations that cannot be dealt with only by correcting the prediction information when prediction is lost. As a result, charging / discharging of the power storage device 7 can be controlled more accurately.

(Modification)
The embodiment of the present invention has been described above, but various modifications and applications can be made in implementing the present invention.

For example, in the above embodiment, the prediction information storage unit 202 uses the power generation amount generated by the power generation device 5 such as the weather, temperature, or amount of solar radiation in the house H as the prediction information of the index related to the power generated or consumed in the house H, or Prediction information of elements affecting the power consumption in the house H was stored. However, in the present invention, the prediction information storage unit 202 stores the prediction information of the power generation amount itself by the power generation device 5 as an index related to the power generated in the house H, and the prediction information of the index related to the power consumed in the house H As such, the prediction information of the power consumption itself in the house H may be stored. In this case, the plan generation unit 303 generates a plan for charging / discharging by the power storage device 7 based on the power generation amount or the power consumption amount stored in the prediction information storage unit 202. Further, the record information acquisition unit 305 acquires the record information of the power generation amount or the power consumption amount, and the correction unit 310 acquires the power generation amount or the power consumption amount stored in the prediction information storage unit 202 and the record information acquisition unit 305. The power generation amount or power consumption amount thus compared is compared to determine whether or not correction is necessary, and the power generation amount or power consumption amount stored in the prediction information storage unit 202 is corrected.

Further, the prediction information storage unit 202 may store only one of an index related to the power generated in the house H and an index related to the power consumed in the house H. In this case, the control device 100 includes only one of the power generation amount prediction unit 301 and the power consumption amount prediction unit 302, and predicts only one of the power generation amount and the power consumption amount. And the plan production | generation part 303 produces | generates the plan of charging / discharging based on the estimated electric power generation amount or electric power consumption.

In the above embodiment, the power measuring device 3 measures the power transmitted through each power line by CT1 to CT6, and transmits the measured value to the control device 100. However, the power measurement device 3 may be included in another device, or a device other than the power measurement device 3 may measure the power. For example, the power measuring device 3 is incorporated in some or all of the plurality of devices 1A, 1B, 1C,..., And the device 1 incorporating the power measuring device 3 measures the power consumption of its own device, and the control device 100 may be transmitted. Further, the power conversion device 6 may measure the power input to itself and the power output from the power conversion device 6 and transmit the measured power to the control device 100. The power measurement value obtained in this way is appropriately transmitted via a wireless network built in the house H, and can be shared among the devices.

Further, in FIG. 1, two facilities of the power generation device 5 and the power storage device 7 are connected to one power conversion device 6. However, one power conversion device may be installed for each of the power generation device 5 and the power storage device 7. Moreover, each of the electric power generating apparatus 5 and the electrical storage apparatus 7 may incorporate a power converter device.

In the above embodiment, the power generation device 5 is installed in the house H. However, as long as the power generation device 5 is a power system different from the system power supply 4, the power generation device 5 may be installed on a site separate from the house H and supply power to the house H from a remote location. In this case, the place where the power generation device 5 is installed is referred to as a power demand place. In addition, the power demand area is not limited to a general house such as the house H described above, but may be an apartment house, a facility, a building, a factory, or the like as long as it receives power from the system power supply 4. good. Moreover, the apparatus 1 which consumes electric power in an electric power demand area is not restricted to plural, and should just be at least 1 or more.

In the above embodiment, the case where the

control devices

100 and 100a are installed in the house H has been described. However, in the present invention, a device having a function equivalent to that of the

control devices

100, 100a may be installed outside the house H. FIG. 15 shows an example of the power management system 1001 in this case. In the power management system 1001 illustrated in FIG. 15, the router 9 is installed in the house H instead of the

control devices

100 and 100 a. The router 9 is a device that communicates with the server 10 via the wide area network N, and is, for example, a broadband router. In this case, the router 9 and the server 10 cooperate to play the roles of the

control devices

100 and 100a.

In the above embodiment, the input / output terminal 8 includes a display unit and an input unit, and the

control devices

100 and 100a acquire the input information input to the input / output terminal 8 via wireless or wired communication, Display information was transmitted to the input / output terminal 8 and displayed. However, in the present invention, the

control devices

100 and 100a may include a display unit and an input unit. In other words, the functions of the input / output terminal 8 may be provided in the

control devices

100 and 100a themselves.

In the above embodiment, in the

control units

21 and 21a of the

control devices

100 and 100a, the CPU executes the programs stored in the ROM or the

storage units

22 and 22a, so that the prediction unit 300, the plan generation unit 303, The charge / discharge control unit 304, the record information acquisition unit 305, the correction unit 310, the notification unit 320, and the adjustment unit 330 functioned. However, in the present invention, the

control units

21 and 21a may be dedicated hardware. The dedicated hardware is, for example, a single circuit, a composite circuit, a programmed processor, an ASIC (Application Specific Integrated 、 Circuit), an FPGA (Field-Programmable Gate Array), or a combination thereof. When the

control units

21 and 21a are dedicated hardware, the functions of the respective units may be realized by individual hardware, or the functions of the respective units may be collectively realized by a single hardware.

Also, some of the functions of each unit may be realized by dedicated hardware, and the other part may be realized by software or firmware. As described above, the

control units

21 and 21a can realize the functions described above by hardware, software, firmware, or a combination thereof.

By applying an operation program defining the operation of the

control devices

100 and 100a according to the present invention to a computer such as an existing personal computer or information terminal device, the computer is caused to function as the

control devices

100 and 100a according to the present invention. It is also possible.

Further, such a program distribution method is arbitrary. For example, a computer-readable record such as a CD-ROM (Compact Disk ROM), a DVD (Digital Versatile Disk), an MO (Magneto Optical Disk), or a memory card. It may be distributed by being stored on a medium, or distributed via a communication network such as the Internet.

The present invention is capable of various embodiments and modifications without departing from the broad spirit and scope of the present invention. The above-described embodiments are for explaining the present invention and do not limit the scope of the present invention. In other words, the scope of the present invention is shown not by the embodiments but by the claims. Various modifications made within the scope of the claims and within the scope of the equivalent invention are considered to be within the scope of the present invention.

The present invention can be suitably employed in a system for managing power.

1, 1A, 1B, 1C equipment, 2 distribution board, 3 power measurement device, 4 system power supply, 5 power generation device, 6 power conversion device, 7 power storage device, 8 input / output terminal, 9 router, 10

server

100, 100a control Device, 21, 21a control unit, 22, 22a storage unit, 23 timing unit, 24 in-home communication unit, 25 out-of-home communication unit, 29 bus, 201 facility information storage unit, 202 prediction information storage unit, 203 alternative data storage unit, 204 Actual information storage unit, 205 Plan storage unit, 206 Characteristic storage unit, 207 Preference storage unit, 300 Prediction unit, 301 Power generation amount prediction unit, 302 Power consumption amount prediction unit, 303 Plan generation unit, 304 Charge / discharge control unit, 305 Achievement information acquisition unit, 310 correction unit, 311 correction necessity determination unit, 312 deviation factor estimation unit, 313 correction result evaluation unit, 320 notification unit, 330 adjustment unit, 331 adjustment necessity Judgment unit, 332 Adjustment result evaluation unit, 1000, 1001 Power management system, H house, N wide area network

Claims

A control device for controlling charging / discharging of a power storage device in a power demand area,
First prediction information predicted at a first time point, which is prediction information of an index related to at least one of power generated in the power demand area or power consumed in the power demand area; Prediction information storage means for storing second prediction information predicted at a second time after the first time;
At the first time point, charge / discharge of the power storage device is controlled based on the first prediction information stored in the prediction information storage unit, and stored in the prediction information storage unit at the second time point. Charging / discharging control means for controlling charging / discharging of the power storage device based on the second predicted information,
A record information acquisition means for acquiring record information of the index at the first time point;
Correction means for correcting the second prediction information stored in the prediction information storage means based on the relationship between the first prediction information and the performance information before the second time point. ,
Control device.
A plan generation unit configured to generate a plan for charging and discharging by the power storage device based on the first prediction information and the second prediction information stored in the prediction information storage unit;
The charge / discharge control means controls charge / discharge of the power storage device according to the plan generated by the plan generation means,
When the second prediction information is corrected by the correction unit, the plan generation unit updates the plan based on the second prediction information corrected by the correction unit.
The control device according to claim 1.
Based on the first prediction information and the second prediction information stored in the prediction information storage means, the power generation amount or the power consumption amount at the power demand area at the first time point and the second time point. Predicting means for predicting at least one of
The plan generation unit generates the plan based on the power generation amount or the power consumption amount predicted by the prediction unit.
The control device according to claim 2.
When the degree of divergence between the first prediction information and the performance information is larger than a threshold value, the correction means calculates the second prediction information stored in the prediction information storage means based on the performance information. to correct,
The control device according to any one of claims 1 to 3.
The correction means corrects the second prediction information stored in the prediction information storage means by replacing the second prediction information stored in the prediction information storage means with substitute data.
The control device according to claim 1.
The correcting means replaces the second prediction information stored in the prediction information storage means with the substitute data, and then the degree of deviation between the second prediction information and the performance information is larger than a threshold value. , Correcting the second prediction information stored in the prediction information storage means based on the performance information,
The control device according to claim 5.
An adjustment unit that adjusts at least one of charging / discharging of the power storage device and power consumed in the power demand area based on the relationship between the first prediction information and the performance information. ,
The control device according to any one of claims 1 to 6.
The adjusting means may be one of charging / discharging of the power storage device and power consumed in the power demand area, depending on whether the user gives priority to economy, comfort, or environment. Adjust the
The control device according to claim 7.
A notification means for notifying at least one of the first prediction information stored in the prediction information storage means and the performance information acquired by the performance information acquisition means;
The control device according to any one of claims 1 to 8.
The notifying means notifies the second prediction information before being corrected by the correcting means and the second prediction information after being corrected by the correcting means;
The control device according to claim 9.
The prediction information storage unit stores prediction information on weather, sunshine hours, or solar radiation in the power demand area as prediction information on an index related to power generated in the power demand area, and is consumed in the power demand area. As the prediction information of the index regarding the power to be stored, the prediction information of the operating state, temperature, humidity, or power price of at least one device in the power demand area is stored.
The control device according to any one of claims 1 to 10.
A control device according to any one of claims 1 to 11, the power storage device, and a power conversion device that charges or discharges the power storage device.
Power management system.
A method for controlling charging / discharging of a power storage device in a power demand area,
Controlling charging / discharging of the power storage device based on prediction information of an index related to at least one of power generated in the power demand area or power consumed in the power demand area at a first time point And
Obtaining the performance information of the indicator at the first time point;
Based on the relationship between the prediction information and the performance information, the prediction information is corrected,
Controlling charging / discharging of the power storage device based on the corrected prediction information at a second time point after the first time point;
Charge / discharge control method.
First prediction information predicted at a first time point, which is prediction information of an index related to at least one of electric power generated in an electric power demand area or electric power consumed in the electric power demand area; A computer that includes prediction information storage means for storing second prediction information predicted at a second time point after the first time point, and controls charging / discharging of the power storage device in the power demand area,
At the first time point, charge / discharge of the power storage device is controlled based on the first prediction information stored in the prediction information storage unit, and stored in the prediction information storage unit at the second time point. Charge / discharge control means for controlling charge / discharge of the power storage device based on the second prediction information
A record information acquisition means for acquiring record information of the index at the first time point;
Prior to the second time point, based on the relationship between the first prediction information and the performance information, the correction function is configured to correct the second prediction information stored in the prediction information storage unit. ,
program.