JP2009284586A - Power system and its control method - Google Patents

Power system and its control method Download PDF

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JP2009284586A
JP2009284586A JP2008131773A JP2008131773A JP2009284586A JP 2009284586 A JP2009284586 A JP 2009284586A JP 2008131773 A JP2008131773 A JP 2008131773A JP 2008131773 A JP2008131773 A JP 2008131773A JP 2009284586 A JP2009284586 A JP 2009284586A
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power
amount
discharger
charger
demand
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JP5095495B2 (en
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Yasushi Irokawa
泰史 色川
Yosuke Nozaki
洋介 野崎
Akifumi Somatani
聡文 杣谷
Akira Takeuchi
章 竹内
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Nippon Telegraph and Telephone Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/10—Photovoltaic [PV]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power system which improves the efficiency of accumulating surplus power and cuts the peak of the power from a commercial power system. <P>SOLUTION: A solar cell 1 generates electricity, according to the quantity of irradiation light. A charger-discharger 4 performs charge and discharge to a storage battery 103, and also measures the charged electric energy charged in the storage battery 103. A predictor 11 predicts electric power generated in the solar cell 1 and demanded electric energy to be consumed in home electric appliances 102. A planning division 12 plans the charge and discharge by the charger-discharger 4, based on the electric power generation and the demanded electric energy that the predictor 11 has predicted and the charged electric energy that the charger-discharger 4 has measured. A controller 13 controls the charge and discharge by the charger-discharger 4, according to the plan that the planning division 12 has made. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、太陽光発電システムで発電された電力を、蓄電池と電力負荷の間で融通する電力システムおよびその制御方法に関する。   The present invention relates to an electric power system that accommodates electric power generated by a solar power generation system between a storage battery and an electric power load, and a control method thereof.

近年、太陽光発電システムと蓄電池と有する家庭内電力システムが使用されている。このような家庭内電力システムでは、太陽光発電システムで発電された電力が、蓄電池と家電などの家庭内電力負荷との間で融通される。このとき、家庭内電力システムは、家庭内電力負荷で消費される電力が少ないときには、太陽光発電システムで発電された電力を蓄電池に蓄える。また、家庭内電力システムは、家庭内電力負荷で消費される電力が多いときには、その蓄電池に蓄えた電力を家庭内電力負荷に供給する。これにより、商用電力系統から供給される電力の平準化が行われる。   In recent years, a domestic power system having a photovoltaic power generation system and a storage battery has been used. In such a home power system, the power generated by the solar power generation system is interchanged between a storage battery and a home power load such as a home appliance. At this time, the home power system stores the power generated by the solar power generation system in the storage battery when the power consumed by the home power load is small. Further, the home power system supplies the power stored in the storage battery to the home power load when the power consumed by the home power load is large. Thereby, the power supplied from the commercial power system is leveled.

このような家庭内電力システムとしては、特許文献１に記載の家庭用簡易型太陽光発電システムがある。この家庭用簡易型太陽光発電システムでは、蓄電池として、電気自動車に搭載された蓄電池が使用される。
特開平８−１９１９３号公報 As such an in-home power system, there is a simple solar power generation system for home described in Patent Document 1. In this home-use simplified solar power generation system, a storage battery mounted on an electric vehicle is used as the storage battery.
JP-A-8-19193

太陽光発電システムにおける発電量は、昼の時間帯において家庭電力負荷による電力消費量を上回ることがある。この上回った余剰電力は、商用電力系統へ逆潮流され、電力会社に売電される場合が多い。しかしながら、この商用電力系統への逆潮流は、その商用電力系統の電力品質を低下させる。このため、太陽光発電システムを備えた家庭内電力システムが大規模に普及し電力の逆潮流が増えた場合、この逆潮流による商用電力系統の電力品質は、無視できないほど低下するという問題がある。   The amount of power generated by the solar power generation system may exceed the amount of power consumed by the household power load during the daytime. In many cases, the surplus power surpassed is reversely flowed to the commercial power system and sold to the power company. However, this reverse power flow to the commercial power system reduces the power quality of the commercial power system. For this reason, when a household power system equipped with a photovoltaic power generation system is widely spread and the reverse power flow increases, there is a problem that the power quality of the commercial power system due to the reverse power flow is reduced to a negligible level. .

特許文献１に記載の家庭用簡易型太陽光発電システムでは、電気自動車に搭載された蓄電池に余剰電力を蓄えている。しかしながら、蓄電池の容量は限られているため、蓄電池の空き容量が不足して、余剰電力を蓄えることができないという課題が発生する。特に、
電気自動車に搭載されている蓄電池は、電気自動車の動力として使用するための電力量を確保しておくことが必要であるため、余剰電力を蓄えることが可能な蓄電池の容量が少なくなる。 In the home-use simplified solar power generation system described in Patent Document 1, surplus power is stored in a storage battery mounted on an electric vehicle. However, since the capacity of the storage battery is limited, there is a problem that the free capacity of the storage battery is insufficient and excess power cannot be stored. In particular,
Since the storage battery mounted on the electric vehicle needs to secure an amount of power to be used as power for the electric vehicle, the capacity of the storage battery capable of storing surplus power is reduced.

また、この家庭用簡易型太陽光発電システムでは、その蓄えた電力を、家庭内電力負荷による消費電力が多いときに、その家庭内電力負荷に供給することで、商用電力系統から家庭内電力負荷に供給する電力のピークカットを行う。しかしながら、蓄電池の充電電力量が少ない場合、蓄電池から家電への電力供給が不足する。したがって、商用電力系統から家庭内電力負荷への電力の供給が増加して、商用電力系統からの電力のピークカットが十分に行えないという課題も発生する。   In addition, in this simple solar power generation system for home use, the stored power is supplied to the home power load when there is a large amount of power consumed by the home power load. The peak of the power supplied to is cut. However, when the amount of charging power of the storage battery is small, power supply from the storage battery to the home appliance is insufficient. Therefore, the supply of electric power from the commercial power system to the household power load increases, causing a problem that peak cutting of power from the commercial power system cannot be performed sufficiently.

そこで、本発明の目的は、少なくとも余剰電力を蓄える効率を向上させることを可能にし、さらには、商用電力系統からの電力のピークカットを行うことが可能な電力システムおよびその制御方法を提供することである。   Accordingly, an object of the present invention is to provide an electric power system capable of improving efficiency for storing at least surplus electric power, and further capable of performing peak cut of electric power from a commercial electric power system, and a control method thereof. It is.

本発明による電力システムは、電力負荷、電力系統および蓄電池に接続可能な電力システムであって、照射される光の量に応じて電力を発電する太陽電池と、前記蓄電池に対する充放電を行い、また、前記蓄電池に充電されている充電電力量を計測する充放電器と、前記充放電器が放電する際には、該放電された電力と、前記電力系統からの電力と、前記太陽電池にて発電された電力と、を前記電力負荷に供給し、また、前記充放電器が充電する際には、前記電力系統からの電力と、前記太陽電池にて発電された電力と、を前記電力負荷および充放電器に供給する分電盤と、前記太陽電池で発電される発電量、および、前記電力負荷で消費される需要電力量を予測する予測部と、前記予測部が予測した発電量および需要電力量と、前記充放電器が計測した充電電力量とに基づいて、前記充放電器による充放電の計画を立てる計画部と、前記計画部が立てた計画に従って、前記充放電器による充放電を制御する制御部と、を含む。   The power system according to the present invention is a power system that can be connected to a power load, a power system, and a storage battery, and performs solar cell generation that generates power according to the amount of light that is irradiated, charging and discharging the storage battery, and A charger / discharger that measures the amount of charging power charged in the storage battery; and when the charger / discharger discharges, the discharged power, the power from the power system, and the solar cell The generated power is supplied to the power load, and when the charger / discharger is charged, the power from the power system and the power generated by the solar cell are combined with the power load. And a distribution board to be supplied to the charger / discharger, a power generation amount generated by the solar cell, a prediction unit that predicts a demand power amount consumed by the power load, a power generation amount predicted by the prediction unit, and Demand power and charge / discharge And a control unit for controlling charging / discharging by the charger / discharger according to a plan established by the planning unit, based on the charging energy measured by the charging / discharging unit, Including.

本発明による電力システムの制御方法は、照射される光の量に応じて電力を発電する太陽電池と、蓄電池に対する充放電を行う充放電器と、前記充放電器が放電する際には、該放電された電力と電力系統からの電力と前記太陽電池にて発電された電力とを前記電力負荷に供給し、また、前記充放電器が充電する際には、前記電力系統からの電力と前記太陽電池にて発電された電力とを前記電力負荷および充放電器に供給する分電盤と、を含む電力システムの制御方法であって、前記蓄電池に充電されている充電電力量を計測する計測ステップと、前記太陽電池で発電される発電量、および、前記電力負荷で消費される需要電力量を予測する予測ステップと、前記予測された発電量および需要電力量と、前記計測された充電電力量とに基づいて、前記充放電器による充放電の計画を立て立案ステップと、前記立てられた計画に従って、前記充放電器による充放電を制御する制御ステップと、を含む。   The control method of the power system according to the present invention includes a solar cell that generates power according to the amount of irradiated light, a charger / discharger that charges / discharges a storage battery, and when the charger / discharger discharges, When the discharged power, the power from the power system and the power generated by the solar battery are supplied to the power load, and when the charger / discharger is charged, the power from the power system and the power A distribution system for supplying power generated by a solar battery to the power load and a charger / discharger, and a method for controlling an electric power system that measures the amount of charging power charged in the storage battery A step of predicting a power generation amount generated by the solar battery and a demand power amount consumed by the power load; the predicted power generation amount and demand power amount; and the measured charging power Based on quantity and A planning step plan for charging and discharging by the charging and discharging device, according to the erected plan, and a control step of controlling the charging and discharging by the charging and discharging unit.

本発明によれば、少なくとも余剰電力を蓄える効率を向上させることが可能になり、さらには、商用電力系統からの電力のピークカットを行うことが可能になる。   According to the present invention, it is possible to improve efficiency for storing at least surplus power, and it is possible to perform peak cut of power from a commercial power system.

以下、本発明の実施形態について図面を参照して説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１は、本発明の一実施形態の電力システムを示したブロック図である。図１において、電力システムは、太陽電池１および変換器２を含む太陽光発電システムと、分電盤３と、充放電器４と、制御端末５とを含む。電力システムは、商用系統１０１と、家電１０２と、蓄電池１０３と相互に接続可能である。また、電力システムは、インターネット１０５を介してサーバ１０４に相互に接続可能である。   FIG. 1 is a block diagram showing a power system according to an embodiment of the present invention. In FIG. 1, the power system includes a solar power generation system including a solar cell 1 and a converter 2, a distribution board 3, a charger / discharger 4, and a control terminal 5. The power system can be connected to the commercial system 101, the home appliance 102, and the storage battery 103. Further, the power system can be connected to the server 104 via the Internet 105.

なお、電力システムおよび家電１０２は、住宅１０６に配置され、蓄電池１０３は、電気自動車１０７に搭載される。   Note that the power system and the home appliance 102 are arranged in a house 106, and the storage battery 103 is mounted on an electric vehicle 107.

太陽電池１は、照射される光の量（以下、日射量と称する）に応じて電力を発電し、その電力を変換器２に出力する。なお、太陽電池１で発電される電力は、直流電力である。   The solar cell 1 generates electric power according to the amount of light irradiated (hereinafter referred to as the amount of solar radiation), and outputs the electric power to the converter 2. Note that the electric power generated by the solar cell 1 is direct-current power.

変換器２は、例えば、パワーコンディショナである。変換器２は、太陽電池１からの直流電力を交流電力に変換し、その交流電力を分電盤３に出力する。また、変換器２は、その変換した交流電力量を、太陽電池１で発電された発電量として計測する。ここで、変換器２は、予め定められた時間帯ごと、その時間帯で発電された発電量を計測する。   The converter 2 is, for example, a power conditioner. Converter 2 converts the DC power from solar cell 1 to AC power and outputs the AC power to distribution board 3. The converter 2 measures the converted AC power amount as the power generation amount generated by the solar cell 1. Here, the converter 2 measures the power generation amount generated in the predetermined time zone for each time zone.

分電盤３は、商用電力系統である商用系統１０１と相互に接続可能である。分電盤３は、充放電器４が放電する際には、その放電された電力と、商用系統１０１からの電力と、太陽電池１にて発電された電力と、を家電１０２に供給する。また、分電盤３は、充放電器４が充電する際には、商用系統１０１からの電力と、太陽電池１にて発電された電力と、を家電１０２および充放電器４に供給する。さらに、分電盤３は、充放電器４にて放電されている放電電力量が、家電１０２で消費されている現消費電力量より多い場合、放電電力量と現消費電力量との差に相当する電力量の商用系統１０１への逆潮流を行う。   The distribution board 3 can be connected to the commercial system 101, which is a commercial power system. When the charger / discharger 4 is discharged, the distribution board 3 supplies the discharged electric power, the electric power from the commercial system 101, and the electric power generated by the solar battery 1 to the home appliance 102. Further, when the charger / discharger 4 is charged, the distribution board 3 supplies the electric power from the commercial system 101 and the electric power generated by the solar cell 1 to the home appliance 102 and the charger / discharger 4. Furthermore, when the amount of discharge power discharged by the charger / discharger 4 is larger than the current power consumption consumed by the home appliance 102, the distribution board 3 determines the difference between the discharge power amount and the current power consumption amount. A reverse power flow to the commercial system 101 with a corresponding amount of electric power is performed.

また、分電盤３は、家電１０２で消費された消費電力量と、商用系統１０１への逆潮流量と、商用系統１０１から供給されている購入電力量とを計測する。ここで、分電盤３は、上記の時間帯ごとに、その時間帯で消費された消費電力量を計測する。また、分電盤３は、逆潮流を常に計測している。なお、分電盤３が変換器２の代わりに発電量を計測してもよい。   In addition, the distribution board 3 measures the amount of power consumed by the home appliance 102, the reverse power flow to the commercial system 101, and the amount of purchased power supplied from the commercial system 101. Here, the distribution board 3 measures the amount of power consumed in each time zone described above. Moreover, the distribution board 3 always measures reverse power flow. The distribution board 3 may measure the amount of power generation instead of the converter 2.

なお、家電１０２は、電力負荷の一例である。また、家電１０２は、一つでもよいし、複数でもよいが、図１では、複数あるとしている。   The home appliance 102 is an example of a power load. Further, the home appliance 102 may be one or plural, but in FIG.

充放電器４は、蓄電池１０３と相互に接続可能であり、蓄電池１０３に対する充放電を行う充放電システムを構成する。また、充放電器４は、蓄電池１０３に充電されている充電電力量を常に計測する。なお、蓄電池１０３は、電気自動車１０７の動力源としても機能する。   The charger / discharger 4 can be connected to the storage battery 103 and constitutes a charge / discharge system that charges and discharges the storage battery 103. Further, the charger / discharger 4 always measures the amount of charging power charged in the storage battery 103. The storage battery 103 also functions as a power source for the electric vehicle 107.

制御端末５は、インターネット１０５を介してサーバ１０４と相互に接続可能である。サーバ１０４は、気象情報サービスとして、上記の時間帯ごとの実際に観測された気象を示す実気象情報と、所定期間（例えば、翌日から１週間後までの期間）内の上記の時間帯ごとの気象の予測を示す気象予報情報とを提供する。ここで、実気象情報としては、天気（例えば、晴れ、曇りおよび雨など）を示す天気情報と、気温を示す気温情報とがある。また、気象予報情報としては、天気の予測を示す天気予報情報と、気温の予測を示す気温予報情報とがある。   The control terminal 5 can be connected to the server 104 via the Internet 105. The server 104 provides, as a weather information service, actual weather information indicating actually observed weather for each of the above time zones, and for each of the above time zones within a predetermined period (for example, a period from the next day to one week later). And weather forecast information indicating the forecast of the weather. Here, the actual weather information includes weather information indicating weather (for example, sunny, cloudy, rainy, etc.) and temperature information indicating temperature. The weather forecast information includes weather forecast information indicating the prediction of the weather and temperature forecast information indicating the prediction of the temperature.

制御端末５は、予測部１１と、計画部１２と、制御部１３とを含む。   The control terminal 5 includes a prediction unit 11, a planning unit 12, and a control unit 13.

予測部１１は、定期的に（例えば、毎日）、サーバ１０４から実気象情報および気象予報情報を受信し、その実気象情報および気象予報情報を蓄積する。   The prediction unit 11 receives actual weather information and weather forecast information from the server 104 periodically (for example, every day), and accumulates the actual weather information and weather forecast information.

また、予測部１１は、変換器２で計測された時間帯ごとの発電量を、その時間帯と対応付けて蓄積する。さらに、予測部１１は、分電盤３で計測された時間帯ごとの消費電力量を、その時間帯と対応付けて蓄積する。   Further, the prediction unit 11 accumulates the power generation amount for each time zone measured by the converter 2 in association with the time zone. Further, the prediction unit 11 accumulates the power consumption for each time zone measured by the distribution board 3 in association with the time zone.

予測部１１は、その蓄積した実気象情報、気象予報情報、発電量および消費電力量に基づいて、予め定められた予測期間内に太陽電池１で発電される発電量を時間帯別に予測する。また、予測部１１は、その蓄積した実気象情報、気象予報情報、発電量および消費電力量に基づいて、その予測期間内に家電１０２で消費される消費電力量を時間帯別に予測する。   Based on the accumulated actual weather information, weather forecast information, power generation amount, and power consumption amount, the prediction unit 11 predicts the power generation amount generated by the solar cell 1 within a predetermined prediction period for each time period. Further, the prediction unit 11 predicts the power consumption amount consumed by the home appliance 102 within the prediction period for each time zone based on the accumulated actual weather information, weather forecast information, power generation amount, and power consumption amount.

以下、その予測された時間帯別の発電量を発電予測と称し、その予測された時間帯別の消費電力量を需要予測と称する。なお、需要予測は、需要電力量の一例である。   Hereinafter, the predicted power generation amount by time zone is referred to as power generation prediction, and the predicted power consumption amount by time zone is referred to as demand prediction. The demand prediction is an example of the amount of power demand.

以下、予測部１１による発電予測の具体的な生成方法について説明する。   Hereinafter, a specific generation method of power generation prediction by the prediction unit 11 will be described.

先ず、予測部１１は、予め定められた期間（例えば、３０日）分の時間帯別の実気象情報、発電量および需要電力量が蓄積されると、その期間分の時間帯別の天気情報および発電量をサンプルとして抽出する。予測部１１は、それらのサンプルに対して回帰分析を行い、天気情報から発電量を予測するための発電予測式を時間帯別に導出する。この回帰分析では、説明変数（独立変数）は、天気情報であり、目的変数（従属変数）は発電量である。   First, when the actual weather information for each predetermined time period (for example, 30 days), the power generation amount, and the demand power amount are accumulated, the prediction unit 11 stores the weather information for each time period for that period. And the amount of power generation is extracted as a sample. The prediction unit 11 performs regression analysis on these samples, and derives a power generation prediction formula for predicting the power generation amount from the weather information for each time zone. In this regression analysis, the explanatory variable (independent variable) is weather information, and the objective variable (dependent variable) is the amount of power generation.

例えば、予測部１１は、天気情報を、晴れを１とし、曇りを２とし、雨を３とするなどして数値化する。そして、予測部１１は、時間帯別に、その時間帯のその数値化した天気情報を説明変数Ｘとし、その時間帯の発電量を目的変数Ｙとした回帰式Ｙ＝α＋βＸの定数項αおよび回帰係数βを最小二乗法から求めて、発電予測式を時間帯別に導出する。なお、回帰分析による発電予測式の導出法は、この方法に限らず適宜変更可能である。   For example, the prediction unit 11 quantifies the weather information by setting sunny as 1, cloudy as 2, rain as 3, and so on. Then, for each time zone, the prediction unit 11 sets the numerical weather information in that time zone as the explanatory variable X, and sets the power generation amount in that time zone as the objective variable Y. The constant term α of the regression equation Y = α + βX and the regression The coefficient β is obtained from the least square method, and the power generation prediction formula is derived for each time zone. Note that the method for deriving the power generation prediction formula by regression analysis is not limited to this method, and can be changed as appropriate.

続いて、予測部１１は、時間帯別に、その時間帯の発電予測式に、その時間帯の天気予報情報を入力して、時間帯別の発電予測を生成する。ここで、予測部１１は、発電予測式を導出する際に天気情報を数値化した方法と同じ方法で、天気予報情報を数値化してから用いる。   Subsequently, the prediction unit 11 inputs the weather forecast information of the time zone into the power generation prediction formula of the time zone for each time zone, and generates a power generation prediction for each time zone. Here, the prediction unit 11 uses the weather forecast information after quantifying the weather information by the same method as the method of quantifying the weather information when deriving the power generation prediction formula.

次に、需要予測の具体的な生成方法について説明する。   Next, a specific method for generating demand prediction will be described.

先ず、予測部１１は、その蓄積されたデータから、予め定められた期間分の時間帯別の天気情報、気温情報および需要電力量をサンプルとして抽出する。予測部１１は、それらのサンプルに対して回帰分析を行い、天気情報および気温情報から需要電力量を予測するための需要予測式を時間帯別に導出する。この回帰分析では、説明変数は、天気および気温であり、目的変数は需要電力量である。   First, the prediction unit 11 extracts weather information, temperature information, and demand power amount for each predetermined time period as samples from the accumulated data. The prediction unit 11 performs regression analysis on these samples, and derives a demand prediction formula for predicting the demand power amount from the weather information and the temperature information for each time zone. In this regression analysis, the explanatory variables are weather and temperature, and the objective variable is the amount of power demand.

例えば、予測部１１は、天気を、晴れを１とし、曇りを２とし、雨を３とするなどして数値化する。そして、予測部１１は、時間帯別に、その時間帯の天気を説明変数Ｘ1とし、その時間帯の気温を説明変数Ｘ2、その時間帯の需要電力量を目的変数Ｚとした回帰式Ｚ＝γ＋δＸ1＋εＸ2の定数項γおよび回帰係数δおよびεを最小二乗法から求めて、需要予測式を時間帯別に導出する。なお、回帰分析による需要予測式の導出法は、この方法に限らず適宜変更可能である。 For example, the prediction unit 11 quantifies the weather by setting sunny as 1, cloudy as 2, rain as 3, and so on. Then, for each time zone, the prediction unit 11 uses a regression equation Z in which the weather in that time zone is the explanatory variable X 1 , the temperature in that time zone is the explanatory variable X 2 , and the power demand in that time zone is the objective variable Z. A constant term γ and regression coefficients δ and ε of = γ + δX 1 + εX 2 are obtained from the least square method, and a demand prediction formula is derived for each time zone. Note that the method for deriving the demand prediction formula by regression analysis is not limited to this method, and can be changed as appropriate.

続いて、予測部１１は、時間帯別に、その時間帯の需要予測式に、その時間帯の天気予報情報および気温予報情報を入力して、時間帯別の需要予測を生成する。ここで、予測部１１は、需要予測式を導出する際に天気情報を数値化した方法と同じ方法で、天気予報情報を数値化してから用いる。   Subsequently, the prediction unit 11 inputs the weather forecast information and the temperature forecast information for the time zone into the demand forecast formula for the time zone for each time zone, and generates a demand forecast for each time zone. Here, the prediction unit 11 uses the weather forecast information after quantifying it in the same way as the method of quantifying the weather information when deriving the demand prediction formula.

計画部１２は、予測部１１が生成した発電予測および需要予測に基づいて、予測期間内の充放電器４による充放電の計画を立てる。なお、予測期間は、例えば、翌日の１時から２４時まででもよいし、当日の深夜（例えば、２２時など）から翌日の深夜（例えば、２２時まで）でもよい。また、計画部１２は、予測期間の直前に、その予測期間内の計画を立てることが望ましい。   The planning unit 12 makes a plan for charging / discharging by the charger / discharger 4 within the prediction period based on the power generation prediction and the demand prediction generated by the prediction unit 11. The prediction period may be, for example, from 1 o'clock to 24 o'clock on the next day, or may be from midnight on the same day (for example, 22:00) to midnight on the next day (for example, until 22:00). Moreover, it is desirable for the planning unit 12 to make a plan within the prediction period immediately before the prediction period.

制御部１３は、計画部１２が立てた充放電の計画に従って、充放電器４による充放電を制御する。   The control unit 13 controls charging / discharging by the charger / discharger 4 according to the charging / discharging plan established by the planning unit 12.

以下、計画部１２および制御部１３が行う具体的な処理について説明する。   Hereinafter, specific processing performed by the planning unit 12 and the control unit 13 will be described.

計画部１２は、余剰電力を蓄える効率を向上させて、逆潮流の最大値を小さくするための第一計画と、商用系統１０１からの電力のピークカットを行うための第二計画とのいずれかを立てる。なお、ピークカットとは、商用系統１０１からの電力を購入電力規定値以下にすることである。   The planning unit 12 is one of a first plan for improving the efficiency of storing surplus power and reducing the maximum value of the reverse power flow, and a second plan for performing peak cut of power from the commercial system 101. Stand up. Note that the peak cut is to make the power from the commercial system 101 less than or equal to the purchased power regulation value.

先ず、第一計画について説明する。   First, the first plan will be described.

（１）計画部１２は、予測部１１が生成した発電予測および需要予測の差を、予測期間内の時間帯ごとに計算する。計画部１２は、発電予測が需要予測より多い場合、その差を余剰電力として生成する。   (1) The planning unit 12 calculates the difference between the power generation prediction and the demand prediction generated by the prediction unit 11 for each time zone within the prediction period. When the power generation prediction is greater than the demand prediction, the planning unit 12 generates the difference as surplus power.

（２）計画部１２は、その各時間帯の余剰電力を積分して、予測期間内の余剰電力の総量を計算する。これにより、計画部１２は、発電予測が需要予測より多い時間帯ごとの発電予測と需要予測との差の総量を、余剰電力の総量として計算することになる。   (2) The planning unit 12 integrates the surplus power in each time zone, and calculates the total amount of surplus power within the prediction period. Thereby, the planning unit 12 calculates the total amount of the difference between the power generation prediction and the demand prediction for each time zone in which the power generation prediction is higher than the demand prediction as the total amount of surplus power.

（３）計画部１２は、充放電器４で計測された充電電力量と蓄電池１０３の定格容量との差を、蓄電池の空き容量として計算する。なお、定格容量は、計画部１２に予め設定されているものとする。   (3) The planning unit 12 calculates the difference between the charging power measured by the charger / discharger 4 and the rated capacity of the storage battery 103 as the free capacity of the storage battery. It is assumed that the rated capacity is preset in the planning unit 12.

（４）計画部１２は、余剰電力の総量と蓄電池の空き容量とを比較する。   (4) The planning unit 12 compares the total amount of surplus power with the free capacity of the storage battery.

計画部１２は、余剰電力の総量と蓄電池の空き容量との比較結果に基づいて、充放電の計画を以下の（Ａ）、（Ｂ１）および（Ｂ２）の３種類に分類し、その分類に応じた充放電の第一計画を立てる。   The planning unit 12 classifies the charging / discharging plans into the following three types (A), (B1), and (B2) based on the comparison result between the total amount of surplus power and the free capacity of the storage battery, and the classification is performed. Make a first plan for charging and discharging.

（Ａ）空き容量が余剰電力の総量以上の場合：
計画部１２は、余剰電力を蓄電池に充電し、それ以外の充放電を行わない計画を立てる。この場合、制御部１３は、分電盤３で計測される逆潮流量がゼロになるように、余剰電力を充放電器４に蓄電池１０３に対して充電させる。 (A) When the free space is equal to or greater than the total amount of surplus power:
The plan part 12 makes the plan which charges a storage battery with surplus electric power, and does not perform other charging / discharging. In this case, the control unit 13 causes the charger / discharger 4 to charge the storage battery 103 with surplus power so that the reverse flow rate measured by the distribution board 3 becomes zero.

（Ｂ）空き容量が余剰電力量の総量より小さい場合：
計画部１２は、空き容量と余剰電力量の総量との差に相当する差分電力量が、余剰電力が初めて発生する時間帯以前の需要予測の総量より大きいか否かを判断する。なお、余剰電力が初めて発生する時間帯は、発電予測が需要予測より多くなる余剰時間帯である。 (B) When the free space is smaller than the total amount of surplus power:
The planning unit 12 determines whether or not the differential power amount corresponding to the difference between the free capacity and the total amount of surplus power is greater than the total amount of demand prediction before the time zone when surplus power is generated for the first time. The time zone in which surplus power is generated for the first time is a surplus time zone in which the power generation prediction is greater than the demand prediction.

（Ｂ１）差分電力量が余剰時間帯以前の需要予測の総量以下の場合：
計画部１２は、余剰時間帯以前に、蓄電池１０３に充電された電力を家電１０２に放電することで、余剰電力を全て充電することが可能な空き容量が確保できると判断する。 (B1) When the difference power amount is equal to or less than the total amount of demand forecast before the surplus time zone:
The planning unit 12 determines that a free capacity capable of charging all the surplus power can be secured by discharging the power charged in the storage battery 103 to the home appliance 102 before the surplus time period.

そして、計画部１２は、余剰時間帯以前に、商用系統１０１への逆潮流が行われないように、充放電器４に放電させる計画を立てる。さらに言えば、計画部１２は、商用系統１０１からの購入電力量をゼロにし、充放電器４に蓄電池１０３から家電１０２に放電させる計画を立てる。ここで、計画部１２は、充放電器４に放電させる電力量の総量（以下、放電総量と称する）を、差分電力量と等しい量に決定する。   And the plan part 12 makes the plan which makes the charger / discharger 4 discharge before the surplus time slot | zone so that the reverse power flow to the commercial grid | system 101 may not be performed. Further, the planning unit 12 makes a plan for reducing the amount of purchased power from the commercial system 101 to zero and discharging the charger / discharger 4 from the storage battery 103 to the home appliance 102. Here, the planning unit 12 determines the total amount of power to be discharged to the charger / discharger 4 (hereinafter referred to as the total discharge amount) to an amount equal to the difference power amount.

この場合、制御部１３は、その決定された放電総量だけ放電されるまで、分電盤３で計測された逆潮流量が常にゼロになるように、充放電器４に放電させる。制御部１３は、その放電総量だけ放電させると、その後は、（Ａ）と同様に、分電盤３で計測される逆潮流量がゼロになるように、余剰電力を充放電器４に蓄電池１０３に対して充電させる。   In this case, the controller 13 causes the charger / discharger 4 to discharge so that the reverse flow rate measured by the distribution board 3 is always zero until the determined total discharge amount is discharged. When the control unit 13 discharges the total discharge amount, the surplus power is stored in the battery charger / discharger 4 so that the reverse power flow measured by the distribution board 3 becomes zero, as in (A). 103 is charged.

（Ｂ２）差分電力量が余剰時間帯以前の需要予測の総量より大きい場合：
計画部１２は、余剰時間帯以前に、蓄電池１０３に充電された電力を家電１０２に放電しても、余剰電力を全て充電することが可能な空き容量が確保できないと判断する。 (B2) When the difference power amount is larger than the total amount of demand forecast before the surplus time zone:
The planning unit 12 determines that even if the power charged in the storage battery 103 is discharged to the home appliance 102 before the surplus time period, it is not possible to secure a free capacity capable of charging all the surplus power.

そして、計画部１２は、余剰時間帯以前に蓄電池１０３から家電１０２への放電が行われ、かつ、商用系統１０１への逆潮流が行われるように、充放電器４に放電させる計画を立てる。さらに言えば、計画部１２は、所定時間あたりの逆潮流量を、一定かつ所定値以下になるように計画を立てる。ここで、計画部１２は、放電総量を、差分電力量と等しい量に決定する。また、計画部１２は、逆潮流量の総量を、差分電力量と余剰時間帯以前の需要電力量の総量との差に相当する分の電力量に決定する。   And the plan part 12 makes the plan to make the charger / discharger 4 discharge so that the discharge from the storage battery 103 to the home appliance 102 is performed before the surplus time zone and the reverse power flow to the commercial system 101 is performed. Furthermore, the planning unit 12 makes a plan so that the reverse flow rate per predetermined time is constant and not more than a predetermined value. Here, the planning unit 12 determines the total discharge amount to be equal to the difference power amount. In addition, the planning unit 12 determines the total amount of reverse power flow as the amount of power corresponding to the difference between the difference power amount and the total amount of demand power before the surplus time zone.

この場合、制御部１３は、余剰時間帯以前に蓄電池１０３から家電１０２への放電が行われ、かつ、商用系統１０１への逆潮流が行われるように、その決定された放電総量だけ充放電器４に放電させる。このとき、制御部１３は、分電盤３で計測された逆潮流量が一定かつ所定値以下になるように、逆潮流を制御する。   In this case, the control unit 13 charges / discharges the determined total discharge amount so that the discharge from the storage battery 103 to the home appliance 102 is performed before the surplus time period and the reverse power flow to the commercial system 101 is performed. 4 to discharge. At this time, the control unit 13 controls the reverse power flow so that the reverse power flow measured by the distribution board 3 is constant and not more than a predetermined value.

制御部１３は、その放電総量だけ放電させると、その後は、（Ａ）と同様に、分電盤３で計測される逆潮流量がゼロになるように、余剰電力を充放電器４に蓄電池１０３に対して充電させる。   When the control unit 13 discharges the total discharge amount, the surplus power is stored in the battery charger / discharger 4 so that the reverse power flow measured by the distribution board 3 becomes zero, as in (A). 103 is charged.

次に、第二計画について説明する。   Next, the second plan will be described.

（一）計画部１２は、予測部１１が生成した需要予測および購入電力規定値の差を時間帯ごとに計算する。計画部１２は、需要予測が購入電力規定値より大きい場合、その差をピーク電力とする。   (1) The planning unit 12 calculates the difference between the demand prediction generated by the prediction unit 11 and the purchased power regulation value for each time zone. When the demand forecast is greater than the purchased power regulation value, the planning unit 12 sets the difference as peak power.

（二）計画部１２は、その各時間帯のピーク電力を積分して、ピーク電力の総量を計算する。これにより、需要電力量が購入電力規定値より多い時間帯ごとの需要電力量と購入電力規定値との差の総量を、ピーク電力の総量として計算することになる。   (2) The planning unit 12 integrates the peak power in each time zone and calculates the total amount of peak power. Thereby, the total amount of the difference between the demand power amount and the purchase power prescribed value for each time zone in which the demand power amount is greater than the purchased power prescribed value is calculated as the total amount of peak power.

（三）計画部１２は、充放電器４で計測された最新の充電電力量と、ピーク電力の総量とを比較する。   (3) The planning unit 12 compares the latest charge power amount measured by the charger / discharger 4 with the total peak power amount.

計画部１２は、その充電電力量と、ピーク電力の総量との比較結果に基づいて、充放電の計画を以下の（α）および（β）の２種類に分類し、その分類に応じた充放電の第二計画を立てる。   The planning unit 12 classifies the charging / discharging plans into the following two types (α) and (β) based on the comparison result between the charging power amount and the total peak power, and charging / discharging according to the classification. Make a second plan of discharge.

（α）ピーク電力の総量が充電電力量より小さい場合：
計画部１２は、ピーク電力が発生する時間帯以前に、商用系統１０１からの電力の充電を行わない計画を立てる。この場合、制御部１３は、ピーク電力が発生する時間帯では、分電盤３にて計測されている購入電力量が購入電力規定値を超えないように、充放電器４に蓄電池１０３に対して放電させる。 (Α) When the total peak power is smaller than the charge power:
The planning unit 12 makes a plan not to charge the power from the commercial grid 101 before the time period when the peak power is generated. In this case, the control unit 13 causes the charger / discharger 4 to store the storage battery 103 so that the purchased power amount measured by the distribution board 3 does not exceed the purchased power specified value in the time zone when the peak power is generated. To discharge.

（β）ピーク電力の総量が充電電力量より大きい場合：
計画部１２は、ピーク電力が発生する時間帯以前に、商用系統１０１からの電力を充放電器４に蓄電池１０３に対して充電させる計画を立てる。ここで、計画部１２は、充放電器４に、充電電力量がピーク電力の総量と等しくなるように充電させる。 (Β) When the total peak power is larger than the charge power:
The plan part 12 makes the plan which makes the charger / discharger 4 charge the storage battery 103 with the power from the commercial system 101 before the time period when the peak power is generated. Here, the planning unit 12 causes the charger / discharger 4 to charge so that the amount of charging power becomes equal to the total amount of peak power.

次に動作を説明する。   Next, the operation will be described.

先ず、晴れの日に蓄電池が満充電に近いケースにおいて、逆潮流の最大値を小さくする際の動作を説明する。図２は、この動作例を説明するための説明図である。   First, in the case where the storage battery is nearly fully charged on a sunny day, the operation for reducing the maximum reverse power flow will be described. FIG. 2 is an explanatory diagram for explaining this operation example.

図２（ａ）において、電力需要２０１が棒グラフで示され、発電量２０２が折れ線グラフで示されている。電力需要２０１は、家電１０２で消費される消費電力量を示す。また、発電量２０２は、太陽電池１で発電される発電量を示す。   In Fig.2 (a), the electric power demand 201 is shown by the bar graph, and the electric power generation amount 202 is shown by the line graph. The power demand 201 indicates the amount of power consumed by the home appliance 102. The power generation amount 202 indicates the power generation amount generated by the solar cell 1.

電力需要２０１では、住宅１０６で人が活動する時間帯である、朝の時間帯と夕方から深夜までの時間帯で需要が大きい。また、発電量２０２は、日射量に比例して大きくなるため、通常、昼を中心とし山の形のカーブを描く。図２で示した日は、天気が晴れているため、１１時から１６時までの時間帯において、発電量２０２は電力需要２０１より大きくなっている。この電力需要２０１より大きい発電量が、図２（ｂ）で示した余剰電力となる。   In the electric power demand 201, the demand is large in the morning time zone and the time zone from evening to midnight, which are the time zones in which people are active in the house 106. Further, since the power generation amount 202 increases in proportion to the amount of solar radiation, it usually draws a mountain-shaped curve centering on daytime. Since the weather shown in FIG. 2 is sunny, the power generation amount 202 is greater than the power demand 201 in the time zone from 11:00 to 16:00. The amount of power generation that is greater than the power demand 201 is the surplus power shown in FIG.

その余剰電力は、蓄電池１０３に充電されるか、または、商用系統１０１に逆潮流される。この逆潮流は、商用系統１０１の電力品質を低下させる。このため、逆潮流量は、少ないか、または、全くないことが望ましい。つまり、余剰電力は、なるべく蓄電池１０３に充電されることが望ましい。   The surplus power is charged in the storage battery 103 or is reversely flowed to the commercial system 101. This reverse power flow reduces the power quality of the commercial system 101. For this reason, it is desirable that the reverse flow rate is small or not at all. That is, it is desirable that the surplus power is charged in the storage battery 103 as much as possible.

従来技術では、蓄電池では、余剰電力があれば、その余剰電力が充電され、一方、電力需要が規定値を超えれば、充電されている電力が放電される。このため、図２（ｃ）で示したように、蓄電池１０３が満充電に近い状態から、余剰電力の充電が開始されなければならないことがあった。図２（ｃ）で示した蓄電池１０３の状態では、余剰電力のうち、最初の１時間分の電力しか充電することができない。したがって、その後の余剰電力は、逆潮流される。その結果、商用系統１０１の電力品質を低下させることとなっていた。ここで、図２（ｄ）は、この逆潮流の量を示している。   In the prior art, if there is surplus power in the storage battery, the surplus power is charged, while if the power demand exceeds a specified value, the charged power is discharged. For this reason, as shown in FIG.2 (c), the charge of surplus electric power had to be started from the state in which the storage battery 103 is near full charge. In the state of the storage battery 103 shown in FIG. 2 (c), only the power for the first hour can be charged from the surplus power. Therefore, the surplus power thereafter is reversed. As a result, the power quality of the commercial system 101 has been reduced. Here, FIG. 2D shows the amount of the reverse power flow.

本実施形態では、先ず、予測部１１は、蓄積された実気象情報、発電量および需要電力量に基づいて、電力需要２０１および発電量２０２を予測して、翌日の時間帯別の需要予測および発電予測を生成する。   In the present embodiment, first, the prediction unit 11 predicts the power demand 201 and the power generation amount 202 based on the accumulated actual weather information, the power generation amount, and the power demand amount, Generate power generation predictions.

計画部１２は、発電予測および需要予測の差を、予測期間内の時間帯ごとに計算する。計画部１２は、発電予測が需要予測より多い場合、その差を余剰電力（図２（ｂ））として生成する。計画部１２は、その各時間帯の余剰電力を積分して、予測期間内の余剰電力の総量を計算する。そして、計画部１２は、充放電器４にて計測された充電電力量と蓄電池１０３の定格容量との差を計算して、蓄電池１０３の空き容量を求める。   The planning unit 12 calculates the difference between the power generation prediction and the demand prediction for each time zone within the prediction period. When the power generation prediction is greater than the demand prediction, the planning unit 12 generates the difference as surplus power (FIG. 2B). The planning unit 12 integrates the surplus power in each time zone and calculates the total amount of surplus power in the prediction period. Then, the planning unit 12 calculates the difference between the charging power measured by the charger / discharger 4 and the rated capacity of the storage battery 103 to obtain the free capacity of the storage battery 103.

続いて、計画部１２は、余剰電力の総量と蓄電池の空き容量とを比較して、空き容量が余剰電力の総量以上か否かを判断する。   Subsequently, the planning unit 12 compares the total amount of surplus power with the free capacity of the storage battery, and determines whether the free capacity is equal to or greater than the total amount of surplus power.

空き容量が余剰電力量の総量より小さい場合、計画部１２は、余剰電力を蓄電池に充電し、それ以外の充放電を行わない計画を立てる。この場合、制御部１３は、分電盤３で計測される逆潮流量がゼロになるように、余剰電力を充放電器４に蓄電池１０３に対して充電させる。   When the free capacity is smaller than the total amount of surplus power, the planning unit 12 makes a plan to charge surplus power to the storage battery and not perform other charge / discharge. In this case, the control unit 13 causes the charger / discharger 4 to charge the storage battery 103 with surplus power so that the reverse flow rate measured by the distribution board 3 becomes zero.

一方、空き容量が余剰電力量の総量より小さい場合、計画部１２は、空き容量と余剰電力量の総量との差に相当する差分電力量が、余剰時間帯以前の需要予測の総量より大きいか否かを判断する。   On the other hand, if the free capacity is smaller than the total amount of surplus power, the planning unit 12 determines whether the difference power amount corresponding to the difference between the free capacity and the total amount of surplus power is greater than the total amount of demand forecast before the surplus time zone. Judge whether or not.

差分電力量が余剰時間帯以前の需要予測の総量以下の場合、計画部１２は、余剰時間帯以前に、商用系統１０１への逆潮流が行われないように、充放電器４に放電させる計画を立てる。さらに言えば、計画部１２は、商用系統１０１からの購入電力量をゼロにし、充放電器４に蓄電池１０３から家電１０２に放電させる計画を立てる。ここで、計画部１２は、充放電器４に放電させる放電総量は、差分電力量と等しい量に決定する。   When the difference power amount is equal to or less than the total amount of demand forecast before the surplus time zone, the planning unit 12 causes the charger / discharger 4 to discharge so that the reverse power flow to the commercial system 101 is not performed before the surplus time zone. Stand up. Further, the planning unit 12 makes a plan for reducing the amount of purchased power from the commercial system 101 to zero and discharging the charger / discharger 4 from the storage battery 103 to the home appliance 102. Here, the planning unit 12 determines the total discharge amount to be discharged by the charger / discharger 4 to an amount equal to the difference power amount.

この場合、制御部１３は、その決定された放電総量だけ放電されるまで、分電盤３で計測された逆潮流量がゼロになるように、充放電器４に放電させる。   In this case, the controller 13 causes the charger / discharger 4 to discharge so that the reverse flow rate measured by the distribution board 3 becomes zero until the determined total discharge amount is discharged.

これにより、その放電が前日から行われるように予測期間が設定されていれば、図２（ｅ）で示したように、前日の放電により１時の充電電力量が図２（ｃ）で示した充電電力量より小さくすることができる。なお、図２（ｅ）では、１時から８時まで、蓄電池１０３の放電がさらに行われ、空き容量がさらに確保されている。したがって、余剰電力を全て蓄電池１０３に充電することが可能になるので（図２（ｅ）の１１時から１６時）、逆潮流を防止することが可能になる。   Thus, if the prediction period is set so that the discharge is performed from the previous day, as shown in FIG. 2 (e), the charge electric energy at 1 o'clock by the discharge of the previous day is shown in FIG. 2 (c). The amount of charging power can be made smaller. In FIG. 2 (e), the storage battery 103 is further discharged from 1 o'clock to 8 o'clock to further ensure free space. Therefore, since all the surplus power can be charged in the storage battery 103 (from 11:00 to 16:00 in FIG. 2 (e)), it becomes possible to prevent reverse power flow.

一方、差分電力量が余剰時間帯以前の需要予測の総量以下の場合、計画部１２は、余剰時間帯以前に蓄電池１０３から家電１０２への放電が行われ、かつ、商用系統１０１への逆潮流が行われるように、充放電器４に放電させる計画を立てる。さらに言えば、計画部１２は、所定時間あたりの逆潮流量を、一定かつ所定値以下になるように計画を立てる。ここで、計画部１２は、放電総量を、差分電力量と等しい量に決定する。また、計画部１２は、逆潮流量の総量を、差分電力量と余剰時間帯以前の需要電力量の総量との差に相当する分の電力量に決定する。   On the other hand, when the difference power amount is equal to or less than the total amount of demand forecast before the surplus time zone, the planning unit 12 discharges the storage battery 103 to the home appliance 102 before the surplus time zone, and the reverse power flow to the commercial system 101 A plan is made to cause the charger / discharger 4 to discharge. Furthermore, the planning unit 12 makes a plan so that the reverse flow rate per predetermined time is constant and not more than a predetermined value. Here, the planning unit 12 determines the total discharge amount to be equal to the difference power amount. In addition, the planning unit 12 determines the total amount of reverse power flow as the amount of power corresponding to the difference between the difference power amount and the total amount of demand power before the surplus time zone.

この場合、制御部１３は、余剰時間帯以前に蓄電池１０３から家電１０２への放電が行われ、かつ、商用系統１０１への逆潮流が行われるように、その決定された放電総量だけ充放電器４に放電させる。このとき、制御部１３は、分電盤３で計測された逆潮流量が一定かつ所定値以下になるように、逆潮流を制御する。   In this case, the control unit 13 charges / discharges the determined total discharge amount so that the discharge from the storage battery 103 to the home appliance 102 is performed before the surplus time period and the reverse power flow to the commercial system 101 is performed. 4 to discharge. At this time, the control unit 13 controls the reverse power flow so that the reverse power flow measured by the distribution board 3 is constant and not more than a predetermined value.

図２（ｆ）は、このときの逆潮流量を示した図である。図２（ｆ）において、逆潮流量は、従来技術の場合（図２（ｄ））と比べて、逆潮流量のピーク値を小さくすることが可能になる。したがって、商用系統１０１の品質劣化を軽減することが可能になる。   FIG. 2 (f) is a diagram showing the reverse flow rate at this time. In FIG. 2 (f), the reverse tide flow rate can make the peak value of the reverse tide flow rate smaller than in the case of the prior art (FIG. 2 (d)). Therefore, it is possible to reduce the quality deterioration of the commercial system 101.

次に、曇りもしくは雨の日に蓄電池が空に近いケースにおいて、商用系統１０１からの電力を購入電力規定値以下にするピークカットを行い、購入電力量を小さくする際の動作を説明する。図３は、この動作例を説明するための説明図である。   Next, in a case where the storage battery is nearly empty on a cloudy or rainy day, an operation for reducing the purchased power amount by performing peak cut to reduce the power from the commercial system 101 to a specified purchased power value or less will be described. FIG. 3 is an explanatory diagram for explaining this operation example.

図３（ａ）において、電力需要３０１が棒グラフで示され、発電量３０２が折れ線グラフで示されている。電力需要３０１は、家電１０２で消費される消費電力量を示す。また、発電量３０２は、太陽電池１で発電される発電量を示す。   In Fig.3 (a), the electric power demand 301 is shown by the bar graph, and the electric power generation amount 302 is shown by the line graph. The power demand 301 indicates the amount of power consumed by the home appliance 102. The power generation amount 302 indicates the power generation amount generated by the solar cell 1.

曇りもしくは雨の日は、日射量が少ないので、太陽電池の発電量３０２は小さい。図３（ａ）では、発電量３０２は、電力需要３０１に比べて小さい。   On cloudy or rainy days, the amount of solar radiation is small, so the power generation amount 302 of the solar cell is small. In FIG. 3A, the power generation amount 302 is smaller than the power demand 301.

従来技術では、発電量のうちの余剰電力量だけが充電されるため、図３（ａ）で示した状況では、蓄電池１０３への充電は行われない。また、消費電力量が購入電力規定値を超える１８時から２２時の時間帯においては、ピークカットを行うために、蓄電池１０３が放電され、その放電された電力が家電１０２に供給される。このとき、蓄電池１０３の充電電力量が、ピークカットに必要な電力量より少ない場合（図３（ｂ））、その充電電力量でピークカットを行うことが可能な時間は、最初の２時間のみである。このため、残りの時間のピークカットを行うための蓄電量がない（図２（ｃ））。したがって、家電１０２を動作させるために、商用系統１０１から購入電力規定値より大きい電力を購入することとなり（図３（ｄ））、電力コストが大きくなる。   In the prior art, only the surplus power amount of the power generation amount is charged, and thus the storage battery 103 is not charged in the situation shown in FIG. In addition, in the time zone from 18:00 to 22:00 when the power consumption exceeds the purchased power regulation value, the storage battery 103 is discharged and the discharged power is supplied to the home appliance 102 in order to perform peak cut. At this time, when the charge power amount of the storage battery 103 is smaller than the power amount necessary for the peak cut (FIG. 3B), the time during which the peak cut can be performed with the charge power amount is only the first two hours. It is. For this reason, there is no power storage amount for performing the peak cut of the remaining time (FIG.2 (c)). Therefore, in order to operate the home appliance 102, power larger than the purchased power regulation value is purchased from the commercial system 101 (FIG. 3 (d)), and the power cost increases.

本実施形態では、先ず、計画部１２は、予測部１１が生成した需要予測および購入電力規定値の差を時間帯ごとに計算する。計画部１２は、需要予測が購入電力規定値より大きい場合、その差をピーク電力とする。計画部１２は、その各時間帯のピーク電力を積分して、ピーク電力の総量を計算する。計画部１２は、充放電器４で計測された最新の充電電力量がその空き容量より大きいか否かを判断する。   In the present embodiment, the planning unit 12 first calculates the difference between the demand prediction generated by the prediction unit 11 and the purchased power regulation value for each time zone. When the demand forecast is greater than the purchased power regulation value, the planning unit 12 sets the difference as peak power. The planning unit 12 integrates the peak power in each time zone to calculate the total amount of peak power. The planning unit 12 determines whether or not the latest charge power amount measured by the charger / discharger 4 is larger than the free capacity.

ピーク電力の総量が充電電力量より大きい場合（図３（ａ））の場合、計画部１２は、ピークカットに必要な蓄電量を、ピーク電力が発生する時間帯以前（図３（ｅ））に確保するため、商用系統１０１からの電力を充放電器４に蓄電池１０３に対して充電を行う計画を立てる。これにより、ピークカットを行う時間帯には、ピークカットを行うための必要な電力量を蓄電池１０３から家電１０２に供給することができ（図２（ｆ））、商用系統１０１から購入する電力量を購入電力規定値以下に保つことができる（図２（ｇ））。   In the case where the total amount of peak power is larger than the amount of charged power (FIG. 3A), the planning unit 12 sets the amount of power necessary for peak cut before the time zone when peak power occurs (FIG. 3E). Therefore, a plan is made to charge the battery 103 to the charger / discharger 4 with the electric power from the commercial system 101. As a result, during the time period during which peak cut is performed, the amount of power necessary for performing peak cut can be supplied from the storage battery 103 to the home appliance 102 (FIG. 2 (f)), and the amount of power purchased from the commercial grid 101. Can be kept below the specified power purchase value (FIG. 2 (g)).

次に購入電力規定値の設定について説明する。   Next, setting of the purchased power prescribed value will be described.

計画部１２は、予測期間内のピーク電力の総量が蓄電池の容量以下となるように、その予測期間の購入電力規定値を求め、その求めた購入電力規定値を設定する。これは、充電する計画と放電する計画とが同時に立てられることを防止するためである。   The planning unit 12 obtains a purchase power prescribed value for the prediction period so that the total amount of peak power within the prediction period is equal to or less than the capacity of the storage battery, and sets the obtained purchase power prescribed value. This is to prevent the plan for charging and the plan for discharging from being made simultaneously.

以下、その理由を説明する。   The reason will be described below.

充電する計画と放電する計画とが同時に立てられる可能性があるのは、余剰電力を蓄電池１０３に充電し、蓄電池１０３が満充電となった後でも、ピークカットを行うために必要な蓄電池１０３から放電する電力量が過大なために、蓄電池１０３の充電電力量が不足する状況である。図４は、この状況を示した説明図である。   There is a possibility that the plan to charge and the plan to discharge are made at the same time because the surplus power is charged in the storage battery 103 and the storage battery 103 is fully charged, and therefore the storage battery 103 is required to perform peak cut. Since the amount of electric power to be discharged is excessive, the charging electric energy of the storage battery 103 is insufficient. FIG. 4 is an explanatory diagram showing this situation.

この状況に対して第二計画が立てられ、蓄電池１０３に充電できる最大の電力量が蓄電池１０３に蓄えられても、ピークカットを行うために必要な電力量をまかなうことができない。   Even if the second plan is made for this situation and the maximum amount of power that can be charged in the storage battery 103 is stored in the storage battery 103, the amount of power necessary to perform the peak cut cannot be covered.

そこで、購入電力規定値を適切な値に設定することが必要となる。具体的には、蓄電池１０３が満充電の状態からピークカットを行った場合において、蓄電池の充電電力量が不足しないように、購入電力規定値は、ピーク電力の総量が蓄電池の容量以下となるように設定されることが必要となる。   Therefore, it is necessary to set the purchased power prescribed value to an appropriate value. Specifically, when the peak cut is performed from the fully charged state of the storage battery 103, the purchased power regulation value is set so that the total peak power is equal to or less than the capacity of the storage battery so that the charged power amount of the storage battery is not insufficient. It is necessary to be set to.

この場合、充電する計画と放電する計画とが同時に立てられることはなく、その日の最初の蓄電池の充電状態は過剰か不足かのどちらかであり、行われる制御も放電か充電かのどちらかになる。   In this case, the plan to charge and the plan to discharge are not made at the same time, the charge state of the first storage battery of the day is either excessive or insufficient, and the control to be performed is either discharge or charge Become.

次に効果を説明する。   Next, the effect will be described.

太陽電池１は、照射される光の量に応じて電力を発電する。充放電器４は、蓄電池１０３に対する充放電を行い、また、蓄電池１０３に充電されている充電電力量を計測する。予測部１１は、太陽電池１で発電される発電量、および、家電１０２で消費される需要電力量を予測する。計画部１２は、予測部１１が予測した発電量および需要電力量と、充放電器４が計測した充電電力量とに基づいて、充放電器４による充放電の計画を立てる。制御部１３は、計画部１２が立てた計画に従って、充放電器４による充放電を制御する。   The solar cell 1 generates electric power according to the amount of light irradiated. The charger / discharger 4 charges and discharges the storage battery 103 and measures the amount of charging power charged in the storage battery 103. The prediction unit 11 predicts the amount of power generated by the solar cell 1 and the amount of power demand consumed by the home appliance 102. The planning unit 12 makes a plan for charging / discharging by the charger / discharger 4 based on the power generation amount and demand power amount predicted by the prediction unit 11 and the charging power amount measured by the charger / discharger 4. The control unit 13 controls charging / discharging by the charger / discharger 4 according to the plan established by the planning unit 12.

この場合、充放電器４による蓄電池１０３に対する充放電が、予測された発電量および需要電力量と、計測された充電電力量とに基づいて制御される。   In this case, charging / discharging with respect to the storage battery 103 by the charger / discharger 4 is controlled based on the predicted power generation amount and demand power amount and the measured charging power amount.

したがって、発電量が多いと予測される場合には、発電量が多くなる前に、蓄電池１０３を放電させて蓄電池１０３の空き容量を多くすることが可能になる。よって、余剰電力を蓄える容量を確保することが可能になり、余剰電力を蓄える効率を向上させることが可能になる。また、発電量が少ないと予測される場合には、需要電力量が多くなる前に、蓄電池１０３を充電させて電力を多く蓄電させることが可能になる。よって、その蓄電された電力が、需要電力が多いときに放電されれば、商用系統１０１からのピークカットを行うことが可能になる。   Therefore, when it is predicted that the power generation amount is large, it is possible to discharge the storage battery 103 and increase the free capacity of the storage battery 103 before the power generation amount increases. Therefore, it is possible to secure a capacity for storing surplus power, and it is possible to improve efficiency for storing surplus power. Further, when it is predicted that the power generation amount is small, it is possible to charge the storage battery 103 and store a large amount of power before the demand power amount increases. Therefore, if the stored electric power is discharged when the demand power is large, it is possible to perform peak cut from the commercial system 101.

また、本実施形態では、予測部１１は、発電量および需要電力量を時間帯別に予測する。計画部１２は、その発電量が需要電力量より多い時間帯ごとの発電量と需要電力量との差の総量を、余剰電力総量として計算する。また、計画部１２は、蓄電池１０３の充電電力量と蓄電池１０３の定格容量との差を、蓄電池１０３の空き容量として計算する。そして、計画部１２は、空き容量が余剰電力総量より小さい場合、発電量が需要電力量より多くなる余剰時間帯以前に、空き容量および余剰電力総量の差に相当する差分電力量を、充放電器４に放電させる計画を立てる。   In the present embodiment, the prediction unit 11 predicts the power generation amount and the demand power amount for each time zone. The planning unit 12 calculates the total amount of difference between the power generation amount and the demand power amount for each time zone in which the power generation amount is larger than the demand power amount as the surplus power total amount. In addition, the planning unit 12 calculates the difference between the charged power amount of the storage battery 103 and the rated capacity of the storage battery 103 as the free capacity of the storage battery 103. Then, when the free capacity is smaller than the surplus power total amount, the planning unit 12 discharges the difference power amount corresponding to the difference between the free capacity and the surplus power total amount before the surplus time period when the power generation amount is larger than the demand power amount. Make a plan to cause the electric appliance 4 to discharge.

この場合、空き容量が余剰電力総量より小さい場合、発電量が需要電力量より多くなる余剰時間帯以前に、空き容量および余剰電力総量の差に相当する差分電力量が、充放電器４から放電される。したがって、的確に余剰電力を蓄える容量を確保することが可能になり、余剰電力を蓄える効率を向上させることが可能になる。   In this case, when the free capacity is smaller than the surplus power total amount, the difference power amount corresponding to the difference between the free capacity and the surplus power total amount is discharged from the charger / discharger 4 before the surplus time period when the power generation amount is larger than the demand power amount. Is done. Therefore, it becomes possible to secure a capacity for storing surplus power accurately, and it is possible to improve the efficiency of storing surplus power.

また、本実施形態では、計画部１２は、空き容量が余剰電力総量より小さい場合、差分電力量が余剰時間帯以前の需要電力量の総量以下であると、逆潮流が行われないように、差分電力量を充放電器４に放電させる計画を立てる。一方、計画部１２は、差分電力量が余剰時間帯以前の需要電力量の総量より大きいと、差分電力量と余剰時間帯以前の需要電力量の総量との差に相当する分の電力量だけ逆潮流が行われるように、差分電力量を充放電器４に放電させる計画を立てる。   Moreover, in this embodiment, when the free space is smaller than the surplus power total amount, the planning unit 12 prevents the reverse power flow from being performed if the difference power amount is equal to or less than the total amount of demand power before the surplus time zone. A plan is made to cause the charger / discharger 4 to discharge the difference power amount. On the other hand, when the difference power amount is larger than the total amount of demand power before the surplus time zone, the planning unit 12 only has a power amount corresponding to the difference between the difference power amount and the total amount of demand power before the surplus time zone. A plan is made to cause the charger / discharger 4 to discharge the differential electric energy so that the reverse power flow is performed.

この場合、差分電力量の全てを家電１０２で消費することが可能な場合には、逆潮流が行われない。また、差分電力量の全てを家電１０２で消費することが可能でない場合、差分電力量のうち、家電１０２で消費しきれない電力だけを逆潮流することが可能になる。したがって、逆潮流量を低減することが可能になり、商用系統１０１の品質劣化を抑制することが可能になる。   In this case, when all of the difference power amount can be consumed by the home appliance 102, the reverse power flow is not performed. In addition, when it is not possible to consume all of the difference power amount at the home appliance 102, it is possible to reversely flow only the power that cannot be consumed by the home appliance 102 out of the difference power amount. Therefore, it becomes possible to reduce a reverse tidal flow, and to suppress quality deterioration of the commercial system 101.

また、本実施形態では、計画部１２は、需要電力量が購入電力規定値より多い時間帯ごとの需要電力量と購入電力規定値との差の総量を、ピーク電力の総量として計算する。そして、計画部１２は、ピーク電力の総量が充電電力量より大きい場合、需要電力量が規定値より多くなる時間帯以前に、充電電力がピーク電力の総量と等しくなるように、充放電器４に放電させる。   Moreover, in this embodiment, the plan part 12 calculates the total amount of the difference of the demand power amount for every time zone when the demand power amount is larger than the purchased power specified value and the purchased power specified value as the total amount of peak power. And when the total amount of peak electric power is larger than charging electric energy, the plan part 12 is the charger / discharger 4 so that charging electric power may become equal to the total amount of peak electric power before the time when demand electric energy exceeds a regulation value. To discharge.

この場合、余剰電力を蓄える容量を確保することが可能になり、余剰電力を蓄える効率を向上させることが可能になる。   In this case, it is possible to secure a capacity for storing surplus power, and it is possible to improve efficiency for storing surplus power.

以上説明した各実施形態において、図示した構成は単なる一例であって、本発明はその構成に限定されるものではない。   In each embodiment described above, the illustrated configuration is merely an example, and the present invention is not limited to the configuration.

例えば、電力負荷として家電を用いて説明したが、電力負荷は、家電に限らず適宜変更可能である。   For example, although explained using household appliances as electric power load, electric power load can be suitably changed not only in household appliances.

本発明の一実施形態の電力システムを示したブロック図である。It is the block diagram which showed the electric power system of one Embodiment of this invention. 逆潮流の最大値を小さくする際の動作例を説明するための説明図である。It is explanatory drawing for demonstrating the operation example at the time of making the maximum value of a reverse power flow small. 商用系統からの電力のピークカットを行う際の動作例を説明するための説明図である。It is explanatory drawing for demonstrating the operation example at the time of performing the peak cut of the electric power from a commercial system | strain. 蓄電池が満充電となった後でも、ピークカットを行うために必要な電力量が過大なために、蓄電池の充電電力量が不足する状況を示した説明図である。It is explanatory drawing which showed the condition where the electric energy required in order to perform peak cut is excessive, and the charging electric energy of a storage battery is insufficient even after a storage battery becomes a full charge.

符号の説明Explanation of symbols

１ 太陽電池
２ 変換器
３ 分電盤
４ 充放電器
５ 制御端末
１１ 予測部
１２ 計画部
１３ 制御部
１０１ 商用系統
１０２ 家電
１０３ 蓄電池
１０４ サーバ DESCRIPTION OF SYMBOLS 1 Solar cell 2 Converter 3 Distribution board 4 Charger / discharger 5 Control terminal 11 Prediction part 12 Planning part 13 Control part 101 Commercial system 102 Home appliance 103 Storage battery 104 Server

Claims (8)

電力負荷、電力系統および蓄電池に接続可能な電力システムであって、
照射される光の量に応じて電力を発電する太陽電池と、
前記蓄電池に対する充放電を行い、また、前記蓄電池に充電されている充電電力量を計測する充放電器と、
前記充放電器が放電する際には、該放電された電力と、前記電力系統からの電力と、前記太陽電池にて発電された電力と、を前記電力負荷に供給し、また、前記充放電器が充電する際には、前記電力系統からの電力と、前記太陽電池にて発電された電力と、を前記電力負荷および充放電器に供給する分電盤と、
前記太陽電池で発電される発電量、および、前記電力負荷で消費される需要電力量を予測する予測部と、
前記予測部が予測した発電量および需要電力量と、前記充放電器が計測した充電電力量とに基づいて、前記充放電器による充放電の計画を立てる計画部と、
前記計画部が立てた計画に従って、前記充放電器による充放電を制御する制御部と、を含む電力システム。 A power system connectable to a power load, a power system and a storage battery,
A solar cell that generates electric power according to the amount of light irradiated;
A charger / discharger that charges and discharges the storage battery and measures the amount of charge power charged in the storage battery;
When the charger / discharger discharges, the discharged electric power, the electric power from the electric power system, and the electric power generated by the solar cell are supplied to the electric power load, and the charging / discharging is performed. When the electric appliance is charged, the distribution board for supplying the electric power from the electric power system and the electric power generated by the solar cell to the electric power load and the charger / discharger,
A prediction unit that predicts the amount of power generated by the solar cell and the amount of power demand consumed by the power load;
Based on the power generation amount and demand power amount predicted by the prediction unit, and the charging power amount measured by the charger / discharger, a planning unit that plans charging / discharging by the charger / discharger,
And a control unit that controls charging / discharging by the charger / discharger according to a plan established by the planning unit. 請求項１に記載の電力システムにおいて、
前記予測部は、前記発電量および前記需要電力量を時間帯別に予測し、
前記計画部は、前記発電量が前記需要電力量より多い時間帯ごとの、前記発電量と前記需要電力量と差の総量を、余剰電力総量として計算し、また、前記充電電力量と前記蓄電池の定格容量との差を、前記蓄電池の空き容量として計算し、前記空き容量が前記余剰電力総量より小さい場合、前記発電量が前記需要電力量より多くなる余剰時間帯以前に、前記空き容量と前記余剰電力総量との差に相当する差分電力量を、前記充放電器に放電させる計画を立てる、電力システム。 The power system according to claim 1,
The prediction unit predicts the power generation amount and the demand power amount according to time zones,
The planning unit calculates, as a surplus power total amount, a total amount of difference between the power generation amount and the demand power amount for each time zone in which the power generation amount is larger than the demand power amount, and the charging power amount and the storage battery Difference from the rated capacity of the storage battery is calculated as the free capacity of the storage battery, and when the free capacity is smaller than the total surplus power, the free capacity and the free capacity before the surplus time period when the power generation amount is greater than the demand power amount. The electric power system which makes the plan which makes the said charger / discharger discharge the difference electric energy equivalent to the difference with the said surplus electric power total amount. 請求項２に記載の電力システムにおいて、
前記分電盤は、前記充放電器にて放電されている放電電力量が、前記電力負荷で消費されている現消費電力量より多い場合、前記放電電力量と前記現消費電力量との差に相当する電力量の前記電力系統への逆潮流を行い、
前記計画部は、前記空き容量が前記余剰電力総量より小さい場合、前記差分電力量が前記余剰時間帯以前の前記需要電力量の総量以下であると、前記逆潮流が行われないように、前記差分電力量を前記充放電器に放電させる計画を立て、前記差分電力量が前記余剰時間帯以前の前記需要電力量の総量より大きいと、前記差分電力量と前記余剰時間帯以前の前記需要電力量の総量との差に相当する電力量だけ前記逆潮流が行われるように、前記差分電力量を前記充放電器に放電させる計画を立てる、電力システム。 The power system according to claim 2,
The distribution board has a difference between the discharge power amount and the current power consumption amount when the discharge power amount discharged by the charger / discharger is larger than the current power consumption amount consumed by the power load. Reverse power flow to the power system with the amount of power equivalent to
The planning unit, when the free capacity is smaller than the surplus power total amount, if the difference power amount is less than or equal to the total amount of demand power before the surplus time zone, the reverse power flow is not performed, If a plan is made to discharge the difference power amount to the charger / discharger, and the difference power amount is larger than the total amount of the demand power amount before the surplus time zone, the difference power amount and the demand power before the surplus time zone The electric power system which makes the plan which discharges the said difference electric energy to the said charger / discharger so that the said reverse power flow may be performed only for the electric energy corresponding to the difference with the total amount of quantity. 請求項２または３に記載の電力システムにおいて、
前記計画部は、前記需要電力量が予め設定された規定値より多い時間帯ごとの、前記需要電力量と前記規定値との差の総量を、ピーク電力総量として計算し、前記ピーク電力総量が前記充電電力量より大きい場合、前記需要電力量が前記規定値より多くなる時間帯以前に、前記充電電力量が前記ピーク電力総量と等しくなるように、前記充放電器に充電させる計画を立てる、電力システム。 In the electric power system according to claim 2 or 3,
The planning unit calculates, as a peak power total amount, a total amount of difference between the demand power amount and the specified value for each time zone in which the demand power amount is greater than a preset specified value, and the peak power total amount is If it is greater than the charge power amount, a plan is made to charge the charger / discharger so that the charge power amount becomes equal to the total peak power amount before the time when the demand power amount is greater than the specified value. Power system. 照射される光の量に応じて電力を発電する太陽電池と、蓄電池に対する充放電を行う充放電器と、前記充放電器が放電する際には、該放電された電力と電力系統からの電力と前記太陽電池にて発電された電力とを電力負荷に供給し、また、前記充放電器が充電する際には、前記電力系統からの電力と前記太陽電池にて発電された電力とを前記電力負荷および充放電器に供給する分電盤と、を含む電力システムの制御方法であって、
前記蓄電池に充電されている充電電力量を計測する計測ステップと、
前記太陽電池で発電される発電量、および、前記電力負荷で消費される需要電力量を予測する予測ステップと、
前記予測された発電量および需要電力量と、前記計測された充電電力量とに基づいて、前記充放電器による充放電の計画を立てる立案ステップと、
前記立てられた計画に従って、前記充放電器による充放電を制御する制御ステップと、を含む電力システムの制御方法。 A solar cell that generates power according to the amount of light irradiated, a charger / discharger that charges and discharges the storage battery, and when the charger / discharger discharges, the discharged power and power from the power system And the power generated by the solar cell is supplied to a power load, and when the charger / discharger is charged, the power from the power system and the power generated by the solar cell are A power distribution board that supplies power load and a charger / discharger;
A measurement step of measuring the amount of charging power charged in the storage battery;
A prediction step of predicting the amount of power generated by the solar cell and the amount of power demand consumed by the power load;
A planning step of making a plan for charging / discharging by the charger / discharger based on the predicted power generation amount and power demand amount and the measured charging power amount;
And a control step of controlling charging / discharging by the charger / discharger in accordance with the established plan. 請求項５に記載の電力システムの制御方法において、
前記予測ステップでは、前記発電量および前記需要電力量を時間帯別に予測し、
前記立案ステップは、
前記発電量が前記需要電力量より多い時間帯ごとの、前記発電量と前記需要電力量との差の総量を、余剰電力総量として計算する第一計算ステップと、
前記充電電力量と前記蓄電池の定格容量との差を、前記蓄電池の空き容量として計算する第二計算ステップと、
前記空き容量が前記余剰電力総量より小さい場合、前記発電量が前記需要電力量より多くなる余剰時間帯以前に、前記空き容量と前記余剰電力総量との差に相当する差分電力量を前記充放電器に放電させる計画を立てる第一計画ステップと、を含む、電力システムの制御方法。 The power system control method according to claim 5,
In the prediction step, the power generation amount and the demand power amount are predicted for each time zone,
The planning step includes
A first calculation step of calculating, as a surplus power total amount, a total amount of difference between the power generation amount and the demand power amount for each time zone in which the power generation amount is greater than the demand power amount;
A second calculation step of calculating a difference between the charged power amount and the rated capacity of the storage battery as an empty capacity of the storage battery;
When the free capacity is smaller than the total surplus power, the charging / discharging of the differential power corresponding to the difference between the free capacity and the total surplus power is performed before the surplus time period in which the power generation amount is greater than the demand power. And a first planning step for making a plan for causing the electric device to discharge. 請求項６に記載の電力システムの制御方法において、
前記分電盤は、前記充放電器にて放電されている放電電力量が、前記電力負荷で消費されている消費電力量より多い場合、前記放電電力量と前記消費電力量との差に相当する電力量の前記電力系統への逆潮流を行い、
前記第一計画ステップでは、前記空き容量が前記余剰電力総量より小さい場合、前記差分電力量が前記余剰時間帯以前の前記需要電力量の総量以下であると、前記逆潮流が行われないように、前記差分電力量を前記充放電器に放電させる計画を立て、前記差分電力量が前記余剰時間帯以前の前記需要電力量の総量より大きいと、前記差分電力量と前記余剰時間帯以前の前記需要電力量の総量との差に相当する電力量だけ前記逆潮流が行われるように、前記差分電力量を前記充放電器に放電させる計画を立てる、電力システムの制御方法。 The power system control method according to claim 6,
The distribution board corresponds to a difference between the discharge power amount and the power consumption amount when the discharge power amount discharged by the charger / discharger is larger than the power consumption amount consumed by the power load. Reverse power flow to the power system
In the first planning step, when the free capacity is smaller than the surplus power total amount, the reverse power flow is not performed when the difference power amount is equal to or less than the total amount of the demand power amount before the surplus time zone. , Make a plan to discharge the difference power amount to the charger / discharger, and if the difference power amount is larger than the total amount of the demand power amount before the surplus time zone, the difference power amount and the surplus time zone before A method for controlling an electric power system, wherein a plan is made to cause the charger / discharger to discharge the difference power amount so that the reverse flow is performed by an amount of power corresponding to a difference from a total amount of demand power amount. 請求項６または７に記載の電力システムの制御方法において、
前記立案ステップは、
前記需要電力量が予め設定された規定値より多い時間帯ごとの、前記需要電力量と前記規定値との差の総量を、ピーク電力総量として計算する第三計算ステップと、
前記ピーク電力総量が前記空き容量より大きい場合、前記需要電力量が前記規定値より多くなる時間帯以前に、前記空き容量が前記ピーク電力総量以下になるように、前記充放電器に放電させる計画を立てる、第二計画ステップと、を含む、電力システムの制御方法。 In the control method of the electric power system according to claim 6 or 7,
The planning step includes
A third calculation step of calculating, as a peak power total amount, a total amount of difference between the demand power amount and the specified value for each time zone in which the demand power amount is greater than a preset specified value;
When the total peak power is larger than the available capacity, the charger / discharger is discharged so that the available capacity becomes equal to or less than the total peak power before the time when the demand power is greater than the specified value. And a second planning step. A method for controlling the power system.
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