JP2004015035A - Home power generation system - Google Patents

Home power generation system Download PDF

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Publication number
JP2004015035A
JP2004015035A JP2002170880A JP2002170880A JP2004015035A JP 2004015035 A JP2004015035 A JP 2004015035A JP 2002170880 A JP2002170880 A JP 2002170880A JP 2002170880 A JP2002170880 A JP 2002170880A JP 2004015035 A JP2004015035 A JP 2004015035A
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JP
Japan
Prior art keywords
power
home
inverter
power supply
generation system
Prior art date
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Pending
Application number
JP2002170880A
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Japanese (ja)
Inventor
Shinichi Nakane
中根　伸一
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Priority to JP2002170880A priority Critical patent/JP2004015035A/en
Publication of JP2004015035A publication Critical patent/JP2004015035A/en
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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
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a home power generation system for supplying power from an inverter to predetermined home power distributing equipment when power failes in a power company side power distributing facility. <P>SOLUTION: This home power generation system is configured of a battery such as a solar cell 1 or a fuel cell, a system cooperative inverter 3 for converting the DC output power from the battery into AC power, and a control part 14 for controlling preliminarily set home power supply parts when a commercial power to be supplied from the system stops. When the power supply from the power company 5 stops, the power supply from the inverter 3 to a system power distributing equipment 6 is stopped, and the power from the inverter 3 is supplied to the set home power supply parts. Thus, it is not necessary to re-connect any electric equipment to an exclusive power outlet to use this system. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は太陽光発電あるいは燃料電池発電などの家庭用発電システムに関するものである。
【０００２】
【従来の技術】
従来、この種の家庭用発電システムとしては、図２に示すものがある。
【０００３】
図２において、１は太陽電池、２は太陽電池１からの配線を一括接続する接続箱、３は太陽電池１からの直流出力電力を交流電力に変換すると共に系統連系されたインバータ、４は分電盤、５は電力会社、６は系統の電力配電設備、７は太陽電池１で発電した電力を電力会社５へ売るための売電メータ、８は電力会社５からの購入電力を積算する買電メータ、９，１０は電気機器、１１，１２は前記電気機器９，１０へ電力を供給する家庭内の配電設備、１３は系統からの電力供給が停止時、すなわち停電時のインバータ３の自立運転での専用コンセントである。
【０００４】
【発明が解決しようとする課題】
しかしながら、前記従来の構成では、系統の電力配電設備６に異常が生じた場合、あるいは配電設備工事の場合など、ユーザー側への電力供給が停止になった、すなわち停電になったときには、系統連系されているインバータ３が停電を検出して配電系統への売電を停止しなくてはならない上、この状態でインバータ３を稼動させる場合には独立運転モードとなり、専用コンセント１３からしか電力供給できないという課題を有していた。
【０００５】
本発明は、前記従来の課題を解決するもので、電力会社側の電力配電設備に停電があった場合には確実に各ユーザー宅からの売電を停止すると共に、インバータを駆動させ所定の電気機器に電力供給することができる家庭用発電システムを提供することを目的とする。
【０００６】
【課題を解決するための手段】
前記目的を達成するために、本発明の家庭用発電システムは、太陽電池あるいは燃料電池などの電池と、前記電池からの直流出力電力を交流電力に変換すると共に系統連系されたインバータと、前記系統から供給される商用電力が停止した場合予め設定された家庭内の電力供給箇所を制御する制御部を備えたものである。
【０００７】
これによって、電力会社からの電力供給が停止した場合には、売電する出力系統への動作を停止すべく制御するので、停電時に配電設備に電力が供給されっ放しになることはなく、また、駆動するインバータ出力は予め設定された家庭内の電力供給箇所に供給され、所定の電気機器を駆動することができるのである。
【０００８】
【発明の実施の形態】
請求項１に記載の発明は、太陽電池あるいは燃料電池などの電池と、前記電池からの直流出力電力を交流電力に変換すると共に系統連系されたインバータと、前記系統から供給される商用電力が停止した場合予め設定された家庭内の電力供給箇所を制御する制御部を備えてなる家庭用発電システムとすることにより、停電時でも通常の家庭内配電設備に接続された電機機器に優先的に通電されるので、いちいち専用コンセントに電気機器を接続し直す必要がなく非常に使い勝手のよい発電システムになる。
【０００９】
請求項２に記載の発明は、インバータの出力電力を蓄積する蓄電部を有し、前記蓄電部の蓄電量に応じて電力供給箇所を制御する制御部からなる請求項１に記載の家庭用発電システムとすることにより、太陽光発電システムの場合夜間に発電されない状態でも、蓄電部の蓄電量に応じて所定の電気機器には通電され使用することができる。
【００１０】
請求項３に記載の発明は、制御部は家庭内の電力供給箇所を設定可変する設定部を備えた請求項１または２に記載の家庭用発電システムとすることにより、家庭内の配電設備に接続される電気機器の変更時に常に所定の機器への通電を優先すべく自由に可変できる。
【００１１】
請求項４に記載の発明は、制御部は蓄電量の変化に従って家庭内の電力供給箇所を変更する請求項１〜３のいずれか１項に記載の家庭用発電システムとすることにより、蓄電量が減少時には所定の小さな負荷電力機器へ通電することにより有効に蓄電部を作用させることができる。
【００１２】
請求項５に記載の発明は、設定部は家庭内の電力供給個所の優先順序を設定できる請求項３に記載の家庭用発電システムとすることにより、電気機器の接続場所を変更した場合にも適切に対応することができる。
【００１３】
【実施例】
以下本発明の実施例について、図１を参照しながら説明する。
【００１４】
図は本発明の実施例における家庭用発電システムを示すものであり、図２に示したものと同一構成要素は同一符号を付して説明を省略する。
【００１５】
図において、１４は制御部で、系統の電力配電設備６から供給される商用電力が停止した場合、予め設定された家庭内の電力供給箇所１５，１６を制御すると共に、インバータ３の出力電力を蓄積する蓄電部１７の蓄電量の変化に従って家庭内の電力供給箇所１５，１６を変更制御する。
【００１６】
また、制御部１４は、電力供給個所１５，１６などの優先順序を設定できる設定部も内蔵している。この制御部１４は、インバータ３、分電盤４、家庭内の電力供給箇所１５，１６および蓄電部１７と、情報信号あるいは制御信号の送受を行い、前記の制御を実現している。
【００１７】
以上のように構成された家庭用発電システムについて、以下その動作、作用を説明する。
【００１８】
まず、電力配電設備６に異常などがあった場合には、電力会社５からの送電は中断され、すなわち停電となる。この商用電源が送電されないことをインバータ３が検知し、その信号を制御部１４が受けて、分電盤４内の交流開閉器を開状態にし電力配電設備６への逆潮流を防止する。さらに制御部１４は、予め設定された家庭内の電力供給箇所１５あるいは１６の家庭内配電設備制御部を制御し、インバータ３からの電力を所定の個所へ供給する。
【００１９】
また、蓄電部１７にはインバータ３で発電された電力が蓄電される。この蓄電量によって、家庭内の電力供給箇所１５，１６に接続された電気機器９，１０の消費電力に応じて、すなわち前記消費電力情報を基に順序設定された供給個所に電力供給制御されるのである。これらの優先順序を設定できる機能は制御部１４の設定部に内蔵され、電気機器情報から使用者が自由に設定変更可能となるのである。
【００２０】
以上のように、本実施例においては、電力会社５からの送電が停止する、すなわち停電すると、家庭内の発電設備、すなわち太陽電池１、接続箱２、インバータ３から商用の電力配電設備６への売電を止め、インバータ３で発電される電力、あるいは蓄電された電力を、予め設定された家庭内の電力供給箇所１５，１６に供給し、所定の電気機器９，１０を駆動することができるという効果を有する。
【００２１】
さらに、インバータ３が駆動できない状態では、蓄電部１７に蓄えられた電力を利用し設定された優先順序に従って、家庭内配電設備への電力供給を行うので、夜間など太陽電池１での発電が不可能な時間帯でも所定の電気機器９，１０への電力供給が可能となるのである。
【００２２】
また、本実施例では、電池を太陽電池１としたが、燃料電池などのコジェネシステムでも同様の効果を奏することができるのである。
【００２３】
さらに本実施例では、家庭内の電力供給個所が２箇所の例を示したが、もっと複数の場合でも予め優先順序を設定することにより、所望の電気機器が接続された任意の家庭内配電設備制御部を稼動させる、すなわち所定の電気機器への給電が可能となるのである。
【００２４】
さらに本実施例では、家庭内配電設備制御部を電気機器のすぐ近傍に設置した例、すなわちコンセント近傍に設置した例を示したが、分電盤４内の配電系統毎に制御すべく構成することも可能である。この場合は、機器毎の電力供給制御ではなく、配電系統毎の制御になる。
【００２５】
ここでは、停電時の作用のみを説明したが、電力会社の配電設備の停電が解除された場合には、通常系統連係機器の復帰処理と同様の過程を経て、家庭内の配電設備に電力が供給されるのである。
【００２６】
【発明の効果】
以上のように、本発明によれば、電力会社側の配電設備に停電があった場合には確実に各ユーザー宅からの売電を停止すると共に、インバータで発電される電力、あるいは蓄電された電力を、予め設定された家庭内の電力供給箇所に供給し、所定の電気機器を駆動することができるという効果を有する。
【図面の簡単な説明】
【図１】本発明の実施例における家庭用発電システムの構成図
【図２】従来の太陽光発電システムの構成図
【符号の説明】
１　太陽電池
３　インバータ
５　電力会社
６　電力配線設備
１４　制御部
１７　蓄電部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a home power generation system such as solar power generation or fuel cell power generation.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as this type of home power generation system, there is one shown in FIG.
[0003]
In FIG. 2, 1 is a solar cell, 2 is a connection box for collectively connecting wirings from the solar cell 1, 3 is an inverter that converts DC output power from the solar cell 1 into AC power and is system-connected, and 4 is A power distribution board, 5 is a power company, 6 is a power distribution system of a system, 7 is a power selling meter for selling power generated by the solar cell 1 to the power company 5, and 8 is an integrated power purchased from the power company 5. A power purchase meter, 9 and 10 are electric devices, 11 and 12 are power distribution facilities in a home for supplying electric power to the electric devices 9 and 10, and 13 is an inverter 3 when the power supply from the grid is stopped, that is, at the time of a power failure. This is a dedicated outlet for independent operation.
[0004]
[Problems to be solved by the invention]
However, in the above-described conventional configuration, when the power supply to the user is stopped, that is, when a power failure occurs, for example, when an abnormality occurs in the power distribution equipment 6 of the system or in the case of construction of the power distribution equipment, the system connection is stopped. The system inverter 3 must detect the power failure and stop selling power to the power distribution system. In addition, when the inverter 3 is operated in this state, the operation is in the independent operation mode, and power is supplied only from the dedicated outlet 13. Had the problem of not being able to do so.
[0005]
The present invention solves the above-mentioned conventional problems. In the event that a power outage occurs in a power distribution facility on the side of a power company, power sales from each user's home are surely stopped, and an inverter is driven to activate a predetermined power supply. It is an object to provide a household power generation system that can supply power to devices.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a household power generation system of the present invention includes a battery such as a solar cell or a fuel cell, an inverter which is connected to a system while converting DC output power from the battery into AC power, and When the commercial power supplied from the grid is stopped, the control unit controls a preset power supply location in the home.
[0007]
As a result, when the power supply from the power company is stopped, control is performed to stop the operation to the output system to sell the power, so that power is not supplied to the distribution equipment at the time of the power failure, and The output of the driving inverter is supplied to a preset power supply point in the home, and can drive a predetermined electric device.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
The invention according to claim 1 provides a battery such as a solar cell or a fuel cell, an inverter that converts DC output power from the battery into AC power and is connected to a system, and commercial power supplied from the system. When the power supply is stopped, the home power generation system is provided with a control unit that controls a preset power supply location in the home. Since the power is supplied, there is no need to reconnect the electrical equipment to the dedicated outlet each time, and the power generation system is very easy to use.
[0009]
The invention according to claim 2 has a power storage unit that stores the output power of the inverter, and includes a control unit that controls a power supply location according to the amount of power stored in the power storage unit. By using the system, even in a state where power is not generated at night in the case of a solar power generation system, predetermined electric devices can be energized and used according to the amount of power stored in the power storage unit.
[0010]
According to a third aspect of the present invention, the control unit has a setting unit for setting and changing a power supply location in the home. When the electrical equipment to be connected is changed, it can be freely changed so that energization to a predetermined equipment is always given priority.
[0011]
According to a fourth aspect of the present invention, the control unit changes a power supply location in a house according to a change in the amount of stored power, thereby providing the household power generation system according to any one of the first to third aspects. When the power consumption decreases, the power storage unit can be effectively operated by supplying power to a predetermined small load power device.
[0012]
According to a fifth aspect of the present invention, the setting unit can set the priority order of the power supply points in the home. By using the household power generation system according to the third aspect, even when the connection place of the electric device is changed, Can respond appropriately.
[0013]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to FIG.
[0014]
The figure shows a household power generation system according to an embodiment of the present invention, and the same components as those shown in FIG.
[0015]
In the figure, reference numeral 14 denotes a control unit, which controls preset power supply points 15 and 16 in the home and reduces the output power of the inverter 3 when the commercial power supplied from the power distribution equipment 6 in the system is stopped. The power supply points 15 and 16 in the home are changed and controlled according to the change in the amount of power stored in the power storage unit 17.
[0016]
The control unit 14 also has a built-in setting unit that can set the priority order of the power supply points 15, 16 and the like. The control unit 14 transmits and receives an information signal or a control signal to and from the inverter 3, the distribution board 4, the power supply points 15 and 16 in the home, and the power storage unit 17 to realize the above control.
[0017]
The operation and operation of the home power generation system configured as described above will be described below.
[0018]
First, when there is an abnormality or the like in the power distribution facility 6, power transmission from the power company 5 is interrupted, that is, a power failure occurs. The inverter 3 detects that the commercial power is not transmitted, and the control unit 14 receives the signal to open the AC switch in the distribution board 4 to prevent reverse power flow to the power distribution equipment 6. Further, the control unit 14 controls a home power distribution facility control unit at a preset power supply point 15 or 16 in the home, and supplies power from the inverter 3 to a predetermined location.
[0019]
The power generated by the inverter 3 is stored in the power storage unit 17. With this amount of stored power, the power supply is controlled in accordance with the power consumption of the electric devices 9 and 10 connected to the power supply points 15 and 16 in the house, that is, to the supply points arranged in order based on the power consumption information. It is. The function of setting the priority order is built in the setting unit of the control unit 14, and the user can freely change the setting based on the electrical device information.
[0020]
As described above, in this embodiment, when the power transmission from the power company 5 is stopped, that is, when the power is cut off, the power generation facilities in the home, that is, from the solar cell 1, the junction box 2, and the inverter 3 to the commercial power distribution facilities 6 And the power generated by the inverter 3 or the stored power is supplied to preset power supply points 15 and 16 in the home to drive predetermined electric devices 9 and 10. It has the effect of being able to.
[0021]
Furthermore, in a state where the inverter 3 cannot be driven, power is supplied to the home power distribution equipment in accordance with the set priority order using the power stored in the power storage unit 17, so that power generation by the solar cell 1 at night or the like is not possible. Power can be supplied to the predetermined electric devices 9 and 10 even in a possible time zone.
[0022]
In this embodiment, the solar cell 1 is used as the battery, but the same effect can be obtained with a cogeneration system such as a fuel cell.
[0023]
Further, in the present embodiment, an example is shown in which the number of power supply points in the home is two. However, even in the case of a plurality of power supply points, the priority order is set in advance, so that any home power supply equipment to which a desired electric device is connected It is possible to operate the control unit, that is, to supply power to a predetermined electric device.
[0024]
Further, in the present embodiment, the example in which the home power distribution equipment control unit is installed in the immediate vicinity of the electric equipment, that is, in the example where the power distribution equipment control unit is installed in the vicinity of the outlet has been described. It is also possible. In this case, the control is not the power supply control for each device but the control for each power distribution system.
[0025]
Here, only the operation at the time of a power outage has been described. It is supplied.
[0026]
【The invention's effect】
As described above, according to the present invention, when there is a power outage in the power distribution equipment on the power company side, power sales from each user's home are reliably stopped, and power generated by the inverter or stored. Electric power is supplied to a preset power supply location in the home, and there is an effect that predetermined electric equipment can be driven.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a home power generation system according to an embodiment of the present invention. FIG. 2 is a configuration diagram of a conventional solar power generation system.
DESCRIPTION OF SYMBOLS 1 Solar cell 3 Inverter 5 Power company 6 Power wiring equipment 14 Control part 17 Power storage part

Claims (5)

太陽電池あるいは燃料電池などの電池と、前記電池からの直流出力電力を交流電力に変換すると共に系統連系されたインバータと、前記系統から供給される商用電力が停止した場合予め設定された家庭内の電力供給箇所を制御する制御部を備えてなる家庭用発電システム。A battery such as a solar cell or a fuel cell, an inverter that converts DC output power from the battery into AC power and is connected to a grid, and a home power set in advance when commercial power supplied from the grid is stopped. Household power generation system comprising a control unit for controlling a power supply point of the home. インバータの出力電力を蓄積する蓄電部を有し、前記蓄電部の蓄電量に応じて電力供給箇所を制御する制御部からなる請求項１に記載の家庭用発電システム。The household power generation system according to claim 1, further comprising a power storage unit that stores the output power of the inverter, and a control unit that controls a power supply location according to the amount of power stored in the power storage unit. 制御部は家庭内の電力供給箇所を設定可変する設定部を備えた請求項１または２に記載の家庭用発電システム。The home power generation system according to claim 1, wherein the control unit includes a setting unit configured to change a power supply location in the home. 制御部は蓄電量の変化に従って家庭内の電力供給箇所を変更する請求項１〜３のいずれか１項に記載の家庭用発電システム。The home power generation system according to any one of claims 1 to 3, wherein the control unit changes a power supply location in the home according to a change in the amount of stored power. 設定部は家庭内の電力供給個所の優先順序を設定できる請求項３に記載の家庭用発電システム。The household power generation system according to claim 3, wherein the setting unit can set a priority order of power supply points in the home.
JP2002170880A 2002-06-12 2002-06-12 Home power generation system Pending JP2004015035A (en)

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