JP3171633U - Solar system that can sell electricity with electricity storage - Google Patents

Solar system that can sell electricity with electricity storage Download PDF

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JP3171633U
JP3171633U JP2011005050U JP2011005050U JP3171633U JP 3171633 U JP3171633 U JP 3171633U JP 2011005050 U JP2011005050 U JP 2011005050U JP 2011005050 U JP2011005050 U JP 2011005050U JP 3171633 U JP3171633 U JP 3171633U
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秀文 加門
秀文 加門
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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
    • 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
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • 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
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

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Abstract

【課題】停電や災害などによって商用電力系統からの電力供給が途絶えたとき、商用電力系統に代わって負荷に対して電力を安定的に供給する。【解決手段】商用電力系統Ｂからの電力供給が途絶える非常時に、負荷７に電力を供給する戸別蓄電付き売電可能太陽光システムであって、蓄電装置Ａが、商用電力系統Ｂ、太陽電池Ｃ１に接続される電力入力端子５から入力される電力を受けて充電が行われる蓄電池１、蓄電池１の電力充電動作と電力放電動作を制御する充放電コントローラ２、商用電力系統Ｂからの電力供給が途絶えたときに、蓄電池１からの電力供給に切り替える回路切替え部４、回路切替え部４に接続される電力出力端子６を備えている。【選択図】図２When power supply from a commercial power system is interrupted due to a power failure or disaster, power is stably supplied to a load instead of the commercial power system. In an emergency in which power supply from a commercial power system B is interrupted, a solar power system capable of selling power with a door-to-door power storage that supplies power to a load 7, wherein the power storage device A is connected to the commercial power system B and the solar battery C1. The storage battery 1 that is charged by receiving the power input from the power input terminal 5 connected to the battery, the charge / discharge controller 2 that controls the power charging operation and the power discharging operation of the storage battery 1, and the power supply from the commercial power system B A circuit switching unit 4 that switches to power supply from the storage battery 1 when the power is lost, and a power output terminal 6 that is connected to the circuit switching unit 4 are provided. [Selection] Figure 2

Description

本考案は、余剰電力の売電が可能で、しかも、停電や災害などによって商用電力系統から負荷への電力供給が途絶えたときに、負荷に電力を安定的に供給するための戸別蓄電付き売電可能太陽光システムに関する。   The present invention is capable of selling surplus power, and when the supply of power from the commercial power system to the load is interrupted due to a power outage or disaster, etc. It relates to an electric solar system.

近年、地球温暖化などに対する地球環境対策の観点から、自然エネルギーから得られる電気エネルギーの利用が見直され、クリーンなエネルギー供給源の代表として太陽光エネルギーや風力エネルギーなどを有効に利用したエネルギーシステムが急速に普及してきている。
特に、電気配線や設置費用、そして発電量などの有効性の面から太陽光エネルギーを利用した太陽光発電システムの普及は著しいものであり、また、太陽光発電システムで発電される電力に余剰が生じた場合は、その余剰電力を電力会社に売電し、売却代金収入を得ることで、総合的に見て電気代の削減に寄与しようとするものも急速に普及している。 In recent years, from the viewpoint of global environmental countermeasures against global warming, the use of electric energy obtained from natural energy has been reviewed, and energy systems that effectively use solar energy, wind energy, etc. as representative of clean energy sources It is spreading rapidly.
In particular, the widespread use of solar power generation systems that use solar energy from the standpoint of the effectiveness of electrical wiring, installation costs, and power generation, and there is a surplus in the power generated by the solar power generation system. If it occurs, the surplus power is sold to an electric power company and the proceeds from the sale are earned, so that those who try to contribute to the reduction of the electricity bill are rapidly spreading.

しかしながら、自然エネルギーにより得られる電気エネルギーの発電量は不安定である。つまり、自然エネルギーを利用した発電システムでは自然環境によっては十分な発電量を得られないような状況も起こり得る。例えば、風力エネルギーを利用した風力発電システムでは、風力の弱いときには所望の発電量が得られないこともあり、電力供給すべき負荷に対して十分な電力の供給ができないという問題がある。このような問題は、特に、太陽光エネルギーを利用した太陽光発電システムでは顕著であり、太陽の出ている晴天の日の日中には、負荷において消費する電力以上の十分な発電が期待できるものの、曇りや夜間においてはほとんど発電が期待できない。   However, the amount of electric energy generated by natural energy is unstable. That is, in a power generation system using natural energy, there may be a situation where a sufficient amount of power generation cannot be obtained depending on the natural environment. For example, in a wind power generation system using wind energy, there is a problem that a desired power generation amount cannot be obtained when wind power is weak, and sufficient power cannot be supplied to a load to be supplied with power. Such a problem is particularly noticeable in a solar power generation system using solar energy, and during a sunny day when the sun is out, sufficient power generation beyond the power consumed by the load can be expected. However, almost no power generation can be expected when it is cloudy or at night.

このような問題に対応するために、商用電力系統に連系させた太陽光発電システム、そして、太陽光発電システムで発電される電力により充電される蓄電池を備えて、電力の安定化を図るように開発された技術が知られている（例えば、特許文献１などを参照。）。   In order to address such problems, a photovoltaic power generation system linked to a commercial power system and a storage battery charged by the power generated by the photovoltaic power generation system are provided to stabilize the power. (See, for example, Patent Document 1).

特開２００３−７９０５４号公報JP 2003-79054 A

しかしながら、従来技術では、電力需要ピーク時における蓄電池の充電不足を回避することを目的に開発されたシステムであるため、停電などによって商用電力系統からの電力供給が途絶えたときの非常時用の電源として運用することができないおそれが残されている。
すなわち、商用電力系統の停電は突然起き得るものであり、蓄電池から放電された状態で停電が発生した場合、蓄電池には充分な電力が充電されていないという問題が起こる。そのために、停電時などにおいて最低限電力供給を必要とする負荷、例えば、冷蔵庫、テレビなどの家電に電力を供給することができなくなるおそれがある。
また、一定量の電力が充電されていたとしても、それがすべて使われてしまえば他に蓄電池へ充電する手段はなく、特に、災害などによって商用電力系統からの電力供給が長期的に望めないときには電力供給が完全に途絶えるおそれがある。 However, since the conventional technology is a system developed for the purpose of avoiding insufficient charging of the storage battery at the peak of power demand, it is an emergency power source when the power supply from the commercial power system is interrupted due to a power failure or the like There is a possibility that it cannot be operated as
That is, a power failure in the commercial power system can occur suddenly, and when a power failure occurs while being discharged from the storage battery, there is a problem that sufficient power is not charged in the storage battery. Therefore, there is a possibility that power cannot be supplied to a load that requires a minimum power supply, such as a refrigerator or a television set, at the time of a power failure.
In addition, even if a certain amount of power is charged, there is no other way to charge the storage battery once it is used, especially in the long-term from the commercial power system due to disasters etc. Sometimes power supply can be completely disrupted.

そこで、本考案は、このような問題を解消することを課題に創案されたものである。すなわち、商用電力系統からの電力供給が途絶えたときに、商用電力系統に代わって負荷に対して電力を安定的に供給することができること、などが本考案の目的である。   Therefore, the present invention has been created with the object of solving such problems. That is, an object of the present invention is to stably supply power to a load in place of the commercial power system when power supply from the commercial power system is interrupted.

前記課題を解決するために、本考案に係る戸別蓄電付き売電可能太陽光システムでは少なくとも以下の構成を具備している。
すなわち、商用電力系統から負荷への電力供給が途絶えたときに、前記負荷に電力を供給する構成の戸別蓄電付き売電可能太陽光システムであって、
蓄電装置を備え、該蓄電装置は、前記商用電力系統、太陽電池に接続される電力入力端子と、該電力入力端子から入力される電力を受けて少なくとも充電が行われる蓄電池と、該蓄電池の電力充電動作と電力放電動作を制御する充放電コントローラと、前記商用電力系統からの電力供給が途絶えたときに、前記蓄電池からの電力供給に切り替える回路切替え部と、前記回路切替え部に接続される電力出力端子とを備えて構成されていることを特徴とする。 In order to solve the above-mentioned problem, the solar system capable of selling power with a door-to-door storage according to the present invention has at least the following configuration.
That is, when the power supply from the commercial power system to the load is interrupted, it is a solar system capable of selling power with a door-to-door storage configured to supply power to the load,
The power storage device includes a power input terminal connected to the commercial power system and the solar battery, a storage battery that is at least charged by receiving power input from the power input terminal, and power of the storage battery A charge / discharge controller that controls a charge operation and a power discharge operation; a circuit switching unit that switches to power supply from the storage battery when power supply from the commercial power system stops; and power that is connected to the circuit switching unit And an output terminal.

このような構成によれば、商用電力系統と太陽電池とから得られる電力を充電する蓄電池の充填状態を制御（管理）する充放電コントローラの電力充電動作によって蓄電池を常に満充電状態で待機させることができる。また、蓄電池が満充電状態で、太陽電池で発電される電力が負荷の消費電力量を超える場合には、余った電力を分電盤から商用電力系統に逆潮流し、余剰電力を電力会社に売電することができる。
そして、停電などにより商用電力系統から負荷への電力供給が途絶えたときには、充放電コントローラの電力放電動作（回路切替え部への回路切替え信号）によって蓄電池からの放電に自動的に切り替わり、負荷に対して電力を安定的に供給することができる。 According to such a configuration, the storage battery is always kept in a fully charged state by the power charging operation of the charge / discharge controller that controls (manages) the charging state of the storage battery that charges the power obtained from the commercial power system and the solar battery. Can do. In addition, when the storage battery is fully charged and the power generated by the solar battery exceeds the power consumption of the load, the surplus power is reversed from the distribution board to the commercial power system, and the surplus power is transferred to the power company. You can sell electricity.
When power supply from the commercial power system to the load is interrupted due to a power failure or the like, the power discharge operation of the charge / discharge controller (circuit switching signal to the circuit switching unit) automatically switches to discharging from the storage battery, Power can be supplied stably.

また、災害などによって商用電力系統からの電力供給が長期的に望めないことが起きた場合、電力入力端子をパワコン（パワーコンディショナー）に直接接続してパワコンを自立運転モードで運転させることで、太陽電池で発電される電力の余剰分を蓄電池に充電しながら負荷に対して電力を安定的に供給することが可能になる。   In addition, in the event that a power supply from the commercial power system cannot be expected for a long time due to a disaster, etc. It is possible to stably supply power to the load while charging the storage battery with surplus power generated by the battery.

本考案の戸別蓄電付き売電可能太陽光システムによれば、余剰電力の電力会社への売電が可能で、停電や災害などによって商用電力系統から負荷への電力供給が途絶えたときには商用電力系統に代わって家庭内負荷に対して電力を安定的に供給することができる。しかも、災害によって商用電力系統からの電力供給が長期的に望めないときには太陽電池、蓄電装置から得られる電力を安定的に供給する非常時用として運用させることができる。   According to the solar system capable of selling electricity with door-to-door storage of the present invention, it is possible to sell surplus power to a power company, and when the power supply from the commercial power system to the load is interrupted due to a power failure or disaster, the commercial power system Instead of this, power can be stably supplied to the household load. Moreover, when power supply from the commercial power system cannot be expected for a long time due to a disaster, it can be operated as an emergency for stably supplying power obtained from the solar battery and the power storage device.

本考案の実施形態に係る戸別蓄電付き売電可能太陽光システムの蓄電装置を示す説明図である。It is explanatory drawing which shows the electrical storage apparatus of the electric power sale possible solar system with a household electrical storage which concerns on embodiment of this invention. 本考案の実施形態に係る戸別蓄電付き売電可能太陽光システムの構成を示す説明図である。It is explanatory drawing which shows the structure of the solar system with electric power sale with a door-to-door electrical storage which concerns on embodiment of this invention. 商用電力系統の平常時における蓄電池への電力充電動作を、電力の流れで示す説明図である。It is explanatory drawing which shows the electric power charge operation | movement to the storage battery in the normal time of a commercial power system by the flow of electric power. 停電により商用電力系統からの電力供給が一時的に途絶えたときの蓄電池からの電力放電動作を、電力の流れで示す説明図である。It is explanatory drawing which shows the electric power discharge operation | movement from a storage battery when the electric power supply from a commercial power system interrupted temporarily by the power failure by the flow of electric power. 災害により商用電力系統からの電力供給が長期的に望めないときの電力の流れを示す説明図である。It is explanatory drawing which shows the flow of electric power when the electric power supply from a commercial power system cannot be expected in the long term by a disaster.

以下、本考案の実施形態について、適宜図面を参照しながら詳細に説明する。
図１は、本考案の実施形態に係る戸別蓄電付き売電可能太陽光システムの蓄電装置を示す説明図であり、図２は、同戸別蓄電付き売電可能太陽光システムの構成を示す説明図である。
戸別蓄電付き売電可能太陽光システムは、商用電力系統Ｂに連系する太陽光発電装置Ｃに蓄電装置Ａを備え、マンションなどの集合住宅や一戸建て住宅などに設置されて、平常時（通常時）において商用電力系統Ｂと太陽電池Ｃ１とから得られる電力、特に、太陽電池Ｃ１で発電される電力を充電し、停電により商用電力系統Ｂからの電力供給が一時的に途絶えたときや災害により商用電力系統Ｂからの電力供給が長期的に望めないときに、商用電力系統Ｂに代わり専用負荷７に電力を供給する非常時用の電源として運用されるものである。
つまり、本実施形態に係る戸別蓄電付き売電可能太陽光システムの蓄電装置Ａは、商用電力系統Ｂの平常時とは切り離して、停電や災害などによって商用電力系統Ｂからの電力供給が途絶えたときの非常時用の電源として運用されるものである。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
FIG. 1 is an explanatory diagram illustrating a power storage device of a solar power system capable of selling power with a door-to-door storage according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram illustrating a configuration of a solar power system capable of selling power with a door-to-door storage. It is.
A solar system capable of selling power with a door-to-door power storage is equipped with a power storage device A in a solar power generation device C connected to a commercial power system B, and is installed in an apartment house such as a condominium, a detached house, etc. ), The power obtained from the commercial power system B and the solar cell C1, in particular, the power generated by the solar cell C1 is charged, and the power supply from the commercial power system B is temporarily interrupted due to a power failure or due to a disaster. When power supply from the commercial power system B cannot be expected in the long term, it is operated as an emergency power source that supplies power to the dedicated load 7 instead of the commercial power system B.
That is, the power storage device A of the solar system capable of selling power with a door-to-door storage according to the present embodiment is disconnected from the normal power supply of the commercial power system B, and power supply from the commercial power system B is interrupted due to a power failure or disaster. It is operated as an emergency power source.

≪蓄電装置の構成≫
蓄電装置Ａは、図１に示すように、蓄電池１、充放電コントローラ２、ＤＣ／ＡＣインバータ３、回路切替え部４、電力入力端子５、電力出力端子６を備えて構成されている。
また、蓄電装置Ａは、電力出力端子６に接続される専用負荷７を備えており、この専用負荷７から停電や災害時などにおいて最低限電力供給を必要とする例えば、冷蔵庫、テレビ、一部の照明などに対して電力を供給するように構成されている。 ≪Configuration of power storage device≫
As shown in FIG. 1, the power storage device A includes a storage battery 1, a charge / discharge controller 2, a DC / AC inverter 3, a circuit switching unit 4, a power input terminal 5, and a power output terminal 6.
In addition, the power storage device A includes a dedicated load 7 connected to the power output terminal 6, and requires a minimum power supply from the dedicated load 7 in the event of a power failure or disaster, for example, a refrigerator, a television, It is comprised so that electric power may be supplied with respect to the illumination of this.

≪蓄電池の構成≫
蓄電池１は、充放電コントローラ２からの要求に応じて充電および放電する。また、停電や災害などにおいて最低限電力供給を必要とする例えば、冷蔵庫、テレビ、一部の照明などの電力を所定期間賄うことができる充電量（バックアップレベル）に設定されている。
この蓄電池１は、例えば、ニッケル・水素蓄電、ニッケル・カドミウム蓄電池またはリチウムイオン電池、鉛電池などのいずれからなり、これらの電池はそれぞれの特色を持っている。本実施形態では鉛電池を使用している。 ≪Storage battery configuration≫
The storage battery 1 is charged and discharged in response to a request from the charge / discharge controller 2. In addition, it is set to a charge amount (backup level) that can cover power for a predetermined period, such as a refrigerator, a television, and some lightings that require a minimum power supply in the event of a power failure or disaster.
The storage battery 1 includes, for example, a nickel / hydrogen storage battery, a nickel / cadmium storage battery, a lithium ion battery, a lead battery, or the like, and these batteries have their respective characteristics. In this embodiment, a lead battery is used.

≪充放電コントローラの構成≫
充放電コントローラ２は、商用電力系統Ｂから供給される電力、太陽光発電装置Ｃの太陽電池Ｃ１で発電される電力を受けて充電が行われる蓄電池１の電力充電動作を制御する機能を備えている。
これにより、専用負荷７への電力供給による放電や自然放電などによって蓄電池１の充電が満充電状態よりも減った（下がった）ときに、電力充電を開始させて蓄電池１が常に満充電状態で待機するように管理（監視）し、停電時や災害時に備えて確実に蓄電池１を満充電状態で待機させるように蓄電池（図示省略の充電器）１を充電動作させる。 ≪Charge / discharge controller configuration≫
The charge / discharge controller 2 has a function of controlling the power charging operation of the storage battery 1 that is charged by receiving the power supplied from the commercial power system B and the power generated by the solar battery C1 of the solar power generation device C. Yes.
As a result, when the charge of the storage battery 1 is reduced (lowered) from the fully charged state due to discharge due to power supply to the dedicated load 7 or spontaneous discharge, the power storage is started and the storage battery 1 is always in the fully charged state. The battery is managed (monitored) so as to wait, and the storage battery (not shown) 1 is charged so that the storage battery 1 is fully charged in preparation for a power failure or disaster.

また、充放電コントローラ２は、停電や災害などによって商用電力系統Ｂからの電力供給が途絶えて分電盤Ｂ１の電源が完全に落ちたときにそれを商用電力系統Ｂの停電として検出する停電検出機能と、商用電力系統Ｂの停電検出とほぼ同時に回路切替え部４に回路切替え信号を発信して蓄電池１からの電力供給に切り替える蓄電池１の電力放電動作を制御する機能を備えている。
これにより、回路切替え部４の後記するリレー接点４ａのリレー接点４ｂに対する平常時の接続状態から非常時のリレー接点４ｃ側との接続に自動的に切り替わり、ＤＣ／ＡＣインバータ３を通して蓄電池１から専用負荷７への電力供給が、商用電力系統Ｂからの電力供給が途絶えたときに自動的に開始する。 In addition, the charge / discharge controller 2 detects a power failure detection for detecting a power failure of the commercial power system B when the power supply from the commercial power system B is interrupted due to a power failure or a disaster and the power distribution panel B1 is completely turned off. The function and the function of controlling the power discharge operation of the storage battery 1 to switch to power supply from the storage battery 1 by transmitting a circuit switching signal to the circuit switching unit 4 almost simultaneously with the detection of the power failure of the commercial power system B are provided.
As a result, the normal switching state of the relay contact 4a to the relay contact 4b, which will be described later, of the circuit switching unit 4 is automatically switched to the connection to the relay contact 4c in the emergency, and the storage battery 1 is dedicated through the DC / AC inverter 3. The power supply to the load 7 is automatically started when the power supply from the commercial power system B stops.

≪ＤＣ／ＡＣインバータの構成≫
ＤＣ／ＡＣインバータ３は、太陽光発電装置Ｃの太陽電池Ｃ１で発電されるまたは蓄電池１から放電される直流電力を家庭内使用の交流電力（ＡＣ１００Ｖ）に変換する電力変換装置である。すなわち、ＤＣ／ＡＣインバータ３は、停電や災害などによって商用電力系統Ｂからの電力供給が途絶えて、充放電コントローラ２の電力放電動作により蓄電池１からの電力放電に切り替わったときに、蓄電池１から放電される直流電力を交流電力に変換し、回路切替え部４を通して電力出力端子６に供給するようになっている。 ≪Configuration of DC / AC inverter≫
The DC / AC inverter 3 is a power conversion device that converts DC power generated by the solar cell C1 of the solar power generation device C or discharged from the storage battery 1 into AC power (AC100V) for home use. That is, when the power supply from the commercial power system B is interrupted due to a power failure or disaster, and the DC / AC inverter 3 is switched to the power discharge from the storage battery 1 by the power discharge operation of the charge / discharge controller 2, the DC / AC inverter 3 The discharged DC power is converted to AC power and supplied to the power output terminal 6 through the circuit switching unit 4.

≪回路切替え部の構成≫
回路切替え部４は、商用電力系統Ｂから専用負荷７、通常負荷８への電力供給が平常に行われている平常時にはリレー接点４ａとリレー接点４ｂとを接続、そして、停電や災害などによって商用電力系統Ｂから専用負荷７、通常負荷８への電力供給が途絶える非常時にはリレー接点４ａとリレー接点４ｃとを接続する切り替えを行う。
具体的に説明すると、商用電力系統Ｂからの電力供給が平常時にはリレー接点４ａとリレー接点４ｂとの接続状態が保持され、停電や災害などによって商用電力系統Ｂからの電力供給が途絶えて蓄電コントローラ２によって商用電力系統Ｂの停電が検知されて回路切替え部４に切替え指令信号が発信されたときにはリレー接点４ａとリレー接点４ｃとの接続に自動的に切り替わるように構成されている。
これにより、停電や災害などによって商用電力系統Ｂからの電力供給が途絶えたとき、蓄電池１から専用負荷７への電力供給に自動的に切り替わるものである。 ≪Configuration of circuit switching part≫
The circuit switching unit 4 connects the relay contact 4a and the relay contact 4b during normal times when the power supply from the commercial power system B to the dedicated load 7 and the normal load 8 is normally performed. In an emergency in which the power supply from the power system B to the dedicated load 7 and the normal load 8 is interrupted, the relay contact 4a and the relay contact 4c are switched.
More specifically, when the power supply from the commercial power system B is normal, the connection state between the relay contact 4a and the relay contact 4b is maintained, and the power supply from the commercial power system B is interrupted due to a power failure or a disaster. 2, when a power failure of the commercial power system B is detected and a switching command signal is transmitted to the circuit switching unit 4, the connection to the relay contact 4 a and the relay contact 4 c is automatically switched.
Thereby, when the power supply from the commercial power system B is interrupted due to a power failure or a disaster, the power supply is automatically switched from the storage battery 1 to the dedicated load 7.

≪電力入力端子の構成≫
電力入力端子５は、充放電コントローラ２、回路切替え部４に接続されて、商用電力系統Ｂが平常時において商用電力系統Ｂ、太陽光発電装置Ｃから得られる電力を充放電コントローラ２、専用負荷７に入力する。また、電力入力端子５は、商用電力系統Ｂの平常時や商用電力系統Ｂから電力供給が一時的に途絶える停電時には分電盤Ｂ１に接続され、そして、商用電力系統Ｂからの電力供給が長期的に望めないなどの災害時には分電盤Ｂ１を介さずに太陽光発電装置ＣのパワコンＣ２に直接接続されるものである。
なお、図示を省略しているが、電力入力端子５として、例えば、電源プラグまたは電源コンセントのいずれか一方を使用し、分電盤Ｂ１、パワコンＣ２にわたり配線される延長ケーブル側に備えられている電源コンセントまたは電源プラグを差込み方式にて接続するようにするとよい。 ≪Power input terminal configuration≫
The power input terminal 5 is connected to the charge / discharge controller 2 and the circuit switching unit 4, and the commercial power system B supplies the power obtained from the commercial power system B and the solar power generation device C in normal times to the charge / discharge controller 2 and the dedicated load. 7 In addition, the power input terminal 5 is connected to the distribution board B1 at the time of a power failure in which the power supply from the commercial power system B is normal or from the commercial power system B, and the power supply from the commercial power system B is long-term. In the event of a disaster that cannot be expected, it is directly connected to the power conditioner C2 of the solar power generation device C without going through the distribution board B1.
In addition, although illustration is abbreviate | omitted, as the power input terminal 5, for example, either a power plug or a power outlet is used, and the power input terminal 5 is provided on the extension cable side wired over the distribution board B1 and the power conditioner C2. It is better to connect the power outlet or power plug by plugging in.

≪電力出力端子の構成≫
電力出力端子６は、回路切替え部４のリレー接点４ａに接続されて、商用電力系統Ｂ、太陽電池Ｃ１、蓄電池１から得られる電力を専用負荷７に出力するものである。
なお、図示を省略しているが、電力出力端子６として、例えば、電源プラグまたは電源コンセントのいずれか一方を使用し、専用負荷７側に備えられている電源コンセントまたは電源プラグに差込み方式にて接続するようにするとよい。 ≪Configuration of power output terminal≫
The power output terminal 6 is connected to the relay contact 4 a of the circuit switching unit 4, and outputs power obtained from the commercial power system B, the solar battery C 1, and the storage battery 1 to the dedicated load 7.
Although not shown in the figure, as the power output terminal 6, for example, either a power plug or a power outlet is used, and inserted into a power outlet or a power plug provided on the dedicated load 7 side. It is better to connect.

［作用説明］
つぎに、以上のように構成されている本実施形態に係る戸別蓄電付き売電可能太陽光システムの動作の一例について簡単に説明する。
まず初めに、商用電力系統Ｂからの電力供給が平常に行われている平常時について説明する。
図３は、商用電力系統の平常時（通常時）における蓄電池への電力充電動作（デフォルト動作）を、電力の流れで示す説明図である。矢印ａは、商用電力系統Ｂ、太陽光発電装置Ｃからの電力の流れを示す。 [Description of operation]
Next, an example of the operation of the solar system capable of selling power with a door-to-door storage according to this embodiment configured as described above will be briefly described.
First, the normal time when the power supply from the commercial power system B is normally performed will be described.
FIG. 3 is an explanatory diagram showing the power charging operation (default operation) to the storage battery in the normal time (normal time) of the commercial power system with the flow of power. An arrow a indicates the flow of power from the commercial power system B and the solar power generation device C.

図３は、商用電力系統Ｂから専用負荷７、通常負荷８への電力供給が平常に行われている平常時の状態であり、この状態において商用電力系統Ｂ、太陽光発電装置Ｃからの電力は、通常負荷８、電力入力端子５から蓄電装置Ａの専用負荷７へと供給されるとともに、充放電コントローラ２を通して蓄電池１に流れる。
このとき、蓄電池１の充電状態が満充電状態であるときには、充放電コントローラ２の電力充電動作は機能せず、電力は蓄電池１に流れない。一方、自然放電などによって蓄電池１の充電が満充電状態よりも減って（下がって）いるときには、充放電コントローラ２が電力充電動作を開始して蓄電池１への電力充電を行う。このようにして、蓄電池１の充電は充放電コントローラ２によって常に満充電状態に管理（監視）維持される。つまり、停電や災害などにより商用電力系統Ｂからの電力供給が途絶えたときの非常時に備える。
そして、蓄電池１が満充電状態で、太陽電池Ｃ１で発電される電力が、専用負荷７、通常負荷８の消費電力量を超える場合には、余った電力を分電盤Ｂ１から商用電力系統Ｂに逆潮流し、余剰電力を電力会社に売電する。 FIG. 3 shows a normal state in which power supply from the commercial power system B to the dedicated load 7 and the normal load 8 is normally performed. In this state, the power from the commercial power system B and the solar power generation device C is shown. Is supplied from the normal load 8 and the power input terminal 5 to the dedicated load 7 of the power storage device A and flows to the storage battery 1 through the charge / discharge controller 2.
At this time, when the state of charge of the storage battery 1 is a fully charged state, the power charging operation of the charge / discharge controller 2 does not function and power does not flow to the storage battery 1. On the other hand, when the charging of the storage battery 1 is reduced (lowered) from the fully charged state due to natural discharge or the like, the charge / discharge controller 2 starts the power charging operation and charges the storage battery 1 with power. In this way, the charging of the storage battery 1 is always managed (monitored) by the charge / discharge controller 2 in a fully charged state. That is, it prepares for an emergency when the power supply from the commercial power system B is interrupted due to a power failure or a disaster.
When the storage battery 1 is fully charged and the power generated by the solar cell C1 exceeds the power consumption of the dedicated load 7 and the normal load 8, the surplus power is transferred from the distribution board B1 to the commercial power system B. The surplus power is sold to the power company.

つぎに、商用電力系統Ｂからの電力供給が一時的に途絶える停電時について説明する。
図４は、停電により商用電力系統からの電力供給が一時的に途絶えたときの電力放電動作を、電力の流れで示す説明図である。矢印ｂは、蓄電池１から放電される電力の流れを示す。ここでは、図３を適宜参照しながら説明する。 Next, a description will be given of a power failure when the power supply from the commercial power system B is temporarily interrupted.
FIG. 4 is an explanatory diagram showing the power discharge operation in the flow of power when the power supply from the commercial power system is temporarily interrupted due to a power failure. An arrow b indicates the flow of power discharged from the storage battery 1. Here, description will be made with reference to FIG. 3 as appropriate.

停電などによって商用電力系統Ｂからの電力供給が途絶えて分電盤Ｂ１の電源が完全に落ちると、充放電コントローラ２は商用電力系統Ｂの停電として検出するとともに、停電検出とほぼ同時に回路切替え部４に回路切替え信号を発信する。
すると、回路切替え部４の回路接続が、図３に示すリレー接点４ａとリレー接点４ｂとの接続状態から図４に示すリレー接点４ａとリレー接点４ｃとの接続に自動的に切り替わる。
これにより、蓄電池１からの放電が開始して専用負荷７に供給される。つまり、停電時において最低限電力供給を必要とする例えば、冷蔵庫、テレビ、一部の照明などに対して蓄電池１から電力を安定的に供給することができる。 When the power supply from the commercial power system B is interrupted due to a power failure or the like, and the power of the distribution board B1 is completely dropped, the charge / discharge controller 2 detects the power failure of the commercial power system B and the circuit switching unit almost simultaneously with the power failure detection. 4 sends a circuit switching signal.
Then, the circuit connection of the circuit switching unit 4 is automatically switched from the connection state between the relay contact 4a and the relay contact 4b shown in FIG. 3 to the connection between the relay contact 4a and the relay contact 4c shown in FIG.
Thereby, the discharge from the storage battery 1 starts and is supplied to the dedicated load 7. That is, it is possible to stably supply power from the storage battery 1 to, for example, a refrigerator, a television, a part of lighting, or the like that requires a minimum power supply during a power failure.

そして、商用電力系統Ｂからの電力供給が復帰した時には分電盤Ｂ１の電源が立ち上がることで、これを充放電コントローラ２が検出するとともに、復帰検出とほぼ同時に回路切替え部４に回路切替え信号を発信する。
すると、回路切替え部４の回路接続が、図４に示すリレー接点４ａとリレー接点４ｃとの接続状態から図３に示すリレー接点４ａとリレー接点４ｂとの接続に自動的に切り替わる。これにより、商用電力系統Ｂから専用負荷７、通常負荷８への電力供給が平常に行われる図３に示す平常時の電力供給系統に戻される。 Then, when the power supply from the commercial power system B is restored, the power supply of the distribution board B1 is started up, so that the charge / discharge controller 2 detects this, and at the same time as the restoration detection, a circuit switching signal is sent to the circuit switching unit 4. send.
Then, the circuit connection of the circuit switching unit 4 is automatically switched from the connection state between the relay contact 4a and the relay contact 4c shown in FIG. 4 to the connection between the relay contact 4a and the relay contact 4b shown in FIG. As a result, the power is returned from the commercial power system B to the dedicated load 7 and the normal load 8 to the normal power supply system shown in FIG.

つぎに、商用電力系統Ｂからの電力供給が長期的に望めないおそれがある災害時について説明する。
図５は、災害により商用電力系統から電力供給が長期的に望めないときの電力の流れを示す説明図である。矢印ｃは、太陽光発電装置Ｃ（パワコンＣ２）からの電力の流れを示す。ここでは、図３を適宜参照しながら説明する。 Next, a description will be given of a disaster when there is a possibility that power supply from the commercial power system B cannot be expected in the long term.
FIG. 5 is an explanatory diagram showing the flow of power when power supply from the commercial power system cannot be expected in the long term due to a disaster. An arrow c indicates the flow of electric power from the solar power generation device C (power conditioner C2). Here, description will be made with reference to FIG. 3 as appropriate.

地震、その他の自然災害などにより商用電力系統Ｂからの電力供給が途絶えて分電盤Ｂ１の電源が完全に落ちると、前記停電時と同じく、回路切替え部４の回路接続が、図３に示すリレー接点４ａとリレー接点４ｂとの接続状態から図５に示すリレー接点４ａとリレー接点４ｃとの接続に自動的に切り替わる。
そして、商用電力系統Ｂからの電力供給が長期的に望めない非常事態になったときには、蓄電装置Ａの電力入力端子５の接続を、図３に示す分電盤Ｂ１への接続から図５に示す太陽光発電装置ＣのパワコンＣ２に備えられている図示省略の自立運転コンセントなどに繋ぎ替える。つぎに、パワコンＣ２に備えられている図示省略の運転モード切替えスイッチを平常運転モード側から自立運転モード側に切り替えて、パワコンＣ２を自立運転モードで運転させる。
すると、太陽電池Ｃ１で発電されてパワコンＣ２によって直流から交流に変換された電力は、電力入力端子５から充放電コントローラ２を通して蓄電池１に直接供給されて蓄電池１に一旦充電された後に、蓄電池１から放電されて専用負荷７に供給される。つまり、商用電力系統Ｂからの電力供給が長期的に望めない災害時において、最低限電力供給を必要とする例えば、冷蔵庫、テレビ、一部の照明などに対して太陽電池Ｃ１、蓄電池１から安定的に電力を供給することができる。 When the power supply from the commercial power system B is cut off due to an earthquake or other natural disaster and the power of the distribution board B1 is completely dropped, the circuit connection of the circuit switching unit 4 is shown in FIG. The connection state between the relay contact 4a and the relay contact 4b is automatically switched to the connection between the relay contact 4a and the relay contact 4c shown in FIG.
Then, when an emergency situation in which power supply from the commercial power system B cannot be expected in the long term, the connection of the power input terminal 5 of the power storage device A is changed from the connection to the distribution board B1 shown in FIG. 3 to FIG. It connects with the power supply C2 of the solar power generation device C to be shown, and is connected to an unillustrated self-operating outlet. Next, an operation mode changeover switch (not shown) provided in the power conditioner C2 is switched from the normal operation mode side to the self-sustaining operation mode side, and the power conditioner C2 is operated in the self-sustaining operation mode.
Then, the power generated by the solar battery C1 and converted from direct current to alternating current by the power conditioner C2 is directly supplied from the power input terminal 5 to the storage battery 1 through the charge / discharge controller 2 and once charged to the storage battery 1, and then the storage battery 1 And is supplied to the dedicated load 7. In other words, in the event of a disaster in which power supply from the commercial power system B cannot be expected in the long term, the power supply is stable from the solar battery C1 and the storage battery 1 with respect to, for example, a refrigerator, a TV, and some lighting. Power can be supplied.

Ａ 蓄電装置
１ 蓄電池
２ 充放電コントローラ
３ ＤＣ／ＡＣインバータ
４ 回路切替え部
５ 電力入力端子
６ 電力出力端子
７，８ 負荷
Ｂ 商用電力系統
Ｂ１ 分電盤
Ｃ 太陽光発電装置
Ｃ１ 太陽電池
Ｃ２ パワコン A power storage device 1 storage battery 2 charge / discharge controller 3 DC / AC inverter 4 circuit switching unit 5 power input terminal 6 power output terminal 7,8 load B commercial power system B1 distribution board C solar power generation device C1 solar cell C2 power controller

Claims (1)

商用電力系統から負荷への電力供給が途絶えたときに、前記負荷に電力を供給する構成の戸別蓄電付き売電可能太陽光システムであって、
蓄電装置を備え、
該蓄電装置は、前記商用電力系統、太陽電池に接続される電力入力端子と、
該電力入力端子から入力される電力を受けて充電が行われる蓄電池と、
該蓄電池の電力充電動作と電力放電動作を制御する充放電コントローラと、
前記商用電力系統からの電力供給が途絶えたときに、前記蓄電池からの電力供給に切り替える回路切替え部と、
該回路切替え部に接続される電力出力端子と、を備えていることを特徴とする戸別蓄電付き売電可能太陽光システム。 When the power supply from the commercial power system to the load is interrupted, it is a solar system capable of selling power with a door-to-door storage configured to supply power to the load,
A power storage device,
The power storage device includes a power input terminal connected to the commercial power system and a solar battery,
A storage battery that is charged by receiving power input from the power input terminal;
A charge / discharge controller for controlling the power charging operation and the power discharging operation of the storage battery;
A circuit switching unit that switches to power supply from the storage battery when power supply from the commercial power system is interrupted;
And a power output terminal connected to the circuit switching unit.
JP2011005050U 2011-08-29 2011-08-29 Solar system that can sell electricity with electricity storage Expired - Fee Related JP3171633U (en)

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JP2013140712A (en) * 2012-01-04 2013-07-18 Fujikura Ltd Joint method of superconducting wire rod and external terminal, and external terminal junction structure of superconducting wire rod
JP2014171311A (en) * 2013-03-04 2014-09-18 Denso Corp Power supply system, and power supply control device
JP2014204484A (en) * 2013-04-01 2014-10-27 パナソニック株式会社 Power line protection device, power line switch, and power supply system
CN113471823A (en) * 2020-03-30 2021-10-01 松下知识产权经营株式会社 Power distribution system and distributor system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013140712A (en) * 2012-01-04 2013-07-18 Fujikura Ltd Joint method of superconducting wire rod and external terminal, and external terminal junction structure of superconducting wire rod
JP2014171311A (en) * 2013-03-04 2014-09-18 Denso Corp Power supply system, and power supply control device
JP2014204484A (en) * 2013-04-01 2014-10-27 パナソニック株式会社 Power line protection device, power line switch, and power supply system
US10181753B2 (en) 2013-04-01 2019-01-15 Panasonic Intellectual Property Management Co., Ltd. Electric power system protection device, electric path switching device, and electric power supply system
CN113471823A (en) * 2020-03-30 2021-10-01 松下知识产权经营株式会社 Power distribution system and distributor system

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