JP4868883B2 - Emergency power supply system using fuel cell and distribution board - Google Patents

Emergency power supply system using fuel cell and distribution board Download PDF

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JP4868883B2
JP4868883B2 JP2006047004A JP2006047004A JP4868883B2 JP 4868883 B2 JP4868883 B2 JP 4868883B2 JP 2006047004 A JP2006047004 A JP 2006047004A JP 2006047004 A JP2006047004 A JP 2006047004A JP 4868883 B2 JP4868883 B2 JP 4868883B2
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power
fuel cell
power supply
load
cell system
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JP2007228727A (en
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拓雄 西山
丈 井深
幸弘 川路
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Eneos Corp
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JXTG Nippon Oil and Energy Corp
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Priority to CNA2007800136724A priority patent/CN101421898A/en
Priority to PCT/JP2007/053065 priority patent/WO2007097316A1/en
Priority to KR1020087023203A priority patent/KR101294522B1/en
Priority to TW096106438A priority patent/TWI406466B/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
    • H01M8/04225—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells during start-up
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M16/00—Structural combinations of different types of electrochemical generators
    • H01M16/003—Structural combinations of different types of electrochemical generators of fuel cells with other electrochemical devices, e.g. capacitors, electrolysers
    • H01M16/006—Structural combinations of different types of electrochemical generators of fuel cells with other electrochemical devices, e.g. capacitors, electrolysers of fuel cells with rechargeable batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
    • H01M8/04228—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells during shut-down
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/043—Processes for controlling fuel cells or fuel cell systems applied during specific periods
    • H01M8/04302—Processes for controlling fuel cells or fuel cell systems applied during specific periods applied during start-up
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/043—Processes for controlling fuel cells or fuel cell systems applied during specific periods
    • H01M8/04303—Processes for controlling fuel cells or fuel cell systems applied during specific periods applied during shut-down
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/30—The power source being a fuel cell
    • 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
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/10—Applications of fuel cells in buildings
    • 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
    • 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
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Description

本発明は、燃料電池を用いた非常電源システムに関し、特に、通常時には系統電源に連系して使用され、系統電源の停電時には系統電源から解列して燃料電池からの電力を負荷に供給することが可能な非常電源システムと、そのような非常電源システムで用いられる分電盤とに関する。   The present invention relates to an emergency power supply system using a fuel cell. In particular, the present invention is used in conjunction with a system power supply in a normal state. The invention relates to an emergency power supply system that can be used and a distribution board used in such an emergency power supply system.

近年、電力消費家（需要家）の場所において、分散電源装置として燃料電池を配備し、燃料電池からの電力と電気事業者の系統電源（商用電源）からの電力とを組み合わせてその電力消費家における電力消費を賄うようにした分散型の電源システムが注目を集めている。   In recent years, a fuel cell has been deployed as a distributed power supply device at the location of a power consumer (customer), and the power consumer combines the power from the fuel cell with the power from the grid power supply (commercial power) of an electric power company. A distributed power supply system that covers power consumption in the world is attracting attention.

燃料電池は直流電力を発生するが、電力消費家の宅内においては系統電源からの交流電力に重畳して負荷に配電する必要があるから、分散電源である燃料電池を系統電源に連系させる必要がある。燃料電池を系統電源に連系させるために、燃料電池が出力する直流電力を交流電力に変換し、その周波数や電圧を系統電源からの電力に適合させるパワーコンディショナ（ＰＣＳ）が用いられる。パワーコンディショナからの交流電力の出力線は、一般に、電力消費家の宅内に設けられる分電盤において、系統電源側からの配電線に接続され、これによって、電力消費家の宅内にある負荷に対して、燃料電池からの交流電力と系統電源からの交流電力とが一緒に供給されるようになる。   Fuel cells generate DC power, but it is necessary to superimpose AC power from the system power supply and distribute it to the load in the homes of power consumers, so it is necessary to link the fuel cell, which is a distributed power supply, to the system power supply There is. In order to link the fuel cell to the system power supply, a power conditioner (PCS) that converts the DC power output from the fuel cell into AC power and adapts the frequency and voltage to the power from the system power supply is used. The output line of AC power from the inverter is generally connected to the distribution line from the system power supply side in the distribution board provided in the home of the power consumer, and this allows the load to be placed in the home of the power consumer. On the other hand, AC power from the fuel cell and AC power from the system power supply are supplied together.

図３は、このように燃料電池による分散電源を系統電源に連系させて使用するための従来の電源システムの構成を示すブロック図である。   FIG. 3 is a block diagram showing the configuration of a conventional power supply system for using the distributed power supply by the fuel cell in this way linked to the system power supply.

分散電源として燃料電池を含み交流電力を出力する燃料電池システム８１が設けられており、燃料電池システム８１の出力は分電盤８２に接続している。分電盤８２は、系統電源にも接続し、系統電源からの交流電力と燃料電池システム８１の交流電力を同一の配電線を介して負荷に供給する。   A fuel cell system 81 that includes a fuel cell as a distributed power source and outputs AC power is provided, and the output of the fuel cell system 81 is connected to a distribution board 82. The distribution board 82 is also connected to the system power supply, and supplies AC power from the system power supply and AC power of the fuel cell system 81 to the load via the same distribution line.

燃料電池システム８１は、燃料電池９１と燃料電池９１で発電された直流電力を交流電力に変換して出力するパワーコンディショナ（ＰＣＳ）９２とを備えている。燃料電池９１は、図３には示していないが、炭化水素からなる燃料、例えば灯油やＬＰＧ（液化石油ガス）などの燃料を改質して水素を生成する改質器と、この水素と酸素（空気）とが供給されて発電する燃料電池本体とを備えている。燃料電池本体は、典型的な燃料電池として、水素及び酸素がそれぞれ供給される負極及び正極と、負極及び正極間に配置され水素イオンが透過可能な電解質膜とを備えている。   The fuel cell system 81 includes a fuel cell 91 and a power conditioner (PCS) 92 that converts DC power generated by the fuel cell 91 into AC power and outputs the AC power. Although not shown in FIG. 3, the fuel cell 91 reforms a fuel made of hydrocarbon, for example, kerosene or LPG (liquefied petroleum gas), to generate hydrogen, and the hydrogen and oxygen. (Air) and a fuel cell main body that generates electric power. The fuel cell main body includes, as a typical fuel cell, a negative electrode and a positive electrode to which hydrogen and oxygen are supplied, respectively, and an electrolyte membrane that is disposed between the negative electrode and the positive electrode and is permeable to hydrogen ions.

パワーコンディショナ９２は、分電盤８２を介して入力する系統電源側の交流電力に連系するように、燃料電池９１からの直流電力を交流電力に変換する。また、燃料電池（改質器や燃料電池本体）を動作させるためにはヒータによってこれらを所定の温度範囲にまで昇温する必要があり、また、改質器に燃料を供給するためにはポンプを動作させる必要がある。このように燃料電池システム８１の運転のためには、ヒータやポンプなどの各種の補機類を動作させる必要があり、ヒータやポンプなどを動作させるための電力は、パワーコンディショナ９２から燃料電池に与えられるようになっている。燃料電池システム８１が定常運転状態に入ってしまえば、ヒータやポンプのための電力としては、燃料電池９１が発電した電力の一部が使用される。しかしながら、燃料電池システム８１自体の始動（立ち上げ）時には、燃料電池９１はまだ発電を開始していないので、系統電源から分電盤８２を介してパワーコンディショナ９２に入力する交流電力からヒータやポンプを動作させるための電力を得るようにしている。   The power conditioner 92 converts the direct current power from the fuel cell 91 into alternating current power so as to be linked to the alternating current power on the system power source side input via the distribution board 82. Further, in order to operate the fuel cell (reformer or fuel cell main body), it is necessary to raise the temperature of the fuel cell to a predetermined temperature range by a heater, and to supply fuel to the reformer, a pump Need to work. As described above, in order to operate the fuel cell system 81, it is necessary to operate various auxiliary devices such as a heater and a pump. The power for operating the heater and the pump is supplied from the power conditioner 92 to the fuel cell. Is to be given to. If the fuel cell system 81 enters a steady operation state, a part of the power generated by the fuel cell 91 is used as power for the heater and pump. However, when the fuel cell system 81 itself is started (started up), the fuel cell 91 has not yet started power generation. Therefore, from the AC power input from the system power supply to the power conditioner 92 via the distribution board 82, the heater and the Electric power for operating the pump is obtained.

ところで系統電源に上述のようにして分散電源を連系させる場合、分散電源で発生した電力によって系統電源側に悪影響が及ぼされることがないようにしなければならない。系統電源に対して悪影響が及ぼされないようにするためにはどうすべきかは、経済産業省資源エネルギー庁がまとめた「系統連系ガイドライン」に示されているが、特に、系統電源側における停電事故が発生した場合には、分散電源を系統電源から解列すべきことが定められている。系統電源における停電事故の際に分散電源が動作していると、停電中であるので本来は充電されていないはずの系統電源側の配電線や配電網が分散電源によって充電されることとなり、停電復旧等の作業における感電事故や、系統復帰時に系統電源側での位相と配電線側での位相が一致しないことによる故障の発生のおそれが生じ、また、故障発生位置の探索を難しくするからである。系統電源側の停電事故に際して分散電源を系統電源から解列するために、分散電源のパワーコンディショナは、系統電源側からの電力供給が途絶えたことを検出した場合に、速やかに分散電源のの動作を停止させ、さらに必要に応じて分散電源システムを配電線から機械的なスイッチあるいは遮断器によって切り離せるように構成されている。   By the way, when the distributed power supply is connected to the system power supply as described above, it is necessary to prevent the power generated by the distributed power supply from adversely affecting the system power supply side. What should be done to prevent adverse effects on the grid power supply is shown in the “Grid Grid Connection Guidelines” compiled by the Agency for Natural Resources and Energy, Ministry of Economy, Trade and Industry. It is stipulated that in the event of occurrence, the distributed power source should be disconnected from the system power source. If a distributed power supply is operating in the event of a power failure in the system power supply, the power distribution line or distribution network on the system power supply side that should not have been originally charged is charged by the distributed power supply because there is a power outage. There is a risk of an electric shock accident during restoration work, etc., and there is a risk of failure due to the phase on the system power supply side and the phase on the distribution line side not matching when the system is restored, and it becomes difficult to find the location of the failure. is there. In order to disconnect the distributed power source from the system power source in the event of a power failure on the system power source side, the power conditioner of the distributed power source promptly turns off the distributed power source when it detects that the power supply from the system power source side has been interrupted. The operation is stopped, and the distributed power supply system can be disconnected from the distribution line by a mechanical switch or a circuit breaker if necessary.

燃料電池は、気象条件等によらずに燃料があり続ける限り動作するものであるから、地震等の災害が発生して系統電源における停電が持続することが想定される場合における非常用電源として有望なものである。しかしながら、分散電源を系統電源に連系して使用している場合には、上述したように保安上等の理由により、系統電源の停電時には分散電源の停止しなければならないので、燃料電池を使用する分散電源であってもそのまま非常用電源として使用できるわけではない。また、燃料電池を一旦停止させた後にその燃料電池を再起動させようとしても、一般には燃料電池の再起動に必要な電力として、系統電源から供給される電力を使用しているので、系統電源の停電時には燃料電池の再起動も行えないこととなる。   Fuel cells operate as long as there is fuel regardless of weather conditions, etc., so they are promising as emergency power sources when disasters such as earthquakes occur and power outages in the system power supply are expected to continue. It is a thing. However, if a distributed power source is used in conjunction with a system power source, a fuel cell is used because the distributed power source must be stopped when the system power source fails due to security reasons as described above. Even a distributed power source that can be used is not directly usable as an emergency power source. Even if the fuel cell is once stopped and then restarted, the power supplied from the system power supply is generally used as the power required for restarting the fuel cell. In the event of a power failure, the fuel cell cannot be restarted.

そこで本発明の目的は、燃料電池を有するとともに系統電源に連系する分散型の電源システムであって、系統電源が通常に稼動している場合には分散電源として動作するとともに、系統電源が停電となった場合においても非常用電源として使用できる非常電源システムを提供することにある。   Accordingly, an object of the present invention is a distributed power system having a fuel cell and connected to a system power supply. When the system power supply is operating normally, the system power supply operates as a distributed power supply and the system power supply An object of the present invention is to provide an emergency power supply system that can be used as an emergency power supply even in such a case.

本発明の別の目的は、このような非常電源システムで用いられる分電盤を提供することにある。   Another object of the present invention is to provide a distribution board used in such an emergency power supply system.

本発明の非常電源システムは、系統電源に連系する燃料電池システムを有する非常電源システムであって、系統電源に接続するとともに母線を介して負荷に電力を供給する分電盤と、系統電源と分電盤における母線との間に設けられた遮断器と、燃料電池システム内に設けられ、燃料電池から直流電力を交流電力に変換して分電盤に供給する第１のパワーコンディショナと、二次電池と、二次電池から直流電力を交流電力に変換して分電盤に供給する第２のパワーコンディショナと、を備え、第１のパワーコンディショナにおいて系統電源の停電を検出したときに、第１のパワーコンディショナは燃料電池システムの動作を停止させるとともに、停電検出信号を遮断器に送出して遮断器を開放状態にし、遮断器が開放状態であるときに、二次電池から第２のパワーコンディショナを介して供給される電力によって燃料電池システムを始動でき、始動後は燃料電池システムから分電盤の母線を介して負荷に交流電力が供給される。 An emergency power supply system of the present invention is an emergency power supply system having a fuel cell system linked to a system power supply, which is connected to the system power supply and supplies power to a load via a bus , a system power supply, A circuit breaker provided between the bus in the distribution board, a first power conditioner provided in the fuel cell system, which converts DC power from the fuel cell into AC power and supplies the AC to the distribution board; A secondary battery and a second power conditioner that converts DC power from the secondary battery into AC power and supplies the power to the distribution board, and when a power failure of the system power supply is detected in the first power conditioner In addition, the first power conditioner stops the operation of the fuel cell system and sends a power failure detection signal to the circuit breaker to open the circuit breaker. When the circuit breaker is open, To start the fuel cell system by power supplied through the second power conditioner from the pond, AC power is supplied after the start via the bus of the distribution board from the fuel cell system load.

本発明の非常電源システムは、系統電源の停電時に、燃料電池システムを始動して燃料電池システムからの電力のみを負荷に供給できるようにしたものである。しかしながら、燃料電池システムの定格出力には限りがあるため、分電盤に接続される負荷が通常負荷と非常負荷である場合には、系統電源が通常動作しているときは両方の負荷に電力が供給され、遮断器が開放状態にあって燃料電池システムが始動した後には、非常負荷のみに電力が供給されるようにすることが好ましい。非常負荷の負荷容量は燃料電池システムの定格出力未満とすることが好ましい。さらに本発明では、遮断器が開放状態にあるときに系統電源が復旧した場合に、燃料電池システムの運転を停止し、その後、遮断器を導通状態に戻し、遮断器が導通状態に戻された後に燃料電池システムを再始動するようにすることが好ましい。   The emergency power supply system of the present invention is configured to start the fuel cell system and supply only the power from the fuel cell system to the load at the time of power failure of the system power supply. However, because the rated output of the fuel cell system is limited, if the load connected to the distribution board is a normal load and an emergency load, power is supplied to both loads when the grid power supply is operating normally. It is preferable that power be supplied only to the emergency load after the circuit breaker is open and the fuel cell system is started. The load capacity of the emergency load is preferably less than the rated output of the fuel cell system. Furthermore, in the present invention, when the system power supply is restored when the circuit breaker is in the open state, the operation of the fuel cell system is stopped, and then the circuit breaker is returned to the conductive state, and the circuit breaker is returned to the conductive state. It is preferable to restart the fuel cell system later.

本発明において、二次電池の定格容量は、燃料電池システムの定格出力１ｋＷあたり、例えば３００Ｗ・ｈ未満である。また、燃料電池システムとしては、炭化水素を燃料とする燃料電池を有するものを用いることが好ましい。   In the present invention, the rated capacity of the secondary battery is, for example, less than 300 W · h per 1 kW of the rated output of the fuel cell system. Moreover, it is preferable to use what has a fuel cell which uses a hydrocarbon as a fuel as a fuel cell system.

本発明の分電盤は、燃料電池システムと系統電源とを連系させ、負荷に電力を供給するために使用される分電盤であって、燃料電池システム及び負荷に接続する母線と、母線と系統電源との間に設けられ、燃料電池システムが系統電源における停電を検出したときに燃料電池システムから送られてくる信号によって開放状態となる遮断器と、を備え、二次電池が出力する直流電力を変換して得られた交流電力を母線に供給可能であって、遮断器が開放状態にあるときに二次電池から供給される電力によって燃料電池システムを始動し、燃料電池システムから得られた電力を負荷に供給できる。 A distribution board according to the present invention is a distribution board used for connecting a fuel cell system and a system power supply and supplying power to a load , and includes a bus connected to the fuel cell system and the load , and a bus. And a circuit breaker that is opened by a signal sent from the fuel cell system when the fuel cell system detects a power failure in the system power source, and the secondary battery outputs AC power obtained by converting DC power can be supplied to the bus, and when the circuit breaker is in an open state, the fuel cell system is started by power supplied from the secondary battery , and obtained from the fuel cell system. The supplied power can be supplied to the load .

本発明では、燃料電池システムを系統電源に連系させた電源システムにおいて、系統電源が停電した場合には一旦は燃料電池システムも停止するものの、その後、分電盤を介して供給される二次電池からの電力を用いて燃料電池システムを始動できるようにしているので、この燃料電池システムからの発電した電力を負荷に供給できるようになる。したがって、本発明の非常電源システムは、平常時には系統電源に連系するとともに、災害などの非常時においては、非常用電源として運転が可能であり、平常時及び非常時の両方において有用である。   In the present invention, in the power supply system in which the fuel cell system is connected to the system power supply, when the system power supply fails, the fuel cell system is temporarily stopped, but then the secondary power supplied via the distribution board is used. Since the fuel cell system can be started using the electric power from the battery, the electric power generated from the fuel cell system can be supplied to the load. Therefore, the emergency power supply system of the present invention is connected to the system power supply in normal times, and can be operated as an emergency power source in an emergency such as a disaster, and is useful in both normal times and emergency times.

次に、本発明の好ましい実施の形態について、図面を参照して説明する。   Next, a preferred embodiment of the present invention will be described with reference to the drawings.

図１は本発明の実施の一形態の非常電源システムを示している。この電源システムは、系統電源に連系するものであって、分散電源として、交流電力を出力する燃料電池システム１１を備えるとともに、系統電源からの電力と燃料電池システム１１からの電力を負荷に供給するための分電盤１４とを備えている。さらにこの電源システムは、系統電源の停電時に燃料電池システム１１を起動するための電力を供給する二次電池１６と、二次電池１６を充電するとともに二次電池１６から出力される直流電力を交流電力に変換して分電盤１４に供給するパワーコンディショナ（ＰＣＳ）１７と、を備えている。二次電池１６としては、例えば、リチウムイオン電池、ニッケル水素電池、あるいは鉛蓄電池などが用いられる。二次電池１６の定格容量は、例えば、燃料電池の定格出力１ｋＷあたり３００Ｗ・ｈ未満とされる。   FIG. 1 shows an emergency power supply system according to an embodiment of the present invention. This power supply system is connected to a system power supply, and includes a fuel cell system 11 that outputs AC power as a distributed power supply, and supplies power from the system power supply and power from the fuel cell system 11 to a load. The distribution board 14 is provided. In addition, the power supply system includes a secondary battery 16 that supplies power for starting the fuel cell system 11 in the event of a power failure of the system power supply, and a DC power that is charged from the secondary battery 16 and that is output from the secondary battery 16 to an alternating current. And a power conditioner (PCS) 17 that converts the electric power and supplies it to the distribution board 14. As the secondary battery 16, for example, a lithium ion battery, a nickel metal hydride battery, or a lead storage battery is used. The rated capacity of the secondary battery 16 is, for example, less than 300 W · h per 1 kW of the rated output of the fuel cell.

分電盤１４は、燃料電池システム１１の出力が接続する母線３１と、系統電源と母線３１との間に設けられた遮断器３２と、母線３１と二次電池１６側のパワーコンディショナ１７との間に設けられたスイッチ３３と、母線３１と負荷との間に設けられるスイッチ３４，３５を備えている。遮断器３２は、燃料電池システム１１内の後述するパワーコンディショナ（ＰＣＳ）１３から停電検出信号を受信した場合に、開放状態（遮断状態）にトリップする、すなわち母線３１を自動的に系統電源から切り離すように構成されている。   The distribution board 14 includes a bus 31 to which the output of the fuel cell system 11 is connected, a circuit breaker 32 provided between the system power supply and the bus 31, a power conditioner 17 on the bus 31 and the secondary battery 16 side, And a switch 34, 35 provided between the bus 31 and the load. When receiving a power failure detection signal from a power conditioner (PCS) 13 (to be described later) in the fuel cell system 11, the circuit breaker 32 trips to an open state (breaking state), that is, the bus 31 is automatically disconnected from the system power supply. Configured to detach.

本実施形態では、電力消費家の宅内の負荷として、系統電源の稼動時のみに電力が供給されていればよい通常負荷４１と、系統電源の稼動時のみならず系統電源の停電時にも電力が供給されるべき非常負荷４２の二種類があるものとする。通常負荷４１はスイッチ３４を介して母線３１に接続し、非常負荷４２はスイッチ３５を介して母線３１に接続している。この電源システムでは、系統電源からの交流電力と燃料電池システム１１からの交流電力とが、分電盤１４を介して、同一の宅内配電線を介して各負荷４１，４２に供給されるようになっている。さらに、二次電池１６が充電状態にある場合には、負荷側での電力消費状況に応じ、二次電池１６から出力されてパワーコンディショナ１７によって直流電力から変換された交流電力も、各負荷４１，４２に供給されるようになっている。燃料電池自体は負荷の急変に対して対応することが難しいものであるので、負荷が急増したときには二次電池１６からの電力を負荷に供給し、負荷が急減したときには二次電池１６を充電するようにすることによって、系統電源が通常状態であるときにこの非常電源システムを効率よく運転させることが可能になる。   In the present embodiment, as a load in the home of a power consumer, the normal load 41 that needs to be supplied only when the system power supply is operated, and the power is supplied not only when the system power supply is operated but also when the system power supply is interrupted. Assume that there are two types of emergency loads 42 to be supplied. The normal load 41 is connected to the bus 31 via the switch 34, and the emergency load 42 is connected to the bus 31 via the switch 35. In this power supply system, AC power from the system power supply and AC power from the fuel cell system 11 are supplied to the loads 41 and 42 via the distribution board 14 and the same in-house distribution line. It has become. Further, when the secondary battery 16 is in a charged state, AC power output from the secondary battery 16 and converted from DC power by the power conditioner 17 according to the power consumption state on the load side is also applied to each load. 41 and 42 are supplied. Since the fuel cell itself is difficult to cope with a sudden load change, the power from the secondary battery 16 is supplied to the load when the load suddenly increases, and the secondary battery 16 is charged when the load suddenly decreases. By doing so, the emergency power supply system can be efficiently operated when the system power supply is in a normal state.

燃料電池システム１１は、燃料を改質して水素を生成する改質器とこの水素と酸素（空気）とが供給されて発電する燃料電池本体とからなる燃料電池１２と、燃料電池１２で発電された直流電力を交流電力に変換して出力するパワーコンディショナ１３とを備えている。燃料としては、灯油またはＬＰＧ（液化石油ガス）または天然ガスが用いられ、したがってこの燃料電池システム１１は、炭化水素を燃料とする燃料電池を有することになる。改質器や燃料電池本体としては、図３に示した従来のシステムにおけるものと同様のものが使用される。   The fuel cell system 11 includes a fuel cell 12 including a reformer that reforms fuel to generate hydrogen, a fuel cell main body that generates power by supplying the hydrogen and oxygen (air), and the fuel cell 12 generates power. And a power conditioner 13 that converts the converted DC power into AC power and outputs the AC power. As fuel, kerosene, LPG (liquefied petroleum gas), or natural gas is used. Therefore, the fuel cell system 11 has a fuel cell using hydrocarbon as fuel. As the reformer and the fuel cell main body, those similar to those in the conventional system shown in FIG. 3 are used.

パワーコンディショナ１３としては、図３に示した従来の電源システムにおいて用いられるパワーコンディショナ９２と同様のものが使用されるが、図１に示すシステムにおけるパワーコンディショナ１３は、系統電源における停電を検出した場合に、燃料電池システム１１の動作を停止させるともに、系統電源における停電を検出した旨の信号（停電検出信号）を分電盤１４に出力する機能を備えている点で、図１に示したものと相違している。なお、系統電源における停電をパワーコンディショナ１３において検出する方法としては、系統電源に連系する分散電源のパワーコンディショナにおいて、現在、一般的に用いられている方法を用いることができる。   As the power conditioner 13, the same one as the power conditioner 92 used in the conventional power supply system shown in FIG. 3 is used, but the power conditioner 13 in the system shown in FIG. In the case where it is detected, the operation of the fuel cell system 11 is stopped, and a function for outputting a power failure detection signal (power failure detection signal) to the distribution board 14 is provided in FIG. It is different from what is shown. In addition, as a method for detecting a power failure in the system power supply in the power conditioner 13, a method generally used at present in a power conditioner of a distributed power supply linked to the system power supply can be used.

次に、この電源システムの動作を説明する。   Next, the operation of this power supply system will be described.

系統電源が正常に機能している場合には、遮断器３２、各スイッチ３３〜３５とも閉じており（導通状態）、系統電源からの交流電力と、燃料電池システム１１からの交流電力と、状況に応じて二次電池１６からのパワーコンディショナ１７で変換された交流電力とが、分電盤１４を介して負荷４１，４２に供給される。燃料電池システム１１が始動していない場合には、燃料電池システム１１を始動するための電力が、系統電源からパワーコンディショナ１３に供給される。また、二次電池１６は、所定の充電レベル以上であるように、パワーコンディショナ１７によって充放電が制御される。本実施形態において、所定の充電レベルとは、燃料電池システム１１の始動に必要な電力のすべてを二次電池１６から供給できる以上の充電レベルとする。   When the system power supply is functioning normally, the circuit breaker 32 and the switches 33 to 35 are both closed (conducting state), the AC power from the system power supply, the AC power from the fuel cell system 11, and the situation Accordingly, the AC power converted by the power conditioner 17 from the secondary battery 16 is supplied to the loads 41 and 42 via the distribution board 14. When the fuel cell system 11 has not been started, power for starting the fuel cell system 11 is supplied from the system power supply to the power conditioner 13. In addition, charging / discharging of the secondary battery 16 is controlled by the power conditioner 17 so as to be equal to or higher than a predetermined charging level. In the present embodiment, the predetermined charge level is a charge level that can supply all of the electric power necessary for starting the fuel cell system 11 from the secondary battery 16.

系統電源が停止すなわち停電したとする。燃料電池システム１１のパワーコンディショナ１３によってこの停電が検出され、その結果、パワーコンディショナ１３は、燃料電池システム１１の運転を自動的に停止させ、また、燃料電池システム１１を必要に応じて分電盤１４から切り離すとともに、停電検出信号を分電盤１４に送出する。その結果、遮断器３２が開放側にトリップして、分電盤１４の母線３１と系統電源とが切り離されることになる。このとき、二次電池１６側のパワーコンディショナ１７も停電を検出し、二次電池１６を自動的に分電盤１４から切り離す。   Assume that the system power supply is stopped, that is, a power failure occurs. This power failure is detected by the power conditioner 13 of the fuel cell system 11. As a result, the power conditioner 13 automatically stops the operation of the fuel cell system 11, and the fuel cell system 11 is separated as necessary. While disconnecting from the switchboard 14, a power failure detection signal is sent to the switchboard 14. As a result, the circuit breaker 32 trips to the open side, and the bus bar 31 of the distribution board 14 and the system power supply are disconnected. At this time, the power conditioner 17 on the secondary battery 16 side also detects a power failure and automatically disconnects the secondary battery 16 from the distribution board 14.

このように分電盤１４の母線３１から、系統電源が切り離され、燃料電池システム１１及び二次電池１６からの電力の供給が停止することにより、負荷４１，４２への交流電力の供給も停止する。この状態で燃料電池システム１１を非常用電源として機能させるためには、まず、スイッチ３４，３５を開放状態として負荷４１，４２を分電盤１４から切り離し、次に、二次電池１６側のパワーコンディショナ１７を作動させて、二次電池１６からの電力をパワーコンディショナ１７で変換して得られる交流電力が分電盤１４に供給されるようにする。そして、燃料電池システム１１のパワーコンディショナ１３を操作して、燃料電池システム１１を始動させる。すなわち、燃料電池１２の各補機の運転を開始させ、燃料電池１２を始動させる。燃料電池１２が始動して所定の直流電力を出力するようになると、その直流電力はパワーコンディショナ１３によって交流電力に変換されて分電盤１４の母線に供給されるようになるから、非常負荷４２につながるスイッチ３５を閉じて非常負荷４２に交流電力が供給されるようにする。   In this way, the system power supply is disconnected from the bus 31 of the distribution board 14 and the supply of power from the fuel cell system 11 and the secondary battery 16 is stopped, so that the supply of AC power to the loads 41 and 42 is also stopped. To do. In order to allow the fuel cell system 11 to function as an emergency power source in this state, first, the switches 34 and 35 are opened to disconnect the loads 41 and 42 from the distribution board 14, and then the power on the secondary battery 16 side. The conditioner 17 is operated so that AC power obtained by converting the power from the secondary battery 16 by the power conditioner 17 is supplied to the distribution board 14. Then, the fuel cell system 11 is started by operating the power conditioner 13 of the fuel cell system 11. That is, the operation of each auxiliary machine of the fuel cell 12 is started and the fuel cell 12 is started. When the fuel cell 12 starts and outputs predetermined DC power, the DC power is converted into AC power by the power conditioner 13 and supplied to the bus of the distribution board 14. The switch 35 connected to 42 is closed so that AC power is supplied to the emergency load 42.

以上のようにして、燃料電池システム１１の再起動が行われ、非常負荷４２に対する交流電力の供給が再開する。   As described above, the fuel cell system 11 is restarted, and the supply of AC power to the emergency load 42 is resumed.

次に、系統電源が停電から復旧した場合の動作を説明する。分電盤１４において遮断器３２よりも系統電源側の位置に、系統電源からの電力で光るパイロットランプを設けておけば、パイロットランプが再点灯したことにより、系統電源が停電から復旧したことを知ることができる。その場合には、手動で燃料電池システム１１を停止させ、必要に応じてスイッチ３３を開放した後に、遮断器３２を閉じて、分電盤１４の母線に系統電源からの電力が供給されるようにする。その後、燃料電池システム１１を再始動させ、また、スイッチ３３、３４を閉じることにより、最初に説明した通常運転状態に戻る。   Next, an operation when the system power supply is restored from a power failure will be described. If a pilot lamp that shines with power from the system power supply is provided at a position closer to the system power supply than the circuit breaker 32 in the distribution board 14, the fact that the system power supply has recovered from the power failure due to the pilot lamp being lit again. I can know. In that case, the fuel cell system 11 is manually stopped, the switch 33 is opened as necessary, the circuit breaker 32 is closed, and the power from the system power supply is supplied to the bus of the distribution board 14. To. Thereafter, the fuel cell system 11 is restarted and the switches 33 and 34 are closed to return to the normal operation state described first.

以上の動作において、系統電源が停電となって遮断器３２が開放状態となった後、系統電源が復旧した場合に遮断器３２を再び投入する（オン状態とする）が、遮断器３２を投入する時点では燃料電池システム１１は停止していなければならない。そこで、燃料電池システム１１が動作している、あるいは燃料電池システム１１がその始動過程にあるときには、開放状態の遮断器３２が再投入されないようにするインターロック装置を分電盤１４に設けることが好ましい。   In the above operation, after the system power supply is interrupted and the circuit breaker 32 is opened, the circuit breaker 32 is turned on again (turned on) when the system power supply is restored. At this time, the fuel cell system 11 must be stopped. Therefore, when the fuel cell system 11 is operating or the fuel cell system 11 is in the starting process, an interlock device that prevents the circuit breaker 32 in the open state from being turned on again may be provided in the distribution board 14. preferable.

また、上述の手順においては、燃料電池システム１１の始動や各スイッチ３３〜３５のオンオフ、各パワーコンディショナ１３，１７の操作などは、操作員による手動で行われることとしているが、これらのプロセスを自動で行えるように、分電盤１４に制御回路を設けるようにしてもよい。図２は、制御回路を備えた非常電源システムを示すブロック図である。   In the above-described procedure, the fuel cell system 11 is started, the switches 33 to 35 are turned on and off, and the power conditioners 13 and 17 are manually operated. A control circuit may be provided on the distribution board 14 so that the above can be performed automatically. FIG. 2 is a block diagram illustrating an emergency power supply system including a control circuit.

図２に示す非常電源システムは、図１に示す非常電源システムとは、分電盤１４内に制御回路３６が設けられている点で相違する。制御回路３６は、分電盤１４内の遮断器３２を導通状態に復帰させたり、分電盤１４内の各スイッチ３３〜３５を制御することができるとともに、燃料電池システム１１内のパワーコンディショナ１３や、二次電池１６からの直流電力を交流電力に変換するパワーコンディショナ１７に対して指令を出すことができるように構成されている。パワーコンディショナ１３、１７に対して制御回路３６からの指令を伝達するために、分電盤１４とこれらのパワーコンディショナ１３、１７との間には、信号線３７，３８が設けられている。   The emergency power supply system shown in FIG. 2 is different from the emergency power supply system shown in FIG. 1 in that a control circuit 36 is provided in the distribution board 14. The control circuit 36 can return the circuit breaker 32 in the distribution board 14 to a conductive state, can control the switches 33 to 35 in the distribution board 14, and is a power conditioner in the fuel cell system 11. 13 or a power conditioner 17 that converts the DC power from the secondary battery 16 into AC power. In order to transmit a command from the control circuit 36 to the power conditioners 13 and 17, signal lines 37 and 38 are provided between the distribution board 14 and the power conditioners 13 and 17. .

制御回路３６は、例えば、非常運転モード移行のための押しボタンスイッチ（非常運転スイッチ）と、通常運転モード移行のための押しボタンスイッチ（通常運転スイッチ）を備えている。系統電源が停電し、上述したように遮断器３２が開放状態にトリップし、燃料電池システム１１及び二次電池１６からの電力の供給が停止した状態で、非常運転スイッチが操作されると、制御回路３６は、上述したスイッチ３４，３５を開放状態にするところから燃料電池システム１１を始動させ、スイッチ３５をオン状態にするところまでの処理を自動的に実行する。また、非常運転モードにあるときに通常運転スイッチが操作されたら、制御回路３６は、系統電源が復旧したことを確認した上で、燃料電池システム１１の停止と遮断器３２の投入から燃料電池システムの再始動、スイッチ３３，３４の投入までの処理を自動的に実行する。このような制御回路３６を設けることによって、本発明に基づく非常電源システムの運転操作を簡単に行えるようになる。   The control circuit 36 includes, for example, a push button switch (emergency operation switch) for shifting to the emergency operation mode and a push button switch (normal operation switch) for shifting to the normal operation mode. Control is performed when the emergency operation switch is operated in the state where the system power supply is cut off, the circuit breaker 32 is tripped to the open state as described above, and the power supply from the fuel cell system 11 and the secondary battery 16 is stopped. The circuit 36 automatically executes the processing from the time when the switches 34 and 35 are opened to the time when the fuel cell system 11 is started and the time when the switch 35 is turned on. When the normal operation switch is operated in the emergency operation mode, the control circuit 36 confirms that the system power supply has been restored, and then starts the fuel cell system 11 from the stop and the circuit breaker 32 to the fuel cell system. Are automatically executed until the switches 33 and 34 are turned on. By providing such a control circuit 36, the operation of the emergency power supply system according to the present invention can be easily performed.

本発明の実施の一形態の非常電源システムの構成を示すブロック図である。It is a block diagram which shows the structure of the emergency power supply system of one Embodiment of this invention. 本発明の別の実施形態の非常電源システムの構成を示すブロック図である。It is a block diagram which shows the structure of the emergency power supply system of another embodiment of this invention. 従来の電源システムの構成を示すブロック図である。It is a block diagram which shows the structure of the conventional power supply system.

符号の説明Explanation of symbols

１１，８１ 燃料電池システム
１２，９１ 燃料電池
１３，１７，９２ パワーコンディショナ（ＰＣＳ）
１４，８２ 分電盤
１６ 二次電池
３１ 母線
３２ 遮断器
３３〜３５ スイッチ
３６ 制御回路
３７，３８ 信号線
４１ 通常負荷
４２ 非常負荷 11, 81 Fuel cell system 12, 91 Fuel cell 13, 17, 92 Power conditioner (PCS)
14,82 Distribution board 16 Secondary battery 31 Bus 32 Breaker 33-35 Switch 36 Control circuit 37, 38 Signal line 41 Normal load 42 Emergency load

Claims (8)

系統電源に連系する燃料電池システムを有する非常電源システムであって、
前記系統電源に接続するとともに母線を介して負荷に電力を供給する分電盤と、
前記系統電源と前記分電盤における前記母線との間に設けられた遮断器と、
前記燃料電池システム内に設けられ、燃料電池から直流電力を交流電力に変換して前記分電盤に供給する第１のパワーコンディショナと、
二次電池と、
前記二次電池から直流電力を交流電力に変換して前記分電盤に供給する第２のパワーコンディショナと、
を備え、
前記第１のパワーコンディショナにおいて前記系統電源の停電を検出したときに、前記第１のパワーコンディショナは前記燃料電池システムの動作を停止させるとともに、停電検出信号を前記遮断器に送出して前記遮断器を開放状態にし、
前記遮断器が開放状態であるときに、前記二次電池から前記第２のパワーコンディショナを介して供給される電力によって前記燃料電池システムを始動でき、始動後は該燃料電池システムから前記分電盤の前記母線を介して前記負荷に交流電力が供給されるようにした、非常電源システム。 An emergency power supply system having a fuel cell system linked to a system power supply,
A distribution board for connecting to the system power supply and supplying power to the load via the bus ;
A breaker disposed between the generatrix of the distribution board and the system power supply,
A first power conditioner provided in the fuel cell system, which converts DC power from the fuel cell to AC power and supplies the AC to the distribution board;
A secondary battery,
A second power conditioner that converts DC power from the secondary battery into AC power and supplies the power to the distribution board;
With
When the power failure of the system power supply is detected in the first power conditioner, the first power conditioner stops the operation of the fuel cell system and sends a power failure detection signal to the circuit breaker. Open the circuit breaker,
When the circuit breaker is in an open state, the fuel cell system can be started by the electric power supplied from the secondary battery via the second power conditioner. An emergency power supply system in which AC power is supplied to the load via the bus bar . 前記分電盤に接続される負荷は、通常負荷と非常負荷であり、前記系統電源が通常動作しているときは前記通常負荷及び前記非常負荷に電力が供給され、前記遮断器が開放状態にあって前記燃料電池システムが始動した後には、前記非常負荷のみに電力が供給される、請求項１に記載の非常電源システム。   The load connected to the distribution board is a normal load and an emergency load. When the system power supply is operating normally, power is supplied to the normal load and the emergency load, and the circuit breaker is opened. The emergency power supply system according to claim 1, wherein power is supplied only to the emergency load after the fuel cell system is started. 前記非常負荷の負荷容量は前記燃料電池システムの定格出力未満である、請求項２に記載の非常電源システム。   The emergency power supply system according to claim 2, wherein a load capacity of the emergency load is less than a rated output of the fuel cell system. 前記遮断器が開放状態にあるときに前記系統電源が復旧した場合に、前記燃料電池システムの運転が停止され、その後、前記遮断器が導通状態に戻され、前記遮断器が導通状態に戻された後に、前記燃料電池システムが再始動される、請求項１乃至３のいずれか１項に記載の非常電源システム。   When the system power supply is restored when the circuit breaker is in the open state, the operation of the fuel cell system is stopped, and then the circuit breaker is returned to the conductive state, and the circuit breaker is returned to the conductive state. The emergency power supply system according to any one of claims 1 to 3, wherein the fuel cell system is restarted later. 前記燃料電池システムの定格出力１ｋＷあたり、前記二次電池の定格容量が３００Ｗ・ｈ未満である、請求項１乃至４のいずれか１項に記載の電源システム。   5. The power supply system according to claim 1, wherein the rated capacity of the secondary battery is less than 300 W · h per rated output of 1 kW of the fuel cell system. 前記燃料電池システムは、炭化水素を燃料とする燃料電池を有する、請求項１乃至５のいずれか１項に記載の電源システム。   The power supply system according to any one of claims 1 to 5, wherein the fuel cell system includes a fuel cell using hydrocarbon as a fuel. 燃料電池システムと系統電源とを連系させ、負荷に電力を供給するために使用される分電盤であって、
前記燃料電池システム及び前記負荷に接続する母線と、
前記母線と前記系統電源との間に設けられ、前記燃料電池システムが前記系統電源における停電を検出したときに前記燃料電池システムから送られてくる信号によって開放状態となる遮断器と、
を備え、
二次電池が出力する直流電力を変換して得られた交流電力を前記母線に供給可能であって、前記遮断器が開放状態にあるときに前記二次電池から供給される電力によって前記燃料電池システムを始動し、該燃料電池システムから得られた電力を前記負荷に供給できるようにした分電盤。 A distribution board used to link a fuel cell system and a system power source and supply power to a load,
A bus connected to the fuel cell system and the load ;
A circuit breaker that is provided between the bus and the system power supply and is opened by a signal sent from the fuel cell system when the fuel cell system detects a power failure in the system power supply;
With
AC power obtained by converting DC power output from a secondary battery can be supplied to the bus, and the fuel cell is powered by power supplied from the secondary battery when the circuit breaker is in an open state. The distribution board which started the system and was able to supply the electric power obtained from this fuel cell system to the said load . 前記負荷として通常負荷と非常負荷が接続され、前記系統電源が通常動作しているときは前記通常負荷及び前記非常負荷に電力を供給し、前記遮断器が開放状態にあって前記燃料電池システムが始動した後には、前記非常負荷のみに電力を供給する、請求項７に記載の分電盤。 A normal load and an emergency load are connected as the load, and when the grid power supply is operating normally, power is supplied to the normal load and the emergency load, and the circuit breaker is in an open state so that the fuel cell system is The distribution board according to claim 7, wherein power is supplied only to the emergency load after starting.
JP2006047004A 2006-02-23 2006-02-23 Emergency power supply system using fuel cell and distribution board Active JP4868883B2 (en)

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