JP3725827B2 - Standby power system and operation method thereof - Google Patents

Standby power system and operation method thereof Download PDF

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JP3725827B2
JP3725827B2 JP2002043665A JP2002043665A JP3725827B2 JP 3725827 B2 JP3725827 B2 JP 3725827B2 JP 2002043665 A JP2002043665 A JP 2002043665A JP 2002043665 A JP2002043665 A JP 2002043665A JP 3725827 B2 JP3725827 B2 JP 3725827B2
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power supply
terminal
storage battery
changeover switch
load
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JP2003244867A5 (en
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正道 伊藤
信悟 大場
健一郎 渡辺
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Obayashi Corp
Yuasa Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • 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

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Description

【０００１】
【発明の属する技術分野】
本発明は、商用電源の遮断時等に使用される予備電源システム及びその運転方法に関するもので、特に、その予備電源システムを構成する配線のコストが低減できる予備電源システム及びその運転方法に関するものである。
【０００２】
【従来の技術】
消防法等によって設置が義務付けられている非常用照明設備等に商用電源（ＡＣ電源）の遮断時に電力を供給するために、通常時は商用電源を整流器を介して充電される蓄電池を設けて、商用電源の遮断時に該蓄電池から非常用照明設備等に電力を供給する予備電源システムが知られている。
【０００３】
この種の予備電源システムとして、特開平４−１７２９３１号公報に記載のものがある。
以下、図３を用いて従来の予備電源システムについて説明する。
前記公報には、三線式の商用電源(1)からの交流電力を整流する第１及び第２の整流器(2-1,2-2)と、前記各整流器からの直流電力がそれぞれの第１、第２の端子(O11,O12,O21,O22)を介して供給されるようにした第１及び第２の蓄電池(3-1,3-2)とからなり、かつ前記第１の蓄電池(3-1)の第２の端子(O12)を第２の蓄電地(3-2)の第１の端子(O21)に接続して中間端子(O)とするとともに、前記第１の蓄電池(3-1)の第１の端子(O11)(P)と前記中間端子(O)との間に接点(MC-A)を介して第１の負荷(4-1)（交直両用負荷）を接続し、前記中間端子(O)と第２の蓄電池(3-2)の第２の端子(O22)(N)との間に接点(MC-A)を介して第２の負荷(4-2)（交直両用負荷）を接続し、前記三線式の商用電源の各線(R,G,S)を接点(MC-B,MC-A)を介して第１の蓄電池(3-1)の第１の端子(P)(O11)、中間端子(O)、第２の蓄電池(3-2)の第２の端子(N)(O22)に接続し、前記接点(MC-A,MC-B)をオン、オフさせて商用電源の受電時は商用電源(1)からの交流電力が前記第１、第２の負荷(4-1,4-2)に供給され、商用電源の停電時は第１、第２の蓄電池(3-1,3-2)からの直流電力が前記第１、第２の負荷(4-1,4-2)に供給されるようにした防災設備用電源システムが記載されている。
【０００４】
前記構成によって、商用電源１から交流電力の受電時には、接点(MC-B)をオンにすると共に、接点(MC-A)をオフにする。
そして、商用電源から接点(MC-B)を介してR相とG相とから第１の負荷(4-1)に交流電力を給電し、G相とS相とから第２の負荷(4-2)に交流電力を給電する。
また、商用電源１の停電(遮断)時には、接点(MC-A)をオンにすると共に、接点(MC-B)をオフにする。
そして、蓄電池(3-1,3-2)から、接点(MC-A)を介して、端子(P)と中間端子(O)から第１の負荷(4-1)に直流電力を給電し、中間端子(O)と端子(N)とから第２の負荷(4-2)に直流電力を給電する。
【０００５】
したがって、第１の負荷(4-1)に流れる直流電流をI1、第２の負荷(4-2)に流れる直流電流をI2とすると、第１の負荷(4-1)と第２の負荷(4-2)の接続点と中間端子(O)との間に流れる直流電流はI1−I2となる。
ここで、I1≧I2 であれば、全ての電路にI1に耐え得る配線材料を用いれば良く、配線材料のコストを低減させることができる。
【０００６】
【発明が解決しようとする課題】
しかし、前記公報に記載の予備電源システムでは、第１の及び第２の整流器(2-1,2-2)と第１及び第２の蓄電池(3-1,3-2)とが、それぞれ対応付けられて接続されているために、どちらか一方の整流器が故障した場合には、故障した側の蓄電池に対する充電ができなくなるという問題があった。
【０００７】
本発明の課題
（目的）は、前述した配線材料のコスト低減が実現できる予備電源システムを、２組の整流器で２組の蓄電池を充電する予備電源システムにおいて、どちらか一方の整流器が故障した場合にも、故障した側の蓄電池に対する充電ができなくなるという問題を解決した信頼度の高い予備電源システムを提供することにある。
また、前記予備電源システムを、１台の整流器で２組の蓄電池を充電するようにしたメンテナンスの工数とコストの低減を実現した予備電源システムを提供することにある。
【０００８】
【課題を解決するための手段】
前記課題を解決するために、商用電源（P1,P2）から供給される交流電力を整流器(R1,R2)に与え、整流出力で蓄電池(B1,B2)を充電する予備電源装置を２組設けると共に、前記２組の予備電源装置の一方の蓄電池（B1）の負極端子（T2）と他方の蓄電池（B2）の正極端子（T3）を短絡して中間端子（T5）とする第１の切換スイッチ（S1）を設け、 商用電源の遮断時に、前記第１の切換スイッチ(S1)をオンにして、前記一方の蓄電池(B1)の正極端子(T1)と中間端子(T5)から第１の負荷（F1）に直流電力を供給すると共に、他方の蓄電池(B2)の負極端子(T4)と前記中間端子(T5)から第２の負荷（F2）に直流電力を供給する予備電源システムにおいて、
前記２組の予備電源装置の各蓄電池(B1,B2）の正極端子（T1,T3）間と、負極端子（T2,T4）間を、それぞれ短絡する第２の切換スイッチ（S2）を設け、前記第２の切換スイッチ(S2)をオンにすると共に、前記第１の切換スイッチ(S1)をオフにして、前記各蓄電池(B1,B2)を並列に充電する。（請求項１）
【０００９】
また、請求項１に記載の予備電源システムにおいて、前記一方の蓄電池（B1）の正極端子（T1）と中間端子（T5）から第１の負荷(F1)への直流電力供給路及び他方の蓄電池（B2）の負極端子(T4)と中間端子(T5)から第２の負荷(F2)への直流電力供給路に、商用電源の遮断時にオンとなる第３の切換スイッチ（S3）を設け、
前記第1及び第２の負荷(F1,F2)には、商用電源から第４の切換スイッチ（S4）を介して単相３線式で交流電力が供給されるようにする。（請求項２）
なお、第４の切換スイッチ（S4）は、商用電源の遮断時には、オフにされる。
【００１０】
また、前記請求項１又は２に記載の予備電源システムを運転する予備電源システムの運転方法において、
前記第２の切換スイッチ(S2)をオンにし、前記第１の切換スイッチ(S1)をオフにした状態で２組の予備電源装置の一方を停止して、他方の整流器から各蓄電池(B1,B2)に対する充電を行うので、一方の整流器が故障した場合や、点検時にも各蓄電池(B1,B2)に対する充電を正常に行うことができる。（請求項３）
また、故障や点検時以外に一方の整流器を停止させることも可能である。
【００１１】
さらに、商用電源（P1）から供給される交流電力を整流器(R1)に与え、整流出力で２組の蓄電池（B1,B2）を充電する予備電源システムにおいて、
前記２組の蓄電池(B1,B2)の内の一方の蓄電池（B1）の負極端子(T2)と他方の蓄電池（B2）の正極端子（T3）を短絡して中間端子(T5)とする第１の切換スイッチ（S1）と、前記２組の蓄電池(B1,B2)の正極端子（T1,T3）間と、負極端子（T2,T4）間を、それぞれ短絡する第２の切換スイッチ（S2）を設け、
商用電源の遮断時に、前記第１の切換スイッチ(S1)をオンにすると共に前記第２の切換スイッチ(S2)をオフにして、前記一方の蓄電池(B1)の正極端子(T1)と中間端子(T5)から第１の負荷（F1）に直流電力を供給すると共に、他方の蓄電池(B2)の負極端子(T4)と前記中間端子(T5)から第２の負荷（F2）に直流電力を供給する。（請求項４）
【００１２】
また、請求項４に記載の予備電源システムにおいて、
前記一方の蓄電池(B1)の正極端子(T1)と中間端子(T5)から第１の負荷(F1)への直流電力供給路及び他方の蓄電池(B2)の負極端子(T4)と中間端子(T5)から第２の負荷(F2)への直流電力供給路に、商用電源の遮断時にオンとなる第３の切換スイッチ（S3）を設け、 前記第1及び第２の負荷(F1,F2)には、商用電源から第４の切換スイッチ（S4）を介して単相３線式で交流電力が供給されるようにする。（請求項５）
【００１３】
【発明の実施の形態】
図１を用いて本発明の予備電源システムの第1の実施の形態の説明をする。
図１において、単相又は３相の商用電源(P1)(P2)からの交流電力を遮断器（M1）（M3）を介して整流する第１及び第２の整流器(R1)(R2)と、前記各整流器(R1)(R2)からの直流電力を遮断器（M2）（M4）を介して、それぞれの第１、第２の端子(T1,T3)(T2,T4)を介して供給する第１及び第２の蓄電池(B1)(B2)とからなる。（図１では、単相又は３相商用電源（P1)(P2）を別のものとして記載しているが同一の商用電源にすることも可能である。また、図１では、第１の端子(T1)(T3)を正極端子とし、第２の端子(T2)(T4)を負極端子としている。）
また、前記第１の蓄電池(B1)の第２の端子(T2)を第１の切換スイッチ（S1）を介して第２の蓄電池(B2)の第１の端子(T3)に接続して中間端子(T5)とする。
【００１４】
また、前記第１の蓄電池(B1)の第１の端子(T1)と第２の端子（T2）を第２の切換スイッチ（S2）を介して第２の蓄電池(B2)の第１の端子(T3)と第２の端子(T4)に接続する。
また、前記第１の蓄電池(B1)の第１の端子(T1)と前記中間端子(T5)との間に第３の切換スイッチ(S3)を介して第１の負荷(F1)（交直両用負荷）を接続し、前記中間端子（T5）と第２の蓄電池(B2)の第２の端子(T4)との間に第３の切換スイッチ(S3)を介して第２の負荷(F2)（交直両用負荷）を接続する。
【００１５】
さらに、単相三線式の商用電源（P3）の各線を第４の切換スイッチ（S4）を介して前記第１の蓄電池(B1)の第１の端子（T1）、中間端子（T5）、第２の蓄電池(B2)の第２の端子（T4）に接続する。
【００１６】
前記構成において、第１〜第４の切換スイッチ（S1)(S2)(S3)(S4）を切換えて商用電源の受電時は商用電源からの交流電力が前記第１、第２の負荷(F1)(F2)に供給され（図１の状態）、商用電源の停電時は第１、第２の蓄電池(B1)(B2)からの直流電力が前記第１、第２の負荷に供給される。
【００１７】
図１の構成でも、第１の負荷(F1)に流れる直流電流をI1、第２の負荷(F2)に流れる直流電流をI2とすると、第１の負荷(F1)と第２の負荷(F2)の接続点（NE）と中間端子(T5)との間に流れる直流電流はI1−I2となる。
ここで、I1≧I2 であれば、全ての電路にI1に耐え得る配線材料を用いれば良く、配線材料のコストを低減させることができる点は図３の従来のものと同様である。
【００１８】
図１の第１の実施の形態では、第１の蓄電池（B1）と第２の蓄電池（B2）との間に第２の切換スイッチ（S2）が設けられていて、第１の蓄電池（B1）と第２の蓄電池（B2）とが商用電源からの充電時には並列接続されているので、前記第1の整流器(R1)又は第２の整流器（R2）のいずれか一方の整流器が故障した場合にも、故障した側の蓄電池に対する充電ができ、冗長性を高めるという効果を奏することできる。
また、前記第１の整流器(R1)又は第２の整流器(R2)の少なくとも一方を複数のユニットで構成し、それを(n+1)方式で運転するようにすれば、更に信頼性を向上させることができる。
【００１９】
図２を用いて本発明の予備電源システムの第２の実施の形態の説明をする。
図２において、単相又は３相の商用電源(P1)からの交流電力を遮断器（M1）を介して整流する整流器(R1)と、前記整流器(R1)からの直流電力を遮断器（M2）を介して、第２の切換スイッチ（S2）によって並列に接続された第１及び第２の蓄電池(B1)(B2)を充電する構成となっている。
また、前記第１の蓄電池(B1)の第２の端子(T2)を第１の切換スイッチ（S1）を介して第２の蓄電池(B2)の第１の端子(T3)に接続して中間端子(T5)とする。
【００２０】
また、前記第１の蓄電池(B1)の第１の端子(T1)と前記中間端子(T5)との間に第３の切換スイッチ(S3)を介して第１の負荷(F1)（交直両用負荷）を接続し、前記中間端子（T5）と第２の蓄電池(B2)の第２の端子(T4)との間に第３の切換スイッチ(S3)を介して第２の負荷(F2)（交直両用負荷）を接続する。
【００２１】
さらに、単相三線式の商用電源（P3）の各線を第４の切換スイッチ（S4）を介して前記第１の蓄電池(B1)の第１の端子（T1）、中間端子（T5）、第２の蓄電池(B2)の第２の端子（T4）に接続する。（図２では、第１の端子(T1)(T3)を正極端子とし、第２の端子(T2)(T4)を負極端子としている。）
【００２２】
前記構成において、第１〜第４の切換スイッチ（S1)(S2)(S3)(S4）を切換えて商用電源の受電時は商用電源からの交流電力が前記第１、第２の負荷(F1)(F2)に供給され（図２の状態）、商用電源の停電時は第１、第２の蓄電池(B1)(B2)からの直流電力が前記第１、第２の負荷(F1)(F2)に供給される。
【００２３】
図２の構成でも、第１の負荷(F1)に流れる直流電流をI1、第２の負荷(F2)に流れる直流電流をI2とすると、第１の負荷(F1)と第２の負荷(F2)の接続点（NE）と中間端子(T5)との間に流れる直流電流はI1−I2となる。
ここで、I1≧I2 であれば、全ての電路にI1に耐え得る配線材料を用いれば良く、配線材料のコストを低減させることができる点は図４の従来のものと同様である。
【００２４】
図２の第２の実施の形態では、第１、第２の蓄電池（B1,B2）に対する充電のための整流器(R1)を1台としているので、図１に記載のものに比較して設備のイニシャルコストの低減とメンテナンス工数の削減が可能になるという効果を奏する。
また、図２の実施の形態においても、前記第１の整流器(R1)又は第２の整流器(R2)の少なくとも一方を複数のユニットで構成し、それを(n+1)方式で運転するようにすれば、更に信頼性を向上させることができる。
【００２５】
【発明の効果】
請求項１に記載の発明では、商用電源から供給される交流電力を整流器に与え、整流出力で蓄電池に充電する予備電源装置を２組設けると共に、前記２組の予備電源装置の一方の蓄電池の負極端子と他方の蓄電池の正極端子を短絡して中間端子とする第１の切換スイッチを設け、商用電源の遮断時に、前記第１の切換スイッチをオンにして、前記一方の蓄電池の正極端子と中間端子から第１の負荷に直流電力を供給すると共に、他方の蓄電池の負極端子と前記中間端子から第２の負荷に直流電力を供給する予備電源システムにおいて、
前記２組の予備電源装置の各蓄電池の正極端子間と、負極端子間を、それぞれ短絡する第２の切換スイッチを設け、
前記第２の切換スイッチをオンにすると共に、前記第１の切換スイッチをオフにして、前記各蓄電池を並列に充電する構成にすることにより、２台の整流器から２台の蓄電池を並列に充電できる冗長システムにできるので、予備電源システムとしての信頼性を高めることができる。
【００２６】
また、請求項２に記載の発明では、請求項１に記載の予備電源システムにおいて、前記一方の蓄電池の正極端子と中間端子から第１の負荷への直流電力供給路及び他方の蓄電池の負極端子と中間端子から第２の負荷への直流電力供給路に、商用電源の遮断時にオンとなる第３の切換スイッチを設け、前記第1及び第２の負荷には、商用電源から第４の切換スイッチを介して単相３線式で交流電力が供給されるようにしたので、商用電源の正常時に単相３線式で交流電力が供給される負荷に対する配線を共通に使用できる。
【００２７】
また、請求項３に記載の発明では、前記請求項１又は２に記載の予備電源システムを運転する予備電源システムの運転方法において、前記第２の切換スイッチをオンにし、前記第１の切換スイッチをオフにした状態で２組の予備電源装置の一方の整流器を停止して、他方の整流器から各蓄電池に対する充電を行うので、一方の整流器が故障した場合や、点検時にも各蓄電池に対する充電を正常に行うことができる。
また、故障や点検時以外に一方の整流器を停止させることも可能である。
【００２８】
請求項４に記載の発明では、商用電源から供給される交流電力を整流器に与え、整流出力で２組の蓄電池を充電する予備電源システムにおいて、前記２組の蓄電池の内の一方の蓄電池の負極端子と他方の蓄電池の正極端子を短絡して中間端子とする第１の切換スイッチと、前記２組の蓄電池の正極端子間と、負極端子間を、それぞれ短絡する第２の切換スイッチを設け、商用電源の遮断時に、前記第１の切換スイッチをオンにすると共に前記第２の切換スイッチをオフにして、前記一方の蓄電池の正極端子と中間端子から第１の負荷に直流電力を供給すると共に、他方の蓄電池の負極端子と前記中間端子から第２の負荷に直流電力を供給するようにしたので、整流器を１台とすることができ、イニシャルコストの低減とメンテナンス工数の削減ができると共に、予備電源システムの設置のスペースを小さくすることができる。
【００２９】
また、請求項５に記載の発明では、請求項４に記載の予備電源システムにおいて、前記一方の蓄電池の正極端子と中間端子から第１の負荷への直流電力供給路及び他方の蓄電池の負極端子と中間端子から第２の負荷への直流電力供給路に、商用電源の遮断時にオンとなる第３の切換スイッチを設け、 前記第1及び第２の負荷には、商用電源から第４の切換スイッチを介して単相３線式で交流電力が供給されるようにしたので、商用電源の正常時に単相３線式で交流電力が供給される負荷に対する配線を共通に使用できる。
【図面の簡単な説明】
【図１】本発明の予備電源システムの第1の実施の形態の構成を示す図である。
【図２】本発明の予備電源システムの第２の実施の形態の構成を示す図である。
【図３】従来の予備電源システムの構成を示す図である。
【符号の説明】
P1,P2,P3 商用電源（交流電源）
R1,R2 整流器
M1,M2,M3,M4 遮断器
S1,S2,S3,S4 切換スイッチ
B1,B2 蓄電池
F1,F2 負荷（交直両用負荷）
T1,T2,T3,T4,T5 端子[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a standby power supply system used when a commercial power supply is shut off and the like, and an operation method thereof, and more particularly, to a standby power supply system and an operation method thereof that can reduce the cost of wiring constituting the backup power supply system. is there.
[0002]
[Prior art]
In order to supply power to emergency lighting equipment, etc., which is obliged to be installed by the Fire Service Act, etc., when a commercial power supply (AC power supply) is cut off, a storage battery that normally charges the commercial power supply via a rectifier is provided. A standby power supply system is known that supplies power from the storage battery to emergency lighting equipment or the like when the commercial power supply is shut off.
[0003]
As this type of standby power supply system, there is one described in JP-A-4-172931.
Hereinafter, a conventional standby power supply system will be described with reference to FIG.
The publication discloses first and second rectifiers (2-1, 2-2) for rectifying AC power from a three-wire commercial power source (1), and DC power from each of the rectifiers. , First and second storage batteries (3-1, 3-2) that are supplied via the second terminals (O11, O12, O21, O22), and the first storage battery ( 3-1) the second terminal (O12) is connected to the first terminal (O21) of the second storage battery (3-2) to be an intermediate terminal (O), and the first storage battery ( 3-1) Connect the first load (4-1) (AC / DC load) between the first terminal (O11) (P) and the intermediate terminal (O) via the contact (MC-A). A second load (4-) via a contact (MC-A) between the intermediate terminal (O) and the second terminal (O22) (N) of the second storage battery (3-2). 2) Connect the AC / DC load and connect each line (R, G, S) of the three-wire commercial power supply to the first storage battery (3-1) via the contacts (MC-B, MC-A). First terminal (P) (O11), intermediate terminal (O), second storage battery (3-2) To the second terminal (N) (O22), and the contact (MC-A, MC-B) is turned on and off to receive the AC power from the commercial power source (1) when receiving the commercial power source. 1. DC power from the first and second storage batteries (3-1, 3-2) is supplied to the first load, the second load (4-1, 4-2), and when the commercial power supply is interrupted. A power supply system for disaster prevention equipment that is supplied to the second load (4-1, 4-2) is described.
[0004]
With the above configuration, when receiving AC power from the commercial power source 1, the contact (MC-B) is turned on and the contact (MC-A) is turned off.
Then, AC power is supplied from the R phase and the G phase to the first load (4-1) from the commercial power source via the contact (MC-B), and the second load (4 from the G phase and the S phase). Supply AC power to -2).
When the commercial power supply 1 is interrupted (cut off), the contact (MC-A) is turned on and the contact (MC-B) is turned off.
Then, DC power is supplied from the storage battery (3-1, 3-2) to the first load (4-1) from the terminal (P) and the intermediate terminal (O) via the contact (MC-A). Then, DC power is supplied from the intermediate terminal (O) and the terminal (N) to the second load (4-2).
[0005]
Therefore, if the direct current flowing through the first load (4-1) is I1, and the direct current flowing through the second load (4-2) is I2, the first load (4-1) and the second load The direct current flowing between the connection point of (4-2) and the intermediate terminal (O) is I1−I2.
Here, if I1 ≧ I2, a wiring material that can withstand I1 may be used for all the electric circuits, and the cost of the wiring material can be reduced.
[0006]
[Problems to be solved by the invention]
However, in the standby power supply system described in the publication, the first and second rectifiers (2-1, 2-2) and the first and second storage batteries (3-1, 3-2) are respectively Since they are connected in association with each other, when either one of the rectifiers fails, there is a problem that charging of the storage battery on the failed side becomes impossible.
[0007]
The problem (object) of the present invention is that the standby power supply system capable of realizing the cost reduction of the wiring material described above is a standby power supply system that charges two storage batteries with two sets of rectifiers, and one of the rectifiers fails. Another object of the present invention is to provide a highly reliable standby power supply system that solves the problem that the storage battery on the failed side cannot be charged.
It is another object of the present invention to provide a standby power supply system that realizes a reduction in maintenance man-hours and costs by charging two sets of storage batteries with a single rectifier.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, two sets of standby power supply devices are provided to supply AC power supplied from commercial power sources (P1, P2) to the rectifiers (R1, R2) and charge the storage batteries (B1, B2) with rectified outputs. At the same time, the first switching of the storage battery (B1) of the two sets of standby power supplies and the positive terminal (T3) of the other storage battery (B2) are short-circuited to form an intermediate terminal (T5). A switch (S1) is provided, and when the commercial power supply is shut off, the first changeover switch (S1) is turned on, and the first storage battery (B1) has a positive terminal (T1) and an intermediate terminal (T5) to the first In the standby power supply system for supplying DC power to the load (F1) and supplying DC power from the negative terminal (T4) and the intermediate terminal (T5) of the other storage battery (B2) to the second load (F2),
A second changeover switch (S2) for short-circuiting between the positive terminals (T1, T3) and the negative terminals (T2, T4) of each of the storage batteries (B1, B2) of the two sets of standby power supply devices; The second changeover switch (S2) is turned on, and the first changeover switch (S1) is turned off to charge the storage batteries (B1, B2) in parallel. (Claim 1)
[0009]
Further, in the standby power supply system according to claim 1, a direct current power supply path from the positive terminal (T1) and intermediate terminal (T5) of the one storage battery (B1) to the first load (F1) and the other storage battery. In the DC power supply path from the negative terminal (T4) and intermediate terminal (T5) of (B2) to the second load (F2), a third changeover switch (S3) that is turned on when the commercial power supply is shut off is provided.
The first and second loads (F1, F2) are supplied with AC power from a commercial power source via a fourth changeover switch (S4) in a single-phase three-wire system. (Claim 2)
The fourth changeover switch (S4) is turned off when the commercial power supply is shut off.
[0010]
Further, in the operation method of the standby power supply system for operating the standby power supply system according to claim 1 or 2,
With the second changeover switch (S2) turned on and the first changeover switch (S1) turned off, one of the two sets of standby power supply devices is stopped, and each storage battery (B1, B1, B2) is stopped from the other rectifier. Since charging for B2) is performed, charging of each storage battery (B1, B2) can be performed normally even when one of the rectifiers fails or during inspection. (Claim 3)
In addition, it is possible to stop one of the rectifiers other than at the time of failure or inspection.
[0011]
Furthermore, in the standby power supply system that supplies AC power supplied from the commercial power supply (P1) to the rectifier (R1) and charges the two storage batteries (B1, B2) with the rectified output,
Of the two sets of storage batteries (B1, B2), the negative terminal (T2) of one storage battery (B1) and the positive terminal (T3) of the other storage battery (B2) are short-circuited to form an intermediate terminal (T5). 1 changeover switch (S1), a second changeover switch (S2) that short-circuits between the positive terminals (T1, T3) and negative terminals (T2, T4) of the two storage batteries (B1, B2). )
When the commercial power supply is cut off, the first changeover switch (S1) is turned on and the second changeover switch (S2) is turned off, so that the positive terminal (T1) and the intermediate terminal of the one storage battery (B1) DC power is supplied from (T5) to the first load (F1), and DC power is supplied from the negative terminal (T4) of the other storage battery (B2) and the intermediate terminal (T5) to the second load (F2). Supply. (Claim 4)
[0012]
Further, in the standby power supply system according to claim 4,
The DC power supply path from the positive terminal (T1) and intermediate terminal (T5) of the one storage battery (B1) to the first load (F1) and the negative terminal (T4) and intermediate terminal of the other storage battery (B2) ( The DC power supply path from T5) to the second load (F2) is provided with a third changeover switch (S3) that is turned on when the commercial power supply is cut off, and the first and second loads (F1, F2) The AC power is supplied in a single-phase three-wire system from the commercial power source via the fourth changeover switch (S4). (Claim 5)
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The first embodiment of the standby power supply system of the present invention will be described with reference to FIG.
In FIG. 1, first and second rectifiers (R1) (R2) for rectifying AC power from a single-phase or three-phase commercial power supply (P1) (P2) through circuit breakers (M1) (M3); , DC power from each of the rectifiers (R1) and (R2) is supplied via the circuit breakers (M2) and (M4) via the first and second terminals (T1, T3) (T2, T4), respectively. And first and second storage batteries (B1) and (B2). (In FIG. 1, single-phase or three-phase commercial power supplies (P1) and (P2) are described as separate ones. However, the same commercial power supply can be used. In FIG. (T1) and (T3) are positive terminals, and the second terminals (T2) and (T4) are negative terminals.)
Further, the second terminal (T2) of the first storage battery (B1) is connected to the first terminal (T3) of the second storage battery (B2) via the first changeover switch (S1), and the intermediate Terminal (T5).
[0014]
The first terminal (T1) and the second terminal (T2) of the first storage battery (B1) are connected to the first terminal of the second storage battery (B2) via the second changeover switch (S2). Connect to (T3) and the second terminal (T4).
In addition, the first load (F1) (for both AC and DC) is connected between the first terminal (T1) and the intermediate terminal (T5) of the first storage battery (B1) via a third changeover switch (S3). Load) and a second load (F2) via a third changeover switch (S3) between the intermediate terminal (T5) and the second terminal (T4) of the second storage battery (B2). Connect the AC / DC load.
[0015]
Further, each line of the single-phase three-wire commercial power supply (P3) is connected to the first terminal (T1), the intermediate terminal (T5), the first terminal of the first storage battery (B1) via the fourth changeover switch (S4). The second storage battery (B2) is connected to the second terminal (T4).
[0016]
In the above-described configuration, the first to fourth changeover switches (S1), (S2), (S3), and (S4) are switched, and the AC power from the commercial power supply is received when the commercial power supply is received. ) (F2) (state shown in FIG. 1), and DC power from the first and second storage batteries (B1) and (B2) is supplied to the first and second loads when the commercial power supply fails. .
[0017]
In the configuration of FIG. 1, if the direct current flowing through the first load (F1) is I1, and the direct current flowing through the second load (F2) is I2, the first load (F1) and the second load (F2). ) Between the connection point (NE) and the intermediate terminal (T5) is I1-I2.
Here, if I1 ≧ I2, a wiring material that can withstand I1 may be used for all of the electric paths, and the cost of the wiring material can be reduced as in the conventional case of FIG.
[0018]
In the first embodiment of FIG. 1, the second changeover switch (S2) is provided between the first storage battery (B1) and the second storage battery (B2), and the first storage battery (B1 ) And the second storage battery (B2) are connected in parallel when charging from a commercial power source, so that either the first rectifier (R1) or the second rectifier (R2) fails In addition, the storage battery on the failed side can be charged, and the effect of increasing redundancy can be achieved.
Further, if at least one of the first rectifier (R1) or the second rectifier (R2) is constituted by a plurality of units and is operated by the (n + 1) system, the reliability is further improved. Can be made.
[0019]
A second embodiment of the standby power supply system of the present invention will be described with reference to FIG.
In FIG. 2, a rectifier (R1) that rectifies AC power from a single-phase or three-phase commercial power supply (P1) through a circuit breaker (M1), and DC power from the rectifier (R1) is circuit breaker (M2 ) To charge the first and second storage batteries (B1) and (B2) connected in parallel by the second changeover switch (S2).
Further, the second terminal (T2) of the first storage battery (B1) is connected to the first terminal (T3) of the second storage battery (B2) via the first changeover switch (S1), and the intermediate Terminal (T5).
[0020]
In addition, the first load (F1) (for both AC and DC) is connected between the first terminal (T1) and the intermediate terminal (T5) of the first storage battery (B1) via a third changeover switch (S3). Load) and a second load (F2) via a third changeover switch (S3) between the intermediate terminal (T5) and the second terminal (T4) of the second storage battery (B2). Connect the AC / DC load.
[0021]
Further, each line of the single-phase three-wire commercial power supply (P3) is connected to the first terminal (T1), the intermediate terminal (T5), the first terminal of the first storage battery (B1) via the fourth changeover switch (S4). The second storage battery (B2) is connected to the second terminal (T4). (In FIG. 2, the first terminals (T1) and (T3) are positive terminals, and the second terminals (T2) and (T4) are negative terminals.)
[0022]
In the above-described configuration, the first to fourth changeover switches (S1), (S2), (S3), and (S4) are switched, and the AC power from the commercial power supply is received when the commercial power supply is received. ) (F2) (in the state shown in FIG. 2), the DC power from the first and second storage batteries (B1) and (B2) is supplied from the first and second loads (F1) ( Supplied to F2).
[0023]
In the configuration of FIG. 2, if the direct current flowing through the first load (F1) is I1 and the direct current flowing through the second load (F2) is I2, the first load (F1) and the second load (F2) ) Between the connection point (NE) and the intermediate terminal (T5) is I1-I2.
Here, if I1 ≧ I2, a wiring material that can withstand I1 may be used for all the electric circuits, and the cost of the wiring material can be reduced as in the conventional case of FIG.
[0024]
In the second embodiment of FIG. 2, the rectifier (R1) for charging the first and second storage batteries (B1, B2) is a single unit. The initial cost and maintenance man-hours can be reduced.
Also in the embodiment of FIG. 2, at least one of the first rectifier (R1) or the second rectifier (R2) is constituted by a plurality of units, and is operated in the (n + 1) system. In this case, the reliability can be further improved.
[0025]
【The invention's effect】
According to the first aspect of the present invention, two sets of standby power supply devices are provided for supplying AC power supplied from a commercial power source to the rectifier and charging the storage battery with a rectified output. A first changeover switch that short-circuits the negative electrode terminal and the positive electrode terminal of the other storage battery to serve as an intermediate terminal is provided, and when the commercial power supply is shut off, the first changeover switch is turned on, In the standby power supply system for supplying DC power from the intermediate terminal to the first load and supplying DC power from the negative terminal of the other storage battery and the intermediate terminal to the second load,
A second changeover switch for short-circuiting between the positive electrode terminals and the negative electrode terminals of the storage batteries of the two sets of standby power supply devices;
Charging two storage batteries in parallel from two rectifiers by turning on the second changeover switch and turning off the first changeover switch to charge the storage batteries in parallel. Therefore, the reliability as a standby power supply system can be improved.
[0026]
According to a second aspect of the present invention, in the standby power supply system according to the first aspect, the DC power supply path from the positive terminal and intermediate terminal of the one storage battery to the first load and the negative terminal of the other storage battery And a third changeover switch that is turned on when the commercial power supply is cut off in the DC power supply path from the intermediate terminal to the second load, and the first and second loads have a fourth changeover from the commercial power supply. Since AC power is supplied in a single-phase three-wire system via a switch, wiring for a load to which AC power is supplied in a single-phase three-wire system when the commercial power supply is normal can be used in common.
[0027]
According to a third aspect of the invention, in the operation method of the standby power supply system for operating the standby power supply system according to the first or second aspect, the second changeover switch is turned on, and the first changeover switch is turned on. Since one rectifier of the two sets of standby power supply devices is stopped and the respective rectifiers are charged from the other rectifier, the charging of each of the storage batteries is performed even when one of the rectifiers fails or during inspection. Can be done normally.
In addition, it is possible to stop one of the rectifiers other than at the time of failure or inspection.
[0028]
According to a fourth aspect of the present invention, in a standby power supply system in which AC power supplied from a commercial power source is supplied to a rectifier and two sets of storage batteries are charged with a rectified output, the negative electrode of one of the two sets of storage batteries A first changeover switch that short-circuits the terminal and the positive electrode terminal of the other storage battery to serve as an intermediate terminal, and a second changeover switch that short-circuits between the positive electrode terminal and the negative electrode terminal of the two sets of storage batteries, When commercial power is shut off, the first changeover switch is turned on and the second changeover switch is turned off to supply DC power from the positive terminal and the intermediate terminal of the one storage battery to the first load. Since the DC power is supplied to the second load from the negative electrode terminal and the intermediate terminal of the other storage battery, a single rectifier can be provided, reducing initial costs and reducing maintenance man-hours. It is, it is possible to reduce the space for installation of spare power supply system.
[0029]
According to a fifth aspect of the present invention, in the standby power supply system according to the fourth aspect, the DC power supply path from the positive terminal and intermediate terminal of the one storage battery to the first load and the negative terminal of the other storage battery And a third changeover switch that is turned on when the commercial power supply is cut off in the DC power supply path from the intermediate terminal to the second load, and the first and second loads have a fourth changeover from the commercial power supply. Since AC power is supplied in a single-phase three-wire system via a switch, wiring for a load to which AC power is supplied in a single-phase three-wire system when the commercial power supply is normal can be used in common.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of a first embodiment of a standby power supply system of the present invention.
FIG. 2 is a diagram showing a configuration of a second exemplary embodiment of a standby power supply system according to the present invention.
FIG. 3 is a diagram showing a configuration of a conventional standby power supply system.
[Explanation of symbols]
P1, P2, P3 Commercial power supply (AC power supply)
R1, R2 rectifier
M1, M2, M3, M4 circuit breaker
S1, S2, S3, S4 selector switch
B1, B2 storage battery
F1, F2 load (AC / DC load)
T1, T2, T3, T4, T5 terminals

Claims (5)

商用電源から供給される交流電力を整流器に与え、整流出力で蓄電池を充電する予備電源装置を２組設けると共に、前記２組の予備電源装置の一方の蓄電池の負極端子と他方の蓄電池の正極端子を短絡して中間端子とする第１の切換スイッチを設け、
商用電源の遮断時に、前記第１の切換スイッチをオンにして、前記一方の蓄電池の正極端子と中間端子から第１の負荷に直流電力を供給すると共に、他方の蓄電池の負極端子と前記中間端子から第２の負荷に直流電力を供給する予備電源システムにおいて、
前記２組の予備電源装置の各蓄電池の正極端子間と、負極端子間を、それぞれ短絡する第２の切換スイッチを設け、
前記第２の切換スイッチをオンにすると共に、前記第１の切換スイッチをオフにして、前記各蓄電池を並列に充電することを特徴とする予備電源システム。Two sets of standby power supply devices for supplying AC power supplied from a commercial power source to the rectifier and charging the storage battery with the rectified output are provided. The negative electrode terminal of one storage battery and the positive electrode terminal of the other storage battery of the two sets of standby power supply devices Is provided with a first changeover switch which is short-circuited to be an intermediate terminal,
When the commercial power supply is shut off, the first changeover switch is turned on to supply DC power to the first load from the positive terminal and the intermediate terminal of the one storage battery, and the negative terminal and the intermediate terminal of the other storage battery In the standby power supply system for supplying DC power to the second load from
A second changeover switch for short-circuiting between the positive electrode terminals and the negative electrode terminals of the storage batteries of the two sets of standby power supply devices;
A standby power supply system that turns on the second changeover switch and turns off the first changeover switch to charge the storage batteries in parallel. 請求項１に記載の予備電源システムにおいて、
前記一方の蓄電池の正極端子と中間端子から第１の負荷への直流電力供給路及び他方の蓄電池の負極端子と中間端子から第２の負荷への直流電力供給路に、商用電源の遮断時にオンとなる第３の切換スイッチを設け、
前記第1及び第２の負荷には、商用電源から第４の切換スイッチを介して単相３線式で交流電力が供給されるようにしたことを特徴とする予備電源システム。The standby power supply system according to claim 1,
The DC power supply path from the positive terminal and the intermediate terminal of the one storage battery to the first load and the DC power supply path from the negative terminal and the intermediate terminal of the other storage battery to the second load are turned on when the commercial power supply is shut off. A third changeover switch is provided,
A standby power supply system characterized in that AC power is supplied to the first and second loads from a commercial power supply through a fourth changeover switch in a single-phase three-wire system. 前記請求項１又は２に記載の予備電源システムを運転する予備電源システムの運転方法において、
前記第２の切換スイッチをオンにし、前記第１の切換スイッチをオフにした状態で２組の予備電源装置の一方の整流器を停止して、他方の整流器から各蓄電池に対する充電を行うことを特徴とする予備電源システムの運転方法。In the operation method of the standby power supply system for operating the standby power supply system according to claim 1 or 2,
With the second changeover switch turned on and the first changeover switch turned off, one of the rectifiers of the two sets of standby power supply devices is stopped, and each storage battery is charged from the other rectifier. Operation method of standby power supply system. 商用電源から供給される交流電力を整流器に与え、整流出力で２組の蓄電池を充電する予備電源システムにおいて、
前記２組の蓄電池の内の一方の蓄電池の負極端子と他方の蓄電池の正極端子を短絡して中間端子とする第１の切換スイッチと、
前記２組の蓄電池の正極端子間と、負極端子間を、それぞれ短絡する第２の切換スイッチを設け、
商用電源の遮断時に、前記第１の切換スイッチをオンにすると共に前記第２の切換スイッチをオフにして、前記一方の蓄電池の正極端子と中間端子から第１の負荷に直流電力を供給すると共に、他方の蓄電池の負極端子と前記中間端子から第２の負荷に直流電力を供給する予備電源システム。In a standby power supply system that supplies AC power supplied from a commercial power source to a rectifier and charges two sets of storage batteries with a rectified output,
A first changeover switch that short-circuits the negative terminal of one of the two sets of storage batteries and the positive terminal of the other storage battery to serve as an intermediate terminal;
A second changeover switch for short-circuiting between the positive terminals and the negative terminals of the two sets of storage batteries,
When the commercial power supply is shut off, the first changeover switch is turned on and the second changeover switch is turned off to supply DC power from the positive terminal and the intermediate terminal of the one storage battery to the first load. A standby power supply system for supplying DC power to the second load from the negative terminal of the other storage battery and the intermediate terminal. 請求項４に記載の予備電源システムにおいて、
前記一方の蓄電池の正極端子と中間端子から第１の負荷への直流電力供給路及び他方の蓄電池の負極端子と中間端子から第２の負荷への直流電力供給路に、商用電源の遮断時にオンとなる第３の切換スイッチを設け、 前記第1及び第２の負荷には、商用電源から第４の切換スイッチを介して単相３線式で交流電力が供給されるようにしたことを特徴とする予備電源システム。The standby power supply system according to claim 4,
The DC power supply path from the positive terminal and the intermediate terminal of the one storage battery to the first load and the DC power supply path from the negative terminal and the intermediate terminal of the other storage battery to the second load are turned on when the commercial power supply is shut off. A third changeover switch is provided, and the first and second loads are supplied with AC power from a commercial power source via a fourth changeover switch in a single-phase three-wire system. And standby power system.
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