JPH08289485A - Uninterruptible power supply - Google Patents

Uninterruptible power supply

Info

Publication number
JPH08289485A
JPH08289485A JP7090419A JP9041995A JPH08289485A JP H08289485 A JPH08289485 A JP H08289485A JP 7090419 A JP7090419 A JP 7090419A JP 9041995 A JP9041995 A JP 9041995A JP H08289485 A JPH08289485 A JP H08289485A
Authority
JP
Japan
Prior art keywords
power supply
switch
uninterruptible power
ups
load
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP7090419A
Other languages
Japanese (ja)
Inventor
Nobuyuki Nagai
信幸 永井
Original Assignee
Toshiba Corp
株式会社東芝
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, 株式会社東芝 filed Critical Toshiba Corp
Priority to JP7090419A priority Critical patent/JPH08289485A/en
Publication of JPH08289485A publication Critical patent/JPH08289485A/en
Application status is Pending legal-status Critical

Links

Abstract

PURPOSE: To provide an uninterruptible power supply in which a switch is connected with the other UPS side simultaneously with firing of a stand-by thyristor switch on the other UPS side upon failure of one UPS thereby interrupting the load current instantaneously when the UPS is switched and feeding the load current through the switch during normal operation of the UPS. CONSTITUTION: Upon failure of a UPS 2A, it is detected by a power supply switching control circuit in a switching board and a firing command is delivered to a thyristor switch 3B. When the thyristor switch 3B is fired, power is fed temporarily from both UPSs 2A, 2B thus realizing perfect uninterruptible power supply. On the other hand, a signal is delivered to a switch operating circuit simultaneously with provision of the firing command to the thyristor 3B and the UPS 2B is switched by a switch 6 following to firing of the thyristor switch 3B. An extinction command is also delivered from a power supply operating circuit to a thyristor switch 3A and power is fed to a load 5 only from the UPS 2B. With such constitution, a highly reliable system is realized.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は無停電電源システムに係わり、特に定電圧定周波数の無停電電源装置を各々単独運転させた場合の無停電電源システムに関するものである。 The present invention relates relates to uninterruptible power supply system, to a UPS system particularly when each is singly operated uninterruptible power supply of the constant-voltage constant-frequency.

【0002】 [0002]

【従来の技術】サイリスタ遮断器を備えた無停電電源システムの従来例を図5について説明する。 A conventional example of the Related Art Uninterruptible power systems with thyristor breaker to Figure 5 will be described. 同図において、1A,1Bは交流又は直流電源、2A,2Bは交流又は直流電源1A,1Bから供給された電力を定電圧定周波数の交流電力として出力する無停電電源装置(Unin In the figure, 1A, 1B is AC or DC power source, 2A, 2B uninterruptible power supply to output the AC or DC power source 1A, the electric power supplied from 1B as the AC power of the constant-voltage constant-frequency (Unin
terruptible Power Supply、以下、UPSと記す)、1 terruptible Power Supply, hereinafter referred to as UPS), 1
3A,13Bはサイリスタ遮断器、4A,4BはUPS 3A, 13B thyristor breaker, 4A, 4B is UPS
2A,2B間に流れる横流を抑制するためのリアクトル、5は電子計算機等の負荷である。 2A, reactor for suppressing transverse flow flowing between 2B, 5 is a load such as an electronic computer.

【0003】次に、このように構成された無停電電源システムの作用を説明する。 [0003] Next, the operation of the uninterruptible power system configured in this way. まず、UPS2A,2Bは定常状態でいずれも運転状態にあり、サイリスタ遮断器1 First, UPS2A, 2B is also operating state both in the steady state, the thyristor breaker 1
3Aを点弧、サイリスタ遮断器13Bを消弧した状態で負荷5への電力供給はUPS2Aで行われているとする。 Power supply of the 3A ignition, the load 5 while extinguishing thyristor breaker 13B is assumed to take place in UPS2A.

【0004】ここで、もしUPS2Aに故障が発生したときには、負荷5への電力供給が瞬断しないようにUP [0004] In this case, if when the failure to UPS2A occurs, so that the power supply to the load 5 is not instantaneous interruption UP
S2Aを負荷5から切り離し、UPS2Bで負荷5に対して電力供給を行わなければならない。 Disconnect the S2A from the load 5 must perform power supply to the load 5 in UPS2B. そこで、図示しない切換制御盤内部に設けられた電源切換制御回路でU Therefore, U in power supply switchover control circuit provided in the switching control panel (not shown)
PS2Aの故障を検出し、瞬時にサイリスタ遮断器13 Detecting a failure of PS2A, thyristor breaker 13 instantaneously
Aを消弧、サイリスタ遮断器13Bを点弧することで負荷5への電力供給をUPS2Bで行うとともに、故障したUPS2Aを負荷5から切り離す。 Extinguishing A, it performs power supply to the load 5 by firing thyristor breaker 13B in UPS2B, disconnecting the failed UPS2A from the load 5. このときの電源切換えは負荷5への電力給電を無停電としなければならないので、サイリスタ遮断器13Aを消弧、サイリスタ遮断器13Bを点弧する時間には若干の重なり時間が必要となる。 Since the power switching has to uninterruptible power feed to the load 5 at this time, the thyristor breaker 13A extinguishing, a slight overlap time is required for the time to ignite the thyristor breaker 13B.

【0005】ところが、UPS2A,2Bの出力インピーダンスは非常に小さくなるように製作されているので、上述の重なり時間内でUPS2A,2B相互間の若干の電圧差、位相差で横流が生じ健全なUPS2Bが過負荷となり、インバータ素子を保護する為の過電流検出部が動作して停止することある。 [0005] However, UPS2A, the output impedance of the 2B are fabricated to be very small, UPS2A in the above overlap time, a slight voltage difference between 2B mutually healthy UPS2B lateral flow occurs in the phase difference there becomes overloaded, the overcurrent detection unit for protecting the inverter device sometimes stops after. このUPS2A,2B This UPS2A, 2B
間を流れる横流を最小となるように、サイリスタ遮断器13A,13Bと負荷の間にリアクトル4A,4Bを設けている。 The cross current flowing between so as to minimize, and thyristor breaker 13A, reactor 4A between 13B and the load, the 4B provided.

【0006】 [0006]

【発明が解決しようとする課題】上記のように構成された無停電電源システムにおいて、いずれか一方のUPS In [0008] the uninterruptible power supply system configured as described, either one of the UPS
から負荷5へ電力供給する場合には、リアクトル4Aもしくは4Bに負荷電流が流れリアクトル間で電圧降下が発生する。 When power supply from the load 5, the voltage drop across the reactor reactor 4A or 4B to the load current flows is generated. しかも、その値は負荷5の大小によって変化する為、UPS2A,2Bで電圧や周波数を高精度に制御した電力を負荷5にそのまま供給できなくなり、UP Moreover, the value is a function of the magnitude of the load 5, UPS2A, it will not be able to supply the voltage and frequency to a load 5 power controlled with high precision 2B, UP
Sの特徴である高信頼性の無停電電源システムが損なわれることになる。 So that S is a feature highly reliable uninterruptible power system is compromised.

【0007】本発明は、上記事情に鑑みてなされたもので、その目的は負荷の大小によって影響することなく、 [0007] The present invention has been made in view of the above circumstances, without the purpose of affecting the magnitude of the load,
また電圧や周波数を高精度に制御した電力を負荷に供給可能な複数の無停電電源装置を備えた無停電電源システムを提供することにある。 And to provide an uninterruptible power supply system having a plurality of uninterruptible power supply capable of supplying electric power with a controlled voltage and frequency with high accuracy to the load.

【0008】 [0008]

【課題を解決するための手段】上記目的を達成するために、本発明の請求項1は、単独運転可能な2台の無停電電源装置と、前記無停電電源装置と負荷との間に設けた開閉器と、前記開閉器の両側と前記負荷との間にそれぞれ並列接続されたサイリスタスイッチとリアクトルの直列回路とから構成される無停電電源システムにおいて、 To achieve the above object, according to the Invention The claim 1 of the present invention, the uninterruptible power supply islanding capable of two, arranged between the uninterruptible power supply and the load and switches were, in the uninterruptible power supply system composed of a series circuit of the thyristor switch and a reactor connected in parallel respectively between the both sides of the switch load,
前記無停電電源装置の各々の出力不足電圧を検出する不足電圧検出回路と前記無停電電源装置の各々の出力間の同期状態を監視する同期検出回路とからなる検出回路と、給電中の前記無停電電源装置の出力電圧が低下したことを前記検出回路で検出した時、前記開閉器によって他方の健全な前記無停電電源装置に切り換える切換手段とを備えたことを特徴とする。 A detection circuit comprising a synchronization detection circuit for monitoring the synchronization state between the each of the respective output undervoltage of the UPS and the undervoltage detection circuit for detecting the uninterruptible power supply output, Mu said ENERGIZED when the output voltage of the power supply unit is detected by the detection circuit that it has reduced, characterized by comprising a switching means for switching to the other sound the uninterruptible power supply by the switch.

【0009】本発明の請求項2は、多数の無停電電源装置をいくつかの群に割り振り群内部では並列冗長運転をし,群同士では互いに単独運転可能な無停電電源装置群と、前記無停電電源装置群と各負荷との間にそれぞれ接続された開閉器と、前記開閉器の両側と前記各負荷との間にそれぞれ並列接続されたサイリスタスイッチとリアクトルの直列回路とから構成される無停電電源システムにおいて、前記無停電電源装置群の各々の出力不足電圧を検出する不足電圧検出回路と前記無停電電源装置の各々の出力間の同期状態を監視する同期検出回路とからなる検出回路を前記無停電電源装置群とは独立しかつ負荷数と同数備え、給電中の前記無停電電源装置群の出力電圧が低下したことを前記検出回路で検出した時,前記開閉器によって別の [0009] Claim 2 of the present invention, in allocation group inside a number of uninterruptible power supply into several groups to the parallel redundant operation, the isolated operation can uninterruptible power supply unit to each other in the group each other, the Mu a power supply unit group and the switch respectively connected between the loads, the both sides of the switch Mu constituted by a series circuit of the thyristor switch and a reactor connected in parallel respectively between each load in the power failure power system, a detection circuit comprising a synchronization detection circuit for monitoring the state of synchronization between the respective outputs of the undervoltage detection circuit and the uninterruptible power supply for detecting a respective output undervoltage of the uninterruptible power supply unit the independent and comprising the same number as the number of loads to the uninterruptible power supply unit, when the output voltage of the uninterruptible power supply unit in the power feed is detected by the detection circuit that decreases, another by the switch 全な前記無停電電源装置群に切り換える切換手段とを備えたことを特徴とする。 Characterized by comprising a switching means for switching the entire of the uninterruptible power supply unit.

【0010】 [0010]

【作用】本発明の請求項1によれば、2台単独でUPS According to claim 1 of the effect of the present invention, UPS with two alone
が運転中、一方のUPSで負荷に対して電力を供給している際に、このUPSに故障が発生した場合、開閉器が接続されてなく運転状態で待機している他方のUPS側のサイリスタスイッチが点弧されると同時に開閉器が他方のUPS側に接続されると、故障が発生したUPS側のサイリスタスイッチを消弧する。 But during operation, when it is providing power to the load in one UPS, when a failure in the UPS occurs, the other UPS side of thyristor switch is waiting with no operating state is connected When the switch is ignited simultaneously switch is connected to the other UPS side, a UPS side of the thyristor switch of a failure extinguished. サイリスタスイッチとリアクトルにはUPSが切り換わるまでの瞬時だけしか負荷電流が流れず、UPSの通常運転中には開閉器を介して負荷電流が流れる為リアクトルによる電圧降下は生じない。 The thyristor switch and a reactor only instant until switched is UPS only the load current flows, a voltage drop does not occur due to the reactor order the load current flows through the switch during normal operation of the UPS. またサイリスタスイッチと直列に接続されたリアクトルは、故障しているUPSから運転状態で待機しているUPSに開閉器によって切り換わるまでの瞬時だけUPS間を流れる横流を低減することができる。 The reactor is connected to the thyristor switch in series can reduce the cross current flowing between only instantaneous to switched UPS by switch the UPS from the UPS has failed waiting in operating condition.

【0011】更に、本発明の請求項2によれば、UPS Furthermore, according to claim 2 of the present invention, UPS
をA群、B群内部でそれぞれ並列冗長運転中片側のUP Group A, B inside the one side in parallel redundant operation each group UP
S群が負荷に対して電力を供給している際に、このUP When the S group is supplying power to the load, the UP
S群に故障が発生した場合や各保護回路内部で各UPS Each UPS internally and each protection circuit when a fault in the S group is generated
群の出力電圧低下を検出した場合、開閉器が接続されてなく運転状態で待機しているUPS群側のサイリスタスイッチが点弧されるのと同時にこのUPS群側に開閉器が接続され、故障が発生したUPS群側のサイリスタスイッチを消弧する。 When detecting the output voltage drop of the group, the switch is connected to the same time the UPS group side UPS group side of thyristor switches switch is waiting with no operating state is connected is ignited, the fault There extinguished the thyristor switch of the UPS group side that have occurred. サイリスタスイッチとリアクトルには故障しているUPS群から運転状態で待機しているU U of the thyristor switch and the reactor is waiting in the operating state from the UPS group has failed
PS群に切り換わるまでの瞬時だけしか負荷電流が流れず、UPS群の通常運転中には開閉器を介して負荷電流が流れる為リアクトルによる電圧降下は生じない。 Only instant until switched to PS group only load current flows, a voltage drop does not occur due to the reactor order during normal operation of the UPS group through which the load current through the switch. またサイリスタスイッチと直列に接続されたリアクトルは、 The reactor is connected to the thyristor switch and series,
故障しているUPS群から運転状態で待機しているUP UP from the UPS group has failed waiting on the operating conditions
S群に開閉器によって切り換わるまでの瞬時だけUPS UPS only instantaneous to switched by switches in S group
群間を流れる横流を低減することができる。 It is possible to reduce the cross current flowing between groups.

【0012】 [0012]

【実施例】以下、本発明の実施例を図を参照して説明する。 EXAMPLES Hereinafter, an embodiment of the present invention with reference to FIG. 図1は本発明の一実施例(請求項1対応)の無停電電源システムの主回路単線結線図である。 Figure 1 is a main circuit single-line diagram of the UPS system in one embodiment (claim 1 corresponding) of the present invention.

【0013】同図において、1A,1Bは交流又は直流電源、2A,2Bは交流又は直流電源1A,1Bから供給された電力を定電圧定周波数の交流電力として出力するUPS、3A,3Bは開閉器6で切り換えるときに停電しないよう過渡的に通電するサイリスタスイッチ、5 [0013] In the figure, 1A, 1B outputs AC or DC power source, 2A, 2B AC or DC power source 1A, the electric power supplied from 1B as the AC power of the constant-voltage constant-frequency UPS, 3A, 3B are opened and closed thyristor switch transiently energized so as not to power outage when switching in vessel 6, 5
は電子計算機等の負荷、6はUPS2A,2Bの出力を切り換えるための開閉器である。 The load such as an electronic computer, and 6 is a switch for switching UPS2A, the output of the 2B.

【0014】次に、本実施例の無停電電源システムの作用を説明する。 [0014] Next, the operation of the uninterruptible power system of the present embodiment. まず、UPS2Aを常用電源、UPS2 First, regular power supply UPS2A, UPS2
Bを予備電源としてUPS2Aの出力が開閉器6を介して負荷5へ供給され、UPS2Bが運転状態で待機している状態とする。 The output of UPS2A B as the standby power supply is supplied to the load 5 through a switch 6, a state where UPS2B is waiting in the operating state.

【0015】今、UPS2Aに故障が発生すると、図示しない切換盤の内部に設けられた電源切換制御回路によってUPS2Aの故障が検出され、サイリスタスイッチ3Bに点弧指令が出力される。 [0015] Now, a failure to UPS2A occurs, failure is detected in UPS2A by power supply switchover control circuit provided in the not shown switching 換盤, firing command is output to the thyristor switch 3B. サイリスタスイッチ3B Thyristor switch 3B
が点弧すると、UPS2A,2Bの双方から一時的に電力供給が行われ完全無停電となる。 There When ignited, UPS2A, becomes temporarily performed the power supply completely uninterrupted from both 2B. サイリスタ3Bへの点弧指令と同時に図示しない開閉器操作回路に信号が出力される。 Signal to switch operating circuit (not shown) arc command and simultaneously point to the thyristor 3B is output. すると、サイリスタスイッチ3Bへの点弧に続いて開閉器6がUPS2B側に切り換わる。 Then, it switches 6 Following ignition of the thyristor switch 3B is switched to UPS2B side. 電源切換操作回路からサイリスタスイッチ3Aに消弧指令が出力され、負荷5への電力供給はUPS2Bだけとなる。 Power source switching extinguishing command to the thyristor switch 3A from 換操 operation circuit is output, the power supply to the load 5 is only a UPS2B.

【0016】次に、UPS2Bは常用電源、UPS2A [0016] Next, UPS2B the commercial power source, UPS2A
を予備電源としてUPS2Bの出力が開閉器6を介して負荷5へ供給され、UPS2Aが運転状態で待機しているとする。 The output of UPS2B as a backup power source is supplied to the load 5 through a switch 6, and UPS2A is waiting in the operating state.

【0017】ここで、UPS2Bに故障が発生すると、 [0017] In this case, when a failure occurs in the UPS2B,
図示しない切換盤の内部に設けられた電源切換制御回路によってUPS2Bの故障が検出され、サイリスタスイッチ3Aに点弧指令が出力される。 It detected failure UPS2B by provided in the not shown switching 換盤 power supply switchover control circuit, the firing command is output to the thyristor switch 3A. サイリスタスイッチ3Aが点弧するとUPS2A,2Bの双方から一時的に電力供給が行われ完全無停電となる。 The thyristor switch 3A ignites UPS2A, becomes temporarily performed the power supply completely uninterrupted from both 2B. サイリスタスイッチ3Aへの点弧指令と同時に図示しない開閉器操作回路に信号が出力される。 Signal to switch operating circuit (not shown) at the same time as the firing command point to the thyristor switch 3A is output. すると、サイリスタスイッチ3A Then, the thyristor switch 3A
への点弧に続いて開閉器6がUPS2A側に切り換わる。 Following ignition of the opening and closing unit 6 is switched to UPS2A side. 電源切換操作回路からサイリスタスイッチ3Bに消弧指令が出力され、負荷5への電力供給はUPS2Aだけとなる。 Power source switching extinguishing command to the thyristor switch 3B from 換操 operation circuit is output, the power supply to the load 5 is only a UPS2A.

【0018】従って、それぞれの単独運転をしているU [0018] Therefore, U that each of the single operation
PS2A,2Bの間にリアクトル4A、4Bを接続することでUPS2A,2Bの双方から電力供給が行われているときに流れる横流を抑制することができる。 PS2A, it is possible to suppress the cross current which flows when reactor 4A during 2B, UPS2A by connecting 4B, the power supply from both of 2B have been made. リアクトル4Aもしくは4Bを介して電力供給されている時間は、通常100ms程度の時間だけとなるので、リアクトルの通電容量は不要で大幅に小形化することができる。 Time that are power supplied through a reactor 4A or 4B, because only become normal 100ms about time, current carrying capacity of the reactor can be greatly miniaturized unnecessary. 又サイリスタスイッチ3A,3Bやリアクトル4 The thyristor switch 3A, 3B and reactor 4
A,4Bは、UPS2AもしくはUPS2Bが通常運転中は開閉器6を介して負荷5に電力が供給されているので、リアクトル4A,4Bによる電圧降下は生じない。 A, 4B, since UPS2A or UPS2B is during normal operation power to the load 5 through the switch 6 is supplied, the reactor 4A, the voltage drop does not occur due to 4B.
従って、UPS2A,2Bで高精度に制御された電力を負荷5に直接供給することができる。 Therefore, it is possible to directly supply UPS2A, power which is controlled with high precision 2B load 5. 更にUPS2A, In addition UPS2A,
2Bを常用電源、予備電源と決める必要がなくなり、どちらからのUPSで負荷に電力を供給中、故障が発生したとしてももう一台のUPSで負荷に確実に電力を送ることができるので、高信頼性の無停電電源システムを提供できる。 2B a commercial power source, it is not necessary to determine a spare power in supplying power to the load at the UPS from either, since failure can send reliable power to a load in another single UPS even occurred, high it is possible to provide an uninterruptible power system reliability.

【0019】図2は本発明の他の実施例(請求項1対応)の無停電電源システムの主回路単線結線図であり、 [0019] Figure 2 is a main circuit single-line diagram of the UPS system of another embodiment of the present invention (claim 1 corresponding)
本実施例が図1の実施例と相違する点は、各UPS2 That this embodiment differs from the embodiment of FIG. 1, each UPS2
A,2Bの出力に同期検出回路7と交流不足電圧検出回路8A,8Bから構成された検出回路9を接続している点であり、その他は図1の実施例と同一であるので、同一部分には同一符号を付して重複説明は省略する。 A, the synchronization detection circuit 7 and an AC undervoltage detecting circuit 8A to the output of the 2B, is the point that connects the detecting circuit 9 constructed from 8B, since others are the same as in Example 1, identical parts redundant description the same reference numeral is applied to will be omitted.

【0020】本実施例も図1の無停電電源システムと同様な動作をするが、さらにUPSの負荷側に保護回路9 The present embodiment is also to an uninterruptible power system similar to the operation of FIG. 1, further protection to the load side of the UPS circuit 9
を接続し、その内部に交流不足電圧検出回路8A,8 Connect the AC undervoltage detection in its internal circuit 8A, 8
B、同期検出回路7を接続することで、保護回路9内部でUPS2A,2Bの故障検出とは独立したUPSの出力電圧低下を高速に検出することが可能となり、開閉器を故障したUPSから健全なUPSに無瞬断で切り換えることができる。 B, by connecting the synchronous detection circuit 7, the protection circuit 9 inside UPS2A, the output voltage drop of the independent UPS it is possible to detect at high speed and 2B fault detection, sound from the UPS to the failed switch it can be switched without interruption to a UPS.

【0021】UPS2A,2Bを2台単独運転する場合に、負荷側に保護回路9を接続することで各UPS2 [0021] UPS2A, when two single driving 2B, each by connecting a protection circuit 9 to the load side UPS2
A,2Bに常用電源または予備電源という概念がなくなり、負荷5に対して電力供給しているUPSに故障が発生した場合や、保護回路内部でUPSの出力電圧低下を検出した場合には、故障したUPSから健全なUPSに開閉器を切り換え負荷に対して絶えず連続した電力を供給できるように構成したものである。 A, 2B to eliminate the concept of commercial power or standby power, if a failure in the UPS that the power supplied to the load 5 has been detected and if it occurs, the output voltage drop of the UPS in the protective circuit inside the fault those configured so that it can supply power to constantly continuously against switching the switch load to the sound UPS from the UPS that. 従って、UPSとは独立したUPS出力の故障検出ができる為、従来の故障検出よりも優れた故障検出が行える。 Accordingly, since it is a failure detection independent UPS output and UPS, allows excellent fault detection than conventional failure detection.

【0022】図3は本発明のさらに他の実施例(請求項2対応)の無停電電源システムの主回路単線結線図であり、本実施例では図2のUPSを多数で運転する場合に、A群、B群という群に分け、群内部ではそれぞれ並列冗長運転を行いA群、B群は互いに単独運転しており、負荷の数に合わせて保護回路も多数で使用した場合である。 [0022] Figure 3 is a further main circuit line diagram of the UPS system according to another embodiment (claim 2 support) of the present invention, in the present embodiment to operate in a number of the UPS of FIG. 2, a group, and a group of group B, group a performs a parallel redundant operation respectively within the group, group B is then isolated operation with each other, which when used at multiple protection circuits in accordance with the number of loads. なお、図2と同一番号を付した構成要素は図2 Incidentally, the components denoted by the same numbers as in FIG. 2 FIG. 2
と同一機能のものであるのでその説明は省略する。 Its description will be of the same function as will be omitted.

【0023】図3において、1A〜1Fは交流または直流電源、2A〜2FはUPS、5A〜5Cは負荷、10 [0023] In FIG. 3, 1A-1F are AC or DC power source, 2A-2F are UPS, 5A-5C is a load, 10
A〜10Fは交流電流が過電流になったときに電流を遮断する交流遮断器、9A〜9Cは保護回路であり、例えば保護回路9Aはサイリスタスイッチ3A,3B、リアクトル4A,4B、開閉器6、同期検出回路7、交流不足電圧検出回路8A,8Bより構成されている。 A~10F AC circuit breaker to cut off the current when the alternating current reaches the overcurrent, 9A-C is a protecting circuit, such as the protection circuit 9A thyristor switches 3A, 3B, reactor 4A, 4B, switch 6 , the synchronization detection circuit 7, an AC undervoltage detection circuit 8A, is constructed from 8B.

【0024】本実施例は、図2の実施例と同様無停電電源システムとして同一動作をするが、さらにUPSや負荷の数が増えた場合でも、保護回路の数を調整することで多くの負荷に対応できるという利点がある。 The present examples are the same operation as in Example similar uninterruptible power system of Figure 2, even if a further increase in the number of UPS and load, more load by adjusting the number of protection circuits there is an advantage that can respond to.

【0025】図4は本発明の別の実施例(請求項2対応)の無停電電源システムの主回路単線結線図であり、 FIG. 4 is a main circuit single-line diagram of the UPS system of another embodiment of the present invention (Claim 2 corresponds),
本実施例では図3のUPS群の負荷側にさらに電流モニタ回路11を接続している点が異なるのみであるので、 In this embodiment, since the point connecting the further current monitor circuit 11 to the load side of the UPS group of FIG. 3 is different only,
図3と同一部分には同一符号を付して重複説明は省略する。 Duplicate will be denoted by the same reference numerals in FIG. 3 the same parts will be omitted.

【0026】本実施例では、電流モニタ回路11をUP [0026] In this embodiment, the current monitoring circuit 11 UP
S2A〜2C群と2D〜2F群の負荷側に接続し、各負荷に重要度を付けることで、UPS群が全ての負荷に対して電力供給できなくなった場合に保護回路9A,9 Connected to the load side of the S2A~2C group and 2D~2F group, by attaching importance to each load, protection when UPS group can no longer supply power to all the load circuits 9A, 9
B,9C内部の図示しない電源切換制御回路から開閉器操作回路に信号が出力され、重要度の高い負荷に対しては確実に電力供給を行い、重要度の低い負荷に対しては電力供給が行われているUPS群からの開閉器を電力供給していないUPS群に切り換えるように各UPS群の負荷電流に異常の無いことを監視するように構成されている。 B, is output signal from the power supply switchover control circuit (not shown) of the internal 9C to switch operating circuit, reliably perform power supply for high importance load, the power supply for the less important load and the switch from UPS group being performed is configured to monitor the absence of fault in the load current of each UPS group to switch to UPS group that is not powered.

【0027】 [0027]

【発明の効果】以上説明したように、本発明によれば、 As described in the foregoing, according to the present invention,
サイリスタスイッチとリアクトルには開閉器が故障しているUPSから運転状態で待機しているUPSに切り換わるまでの瞬時だけしか負荷電流が流れないので、リアクトルの通電容量は不要であり、大幅に小型化することができる。 Since only instantaneous to the thyristor switch and a reactor switched to UPS waiting in operating condition from the UPS switch is faulty only load current flows, current carrying capacity of the reactor is not required, much smaller it can be of. またUPSの通常運転中には開閉器を介して負荷電流によって流れる為リアクトルによる電圧降下は生じないし、サイリスタスイッチを直列に接続されたリアクトルによって開閉器が故障しているUPSから運転状態で待機しているUPSに切り換わるまでの瞬時だけUPS間を流れる横流を低減することができる。 Also during normal operation of the UPS to no voltage drop due to the reactor to flow through the load current through the switch, and waits UPS to switch is faulty by reactor connected thyristor switches in series with the operating state only instant to switch to it are UPS can be reduced lateral flow through the inter-UPS. さらに開閉器の両側にサイリスタスイッチを並列に取付けることで各UPSを常用電源、予備電源という概念がなくなり、どちらのUPSで負荷に電力を供給中故障が発生したとしても、もう片側の健全なUPSにて負荷に確実に電力を供給することができる高信頼性無停電電源システムを提供できる。 Further switch sides customary each UPS by mounting the thyristor switch in parallel to the power, there is no concept of standby power, even in the feed fault power to a load in either UPS occurs, the other side healthy UPS it can provide reliably reliable uninterruptible power supply system can supply power to the load at.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の一実施例の主回路単線結線図。 [1] The main circuit line diagram of an embodiment of the present invention.

【図2】本発明の他の実施例の主回路単線結線図。 Main circuit line diagram of another embodiment of the present invention; FIG.

【図3】本発明のさらに他の実施例の主回路単線結線図。 [3] In addition the main circuit line diagram of another embodiment of the present invention.

【図4】本発明の別の実施例の主回路単線結線図。 Main circuit line diagram of another embodiment of the present invention; FIG.

【図5】従来の無停電電源システムの主回路単線結線図。 [5] The main circuit line diagram of a conventional UPS system.

【符号の説明】 DESCRIPTION OF SYMBOLS

1A〜1F…交流又は直流電源、2A〜2F…UPS、 1A~1F ... AC or DC power supply, 2A~2F ... UPS,
3A,3B…サイリスタスイッチ、4A,4B…リアクトル、5A〜5C…負荷、6…開閉器、7…同期検出回路、8A,8B…交流不足電圧検出回路、9A〜9C… 3A, 3B ... thyristor switch, 4A, 4B ... reactor, 5A-5C ... load, 6 ... switch, 7 ... synchronous detection circuit, 8A, 8B ... AC undervoltage detection circuit, 9A-C ...
保護回路、10A〜10F…交流遮断器、11…電流モニタ回路。 Protection circuit, 1OA - 1OF ... AC circuit breaker, 11 ... current monitor circuit.

Claims (2)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 単独運転可能な2台の無停電電源装置と、前記無停電電源装置と負荷との間に設けた開閉器と、前記開閉器の両側と前記負荷との間にそれぞれ並列接続されたサイリスタスイッチとリアクトルの直列回路とから構成される無停電電源システムにおいて、前記無停電電源装置の各々の出力不足電圧を検出する不足電圧検出回路と前記無停電電源装置の各々の出力間の同期状態を監視する同期検出回路とからなる検出回路と、給電中の前記無停電電源装置の出力電圧が低下したことを前記検出回路で検出した時、前記開閉器によって他方の健全な前記無停電電源装置に切り換える切換手段とを備えたことを特徴とする無停電電源システム。 And 1. A alone operable two uninterruptible power supplies, wherein the switch provided between the uninterruptible power supply and the load, respectively connected in parallel between the load and opposite sides of the switch in the uninterruptible power supply system composed of a series circuit of thyristors switch and the reactor, between the each of the respective output undervoltage of the UPS and the undervoltage detection circuit for detecting the uninterruptible power supply output a detection circuit comprising a synchronization detection circuit for monitoring the synchronization state, when the output voltage of the uninterruptible power supply in power is detected by the detection circuit that it has reduced, the other sound the uninterruptible by the switch uninterruptible power supply system is characterized in that a switching means for switching the power supply.
  2. 【請求項2】 多数の無停電電源装置をいくつかの群に割り振り群内部では並列冗長運転をし,群同士では互いに単独運転可能な無停電電源装置群と、前記無停電電源装置群と各負荷との間にそれぞれ接続された開閉器と、 Wherein the allocation groups inside a number of uninterruptible power supply into several groups to the parallel redundant operation, the isolated operation can uninterruptible power supply unit to each other in the group to each other, each of said uninterruptible power supply unit a switch which is connected between the load,
    前記開閉器の両側と前記各負荷との間にそれぞれ並列接続されたサイリスタスイッチとリアクトルの直列回路とから構成される無停電電源システムにおいて、前記無停電電源装置群の各々の出力不足電圧を検出する不足電圧検出回路と前記無停電電源装置の各々の出力間の同期状態を監視する同期検出回路とからなる検出回路を前記無停電電源装置群とは独立しかつ負荷数と同数備え、給電中の前記無停電電源装置群の出力電圧が低下したことを前記検出回路で検出した時,前記開閉器によって別の健全な前記無停電電源装置群に切り換える切換手段とを備えたことを特徴とする無停電電源システム。 In the uninterruptible power supply system composed of a series circuit of the thyristor switch and a reactor connected in parallel respectively between the respective load and on both sides of the switch, detecting the respective output undervoltage of the uninterruptible power supply unit with the same number as independent and the number of loads to the undervoltage detection circuit and the uninterruptible power supply respective output between the synchronization state the uninterruptible power supply unit detection circuit comprising a synchronization detecting circuit that monitors the the power supply during when the output voltage of the uninterruptible power supply unit is detected by the detection circuit that decreases the, characterized in that a switching means for switching to a different sound the uninterruptible power supply unit by the switch uninterruptible power supply system.
JP7090419A 1995-04-17 1995-04-17 Uninterruptible power supply Pending JPH08289485A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7090419A JPH08289485A (en) 1995-04-17 1995-04-17 Uninterruptible power supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7090419A JPH08289485A (en) 1995-04-17 1995-04-17 Uninterruptible power supply

Publications (1)

Publication Number Publication Date
JPH08289485A true JPH08289485A (en) 1996-11-01

Family

ID=13998086

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7090419A Pending JPH08289485A (en) 1995-04-17 1995-04-17 Uninterruptible power supply

Country Status (1)

Country Link
JP (1) JPH08289485A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003088000A (en) * 2001-09-17 2003-03-20 Toshiba Corp Power source changer
US7045914B2 (en) * 2002-10-09 2006-05-16 Hon Hai Precision Ind. Co., Ltd System and method for automatically providing continuous power supply via standby uninterrupted power supplies
JP2006254522A (en) * 2005-03-08 2006-09-21 Toshiba Mitsubishi-Electric Industrial System Corp System switching device
JP2011502462A (en) * 2007-10-31 2011-01-20 ケィティ、コーポレーションKt Corporation Selection switch device, power supply device using the same, and switching method thereof
JP2012005208A (en) * 2010-06-15 2012-01-05 Toshiba Mitsubishi-Electric Industrial System Corp Power switching device
WO2014016919A1 (en) * 2012-07-25 2014-01-30 東芝三菱電機産業システム株式会社 Power supply system
JP2014505457A (en) * 2011-01-12 2014-02-27 ザ・ボーイング・カンパニーThe Boeing Company Reconfigurable AC interface for smart microgrids
JP2014110725A (en) * 2012-12-04 2014-06-12 Toshiba Mitsubishi-Electric Industrial System Corp Power switching device
JP2014176247A (en) * 2013-03-12 2014-09-22 Toshiba Mitsubishi-Electric Industrial System Corp Uninterruptible power supply system
CN105553086A (en) * 2014-10-23 2016-05-04 通用电气公司 Protection methods and switches in uninterruptible power supply systems
EP2579425A4 (en) * 2010-05-25 2016-11-02 Hytera Comm Corp Ltd Smooth switching device and method for double power supplies

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003088000A (en) * 2001-09-17 2003-03-20 Toshiba Corp Power source changer
US7045914B2 (en) * 2002-10-09 2006-05-16 Hon Hai Precision Ind. Co., Ltd System and method for automatically providing continuous power supply via standby uninterrupted power supplies
JP2006254522A (en) * 2005-03-08 2006-09-21 Toshiba Mitsubishi-Electric Industrial System Corp System switching device
JP2011502462A (en) * 2007-10-31 2011-01-20 ケィティ、コーポレーションKt Corporation Selection switch device, power supply device using the same, and switching method thereof
US8772969B2 (en) 2007-10-31 2014-07-08 Kt Corporation Static transfer switch device, power supply apparatus using the switch device and switching method thereof
EP2579425A4 (en) * 2010-05-25 2016-11-02 Hytera Comm Corp Ltd Smooth switching device and method for double power supplies
JP2012005208A (en) * 2010-06-15 2012-01-05 Toshiba Mitsubishi-Electric Industrial System Corp Power switching device
JP2014505457A (en) * 2011-01-12 2014-02-27 ザ・ボーイング・カンパニーThe Boeing Company Reconfigurable AC interface for smart microgrids
WO2014016919A1 (en) * 2012-07-25 2014-01-30 東芝三菱電機産業システム株式会社 Power supply system
JPWO2014016919A1 (en) * 2012-07-25 2016-07-07 東芝三菱電機産業システム株式会社 Power system
US10263459B2 (en) 2012-07-25 2019-04-16 Toshiba Mitsubishi-Electric Industrial Systems Corporation Power supply system
CN104508942A (en) * 2012-07-25 2015-04-08 东芝三菱电机产业系统株式会社 Power supply system
JP2014110725A (en) * 2012-12-04 2014-06-12 Toshiba Mitsubishi-Electric Industrial System Corp Power switching device
JP2014176247A (en) * 2013-03-12 2014-09-22 Toshiba Mitsubishi-Electric Industrial System Corp Uninterruptible power supply system
CN105553086A (en) * 2014-10-23 2016-05-04 通用电气公司 Protection methods and switches in uninterruptible power supply systems
EP3012943A3 (en) * 2014-10-23 2016-05-04 General Electric Company Protection methods and switches in uninterruptible power supply systems
US10284007B2 (en) 2014-10-23 2019-05-07 Abb Schweiz Ag Protection methods and switches in uninterruptible power supply systems

Similar Documents

Publication Publication Date Title
CN1127792C (en) Power system
CN101060256B (en) Nested redundant uninterruptible power supply apparatus and methods
ES2258281T3 (en) Selective disconnection without threads of alternate power supply systems connected in parallel.
US7425779B2 (en) Parallel redundant power system and the control method for the same
JP5107872B2 (en) Method, apparatus and computer program for selecting redundant power supply mode for supplying power to a computer system
JP4159546B2 (en) A system that supplies reliable power to important loads
JP2004521802A (en) Electric load management center
US5386147A (en) Aerospace power control system for monitoring and reliably transferring power buses
US7816813B2 (en) Method and apparatus for parallel engine generators
US6465910B2 (en) System for providing assured power to a critical load
US20060138867A1 (en) Modular AC power supply system with fault bypass and method of switching output modes
US7129599B2 (en) Dual feed power supply systems with enhanced power quality
US5920129A (en) Uninterruptible power supply having solid state transfer switch and method of operation thereof
US6292379B1 (en) Distributed internal fault bypass in a modular uninterruptible power supply
US7265458B2 (en) Apparatus and methods for coordinated static switch operations for load transfers in uninterruptible power supply systems
JP3850350B2 (en) System and method for supplying power to an electrical device
CN1288818C (en) Method of parallel operation for uninterruptible power supply
US7723863B2 (en) Power systems and methods using an uniterruptible power supply to transition to generator-powered operation
USRE43177E1 (en) Apparatus and method for preventing an electrical backfeed
CN1848600B (en) Power supply arrangement
US4879624A (en) Power controller
US6747369B2 (en) Power system including redundant power supplies
KR101079900B1 (en) Static transfer switch device, power supply apparatus using the switch device and switching method thereof
KR20030020883A (en) Power system utilizing a dc bus
JPH082154B2 (en) Asynchronous multi-phase switching-circuit