JPH0956087A - Uninterrupticle power unit - Google Patents
Uninterrupticle power unitInfo
- Publication number
- JPH0956087A JPH0956087A JP7210328A JP21032895A JPH0956087A JP H0956087 A JPH0956087 A JP H0956087A JP 7210328 A JP7210328 A JP 7210328A JP 21032895 A JP21032895 A JP 21032895A JP H0956087 A JPH0956087 A JP H0956087A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- load
- semiconductor switch
- commercial power
- commercial
- 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.)
- Granted
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Stand-By Power Supply Arrangements (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】この発明は、商用電源の健全時
(以下においては単に通常時と呼ぶ)は商用電源より半
導体スイッチを介して負荷に給電を行い、商用電源の停
電時は蓄電池よりインバータを介して負荷に給電を行う
無停電電源装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supplies electric power to a load from a commercial power source through a semiconductor switch when the commercial power source is healthy (hereinafter referred to simply as "normal time"), and from a storage battery to an inverter when the commercial power source fails. The present invention relates to an uninterruptible power supply device that supplies power to a load via a power supply.
【0002】[0002]
【従来の技術】図4は、この種の無停電電源装置の従来
例を示す構成図である。図4において、1は商用電源、
2は蓄電池、3は負荷、10は無停電電源装置であり、
無停電電源装置10は回路遮断器11、半導体スイッチ
12、ゲート駆動回路13、電磁接触器14、平滑コン
デンサ15、インバータ主回路16、変圧器17、交流
リアクトル18、フィルタコンデンサ19、制限抵抗2
0、電磁接触器21,22、インバータ制御回路23に
よって構成されている。また、フィルタコンデンサ19
は、インバータ主回路16のスイッチング動作に伴って
発生するスイッチングノイズを除去するフィルタであ
る。2. Description of the Related Art FIG. 4 is a block diagram showing a conventional example of this type of uninterruptible power supply. In FIG. 4, 1 is a commercial power supply,
2 is a storage battery, 3 is a load, 10 is an uninterruptible power supply,
The uninterruptible power supply 10 includes a circuit breaker 11, a semiconductor switch 12, a gate drive circuit 13, an electromagnetic contactor 14, a smoothing capacitor 15, an inverter main circuit 16, a transformer 17, an AC reactor 18, a filter capacitor 19, and a limiting resistor 2.
0, electromagnetic contactors 21 and 22, and an inverter control circuit 23. In addition, the filter capacitor 19
Is a filter that removes switching noise that occurs with the switching operation of the inverter main circuit 16.
【0003】図4に示した無停電電源装置10は、次の
ように動作する。まず、通常時の起動は、回路遮断器1
1を閉路させ、ゲート駆動回路13により半導体スイッ
チ12を導通させて、商用電源1から回路遮断器11,
半導体スイッチ12を介して負荷3に給電を開始すると
ともに、電磁接触器14,21を閉路させて、インバー
タ主回路16を経由して平滑コンデンサ15および蓄電
池2に流れる突入電流を制限抵抗20により抑制し、そ
の後、電磁接触器22を閉路させて、インバータ制御回
路23によりインバータ主回路16は蓄電池2への充電
動作を開始し、負荷3から発生する高調波電流や無効電
流を吸収するアクティブフィルタ動作を開始することで
起動が完了し、無停電電源装置10は通常状態になる。The uninterruptible power supply 10 shown in FIG. 4 operates as follows. First, the circuit board breaker 1
1 is closed, and the semiconductor switch 12 is made conductive by the gate drive circuit 13 to turn off the circuit breaker 11 from the commercial power source 1.
The power supply to the load 3 is started via the semiconductor switch 12, the electromagnetic contactors 14 and 21 are closed, and the rush current flowing through the smoothing capacitor 15 and the storage battery 2 via the inverter main circuit 16 is suppressed by the limiting resistor 20. After that, the electromagnetic contactor 22 is closed, and the inverter control circuit 23 causes the inverter main circuit 16 to start the charging operation for the storage battery 2 and the active filter operation for absorbing the harmonic current and the reactive current generated from the load 3. The start-up is completed by starting the, and the uninterruptible power supply 10 enters the normal state.
【0004】ここで、前記アクティブフィルタ動作とし
て、電流検出器24により検出される負荷3の電流に基
づいて調整されたインバータ制御回路23の出力のゲー
ト信号によって、交流リアクトル18を介したインバー
タ主回路16の出力交流電圧が制御される。次に、商用
電源1の停電時には、図示しない停電検出回路がこれを
検知して、ゲート駆動回路13により半導体スイッチ1
2を遮断し、インバータ制御回路23により蓄電池2か
ら電磁接触器14,平滑コンデンサ15,インバータ主
回路16,変圧器17,交流リアクトル18,フィルタ
コンデンサ19,電磁接触器23を介して負荷3に給電
する。Here, as the active filter operation, the inverter main circuit via the AC reactor 18 is controlled by the gate signal of the output of the inverter control circuit 23 adjusted based on the current of the load 3 detected by the current detector 24. The 16 output AC voltages are controlled. Next, at the time of power failure of the commercial power source 1, a power failure detection circuit (not shown) detects this and the gate drive circuit 13 causes the semiconductor switch 1 to operate.
2, the inverter control circuit 23 supplies power to the load 3 from the storage battery 2 via the electromagnetic contactor 14, the smoothing capacitor 15, the inverter main circuit 16, the transformer 17, the AC reactor 18, the filter capacitor 19, and the electromagnetic contactor 23. To do.
【0005】[0005]
【発明が解決しようとする課題】上記従来の無停電電源
装置によると、起動時にインバータ側に半導体スイッチ
を介して流れる過大な前述の突入電流を抑制するために
制限抵抗と2個の電磁接触器とからなる突入電流抑制機
能を必要とし、また、突入電流が流れる負荷が無停電電
源装置に接続されることを想定して、過電流耐量の大き
い半導体スイッチを選定していたので装置が大型にな
り、価格的にも問題があった。According to the above-mentioned conventional uninterruptible power supply, a limiting resistor and two electromagnetic contactors are provided to suppress the excessive inrush current flowing through the semiconductor switch to the inverter side at the time of startup. In addition, a semiconductor switch with a large overcurrent withstand capability was selected on the assumption that the load that inrush current flows would be connected to the uninterruptible power supply. There was also a problem in terms of price.
【0006】さらに、半導体スイッチに失弧が発生した
とき、従来は半導体スイッチの負荷側に電圧継電器を備
えて、これを検知するようにしていたが、電圧継電器の
検出遅れのため無停電電源装置としての機能を阻害する
恐れもあった。この発明の目的は、上記問題点を解決す
る無停電電源装置を提供することにある。Further, when the semiconductor switch is ignited, a voltage relay is conventionally provided on the load side of the semiconductor switch to detect it. However, the uninterruptible power supply system due to the delay in detection of the voltage relay. There was also a risk of hindering his function. An object of the present invention is to provide an uninterruptible power supply device that solves the above problems.
【0007】[0007]
【課題を解決するための手段】商用電源の健全時は、商
用電源より電力の供給/遮断を行う半導体スイッチを介
して負荷に給電を行うとともに、インバータにより商用
電源から蓄電池への充電動作と、負荷から発生する高調
波電流や無効電流を吸収するアクティブフィルタ動作と
を行わせ、商用電源の停電時は、蓄電池よりインバータ
を介して負荷に給電を行う無停電電源装置において、こ
の第1の発明は、前記半導体スイッチを商用電源の各相
それぞれに備えるサイリスタの逆並列回路から構成し、
前記無停電電源装置の起動時から所定の期間は、それぞ
れの前記サイリスタの導通角を所望の値に調整するゲー
ト駆動回路を備える。[Means for Solving the Problems] When the commercial power source is healthy, power is supplied to the load through a semiconductor switch that supplies / shuts off the power from the commercial power source, and the inverter operates to charge the storage battery from the commercial power source. In an uninterruptible power supply device that performs an active filter operation that absorbs a harmonic current and a reactive current generated from a load and supplies power to the load from a storage battery via an inverter during a power failure of the commercial power supply. Consists of an antiparallel circuit of a thyristor provided with the semiconductor switch for each phase of the commercial power supply,
A gate drive circuit that adjusts the conduction angle of each of the thyristors to a desired value is provided for a predetermined period from the start of the uninterruptible power supply.
【0008】第2の発明は、前記無停電電源装置におい
て、前記半導体スイッチを商用電源の各相それぞれに備
えるサイリスタの逆並列回路から構成し、前記負荷に流
れる電流が所定の値を越えたときには、それぞれの前記
サイリスタの導通角を所望の値に調整するゲート駆動回
路を備える。第3の発明は、前記無停電電源装置におい
て、前記半導体スイッチと並列に接続されたバイパスコ
ンタクタと、前記負荷に流れる電流が所定の値を越えた
ときには、前記バイパスコンタクタを投入するコンタク
タ制御回路とを備える。According to a second aspect of the present invention, in the uninterruptible power supply device, the semiconductor switch is composed of an antiparallel circuit of thyristors provided in each phase of the commercial power supply, and when the current flowing through the load exceeds a predetermined value. , A gate drive circuit for adjusting the conduction angle of each of the thyristors to a desired value. A third invention is, in the uninterruptible power supply, a bypass contactor connected in parallel with the semiconductor switch, and a contactor control circuit for turning on the bypass contactor when a current flowing through the load exceeds a predetermined value. Equipped with.
【0009】第4の発明は、前記無停電電源装置におい
て、半導体スイッチを商用電源の各相それぞれに備える
サイリスタの逆並列回路から構成し、前記半導体スイッ
チと並列に接続されたバイパスコンタクタと、前記半導
体スイッチの商用電源側の各相の線間電圧と該半導体ス
イッチの負荷側の各相の線間電圧とのそれぞれの相の偏
差を求め、この偏差が所定の値を越えたことを検知する
失弧検出回路と、該失弧検出回路が動作した時に、前記
半導体スイッチを遮断し、所定の期間は蓄電池よりイン
バータを介して負荷に給電を行い、該所定の期間に達し
たら前記バイパスコンタクタを投入する失弧制御回路と
を備える。According to a fourth aspect of the present invention, in the uninterruptible power supply system, a semiconductor switch is formed of an anti-parallel circuit of thyristors for each phase of a commercial power source, and a bypass contactor connected in parallel with the semiconductor switch, The deviation of each phase between the line voltage of each phase on the commercial power supply side of the semiconductor switch and the line voltage of each phase on the load side of the semiconductor switch is obtained, and it is detected that this deviation exceeds a predetermined value. An arcing detection circuit and when the arcing detection circuit operates, the semiconductor switch is cut off, power is supplied from a storage battery to a load through an inverter for a predetermined period, and when the predetermined period is reached, the bypass contactor is activated. And an arc-extinguishing control circuit.
【0010】さらに、第5の発明は、前記第3または第
4の発明において、前記バイパスコンタクタが投入期間
中は、前記アクティブフィルタ動作を停止させる動作制
御回路を備える。Further, a fifth invention is the third or fourth invention, further comprising an operation control circuit for stopping the active filter operation during the closing period of the bypass contactor.
【0011】[0011]
【作用】この第1の発明によれば、半導体スイッチを商
用電源の各相それぞれに備えるサイリスタの逆並列回路
から構成し、無停電電源装置の起動時から所定の期間
は、それぞれの前記サイリスタの導通角を所望の値に調
整することにより、起動時にインバータ側に半導体スイ
ッチを介して流れる過大な前述の突入電流を抑制するこ
とができる。According to the first aspect of the present invention, the semiconductor switch is formed by the antiparallel circuit of the thyristor provided for each phase of the commercial power source, and each of the thyristors is operated for a predetermined period from the start of the uninterruptible power supply. By adjusting the conduction angle to a desired value, it is possible to suppress the excessive inrush current that flows through the semiconductor switch to the inverter side at startup.
【0012】第2の発明によれば、半導体スイッチを商
用電源の各相それぞれに備えるサイリスタの逆並列回路
から構成し、負荷に流れる電流が所定の値を越えたとき
には、それぞれの前記サイリスタの導通角を所望の値に
調整することにより、突入電流が流れる負荷が無停電電
源装置に接続されたときにも、この突入電流を抑制する
ことができる。According to the second aspect of the present invention, the semiconductor switch is composed of an anti-parallel circuit of thyristors provided for each phase of the commercial power source, and when the current flowing through the load exceeds a predetermined value, the thyristors are turned on. By adjusting the angle to a desired value, it is possible to suppress the inrush current even when the load through which the inrush current flows is connected to the uninterruptible power supply.
【0013】第3の発明によれば、負荷に流れる電流が
所定の値を越えたときには、バイパスコンタクタを投入
することにより、突入電流が流れる負荷が無停電電源装
置に接続されたときにも、半導体スイッチが過電流にな
ることが回避される。第4の発明によれば、半導体スイ
ッチを商用電源の各相それぞれに備えるサイリスタの逆
並列回路から構成し、前記半導体スイッチと並列に接続
されたバイパスコンタクタと、前記半導体スイッチの商
用電源側の各相の線間電圧と該半導体スイッチの負荷側
の各相の線間電圧とのそれぞれの相の偏差を求め、この
偏差が所定の値を越えたことを検知する失弧検出回路
と、該失弧検出回路が動作した時に、前記半導体スイッ
チを遮断し、所定の期間は蓄電池よりインバータを介し
て負荷に給電を行い、該所定の期間に達したら前記バイ
パスコンタクタを投入することにより、前記半導体スイ
ッチの失弧による無停電電源装置としての機能が維持さ
れる。According to the third aspect of the present invention, when the current flowing through the load exceeds a predetermined value, the bypass contactor is turned on so that even when the load carrying the rush current is connected to the uninterruptible power supply, Overcurrent in the semiconductor switch is avoided. According to the fourth invention, a semiconductor switch is formed of an anti-parallel circuit of a thyristor provided for each phase of the commercial power supply, and a bypass contactor connected in parallel with the semiconductor switch and each of the semiconductor switch on the commercial power supply side. An arcing detection circuit that detects the deviation of each phase between the phase line voltage and the line voltage of each phase on the load side of the semiconductor switch, and detects that this deviation exceeds a predetermined value; When the arc detection circuit operates, the semiconductor switch is shut off, the load is supplied from the storage battery through the inverter for a predetermined period, and when the predetermined period is reached, the bypass contactor is turned on to turn on the semiconductor switch. The function of the UPS as an uninterruptible power supply is maintained.
【0014】さらに、第5の発明は、前記第3または第
4の発明において、バイパスコンタクタが投入期間中
は、前記アクティブフィルタ動作を停止させることで、
インバータ側から商用電源に流れる潮流が抑制され、こ
の潮流としての過電流でインバータが破損するのを防止
する。A fifth aspect of the present invention is that in the third or fourth aspect of the invention, the active filter operation is stopped during the closing period of the bypass contactor.
The power flow flowing from the inverter to the commercial power supply is suppressed, and the inverter is prevented from being damaged by the overcurrent as the power flow.
【0015】[0015]
【実施例】以下に記載するこの発明の実施例において、
図4に示した従来例と同一機能を有するものには同一符
号を付してその説明を省略し、図4と異なる機能を中心
に説明する。図1は、この発明の第1の実施例を示す無
停電電源装置の構成図である。EXAMPLES In the examples of the present invention described below,
Those having the same functions as those of the conventional example shown in FIG. 4 are designated by the same reference numerals, and the description thereof will be omitted. The functions different from those of FIG. 4 will be mainly described. FIG. 1 is a configuration diagram of an uninterruptible power supply device showing a first embodiment of the present invention.
【0016】図1に示す無停電電源装置30では、半導
体スイッチ31を商用電源1の各相それぞれに備えるサ
イリスタの逆並列回路から構成し、電流検出器24の出
力信号と図示しない無停電電源装置30の起動信号とが
入力されたゲート駆動回路32により、無停電電源装置
30の起動時、または負荷3の電流が定格電流を越えよ
うとしたとき、公知の技術によりサイリスタの点弧位相
を調整したゲート信号を発生させて、半導体スイッチ3
1が過電流になるのを防止する。In the uninterruptible power supply 30 shown in FIG. 1, a semiconductor switch 31 is composed of an antiparallel circuit of thyristors provided for each phase of the commercial power supply 1, and the output signal of the current detector 24 and the uninterruptible power supply not shown. When the start signal of the thyristor 30 is input to the gate drive circuit 32, the ignition phase of the thyristor is adjusted by a known technique when the uninterruptible power supply 30 is started or when the current of the load 3 is about to exceed the rated current. Generated gate signal to generate the semiconductor switch 3
1 prevents overcurrent.
【0017】なお、図1において、回路遮断器25は通
常は閉路され、インバータ主回路16の短絡故障時の商
用電源1から半導体スイッチ31を介して該インバータ
主回路16に流れ込む過電流保護動作を行い、無停電電
源装置30の例えば保守点検時には開路をするものであ
る。図2は、この発明の第2の実施例を示す無停電電源
装置の構成図である。In FIG. 1, the circuit breaker 25 is normally closed, and an overcurrent protection operation that flows into the inverter main circuit 16 from the commercial power source 1 via the semiconductor switch 31 when the inverter main circuit 16 has a short circuit failure is performed. The uninterruptible power supply 30 is opened at the time of maintenance and inspection, for example. FIG. 2 is a configuration diagram of an uninterruptible power supply device showing a second embodiment of the present invention.
【0018】図2に示す無停電電源装置40では、半導
体スイッチ31を商用電源1各相それぞれに備えるサイ
リスタの逆並列回路から構成し、半導体スイッチ31と
並列に接続されたバイパスコンタクタ41と、半導体ス
イッチ31の商用電源1側の各相の線間電圧を検出する
変圧器42aの検出値と半導体スイッチ31の負荷3側
の各相の線間電圧を検出する変圧器42bの検出値との
それぞれの相の偏差を加算演算器42cで求め、この偏
差が所定の値(図2の42dにより例えば2ボルト程
度))を越えたことをコンパレータ42eで検知する失
弧検出回路42と、失弧検出回路42が動作した時に、
半導体スイッチ31をゲート駆動回路43を介して遮断
し、所定の期間(例えば5秒程度)は蓄電池1よりイン
バータ主回路16を介して負荷3に給電をするようにイ
ンバータ制御回路44が動作をし、該所定の期間に達し
たら前述のインバータ主回路16よりの給電を停止し、
バイパスコンタクタ41を投入する失弧制御回路45と
を備えている。In the uninterruptible power supply 40 shown in FIG. 2, the semiconductor switch 31 is composed of an anti-parallel circuit of a thyristor provided for each phase of the commercial power supply 1, and a bypass contactor 41 connected in parallel with the semiconductor switch 31 and a semiconductor. Each of the detected value of the transformer 42a that detects the line voltage of each phase on the commercial power supply 1 side of the switch 31 and the detected value of the transformer 42b that detects the line voltage of each phase on the load 3 side of the semiconductor switch 31. The arc deviation detection circuit 42 that detects the deviation of the phase of the above with the addition calculator 42c, and detects with the comparator 42e that this deviation exceeds a predetermined value (for example, about 2 volts by 42d in FIG. 2), and the arc detection. When the circuit 42 operates,
The semiconductor switch 31 is cut off via the gate drive circuit 43, and the inverter control circuit 44 operates so that power is supplied from the storage battery 1 to the load 3 via the inverter main circuit 16 for a predetermined period (for example, about 5 seconds). When the predetermined period is reached, the power supply from the inverter main circuit 16 is stopped,
An arc-extinguishing control circuit 45 for turning on the bypass contactor 41 is provided.
【0019】さらに、図2において、無停電電源装置4
0はバイパスコンタクタ41が閉路されたときには、前
述の第5の発明の作用に対応すべく前記アクティブフィ
ルタ動作を停止するものとする。図3は、この発明の第
3の実施例を示す無停電電源装置の構成図である。図3
に示す無停電電源装置50では、電流検出器24の出力
信号から負荷3に流れる電流が定格電流を越えようとし
たときに、コンタクタ制御回路51が動作して、バイパ
スコンタクタ41が閉路し、この電流がバイパスコンタ
クタ41に流れることで半導体スイッチ31が過電流で
破損することが防止される。Further, in FIG. 2, the uninterruptible power supply 4
In the case of 0, when the bypass contactor 41 is closed, the active filter operation is stopped in order to correspond to the operation of the fifth invention. FIG. 3 is a configuration diagram of an uninterruptible power supply device showing a third embodiment of the present invention. FIG.
In the uninterruptible power supply device 50 shown in FIG. 3, when the current flowing through the load 3 from the output signal of the current detector 24 is about to exceed the rated current, the contactor control circuit 51 operates and the bypass contactor 41 closes. The current flowing through the bypass contactor 41 prevents the semiconductor switch 31 from being damaged by an overcurrent.
【0020】さらに、図3において、無停電電源装置5
0はバイパスコンタクタ41が閉路されたときには、前
述の第5の発明の作用に対応すべく前記アクティブフィ
ルタ動作を停止するものとする。Further, in FIG. 3, the uninterruptible power supply 5
In the case of 0, when the bypass contactor 41 is closed, the active filter operation is stopped in order to correspond to the operation of the fifth invention.
【0021】[0021]
【発明の効果】この発明によれば、半導体スイッチに過
大な電流が流れようとしたときに、半導体スイッチを構
成するサイリスタの点弧位相を調整する、またはバイパ
スコンタクタを閉路することにより半導体スイッチが過
電流で破損することが防止されるので、半導体スイッチ
が小型になり、装置の低価格化に寄与する。According to the present invention, when an excessive current is about to flow through the semiconductor switch, the semiconductor switch can be operated by adjusting the firing phase of the thyristor constituting the semiconductor switch or by closing the bypass contactor. Since damage due to overcurrent is prevented, the semiconductor switch becomes smaller, which contributes to lowering the cost of the device.
【0022】さらに、半導体スイッチに失弧が発生した
とき、これを速やかに検知する失弧検出回路を提供でき
たので、無停電電源装置としての信頼性を向上させる。Further, since it is possible to provide an arcing detection circuit for promptly detecting an arcing of the semiconductor switch, the reliability of the uninterruptible power supply is improved.
【図1】この発明の第1の実施例を示す無停電電源装置
の構成図FIG. 1 is a configuration diagram of an uninterruptible power supply device showing a first embodiment of the present invention.
【図2】この発明の第2の実施例を示す無停電電源装置
の構成図FIG. 2 is a configuration diagram of an uninterruptible power supply device showing a second embodiment of the present invention.
【図3】この発明の第3の実施例を示す無停電電源装置
の構成図FIG. 3 is a block diagram of an uninterruptible power supply showing a third embodiment of the present invention.
【図4】従来例を示す無停電電源装置の構成図FIG. 4 is a configuration diagram of an uninterruptible power supply device showing a conventional example.
1…商用電源、2…蓄電池、3…負荷、10,30,4
0,50…無停電電源装置、11…回路遮断器、12,
31…半導体スイッチ、13,32,43…ゲート駆動
回路、14,21,22…電磁接触器、15…平滑コン
デンサ、16…インバータ主回路、17…変圧器、18
…交流リアクトル、19…フィルタコンデンサ、20…
制限抵抗、23,44…インバータ制御回路、24…電
流検出器、41…バイパスコンタクタ、42…失弧検出
回路、45…失弧制御回路、51…コンタクタ制御回
路。1 ... Commercial power supply, 2 ... Storage battery, 3 ... Load, 10, 30, 4
0, 50 ... Uninterruptible power supply, 11 ... Circuit breaker, 12,
31 ... Semiconductor switch, 13, 32, 43 ... Gate drive circuit, 14, 21, 22 ... Electromagnetic contactor, 15 ... Smoothing capacitor, 16 ... Inverter main circuit, 17 ... Transformer, 18
... AC reactor, 19 ... Filter capacitor, 20 ...
Limiting resistors, 23, 44 ... Inverter control circuit, 24 ... Current detector, 41 ... Bypass contactor, 42 ... Arcing detection circuit, 45 ... Arcing control circuit, 51 ... Contactor control circuit.
Claims (5)
供給/遮断を行う半導体スイッチを介して負荷に給電を
行うとともに、インバータにより商用電源から蓄電池へ
の充電動作と、負荷から発生する高調波電流や無効電流
を吸収するアクティブフィルタ動作とを行わせ、商用電
源の停電時は、蓄電池よりインバータを介して負荷に給
電を行う無停電電源装置において、 前記半導体スイッチを商用電源の各相それぞれに備える
サイリスタの逆並列回路から構成し、 前記無停電電源装置の起動時から所定の期間は、それぞ
れの前記サイリスタの導通角を所望の値に調整するゲー
ト駆動回路を備えたことを特徴とする無停電電源装置。1. When the commercial power source is healthy, power is supplied to the load through a semiconductor switch that supplies / shuts off the power from the commercial power source, and the inverter operates to charge the commercial battery from the commercial power source and generate the load. In an uninterruptible power supply device that performs active filter operation that absorbs harmonic currents and reactive currents, and when the commercial power supply fails, power is supplied from the storage battery to the load through the inverter. It is composed of an anti-parallel circuit of thyristors provided in each, for a predetermined period from the start of the uninterruptible power supply, a gate drive circuit for adjusting the conduction angle of each thyristor to a desired value, characterized by Uninterruptible power supply that does.
供給/遮断を行う半導体スイッチを介して負荷に給電を
行うとともに、インバータにより商用電源から蓄電池へ
の充電動作と、負荷から発生する高調波電流や無効電流
を吸収するアクティブフィルタ動作とを行わせ、商用電
源の停電時は、蓄電池よりインバータを介して負荷に給
電を行う無停電電源装置において、 前記半導体スイッチを商用電源の各相それぞれに備える
サイリスタの逆並列回路から構成し、 前記負荷に流れる電流が所定の値を越えたときには、そ
れぞれの前記サイリスタの導通角を所望の値に調整する
ゲート駆動回路を備えたことを特徴とする無停電電源装
置。2. When the commercial power source is healthy, power is supplied to the load through a semiconductor switch that supplies / shuts off the power from the commercial power source, and the inverter operates to charge the commercial battery from the commercial power source and generate the load. In an uninterruptible power supply device that performs active filter operation that absorbs harmonic currents and reactive currents, and when the commercial power supply fails, power is supplied from the storage battery to the load through the inverter. And a gate drive circuit for adjusting the conduction angle of each thyristor to a desired value when the current flowing through the load exceeds a predetermined value. Uninterruptible power supply that does.
供給/遮断を行う半導体スイッチを介して負荷に給電を
行うとともに、インバータにより商用電源から蓄電池へ
の充電動作と、負荷から発生する高調波電流や無効電流
を吸収するアクティブフィルタ動作とを行わせ、商用電
源の停電時は、蓄電池よりインバータを介して負荷に給
電を行う無停電電源装置において、 前記半導体スイッチと並列に接続されたバイパスコンタ
クタと、 前記負荷に流れる電流が所定の値を越えたときには、前
記バイパスコンタクタを投入するコンタクタ制御回路と
を備えたことを特徴とする無停電電源装置。3. When the commercial power source is healthy, power is supplied to the load through a semiconductor switch that supplies / shuts off the power from the commercial power source, and the inverter operates to charge the storage battery from the commercial power source and generate from the load. In an uninterruptible power supply device that performs active filter operation that absorbs harmonic currents and reactive currents, and supplies power to the load from the storage battery via the inverter during a power failure of the commercial power supply, connected in parallel with the semiconductor switch. An uninterruptible power supply comprising: a bypass contactor; and a contactor control circuit that turns on the bypass contactor when a current flowing through the load exceeds a predetermined value.
供給/遮断を行う半導体スイッチを介して負荷に給電を
行うとともに、インバータにより商用電源から蓄電池へ
の充電動作と、負荷から発生する高調波電流や無効電流
を吸収するアクティブフィルタ動作とを行わせ、商用電
源の停電時は、蓄電池よりインバータを介して負荷に給
電を行う無停電電源装置において、 半導体スイッチを商用電源の各相それぞれに備えるサイ
リスタの逆並列回路から構成し、 前記半導体スイッチと並列に接続されたバイパスコンタ
クタと、 前記半導体スイッチの商用電源側の各相の線間電圧と該
半導体スイッチの負荷側の各相の線間電圧とのそれぞれ
の相の偏差を求め、この偏差が所定の値を越えたことを
検知する失弧検出回路と、 該失弧検出回路が動作した時に、前記半導体スイッチを
遮断し、所定の期間は蓄電池よりインバータを介して負
荷に給電を行い、該所定の期間に達したら前記バイパス
コンタクタを投入する失弧制御回路とを備えたことを特
徴とする無停電電源装置。4. When the commercial power source is healthy, power is supplied to the load through a semiconductor switch that supplies / shuts off the power from the commercial power source, and the inverter operates to charge the commercial battery from the commercial power source and generate from the load. In an uninterruptible power supply system that performs active filter operation that absorbs harmonic currents and reactive currents, and supplies power to the load from the storage battery via the inverter during a power failure of the commercial power supply, use a semiconductor switch for each phase of the commercial power supply. A bypass contactor connected in parallel with the semiconductor switch, a line voltage of each phase on the commercial power source side of the semiconductor switch, and a line of each phase on the load side of the semiconductor switch. An arc-extinguishing detection circuit that detects the deviation of each phase from the inter-voltage and detects that this deviation exceeds a predetermined value, and the arc-existing detection circuit operates. When this occurs, the semiconductor switch is cut off, power is supplied to the load from the storage battery through the inverter for a predetermined period, and the arc-extinguishing control circuit is turned on to turn on the bypass contactor when the predetermined period is reached. And an uninterruptible power supply.
装置において、 前記バイパスコンタクタが投入期間中は、前記アクティ
ブフィルタ動作を停止させる動作制御回路を備えたこと
を特徴とする無停電電源装置。5. The uninterruptible power supply according to claim 3 or 4, further comprising an operation control circuit for stopping the active filter operation during a closing period of the bypass contactor. Power supply.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21032895A JP3428242B2 (en) | 1995-08-18 | 1995-08-18 | Uninterruptible power system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21032895A JP3428242B2 (en) | 1995-08-18 | 1995-08-18 | Uninterruptible power system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0956087A true JPH0956087A (en) | 1997-02-25 |
JP3428242B2 JP3428242B2 (en) | 2003-07-22 |
Family
ID=16587608
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21032895A Expired - Lifetime JP3428242B2 (en) | 1995-08-18 | 1995-08-18 | Uninterruptible power system |
Country Status (1)
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JP (1) | JP3428242B2 (en) |
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US6445089B1 (en) | 2000-09-22 | 2002-09-03 | Sanyo Denki Co. Ltd. | Uninterruptible power system |
JP2011250649A (en) * | 2010-05-31 | 2011-12-08 | Shimizu Corp | Electric power system |
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JP2000354985A (en) * | 1999-06-11 | 2000-12-26 | Denso Corp | Locomotive robot |
US6445089B1 (en) | 2000-09-22 | 2002-09-03 | Sanyo Denki Co. Ltd. | Uninterruptible power system |
JP2011250649A (en) * | 2010-05-31 | 2011-12-08 | Shimizu Corp | Electric power system |
JP2011250650A (en) * | 2010-05-31 | 2011-12-08 | Shimizu Corp | Electric power system |
US8860247B2 (en) | 2010-05-31 | 2014-10-14 | Shimizu Corporation | Electric power system and uninterruptible power supply for important load |
JP2012186972A (en) * | 2011-03-08 | 2012-09-27 | Toshiba Mitsubishi-Electric Industrial System Corp | Uninterruptible power supply |
JP2012239249A (en) * | 2011-05-10 | 2012-12-06 | Toshiba Mitsubishi-Electric Industrial System Corp | Uninterruptible power supply system |
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