JP2776559B2 - Inrush current supply circuit - Google Patents
Inrush current supply circuitInfo
- Publication number
- JP2776559B2 JP2776559B2 JP1118245A JP11824589A JP2776559B2 JP 2776559 B2 JP2776559 B2 JP 2776559B2 JP 1118245 A JP1118245 A JP 1118245A JP 11824589 A JP11824589 A JP 11824589A JP 2776559 B2 JP2776559 B2 JP 2776559B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- inverter
- semiconductor switch
- switch
- power supply
- 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.)
- Expired - Lifetime
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/248—UPS systems or standby or emergency generators
Landscapes
- Stand-By Power Supply Arrangements (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は常時インバータ給電方式の交流無停電電源装
置（以下、UPSと言う。）において、負荷の並入に伴っ
て発生する突入電流を供給することのできるUPSに付帯
する突入電流供給回路に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is to supply an inrush current generated with a load in an AC uninterruptible power supply (hereinafter referred to as UPS) of a constant inverter power supply system. The present invention relates to a rush current supply circuit attached to a UPS that can perform the operation.
コンピュータ応用機器の普及拡大およびコンピュータ
・システムのネットワーク化に伴い、UPSの負荷として
はコンデンサ・インプット形負荷が多くなっている。With the spread of computer application equipment and the networking of computer systems, capacitor input type loads have increased as UPS loads.
このコンデンサ・インプット形負荷を並入始動させる
とピーク値の大きい突入電流が流れるので、従来のバイ
パス回路付きUPSにおいては、インバータの過電流保護
のために負荷をバイパス回路側へ切り換えていた。When the capacitor-input type loads are started in parallel, an inrush current having a large peak value flows. Therefore, in a conventional UPS with a bypass circuit, the load is switched to the bypass circuit side to protect the inverter from overcurrent.
前述のように、インバータからバイパス回路へ切り換
えられた突入電流はバイパス回路を介して商用交流電源
（以下、直送電源という。）から供給されることにな
る。As described above, the rush current switched from the inverter to the bypass circuit is supplied from the commercial AC power supply (hereinafter, referred to as a direct power supply) via the bypass circuit.
この結果、直送電源系に電圧変動を生じ、接続されて
いる他の機器への供給電圧降下やノイズ増加等の障害を
与えていた。As a result, voltage fluctuations occur in the direct power supply system, causing problems such as a drop in supply voltage to other connected equipment and an increase in noise.
本発明は、前述した課題を解決するために、コンデン
サ・インプット形負荷を並入始動させる時に発生するピ
ーク値の大きい突入電流を供給する回路を設けることに
よって、直送電源から突入電流を供給するために発生す
る直送電源系の障害を防ぐことを目的とするものであ
る。In order to solve the above-mentioned problems, the present invention provides a circuit for supplying an inrush current having a large peak value generated when a capacitor-input type load is started in parallel. The purpose of the present invention is to prevent a failure of the direct power supply system that occurs in the system.
前記の目的を達成するために、本発明は、出力回路に
スイッチを備えたインバータおよび並列接続したスイッ
チを備えたバイパス回路等によって構成した常時インバ
ータ給電方式の交流無停電電源装置であって、上記バイ
パス回路の２つの入力端子とインバータの２つの出力回
路端子との間にそれぞれ挿入したダイオードとサイリス
タを並列接続した半導体スイッチより成る回路、並び
に、上記半導体スイッチとリアクタを直列接続した回路
と、１次側は上記２組の半導体スイッチの入力側に並列
接続し、２次側の両端子はそれぞれダイオードを介して
コンデンサのプラス側に接続すると共に、２次側中間タ
ップに抵抗を設け、それぞれダイオードを介して上記２
組のコンデンサのマイナス側に接続したトランスと、上
記２組のコンデンサのプラス側をそれぞれサイリスタを
介して上記半導体スイッチの出力側に接続し、同じくマ
イナス側をそれぞれ反対側の半導体スイッチの出力側に
接続した２組の並列回路と、さらに、上記インバータの
出力回路の一線に設けた過電流検出器によってピーク電
流を検出し、この検出信号をうけて上記コンデンサのプ
ラス側端子に接続した２組のサイリスタおよび上記半導
体スイッチを構成する２組のサイリスタを選択点孤させ
る２組のゲート回路を備えたコントロール回路と、によ
って構成した交流無停電電源装置の突入電流供給回路で
ある。In order to achieve the above object, the present invention relates to an AC uninterruptible power supply of a constant inverter power supply type configured by an inverter having a switch in an output circuit and a bypass circuit having a switch connected in parallel, and the like. A circuit comprising a semiconductor switch in which a diode and a thyristor inserted between two input terminals of a bypass circuit and two output circuit terminals of an inverter are connected in parallel, a circuit in which the semiconductor switch and a reactor are connected in series, The secondary side is connected in parallel to the input side of the above-mentioned two sets of semiconductor switches. Both terminals of the secondary side are connected to the plus side of the capacitor via diodes, respectively, and a resistor is provided at the secondary side intermediate tap. Through the above 2
The transformer connected to the negative side of the set of capacitors and the positive side of the two sets of capacitors are connected to the output side of the semiconductor switch via a thyristor, respectively, and the negative side is connected to the output side of the opposite semiconductor switch. A peak current is detected by two sets of connected parallel circuits and an overcurrent detector provided on a line of the output circuit of the inverter, and two sets of two sets connected to the positive terminal of the capacitor in response to the detection signal. A rush current supply circuit for an AC uninterruptible power supply comprising a thyristor and a control circuit including two sets of gate circuits for selecting and turning on two sets of thyristors constituting the semiconductor switch.
常時インバータから一般負荷へ交流電力を供給してい
る場合には、直送電源に並列接続されているトランスに
より、前記トランスの２次側にダイオードを介して接続
されている２個のコンデンサは充電される。When AC power is constantly supplied from the inverter to the general load, the two capacitors connected via diodes to the secondary side of the transformer are charged by the transformer connected in parallel to the direct power supply. You.
コンデンサ・インプット形負荷がUPSの負荷として投
入されると、前記負荷内部にあるコンデンサを充電する
ためにピーク値の大きい突入電流が流れる。When a capacitor-input type load is applied as a load of the UPS, an inrush current having a large peak value flows to charge a capacitor inside the load.
インバータの出力回路に設けられた過電流検出器の作
動によってインバータは瞬時にロックされると共にコン
トロール回路は点弧信号をゲート回路へ送り、サイリス
タをONさせる。サイリスタのONによってコンデンサに充
電されていた電荷は放電されピーク電流を供給する。The inverter is instantly locked by the operation of the overcurrent detector provided in the output circuit of the inverter, and the control circuit sends a firing signal to the gate circuit to turn on the thyristor. When the thyristor is turned on, the charge stored in the capacitor is discharged to supply a peak current.
以下に、本発明に係る突入電流供給回路の一実施例を
第１図に基づいて説明する。An embodiment of the inrush current supply circuit according to the present invention will be described below with reference to FIG.
UPSはスイッチ２を備えたインバータ１およびスイッ
チ４を備えたバイパス回路３等によって構成されてお
り、また本発明に係る突入電流供給回路はUPSの商用交
流電源の入口端子Ｕ、Ｖと負荷への出力端子U0、V0との
間に挿入されている。The UPS includes an inverter 1 having a switch 2 and a bypass circuit 3 having a switch 4. The inrush current supply circuit according to the present invention includes an inlet terminal U, V of a commercial AC power supply of the UPS and a load to a load. It is inserted between the output terminals U 0 and V 0 .
即ち、前記入力端子Ｕと出力端子U0との間には、ダイ
オードとサイリスタを並列接続して構成する半導体スイ
ッチ６およびリアクタ８が直列に挿入されており、入力
端子Ｖと出力端子V0との間には前記半導体スイッチ６と
同一の半導体スイッチ７が挿入されている。That is, between the input terminal U and the output terminal U 0 , a semiconductor switch 6 and a reactor 8 configured by connecting a diode and a thyristor in parallel are inserted in series, and the input terminal V and the output terminal V 0 are connected to each other. Between them, the same semiconductor switch 7 as the semiconductor switch 6 is inserted.
また、トランス５が前記入力端子Ｕ、Ｖ間に並列接続
されており、２次側に接続されているコンデンサ12およ
び13を充電させる。A transformer 5 is connected in parallel between the input terminals U and V, and charges the capacitors 12 and 13 connected to the secondary side.
前記コンデンサ12のプラス端子はゲート回路21を備え
たサイリスタ14のアノードを介して前記半導体スイッチ
６の出力側へ接続され、マイナス端子は前記半導体スイ
ッチ７の出力側に接続される。The plus terminal of the capacitor 12 is connected to the output side of the semiconductor switch 6 via the anode of the thyristor 14 having the gate circuit 21, and the minus terminal is connected to the output side of the semiconductor switch 7.
同様にして、コンデンサ13のプラス端子はゲート回路
22を備えたサイリスタ15のアノードを介して前記半導体
スイッチ７の出力側へ接続され、マイナス端子は前記半
導体スイッチ６の出力側に接続される。Similarly, the positive terminal of capacitor 13 is a gate circuit
The output terminal of the semiconductor switch 7 is connected to the output side of the semiconductor switch 7 via the anode of the thyristor 15 provided with 22, and the negative terminal is connected to the output side of the semiconductor switch 6.
前記トランス５の２次側の両端子はそれぞれダイオー
ド16および17を介して前記コンデンサ12および13のプラ
ス端子に接続されており、また前記トランス５の２次側
コイルの中間タップに接続された抵抗20はダイオード18
および19を介して前記コンデンサ12および13のマイナス
端子に接続されている。Both terminals on the secondary side of the transformer 5 are connected to the plus terminals of the capacitors 12 and 13 via diodes 16 and 17, respectively, and a resistor connected to an intermediate tap of the secondary coil of the transformer 5 20 is diode 18
And 19 are connected to the minus terminals of the capacitors 12 and 13.
インバータの出力回路のU0相側にCTが設けられてお
り、過電流が流れた場合には過電流検出器23を介してコ
ントロール回路11へ信号を送出する。And CT are provided in U 0-phase side of the output circuit of the inverter, sends a signal to the control circuit 11 via the overcurrent detector 23 when an overcurrent flows.
コントロール回路11は前記信号を受けて、過電流の発
生がU0相かV0相かを判別してゲート回路21もしくは22へ
信号を送出する。Control circuit 11 receives the signal, the occurrence of overcurrent and sends a signal to the gate circuit 21 or 22 to determine U 0 phase or V 0 phase.
ゲート回路21はサイリスタ14および半導体スイッチ７
および６のサイリスタに点弧信号を送出し、同じくゲー
ト回路22はサイリスタ15および半導体スイッチ６および
７のサイリスタに点弧信号を送出する機能をもってい
る。The gate circuit 21 includes the thyristor 14 and the semiconductor switch 7
And the thyristors of the semiconductor switches 6 and 7 have the function of sending out the ignition signal to the thyristors of the semiconductor switches 6 and 7.
従って、前記コントロール回路11からの信号をうけて
第２図に示すタイム・チャートのように作動する。Therefore, it operates as shown in the time chart of FIG. 2 in response to the signal from the control circuit 11.
第２図はU0相に突入過電流が発生した例を示してお
り、サイリスタ14の点弧によってコンデンサ12に充電さ
れていた電荷が放出され、負荷に突入電流を供給する。
ここに、リアクタ８はコンデンサから供給するピーク電
流の波形をきめるために挿入されている。Figure 2 shows an example in which inrush overcurrent is generated in U 0 phase, the charge charged in the capacitor 12 by the firing of the thyristor 14 is released, supply the inrush current to the load.
Here, the reactor 8 is inserted to determine the waveform of the peak current supplied from the capacitor.
半導体スイッチ６および７は、インバータ運転中はイ
ンバータから直送電源への逆流を防ぐ役割をしている。
突入電流が流れたことによってインバータ１がロックさ
れ、サイリスタ14もしくは15の点弧によるコンデンサ12
もしくは13からのピーク電流の供給と同時に、半導体ス
イッチ６および７に設けられているサイリスタも点弧
し、第２図に示すタイム・チャートのように直送電源か
ら負荷に対して電流を供給する。この電流供給はインバ
ータ用スイッチ２が引き外され、バイパス回路用スイッ
チ４が投入されることによってバイパス回路から負荷に
対して電力供給を始めるまでの期間行われる。The semiconductor switches 6 and 7 have a function of preventing backflow from the inverter to the direct power supply during the operation of the inverter.
The inverter 1 is locked by the flow of the inrush current, and the capacitor 12 caused by the firing of the thyristor 14 or 15 is turned on.
Alternatively, simultaneously with the supply of the peak current from 13, the thyristors provided in the semiconductor switches 6 and 7 are also fired, and the current is supplied from the direct power supply to the load as shown in the time chart of FIG. This current is supplied until the inverter switch 2 is tripped and the bypass circuit switch 4 is turned on to start supplying power to the load from the bypass circuit.
従って、コンデンサ・インプット形負荷が並入された
ことによって発生する突入電流のピーク値はコンデンサ
からの放電電流によって供給し、残余の電流を半導体ス
イッチ６および７を介して直送電源から供給してやれば
よいので、直送電源系の電圧降下やノイズ発生等の障害
を防ぐことができる。Therefore, the peak value of the inrush current generated by the parallel input of the capacitor-input type load may be supplied by the discharge current from the capacitor, and the remaining current may be supplied from the direct power supply via the semiconductor switches 6 and 7. Therefore, it is possible to prevent a failure such as a voltage drop or noise generation in the direct power supply system.
〔発明の効果〕 以上説明したように、本発明によるUPSの突入電流供
給回路は、コンデンサ・インプット形負荷の並入に伴う
ピーク値の大きい突入電流を瞬時に検出し、コントロー
ル回路を介してサイリスタを点弧させることによって予
めコンデンサに充電しておいた電荷を放電させ、負荷に
ピーク電流を供給する。[Effects of the Invention] As described above, the inrush current supply circuit of the UPS according to the present invention instantaneously detects the inrush current having a large peak value due to the inrush of the capacitor-input type load, and outputs the thyristor through the control circuit. To discharge a charge that has been charged in the capacitor in advance, thereby supplying a peak current to the load.
従って、直送電源はピーク電流以外の電流を供給する
だけでよいので、直送電源系における電圧変動やノイズ
障害を軽減できる。Therefore, since the direct power supply only needs to supply a current other than the peak current, it is possible to reduce voltage fluctuation and noise disturbance in the direct power supply system.
即ち、本発明による突入電流供給回路をバイパス回路
付きUPSに設けることによって、負荷のいかんに係らず
負荷並入に伴う突入電流を供給でき、直送電源の供給安
定度を向上させる効果もある。That is, by providing the inrush current supply circuit according to the present invention in the UPS with the bypass circuit, it is possible to supply the inrush current accompanying the load irrespective of the load, and there is also an effect of improving the supply stability of the direct power supply.
第１図は本発明に係るUPSの突入電流供給回路の電気回
路図、第２図は突入電流供給回路の動作を説明するため
のタイム・チャートである。 １……インバータ、 2,4……スイッチ、 ３……バイパス回路、 ５……トランス、 6,7……半導体スイッチ、 ８……リアクタ、 11……コントロール回路、 12,13……コンデンサ、 14,15……サイリスタ、 21,22……ゲート回路、 23……過電流検出器。FIG. 1 is an electric circuit diagram of a rush current supply circuit of a UPS according to the present invention, and FIG. 2 is a time chart for explaining the operation of the rush current supply circuit. 1 ... Inverter, 2,4 ... Switch, 3 ... Bypass circuit, 5 ... Transformer, 6,7 ... Semiconductor switch, 8 ... Reactor, 11 ... Control circuit, 12,13 ... Capacitor, 14 , 15 thyristor 21,22 gate circuit 23 overcurrent detector
Claims (1)
よび並列接続したスイッチを備えたバイパス回路等によ
って構成した常時インバータ給電方式の交流無停電電源
装置であって、 上記バイパス回路の２つの入力端子とインバータの２つ
の出力回路端子との間にそれぞれ挿入したダイオードと
サイリスタを並列接続した半導体スイッチより成る回
路、並びに、上記半導体スイッチとリアクタを直列接続
した回路と、 １次側は上記２組の半導体スイッチの入力側に並列接続
し、２次側の両端子はそれぞれダイオードを介してコン
デンサのプラス側に接続すると共に、２次側中間タップ
に抵抗を設け、それぞれダイオードを介して上記２組の
コンデンサのマイナス側に接続したトランスと、 上記２組のコンデンサのプラス側をそれぞれサイリスタ
を介して上記半導体スイッチの出力側に接続し、同じく
マイナス側をそれぞれ反対側の半導体スイッチの出力側
に接続した２組の並列回路と、 さらに、上記インバータの出力回路の一線に設けた過電
流検出器によってピーク電流を検出し、この検出信号を
うけて上記コンデンサのプラス側端子に接続した２組の
サイリスタおよび上記半導体スイッチを構成する２組の
サイリスタを選択点孤させる２組のゲート回路を備えた
コントロール回路と、 によって構成したことを特徴とする交流無停電電源装置
の突入電流供給回路。An AC uninterruptible power supply of a constant inverter power supply type comprising an inverter provided with a switch in an output circuit and a bypass circuit provided with a switch connected in parallel, comprising two input terminals of the bypass circuit. A circuit composed of a semiconductor switch in which a diode and a thyristor inserted between two output circuit terminals of an inverter are connected in parallel, a circuit in which the semiconductor switch and a reactor are connected in series, and a primary side comprising the two sets of semiconductors A parallel connection is made to the input side of the switch. Both terminals on the secondary side are connected to the positive side of the capacitor via a diode, respectively, and a resistor is provided at the intermediate tap on the secondary side. Connect the transformer connected to the negative side of the Two sets of parallel circuits connected to the output side of the above-mentioned semiconductor switch via the inverter, and the minus side is connected to the output side of the opposite side of the semiconductor switch. A peak detector is detected by a current detector, and two sets of thyristors connected to the positive terminal of the capacitor and two sets of thyristors constituting the semiconductor switch are selected and turned on in response to the detection signal. A rush current supply circuit for an AC uninterruptible power supply, comprising: a control circuit comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1118245A JP2776559B2 (en) | 1989-05-11 | 1989-05-11 | Inrush current supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1118245A JP2776559B2 (en) | 1989-05-11 | 1989-05-11 | Inrush current supply circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02299435A JPH02299435A (en) | 1990-12-11 |
| JP2776559B2 true JP2776559B2 (en) | 1998-07-16 |
Family
ID=14731832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1118245A Expired - Lifetime JP2776559B2 (en) | 1989-05-11 | 1989-05-11 | Inrush current supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2776559B2 (en) |
-
1989
- 1989-05-11 JP JP1118245A patent/JP2776559B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02299435A (en) | 1990-12-11 |
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