CN1130824A - Combination solid switch for connecting or disconnecting power capacitor - Google Patents

Combination solid switch for connecting or disconnecting power capacitor Download PDF

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Publication number
CN1130824A
CN1130824A CN 95112542 CN95112542A CN1130824A CN 1130824 A CN1130824 A CN 1130824A CN 95112542 CN95112542 CN 95112542 CN 95112542 A CN95112542 A CN 95112542A CN 1130824 A CN1130824 A CN 1130824A
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CN
China
Prior art keywords
switch
capacitor
diode
power capacitor
pulse
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Granted
Application number
CN 95112542
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Chinese (zh)
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CN1058821C (en
Inventor
李恭敢
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Changhua Electric Equipment Group Co.,Ltd.
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李恭敢
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Priority to CN95112542A priority Critical patent/CN1058821C/en
Publication of CN1130824A publication Critical patent/CN1130824A/en
Application granted granted Critical
Publication of CN1058821C publication Critical patent/CN1058821C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The on/off switch for connection or disconnection of power capacitor in electric network features that diode is inversely parallel with SCR whose control electrode is connected to control pulse generator circuit. The pulse generated by pulse generator circuit starts when the voltages at two ends of SCR are equal to each other and has the same period as voltage of electric network. Its response time is equal to one period of electric network frequency for rapidly tracking the load variation in reactive power, speeding up inactive compensation and elongating service life of capacity.

Description

The combined solid switch of switching power capacitor
The present invention relates to a kind of switch that in power line network, drops into and excise power capacitor.
At present drop into or excise power capacitor with various switches (for example contactor) mostly, this method nearly all will produce transient process, therefore in use must strictly control the minimum interval that drops into again after the excision, is generally several minutes.Because the existence of switching transient process has reduced the life-span of power capacitor and increased the switch maintenance workload, and,, be impossible with this switch compensation in the occasion that some fast reactive change.
The switch that the purpose of this invention is to provide a kind of switching power capacitor makes switching not have transient process fully, reaches desirable reactive power compensation effect, and prolongs the useful life of power capacitor.
The solution of the present invention is: the anode of diode is connected the end of back as this switch with the silicon controlled negative electrode, the negative electrode of above-mentioned diode and silicon controlled anode link as the other end of this switch, this silicon controlled control utmost point and control pulse generation circuit link, the pulse starting point that control pulse generation circuit produces is positioned at the moment that the controllable silicon both end voltage equates, the pulse period is consistent with the line voltage cycle.
The present invention is sealed in circuit, and when control pulse generation circuit was not exported pulse, capacitor was recharged, diode reverse biased, and the present invention disconnects.Drop into capacitor as desire, in the controllable silicon both end voltage is the zero moment, add a pulse that can make its conducting at the SCR control utmost point, make controllable silicon conducting half period, be right after the half period diode current flow, because control impuls is consistent with the line voltage cycle, next control impuls makes the controllable silicon conducting once more, repeat conducting like this, capacitor is dropped in the power circuit.As desire excision capacitor, as long as stop control impuls, then after diode current flow finished, the present invention turn-offed capacitor is excised.Input of the present invention and excision are spaced apart the one-period of frequency of supply the capacitor shortest time, and the follow load reactive power changes fast, has improved the reactive power compensation reaction speed, prolong capacitor useful life simultaneously greatly.
Fig. 1 is a structural representation of the present invention.
Fig. 2 uses schematic diagram of the present invention during for delta connection.
Fig. 3 is used for schematic diagram under the hyperbaric environment for the present invention.
Fig. 4 is an embodiment of the invention schematic diagram.
Fig. 5 is a signal waveforms in the circuit.
Among Fig. 1, behind diode D and the controllable silicon S reverse parallel connection, its two end is as two ends 1,2 of the present invention, and the control utmost point 3 of controllable silicon S meets control pulse generation circuit PG, it is moment of zero that the pulse starting point that is produced by this circuit is positioned at controllable silicon S both end voltage, and the pulse period is consistent with line voltage.
Fig. 2 is the enforcement schematic diagram of the present invention when being used for the load of three-phase equilibrium.
Among Fig. 3, under hyperbaric environment, the series circuit of the present invention and resistance R, capacitor C and connect after, carry out N and heavily connect, to play the dividing potential drop effect.
Among Fig. 4, to insert after the series capacitance of the present invention in the A circuitry phase of power circuit, in order to reduce the original charge electric current, run jointly earlier and close S1, charge to capacitor C through resistance R 1, diode D, after a period of time, S2 again closes a switch, capacitor C 1 both end voltage keeps A phase positive peak voltage, diode D reverse bias then, and no current flows through from capacitor C.The C phase voltage is sent into synchrotrans T2, adjusts P1 and make comparator IC1 produce a positive transition in the moment of A phase voltage positive peak, this time inscribe that voltage is zero between controllable silicon S negative electrode and anode.The positive spike of this positive transition is taken out in above-mentioned positive transition by diode D7 behind differential circuit C4, R11, be that a burst pulse is delivered to power amplification circuit M1, C1, R3 by the IC2 broadening again.When switch S 3 disconnected, this pulse can not be delivered to the control utmost point of controllable silicon S; Carve at a time when switch S 3 and to close, then control impuls can be delivered to the control utmost point of controllable silicon S immediately following the A phase positive peak voltage arrival in this moment the time, thereby the present invention enters operate as normal.S3 carves when disconnecting at a time, and uncontrolled pulse is sent when the A phase positive peak voltage immediately following this moment arrives, and the present invention turn-offs.
V among Fig. 5 ANBe A phase voltage, V CNBe C phase voltage, V SBe the IC1 output end voltage, V3 is the control pole tension of controllable silicon S, V cBe capacitor C both end voltage, I cFor flowing through the electric current of capacitor C.t xBe the moment of supposition Closing Switch S3, t yFor disconnecting the moment of S3.

Claims (1)

1, a kind of combined solid switch of switching power capacitor, it is characterized in that the anode of diode is connected the end of back as this switch with the silicon controlled negative electrode, the negative electrode of above-mentioned diode and silicon controlled anode link as the other end of this switch, this silicon controlled control utmost point and control pulse generation circuit link, the pulse starting point that control pulse generation circuit produces is positioned at the moment that the controllable silicon both end voltage equates, the pulse period is consistent with the line voltage cycle.
CN95112542A 1995-11-13 1995-11-13 Combination solid switch for connecting or disconnecting power capacitor Expired - Fee Related CN1058821C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN95112542A CN1058821C (en) 1995-11-13 1995-11-13 Combination solid switch for connecting or disconnecting power capacitor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN95112542A CN1058821C (en) 1995-11-13 1995-11-13 Combination solid switch for connecting or disconnecting power capacitor

Publications (2)

Publication Number Publication Date
CN1130824A true CN1130824A (en) 1996-09-11
CN1058821C CN1058821C (en) 2000-11-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN95112542A Expired - Fee Related CN1058821C (en) 1995-11-13 1995-11-13 Combination solid switch for connecting or disconnecting power capacitor

Country Status (1)

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CN (1) CN1058821C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102738783A (en) * 2012-06-27 2012-10-17 昌华电气设备集团有限公司 Connecting circuit for absorbing power grid overvoltage by utilizing capacitors of reactive compensation devices
CN103971965A (en) * 2013-01-31 2014-08-06 南京南瑞继保电气有限公司 Line current breaking device and control method thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2033554U (en) * 1988-06-01 1989-03-01 苏州市海达电器开关厂 Reactive power compensating device
CN2155102Y (en) * 1993-05-20 1994-02-02 邓景滨 Semiconductor switch for power condenser control
CN2171156Y (en) * 1993-08-11 1994-07-06 陈正浩 Switch for capacitor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102738783A (en) * 2012-06-27 2012-10-17 昌华电气设备集团有限公司 Connecting circuit for absorbing power grid overvoltage by utilizing capacitors of reactive compensation devices
CN102738783B (en) * 2012-06-27 2014-12-17 昌华电气设备集团有限公司 Connecting circuit for absorbing power grid overvoltage by utilizing capacitors of reactive compensation devices
CN103971965A (en) * 2013-01-31 2014-08-06 南京南瑞继保电气有限公司 Line current breaking device and control method thereof
CN103971965B (en) * 2013-01-31 2015-12-23 南京南瑞继保电气有限公司 A kind of device and control method thereof making line current disjunction

Also Published As

Publication number Publication date
CN1058821C (en) 2000-11-22

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Owner name: CHANGHUA ELECTRIC EQUIPMENT GROUP CO., LTD.

Free format text: FORMER OWNER: LI GONGGAN

Effective date: 20120517

C41 Transfer of patent application or patent right or utility model
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Effective date of registration: 20120517

Address after: 430065, No. four, No. 16, Northwest Lake Road, Zhushan Lake Road, Wuhan economic and Technological Development Zone, Hubei, China

Patentee after: Changhua Electric Equipment Group Co.,Ltd.

Address before: 430072 Department of computer science, Wuhan University of water conservancy and electric power, Hubei

Patentee before: Li Gonggan

C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20001122

Termination date: 20131113