CN105680457A - Novel thyristor switch switching circuit - Google Patents
Novel thyristor switch switching circuit Download PDFInfo
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- CN105680457A CN105680457A CN201610237499.7A CN201610237499A CN105680457A CN 105680457 A CN105680457 A CN 105680457A CN 201610237499 A CN201610237499 A CN 201610237499A CN 105680457 A CN105680457 A CN 105680457A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The invention relates to a novel thyristor switch switching circuit, especially relates to the thyristor switch switching circuit which carries out switching at a zero voltage moment, and belongs to the technical field of power electronics. The novel thyristor switch switching circuit comprises a thyristor (1) and a switching capacitor controller (6). The thyristor (1) is connected with a zero-crossing detection circuit (2). The switching capacitor controller (6) is connected with a triggering control and locking protection circuit (5). The zero-crossing detection circuit (2) and the triggering control and locking protection circuit (5) are connected with a triggering waveform generation circuit (3) through an and gate U13. The triggering waveform generation circuit (3) is connected with the thyristor (1) through a triggering driving circuit (4). According to the invention, the structure is simple, the design is reasonable, the damage degree of the thyristor is substantially reduced, the poor influences of high frequency oscillation on an electric power system are reduced, and the practicality is relatively high.
Description
Technical field
The present invention relates to a kind of novel thyristor switch switching circuit, relate in particular to a kind of thyristor switch of no-voltage moment switchingSwitching circuit, belongs to electric and electronic technical field.
Background technology
The open and close of IGCT are contactless, and its operation lifetime is almost unlimited, and the switching of IGCT can be fast without punchingHit capacitor is accessed to electrical network, the operating difficulties problem can reduce switching time, realizes dynamic reactive-load compensation, raising electric energyQuality, therefore, thyristor switchable capacitor has become a kind of dynamic reactive compensation device that is widely used in distribution system. But,IGCT drops into the moment of capacitor, the moment that namely IGCT is opened, and must be the amplitude of supply voltage and capacitor residual voltageThe moment identical with phase place. Because according to the characteristic of capacitor, in the time being added in voltage on electric capacity and having step to change, will produce impactElectric current, can damage IGCT, brings the adverse effects such as the higher-order of oscillation also can to place power system.
Summary of the invention
According to above deficiency of the prior art, the problem to be solved in the present invention is: provide a kind of simple in structure, reasonable in design, energyEnough greatly reduce IGCT damage amount, reduce the novel thyristor switch of the higher-order of oscillation adverse effect that place power system is producedSwitching circuit.
The technical solution adopted for the present invention to solve the technical problems is:
Described novel thyristor switch switching circuit, comprises IGCT and switched capacitor controller, and IGCT connects zero passage inspectionSlowdown monitoring circuit, switched capacitor controller connects to trigger to be controlled and locked holding circuit, and zero cross detection circuit and triggering are controlled and locked guarantorProtection circuit triggers Waveform generating circuit by being connected with door U13, triggers Waveform generating circuit and connects IGCT by triggering drive circuit.
Described novel thyristor switch switching circuit is by gathering the zero cross signal of IGCT, if the zero cross signal gathering is effectiveSignal, when switching controller sends useful signal simultaneously, by triggering Waveform generating circuit and triggering drive circuit and carry out signal processing,Signal after ovennodulation triggers IGCT, reduces IGCT damage amount, reduces the higher-order of oscillation that power system is produced unfavorableImpact.
Further preferably, be connected the 555 multivibrator U10 that trigger Waveform generating circuit with door U13,555 multivibrator U10Output connect mu balanced circuit and amplifying circuit, amplifying circuit connects pulse transformer, pulse transformer connects rectification circuit, wholeCurrent circuit connects IGCT by binding post. By 555 multivibrator U10 produce trigger impulses, trigger impulse by voltage stabilizing,After the modulation of amplification, transformation and rectification, become the trigger impulse that is applicable to IGCT, can play certain protective effect to IGCT,Simple in structure, practical.
Further preferably, zero cross detection circuit comprises optocoupler U1, and 1 pin of optocoupler U1 and 2 pin are respectively by resistance R 1 and resistance R 2Connect IGCT, the 3 pin ground connection of optocoupler U1,4 pin of optocoupler U1 are by the rear connection power supply of resistance R 47 VCC, 4 pin and the electricity of optocoupler U1The public point U1_4 of resistance R47 connects the 7 pin signal input parts with door U13.
Further preferably, optocoupler U1 two ends optocoupler U2 in parallel, 1 pin of optocoupler U2 is connected with resistance R 2 by resistance R 1 respectively with 2 pinIGCT, the 3 pin ground connection of optocoupler U2,4 pin of optocoupler U2 are by the rear connection power supply of resistance R 47 VCC, 4 pin of optocoupler U2 and resistance R 47Public point U1_4 connect with door U13 7 pin signal input parts.
Adopt two optocoupler U1 in parallel and optocoupler U2, in the time that the residual voltage of supply voltage and capacitor is unequal, needs only IGCT and power onPress the difference of U2_1 and U2_2 non-vanishing, optocoupler U1 and U2 conducting, U1_4 place is low level, trigger impulse control signal is inactive level,IGCT is in off state.
Further preferably, trigger control and comprise the binding post P1 that is connected switched capacitor controller, wiring with locked holding circuit1 pin of terminals P 1 connects 1 pin of optocoupler U7, and 2 pin of binding post P1 are connected 2 pin of optocoupler U7 with diode D38 by resistance R 28,3 pin of optocoupler U7 connect the locked holding circuit of pulse, and 4 pin of optocoupler U7 are connected power supply VCC by resistance R 7 with resistance R 40, resistance R 7With the base stage of the common port connecting triode D49 of resistance R 40, the colelctor electrode of triode D49 is by resistance R 12 ground connection, triode D49Emitter stage connect power supply VCC, the public point D49_C of the colelctor electrode of triode D49 and resistance R 12 is connected the 5 pin signals with a U13Input.
Further preferably, the locked holding circuit of pulse comprises triode D50 and temperature sensing switch RMR, the current collection of triode D50The utmost point connects 3 pin of optocoupler U7, and the base stage of triode D50 connects power supply VCC by resistance R 37, the base stage of triode D50 and resistance R 37Common port connect 1 pin, 2 pin of temperature sensing switch RMR and the grounded emitter of triode D50 of temperature sensing switch RMR. P1For binding post, P1 fetches the control signal of self-switchover capacitor controller, RMR jointing temp sensitive switch. When from switching capacitanceThe control signal of device controller is effective, and temperature is not while exceeding standard, optocoupler conducting, and D49_C is significant level. When from switching capacitanceThe control signal of device controller is invalid, and temperature is not while exceeding standard, and optocoupler turn-offs, and D49_C is inactive level. Work as temperature exceeding standard, temperatureDegree switch closure, now no matter whether the control signal of switched capacitor controller is effective, and D49_C be inactive level, and pulse is lockedExtremely.
Further preferably, door U13 connects 4 pin of 555 multivibrator U10, the 1 pin ground connection of 555 multivibrator U10,555The 2 pin contact resistance R31 of multivibrator U10 and the rear connection power supply of resistance R 34 VCC, resistance R 31 two ends parallel diode D35,5553 pin of multivibrator U10 are by the base stage of Zener diode D42 and resistance R 23 connecting triode D28, the colelctor electrode of triode D28Connect pulse transformer L1, pulse transformer L1 connects binding post P5 by the first rectifier bridge, and the emitter stage of triode D28 connectsPulse transformer L2, pulse transformer L2 connects binding post P6 by the second rectifier bridge, and binding post P5 is connected with binding post P6IGCT, arranges pull down resistor R42 between the base stage of triode D28 and emitter stage, the emitter stage of triode D28 and pulse transformer3 pin of L2 connect power supply VCC, series capacitance C6 between 3 pin of pulse transformer L1 and 1 pin of pulse transformer L2, and 555 multi resonants shakeSwing the 4 pin connections of device U10 and the signal output part of door U13,4 pin connecting luminous diode LED and the resistance of 555 multivibrator U10Ground connection after R21,6 pin of 555 multivibrator U10 connect the rear ground connection of capacitor C 9, the 7 pin contact resistance R34 of 555 multivibrator U10With the common port of resistance R 31,8 pin of 555 multivibrator U10 connect power supply VCC.
Further preferably, 3 pin of 555 multivibrator U10 are connected Zener diode D41 with the common port of Zener diode D42,Zener diode D41 links the base stage of triode D25 by resistance R 22, the current collection of the colelctor electrode connecting triode D28 of triode D25The common port of the utmost point and pulse transformer L1, the grounded emitter of triode D25, arranges down between the base stage of triode D25 and emitter stageDraw resistance R 41. In the time that to drop into signal D49_C and zero cross signal U1_4 be all effective, U10_RESET is significant level, now, and U10In running order, start to export the pulse signal of trigger impulse frequency 20us, amplitude+12V～0V. After this signal process conditioning,Become the trigger impulse that is applicable to IGCT, by P5, P6 outputs to IGCT.
Further preferably, 1 pin of binding post P1 connects 1 pin, 1 pin of optocoupler U8 and 1 pin of optocoupler U9 of optocoupler U7, terminals2 pin of sub-P1 are connected 2 pin of optocoupler U7 with diode D38 by resistance R 28,3 pin of binding post P1 are by resistance R 29 and diodeD39 connects 2 pin of optocoupler U8, and 4 pin of binding post P1 are connected 2 pin of optocoupler U9, optocoupler U7 with diode D40 by resistance R 303 pin, 3 pin of optocoupler U8 and 3 pin of optocoupler U9 be all connected the locked holding circuit of pulse, 4 pin of optocoupler U7 are by resistance R 7 and resistanceR40 connects power supply VCC, the base stage of the common port connecting triode D49 of resistance R 7 and resistance R 40, and the colelctor electrode of triode D49 passes throughResistance R 12 ground connection, the emitter stage of triode D49 connects power supply VCC, the public point of the colelctor electrode of triode D49 and resistance R 12D49_C connects the 5 pin signal input parts with door U13, and 4 pin of optocoupler U8 are connected power supply VCC by resistance R 8 with resistance R 39, resistance R 8With the base stage of the common port connecting triode D48 of resistance R 39, the colelctor electrode of triode D48 is by resistance R 10 ground connection, triode D48Emitter stage connect power supply VCC, the public point D48_C of the colelctor electrode of triode D48 and resistance R 10 is connected the 5 pin signals with a U13Input, 4 pin of optocoupler U9 are connected power supply VCC by resistance R 9 with resistance R 38, and resistance R 9 is connected three utmost points with the common port of resistance R 38The base stage of pipe D47, the colelctor electrode of triode D47 is by resistance R 11 ground connection, and the emitter stage of triode D47 connects power supply VCC, three utmost pointsThe pipe colelctor electrode of D47 and the public point D47_C of resistance R 11 are connected the 5 pin signal input parts with door U13. When receiving self-switchoverWhen capacitor controller signal, optocoupler U7, U8, U9 conducting, now U7_4, U8_4, U9_4 are high level, triode D49 leadsLogical, D49_C is high level, thereby produces pulse triggering signal.
The beneficial effect that the present invention has is:
Described novel thyristor switch switching circuit structure is simple, reasonable in design, has step to change being added on electric capacity point voltageProduce when dash current, by zero cross detection circuit, trigger and control and the locked circuit of pulse and trigger Waveform generating circuit and triggering is drivenThe cooperation of moving circuit, carries out the conditioning of signal, can become the trigger impulse that is applicable to IGCT, has greatly reduced IGCT damage amount,The adverse effect that has reduced the higher-order of oscillation that place power system is produced, has stronger practicality.
Brief description of the drawings
Fig. 1 is circuit theory diagrams one of the present invention;
Fig. 2 is circuit theory diagrams two of the present invention;
Fig. 3 is zero cross detection circuit figure of the present invention;
Fig. 4 is triggering control of the present invention and the locked circuit diagram one of pulse;
Fig. 5 is triggering Waveform generating circuit of the present invention and triggers drive circuit figure;
Fig. 6 is triggering control of the present invention and the locked circuit diagram two of pulse;
Fig. 7 is of the present invention and door and the connection diagram of 555 multivibrators;
Wherein, 1, IGCT; 2, zero cross detection circuit; 3, trigger Waveform generating circuit; 4, trigger drive circuit; 5, touchSend out and control and locked holding circuit; 6, switched capacitor controller; 7, mu balanced circuit; 8, amplifying circuit; 9, pulse transformingDevice; 10, rectification circuit; 11, binding post.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described further:
As shown in Fig. 1-Fig. 7, novel thyristor switch switching circuit of the present invention, comprises IGCT 1 and switched capacitor controlDevice 6 processed, is characterized in that: IGCT 1 connects zero cross detection circuit 2, and switched capacitor controller 6 connects to trigger to be controlled and locked guarantorProtection circuit 5, zero cross detection circuit 2 triggers Waveform generating circuit 3 with triggering to control with locked holding circuit 5 by being connected with door U13,Trigger Waveform generating circuit 3 and connect IGCT 1 by triggering drive circuit 4.
As shown in Figure 2, of the present invention with door a U13 be connected the 555 multivibrator U10 that trigger Waveform generating circuit 3,555 multi resonantsThe output of oscillator U10 connects mu balanced circuit 7 and amplifying circuit 8, and amplifying circuit 8 connects pulse transformer 9, pulse transformer 9Connect rectification circuit 10, rectification circuit 10 connects IGCT 1 by binding post 11.
As shown in Figure 3, zero cross detection circuit 2 comprises optocoupler U1, and 1 pin of optocoupler U1 is connected with resistance R 2 by resistance R 1 respectively with 2 pinIGCT 1, the 3 pin ground connection of optocoupler U1,4 pin of optocoupler U1 are by the rear connection power supply of resistance R 47 VCC, 4 pin of optocoupler U1 and resistance R 47Public point U1_4 connect with door U13 7 pin signal input parts. Described optocoupler U1 two ends optocoupler U2 in parallel, 1 pin of optocoupler U2Be connected IGCT 1 by resistance R 1 with resistance R 2 respectively with 2 pin, the 3 pin ground connection of optocoupler U2,4 pin of optocoupler U2 are by after resistance R 47Connect power supply VCC, 4 pin of optocoupler U2 are connected the 7 pin signal input parts with door U13 with the public point U1_4 of resistance R 47.
As shown in Figure 4, trigger control and comprise the binding post P1 that is connected switched capacitor controller 6, wiring with locked holding circuit 51 pin of terminals P 1 connects 1 pin of optocoupler U7, and 2 pin of binding post P1 are connected 2 pin of optocoupler U7 with diode D38 by resistance R 28,3 pin of optocoupler U7 connect the locked holding circuit of pulse, and 4 pin of optocoupler U7 are connected power supply VCC by resistance R 7 with resistance R 40, resistance R 7With the base stage of the common port connecting triode D49 of resistance R 40, the colelctor electrode of triode D49 is by resistance R 12 ground connection, triode D49Emitter stage connect power supply VCC, the public point D49_C of the colelctor electrode of triode D49 and resistance R 12 is connected the 5 pin signals with a U13Input. The locked holding circuit of pulse comprises triode D50 and temperature sensing switch RMR, and the colelctor electrode of triode D50 connects optocoupler3 pin of U7, the base stage of triode D50 connects power supply VCC by resistance R 37, and the common port of the base stage of triode D50 and resistance R 37 connects1 pin of jointing temp sensitive switch RMR, 2 pin of temperature sensing switch RMR and the grounded emitter of triode D50.
As shown in Figure 5, described door U13 connects 4 pin of 555 multivibrator U10,1 pin (GND) of 555 multivibrator U10Ground connection, 2 pin (TRIG) the contact resistance R31 of 555 multivibrator U10 and the rear connection power supply of resistance R 34 VCC, resistance R 31 two endsParallel diode D35,3 pin (OUT) of 555 multivibrator U10 are by Zener diode D42 and resistance R 23 connecting triode D28Base stage, the colelctor electrode of triode D28 connects pulse transformer L1, pulse transformer L1 connects binding post by the first rectifier bridgeP5, the emitter stage of triode D28 connects pulse transformer L2, and pulse transformer L2 connects binding post P6 by the second rectifier bridge,Binding post P5 is connected IGCT 1 with binding post P6, pull down resistor R42 is set, three between the base stage of triode D28 and emitter stageThe emitter stage of utmost point pipe D28 is connected power supply VCC with 3 pin of pulse transformer L2,1 of 3 pin of pulse transformer L1 and pulse transformer L2Series capacitance C6 between pin, 4 pin (RESET) of 555 multivibrator U10 connect the signal output part with door U13, and 555 multi resonants shakeSwing 4 pin connecting luminous diode LED and the rear ground connection of resistance R 21 of device U10,6 pin (THRES) of 555 multivibrator U10 connect electricityGround connection after appearance C9,7 pin (DISCH) the contact resistance R34 of 555 multivibrator U10 and the common port of resistance R 31,555 multi resonants shake8 pin (VCC) that swing device U10 connect power supply VCC. Described 3 pin of 555 multivibrator U10 and the common port of Zener diode D42Connect Zener diode D41, Zener diode D41 links the base stage of triode D25, the colelctor electrode of triode D25 by resistance R 22The common port of the colelctor electrode of connecting triode D28 and pulse transformer L1, the grounded emitter of triode D25, the base of triode D25Pull down resistor R41 is set between the utmost point and emitter stage.
As shown in Figure 6,1 pin of binding post P1 connects 1 pin, 1 pin of optocoupler U8 and 1 pin of optocoupler U9 of optocoupler U7, binding post2 pin of P1 are connected 2 pin of optocoupler U7 with diode D38 by resistance R 28,3 pin of binding post P1 are by resistance R 29 and diodeD39 connects 2 pin of optocoupler U8, and 4 pin of binding post P1 are connected 2 pin of optocoupler U9, optocoupler U7 with diode D40 by resistance R 303 pin, 3 pin of optocoupler U8 and 3 pin of optocoupler U9 be all connected the locked holding circuit of pulse, 4 pin of optocoupler U7 are by resistance R 7 and resistanceR40 connects power supply VCC, the base stage of the common port connecting triode D49 of resistance R 7 and resistance R 40, and the colelctor electrode of triode D49 passes throughResistance R 12 ground connection, the emitter stage of triode D49 connects power supply VCC, the public point of the colelctor electrode of triode D49 and resistance R 12D49_C connects the 5 pin signal input parts with door U13, and 4 pin of optocoupler U8 are connected power supply VCC by resistance R 8 with resistance R 39, resistance R 8With the base stage of the common port connecting triode D48 of resistance R 39, the colelctor electrode of triode D48 is by resistance R 10 ground connection, triode D48Emitter stage connect power supply VCC, the public point D48_C of the colelctor electrode of triode D48 and resistance R 10 is connected the 5 pin signals with a U13Input, 4 pin of optocoupler U9 are connected power supply VCC by resistance R 9 with resistance R 38, and resistance R 9 is connected three utmost points with the common port of resistance R 38The base stage of pipe D47, the colelctor electrode of triode D47 is by resistance R 11 ground connection, and the emitter stage of triode D47 connects power supply VCC, three utmost pointsThe pipe colelctor electrode of D47 and the public point D47_C of resistance R 11 are connected the 5 pin signal input parts with door U13.
Use procedure of the present invention and operation principle:
The operation principle of zero cross detection circuit: in the time that supply voltage equates with the residual voltage of capacitor, the voltage on IGCT is zero, lightNot conducting of coupling U1,4 pin of optocoupler U1 and the public point U1_4 of resistance R 47 output high level (power supply VCC), the high level of outputBe sent to and 7 pin of door U13, if now switching controller 6 drops into instruction D49_C and exists, the useful signal that drops into instruction D49_C passesDeliver to and 5 pin of door U13, export with door U13 the core that trigger impulse control signal U10_RESET produces to trigger impulse effectively soSheet 555 multivibrator U10 are upper, thereby produce trigger impulse, ensure the conducting of IGCT, steadily drop into capacitor; When power supply electricityPress when unequal with the residual voltage of capacitor, on IGCT, voltage is non-vanishing, optocoupler conducting, 4 pin of optocoupler U1 and resistance R 47 publicEnd points U1_4 output low level, trigger impulse control signal is inactive level, IGCT is in off state.
Trigger the operation principle of controlling with locked holding circuit: P1 fetches the control signal of self-switchover controller 6, RMR jointing temp sensingSwitch. When effective from the control signal of switching controller 6, and temperature is not while exceeding standard, optocoupler conducting, the colelctor electrode of triode D49With the public point D49_C of resistance R 12 be significant level. When invalid from the control signal of switching controller 6, and temperature does not exceed standardTime, optocoupler turn-offs, and the public point D49_C of the colelctor electrode of triode D49 and resistance R 12 is inactive level. Work as temperature exceeding standard, temperatureDegree switch closure, now no matter whether the control signal of controller is effective, the public point of the colelctor electrode of triode D49 and resistance R 12D49_C is inactive level, and pulse is locked.
Trigger impulse produces the operation principle of circuit: in the time that to drop into signal D49_C and zero cross signal U1_4 be all effective, and input signalD49_C and zero cross signal U1_4 are connected respectively 5 pin and 7 pin with door U13, by with computing and the judgement of door U13, export with door U13Useful signal, inputs useful signal with door U13 4 pin (RESET) of 555 multivibrator U10,555 multivibrator U10'sRESET is significant level, and signal is through 555 multivibrator U10, mu balanced circuit 7, amplifying circuit, pulse transformer and rectified currentAfter the conditioning on road, become the trigger impulse that is applicable to IGCT, output to IGCT by binding post P5 and binding post P6. Wherein,Pulse frequency is by R34, R31, and C9 determines. T1=0.693*R34*C9, T2=0.693*R31*C9, frequency is 1/ (T1+T2),T1 is high level time, and T2 is low level time.
Novel thyristor switch switching circuit of the present invention can become signal the trigger impulse that is applicable to IGCT, greatly subtractsLack IGCT damage amount, reduced the adverse effect of the higher-order of oscillation that place power system is produced, simple in structure, reasonable in design,There is stronger practicality.
Claims (9)
1. a novel thyristor switch switching circuit, comprises IGCT (1) and switched capacitor controller (6), its spyLevy and be: IGCT (1) connects zero cross detection circuit (2), switched capacitor controller (6) connects triggering control and lockedHolding circuit (5), zero cross detection circuit (2) is controlled with locked holding circuit (5) by being connected triggering with door U13 with triggeringWaveform generating circuit (3), triggers Waveform generating circuit (3) and connects IGCT (1) by triggering drive circuit (4).
2. novel thyristor switch switching circuit according to claim 1, is characterized in that: described is connected with door U13Trigger 555 multivibrator U10 of Waveform generating circuit (3), the output of 555 multivibrator U10 connects mu balanced circuit (7)And amplifying circuit (8), amplifying circuit (8) connects pulse transformer (9), and pulse transformer (9) connects rectification circuit (10),Rectification circuit (10) connects IGCT (1) by binding post (11).
3. novel thyristor switch switching circuit according to claim 1, is characterized in that: described zero passage detection electricityRoad (2) comprises optocoupler U1, and 1 pin of optocoupler U1 is connected respectively IGCT (1), optocoupler U1 with 2 pin with resistance R 2 by resistance R 13 pin ground connection, 4 pin of optocoupler U1 are by the rear connection power supply of resistance R 47 VCC, 4 pin of optocoupler U1 and the public point U1_4 of resistance R 47Connect the 7 pin signal input parts with door U13.
4. novel thyristor switch switching circuit according to claim 3, is characterized in that: described optocoupler U1 two endsOptocoupler U2 in parallel, 1 pin of optocoupler U2 is connected respectively IGCT (1) with 2 pin with resistance R 2 by resistance R 1, the 3 pin ground connection of optocoupler U2,4 pin of optocoupler U2 are by the rear connection power supply of resistance R 47 VCC, and 4 pin of optocoupler U2 are connected with the public point U1_4 of resistance R 47 and doorThe 7 pin signal input parts of U13.
5. novel thyristor switch switching circuit according to claim 1, is characterized in that: described triggering control andLocked holding circuit (5) comprises the binding post P1 that connects switched capacitor controller (6), and 1 pin of binding post P1 connects light1 pin of coupling U7,2 pin of binding post P1 are connected 2 pin of optocoupler U7 with diode D38 by resistance R 28, and 3 pin of optocoupler U7 connectThe locked holding circuit of pulse, 4 pin of optocoupler U7 are connected power supply VCC by resistance R 7 with resistance R 40, the public affairs of resistance R 7 and resistance R 40Hold altogether the base stage of connecting triode D49, the colelctor electrode of triode D49 is by resistance R 12 ground connection, and the emitter stage of triode D49 connectsPower supply VCC, the public point D49_C of the colelctor electrode of triode D49 and resistance R 12 is connected the 5 pin signal input parts with door U13.
6. novel thyristor switch switching circuit according to claim 5, is characterized in that: the locked guarantor of described pulseProtection circuit comprises triode D50 and temperature sensing switch RMR, and the colelctor electrode of triode D50 connects 3 pin of optocoupler U7, triode D50Base stage connect power supply VCC by resistance R 37, the base stage of triode D50 is connected temperature sensing switch RMR with the common port of resistance R 371 pin, 2 pin of temperature sensing switch RMR and the grounded emitter of triode D50.
7. novel thyristor switch switching circuit according to claim 1 and 2, is characterized in that: described door U13 connectsConnect 4 pin of 555 multivibrator U10, the 1 pin ground connection of 555 multivibrator U10, the 2 pin contact resistances of 555 multivibrator U10R31 and the rear connection power supply of resistance R 34 VCC, resistance R 31 two ends parallel diode D35,3 pin of 555 multivibrator U10 are by steadyPress the base stage of diode D42 and resistance R 23 connecting triode D28, the colelctor electrode of triode D28 connects pulse transformer L1, pulseTransformer L1 connects binding post P5 by the first rectifier bridge, and the emitter stage of triode D28 connects pulse transformer L2, pulse transformingDevice L2 connects binding post P6 by the second rectifier bridge, and binding post P5 is connected IGCT (1), triode D28 with binding post P6Base stage and emitter stage between pull down resistor R42 is set, 3 pin of the emitter stage of triode D28 and pulse transformer L2 are connected power supplyVCC, series capacitance C6 between 3 pin of pulse transformer L1 and 1 pin of pulse transformer L2,4 pin of 555 multivibrator U10 connectConnect and the signal output part of door U13 the 4 pin connecting luminous diode LED of 555 multivibrator U10 and the rear ground connection of resistance R 21,5556 pin of multivibrator U10 connect the rear ground connection of capacitor C 9, the 7 pin contact resistance R34 of 555 multivibrator U10 and the public affairs of resistance R 31End altogether, 8 pin of 555 multivibrator U10 connect power supply VCC.
8. novel thyristor switch switching circuit according to claim 7, is characterized in that: 555 described multi-harmonic-oscillations3 pin of device U10 are connected Zener diode D41 with the common port of Zener diode D42, and Zener diode D41 links by resistance R 22The base stage of triode D25, the colelctor electrode of colelctor electrode connecting triode D28 of triode D25 and the common port of pulse transformer L1, threeThe grounded emitter of utmost point pipe D25, arranges pull down resistor R41 between the base stage of triode D25 and emitter stage.
9. novel thyristor switch switching circuit according to claim 7, is characterized in that: described binding post P11 pin connect 1 pin, 1 pin of optocoupler U8 and 1 pin of optocoupler U9 of optocoupler U7,2 pin of binding post P1 are by resistance R 28 and two utmost pointsPipe D38 connects 2 pin of optocoupler U7, and 3 pin of binding post P1 are connected 2 pin of optocoupler U8, wiring with diode D39 by resistance R 294 pin of terminals P 1 are connected 2 pin of optocoupler U9,3 pin of optocoupler U7,3 pin and the optocoupler of optocoupler U8 with diode D40 by resistance R 303 pin of U9 all connect the locked holding circuit of pulse, and 4 pin of optocoupler U7 are connected power supply VCC by resistance R 7 with resistance R 40, resistance R 7With the base stage of the common port connecting triode D49 of resistance R 40, the colelctor electrode of triode D49 is by resistance R 12 ground connection, triode D49Emitter stage connect power supply VCC, the public point D49_C of the colelctor electrode of triode D49 and resistance R 12 is connected with 5 pin of door U13 and believesNumber input, 4 pin of optocoupler U8 are connected power supply VCC by resistance R 8 with resistance R 39, and resistance R 8 is connected with the common port of resistance R 39The base stage of triode D48, the colelctor electrode of triode D48 is by resistance R 10 ground connection, and the emitter stage of triode D48 connects power supply VCC,The public point D48_C of the colelctor electrode of triode D48 and resistance R 10 is connected the 5 pin signal input parts with door U13,4 pin of optocoupler U9Be connected power supply VCC by resistance R 9 with resistance R 38, the base stage of the common port connecting triode D47 of resistance R 9 and resistance R 38, three utmost pointsThe colelctor electrode of pipe D47 is by resistance R 11 ground connection, and the emitter stage of triode D47 connects power supply VCC, the colelctor electrode of triode D47 and electricityThe public point D47_C of resistance R11 connects the 5 pin signal input parts with door U13.
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| CN105896563A (en) * | 2016-05-31 | 2016-08-24 | 廊坊英博电气有限公司 | Zero-crossing trigger control circuit for anti-parallel thyristor split-phase switched capacitor |
| CN108493957A (en) * | 2018-05-17 | 2018-09-04 | 艾博白云电气技术（扬州）有限公司 | A kind of full isolation zero passage equipotential bimodulus quick-switching control circuit |
| CN110690713A (en) * | 2018-07-04 | 2020-01-14 | 北京潞能麒麟电力设备有限公司 | Trigger control method for externally-switched capacitor at corner of thyristor |
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| CN105896563A (en) * | 2016-05-31 | 2016-08-24 | 廊坊英博电气有限公司 | Zero-crossing trigger control circuit for anti-parallel thyristor split-phase switched capacitor |
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| CN110690713B (en) * | 2018-07-04 | 2021-01-29 | 北京潞能麒麟电力设备有限公司 | Trigger control method for externally-switched capacitor at corner of thyristor |
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