CN206460145U - A kind of power frequency continued flow breaking capacity test synthesis loop sync control device - Google Patents
A kind of power frequency continued flow breaking capacity test synthesis loop sync control device Download PDFInfo
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Abstract
The utility model provides a kind of power frequency continued flow breaking capacity test synthesis loop sync control device.Described device includes oscillation frequency loop and the oscillation frequency being sequentially connected starts detection unit, phase-triggered control unit, opto-electronic conversion and igniting unit.The utility model can avoid passing through the delay problem that detection combined floodgate contact or loop current signals are brought, and improve the time control degree of accuracy；The interference of itself loop electromagnetic coupled is reduced, the Conduction Interference intrusion of spatial electromagnetic coupled interference and power supply circuit is prevented effectively from, it is ensured that circuit safety reliability service；It is prevented effectively from because system occurs in the false triggering accident that power frequency startup, the large-current electric magnetic disturbance of impact ignition point and strong electromagnetic pulse Space Coupling are brought, improves the operational reliability and security of system.
Description
Technical field
The utility model is related to power system anti-thunder technical field, specifically a kind of power frequency continued flow breaking capacity test synthesis
Loop synchronisation control device.
Background technology
Long-term research is deployed for the power frequency continued flow breaking capacity test developed country of electric power line arrester, at present
Have been developed that the large-scale experiment device of measurement circuit arrester power frequency continued flow breaking capacity, the integrated lightning impulse of the device and power frequency
Power supply, the actual condition that true simulation hanging net operation leakage conductor is struck by lightning, but its synchronisation control means is by monolithic
Machine or PLC control systems are come control breaker closing separating brake to realize, and cost and equipment occupation space are huge.Need simultaneously
Intrinsic closing time and duration of ignition of opening time and igniter of test breaker etc. are, it is necessary to according to certain respectively
Sequential carry out accurate control and perform just to can ensure that success of the test, test failure rate is higher.Simultaneously as synthesis loop is tested
It is middle to need to synchronize control to the lightning impulse voltage of power frequency high voltage high-current supply and hundreds of kilovolts, during EMC Design
How to avoid by power frequency heavy-current magnetic field and amplitude height, the electromagnetic pulse interference of climbing speed quickly is a key technology,
Often due to such electromagnetic interference causes synchronization control circuit false triggering and causes test failure, or even cause serious equipment event
Barrier and personal injury.
Patent CN101025433A discloses a kind of synthetic test Synchronization Control system for primary cut-out synthetic test
System, its synchronisation control means is, by gathering short circuit current flow, by A/D post-conversion predictive current curves, to predict short circuit current flow
At the zero crossing moment, so as to send Synchronization Control pulse before zero crossing, ignition pill gap is set to puncture action at the time of reservation.Due to
Loop short circuit current flow can not be mutated, and its rising time is ms grades, and control time precision is synchronized by gathering short circuit current flow
It is not accurate enough.System is to control Low-voltage Electronic circuit to carry out data acquisition, calculating by single-chip microcomputer or PLC control system to send same
Control instruction is walked, there is EMC Design difficulty, the shortcomings of function realizes complicated.Under impacting with high pressure effect, Low-voltage Electronic
Control circuit and Control System of Microcomputer are easily interfered and failed.
Domestic manufacturer, which designs a kind of afterflow cut-out test loop being used for external series gap leakage conductor, to be had
Effect carries out leakage conductor operating duty cycle test, and its lightning impulse voltage action time randomly generates, and does not carry out power frequency
Voltage triggered is designed with surge voltage Synchronization Control, it is impossible to which each phase for simulating lightning protection device in power frequency net pressure is hit by thunderbolt
Wear the testing experiment of power frequency continued flow breaking capacity under the conditions of flashover.
The B of patent CN 104267277 disclose over-pressed barrier propterty test device and the control of a kind of over-pressure safety device
Method and system, its synchronisation control means is to trigger power electronic power device by gathering lightning impulse voltage signal, real
The quick input in existing oscillation frequency loop, by oscillation frequency loop and surge voltage loop while to carry out power frequency continued flow
Breaking capacity testing experiment.This method can only simulate over-pressure safety device work by lightning stroke flashover in power-frequency voltage peak value
Condition, it is impossible to simulate the working condition that over-pressure safety device is struck by lightning at power-frequency voltage complete period each phase.
The B of patent CN 104237751 disclose a kind of test device of lightning protection device power frequency continued flow breaking capacity, its synchronization
Control principle is that, using the ball gap distance controlling oscillation frequency loop for adjusting different circuit and the discharging time of impulsive discharge, it has
Have the advantages that it is safe and reliable, simple and easy to apply, do not disturbed by electromagnetic compatible environment, significantly improve success of the test rate.But due to it
Discharge time is controlled using the difference of arcing distance, easily by the factor shadow such as air humidity, atmospheric pressure and electrode shape
Ring, simultaneously because bubble-discharge has certain discreteness and causes lock in time control accuracy inadequate.
Utility model content
The utility model provides a kind of power frequency continued flow breaking capacity test synthesis loop sync control device, can avoid passing through
The delay problem that detection combined floodgate contact or loop current signals are brought, improves the time control degree of accuracy；Reduce itself loop electricity
Magnetic coupling is disturbed, and is prevented effectively from the Conduction Interference intrusion of spatial electromagnetic coupled interference and power supply circuit, it is ensured that circuit safety
Reliability service；It is prevented effectively from because system is empty in power frequency startup, the large-current electric magnetic disturbance of impact ignition point and strong electromagnetic pulse
Between coupling and the false triggering accident brought occurs, improve the operational reliability and security of system.
A kind of power frequency continued flow breaking capacity test synthesis loop sync control device, including oscillation frequency loop and connect successively
The oscillation frequency connect starts detection unit, phase-triggered control unit, opto-electronic conversion and igniting unit, the oscillation frequency loop
Oscillation frequency including being connected in series starts breaker K1, oscillation frequency electric capacity C, oscillation frequency inductance L；
The oscillation frequency starts detection unit and is connected with the output end in oscillation frequency loop, is shaken for that will detect power frequency
Swing the upper first voltage jump rising edge of inductance L and be converted to the logic level signal controlled needed for circuit, and the logic is electric
Ordinary mail number is converted to optical signal, and phase-triggered control unit is sent to by optical fiber；
The phase-triggered control unit, the optical signal for oscillation frequency to be started to detection unit output is converted to logic
High level signal, and holding high level is latched, phase-triggered control unit is on the basis of logic high rising edge, by default
Delay time, export the pulse electrical signal of a fixed pulse width, and be converted to equal with pulse width time light letter
Number, and opto-electronic conversion and igniting unit are sent to by optical fiber；
The opto-electronic conversion and igniting unit, the optical signal for phase-triggered control unit to be exported are converted to one wide
The degree pulse electrical signal equal with the optical signal duration, drive signal, drive amplification isolation are used as by the use of the pulse electrical signal
Circuit produces high-voltage pulse, and high-voltage pulse is acted in surge voltage ignition pill gap, starts surge voltage loop, output impact electricity
Pressure is applied to test product two ends.
Further, the oscillation frequency, which starts detection unit, includes oscillation frequency triggers circuit and electro-optical signal conversion electricity
Road, oscillation frequency triggers circuit includes electric resistance partial pressure device, optocoupler OP1, and electric resistance partial pressure device is parallel to oscillation frequency inductance L's
Two ends, voltage scale on oscillation frequency inductance L is divided into after low-voltage signal by electric resistance partial pressure device drives optocoupler OP1 outputs to trigger
Signal, the trigger signal driving electro-optical signal change-over circuit sends optical signal.
Further, the electric resistance partial pressure device is sequentially connected in series by resistance R1, R2, R3, R4 is formed, and resistance R4 mono- is terminated greatly
Ground is as low-pressure end, and another terminating resistor R3 is used as high-pressure side.
Further, the oscillation frequency triggers circuit 11 also includes the Transient Suppression Diode D1 in parallel with resistance R4,
The high-pressure side of Transient Suppression Diode D1 negative electrode connecting resistance bleeder mechanism, anode connects low-pressure end, Transient Suppression Diode D1's
Negative electrode is connected to optocoupler OP1 light-emitting diodes tube anode, and anode is connected to optocoupler OP1 light-emitting diodes tube cathode, to prevent light
Coupling OP1 primary sides are punctured by backward voltage.
Further, the electro-optical signal change-over circuit include resistance R5, R6, R7, dc source, analog line driver U2,
Light emitting diode U1, analog line driver U2 include NAND gate and triode, optocoupler OP1 output emitter stage with connecing power supply,
Colelctor electrode is inputted after being pulled up through resistance R5 as one of NAND gate in analog line driver U2, and when oscillation frequency starts, this is defeated
Enter and be changed into low level, another input of NAND gate connects dc source, and dc source is connected to light emitting diode U1 by resistance R7
Anode, light emitting diode U1 negative electrode is connected to by resistance R6；The colelctor electrode of triode 122 is connected to resistance R6 in U2
With the common node of light emitting diode U1 negative electrodes, emitter stage with being connected to power supply, when one in U2 input is low level,
Built-in triode ON will be driven, light emitting diode U1 sends optical signal.
Further, the phase-triggered control unit includes the photoelectric signal transformation circuit of concatenation, latched and delay control
Circuit processed, electro-optical signal change-over circuit,
The photoelectric signal transformation circuit includes optical signal and receives head U3, resistance R8, R9, R10, R11, triode Q1, light
The colelctor electrode that signal receives head U3 is pulled to+5V power supplys through resistance R8, is transmitted when receiving oscillation frequency startup detection unit 10
During the optical signal come, U3 exports low level signal to be ended by resistance R9 to triode Q1 base stages, triode Q1, its colelctor electrode
Saltus step is delivered to latch and delay control circuit to high level by resistance R11；
The latch and delay control circuit include high level latch cicuit and delay control circuit, high level latch cicuit
The resistance R11 high level signals transmitted are latched, delay control circuit receives the high level signal being latched, with high electricity
On the basis of flat rising edge, the impulse level signal of a fixed width is exported by a default delay time；
The electro-optical signal change-over circuit is used for the pulse electricity of the fixed width exported according to latch and delay control circuit
The ordinary mail output duration optical signal equal with impulse level signal time width.
Further, the electro-optical signal change-over circuit includes resistance R13, R14, R7, dc source, analog line driver
U4, light emitting diode U5, the latch and delay control circuit output impulse level signal be sent to analog line driver U4 with
One input of NOT gate, another input of NAND gate connects dc source, is always high level signal, dc source passes through resistance
R14 is connected to light emitting diode U5 anode, and light emitting diode U5 negative electrode is connected to by resistance R13；Triode in U4
Colelctor electrode is connected to resistance R13 and light emitting diode U5 negative electrodes common node, and emitter stage is with being connected to power supply.
Further, the opto-electronic conversion and igniting unit include photoelectric signal transformation circuit and igniting unit, the light
Electric signal conversion circuit includes optical signal and receives head U6, resistance R15, resistance R16, resistance R17, electric capacity C3, triode Q2, light letter
Number receive head U6 receive after the optical signal that phase-triggered control unit 20 is sent, colelctor electrode saltus step be low level, low level signal
Triode Q2 base stage is connected to by resistance R16, driving triode Q2 ends, Q2 colelctor electrode saltus step is high level, described
Igniting unit includes resistance R18, R19, R20, storage capacitor C4, metal-oxide-semiconductor Q3, pulse transformer T1, surge voltage ignition pill gap,
The logical high level signal of triode Q2 colelctor electrodes drives metal-oxide-semiconductor Q3 open-minded by resistance R18, service time and the height electricity received
Flat signal duration is equal, storage capacitor C4 primary side windings successively with pulse transformer T1, metal-oxide-semiconductor Q3 drain electrode, metal-oxide-semiconductor
With being connected serially to power supply, pulse transformer T1 secondary side winding high voltage pulses are connected by resistance R20 by Q3 source electrode, current-limiting resistance R19
It is connected to the spray point of surge voltage ignition pill gap.
The utility model has following advantages：
1st, vibration inductive drop signal in oscillation frequency loop is caught by electric resistance partial pressure device and is used as oscillation frequency voltage
Start beginning condition, make use of oscillation frequency in oscillation frequency loop to start the spy that vibration inductive drop is mutated after breaker closing
Point, it is to avoid by detecting the delay problem that combined floodgate contact or loop current signals are brought, improves the time control degree of accuracy.
2nd, oscillation frequency starts detection unit and igniter close to conjunction in power frequency continued flow breaking capacity test synthesis loop
The power device into loop, suffered strong power frequency electromagnet interference and high intensity EMP are done in synthesis loop is tested and started
Disturb the most serious.The utility model can be substantially reduced unit volume and equivalent by way of self-contained battery group is as control power supply
The area of plane, without external power supply circuit, substantially reduces the interference of itself loop electromagnetic coupled, is prevented effectively from spatial electromagnetic coupling
The Conduction Interference for closing interference and power supply circuit is invaded, it is ensured that circuit safety reliability service.
3rd, detection unit, timing control unit and the optical fiber transmission technique performed between igniting unit are substituted in synthesis loop
Cable transmission control circuit, effectively prevent because of system in power frequency startup, impact ignition point large-current electric magnetic disturbance and
Strong electromagnetic pulse Space Coupling and the false triggering accident brought occurs, improve the operational reliability and security of system.
4th, synchronisation control means fully rely on hardware circuit design realization, opto-electronic conversion and level conversion time delay at ns grades,
One complete signal flow time delay is can be controlled within 500ns, it is ensured that oscillation frequency in the test of power frequency continued flow breaking capacity
Voltage all phase control accuracy.
Brief description of the drawings
Fig. 1 is that the utility model power frequency continued flow breaking capacity test synthesis loop sync control device carries out power frequency continued flow screening
The structural representation of cutting capacity experiment；
The schematic block circuit diagram of Fig. 2 the utility model power frequency continued flow breaking capacity test synthesis loop sync control devices；
Oscillation frequency starts the circuit theory diagrams of detection unit in Fig. 3 the utility model；
The circuit theory diagrams of phase-triggered control unit in Fig. 4 the utility model；
The circuit theory diagrams of opto-electronic conversion and igniting unit in Fig. 5 the utility model；
The result of the test figure of Fig. 6 the utility model power frequency continued flow breaking capacity test synthesis loop synchronisation control means.
Embodiment
Below in conjunction with the accompanying drawing in the utility model, the technical scheme in the utility model is carried out clearly and completely
Description.
Refer to Fig. 1, the utility model power frequency continued flow breaking capacity test synthesis loop sync control device one of them
Embodiment includes the oscillation frequency loop being sequentially connected, oscillation frequency startup detection unit 10, phase-triggered control unit 20, light
Electricity conversion and igniting unit 30, the oscillation frequency loop includes the oscillation frequency that is connected in series and starts breaker K1, power frequency shaking
Swing electric capacity C, oscillation frequency inductance L.
Power frequency continued flow breaking capacity test is carried out to test product 40 using the utility model, oscillation frequency startup is closed first disconnected
Road device K1, oscillation frequency loop starts to start.
The oscillation frequency starts detection unit 10 and is connected with the output end in oscillation frequency loop, for that will detect power frequency
The vibration upper first voltage jump rising edge of inductance L is converted to the logic level signal needed for control circuit, and by the logic
Level signal is converted to optical signal, and phase-triggered control unit 20 is sent to by optical fiber；
The phase-triggered control unit 20, the optical signal for oscillation frequency startup detection unit 10 to be exported is converted to
Logic-high signal, and holding high level is latched, phase-triggered control unit 20 is on the basis of logic high rising edge, warp
Default delay time is crossed, the pulse electrical signal of a fixed pulse width is exported, and is converted to equal with pulse width time
Optical signal, and opto-electronic conversion and igniting unit 30 are sent to by optical fiber；
The opto-electronic conversion and igniting unit 30, the optical signal for phase-triggered control unit 20 to be exported are converted to one
The individual width pulse electrical signal equal with the optical signal duration, drive signal, drive amplification are used as by the use of the pulse electrical signal
Isolation circuit produces high-voltage pulse, and high-voltage pulse is acted in surge voltage ignition pill gap 50, starts surge voltage loop, once
Test operation terminates.
Fig. 2 is refer to, the oscillation frequency, which starts detection unit 10, includes the oscillation frequency triggers circuit 11 and electricity of concatenation
Optical signal change-over circuit 12, the phase-triggered control unit 20 includes the photoelectric signal transformation circuit 21 of concatenation, latches and prolong
When control circuit 22, electro-optical signal change-over circuit 23, the photosignal that the opto-electronic conversion and igniting unit 30 include concatenation turns
Change circuit 31 and igniting unit 32.
Fig. 3 show oscillation frequency and starts the circuit theory diagrams of detection unit 10, and oscillation frequency, which starts detection unit 10, to be included
Oscillation frequency triggers circuit 11 and electro-optical signal change-over circuit 12, wherein oscillation frequency triggers circuit 11 are filled including electric resistance partial pressure
Put, Transient Suppression Diode D1, optocoupler OP1, be sequentially connected in series by resistance R1, R2, R3, R4 and form electric resistance partial pressure device, be parallel to
Oscillation frequency inductance L two ends in oscillation frequency loop, the termination the earth of resistance R4 mono- is as low-pressure end, and another terminating resistor R3 makees
For high-pressure side (i.e. the output end of electric resistance partial pressure device), voltage scale on oscillation frequency inductance L is divided into low pressure by resistance R4 to be believed
Number, optocoupler OP1 output trigger signals.Transient Suppression Diode D1 is in parallel with resistance R4, and D1 negative electrode connects high-pressure side, and anode connects
Low-pressure end.D1 negative electrode is connected to optocoupler OP1 light-emitting diodes tube anode, and D1 anodes are connected to OP1 light-emitting diodes tube cathode,
To prevent optocoupler OP1 primary sides from being punctured by backward voltage.
The electro-optical signal change-over circuit 12 includes resistance R5, R6, R7, dc source (such as+5V power supplys), power drive
Device U2, light emitting diode U1, with connecing power supply, colelctor electrode is used as work(to optocoupler OP1 output emitter stage after being pulled up through resistance R5
An input of NAND gate 121 in rate driver U2, when oscillation frequency starts, input (the triggering letter of optocoupler OP1 outputs
Number) it is changed into low level.Another input of NAND gate 121 connects+5V power supplys, is always high level signal.+ 5V power supplys pass through resistance R7
Light emitting diode U1 anode is connected to, light emitting diode U1 negative electrode is connected to by resistance R6；The collection of triode 122 in U2
Electrode is connected to resistance R6 and light emitting diode U1 negative electrodes common node, and emitter stage is with being connected to power supply.As one in U2
When inputting as low level, the built-in triode 122 of driving is turned on, light emitting diode U1 sends optical signal.
The power supply that oscillation frequency starts detection unit 10 is button cell component, and signal delivery lag is in 100ns.
Fig. 4 show the circuit theory diagrams of phase-triggered control unit 20, and the phase-triggered control unit 20 includes concatenation
Photoelectric signal transformation circuit 21, latch and delay control circuit 22, electro-optical signal change-over circuit 23.
The photoelectric signal transformation circuit 21 includes optical signal and receives head U3, resistance R8, R9, R10, R11, triode Q1,
The colelctor electrode that optical signal receives head U3 is pulled to+5V power supplys through resistance R8, is passed when receiving oscillation frequency startup detection unit 10
When passing the optical signal come, U3 exports low level signal to be ended by resistance R9 to triode Q1 base stages, triode Q1, its current collection
Pole saltus step is delivered to latch and delay control circuit 22 to high level by resistance R11, U3 colelctor electrodes and power supply ground it
Between shunt capacitance C1, to filter out high-frequency interferencing signal.
The latch and delay control circuit 22 include high level latch cicuit and delay control circuit, and high level latches electricity
The resistance R11 high level signals transmitted are latched on road, and delay control circuit receives the high level signal being latched, with height
On the basis of level rising edge, the impulse level signal of a fixed width is exported by a default delay time.
The electro-optical signal change-over circuit 23 starts electro-optical signal change-over circuit 12 in detection unit 10 with oscillation frequency
Circuit structure is similar, including resistance R13, R14, R7, dc source (such as+5V power supplys), analog line driver U4, light emitting diode
U5。
The impulse level signal that the latch and delay control circuit 22 are exported is sent to analog line driver U4 NAND gates
One input, another input of NAND gate connects+5V power supplys, is always high level signal.+ 5V power supplys pass through resistance R14 connections
To light emitting diode U5 anode, light emitting diode U5 negative electrode is connected to by resistance R13；The colelctor electrode of triode connects in U4
Resistance R13 and light emitting diode U5 negative electrodes common node are connected to, emitter stage is with being connected to power supply.
Impulse level signal is by triode, triode ON time and arteries and veins built in analog line driver U4 NAND gate driving
Rush level signal time width equal.In current-limiting resistance R14 and analog line driver U4 under the collective effect of triode, luminous two
Pole pipe U5 lights, and its duration is equal with impulse level signal time width.The circuit signal of phase-triggered control unit 20 is passed
Time delay is passed in 200ns.
Fig. 5 show the opto-electronic conversion and the circuit theory diagrams of igniting unit 30, the opto-electronic conversion and igniting unit 30
Including photoelectric signal transformation circuit 31 and igniting unit 32.
The photoelectric signal transformation circuit 31 includes optical signal and receives head U6, resistance R15, resistance R16, resistance R17, electric capacity
C3, triode Q2, optical signal receive head U6 and received after the optical signal that phase-triggered control unit 20 is sent, and colelctor electrode saltus step is low
Level, low level signal is connected to triode Q2 base stage by resistance R16, and driving triode Q2 cut-offs, Q2 colelctor electrode is jumped
It is changed into high level.
The igniting unit 32 includes resistance R18, R19, R20, storage capacitor C4, MOS pipe Q3, pulse transformer T1, punching
Hit voltage ignition pill gap 50.The logical high level signal of Q2 colelctor electrodes drives metal-oxide-semiconductor Q3 open-minded by resistance R18, service time with
The high level signal duration received is equal.Storage capacitor C4 primary side windings successively with pulse transformer T1, metal-oxide-semiconductor Q3
Drain electrode, metal-oxide-semiconductor Q3 source electrode, current-limiting resistance R19 with being connected serially to power supply.Storage capacitor C4 is pre-charged, when metal-oxide-semiconductor Q3 is open-minded
When, the electric charge of storage capacitor C4 storages is released by pulse transformer T1 primary side windings, Q3 drain electrodes and source electrode, current-limiting resistance R19
To power supply, induce high voltage pulse in pulse transformer T1 secondary side winding.Pulse transformer T1 secondary side winding high voltages
Pulse is connected to the spray point of surge voltage ignition pill gap 50 by resistance R20, produces point discharge spark, ignition pill gap air
Be ionized, start surge voltage loop, output surge voltage is applied to the two ends of test product 40 (as shown in Fig. 1).Opto-electronic conversion and point
The fiery circuit signal delivery lag of unit 30 is in 100ns.
The utility model catches vibration inductive drop signal in oscillation frequency loop by electric resistance partial pressure device and is used as power frequency
Oscillating voltage starts beginning condition, make use of oscillation frequency in oscillation frequency loop to vibrate inductive drop after starting breaker closing
The characteristics of mutation, it is to avoid by detecting the delay problem that combined floodgate contact or loop current signals are brought, improve time control
The degree of accuracy.Self-contained battery group as control power supply by way of can reducing unit volume and equivalent plane area, without external
Power supply, substantially reduces the interference of itself loop electromagnetic coupled, is prevented effectively from spatial electromagnetic coupled interference and power supply circuit
Conduction Interference intrusion, it is ensured that circuit safety reliability service.Optical fiber transmission technique between unit instead of cable transmission control
Circuit, effectively prevent because system is in power frequency startup, the large-current electric magnetic disturbance of impact ignition point and strong electromagnetic pulse space
The false triggering accident for coupling and bringing occurs.Synchronisation control means fully relies on hardware circuit design realization, opto-electronic conversion and electricity
Flat turn changes time delay at ns grades, and a complete signal flow time delay is can be controlled within 500ns, it is ensured that power frequency continued flow interdicts energy
Oscillation frequency voltage all phase control accuracy in power test.Fig. 6 is to carry out a kind of circuit using the utility model control method to prevent
The result of thunder device power frequency continued flow breaking capacity test.
It is described above, embodiment only of the present utility model, but protection domain of the present utility model do not limit to
It is any to belong to those skilled in the art in the technical scope that the utility model is disclosed in this, the change that can be readily occurred in
Change or replace, should all cover within protection domain of the present utility model.Therefore, protection domain of the present utility model should be with power
The protection domain that profit is required is defined.
Claims (8)
1. a kind of power frequency continued flow breaking capacity test synthesis loop sync control device, including oscillation frequency loop, the power frequency
The oscillation frequency that oscillation circuit includes being connected in series starts breaker K1, oscillation frequency electric capacity C, oscillation frequency inductance L, its feature
It is：Also include the oscillation frequency that is sequentially connected start detection unit (10), phase-triggered control unit (20), opto-electronic conversion and
Igniting unit (30),
The oscillation frequency starts detection unit (10) and is connected with the output end in oscillation frequency loop, is shaken for that will detect power frequency
Swing the upper first voltage jump rising edge of inductance L and be converted to the logic level signal controlled needed for circuit, and the logic is electric
Ordinary mail number is converted to optical signal, and phase-triggered control unit (20) is sent to by optical fiber；
The phase-triggered control unit (20), the optical signal for oscillation frequency to be started to detection unit (10) output is converted to
Logic-high signal, and latch holding high level, phase-triggered control unit (20) on the basis of logic high rising edge,
By default delay time, the pulse electrical signal of a fixed pulse width is exported, and is converted to and pulse width time phase
Deng optical signal, and opto-electronic conversion and igniting unit (30) are sent to by optical fiber；
The opto-electronic conversion and igniting unit (30), the optical signal for phase-triggered control unit (20) to be exported are converted to one
The individual width pulse electrical signal equal with the optical signal duration, drive signal, drive amplification are used as by the use of the pulse electrical signal
Isolation circuit produces high-voltage pulse, and high-voltage pulse is acted in surge voltage ignition pill gap (50), starts surge voltage loop, defeated
Go out surge voltage and be applied to test product (40) two ends.
2. power frequency continued flow breaking capacity test synthesis loop sync control device as claimed in claim 1, it is characterised in that：Institute
Stating oscillation frequency startup detection unit (10) includes oscillation frequency triggers circuit (11) and electro-optical signal change-over circuit (12), power frequency
Oscillatory trigger circuit (11) includes electric resistance partial pressure device, optocoupler OP1, and electric resistance partial pressure device is parallel to the two of oscillation frequency inductance L
End, voltage scale on oscillation frequency inductance L is divided into after low-voltage signal by electric resistance partial pressure device drives optocoupler OP1 output triggering letters
Number, the trigger signal driving electro-optical signal change-over circuit (12) sends optical signal.
3. power frequency continued flow breaking capacity test synthesis loop sync control device as claimed in claim 2, it is characterised in that：Institute
State electric resistance partial pressure device and be sequentially connected in series by resistance R1, R2, R3, R4 and formed, the termination the earth of resistance R4 mono- is used as low-pressure end, the other end
Connecting resistance R3 is used as high-pressure side.
4. power frequency continued flow breaking capacity test synthesis loop sync control device as claimed in claim 3, it is characterised in that：Institute
Stating oscillation frequency triggers circuit (11) also includes the Transient Suppression Diode D1 in parallel with resistance R4, Transient Suppression Diode D1's
The high-pressure side of negative electrode connecting resistance bleeder mechanism, anode connects low-pressure end, and Transient Suppression Diode D1 negative electrode is connected to optocoupler OP1's
Light-emitting diodes tube anode, anode is connected to optocoupler OP1 light-emitting diodes tube cathode, to prevent optocoupler OP1 primary sides by backward voltage
Puncture.
5. power frequency continued flow breaking capacity test synthesis loop sync control device as claimed in claim 2, it is characterised in that：Institute
Stating electro-optical signal change-over circuit (12) includes resistance R5, R6, R7, dc source, analog line driver U2, light emitting diode U1, work(
Rate driver U2 include NAND gate (121) and triode (122), optocoupler OP1 output emitter stage with connecing power supply, colelctor electrode
An input of NAND gate (121) in analog line driver U2, when oscillation frequency starts, the input are used as after being pulled up through resistance R5
It is changed into low level, another input of NAND gate (121) connects dc source, and dc source is connected to light emitting diode by resistance R7
U1 anode, light emitting diode U1 negative electrode is connected to by resistance R6；The colelctor electrode of triode (122) is connected to resistance in U2
The common node of R6 and light emitting diode U1 negative electrodes, emitter stage with being connected to power supply, when an input in U2 is low level,
The built-in triode (122) of driving is turned on, light emitting diode U1 sends optical signal.
6. power frequency continued flow breaking capacity test synthesis loop sync control device as claimed in claim 1, it is characterised in that：Institute
State phase-triggered control unit (20) include concatenation photoelectric signal transformation circuit (21), latch and delay control circuit (22),
Electro-optical signal change-over circuit (23), the photoelectric signal transformation circuit (21) include optical signal receive head U3, resistance R8, R9,
R10, R11, triode Q1, the colelctor electrode that optical signal receives head U3 are pulled to+5V power supplys through resistance R8, when receiving oscillation frequency
When starting the optical signal that detection unit (10) transmission comes, U3 output low level signals pass through resistance R9 to triode Q1 base stages, three
Pole pipe Q1 ends, its colelctor electrode saltus step to high level, and latch and delay control circuit (22) are delivered to by resistance R11；It is described
Latch and delay control circuit (22) includes high level latch cicuit and delay control circuit, high level latch cicuit is by resistance
The high level signal of R11 transmission is latched, and delay control circuit receives the high level signal being latched, and is risen with high level
On the basis of, the impulse level signal of a fixed width is exported by a default delay time；The electro-optical signal turns
The impulse level signal output for changing fixed width of the circuit (23) for being exported according to latch and delay control circuit (22) continues
The time optical signal equal with impulse level signal time width.
7. power frequency continued flow breaking capacity test synthesis loop sync control device as claimed in claim 6, it is characterised in that：Institute
Stating electro-optical signal change-over circuit (23) includes resistance R13, R14, R7, dc source, analog line driver U4, light emitting diode U5,
The impulse level signal of the latch and delay control circuit (22) output be sent to one of analog line driver U4 NAND gates it is defeated
Enter end, another input of NAND gate connects dc source, is always high level signal, dc source is connected to hair by resistance R14
Optical diode U5 anode, light emitting diode U5 negative electrode is connected to by resistance R13；The colelctor electrode of triode is connected in U4
Resistance R13 and light emitting diode U5 negative electrodes common node, emitter stage is with being connected to power supply.
8. power frequency continued flow breaking capacity test synthesis loop sync control device as claimed in claim 1, it is characterised in that：Institute
Stating opto-electronic conversion and igniting unit (30) includes photoelectric signal transformation circuit (31) and igniting unit (32), and the photosignal turns
Change circuit (31) and receive head U6, resistance R15, resistance R16, resistance R17, electric capacity C3, triode Q2 including optical signal, optical signal connects
Receive head U6 to receive after the optical signal that phase-triggered control unit 20 is sent, colelctor electrode saltus step is low level, low level signal passes through
Resistance R16 is connected to triode Q2 base stage, and driving triode Q2 ends, and Q2 colelctor electrode saltus step is high level, the igniting
Unit (32) includes resistance R18, R19, R20, storage capacitor C4, metal-oxide-semiconductor Q3, pulse transformer T1, surge voltage ignition pill gap
(50), the logical high level signal of triode Q2 colelctor electrodes is open-minded by resistance R18 driving metal-oxide-semiconductors Q3, and service time is with receiving
The high level signal duration it is equal, storage capacitor C4 primary side windings successively with pulse transformer T1, metal-oxide-semiconductor Q3 leakage
With being connected serially to power supply, pulse transformer T1 secondary side winding high voltage pulses pass through electricity by pole, metal-oxide-semiconductor Q3 source electrode, current-limiting resistance R19
Resistance R20 is connected to the spray point of surge voltage ignition pill gap (50).
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| CN106526476A (en) * | 2016-12-21 | 2017-03-22 | 国家电网公司 | Power-flow current breaking capacity test synthetic circuit synchronous control device and method |
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| CN106526476A (en) * | 2016-12-21 | 2017-03-22 | 国家电网公司 | Power-flow current breaking capacity test synthetic circuit synchronous control device and method |
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| CN108037399A (en) * | 2018-02-07 | 2018-05-15 | 国网湖北省电力有限公司电力科学研究院 | 35kV arresters power frequency continued flow breaking capacity test device and method |
| CN108414928A (en) * | 2018-03-29 | 2018-08-17 | 广东电网有限责任公司 | A kind of breaker coil branch wire time detection method and device |
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