CN207730878U - The detection device of dielectric recovery property after a kind of high-voltage sf6 circuit breaker arc - Google Patents
The detection device of dielectric recovery property after a kind of high-voltage sf6 circuit breaker arc Download PDFInfo
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- CN207730878U CN207730878U CN201721304071.6U CN201721304071U CN207730878U CN 207730878 U CN207730878 U CN 207730878U CN 201721304071 U CN201721304071 U CN 201721304071U CN 207730878 U CN207730878 U CN 207730878U
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- 238000002474 experimental method Methods 0.000 claims abstract description 5
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Abstract
The utility model belongs to a kind of detection device of dielectric recovery property after high-voltage technology and high voltage electrical apparatus technical field more particularly to high-voltage sf6 circuit breaker arc.The device includes direct current multiplication of voltage circuit, and dynamic punctures circuit, Control protection system, and testing ＆ measuring system is tested breaker CB, high power laboratory system power supply；It is to be sequentially connected and connect by direct current multiplication of voltage circuit, dynamic breakdown circuit, subject breaker CB and high power laboratory system power supply；Testing ＆ measuring system is connected with dynamic breakdown circuit and subject breaker CB respectively；Control protection system is connected with dynamic breakdown circuit, subject breaker and high power laboratory system power supply respectively.The utility model avoids previous breaker simulation calculation from obtaining and calculates error caused by dielectric recovery property curve, there is generality using the method for its experiment, the accuracy of dielectric recovery property measurement can be increased, improve test measurement efficiency and precision, guarantee test result reliability, have a wide range of application, economic benefit foreground is considerable.
Description
Technical field
The utility model belongs to high-voltage technology and high voltage electrical apparatus technical field more particularly to a kind of high-voltage sf6 circuit breaker
The detection device of dielectric recovery property after arc.
Background technology
High-voltage sf6 circuit breaker post arc restriking phenomenon will produce the switching overvoltage that amplitude is high, frequency is big, endanger power train
The insulation safety for equipment of uniting.Can breaker occur repeated breakdown and depend primarily on after breaker arc between dielectric insulation intensity and contact
More than dielectric insulation intensity re-breakdown phenomenon then occurs for the comparison of transient recovery voltage (TRV), transient recovery voltage.Breaker arc
Afterwards dielectric insulation intensity with open away from or the time change curve then be known as dielectric recovery property.Type approval test is cut-off in breaker
In, only examine breaker under different Breaking capacities, different working conditions, can the TRV curves that provided according to standard cut-off into
Work(does not do standard requirement to dielectric recovery property after arc.Dielectric recovery property is to determine breaker Breaking capacity and can after arc
By the central factor of property, it is the technical chart that breaker production designing unit pays close attention to, directly affects arc-extinguishing chamber of circuit breaker knot
The key links such as structure design, Insulation Coordination, operating mechanism selection.At present both at home and abroad not yet for after high-voltage sf6 circuit breaker arc
The mature technology method of dielectric recovery property detection.
Utility model content
The utility model for the above-mentioned prior art the problem of, be situated between after providing a kind of high-voltage sf6 circuit breaker arc
The detection device of matter recovery characteristics, it is the dielectric recovery property inspection that synthesis loop is cut-off based on high-voltage sf6 circuit breaker large capacity
Survey device.Purpose is to produce designing unit in order to accurately measure dielectric recovery property after breaker arc for breaker and provide design
With reference to providing technical support for breaker operation and maintenance unit.
Technical solution adopted by the utility model to solve its technical problems is：
The detection device of dielectric recovery property after a kind of high-voltage sf6 circuit breaker arc, including direct current multiplication of voltage circuit, dynamic puncture
Circuit, Control protection system, testing ＆ measuring system are tested breaker CB, high power laboratory system power supply；Specifically by direct current times
Road, dynamic breakdown circuit, subject breaker CB and high power laboratory system power supply is pushed back to be sequentially connected and connect；Testing ＆ measuring system point
It is not connected with dynamic breakdown circuit and subject breaker CB；Control protection system is breaking with dynamic breakdown circuit, subject respectively
Device and high power laboratory system power supply are connected.
Direct current multiplication of voltage circuit includes ac step-up transformer T, direct current capacitors C1, direct current capacitors C2, direct current
Container C3 and direct current capacitors C4, high voltage silicon rectifier stack D2, high voltage silicon rectifier stack D3 and high voltage silicon rectifier stack D4；Wherein, ac step-up transformer T high
Pressure side leading-out terminal is connect with the ends of incoming cables direct current capacitors C2, ac step-up transformer T high-pressure side ground terminals and direct current capacitors C1
End of incoming cables is connected with the ends of incoming cables high voltage silicon rectifier stack D1, direct current capacitors C2 leading-out terminals respectively with high voltage silicon rectifier stack D1 leading-out terminals, high pressure silicon
The ends of incoming cables heap D2 are connected with the ends of incoming cables direct current capacitors C4, direct current capacitors C1 leading-out terminals respectively with high voltage silicon rectifier stack D2 leading-out terminals,
The ends of incoming cables high voltage silicon rectifier stack D3 are connected with the ends of incoming cables direct current capacitors C3, and direct current capacitors C4 leading-out terminals go out with high voltage silicon rectifier stack D3 respectively
Line end, the ends of incoming cables high voltage silicon rectifier stack D4, direct current capacitors C3 leading-out terminals respectively with high voltage silicon rectifier stack D4 leading-out terminals, high-tension resistive R inlet wires
End is connected with the ends of incoming cables impulse capacitor C5.
Dynamic breakdown circuit includes impulse capacitor C5, the second impulse capacitor C6, capacitive divider C7, resistance point
Depressor R1, resitstance voltage divider R2, capacitor charging resistor R；Wherein, the end of incoming cables of impulse capacitor C5 and capacitor charging resistor
The ends of incoming cables R, direct current capacitors C3 leading-out terminals, the connection of high voltage silicon rectifier stack D4 leading-out terminals, the leading-out terminal ground connection of impulse capacitor C5, capacitance
Device charging resistor R leading-out terminals and the second ends of incoming cables impulse capacitor C6, the ends of incoming cables the resitstance voltage divider R1 and ends of incoming cables breaker CB1
Connection, the second impulse capacitor C6 leading-out terminals are connect with the ends of incoming cables capacitive divider C7 and oscilloscope signal input terminal, capacitance point
The leading-out terminal of depressor C7 is grounded, and resitstance voltage divider R1 leading-out terminals connect with the ends of incoming cables resitstance voltage divider R2 and oscilloscope signal input terminal
It connects, the leading-out terminal ground connection of resitstance voltage divider R2；Impulse capacitor C5 capacitances are 0.5uF, the second impulse capacitor C6 capacitances
The DC voltage exported with direct current multiplication of voltage circuit for 200pF, impulse capacitor C5, the second impulse capacitor C6 rated operational voltages
Inhibit.
The Control protection system of the circuit includes breaker CB1, breaker CB2 and breaker CB3, current transformer
CT, PLC controlling test unit；Wherein, the ends of incoming cables breaker CB1 and the ends of incoming cables resitstance voltage divider R1, the second impulse capacitor C6
End of incoming cables is connected with high-tension resistive R leading-out terminals, breaker CB1 leading-out terminals and the ends of incoming cables breaker CB2 and Current Transmit into
Line end connects, and breaker CB2 leading-out terminals are connect with the ends of incoming cables breaker CB3, breaker CB3 leading-out terminals and high power laboratory power supply
Connection, Current Transmit leading-out terminal connects with subject breaker CB5 ends of incoming cables, control signal that Current Transmit acquires and
PLC controlling test unit input terminals connect, PLC controlling test units output end respectively with breaker CB1, breaker CB2, open circuit
The operating mechanism control signal input connection of device CB3, subject breaker CB5.
The testing ＆ measuring system, including breaker trip angular displacement sensor CG and high pressure oscilloscope；Wherein, breaker
Stroke angular displacement sensor CG is connect with subject breaker CB5 operating mechanism insulated tension pole shafts, and breaker trip angular displacement passes
Sensor CG output signal lines are connect with high pressure oscilloscope.
The high power laboratory system power supply is the direct power supply of professional laboratory's linked network, mono- using six 220kV/44MVA
Phase study transformer, exportable maximum short-circuit current value are 63kA.
The subject breaker CB is 40.5kV to 800kV high-voltage sf6 circuit breakers.
The advantages of the utility model and effect are：
1, dielectric recovery property curve after high-voltage sf6 circuit breaker arc is directly measured, previous breaker is avoided to emulate
It is calculated and calculates error caused by dielectric recovery property curve.
2, dielectric recovery property detects after carrying out high-voltage sf6 circuit breaker arc using the present apparatus, can be held according to pilot system
Amount is commonly applied to 40.5kV-1100kV voltage class breakers, has generality using the method for its experiment.
3, using the charge-discharge principle of impulse capacitor, breakdown can be adjusted by controlling capacitor charging/discharging time constant
Voltage sampling site frequency increases the accuracy that dielectric recovery property measures.
4, using the method for numerical analysis to difference open away from breakdown voltage analyze, provide dielectric recovery property song
Line improves test measurement efficiency and precision.
5, the automatic decision analysis for realizing test measurement result, proposes breakdown point voltage after problematic arc and opens away from value,
Guarantee test result reliability.
6, the device can extensive use, considerable benefit.
Description of the drawings
In the following with reference to the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is Tthe utility model system structural schematic diagram；
Fig. 2 is dielectric recovery property circuit structure principle schematic after the utility model breaker arc；
Fig. 3 is Tthe utility model system output voltage waveform；
Fig. 4 is the utility model dielectric recovery property test result and matched curve figure.
In figure：Direct current multiplication of voltage circuit 1, dynamic puncture circuit 2, Control protection system 3, testing ＆ measuring system 4, subject open circuit
Device CB5, high power laboratory system power supply 6, PLC controlling tests unit 7, high pressure oscilloscope 8, ac step-up transformer T, direct current
Container C1, direct current capacitors C2, direct current capacitors C3, direct current capacitors C4, high voltage silicon rectifier stack D1, high voltage silicon rectifier stack D2, high voltage silicon rectifier stack
D3, high voltage silicon rectifier stack D4, impulse capacitor C5, the second impulse capacitor C6, capacitive divider C7, resitstance voltage divider R1, resistance point
Depressor R2, capacitor charging resistor R, breaker CB1, breaker CB2, breaker CB3, Current Transmit, breaker trip
Angular displacement sensor CG.
Specific implementation mode
The utility model is a kind of detection device of dielectric recovery property after high-voltage sf6 circuit breaker arc, including direct current multiplication of voltage
Circuit 1, dynamic puncture circuit 2, Control protection system 3, and testing ＆ measuring system 4 is tested breaker CB5, high power laboratory system
Power supply 6.Specifically by direct current multiplication of voltage circuit 1, dynamic breakdown circuit 2, subject breaker CB5 and high power laboratory system power supply 6
It is sequentially connected and connects；Testing ＆ measuring system 4 is connected with dynamic breakdown circuit 2 and subject breaker CB5 respectively；Control protection system
3 are connected with dynamic breakdown circuit 2, subject breaker 5 and high power laboratory system power supply 6 respectively.
Direct current multiplication of voltage circuit 1 includes ac step-up transformer T, direct current capacitors C1, direct current capacitors C2, direct current
Container C3 and direct current capacitors C4, high voltage silicon rectifier stack D1, high voltage silicon rectifier stack D2, high voltage silicon rectifier stack D3 and high voltage silicon rectifier stack D4.Wherein, exchange rises
Pressure transformer T high-voltage side outlet wires end is connect with the ends of incoming cables direct current capacitors C2, ac step-up transformer T high-pressure side ground terminals with it is straight
The galvanic electricity ends of incoming cables container C1 are connected with the ends of incoming cables high voltage silicon rectifier stack D1, direct current capacitors C2 leading-out terminals respectively with high voltage silicon rectifier stack D1 outlets
End, the ends of incoming cables high voltage silicon rectifier stack D2 connected with the ends of incoming cables direct current capacitors C4, direct current capacitors C1 leading-out terminals respectively with high voltage silicon rectifier stack
D2 leading-out terminals, the ends of incoming cables high voltage silicon rectifier stack D3 are connected with the ends of incoming cables direct current capacitors C3, direct current capacitors C4 leading-out terminals respectively with height
Press silicon stack D3 leading-out terminals, the ends of incoming cables high voltage silicon rectifier stack D4, direct current capacitors C3 leading-out terminals respectively with high voltage silicon rectifier stack D4 leading-out terminals, high pressure
The ends of incoming cables resistance R are connected with the ends of incoming cables impulse capacitor C5, as shown in Figure 2.It mainly will by ac step-up transformer T
AC220V voltages rise between AC50kV to AC250kV, can be according to tune quilt since the voltage class of subject breaker CB5 is different
Transient recovery voltage peaks demand multiple pushes back road serial capacitance device and high voltage silicon rectifier stack number after examination breaker arc, by booster electricity
Repoussage rheology is changed to suitable DC voltage U.Design parameter is as shown in table 1.
The dynamic breakdown circuit 2 of the circuit includes impulse capacitor C5, the second impulse capacitor C6, capacitive divider C7,
Resitstance voltage divider R1, resitstance voltage divider R2, capacitor charging resistor R.Wherein, the end of incoming cables of impulse capacitor C5 is filled with capacitor
The ends of incoming cables resistance R, direct current capacitors C3 leading-out terminals, the connection of high voltage silicon rectifier stack D4 leading-out terminals, the outlet termination of impulse capacitor C5
Ground, capacitor charging resistor R leading-out terminals and the second ends of incoming cables impulse capacitor C6, the ends of incoming cables resitstance voltage divider R1 and breaker
The ends of incoming cables CB1 connect, and the second impulse capacitor C6 leading-out terminals connect with the ends of incoming cables capacitive divider C7 and 8 signal input part of oscillograph
It connects, the leading-out terminal ground connection of capacitive divider C7, resitstance voltage divider R1 leading-out terminals are believed with the ends of incoming cables resitstance voltage divider R2 and oscillograph 8
The connection of number input terminal, the leading-out terminal ground connection of resitstance voltage divider R2.Impulse capacitor C5 capacitances are 0.5uF, the second pulsed capacitance
Device C6 capacitances are 200pF, and impulse capacitor C5, the second impulse capacitor C6 rated operational voltages and direct current multiplication of voltage circuit 1 are defeated
The DC voltage gone out inhibits, as shown in table 1.Capacitive divider C7, resitstance voltage divider R1 and resitstance voltage divider R2 can be according to direct currents
Voltage suitably selects.The charging time that C5 couples of the second impulse capacitor C6 of impulse capacitor is adjusted in capacitor charging resistor R is normal
Number, so as to adjust the time interval of dynamic breakdown potential pressure point.According to test requirements document and data acquiring frequency requirement, resistance can be set
Value is respectively：0.5MΩ、1MΩ、1.5MΩ.Impulse capacitor C5 is carried out by direct current multiplication of voltage circuit 1 to charge to specified electricity
Pressure, impulse capacitor C5 are charged by R couples of the second impulse capacitor C6 of capacitor charging resistor into Mobile state.
The Control protection system 3 of the circuit include breaker CB1, breaker CB2 and breaker CB3, Current Transmit,
PLC controlling tests unit 7.Wherein, the ends of incoming cables breaker CB1 and the ends of incoming cables resitstance voltage divider R1, the second impulse capacitor C6 into
Line end is connected with high-tension resistive R leading-out terminals, breaker CB1 leading-out terminals and the ends of incoming cables breaker CB2 and Current Transmit inlet wire
End connection, breaker CB2 leading-out terminals are connect with the ends of incoming cables breaker CB3, and breaker CB3 leading-out terminals connect with high power laboratory power supply
Connect, Current Transmit leading-out terminal connect with subject breaker CB5 ends of incoming cables, the control signal of Current Transmit acquisition and
7 input terminal of PLC controlling tests unit connects, 7 output end of PLC controlling tests unit respectively with breaker CB1, breaker CB2, disconnected
The operating mechanism control signal input connection of road device CB3, subject breaker CB5, as shown in Figure 2.By detecting Current Mutual Inductance
The current signal of device CT, judge circuit breaker arc zero passage whether blow-out, to control breaker CB1, breaker CB2 and breaker
The breaking-closing operating of CB3.
The testing ＆ measuring system 4, including breaker trip angular displacement sensor CG and high pressure oscilloscope 8.Wherein, break
Road device stroke angular displacement sensor CG is connect with subject breaker CB5 operating mechanism insulated tension pole shafts, breaker trip angle position
Displacement sensor CG output signal lines are connect with high pressure oscilloscope 8.The voltage signal of capacitive divider is detected by high pressure oscilloscope,
Voltage value after moment record subject breaker blow-out between fracture；Believed by the voltage of high pressure oscilloscope detection resistance divider
Number, the moment records the DC voltage value of direct current multiplication of voltage circuit output；Subject breaker operation mechanism is detected by high pressure oscilloscope
Angular displacement signal in shaft, the stroke signal of moment record subject breaker.
The high power laboratory system power supply 6 is the direct power supply of professional laboratory's linked network, mono- using six 220kV/44MVA
Phase study transformer, exportable maximum short-circuit current value are 63kA.
The subject breaker CB5 can be 40.5kV to 800kV high-voltage sf6 circuit breakers.
The utility model is implemented by following technical solution：
As depicted in figs. 1 and 2, Fig. 1 is Tthe utility model system structural schematic diagram, and Fig. 2 is the utility model breaker arc
Dielectric recovery property circuit structure principle schematic afterwards.Dynamic is punctured by ac step-up transformer T and direct current multiplication of voltage circuit
Impulse capacitor C5 in circuit charge to rated voltage, and C5 couples of the second impulse capacitor C6 of impulse capacitor is into Mobile state
Charging, the second impulse capacitor C6 is in parallel with subject breaker fracture, and dielectric insulation intensity is less than the second pulsed capacitance after arc
The second impulse capacitor C6 is to breaker fracture gap discharge when device C6 charging voltages, and as fracture spacing increases, record is different
The dielectric breakdown voltage value away under is opened, until spacing is sufficiently large, the second impulse capacitor C6 charging voltages are not enough to breakdown fracture
Between until medium.High power laboratory system power supply 6 provides the electric current of 10A to 63kA for subject breaker, can adjust difference and open
Flow valuve is powered off, detection difference cut-offs dielectric recovery property curve after the arc under arcing.By being engraved when testing ＆ measuring system 4
Record breaker trip and fracture voltage signal.As shown in figure 3, Fig. 3 is Tthe utility model system output voltage waveform.Extraction is not
With opening the breakdown voltage value away under, dielectric recovery property curve after arc is provided by numerical analysis, as shown in figure 4, Fig. 4 is this reality
With novel medium recovery characteristics test result and matched curve figure.
The utility model measures dielectric recovery property curve after arc, concrete operations flow so that 126kV is tested breaker as an example
It is as follows：
A. subject breaker CB is in closed state, and breaker CB1 is disconnected, and breaker CB2 is disconnected, and breaker CB3 is closed.
B. ac step-up transformer T low-pressure side AC220V power supplys are connected, ac step-up transformer T high side voltages are adjusted
To 100kV, by direct current capacitors C1, direct current capacitors C2, direct current capacitors C3, direct current capacitors C4 and high voltage silicon rectifier stack D1,
The direct current multiplication of voltage circuit that high voltage silicon rectifier stack D2, high voltage silicon rectifier stack D3, high voltage silicon rectifier stack D4 are formed adjusts voltage to DC400kV, passes through electricity
The voltage signal for hindering divider R1 and resitstance voltage divider R2 acquisitions detects direct current multiplication of voltage output voltage loop value, prevents overtension
Damage equipment.
C. impulse capacitor C5 (0.5uF) is carried out charging to rated operational voltage DC400kV by direct current multiplication of voltage circuit,
Ac step-up transformer T power supplys are disconnected after charging complete.
D. the current value of 10A to 63kA is provided by high power laboratory system power supply, this selection provides 10kA current values.
It is expected to test by high power laboratory system, detects current waveform amplitude and whether frequency meets the requirements, setting electric current cut-offs phase
Position adjusts the arc time.
E. breaker CB2 closing operations are controlled by PLC controlling tests unit 7, is detected at this time by Current Transmit
Current waveform, subject breaker CB carry out sub-switching operation after detecting short circuit current, exist between fracture and cut-off electric arc.
F. the current waveform detected by Current Transmit judges that being tested breaker CB cut-offs whether electric arc extinguishes, and determines
After arc extinction, breaker CB3 sub-switching operations, breaker CB1 closing operations are controlled by controlling test unit.
G. the moment that breaker CB1 closes a floodgate is less than since subject breaker CB arcing contact gap dielectric dielectric strengths are relatively low
The second impulse capacitor C6 voltage in parallel with fracture gap, fracture medium is breakdown, the second impulse capacitor C6 electric discharges.
H. after the second impulse capacitor C6 electric discharges, C5 couples of the second impulse capacitor C6 of impulse capacitor charges, at this time
Fracture spacing increases, and dielectric insulation intensity is further restored.Between the second impulse capacitor C6 charging voltages are more than fracture again
When dielectric insulation intensity, fracture medium is breakdown again, and the second impulse capacitor C6 discharges again.
I. subject breaker fracture spacing increases therewith, occurs repeatedly the second impulse capacitor C6 chargings, discharge process, directly
Sufficiently large to fracture spacing, dielectric insulation intensity is restored to the second impulse capacitor C6 charging voltages and is not enough to puncture between arcing contact
Until.
J. capacitive divider C7 and breaker trip angular displacement sensor CG signals are acquired by high pressure oscilloscope, records quilt
It is different after examination breaker blow-out to open breakdown voltage and breaker arcing contact stroke waveform away under, as shown in Figure 3.
K. comparison breaker arcing contact stroke and fracture gap voltage curve, extraction each time dielectric breakdown process open away from
Value and breakdown voltage value.
L. by 10 test statistics, ten groups of data, Applying Numercal Analysis Method Assess handles data, removes unusual hit
Wear the reliability for a little ensureing data.Data fitting is carried out to experiment breakdown voltage value, provides dielectric recovery property curve, such as Fig. 4
It is shown.
M. by changing direct current multiplication of voltage output voltage loop polarity, subject breaker drop-out current amplitude and phase angle, open circuit
Device cut-offs the experimental conditions such as speed, arc-chutes SF6 gas inflated pressure, detects the dielectric recovery property curve under different operating modes.
Table 1：Direct current multiplication of voltage loop element parameter list.
| Voltage class/kV | TRV peak values/kV | DC voltage U/kV | Transformer parameter | Capacitor and silicon stack number n | Capacitor parameters | Silicon stack rated voltage |
| 40.5 | 74.5 | 100 | 220V/50kV | 2 | 0.1uF/DC100kV | DC100kV |
| 72.5 | 133 | 200 | 220V/50kV | 4 | 0.1uF/DC100kV | DC100kV |
| 126 | 322 | 400 | 220V/100kV | 4 | 0.1uF/DC200kV | DC200kV |
| 252 | 514 | 800 | 220V/200kV | 4 | 0.1uF/DC400kV | DC400kV |
| 363 | 741 | 1000 | 220V/250kV | 4 | 0.1uF/DC500kV | DC500kV |
| 550 | 1123 | 1500 | 220V/250kV | 6 | 0.1uF/DC500kV | DC500kV |
| 800 | 1633 | 2000 | 220V/500kV | 4 | 0.1uF/DC1000kV | DC1000kV |
Claims (7)
1. the detection device of dielectric recovery property after a kind of high-voltage sf6 circuit breaker arc, it is characterized in that：Including direct current multiplication of voltage circuit
（1）, dynamic breakdown circuit（2）, Control protection system（3）, testing ＆ measuring system（4）, subject breaker CB（5）, large capacity examination
Check system power supply（6）；Specifically by direct current multiplication of voltage circuit（1）, dynamic breakdown circuit（2）, subject breaker CB（5）And large capacity
Pilot system power supply（6）It is sequentially connected and connects；Testing ＆ measuring system（4）Puncture circuit with dynamic respectively（2）With subject breaker CB
（5）It is connected；Control protection system（3）Puncture circuit with dynamic respectively（2）, subject breaker（5）And high power laboratory system
Power supply（6）It is connected.
2. the detection device of dielectric recovery property, feature after a kind of high-voltage sf6 circuit breaker arc according to claim 1
It is：Direct current multiplication of voltage circuit（1）Including ac step-up transformer T, direct current capacitors C1, direct current capacitors C2, DC capacitor
Device C3 and direct current capacitors C4, high voltage silicon rectifier stack D2, high voltage silicon rectifier stack D3 and high voltage silicon rectifier stack D4；Wherein, ac step-up transformer T high pressures
Side leading-out terminal is connect with the ends of incoming cables direct current capacitors C2, ac step-up transformer T high-pressure side ground terminals and direct current capacitors C1 into
Line end is connected with the ends of incoming cables high voltage silicon rectifier stack D1, direct current capacitors C2 leading-out terminals respectively with high voltage silicon rectifier stack D1 leading-out terminals, high voltage silicon rectifier stack
The ends of incoming cables D2 are connected with the ends of incoming cables direct current capacitors C4, direct current capacitors C1 leading-out terminals respectively with high voltage silicon rectifier stack D2 leading-out terminals, height
Pressure the ends of incoming cables silicon stack D3 connected with the ends of incoming cables direct current capacitors C3, direct current capacitors C4 leading-out terminals respectively with high voltage silicon rectifier stack D3 outlets
End, the ends of incoming cables high voltage silicon rectifier stack D4, direct current capacitors C3 leading-out terminals respectively with high voltage silicon rectifier stack D4 leading-out terminals, the ends of incoming cables high-tension resistive R
It is connected with the ends of incoming cables impulse capacitor C5.
3. the detection device of dielectric recovery property, feature after a kind of high-voltage sf6 circuit breaker arc according to claim 1
It is：The dynamic punctures circuit（2）Including impulse capacitor C5, the second impulse capacitor C6, capacitive divider C7, electric resistance partial pressure
Device R1, resitstance voltage divider R2, capacitor charging resistor R；Wherein, the end of incoming cables of impulse capacitor C5 and capacitor charging resistor R
End of incoming cables, direct current capacitors C3 leading-out terminals, the connection of high voltage silicon rectifier stack D4 leading-out terminals, the leading-out terminal ground connection of impulse capacitor C5, capacitance
Device charging resistor R leading-out terminals and the second ends of incoming cables impulse capacitor C6, the ends of incoming cables the resitstance voltage divider R1 and ends of incoming cables breaker CB1
Connection, the second impulse capacitor C6 leading-out terminals and the ends of incoming cables capacitive divider C7 and oscillograph（8）Signal input part connects, capacitance
The leading-out terminal of divider C7 is grounded, resitstance voltage divider R1 leading-out terminals and the ends of incoming cables resitstance voltage divider R2 and oscillograph（8）Signal is defeated
Enter end connection, the leading-out terminal ground connection of resitstance voltage divider R2；Impulse capacitor C5 capacitances are 0.5uF, the second impulse capacitor C6
Capacitance is 200pF, impulse capacitor C5, the second impulse capacitor C6 rated operational voltages and direct current multiplication of voltage circuit（1）Output
DC voltage inhibit.
4. the detection device of dielectric recovery property, feature after a kind of high-voltage sf6 circuit breaker arc according to claim 1
It is：The Control protection system（3）Including breaker CB1, breaker CB2 and breaker CB3, Current Transmit, PLC experiments
Control unit（7）；Wherein, the ends of incoming cables breaker CB1 and the ends of incoming cables resitstance voltage divider R1, the second ends of incoming cables impulse capacitor C6 and
High-tension resistive R leading-out terminals connect, and breaker CB1 leading-out terminals are connect with the ends of incoming cables breaker CB2 and Current Transmit end of incoming cables,
Breaker CB2 leading-out terminals are connect with the ends of incoming cables breaker CB3, and breaker CB3 leading-out terminals are connect with high power laboratory power supply, electric current
Mutual inductor CT leading-out terminals are connect with the ends of incoming cables subject breaker CB5, and control signal and the PLC experiments of Current Transmit acquisition are controlled
Unit processed（7）Input terminal connects, PLC controlling test units（7）Output end respectively with breaker CB1, breaker CB2, breaker
The operating mechanism control signal input connection of CB3, subject breaker CB5.
5. the detection device of dielectric recovery property, feature after a kind of high-voltage sf6 circuit breaker arc according to claim 1
It is：The testing ＆ measuring system（4）, including breaker trip angular displacement sensor CG and high pressure oscilloscope（8）；Wherein, breaking
Device stroke angular displacement sensor CG is connect with subject breaker CB5 operating mechanism insulated tension pole shafts, breaker trip angular displacement
Sensor CG output signal lines and high pressure oscilloscope（8）Connection.
6. the detection device of dielectric recovery property, feature after a kind of high-voltage sf6 circuit breaker arc according to claim 1
It is：The high power laboratory system power supply（6）It is single-phase using six 220kV/44MVA for the professional direct power supply of laboratory's linked network
Testing transformer, exportable maximum short-circuit current value are 63kA.
7. the detection device of dielectric recovery property, feature after a kind of high-voltage sf6 circuit breaker arc according to claim 1
It is：The subject breaker CB（5）For 40.5kV to 800kV high-voltage sf6 circuit breakers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN107797034A (en) * | 2017-10-11 | 2018-03-13 | 国网辽宁省电力有限公司电力科学研究院 | The detection means and method of dielectric recovery property after a kind of high-voltage sf6 circuit breaker arc |
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