CN209690451U - A kind of oscillation wave detection reactor insulation status circuit - Google Patents
A kind of oscillation wave detection reactor insulation status circuit Download PDFInfo
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- CN209690451U CN209690451U CN201822146500.2U CN201822146500U CN209690451U CN 209690451 U CN209690451 U CN 209690451U CN 201822146500 U CN201822146500 U CN 201822146500U CN 209690451 U CN209690451 U CN 209690451U
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- reactor
- control switch
- voltage
- partial discharge
- detection
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Abstract
The utility model relates to a kind of oscillation waves to detect reactor insulation status circuit.Current methods cannot put capable detection into the pressure-resistant drawn game of reactor simultaneously.The utility model includes high-voltage DC power supply, charging control switch, vibrational control switch, is tested reactor, without partial discharge coupling capacitor, voltmeter, detection impedance and Partial discharge detector.High-voltage DC power supply anode connects charging control switch one end, the charging control switch other end and vibrational control switch one terminate tested reactor, no partial discharge coupling capacitor and the voltmeter latter other end for terminating tested reactor in parallel, the signal input part of another termination detection impedance after in parallel.The utility model carries out pressure-resistant condition detection using the tested reactor oscillation circuit to be formed of connecting with no partial discharge coupling capacitor, and the shelf depreciation situation of reactor is finally tested according to the waveform judgement that Partial discharge detector is passed in detection impedance back.The utility model can meet the detection of the reactor insulation status under different voltages grade.
Description
Technical field
The utility model belongs to technical field of electric power detection, is related to a kind of oscillation wave detection reactor insulation status circuit.
Background technique
Main component of the shunt reactor as power grid transformer equipment, safety and stability directly affect the safety of power grid.And
Most of the accident of connection reactor is that the insulating oil due to caused by its internal shelf depreciation, fever persistently deteriorates, insulating element damages
Caused by bad.To the detection of reactor insulation status based on pressure resistance and Partial Discharge Detection.
Reactor partial discharge detection mainly uses AC power source pressure build-up technique at present.As shown in Figure 1, this kind of detection method passes through
Pressure regulator T1 and testing transformer T2 boosts to predeterminated voltage to the AC power source AC of input steadily；Pass through no partial discharge coupling capacitor
C, the acquisition of detection impedance Z are transmitted to Partial discharge detector J, and Partial discharge detector J calculates detection data, analyzes
Obtain the shelf depreciation information of tested reactor L.This kind of mode uses AC power source persistent pressure, to experiment power supply require compared with
The disadvantages of height, it is big that there are capacity of experiment, and required rig for testing is complicated, and power source loads power is big.
The method of measurement reactor pressure resistance situation generally utilizes the breakdown conducting of mechanical switch (ball gap method) moment to generate oscillation
The method in wave circuit, such as machinery industry standard JB/T 10775-2007.As shown in Fig. 2, test process passes through pressure regulator AT, examination
It tests transformer TC and capacitor C is first charged into test voltage, then close ball gap Q until puncturing, capacitor C and tested electricity
Anti- device Lx forms serial oscillation circuit, and the breakdown voltage of ball gap Q is exactly the charging voltage of capacitor C, i.e., tested reactor Lx two
The test voltage at end.This method mainly utilizes mechanical switch (change ball stand-off distance from) to complete transient switching process, the method
Overshoot voltage can be generated in the breakdown of ball gap, reactor is caused to impact, but tested reactor itself after overbump report
Useless device, the meaning without detection.In addition, this method is measured just for the pressure resistance of reactor, reactor partial discharge is not provided
How judgement is measured.
Summary of the invention
The purpose of this utility model provides a kind of oscillation wave detection reactor insulation shape aiming at the deficiencies in the prior art
Condition circuit simultaneously detects the pressure resistance of reactor and shelf depreciation using the circuit.
The utility model includes high-voltage DC power supply, charging control switch, vibrational control switch, is tested reactor, without office
Put coupling capacitor, voltmeter, detection impedance and Partial discharge detector.
The high-voltage DC power supply anode connects one end of charging control switch, the other end of charging control switch and oscillation
The one of control switch terminates one end of tested reactor, the tested electricity of a termination after no partial discharge coupling capacitor and voltmeter parallel connection
The other end of anti-device, the signal input part of another termination detection impedance after parallel connection；Cathode, the vibrational control of high-voltage DC power supply
The other end of switch is grounded, and Partial discharge detector connects the signal output end of detection impedance, detects the ground terminal ground connection of impedance.
The detection impedance includes magnetic core, and two groups of coils are cased on magnetic core, respectively as primary inductor L 1 and secondary side electricity
Feel L2；One end after primary inductor L 1, resistance R1, distribution capacity C are in parallel is as signal input part, another termination ground terminal；It is secondary
One end after side inductance L2, resistance R2 are in parallel is as signal output end, another termination ground terminal.
Further, the output voltage of the high-voltage DC power supply is 300V~60KV, output voltage and frequency and is tested
The voltage class of reactor matches.
Further, the charging control switch and vibrational control switch be solid electronic switch, charging control switch and
Vibrational control switch specification with high-voltage DC power supply voltage matches.
Further, the no partial discharge coupling capacitor and tested reactor voltage ratings match, detection impedance meet vibration
The coupling capacitor capacitance size swung in circuit is detecting in impedance-tumed capacitance range.
Further, the Partial discharge detector has signal acquisition, Digital Signal Processing and image display analysis
Function.
The utility model is detected to reactor insulation status, is filled using DC high-voltage power supply to tested reactor
Electricity replaces original ball gap using solid high voltage electronic switch, and in switch conduction, no-voltage is overshooted；And using tested reactor with
The connect oscillation circuit to be formed of no partial discharge coupling capacitor carries out pressure-resistant condition detection, finally passes part back according to detection impedance and puts
The waveform of electro-detection instrument judges the shelf depreciation situation of tested reactor.
When carrying out reactor pressure test, according to subject reactor voltage parameter, corresponding DC power supply is selected to carry out
The pressure voltage to be examined is boosted to, if the waveform that detecting instrument is shown is normal oscillation wave, reactor pressure resistance is qualified, if rising
It is pressed onto the pressure voltage to be examined, display waveform generation obviously falls mutation, then reactor pressure resistance is unqualified.
When carrying out reactor local discharge test, only high-voltage switch gear need to be closed in the case where solid high voltage electronic switch disconnects
It charges to reactor, finishes disconnection high-voltage switch gear to reactor charging, close solid electronic switch, make reactor and capacitor structure
At closed oscillator, the waveform generated by lc circuit self-oscillation can determine whether reactor with the presence or absence of partial discharge failure.
Using the utility model detecting to reactor insulation status, it is not necessarily to measure loop continued power, simply
It is easy, conventional reactor partial discharge and pressure-resistant condition detection mode are changed, while solving voltage mistake in JB/T 10775-2007
The problem of rushing；And oscillation circuit power source loads power is small, detection voltage is easy to control, can meet the reactance under different voltages grade
The detection of device insulation status；Greatly reduce quantity, the power of testing equipment under the premise of meeting test requirements document, solves well
Under AC power source of having determined pressuring method reactor insulation status detection there are the problem of.
Detailed description of the invention
Fig. 1 is existing reactor detection circuit for partial discharge schematic diagram；
Fig. 2 is that JB/T 10775-2007 detects reactor pressure resistance schematic diagram；
Fig. 3 is the circuit diagram of the utility model；
Fig. 4 is the circuit diagram that impedance is detected in Fig. 3；
Fig. 5 is the abnormal waveform diagram of pressure resistance；
Fig. 6 is that pressure resistance is normal but there are partial discharge damped oscillation waveform figures；
Fig. 7 is that pressure resistance is normal and there is no partial discharge damped oscillation waveform figures.
Specific embodiment
As shown in figure 3, a kind of oscillation wave detects reactor insulation status circuit, including high-voltage DC power supply 1, charge control
Switch 2, vibrational control switch 3 are tested reactor 4, without partial discharge coupling capacitor 5, voltmeter 6, detection impedance 7 and shelf depreciation
Detector 8.
1 anode of high-voltage DC power supply connects one end of charging control switch 2, the other end of charging control switch 2 and oscillation control
The one of switch 3 one end for terminating tested reactor 4 is made, the termination after 6 parallel connection of no partial discharge coupling capacitor 5 and voltmeter is tested
The other end of reactor 4, the signal input part of another termination detection impedance 7 after parallel connection；The cathode of high-voltage DC power supply 1, vibration
The other end ground connection of control switch 3 is swung, Partial discharge detector 8 connects the signal output end of detection impedance 7, and detection impedance 7 connects
Ground terminal ground connection.
As shown in figure 4, detection impedance 7 includes magnetic core, two groups of coils are cased on magnetic core, respectively as primary inductor L 1 and pair
Side inductance L2；One end after primary inductor L 1, resistance R1, distribution capacity C are in parallel is as signal input part, another termination ground connection
End；One end after secondary inductance L2, resistance R2 are in parallel is as signal output end, another termination ground terminal.
Wherein, the output voltage of high-voltage DC power supply 1 is 300V~60KV, output voltage and frequency and tested reactor 4
Voltage class match；Charging control switch 2 and vibrational control switch 3 are solid electronic switch, charging control switch 2 and vibration
Swing 3 specification of control switch with 1 voltage matches of high-voltage DC power supply；Without partial discharge coupling capacitor 5 and tested 4 voltage of reactor
Ratings match, detection impedance 7 meet the coupling capacitor capacitance size in oscillation circuit and are detecting impedance-tumed capacitance range
It is interior；Partial discharge detector 8 has signal acquisition, and Digital Signal Processing and image show analytic function.
The specific detection method is as follows:
By tested 4 detection circuit for access of reactor, vibrational control switch 3 is disconnected first, then charging control switch 2 is closed
It closes, 1 pair of high-voltage DC power supply charges to predeterminated voltage without partial discharge coupling capacitor 5；
Without partial discharge coupling capacitor 5 it is fully charged after, when 6 numerical value of voltmeter reaches 1 voltage output value of high-voltage DC power supply, will
Charging control switch 2 disconnects, then vibrational control switch 3 is closed, and is tested reactor 4 and is formed without partial discharge coupling capacitor 5 and is gone here and there
Join oscillation circuit, be tested the high pressure damped oscillation for generating transient state on reactor 4, is received by Partial discharge detector 8, place
Reason, the display detection collected oscillation wave signal of impedance 7, finally show damped oscillation wave profile in Partial discharge detector 8:
The oscillation wave waveform of such as damped oscillation wave profile be one at voltage peak exist fall mutation, then judge quilt
It surveys reactor 4 and is not up to pressure voltage, it is unqualified (as shown in Figure 5) to be tested 4 insulation status of reactor；Such as damped oscillation wave profile
It is a complete damped oscillation wave profile, then judges that tested reactor 4 reaches pressure voltage, continue Partial Discharge Detection:
The oscillation wave waveform of such as damped oscillation wave profile is the damped oscillation wave profile for having pulse signal, then judges
There are shelf depreciations for tested reactor 4, and it is unqualified (as shown in Figure 6) to be tested 4 insulation status of reactor；
The oscillation wave waveform of such as damped oscillation wave profile is normal smooth and pulse-free signal a damp oscillatory wave
Curve then judges to be tested reactor 4 without shelf depreciation, and reaches pressure voltage, is tested 4 insulation status of reactor qualification (such as Fig. 7 institute
Show).
Claims (5)
1. a kind of oscillation wave detects reactor insulation status circuit, including resistance test and Partial Discharge Detection, the circuit of use
Including high-voltage DC power supply (1), charging control switch (2), vibrational control switch (3), it is tested reactor (4), without partial discharge coupling
Capacitor (5), voltmeter (6), detection impedance (7) and Partial discharge detector (8), it is characterised in that:
Described high-voltage DC power supply (1) anode connects one end of charging control switch (2), the other end of charging control switch (2)
The one end of tested reactor (4) is terminated with the one of vibrational control switch (3), no partial discharge coupling capacitor (5) and voltmeter (6) are simultaneously
One after connection terminates the other end of tested reactor (4), the signal input part of another termination detection impedance (7) after parallel connection；It is high
The cathode of DC power supply (1), the other end ground connection of vibrational control switch (3) are pressed, Partial discharge detector (8) connects detection impedance
(7) signal output end, the ground terminal ground connection of detection impedance (7)；
The detection impedance (7) includes magnetic core, two groups of coils is cased on magnetic core, respectively as primary inductor L 1 and secondary inductance
L2；One end after primary inductor L 1, resistance R1, distribution capacity C are in parallel is as signal input part, another termination ground terminal；Secondary side
One end after inductance L2, resistance R2 are in parallel is as signal output end, another termination ground terminal.
2. oscillation wave as described in claim 1 detects reactor insulation status circuit, it is characterised in that: the high voltage direct current
The output voltage of power supply (1) is that 300V~60KV, output voltage and frequency and the voltage class of tested reactor (4) match.
3. oscillation wave as described in claim 1 detects reactor insulation status circuit, it is characterised in that: the charge control
(2) and vibrational control switch (3) are switched as solid electronic switch, charging control switch (2) and vibrational control switch (3) specification are equal
With high-voltage DC power supply (1) voltage matches.
4. oscillation wave as described in claim 1 detects reactor insulation status circuit, it is characterised in that: the no partial discharge coupling
It closes capacitor (5) to match with tested reactor (4) voltage class, detection impedance (7) meets the coupling capacitor in oscillation circuit
Capacitance size is detecting in impedance-tumed capacitance range.
5. oscillation wave as described in claim 1 detects reactor insulation status circuit, it is characterised in that: the shelf depreciation
Detector (8) has signal acquisition, and Digital Signal Processing and image show analytic function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822146500.2U CN209690451U (en) | 2018-12-20 | 2018-12-20 | A kind of oscillation wave detection reactor insulation status circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822146500.2U CN209690451U (en) | 2018-12-20 | 2018-12-20 | A kind of oscillation wave detection reactor insulation status circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209690451U true CN209690451U (en) | 2019-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822146500.2U Expired - Fee Related CN209690451U (en) | 2018-12-20 | 2018-12-20 | A kind of oscillation wave detection reactor insulation status circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209690451U (en) |
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2018
- 2018-12-20 CN CN201822146500.2U patent/CN209690451U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191126 Termination date: 20211220 |
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| CF01 | Termination of patent right due to non-payment of annual fee |