CN109471007A - The method for detecting reactor shelf depreciation by high pressure damp oscillatory wave - Google Patents
The method for detecting reactor shelf depreciation by high pressure damp oscillatory wave Download PDFInfo
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- CN109471007A CN109471007A CN201811563986.8A CN201811563986A CN109471007A CN 109471007 A CN109471007 A CN 109471007A CN 201811563986 A CN201811563986 A CN 201811563986A CN 109471007 A CN109471007 A CN 109471007A
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- partial discharge
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
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- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The present invention relates to a kind of methods for detecting reactor shelf depreciation by high pressure damp oscillatory wave.Current methods limit the progress of reactor local discharge test.The circuit of the method for the present invention 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.Tested reactor detection circuit for access, vibrational control switch, closure charging control switch are disconnected first, predeterminated voltage is charged to no partial discharge coupling capacitor, charging control switch, closure vibrational control switch are disconnected after being full of, damped oscillation wave profile is obtained by Partial discharge detector, such as curve is normal smooth and pulse-free signal, then judges tested reactor without shelf depreciation, otherwise there are shelf depreciations for judgement.Detection method is simple, and oscillation circuit power source loads power is small, and low in energy consumption, test voltage is easy to control, can effectively meet the reactor measurement of partial discharge under different voltages grade.
Description
Technical field
The invention belongs to electric power project engineering fields, are related to a kind of reactor detection method for local discharge, and in particular to one
The method that kind detects reactor shelf depreciation by high pressure damp oscillatory wave.
Background technique
Main component of the shunt reactor as power grid transformer equipment, safety and stability directly affect the safety of power grid.And
The accident of connection reactor is mainly caused by insulation performance is inferior or insulation damages, and by the way that detection partial discharge is horizontal and property, thus
The state of insulation for reflecting high voltage installation is generally acknowledged effective means the sensitiveest in the industry.
Carry out partial discharge detection, it is necessary to the high voltage environment for applying similar operating condition to test product, due to the reactive power of reactor
Very big, existing power frequency or frequency conversion boosting mode need very big power and reactive-load compensation equipment, largely limit
The progress of reactor local discharge test forms the status that current reactor manufactory and user seldom really implement local discharge test.Fig. 1
For currently used detection circuit, detection circuit include AC power source AC, pressure regulator T1, testing transformer T2, without partial discharge coupling
Capacitor C, test reactor L, detection impedance Z and Partial discharge detector J.When detection, pass through pressure regulator T1, testing transformer T2
Predeterminated voltage is boosted to the AC power source AC of input steadily, voltage required for testing is generated on reactor L to be measured.Pass through
Without partial discharge coupling capacitor C, detects impedance Z acquisition, is transmitted to Partial discharge detector J, Partial discharge detector J is to detection data
It calculated, analyze to obtain the shelf depreciation information of tested reactor L.In the entire detection process of reactor shelf depreciation, exchange
Power supply has to last for steady-state supply.
Summary of the invention
The purpose of the present invention is to the deficiencies in the prior art, provide a kind of by the detection reactance of high pressure damp oscillatory wave
The method of device shelf depreciation.
To realize that above-mentioned detection method, the present invention use following detection circuit: being opened including high-voltage DC power supply, charge control
It closes, vibrational control switch, be tested reactor, without partial discharge 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.
It detects the specific structure of impedance: including magnetic core, two groups of coils is 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.
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.
Specific detection method is: by tested reactor detection circuit for access, switching vibrational control disconnect first, then will fill
Electric control switch closure, high-voltage DC power supply charge to predeterminated voltage to no partial discharge coupling capacitor.Without partial discharge coupling capacitor
After fully charged, when voltmeter numerical value reaches high-voltage DC power supply voltage output value, charging control switch is disconnected, then oscillation is controlled
System closes the switch, and is tested reactor and forms serial oscillation circuit without partial discharge coupling capacitor, and being tested on reactor is that generation is temporary
The high pressure damped oscillation of state is received by Partial discharge detector, is handled, the oscillation wave signal that display detection impedance collection arrives,
Finally damped oscillation wave profile is shown in Partial discharge detector.The oscillation wave waveform of such as damped oscillation wave profile is one
Normal smooth and pulse-free signal damped oscillation wave profile then judges tested reactor without shelf depreciation；Such as damped oscillation
There are pulse signals for the oscillation wave waveform of wave profile, then judge that there are shelf depreciations for tested reactor.
The method of the present invention is using DC high-voltage power supply to filling in tested reactor circuit without partial discharge coupling capacitor
Electricity makes DC high-voltage power supply stop power output after coupling capacitor is fully charged using the closing of high-voltage electric switch, and same
When closed high solid electronic switch, so that tested reactor and coupling capacitor is formed oscillation circuit, generate high pressure damped oscillation
Oscillation wave carries out local discharge test detection using the ac high-voltage during damped oscillation in short-term.
The method of the present invention is not necessarily to measure loop continued power, to the high-voltage DC power supplies of needs phase compared with prior art
It is low to requiring.The detection method is simple, changes conventional reactor insulation status measurement method, and oscillation circuit power source loads function
Rate is small, low in energy consumption, and test voltage is easy to control, can effectively meet the reactor measurement of partial discharge under different voltages grade.?
The power of test and the scale of equipment are greatly reduced under the premise of meeting testing requirements, are generality application reactor
Partial discharge detection creates conditions, and very convenient scene uses, and is suitble to be widely applied in the work of reactor Partial Discharge Detection from now on.
Detailed description of the invention
Fig. 1 is existing reactor detection circuit for partial discharge schematic diagram；
Fig. 2 is the circuit diagram that the method for the present invention uses circuit；
Fig. 3 is the circuit diagram that impedance is detected in Fig. 2；
Fig. 4 is no partial discharge damped oscillation waveform schematic diagram；
Fig. 5 is that there are partial discharge damped oscillation waveform schematic diagrames.
Specific embodiment
A kind of detection method of reactor shelf depreciation, the detection circuit that this method uses are as shown in Figure 2: including high straightening
Galvanic electricity source 1, vibrational control switch 3, is tested reactor 4, without partial discharge coupling capacitor 5, voltmeter 6, inspection at charging control switch 2
Survey impedance 7 and Partial discharge 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
The one of vibrational control switch 3 terminates one end of tested reactor 4, one end after 6 parallel connection of no partial discharge coupling capacitor 5 and voltmeter
The other end of tested reactor 4 is connect, the signal input part of another termination detection impedance 7 after parallel connection；High-voltage DC power supply 1 is born
Pole, vibrational control switch 3 the other end ground connection, Partial discharge detector 8 connect detection impedance 7 signal output end, detect impedance 7
Ground terminal ground connection.
As shown in figure 3, 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 etc.
Grade matching, detection impedance 7 meet the coupling capacitor capacitance size in oscillation circuit and are detecting in impedance-tumed capacitance range；
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, charging control switch 2 is disconnected, then vibrational control is switched
3 closures are tested reactor 4 and form serial oscillation circuit without partial discharge coupling capacitor 5, are tested on reactor 4 and generate transient state
High pressure damped oscillation, by Partial discharge detector 8 receive, processing, display detection the collected oscillation wave signal of impedance 7,
Finally damped oscillation wave profile is shown in Partial discharge detector 8.The oscillation wave waveform of such as damped oscillation wave profile is one
Normal smooth and pulse-free signal the damped oscillation wave profile of item, then judge tested reactor 4 without shelf depreciation (such as Fig. 4 institute
Show)；The oscillation wave waveform of such as damped oscillation wave profile is the damped oscillation wave profile for having pulse signal, then judgement is tested
There are shelf depreciation (as shown in Figure 5) for reactor 4.
Claims (5)
1. the method for detecting reactor shelf depreciation by high pressure damp oscillatory wave, the circuit that this method uses includes high voltage direct current
Power supply (1), vibrational control switch (3), is tested reactor (4), without partial discharge coupling capacitor (5), electricity at charging control switch (2)
Press table (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；
Specific detection method is:
Vibrational control switch (3) is disconnected to, then tested reactor (4) detection circuit for access by charging control switch (2) first
Closure, high-voltage DC power supply (1) charge to predeterminated voltage to no partial discharge coupling capacitor (5)；
Without partial discharge coupling capacitor (5) it is fully charged after, when voltmeter (6) numerical value reaches high-voltage DC power supply (1) voltage output value,
Charging control switch (2) are disconnected, then by vibrational control switch (3) closure, are tested reactor (4) and without partial discharge coupling capacitor
(5) serial oscillation circuit is formed, the high pressure damped oscillation for generating transient state on reactor (4) is tested, passes through Partial Discharge Detection
Instrument (8) receives, processing, shows detection impedance (7) collected oscillation wave signal, finally shows in Partial discharge detector (8)
Damped oscillation wave profile out；
The oscillation wave waveform of such as damped oscillation wave profile is normal smooth and pulse-free signal a damped oscillation wave profile,
Then judge tested reactor (4) without shelf depreciation；The oscillation wave waveform of such as damped oscillation wave profile, which is one, pulse signal
Damped oscillation wave profile, then judge that tested reactor (4) there are shelf depreciations.
2. the method for detecting reactor shelf depreciation by high pressure damp oscillatory wave as described in claim 1, it is characterised in that:
The output voltage of the high-voltage DC power supply (1) is 300V~60KV, the electricity of output voltage and frequency and tested reactor (4)
Pressure grade matches.
3. the method for detecting reactor shelf depreciation by high pressure damp oscillatory wave as described in claim 1, it is characterised in that:
The charging control switch (2) and vibrational control switch (3) are solid electronic switch, charging control switch (2) and oscillation control
System switch (3) specification with high-voltage DC power supply (1) voltage matches.
4. the method for detecting reactor shelf depreciation by high pressure damp oscillatory wave as described in claim 1, it is characterised in that:
Described matches without partial discharge coupling capacitor (5) with tested reactor (4) voltage class, and detection impedance (7) meets oscillation circuit
In coupling capacitor capacitance size detecting in impedance-tumed capacitance range.
5. the method for detecting reactor shelf depreciation by high pressure damp oscillatory wave as described in claim 1, it is characterised in that:
The Partial discharge detector (8) has signal acquisition, and Digital Signal Processing and image show analytic function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811563986.8A CN109471007A (en) | 2018-12-20 | 2018-12-20 | The method for detecting reactor shelf depreciation by high pressure damp oscillatory wave |
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| CN201811563986.8A CN109471007A (en) | 2018-12-20 | 2018-12-20 | The method for detecting reactor shelf depreciation by high pressure damp oscillatory wave |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109901034A (en) * | 2019-04-02 | 2019-06-18 | 国网陕西省电力公司电力科学研究院 | Power cable local discharge detection device and appraisal procedure based on multi-stag power supply and series resonance |
| CN110196382A (en) * | 2019-07-05 | 2019-09-03 | 杭州西湖电子研究所 | A kind of no check frequency oscillation wave partial discharge detection device |
| CN110531185A (en) * | 2019-07-12 | 2019-12-03 | 福建火炬电子科技股份有限公司 | A kind of impulse capacitor discharge current test circuit, test device and test mode |
| CN110988614A (en) * | 2019-11-12 | 2020-04-10 | 国网山西省电力公司电力科学研究院 | Ring main unit electric pulse partial discharge coupling capacitance sensor |
| CN112782545A (en) * | 2021-03-18 | 2021-05-11 | 西安热工研究院有限公司 | Method for testing partial discharge of generator |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109901034A (en) * | 2019-04-02 | 2019-06-18 | 国网陕西省电力公司电力科学研究院 | Power cable local discharge detection device and appraisal procedure based on multi-stag power supply and series resonance |
| CN110196382A (en) * | 2019-07-05 | 2019-09-03 | 杭州西湖电子研究所 | A kind of no check frequency oscillation wave partial discharge detection device |
| CN110196382B (en) * | 2019-07-05 | 2023-12-22 | 杭州西湖电子研究所 | No detection blind area oscillatory wave partial discharge detection device |
| CN110531185A (en) * | 2019-07-12 | 2019-12-03 | 福建火炬电子科技股份有限公司 | A kind of impulse capacitor discharge current test circuit, test device and test mode |
| CN110988614A (en) * | 2019-11-12 | 2020-04-10 | 国网山西省电力公司电力科学研究院 | Ring main unit electric pulse partial discharge coupling capacitance sensor |
| CN112782545A (en) * | 2021-03-18 | 2021-05-11 | 西安热工研究院有限公司 | Method for testing partial discharge of generator |
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