CN104808121A - Distributing cable partial discharge test method based on oscillatory wave test - Google Patents
Distributing cable partial discharge test method based on oscillatory wave test Download PDFInfo
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- CN104808121A CN104808121A CN201510173365.9A CN201510173365A CN104808121A CN 104808121 A CN104808121 A CN 104808121A CN 201510173365 A CN201510173365 A CN 201510173365A CN 104808121 A CN104808121 A CN 104808121A
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Abstract
Disclosed is a distributing cable partial discharge test method based on oscillatory wave test. The method includes that a cable partial discharge testing and locating system based on oscillatory wave test is established; by means of the testing system, a cable is charged through a method of voltage increasing to a preset value at a tested cable end, and damped oscillation voltage is generated at the tested cable end through resonance oscillation that occurs by an inductor and a tested cable capacitor in the system; when partial discharge occurs at a position of the tested cable in a distance from a testing end, pulses can spread in two directions along the cable, and the position where the partial discharge occurs can be determined according to time difference that two pulses such as incident wave and radioactive wave reach the testing end. According to the distributing cable partial discharge test method based on oscillatory wave test, oscillatory wave is applied to partial discharge test of the distributing cable, and voltage increasing is performed on the cable through sine oscillatory wave that is generated by resonance oscillation of fixed inductor and the cable. By means of the distributing cable partial discharge test method based on oscillatory wave test, insulating conditions of the cable can be timely known within short time by the system, and thereby, accidents of the cable can be effectively prevented.
Description
Technical field
The invention belongs to Partial Discharge Detecting Technology field, particularly relate to a kind of distribution cable local discharge measuring method based on wave of oscillation test.
Background technology
In electric system, habitually in the past general cable test is the high-tension electricity tested cable being added to direct current, to check the size of DC leakage-current, and the ultra-low frequency AC voltage withstand test of 0.1Hz etc.Usually these methods all can only judge that cable bears the situation of voltage on the one hand, and the defect point of cable insulation can not be judged, more can not find and localization part electric discharge hidden danger, this test belongs to destructive test on the other hand, insulation for cable has certain destruction, particularly after DC high potential test, crosslinked polyetylene insulated inside still keeps the molecules align of polarized state, not easily return to the state before pressurization, thus cause the cable of the stand the test accident breakdown very soon that insulate after power transmission to happen occasionally.
By to cable operating maintenance data analysis, find that the cable insulation breakdown fault that shelf depreciation causes occupies larger specific gravity, therefore in the urgent need to the import of advanced technology, Timeliness coverage positioning cable latency shelf depreciation defect.
Summary of the invention
In order to solve the problem, the object of the present invention is to provide a kind of distribution cable local discharge measuring method based on wave of oscillation test.
In order to achieve the above object, the distribution cable local discharge measuring method based on wave of oscillation test provided by the invention comprises the following step performed in order:
Step 1) set up test macro: set up the cable local discharge test based on wave of oscillation test and positioning system;
Step 2) test: utilize above-mentioned cable local discharge to test and positioning system, by the method being forced into preset value at tested cut cable, this cable is charged, and produce damped oscillation voltage by inductance in cable local discharge test and positioning system and tested electric cable capacitance generation resonance at tested cut cable;
Step 3) location: when tested cable occurs apart from test lead somewhere shelf depreciation, pulse will be propagated along cable to both direction, arrive the mistiming of test lead, determine the position that shelf depreciation occurs according to incident wave and radioactive wave two pulses.
In step 1) in, described cable local discharge test comprises with positioning system:
Data collection and analysis unit A, the first amplifier B1, the second amplifier B2, wave filter B3, locally coupled unit B 4, controllable electric power E, electronic switch K, inductor L1, the first resistance R1, the second resistance R2, current-limiting resistance R3, the first electric capacity C1 and the second electric capacity C2, wherein: two output terminals of data collection and analysis unit A are connected with the control end of electronic switch K with controllable electric power E respectively, the negative pole of controllable electric power E is connected with ground wire, positive pole is connected with the test lead of tested cable D with inductor L1 by current-limiting resistance R3 successively, two main terminals one of electronic switch K are connected with ground wire, another is connected with the tie point of inductor L1 with mistake current-limiting resistance R3, first resistance R1 is connected with the test lead of tested cable D with its one end after the first electric capacity C1 parallel connection, the other end is connected with the input end of the first amplifier B1, one end of second resistance R2 and the input end of the first amplifier B1, the other end is connected with an input end of locally coupled unit B 4, one end of second electric capacity C2 is connected with the input end of the first amplifier B1, the other end is connected with another input end of locally coupled unit B 4, the reference point of locally coupled unit B 4 is connected with ground wire, the output terminal of the first amplifier B1 is connected with an input end of data collection and analysis unit A, the input end of the second amplifier B2 is connected with the output terminal of locally coupled unit B 4, output terminal is connected with another input end of data collection and analysis unit A by wave filter B3, the screen layer of tested cable D is connected with ground wire,
Described data collection and analysis unit A is Data collection and precessing system, for automatically gathering Partial discharge signal through coupling unit and filter process and end reflection signal from Devices to test, and applies relative program and carries out computing to the information collected;
Described locally coupled unit B 4 for while also measure local electric discharge and trial voltage waveform signal;
Described controllable electric power E is 0-28kV controlled power of direct current, can control it open or close by control end;
Described electronic switch K is the high-voltage switch gear adopting IGBT;
Described inductor L1 is 0.8H power inductor, and the first resistance R1 is 150M Ω resistor, the second resistance R2 is 15k Ω resistor, current-limiting resistance R3 is 1k Ω resistor, the first electric capacity C1 is 1nF capacitor and the second electric capacity C2 is 10uF capacitor.
In step 2) in, the concrete grammar of described test comprises the steps:
Step 2.1) tested cable is charged: utilize above-mentioned cable local discharge to test and with positioning system, tested cable D is charged;
Step 2.2) tested cable discharge: connect the test of above-mentioned cable local discharge and the discharge loop in positioning system, tested cable D is discharged;
Step 2.3) record test lead voltage, current signal waveform: utilize voltage, the current signal waveform on data collection and analysis unit A real time record tested cable D test lead.
In step 2.1) in, the concrete grammar of described charging is: utilize above-mentioned cable local discharge to test and be forced into preset value U with the direct supply in positioning system at tested cut cable
c (0-);
Be added in voltage on tested cable D by during test known to oscillation circuit analytical calculation, electric current be respectively:
U
c＝Ae
-δtsin(ωt+θ)
In formula:
Wherein, R is tested cable D resistance and this cable grounding partial ohmic sum, the equivalent capacitance value of L to be system inductance 0.8H, C be tested cable D.
In step 2.2) in, the concrete grammar of described electric discharge is: closed above-mentioned cable local discharge test and the electronic switch K in positioning system, with tested electric cable capacitance D, resonance occurs by inductance L 1, tested cable D test lead produces damped oscillation voltage.
In step 3) in, the concrete grammar of described location is: for a long tested cable D for l, if there is shelf depreciation apart from test lead x place, pulse will be propagated along tested cable D to both direction with velocity of wave v; Incident wave elapsed time t
1arrive test lead, reflection wave is propagated to test opposite end, and reflects at tested cable D end, propagates afterwards, elapsed time t to test lead again
2arrive test lead, the mistiming Δ t arriving test lead according to two pulses calculates shelf depreciation generation position, namely
Can extrapolate:
The effect of the distribution cable local discharge measuring method based on wave of oscillation test provided by the invention:
The present invention compared with prior art, possesses following advantage:
1, this method of testing can not produce damage to cable
Because adopt fixed inductance and cable resonance to produce sine-wave oscillation ripple during test to pressurize, its waveform and frequency are close to power frequency, and voltage-duration is less than 100ms, so can not produce damage to cable.
2, wave form distortion is reduced
Utilize RC divider can test the characteristic of Rapid Variable Design process to test waveform and the cable local discharge of oscillating voltage, the voltage surveying voltage divider each point during Rapid Variable Design process mainly by capacitance profile, substantially reduce over the ground stray capacitance to the distortion of electric resistance partial pressure waveform.
3, reduce testing blind zone, increase test specification
Adopt the method for building-out capacitor, the building-out capacitor of use 150nF is in parallel with tested cable carries out frequency reducing, make no load test frequency theory reaches 460Hz, within oscillation frequency when testing stub cable has been reduced to 500Hz, thus solve because cable length is less than 400 meters, capacitance is too little, and oscillation frequency is too high and the problem that cannot test, reduce testing blind zone, increase test specification.
4, use anti-corona electrode, eliminate electric discharge interference
Anti-corona electrode is used to maintenance cable, effectively eliminate the electric discharge interference of cable terminal and system junction, office's to one's heart's content condition of cable terminal inside just can be judged according to test data, and the situation that the creeping discharge that efficiently avoid connecting clamp makes 3D figure point of discharge mixed and disorderly, improve the reference significance of 3D figure.
Accompanying drawing explanation
Fig. 1 is the test principle figure used in the distribution cable local discharge measuring method based on wave of oscillation test provided by the invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the distribution cable local discharge measuring method based on wave of oscillation test provided by the invention is described in detail.
Distribution cable local discharge measuring method based on wave of oscillation test provided by the invention comprises the following step performed in order:
Step 1) set up test macro: set up the cable local discharge test based on wave of oscillation test and positioning system;
Step 2) test: utilize above-mentioned cable local discharge to test and positioning system, by the method being forced into preset value at tested cut cable, this cable is charged, and produce damped oscillation voltage by inductance in cable local discharge test and positioning system and tested electric cable capacitance generation resonance at tested cut cable;
Step 3) location: when tested cable occurs apart from test lead somewhere shelf depreciation, pulse will be propagated along cable to both direction, arrive the mistiming of test lead, determine the position that shelf depreciation occurs according to incident wave and radioactive wave two pulses.
In step 1) in, as shown in Figure 1, it comprises for described cable local discharge test and positioning system:
Data collection and analysis unit A, the first amplifier B1, the second amplifier B2, wave filter B3, locally coupled unit B 4, controllable electric power E, electronic switch K, inductor L1, the first resistance R1, the second resistance R2, current-limiting resistance R3, the first electric capacity C1 and the second electric capacity C2, wherein: two output terminals of data collection and analysis unit A are connected with the control end of electronic switch K with controllable electric power E respectively, the negative pole of controllable electric power E is connected with ground wire, positive pole is connected with the test lead of tested cable D with inductor L1 by current-limiting resistance R3 successively, two main terminals one of electronic switch K are connected with ground wire, another is connected with the tie point of inductor L1 with mistake current-limiting resistance R3, first resistance R1 is connected with the test lead of tested cable D with its one end after the first electric capacity C1 parallel connection, the other end is connected with the input end of the first amplifier B1, one end of second resistance R2 and the input end of the first amplifier B1, the other end is connected with an input end of locally coupled unit B 4, one end of second electric capacity C2 is connected with the input end of the first amplifier B1, the other end is connected with another input end of locally coupled unit B 4, the reference point of locally coupled unit B 4 is connected with ground wire, the output terminal of the first amplifier B1 is connected with an input end of data collection and analysis unit A, the input end of the second amplifier B2 is connected with the output terminal of locally coupled unit B 4, output terminal is connected with another input end of data collection and analysis unit A by wave filter B3, the screen layer of tested cable D is connected with ground wire.
Described data collection and analysis unit A is Data collection and precessing system, for automatically gathering Partial discharge signal through coupling unit and filter process and end reflection signal from Devices to test, and applies relative program and carries out computing to the information collected;
Described locally coupled unit B 4 for while also measure local electric discharge and trial voltage waveform signal;
Described controllable electric power E is 0-28kV controlled power of direct current, can control it open or close by control end;
Described electronic switch K is the high-voltage switch gear adopting IGBT;
Described inductor L1 is 0.8H power inductor, and the first resistance R1 is 150M Ω resistor, the second resistance R2 is 15k Ω resistor, current-limiting resistance R3 is 1k Ω resistor, the first electric capacity C1 is 1nF capacitor and the second electric capacity C2 is 10uF capacitor.
In step 2) in, the concrete grammar of described test comprises the steps:
Step 2.1) tested cable is charged: utilize above-mentioned cable local discharge to test and with positioning system, tested cable D is charged;
Step 2.2) tested cable discharge: connect the test of above-mentioned cable local discharge and the discharge loop in positioning system, tested cable D is discharged;
Step 2.3) record test lead voltage, current signal waveform: utilize voltage, the current signal waveform on data collection and analysis unit A real time record tested cable D test lead.
In step 2.1) in, the concrete grammar of described charging is: utilize above-mentioned cable local discharge to test and be forced into preset value U with the direct supply in positioning system at tested cut cable
c (0-).
Be added in voltage on tested cable D by during test known to oscillation circuit analytical calculation, electric current be respectively:
U
c＝Ae
-δtsin(ωt+θ)
In formula:
Wherein, R is tested cable D resistance and this cable grounding partial ohmic sum, the equivalent capacitance value of L to be system inductance 0.8H, C be tested cable D.
In step 2.2) in, the concrete grammar of described electric discharge is: closed above-mentioned cable local discharge test and the electronic switch K in positioning system, with tested electric cable capacitance D, resonance occurs by inductance L 1, tested cable D test lead produces damped oscillation voltage.
In step 3) in, the concrete grammar of described location is: for a long tested cable D for l, if there is shelf depreciation apart from test lead x place, pulse will be propagated along tested cable D to both direction with velocity of wave v; Incident wave elapsed time t1 arrives test lead, and reflection wave is propagated to test opposite end, and reflects at tested cable D end, propagate to test lead more afterwards, elapsed time t2 arrives test lead, and the mistiming Δ t arriving test lead according to two pulses calculates shelf depreciation generation position, namely
Can extrapolate:
Partial discharge signal and end reflection signal thereof are put coupling unit by office and are collected in system through operational amplifier and wave filter, by showing intuitively after the computational analysis of testing software.
Distribution cable local discharge measuring method based on wave of oscillation test provided by the invention is the shelf depreciation test wave of oscillation being used for distribution cable, uses the resonance of fixing inductance and cable to produce sine-wave oscillation ripple and pressurizes to cable.Use system of the present invention can understand the insulation status of cable at short notice in time, thus can effectively prevent cable from having an accident.
Claims (6)
1., based on a distribution cable local discharge measuring method for wave of oscillation test, it is characterized in that: it comprises the following step performed in order:
Step 1) set up test macro: set up the cable local discharge test based on wave of oscillation test and positioning system;
Step 2) test: utilize above-mentioned cable local discharge to test and positioning system, by the method being forced into preset value at tested cut cable, this cable is charged, and produce damped oscillation voltage by inductance in cable local discharge test and positioning system and tested electric cable capacitance generation resonance at tested cut cable;
Step 3) location: when tested cable occurs apart from test lead somewhere shelf depreciation, pulse will be propagated along cable to both direction, arrive the mistiming of test lead, determine the position that shelf depreciation occurs according to incident wave and radioactive wave two pulses.
2. the distribution cable local discharge measuring method based on wave of oscillation test according to claim 1, is characterized in that: in step 1) in, described cable local discharge test comprises with positioning system:
Data collection and analysis unit A, the first amplifier B1, the second amplifier B2, wave filter B3, locally coupled unit B 4, controllable electric power E, electronic switch K, inductor L1, the first resistance R1, the second resistance R2, current-limiting resistance R3, the first electric capacity C1 and the second electric capacity C2, wherein: two output terminals of data collection and analysis unit A are connected with the control end of electronic switch K with controllable electric power E respectively, the negative pole of controllable electric power E is connected with ground wire, positive pole is connected with the test lead of tested cable D with inductor L1 by current-limiting resistance R3 successively, two main terminals one of electronic switch K are connected with ground wire, another is connected with the tie point of inductor L1 with mistake current-limiting resistance R3, first resistance R1 is connected with the test lead of tested cable D with its one end after the first electric capacity C1 parallel connection, the other end is connected with the input end of the first amplifier B1, one end of second resistance R2 and the input end of the first amplifier B1, the other end is connected with an input end of locally coupled unit B 4, one end of second electric capacity C2 is connected with the input end of the first amplifier B1, the other end is connected with another input end of locally coupled unit B 4, the reference point of locally coupled unit B 4 is connected with ground wire, the output terminal of the first amplifier B1 is connected with an input end of data collection and analysis unit A, the input end of the second amplifier B2 is connected with the output terminal of locally coupled unit B 4, output terminal is connected with another input end of data collection and analysis unit A by wave filter B3, the screen layer of tested cable D is connected with ground wire,
Described data collection and analysis unit A is Data collection and precessing system, for automatically gathering Partial discharge signal through coupling unit and filter process and end reflection signal from Devices to test, and applies relative program and carries out computing to the information collected;
Described locally coupled unit B 4 for while also measure local electric discharge and trial voltage waveform signal;
Described controllable electric power E is 0-28kV controlled power of direct current, can control it open or close by control end;
Described electronic switch K is the high-voltage switch gear adopting IGBT;
Described inductor L1 is 0.8H power inductor, and the first resistance R1 is 150M Ω resistor, the second resistance R2 is 15k Ω resistor, current-limiting resistance R3 is 1k Ω resistor, the first electric capacity C1 is 1nF capacitor and the second electric capacity C2 is 10uF capacitor.
3. the distribution cable local discharge measuring method based on wave of oscillation test according to claim 1, is characterized in that: in step 2) in, the concrete grammar of described test comprises the steps:
Step 2.1) tested cable is charged: utilize above-mentioned cable local discharge to test and with positioning system, tested cable D is charged;
Step 2.2) tested cable discharge: connect the test of above-mentioned cable local discharge and the discharge loop in positioning system, tested cable D is discharged;
Step 2.3) record test lead voltage, current signal waveform: utilize voltage, the current signal waveform on data collection and analysis unit A real time record tested cable D test lead.
4. the distribution cable local discharge measuring method based on wave of oscillation test according to claim 3, it is characterized in that: in step 2.1) in, the concrete grammar of described charging is: utilize above-mentioned cable local discharge to test and be forced into preset value U with the direct supply in positioning system at tested cut cable
c (0-);
Be added in voltage on tested cable D by during test known to oscillation circuit analytical calculation, electric current be respectively:
U
c＝Ae
-δtsin(ωt+θ)
In formula:
Wherein, R is tested cable D resistance and this cable grounding partial ohmic sum, the equivalent capacitance value of L to be system inductance 0.8H, C be tested cable D.
5. the distribution cable local discharge measuring method based on wave of oscillation test according to claim 3, it is characterized in that: in step 2.2) in, the concrete grammar of described electric discharge is: closed above-mentioned cable local discharge test and the electronic switch K in positioning system, there is resonance by inductance L 1 with tested electric cable capacitance D, tested cable D test lead produces damped oscillation voltage.
6. the distribution cable local discharge measuring method based on wave of oscillation test according to claim 1, it is characterized in that: in step 3) in, the concrete grammar of described location is: for a long tested cable D for l, if there is shelf depreciation apart from test lead x place, pulse will propagated to both direction along tested cable D with velocity of wave v; Incident wave elapsed time t
1arrive test lead, reflection wave is propagated to test opposite end, and reflects at tested cable D end, propagates afterwards, elapsed time t to test lead again
2arrive test lead, the mistiming Δ t arriving test lead according to two pulses calculates shelf depreciation generation position, namely
Can extrapolate:
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388401A (en) * | 2015-10-26 | 2016-03-09 | 云南电网有限责任公司电力科学研究院 | Novel cable oscillation wave partial discharge detection system |
| CN106556782A (en) * | 2016-11-17 | 2017-04-05 | 中国电力科学研究院 | A kind of Partial Discharge Sources location determining method and system |
| CN108427062A (en) * | 2017-02-14 | 2018-08-21 | 丁晓东 | Using the frequency conversion resonance vibration pressure-proof local discharge test device and method of intermittent drive |
| CN108450014A (en) * | 2015-08-28 | 2018-08-24 | 莱尼电缆有限公司 | Monitoring system, for this monitoring system safe cable and hose and operation monitoring system method |
| CN108776290A (en) * | 2018-08-20 | 2018-11-09 | 安徽国锦电力工程有限公司 | A kind of cable Sasser testing equipment and its application method |
| CN109031077A (en) * | 2018-09-14 | 2018-12-18 | 国网甘肃省电力公司电力科学研究院 | A kind of cable oscillatory wave partial discharge fault location system |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100206656B1 (en) * | 1996-09-24 | 1999-07-01 | 이종훈 | Underground power cable test apparatus. |
| CN102749558A (en) * | 2012-06-20 | 2012-10-24 | 西安博源电气有限公司 | Device and method for detecting cable oscillatory wave partial discharge and fault location |
| CN202770953U (en) * | 2012-07-24 | 2013-03-06 | 江苏省电力公司电力科学研究院 | Partial discharge detector for oscillating wave of crosslinked cable |
| CN103364699A (en) * | 2013-07-19 | 2013-10-23 | 华北电力大学 | Cable discharging fault detection device |
| CN203365619U (en) * | 2013-08-19 | 2013-12-25 | 广东弘光电力工程有限公司 | System for detecting and positioning partial discharge of cable oscillation waves |
| CN103852697A (en) * | 2014-02-20 | 2014-06-11 | 广州供电局有限公司 | Cable partial discharge detection device |
| CN203658523U (en) * | 2013-12-18 | 2014-06-18 | 上海思瑞在线监测技术有限公司 | Cable insulation detection equipment based on oscillating wave test |
-
2015
- 2015-04-13 CN CN201510173365.9A patent/CN104808121A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100206656B1 (en) * | 1996-09-24 | 1999-07-01 | 이종훈 | Underground power cable test apparatus. |
| CN102749558A (en) * | 2012-06-20 | 2012-10-24 | 西安博源电气有限公司 | Device and method for detecting cable oscillatory wave partial discharge and fault location |
| CN202770953U (en) * | 2012-07-24 | 2013-03-06 | 江苏省电力公司电力科学研究院 | Partial discharge detector for oscillating wave of crosslinked cable |
| CN103364699A (en) * | 2013-07-19 | 2013-10-23 | 华北电力大学 | Cable discharging fault detection device |
| CN203365619U (en) * | 2013-08-19 | 2013-12-25 | 广东弘光电力工程有限公司 | System for detecting and positioning partial discharge of cable oscillation waves |
| CN203658523U (en) * | 2013-12-18 | 2014-06-18 | 上海思瑞在线监测技术有限公司 | Cable insulation detection equipment based on oscillating wave test |
| CN103852697A (en) * | 2014-02-20 | 2014-06-11 | 广州供电局有限公司 | Cable partial discharge detection device |
Non-Patent Citations (3)
| Title |
|---|
| 于恩波 等: "探讨振荡波测试系统在电缆局部放电测试及定位中的应用", 《山东电机工程学会第十二届优秀论文汇编》 * |
| 余英 等: "10kV电缆振荡波局放测试的理论分析与试验研究", 《高压电器》 * |
| 彭发东 等: "阻尼振荡波下检测XLPE电缆局部放电和耐压与工频的等效性综述", 《高压电器》 * |
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| CN106556782B (en) * | 2016-11-17 | 2020-12-18 | 中国电力科学研究院 | Partial discharge source position determining method and system |
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| CN109613407A (en) * | 2019-01-08 | 2019-04-12 | 国网江苏省电力有限公司电力科学研究院 | Power cable partial discharge location system and detection method |
| CN109655726A (en) * | 2019-01-08 | 2019-04-19 | 国网江苏省电力有限公司电力科学研究院 | Power cable partial discharge location system and detection method based on solenoid high-voltage line |
| CN109655726B (en) * | 2019-01-08 | 2024-03-08 | 国网江苏省电力有限公司电力科学研究院 | Power cable partial discharge positioning system and detection method based on solenoid high-voltage line |
| CN109613407B (en) * | 2019-01-08 | 2024-03-08 | 国网江苏省电力有限公司电力科学研究院 | Power cable partial discharge positioning system and detection method |
| CN111693802A (en) * | 2020-05-22 | 2020-09-22 | 国网河北省电力有限公司电力科学研究院 | Frequency-adjustable cosine square wave voltage generation device and method |
| CN112697174A (en) * | 2020-12-14 | 2021-04-23 | 潍柴动力股份有限公司 | Measuring method and measuring circuit |
| CN113295978A (en) * | 2021-06-09 | 2021-08-24 | 广东电网有限责任公司 | Cable detection device, method, terminal device and computer readable storage medium |
| CN115856525A (en) * | 2022-11-08 | 2023-03-28 | 武汉朗德电气有限公司 | Cable partial discharge online monitoring method and system |
| CN115856525B (en) * | 2022-11-08 | 2024-03-19 | 武汉朗德电气有限公司 | Cable partial discharge on-line monitoring method and system |
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Application publication date: 20150729 |