CN203422447U - Alternating current withstanding voltage and oscillatory wave partial discharge test device for cable - Google Patents
Alternating current withstanding voltage and oscillatory wave partial discharge test device for cable Download PDFInfo
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- CN203422447U CN203422447U CN201320567306.6U CN201320567306U CN203422447U CN 203422447 U CN203422447 U CN 203422447U CN 201320567306 U CN201320567306 U CN 201320567306U CN 203422447 U CN203422447 U CN 203422447U
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Abstract
The utility model discloses an alternating current withstanding voltage and oscillatory wave partial discharge test device for the cable in the repair field of power transmission and power distribution. The device comprises a frequency converter, a high-voltage switch module, a voltage division detector, a resonant reactor and a data acquisition and processing unit, and is characterized in that synchronous optical signals from the frequency converter are inputted into the high-voltage switch module; action of the high-voltage switch is controlled by the synchronous optical signals; the frequency converter comprises a frequency conversion host and an exciting transformer; the high-voltage switch module is in parallel connection with the output of the exciting transformer; the voltage division detector separates power supply interference and detects partial discharge signals of a tested product; the frequency conversion host generates continuous alternating-current attenuated damped oscillation waves for automatic and continuous voltage increasing; and the signals are transmitted via wireless transmission to a partial discharge instrument for processing and data display. The alternating current withstanding voltage and oscillatory wave partial discharge test device for the cable has the advantages of accurate tested data, reliable positioning and the like.
Description
Technical field
The utility model relates to the power cable Partial Discharge Detecting Technology in power transmission and distribution maintenance field, particularly a kind of cable ac voltage withstanding and oscillation wave partial discharge testing apparatus.
Background technology
In electric system, feeder cable is being served as very important role, how accurately to grasp the health status of distribution cable, formulates correct maintenance countermeasure, avoids the generation of the sudden accident that causes because of the quality problems of cable own, becomes particularly important.Research discovery, the partial discharge quantity of cable and its insulation status are closely related, and the variation of partial discharge quantity is indicating that cable insulation may exist the defect of harm cable running safety.At present, apply in the world OWTS wave of oscillation cable local discharge more widely and detect and location technology, position and the detection itself that can effectively detect and locate feeder cable shelf depreciation do not damage cable.Its exemplary apparatus be Germany match despot's OWTS wave of oscillation cable local discharge detect and locating device as shown in Figure 1.During detection, can apply flexibly the DC voltage of 0-28kV, close after semiconductor switch, tested cable and inductance produce damped oscillation.The power cables capacitance model 0.05 μ F-2 μ F that this device can detect.Its major defect be adopt DC boosting then closed high switch make to carry without office, put reactor and produce decay damp oscillatory wave with test product cable (C). generally only have hundreds of milliseconds. energy is very little, can not boost continuously, the Partial discharge signal gathering under multiple oscillation ripple needs the long period.Do not press close to the actual service condition of cable yet.
Summary of the invention
The purpose of the present utility model overcomes the deficiencies in the prior art, and a kind of faint insulation defect that can find reliably cable and cable splice is provided, and the cable ac voltage withstanding that can accurately locate and oscillation wave partial discharge testing apparatus.
The utility model is achieved through the following technical solutions:
A kind of cable ac voltage withstanding and oscillation wave partial discharge testing apparatus, comprise frequency converter, high-voltage switch gear module, dividing potential drop detecting device, resonance reactor and data acquisition process unit, it is characterized in that: the synchronizable optical optical fiber signaling from frequency converter is input in high-voltage switch gear module, synchronizable optical optical fiber signaling is controlled high-voltage switch gear action, frequency converter is comprised of frequency conversion main frame and exciting transformer, the output-parallel of high-voltage switch gear module and exciting transformer, dividing potential drop detecting device separative power power supply disturbs and detects test product Partial discharge signal, can find reliably the faint insulation defect of cable and cable splice, and can accurately locate, frequency conversion main frame produces interchange decay damp oscillatory wave continuously and automatically carries out continuous pressure, data acquisition process unit carries out A/D conversion by high speed degree of depth storage of collected plate, package unit can automatically carry out continuous pressure and repeatedly measure, more press close to the actual service condition of cable. and can effectively get rid of the interference in Partial discharge signal by the comparison of measurement data repeatedly, make measurement data more accurate, measure the data obtained and by wireless transmission, be emitted to PD meter and process with data and show.
The utility model compared with prior art has following beneficial effect:
1. measurement data is accurate;
2. location is reliable.
Accompanying drawing explanation
Fig. 1 is cable ac voltage withstanding and oscillation wave partial discharge testing apparatus schematic diagram.
In figure: frequency conversion main frame 1, exciting transformer 2, synchronous optical fiber 3, high-voltage switch gear 4, resonance reactor 5, dividing potential drop detecting device 6, PD meter 7 and tested cable 8.
Embodiment
Below in conjunction with accompanying drawing, content of the present utility model is described further:
Accompanying drawing is depicted as cable ac voltage withstanding and oscillation wave partial discharge testing apparatus schematic diagram.Comprise frequency conversion main frame 1, exciting transformer 2, synchronous optical fiber 3, high-voltage switch gear 4, resonance reactor 5, dividing potential drop detecting device 6, PD meter 7 and tested cable 8.
The utility model is on the basis of the humorous pressure-resistant apparatus of AC frequency conversion string, develop and exchange decay damped oscillation wave apparatus, on common AC frequency conversion series resonance pressure-resistant apparatus, additional peak value synchronizing signal, and high-voltage switch gear makes series resonant tank when peak value, stop power stage, and while closed high switch, form wave of oscillation damped oscillation, carry out cable local discharge test.Can find reliably the faint insulation defect of cable and cable splice, and can accurately locate.
Shown in by specification accompanying drawing, the synchronizable optical optical fiber signaling being come by frequency converter is input in high-voltage switch gear module, the output-parallel of high-voltage switch gear module and exciting transformer.A special dividing potential drop detecting device, has substituted traditional voltage divider.Except having the function of high voltage detection, adopted special detection technology, thereby effectively extracted the Partial discharge signal under test product ac voltage withstanding.By high speed degree of depth storage of collected plate, carry out A/D conversion, by wireless transmission be emitted to PD meter process and data show.Package unit can automatically carry out continuous pressure and repeatedly measure the actual service condition of more pressing close to cable. and can effectively get rid of the interference in Partial discharge signal by the comparison of measurement data repeatedly, and make measurement data more accurate.
During equipment test, exchange the humorous pressure-resistant apparatus of string and by rules requirement, tested cable is carried out the withstand voltage test of stipulated time.When finishing, carry out wave of oscillation damping office and put test.The method is better than former direct current wave of oscillation damping shelf depreciation test, the shelf depreciation of test product the cable cable in the stipulated time and cable end insulation defect in AC voltage withstand test is fully exposed, repeatedly test product pressurization sampling, makes the measurement of shelf depreciation more reliable continuously and automatically.
Claims (3)
1. a cable ac voltage withstanding and oscillation wave partial discharge testing apparatus, comprise frequency converter, high-voltage switch gear module, dividing potential drop detecting device, resonance reactor and data acquisition process unit, it is characterized in that: the synchronizable optical optical fiber signaling from frequency converter is input in high-voltage switch gear module, synchronizable optical optical fiber signaling is controlled high-voltage switch gear action, frequency converter is comprised of frequency conversion main frame and exciting transformer, the output-parallel of high-voltage switch gear module and exciting transformer, dividing potential drop detecting device separative power power supply disturbs and detects test product Partial discharge signal.
2. cable ac voltage withstanding according to claim 1 and oscillation wave partial discharge testing apparatus, is characterized in that: frequency conversion main frame produces interchange decay damp oscillatory wave continuously and automatically carries out continuous pressure.
3. cable ac voltage withstanding according to claim 1 and oscillation wave partial discharge testing apparatus, it is characterized in that: data acquisition process unit carries out A/D conversion by high speed degree of depth storage of collected plate, by wireless transmission be emitted to PD meter process and data show.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320567306.6U CN203422447U (en) | 2013-09-13 | 2013-09-13 | Alternating current withstanding voltage and oscillatory wave partial discharge test device for cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320567306.6U CN203422447U (en) | 2013-09-13 | 2013-09-13 | Alternating current withstanding voltage and oscillatory wave partial discharge test device for cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203422447U true CN203422447U (en) | 2014-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320567306.6U Expired - Fee Related CN203422447U (en) | 2013-09-13 | 2013-09-13 | Alternating current withstanding voltage and oscillatory wave partial discharge test device for cable |
Country Status (1)
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| CN (1) | CN203422447U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103809092A (en) * | 2014-02-19 | 2014-05-21 | 广西电网公司电力科学研究院 | Test equipment for partial discharge of oscillatory wave cable based on optical electric field transducer |
| CN103809093A (en) * | 2014-02-19 | 2014-05-21 | 广西电网公司电力科学研究院 | Test equipment for partial discharge of variable-frequency resonant cable based on optical electric field transducer |
| CN105223474A (en) * | 2015-08-19 | 2016-01-06 | 薛建仁 | Based on multiple detection method and the device of the cable partial discharge of series resonance |
| CN107005210A (en) * | 2014-11-03 | 2017-08-01 | 宝马股份公司 | Wave filter for the Electro Magnetic Compatibility of the component of the electrically driven that improves vehicle |
| CN107526012A (en) * | 2017-09-18 | 2017-12-29 | 上海格鲁布科技有限公司 | A kind of series resonance using fixed duty cycle square wave frequency conversion power source is pressure-resistant local discharge test device |
| CN108872857A (en) * | 2018-07-26 | 2018-11-23 | 中国大唐集团科学技术研究院有限公司西北分公司 | A kind of generator scene mixing pressure test device and method |
| CN113608077A (en) * | 2021-06-29 | 2021-11-05 | 深圳供电局有限公司 | Power transmission line test system |
| CN115047302A (en) * | 2022-08-15 | 2022-09-13 | 国网江西省电力有限公司电力科学研究院 | Cable series resonance partial discharge detection system and method based on double transformers |
-
2013
- 2013-09-13 CN CN201320567306.6U patent/CN203422447U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103809092A (en) * | 2014-02-19 | 2014-05-21 | 广西电网公司电力科学研究院 | Test equipment for partial discharge of oscillatory wave cable based on optical electric field transducer |
| CN103809093A (en) * | 2014-02-19 | 2014-05-21 | 广西电网公司电力科学研究院 | Test equipment for partial discharge of variable-frequency resonant cable based on optical electric field transducer |
| CN103809092B (en) * | 2014-02-19 | 2016-08-17 | 广西电网公司电力科学研究院 | The wave of oscillation cable local discharge test equipment of optically-based electric-field sensor |
| CN103809093B (en) * | 2014-02-19 | 2016-08-17 | 广西电网公司电力科学研究院 | The frequency conversion resonance vibration cable local discharge test equipment of optically-based electric-field sensor |
| CN107005210A (en) * | 2014-11-03 | 2017-08-01 | 宝马股份公司 | Wave filter for the Electro Magnetic Compatibility of the component of the electrically driven that improves vehicle |
| CN105223474A (en) * | 2015-08-19 | 2016-01-06 | 薛建仁 | Based on multiple detection method and the device of the cable partial discharge of series resonance |
| CN107526012A (en) * | 2017-09-18 | 2017-12-29 | 上海格鲁布科技有限公司 | A kind of series resonance using fixed duty cycle square wave frequency conversion power source is pressure-resistant local discharge test device |
| CN107526012B (en) * | 2017-09-18 | 2023-09-29 | 上海格鲁布科技有限公司 | Series resonance voltage-withstanding partial discharge test device adopting fixed duty ratio square wave variable frequency power supply |
| CN108872857A (en) * | 2018-07-26 | 2018-11-23 | 中国大唐集团科学技术研究院有限公司西北分公司 | A kind of generator scene mixing pressure test device and method |
| CN113608077A (en) * | 2021-06-29 | 2021-11-05 | 深圳供电局有限公司 | Power transmission line test system |
| CN115047302A (en) * | 2022-08-15 | 2022-09-13 | 国网江西省电力有限公司电力科学研究院 | Cable series resonance partial discharge detection system and method based on double transformers |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Tengfei Inventor after: Lu Zhengxian Inventor after: Xiao Yefan Inventor after: Zhou Jin Inventor after: Chen Long Inventor before: Zhang Tengfei Inventor before: Lu Zhengxian |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: ZHANG TENGFEI LU ZHENGXIAN TO: ZHANG TENGFEI LU ZHENGXIAN XIAO YEFAN ZHOU JIN CHEN LONG |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140205 Termination date: 20170913 |
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| CF01 | Termination of patent right due to non-payment of annual fee |