CN202351379U - Test system for simultaneously implementing voltage withstanding test and local discharge measurement of high-voltage cable - Google Patents
Test system for simultaneously implementing voltage withstanding test and local discharge measurement of high-voltage cable Download PDFInfo
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- CN202351379U CN202351379U CN 201120454942 CN201120454942U CN202351379U CN 202351379 U CN202351379 U CN 202351379U CN 201120454942 CN201120454942 CN 201120454942 CN 201120454942 U CN201120454942 U CN 201120454942U CN 202351379 U CN202351379 U CN 202351379U
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- 238000012360 testing method Methods 0.000 title claims abstract description 37
- 238000005259 measurement Methods 0.000 title claims abstract description 33
- 238000010276 construction Methods 0.000 claims abstract description 16
- 239000013307 optical fiber Substances 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 229940085805 fiberall Drugs 0.000 claims description 3
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- 230000007547 defect Effects 0.000 abstract 1
- 238000007689 inspection Methods 0.000 abstract 1
- 230000002950 deficient Effects 0.000 description 10
- 238000009413 insulation Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
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- 238000001514 detection method Methods 0.000 description 1
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Abstract
The utility model relates to a distributed local discharge measurement test system based on voltage withstanding test of a high-voltage cable. The system consists of hardware devices such as an alternating-current variable frequency resonant power supply without local discharge, a high-voltage power cable circuit, a cable terminal, cable joints, a high-frequency local discharge sensor, signal acquisition units, an optical fiber and a measurement host; and the voltage withstanding test and the distributed local discharge measurement test are simultaneously implemented. Through the system, certain small local defects which cannot be detected in the voltage withstanding test of the high-voltage cable circuit can be effectively and timely detected, the problem of signal attenuation produced during local discharge is measured from one end is solved, and an effective and sensitive method is provided for inspection and judgment of the construction quality and the insulating quality of the high-voltage cable circuit.
Description
Technical field
The utility model relates to when checking and accepting high-tension cable completion circuit at the scene, to the test method that cable system construction quality and insulation quality are tested and judged, carries out the pilot system of measurement of partial discharge simultaneously for a kind of high-tension cable withstand voltage test.
Background technology
According to existing high-tension cable completion test standard, cable line should be able to detect owing to transport and lay the bigger defective that causes through after the withstand voltage test, still still exists some behind overtesting, at the example that puts into operation and just puncture soon.Main cause is because withstand voltage test can not more detected little offices be put defective.Voltage Cable Lines Construction is after operation a period of time, and these little offices put defective and enlarge gradually, finally cause the puncture of cable line.At present, all cable lines are checked and accepted the requirement that the commissioning test standard all only relates to withstand voltage test, like Q/GDW371, IEC60270, IEC60840 etc., do not propose the shelf depreciation requirement.And for check cable completion line construction quality and insulation quality, measurement of partial discharge is the most effective and sensitive means.
Summary of the invention
The problem that the utility model will solve is: when high-tension cable completion circuit is carried out onsite acceptance; Withstand voltage test can not detect some little offices and put defective; Judge cable system construction quality and insulation quality for check more strictly, need a kind of test method directly perceived, desirable, effective.The decay of local discharge signal on high-tension cable simultaneously launches with exponential manner; Research shows that every kilometer attenuation rate reaches 90%; According to CIGRE D1.33 " Limits of on-site PD measurement on extruded power cables using IEC method "; Under optimum field condition, the measurement of partial discharge of 50pC can only be realized on the cable of 2 kilometers following length.And mostly Voltage Cable Lines Construction is long distance line, so the Partial Discharge Detection of high-tension cable completion circuit can not adopt the conventional mode of carrying out from the termination.
The technical scheme of the utility model is: the pilot system of measurement of partial discharge is carried out in the high-tension cable withstand voltage test simultaneously; Pilot system comprises: AC frequency conversion resonance vibration power supply, Voltage Cable Lines Construction, cable termination, cable splice, high frequency partial discharge sensor, local discharge signal collecting unit, optical fiber and measurement host are put in no office; High frequency partial discharge sensor and local discharge signal collecting unit are installed on the ground wire of each cable splice or cross interconnected line; High frequency partial discharge sensor signal is transferred to the local discharge signal collecting unit through concentric cable; Through optical fiber all local discharge signal collecting units are joined end to end; Finally receive on the measurement host that is positioned at the Voltage Cable Lines Construction end, the high frequency partial discharge sensor is installed on the ground wire of 2 cable terminations.
High frequency partial discharge sensor signal frequency is 2MHz～8MHz.
Measurement host is placed in the pulpit of withstand voltage test equipment, and each local discharge signal collecting unit adopts powered battery.
The utility model carries out measurement of partial discharge in withstand voltage test; Great constructional deficiency is found in withstand voltage test; The measurement of partial discharge that carries out simultaneously can be found the small shelf depreciation defective that possibly exist in the cable accessory; These small defectives can not be found by simple withstand voltage test, when carrying out withstand voltage test, carry out distributed measurement of partial discharge, the shelf depreciation defective that exists in measured X LPE insulated power cable and the annex thereof exactly.The signal frequency of the high frequency partial discharge sensor that the utility model is confirmed has sensitivity preferably; Carry out measurement of partial discharge at each cable splice; Be aggregated into measurement host by optical fiber then; This distributed shelf depreciation the measurement effective range of shelf depreciation be limited in the joint annex approximately+/-300 meters scopes in, lowered the difficulty of point of discharge location greatly.
Description of drawings
Fig. 1 is the distributed measurement of partial discharge pilot system figure based on the high-tension cable withstand voltage test of the utility model.
Embodiment
When the high-tension cable completion test is checked and accepted, mainly be through the defective mounting of on-the-spot withstand voltage test check cable splice and the damage in the cable transportation installation process.The test experience shows that the withstand voltage test of carrying out according to the IEC standard can well produce a desired effect.Problem of manufacturing qualities for cable body should be checked by the cable delivery test, but the cable body breakdown accident also occurred in recent years.Therefore when final acceptance of construction is tested, following requirement has been proposed:
● the small shelf depreciation defective that exists in the discovery cable body
● the small shelf depreciation defective that exists in the discovery cable splice, 1 hour withstand voltage test can not puncture it.
In addition, owing to the attenuation of cable to high-frequency signal, shelf depreciation if take place in the place that the range observation end is far away, and its signal is transferred to the big high attenuation of measuring junction meeting, and is different according to survey frequency, every kilometer length cables, and signal attenuation can reach 90% sometimes.Therefore, the method at the additional measurement of partial discharge of cable line one end commonly used is only applicable to the relatively shorter situation of cable line length.According to testing experience for many years, in midium voltage cable, because the joint discharge can reach the thousands of pC of hundreds of; Influence to cable is little, but in high-tension cable, very little discharge capacity is enough to cable is produced fatal harm; The method of putting with an end survey bureau detects micro-discharge capacity, is very difficult.
The system of the utility model carries out distributed measurement of partial discharge when carrying out cable final acceptance of construction test.Like Fig. 1; Pilot system comprises: AC frequency conversion resonance vibration power supply A, Voltage Cable Lines Construction, cable termination C, cable splice D1-D6, high frequency partial discharge sensor, local discharge signal collecting unit E1-E6, optical fiber and measurement host B are put in no office; High frequency partial discharge sensor and local discharge signal collecting unit are installed on the ground wire of each cable splice or cross interconnected line; High frequency partial discharge sensor signal is transferred to the local discharge signal collecting unit through concentric cable; Through optical fiber all local discharge signal collecting units are joined end to end; Finally receive on the measurement host that is positioned at the Voltage Cable Lines Construction end, the high frequency partial discharge sensor is installed on the ground wire of 2 cable terminations; Before the test; Cross interconnected line and ground wire to cable splice carry out cross-over connection; The high frequency partial discharge sensor connects bonding line; On the ground wire of cable termination, obtain measurement synchronization signal F with the electric current coupling coil, total system is by the measurement of said all check points of synchronized, in the process of withstand voltage test; No office puts the AC frequency conversion resonance vibration power supply withstand voltage test is carried out in Voltage Cable Lines Construction pressurization, and all intermediate cable joints and two cable terminations to Voltage Cable Lines Construction carry out measurement of partial discharge simultaneously simultaneously.
Claims (3)
1. the pilot system of measurement of partial discharge is carried out in the high-tension cable withstand voltage test simultaneously; It is characterized in that pilot system comprises: AC frequency conversion resonance vibration power supply, Voltage Cable Lines Construction, cable termination, cable splice, high frequency partial discharge sensor, local discharge signal collecting unit, optical fiber and measurement host are put in no office; High frequency partial discharge sensor and local discharge signal collecting unit are installed on the ground wire of each cable splice or cross interconnected line; High frequency partial discharge sensor signal is transferred to the local discharge signal collecting unit through concentric cable; Through optical fiber all local discharge signal collecting units are joined end to end; Finally receive on the measurement host that is positioned at the Voltage Cable Lines Construction end, the high frequency partial discharge sensor is installed on the ground wire of 2 cable terminations.
2. the pilot system of measurement of partial discharge is carried out in high-tension cable withstand voltage test according to claim 1 simultaneously, it is characterized in that high frequency partial discharge sensor signal frequency is 2MHz～8MHz.
3. the pilot system of measurement of partial discharge is carried out in high-tension cable withstand voltage test according to claim 1 and 2 simultaneously, it is characterized in that measurement host is placed in the pulpit of withstand voltage test equipment, and each local discharge signal collecting unit adopts powered battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120454942 CN202351379U (en) | 2011-11-17 | 2011-11-17 | Test system for simultaneously implementing voltage withstanding test and local discharge measurement of high-voltage cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120454942 CN202351379U (en) | 2011-11-17 | 2011-11-17 | Test system for simultaneously implementing voltage withstanding test and local discharge measurement of high-voltage cable |
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| CN202351379U true CN202351379U (en) | 2012-07-25 |
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| CN 201120454942 Expired - Fee Related CN202351379U (en) | 2011-11-17 | 2011-11-17 | Test system for simultaneously implementing voltage withstanding test and local discharge measurement of high-voltage cable |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048635A (en) * | 2012-12-21 | 2013-04-17 | 中国电力科学研究院 | Anti-interference performance evaluation method for high voltage cable partial discharge on-line monitoring device |
| CN103076545A (en) * | 2012-12-31 | 2013-05-01 | 广州供电局有限公司 | Electrified length measurement and local discharge detection and positioning simulation system for high voltage cable |
| 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 |
| CN105044579A (en) * | 2015-06-05 | 2015-11-11 | 北京兴迪仪器有限责任公司 | Measurement method for distributed partial discharge |
| CN109254234A (en) * | 2018-11-22 | 2019-01-22 | 云南电网有限责任公司红河供电局 | A kind of trees-wire electrical discharge simulation experiment method |
| CN112904160A (en) * | 2021-01-21 | 2021-06-04 | 东莞市嘉仕新能电子仪器设备有限公司 | Synchronous testing method for high-voltage machine, synchronous high-voltage machine and synchronous high-voltage machine working group |
-
2011
- 2011-11-17 CN CN 201120454942 patent/CN202351379U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048635A (en) * | 2012-12-21 | 2013-04-17 | 中国电力科学研究院 | Anti-interference performance evaluation method for high voltage cable partial discharge on-line monitoring device |
| CN103048635B (en) * | 2012-12-21 | 2015-03-18 | 中国电力科学研究院 | Anti-interference performance evaluation method for high voltage cable partial discharge on-line monitoring device |
| CN103076545A (en) * | 2012-12-31 | 2013-05-01 | 广州供电局有限公司 | Electrified length measurement and local discharge detection and positioning simulation system for high voltage cable |
| CN103076545B (en) * | 2012-12-31 | 2015-09-23 | 广州供电局有限公司 | The charged linear measure longimetry of high-tension cable and Partial Discharge Detection location simulation system |
| 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 |
| 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 |
| CN105044579A (en) * | 2015-06-05 | 2015-11-11 | 北京兴迪仪器有限责任公司 | Measurement method for distributed partial discharge |
| CN109254234A (en) * | 2018-11-22 | 2019-01-22 | 云南电网有限责任公司红河供电局 | A kind of trees-wire electrical discharge simulation experiment method |
| CN112904160A (en) * | 2021-01-21 | 2021-06-04 | 东莞市嘉仕新能电子仪器设备有限公司 | Synchronous testing method for high-voltage machine, synchronous high-voltage machine and synchronous high-voltage machine working group |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING SINDIA INSTRUMENTS CO., LTD. STATE ELECTRI Free format text: FORMER OWNER: BEIJING SINDIA INSTRUMENTS CO., LTD. Effective date: 20130410 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130410 Address after: 210008 Zhongshan Road, Jiangsu, No. 251, Patentee after: Nanjing Power Supply Co., Jiangsu Prov. Power Co. Patentee after: Beijing Sindia Instruments Co., Ltd. Patentee after: State Grid Corporation of China Patentee after: Jiangsu Electric Power Company Address before: 210008 Zhongshan Road, Jiangsu, No. 251, Patentee before: Nanjing Power Supply Co., Jiangsu Prov. Power Co. Patentee before: Beijing Sindia Instruments Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120725 Termination date: 20181117 |
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| CF01 | Termination of patent right due to non-payment of annual fee |