Switching Impulse Test of UHV Live Working Insulating Tool and Experimental Electrode Optimization
At present, the electrode arrangement still follows the low voltage level standard when the UHV live-working insulating tools are tested for operation impulse withstand voltage. However, the test voltage and the discharge interval are greatly increased, and discharge often occurs in the non-test cha...
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| Format: | Article |
| Language: | zho |
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State Grid Energy Research Institute
2022-08-01
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| Series: | Zhongguo dianli |
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| Online Access: | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202203063 |
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| author | Guangkai YU Ting LIU Kai ZHU Lin NIE Jiakai LIANG |
| author_facet | Guangkai YU Ting LIU Kai ZHU Lin NIE Jiakai LIANG |
| author_sort | Guangkai YU |
| collection | DOAJ |
| description | At present, the electrode arrangement still follows the low voltage level standard when the UHV live-working insulating tools are tested for operation impulse withstand voltage. However, the test voltage and the discharge interval are greatly increased, and discharge often occurs in the non-test channels such as the interval between insulating tools, and the interval between test electrode and the earth or surrounding frames. For this reason, standard wave switching impulse tests are conducted on the insulating tools used for live-working under typical working conditions and test conditions, and the discharge paths under test conditions are counted. An optimization scheme of using 8-bundle U-shaped analog wires is proposed, and corresponding tests are conducted for verification. The results show that using the 8-bundle U-shaped analog wires can significantly reduce the probability of dispersive discharge in non-test channels. The horizontal spacing of the test specimens shall not be less than 5m due to the presence of air gap arcing. After the test electrode is improved, the discharge voltage of the 6.3-m-long insulating rod is 2417 kV, which is 6.9% higher than that of the standard electrode, 32.1% higher than the minimum discharge voltage under typical working conditions. When the insulating tools are tested for withstand voltage, it is recommended to correct the test voltage according to the withstand voltage requirements of the working conditions. |
| format | Article |
| id | doaj-art-2c5af513c81045f69eb1672e2b7a4ade |
| institution | DOAJ |
| issn | 1004-9649 |
| language | zho |
| publishDate | 2022-08-01 |
| publisher | State Grid Energy Research Institute |
| record_format | Article |
| series | Zhongguo dianli |
| spelling | doaj-art-2c5af513c81045f69eb1672e2b7a4ade2025-08-20T02:52:24ZzhoState Grid Energy Research InstituteZhongguo dianli1004-96492022-08-0155814315010.11930/j.issn.1004-9649.202203063zgdl-55-08-yuguangkaiSwitching Impulse Test of UHV Live Working Insulating Tool and Experimental Electrode OptimizationGuangkai YU0Ting LIU1Kai ZHU2Lin NIE3Jiakai LIANG4China Electric Power Research Institute, State Key Laboratory of Power Grid Environmental Protection, Wuhan 430074, ChinaChina Electric Power Research Institute, State Key Laboratory of Power Grid Environmental Protection, Wuhan 430074, ChinaState Grid Jinhua Power Supply Company, Jinhua 321000, ChinaChina Electric Power Research Institute, State Key Laboratory of Power Grid Environmental Protection, Wuhan 430074, ChinaState Grid Jinhua Power Supply Company, Jinhua 321000, ChinaAt present, the electrode arrangement still follows the low voltage level standard when the UHV live-working insulating tools are tested for operation impulse withstand voltage. However, the test voltage and the discharge interval are greatly increased, and discharge often occurs in the non-test channels such as the interval between insulating tools, and the interval between test electrode and the earth or surrounding frames. For this reason, standard wave switching impulse tests are conducted on the insulating tools used for live-working under typical working conditions and test conditions, and the discharge paths under test conditions are counted. An optimization scheme of using 8-bundle U-shaped analog wires is proposed, and corresponding tests are conducted for verification. The results show that using the 8-bundle U-shaped analog wires can significantly reduce the probability of dispersive discharge in non-test channels. The horizontal spacing of the test specimens shall not be less than 5m due to the presence of air gap arcing. After the test electrode is improved, the discharge voltage of the 6.3-m-long insulating rod is 2417 kV, which is 6.9% higher than that of the standard electrode, 32.1% higher than the minimum discharge voltage under typical working conditions. When the insulating tools are tested for withstand voltage, it is recommended to correct the test voltage according to the withstand voltage requirements of the working conditions.https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202203063uhvlive workinginsulating toolswitching impulsedischarge characteristicselectrode optimization |
| spellingShingle | Guangkai YU Ting LIU Kai ZHU Lin NIE Jiakai LIANG Switching Impulse Test of UHV Live Working Insulating Tool and Experimental Electrode Optimization Zhongguo dianli uhv live working insulating tool switching impulse discharge characteristics electrode optimization |
| title | Switching Impulse Test of UHV Live Working Insulating Tool and Experimental Electrode Optimization |
| title_full | Switching Impulse Test of UHV Live Working Insulating Tool and Experimental Electrode Optimization |
| title_fullStr | Switching Impulse Test of UHV Live Working Insulating Tool and Experimental Electrode Optimization |
| title_full_unstemmed | Switching Impulse Test of UHV Live Working Insulating Tool and Experimental Electrode Optimization |
| title_short | Switching Impulse Test of UHV Live Working Insulating Tool and Experimental Electrode Optimization |
| title_sort | switching impulse test of uhv live working insulating tool and experimental electrode optimization |
| topic | uhv live working insulating tool switching impulse discharge characteristics electrode optimization |
| url | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202203063 |
| work_keys_str_mv | AT guangkaiyu switchingimpulsetestofuhvliveworkinginsulatingtoolandexperimentalelectrodeoptimization AT tingliu switchingimpulsetestofuhvliveworkinginsulatingtoolandexperimentalelectrodeoptimization AT kaizhu switchingimpulsetestofuhvliveworkinginsulatingtoolandexperimentalelectrodeoptimization AT linnie switchingimpulsetestofuhvliveworkinginsulatingtoolandexperimentalelectrodeoptimization AT jiakailiang switchingimpulsetestofuhvliveworkinginsulatingtoolandexperimentalelectrodeoptimization |