| 污秽绝缘子表面电场分布仿真及绝缘特性试验 |
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| 引用本文： | 霍锋,陈勇,蔡炜. 污秽绝缘子表面电场分布仿真及绝缘特性试验[J]. 高电压技术, 2008, 34(12): 2621-2625 |
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| 作者姓名： | 霍锋 陈勇 蔡炜 |
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| 作者单位： | School of Electrical Engineering,Wuhan University;State Grid Electric Power Research Institute |
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| 基金项目： | Project Supported by Key Technology Research Programof SGCC(SGSC[2005]115) |
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| 摘 要： | In this paper,the electrical fields along the insulator surface under different scenarios,such as asymmetric pollution on top/bottom surface,and uneven circumferential distribution of surface pollution,have been calculated with finite element method for field simulation.Tests on artificial pollution insulators are conducted to study the 50% withstand voltage U50 of artificial pollution suspension insulators under different NSDD(non-soluble deposit density)and asymmetric pollution on the top/bottom surface,and study the change of leakage current with air humidity under different voltage and different ESDD(equivalent salt deposit density).The result shows that asymmetric top/bottom surface pollution has a greater impact on the insulator electrical field distribution,and the leakage current will jump under low air humidity,if had large ESDD,which has practical meanings to the anti-pollution design of the transmission line under different pollution levels across the country.
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| 关 键 词： | creepage distance dielectric constant ESDD electrical field finite element method humidity leakage current NSDD suspension insulator surface pollution |
Surface Electrical Field Distribution Simulation and Insulation Characteristics Test of Polluted Insulators |
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| HUO Feng,CHEN Yong,CAI Wei. Surface Electrical Field Distribution Simulation and Insulation Characteristics Test of Polluted Insulators[J]. High Voltage Engineering, 2008, 34(12): 2621-2625 |
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| Authors: | HUO Feng CHEN Yong CAI Wei |
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| Affiliation: | State Grid Electric Power Research Institute,Wuhan 430074,China;Xi'an Jiaotong University,Xi'an 710049,China |
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| Abstract: | In this paper, the electrical fields along the insulator surface under different scenarios, such as asymmetric pollution on top/bottom surface, and uneven circumferential distribution of surface pollution, have been calculated with finite element method for field simulation. Tests on artificial pollution insulators are conducted to study the 50% withstand voltage U50 of artificial pollution suspension insulators under different NSDD(non-soluble deposit density) and asymmetric pollution on the top/bottom surface , and study the change of leakage current with air humidity under different voltage and different ESDD(equivalent salt deposit density). The result shows that asymmetric top/bottom surface pollution has a greater impact on the insulator electrical field distribution, and the leakage current will jump under low air humidity, if had large ESDD, which has practical meanings to the anti-pollution design of the transmission line under different pollution levels across the country. |
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| Keywords: | creepage distance dielectric constant ESDD electrical field finite element method humidity leakage current NSDD suspension insulator surface pollution |
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