Test Voltage Optimization and Safety Margin of Insulation Tools for Live Working of UHV AC Transmission Lines

doi:10.11930/j.issn.1004-9649.202006146

Abstract

Abstract: In view of the problem that the test voltage of live working insulation tools for 1 000 kV UHV AC transmission lines is too high, causing abnormal damage to the work tools, we made an in-depth analysis of the power frequency and operating overvoltage level for the live working condition of 1 000 kV AC transmission lines. And at the same time, a research was carried out on the voltage selection and safety margin for the 1 000 kV UHV live working insulation tool test. After comprehensive analysis, the reasonable test voltage and safety margin range are put forward, and the proposed revision values are verified by a number of tests including power frequency withstand voltage test, insulation material electrical performance test and live working safety test, which have fully proved the rationality of the proposed revision values.

Key words: UHV AC transmission, live working, insulation tools, test voltage, voltage revision

ZHU Kai, FANG Yuqun, YU Guangkai. Test Voltage Optimization and Safety Margin of Insulation Tools for Live Working of UHV AC Transmission Lines[J]. Electric Power, 2021, 54(7): 132-140.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202006146

https://www.electricpower.com.cn/EN/Y2021/V54/I7/132

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