Study on the Impact of UHV AC Composite Cross-arms on Live Working Safety

doi:10.11930/j.issn.1004-9649.201905099

Abstract

Abstract: The UHV AC composite cross-arm structure, quite different from the conventional towers, has a significant impact on the safety distance of live working, the mode of entering or exiting equipotential, and the electric field protection requirements of workers. This paper analyzes the influence of UHV AC composite cross-arm on the safety of live working through experiments and simulation calculations. As the simulation results show, the minimum approach distance and the minimum combined gap distance of live working on the UHV composite cross-arm line are 5.6 m and 6.0 m respectively, which are 0.3 m and 0.4 m higher than the conventional tower requirements. For the power line on the UHV AC composite cross-arm, we can enter the equipotential along the composite cross-arm. When entering or exiting equipotential along the UHV AC composite cross-arm, the workers have the maximum electric field strength on their heads and shoulders, with a magnitude being higher than that of the conventional tower. This areas are therefore should be protected specially during live working. The results of this paper can provide a technical support for the safety of live working on UHV AC composite cross-arm lines.

Key words: UHV, composite cross-arm, live working, safety distance, working mode, electric field protection

CLC Number:

TM84

LEI Xinglie, PENG Yong, XIAO Bin, LIU Ting, LIU Kai, ZHANG Zhun. Study on the Impact of UHV AC Composite Cross-arms on Live Working Safety[J]. Electric Power, 2019, 52(12): 54-61.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201905099

https://www.electricpower.com.cn/EN/Y2019/V52/I12/54

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