Calculation of Mixed Electric Field on the Body Surface of Live Workers on UHV AC/DC Transmission Lines in the Same Corridor

2021 International Conference on Power System Technology (POWERCON) Pub Date : 2021-12-08 DOI:10.1109/powercon53785.2021.9697755

A. Ma, Yongxiang Bi, Xintao Chen, Jie Wang

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Abstract

When UHV AC and UHV DC lines run in the same corridor, the AC/DC mixed electric field in the live working area is more complex. To ensure the safety of workers, it is essential to accurately analyze the electric field on the surface of workers to guide safety protection. In this paper, combined with the actual ±1100kV DC and 1000kV AC lines, a three-dimensional calculation model is established. The mixed field strength on the body surface of live working operator is calculated by using the three-dimensional charge simulation method and Deutsch hypothesis, and the distribution law of mixed field strength on the body surface of worker is analyzed. The results show that when the distance between the operator and the conductor is 0.4m, the maximum electric field on the body surface reaches 1921kV/m. The method can predict the mixed electric field on the body surface when the operators carry out live working on the AC/DC corridor line, and provide the theoretical basis for the live working on the parallel UHV AC DC line.

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同一走廊特高压交直流输电线路现场作业人员体表混合电场计算

当特高压交流和特高压直流线路在同一走廊内运行时，带电工作区的交直流混合电场更为复杂。为了保证作业人员的安全，准确分析作业人员表面的电场以指导安全防护至关重要。本文结合实际的±1100kV直流和1000kV交流线路，建立了三维计算模型。采用三维电荷模拟方法和Deutsch假设计算了现场作业人员体表混合场强，分析了井下作业人员体表混合场强的分布规律。结果表明，当操作者与导体距离为0.4m时，体表电场最大可达1921kV/m。该方法可以预测操作人员在交直流走廊线上带电作业时体表混合电场，为并联特高压交直流线上带电作业提供理论依据。

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2021 International Conference on Power System Technology (POWERCON)

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