不同线型高压直流输电导线表面电场强度分布的计算

doi:10.19595/j.cnki.1000-6753.tces.L80721

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Abstract The study of the surface field distribution on high-voltage direct current (HVDC) transmission lines of different line-type structures and its characteristics are the basic work for understanding and improving the electromagnetic environment of transmission lines. In this paper, an optimized semi-numerical method has been proposed for calculating the electric field on the surface of the line, and the computation efficiency is greatly improved by introducing dimensionless electric field. The semi-analytical method is then used to evaluate the surface field distribution of two line-type structures. It is shown that the maximum surface field of the round stranded wire is obtained in the middle of each arc of the outermost layer of the line, which is 1.394 times the value of the smooth conductor of the same radius; the maximum surface field of the shaped wire is obtained near the intersection of the bigger arc and the smaller arc of the outermost layer of the aluminum conductor, which is about 1.23 times the value of the smooth conductor of the same radius, and the ratio remains un-changed with the variation of the number of turns of the aluminum conductor and the line radius. These results are consistent with the study, and prove the validity of the calculation method.

Key words： High-voltage direct current (HVDC) surface field strength semi-numerical approach round stranded wire typed wire

Received: 30 June 2018 Published: 29 July 2019

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TM72

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	Hao Jianhong
	Wang Hui

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Hao Jianhong,Wang Hui. Calculation of the Surface Electric Field Distribution of High-Voltage Direct Current Transmission Line[J]. Transactions of China Electrotechnical Society, 2019, 34(zk1): 14-21.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L80721 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/Izk1/14

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