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Research on the Effects and Evaluation Method of Transmission Line Tower Grounding Collection Caused by DC Current

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7 Author(s)
Wu Chi ; Sichuan Electr. Power Res. Inst., Chengdu, China ; Yang Wei ; Zhu Ke ; Dong Xiao-hui
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Taking actual parameters of a grounding electrode and nearby transmission line tower of an ±800kV Ultra hvdc transmission project under construction as example, the electrical model of the DC grounding electrode, transmission line, ground wire and tower grounding body and corresponding soil model are built under CDEGS(Current Distribution, Electromagnetic Fields, Grounding and Soil Structure Analysis) in this paper. The DC current flowing in transmission line tower grounding body and its distribution character are fully and systematically researched by solving the Maxwell equations directly. According to the total amphere hours and operation mode of grounding electrode in designed life, the corrosion quantity of single base tower grounding body is obtained. The research results can be applied in DC grounding electrode design and similar problems.

Published in:

Power and Energy Engineering Conference (APPEEC), 2011 Asia-Pacific

Date of Conference:

25-28 March 2011

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