输电线路杆塔接地电阻的简化计算-北京大学学报医学版.PDFVIP

第35 卷 第9 期 电 网 技 术 Vol. 35 No. 9 2011 年9 月 Power System Technology Sep. 2011 文章编号：1000-3673 （2011 ）09-0170-06 中图分类号：TM 753 文献标志码：A 学科代码：470·4051 输电线路杆塔接地电阻的简化计算 厉天威，何民，卢本初，程思勇 （广西电力工业勘察设计研究院，广西壮族自治区南宁市 530023 ） Simplified Calculation for Grounding Resistance of Transmission Tower LI Tianwei, HE Min, LU Benchu, CHENG Siyong (Guangxi Electric Power Industry Investigation Design and Research Institute, Nanning 530023, Guangxi Zhuang Autonomous Region, China) ABSTRACT: In the grounding design of high voltage 塔接地设计要求，因此有必要对原有接地型式进行 transmission line the empirical formula is often used to 优化设计。 calculate the grounding resistance of transmission tower, so the 目前国内杆塔接地设计均以文献[1-2]规定的 calculation accuracy is just passable. Considering the 工频接地电阻作为参考。工频接地电阻计算目前已 non-uniformity of the current dispersed from the grounding electrode, a grounding electrode is divided into sections to 有不少经验公式可以使用[3-4]，但该类公式不能准确 calculate their self-resistance coefficients and mutual resistance 计算稍复杂的不规则接地网及接地型式复杂杆塔 coefficients, thus the grounding resistance of grounding 的接地电阻。文献[5-6]利用有限元法对接地电网进 electrode is solved. The number of conductor sections is 行分析，计算结果比较令人满意，但所建模型比较 dependent upon the requirement to computation accuracy, the 复杂。为此，本文将以文献[8-17]为理论基础，并 more the number of the sections, the higher the computational accuracy. Finally, the grounding resistances of grounding 考虑导体扩散电流的不均匀性，对接地导体进行分 electrode usually used for transmission