一类垂直双层土壤中地网接地电阻的简易计算公式.pdf.pdf

第 29 卷第 1 期中国电机工程学报 Jan. 5, 2009 120 2009 年 1 月 5 日 Proceedings of the CSEE ?2009 . 文章编号: 0258-8013 (2009) 01-0120-07 中图分类号: TM 63 文献标志码: A 学科分类号: 470 ? 40 一类垂直双层土壤中地网接地电阻的简易计算公式曹晓斌 1 ,胡劲松 2 ,余波 2 ,张血琴 1 ,吴广宁 1 ,周炜明 1 ,李生林 1 (1 .西南交通大学电气工程学院,四川省成都市 610031 ; 2 .西南电力设计院,四川省成都市 610021) A Simplified Formula for Grounding Grids Resistance in a Type of Vertical Two-layer Soil CAO Xiao-bin 1, HU Jin-song 2 , YU Bo 2, ZHANG Xue-qin 1, WU Guang-ning 1, ZHOU Wei-ming 1 , LI Sheng-lin 1 (1. School of Electrical Engineering, Southwest Jiao tong University, Chengdu 610031, Sichuan Province, China; 2. Southwest Electric Power Design Institu te, Chengdu 610021, Sichuan Province, China) ABSTRACT: As grounding grids of ultra high voltage (UHV) substation are usually buried vert ically across soil layers, a new method was presented for calc ulating ground resistance of grounding grids in vertical two-layer soil. The ratio of unknown ground resistance to refe rence ground resistance and the ratio of soil resistivity beside the interface of vertical two-layer soil were defined to reduce the number of parameters and simplify the analysis. The functional relation of these two ratios was obtained by data fitting. Coeffi cient expressions of the function were gained by analyzing the soil struct