变电站接地网布置方式及设计规范差异对比分析研究
吴小刚1，于涛2
（1 贵州电力设计研究院，贵州 贵阳 550002；2 中机中联工程有限公司，重庆 400039）
摘 要：根据DL/T 621—1997《交流电气装置的接地》和GB/T 50065—2011《交流电气装置的接地设计规范》中对变电站接地网的相关设计要求，以某500kV变电站土壤电阻率测试结果为基础，对两个规范中用到的工频接地电阻、转移电位、接触电位差、跨步电位差等重要参数指标进行对比计算分析，得出两本规范之间的异同，并分析了差异产生的原因，供相关设计人员参考。
关键词：变电站接地网；接地电阻；接触电压；跨步电压；热稳定校验
中图分类号：TM63 文献标识码：A 文章编号：1007-3175(2016)04-0021-05
Comparative Analysis Between Substation Grounding Grid
Layout and Differences from Design Specifications
WU Xiao-gang1, YU Tao2
（1 Guizhou Electric Power Design & Research Institute, Guiyang 550002, China;
2 CMCU Engineering Co., Ltd, Chongqing 400039, China）
Abstract: According the requirements of grounding grid design in substation which quote from Grounding for AC electrical installations (DL/T 621—1997) and code for design of AC electrical installations earthing (GB/T 50065—2011), based on the earth resistivity test results in 500kV substation, this paper carried out analysis of contrast calculation for important parameter indexes including industrial frequency earthing resistance, shifting potential, contact potential difference and step potential difference between the two specifications. The similarities and differences between the two specifications were obtained and the caused reasons were analyzed to provide references for the relevant designers.
Key words: substation grounding grid; grounding resistance; touch voltage; step voltage; thermal stability test
参考文献
[1] 张波，何金良，曾嵘.电力系统接地技术现状及展望[J].高电压技术，2015，41(8)：2569-2582．
[2] 余晓东.高土壤电阻率地区变电站接地设计与降阻技术研究[D].重庆：重庆大学，2009.
[3] 解云兴.变电站接地系统设计研究[D].济南：山东大学，2014.
[4] 杨小光.变电站接地系统降阻方案及接地材料选择[D].北京：华北电力大学，2011.
[5] DL/T 621—1997 交流电气装置的接地[S].
[6] GB/T 50065—2011 交流电气装置的接地设计规范[S].
