水下地网在山区高土壤电阻率地区变电站接地网改造中的应用  

Application of Underwater Grounding Grid to Transformation of Substation Grounding Grid in Mountain Regions with High Soil Resistivity

作　　者：刘浔[1] 文远芳[1] 张大鹏[2] 徐伟[3] 

机构地区：[1]华中科技大学电气与电子工程学院,湖北武汉430074 [2]中南电力设计院,湖北武汉430071 [3]广东省电力设计研究院,广东广州510600

出　　处：《水电能源科学》2010年第11期149-151,共3页Water Resources and Power

基　　金："十一五"国家科技支撑计划基金资助重点项目(2008BAC36B00)

摘　　要：针对山区变电站易受雷击,而山区的土壤电阻率偏高,变电站接地网的接地电阻难以降低,提出了在山区高土壤电阻率地区的变电站接地网改造中利用附近湖泊设置水下地网,通过仿真计算分析了几种具体的实施方案,并选择一个方案在某高山变电站实施了接地网改造,改造后的实测结果表明该方案正确、有效,可供借鉴。In mountain areas,the transformer substations are vulnerable to lightning because of frequent lightning activities,and the soil resistivity is high,it is difficult to reduce grounding resistance of substation grounding grids.This paper introduces forming underwater grounding grid by using nearby lake in transformation of substation grounding grid in mountain regions with high soil resistivity.Several detailed plans are analyzed by simulation calculation.A program has been implemented in a transformation of substation grounding grid in a mountain area.Correctness and effectiveness of the method has been confirmed by actual measurement data,which provides reference for engineering application.

关 键 词：高土壤电阻率地区 变电站接地网 改造 水下地网 接地电阻 

分 类 号：TM862[电气工程—高电压与绝缘技术]