高土壤电阻率地区变电站接地网的改造及分析  

Analysis and Reconstruction of Grounding Grid on High Soil Resistance Regions Transformer Substation

作　　者：赵爱华[1] 王庆军[1] 姬春义[2] 邵进 

机构地区：[1]安徽省电力科学研究院,安徽合肥230601 [2]安徽省电力设计院,安徽合肥230601 [3]安徽省超高压公司,安徽合肥230022

出　　处：《安徽电力》2012年第1期49-51,共3页Anhui Electric Power

摘　　要：安徽省某高土壤电阻率地区变电站大型接地网因接地电阻不满足标准要求进行了深井接地改造,该接地网改造前接地电阻实测值为0.85Ω,第1期打了8口深井,改造后接地电阻降为0.692Ω;第2期打了9口深井,改造后接地电阻降为0.467Ω。为研究导致两期改造效果差别较大的原因,理论计算了第1期各个深井的接地电阻值,并通过专业软件数值计算了第1期、第2期改造前后整个接地网的接地电阻。研究结果表明,深井打到的地下低阻区域情况的差异是影响深井接地网接地电阻改造的主要原因。A substation grounding grid in high soil resistance region in Anhui province carries out a deep well grounding modification because the grounding resistance can not meet the states＇ requirement The grid＇s grounding resistance measures 0.85Ωs before this modification.The grounding resistance of substation grid drops to 0.692Ωs for the 8 deep wells drilled at the first stage, and 0.467Ωs for the 9 deep wells at the second stage.To find the reasons that lead to the big differences for the two stages＇ modifications,the authors calculates every deep well＇s grounding resistance theoretically,also they calculate the whole grid＇s grounding resistance after the two stages＇ modifications through professiona software.The research shows that the differences of low resistance region at the deep ends of the wells are the main reasons that impact the modification of the deep wells.

关 键 词：变电站 高土壤电阻率 接地网 深井接地 改造 低阻区域 

分 类 号：TM63[电气工程—电力系统及自动化]