大型工矿企业总降接地网设计机辅分析  

Computer-Aided Design and Analysis of the Grounding System of the Stepdown Substation for the Large-scale Industrial and Mining Enterprise

作　　者：黄小银[1] 陈恳[1] 程晓煜[2] 唐俊娥[1] 

机构地区：[1]南昌大学信息工程学院,南昌330031 [2]江西省电力设计院,南昌330031

出　　处：《电网与清洁能源》2010年第7期53-56,72,共5页Power System and Clean Energy

基　　金：江西省科技支撑计划项目(50177007)

摘　　要：从某一拟新建110kV总降变电所所址的实测土壤电阻率出发,提出一种基于CYMEGRD计算机辅助分析的接地网设计方法。主要内容包括:现场视在接地电阻率测量,得到土壤结构模型;计算出水平不均匀分层土壤条件下不同地网结构的接地电阻;分析并设计得到更经济合理的地网结构;给出地网的电位升、接触电压和跨步电压的分布图。同时提出采用生物菌接地降阻剂改善土壤电阻率。Starting from the realmeasured soil resistivity of a proposed 110 kV stepdown substation, this paper proposes a new design method for the grounding system based on CYMEGRID computeraided analysis. This method includes, first, obtaining the soil model via analyzing the onsite apparent resistivity; second calculating the grounding resistance of different grounding system structures in the nonuniform layered soil conditions; third designing a more economical and reasonable grounding structure fourth, giving the potential rise, touch voltage and step voltage distribution diagram. In addition, this paper also presents a biological bacteria resistancereduction agent which can be used to improve the soil resistivity.

关 键 词：CYMGRD 接地网 双层土壤模型 生物菌降阻剂 

分 类 号：TM81[电气工程—高电压与绝缘技术]