特高压GIS变电站接地设计影响因素研究  

Study of the Effect in the GIS Substation Grounding Design

作　　者：刘铜锤 姜龙 LIU Tongchui;JIANG Long(State Grid Ningbo Power Supply Company,Ningbo 315200,China)

机构地区：[1]国家电网公司宁波供电公司,浙江宁波315200

出　　处：《山东电力技术》2020年第10期31-35,共5页Shandong Electric Power

摘　　要：特高压GIS变电站相继投运,短路电流随着变电站容量的增大而越来越大,提高变电站的散流能力和接地性能是接地设计中的重要指标。而短路电流的不同入地方式对接地网性能产生较大影响。采用CDEGS软件建立特高压GIS变电站接地系统模型,分析短路电流不同入地方式、不同接地网材料和土壤电阻率典型影响因素对接地设计的影响。垂直接地极在特高压GIS变电站接地网中广泛应用,考虑垂直接地极的布置位置、数量等因素对接地设计的影响,为特高压GIS变电站接地设计提供依据。With more ultra high voltage(UHV)GIS substation going into operation,the fault short-circuits current will increase as the capacity of the UHV GIS substation becomes larger.How to improve the capacity of the short-circuit current flowing and the grounding performance is an important index in the grounding design.Moreover,the different manners of current flowed into the soil has a great impact on the grounding performance of the grounding grid.A UHV GIS substation grounding system model is established,and the effect of the manner of current flowing into the soil,different grounding material,and soil resistivity in the grounding design is analyzed and studied.Also,the vertical earth electrode is widely used in the GIS substation grounding network.The paper study the effect for the location and amount of the vertical earth electrode in the UHV GIS substation.

关 键 词：集中入地 分布入地 接地性能 垂直接地极 

分 类 号：TM63[电气工程—电力系统及自动化]