高土壤电阻率小型变电站降阻策略研究  

Grounding Resistance Reduction Strategies for Small Substations in High Soil Resistivity Areas

作　　者：翟宇婧 王桂斌 赵光辉 王福达 董恒 李亚莎[2] 刘任[2] ZHAI Yujing;WANG Guibin;ZHAO Guanghui;WANG Fuda;DONG Heng;LI Yasha;LIU Ren(State Nuclear Power Planning and Design Institute Co.,Ltd.,Beijing 100095,China;School of Electrical Engineering and New Energy,Three Gorges University,Yichang 443000,China)

机构地区：[1]国核电力规划设计研究院有限公司,北京100095 [2]三峡大学电气与新能源学院,宜昌443000

出　　处：《智慧电力》2025年第4期119-126,共8页Smart Power

基　　金：国家自然科学基金资助项目(52407009)。

摘　　要：为应对高土壤电阻率地区小型变电站接地电阻过高带来的设备运行和人员安全隐患问题,以某高土壤电阻率地区的小型220 kV变电站为例,设计并优化其接地系统模型。使用仿真软件及模型等效法构建深井接地模型,选取不同的井深、井的等效直径及不同电阻率降阻剂作为关键变量,系统分析深井接地策略对接地电阻、地电位升高及接触电压等参数的影响。仿真结果表明,所提接地电阻降低策略满足设计要求。To address the equipment operation and personnel safety hazards caused by excessively high grounding resistance in small substations located in high soil resistivity areas,this study takes a small 220 kV substation in a high soil resistivity region as an example to design and optimize its grounding system model.A deep-well grounding model was constructed using simulation software and the model equivalence method.Key variables such as well depth,equivalent diameter of the well,and resistivity-reducing agents were selected to systematically analyze the effects of the deep well grounding strategy on parameters including grounding resistance,ground potential rise,and contact voltage.The simulation results demonstrate that the proposed grounding resistance reduction strategy meets the design requirements.

关 键 词：高土壤电阻率 小型变电站 220 kV变电站 深井接地 

分 类 号：TM862[电气工程—高电压与绝缘技术]