110kV变电站接地电阻改良技术的应用分析

本文以广东珠海红旗110kV变电站为例,简要分析了变电站接地网现状及存在问题,提出了接地改造目标,结合规程和实际条件,选用了重新铺设站内接地网,做水平外引,并采用深井接地的方案。新地网接地参数测量结果表明,接地电阻为0.365Ω,符合目标值0.5Ω的要求。

The Application Analysis of 110kV Substation Grounding Resistance Improvement Technology

Taking the example of Guangdong Zhuhai Hongqi 110kV substation,the paper briefly analyzes the present situation of substation grounding network and the existing problems and proposes the grounding modifying targets. Combining regulations and actual conditions, the new relaying of the station ground grid are selected to do the horizontal lead and the deep well grounding scheme is adopted. The new earth grounding parameter measurement results show that the grounding resistance is 0.365Ω which is consistent with the requirements of the target value 0.5Ω.