变电站接地网的降阻措施及工程实践

Measures for Reducing Resistance for Grounding Grid in Substation and Engineering Practice

介绍变电站接地网电阻过高的危害,分析将垂直接地体置于最佳埋置深度、采用不等长接地体技术及使用长效防腐降阻剂等降阻措施的原理,结合110kV浆水变电站接地电阻过高的实际情况,采取降阻措施对接地网进行优化,经优化后的接地网电阻降低,满足规程要求。

This paper presents the harm of the higher grounding grid resistance,and analyses the principles of main measures for reducing resistance,such as the best buried depth of vertical grounding electrodes,the technology of long and short grounding electrodes and the long acting anticorrosive agent for reducing resistance.According to the 110 kV Jiangshui substation,several measures for reducing resistance are utilized to optimize the grounding grid.After the optimization,the grounding grid resistance is effectively reduced to meet the requirement of relative specifications.