宁波110kV裘村变电所接地改造分析

针对宁波110 kV裘村变电所原接地网设计不合理、接地电阻超标并经多次改造仍无法达到设计要求等问题进行了分析;根据变电所的周边地形、现场土壤电阻率等因素的调查和测试,结合规程和实际条件,提出了在河中做水平外引以降低接地电阻的方案。计算分析结果表明,该方案降阻效果明显,能将接地电阻降至目标值以下。认为接地系统设计时应合理地利用变电所周边现有的地理条件,因地制宜,采取经济、合理、可靠的措施来有效降低接地电阻。

Analysis on Grounding Reconstruction of 110 kV Qiucun Substation in Ningbo

It was analyzed that the unreasonable design of grounding grid at 110 kV Qiucun sub-station in Ningbo,and the problem of extra high grounding resistance which was still unable to meet the design requirement after several reconstruction.According to the survey and test on the factor such as terrain around the substations and on-site soil resistivity,combined with regulations and actual con-ditions the program of grounding grids horizontal extension in river was proposed to reduce the ground-ing resistance.Ca...