变电站接地网故障诊断技术研究现状

接地网电气连接故障已构成影响电力系统安全运行的重要因素。首先对发生在我国的接地网故障案例进行了总结。然后对国内外现有接地网故障诊断方法进行了调研分析,重点阐述了自然电场法,电阻率法,充电法和极化阻抗法,探地雷达技术等多种不同诊断方法的基本原理,并评价了不同诊断方法的优缺点。

Research on Fault Diagnosis Technology of a Substation Grounded Grid

The electrical linkage fault of the grounded grid has become a key factor that affect electric power system safety operation.First,sum up some grounded grid fault cases that have occurred in our country.Then the grounded grid fault diagnosis method available at home and abroad are studied and analyzed,lay special stress on the based principle of various diagnosis methods and daborating natural electric field method,resistivity method,charging method,polarization impedance method,and exploring and land radar technology and so on and appraises strong and weak points of the different diagnosis methods.