采用异频法测量淇澳桥大型地网接地阻抗的实践

Practice of measuring large scale grid ground impedance of Qiao Bridge by using Different-frequency Method

为了避免高频干扰、带电运作的线路、测量回路的互感、地中零序电流及地下导体对测量大型地网防雷接地装置阻抗的影响,应用异频法对淇澳大桥接地阻抗进行测试,取得显著效果。

In order to avoid the influence of high frequency interference, charged line, measurement circuit mutual inductance, ground zero sequence current, and underground conductor on measuring the impedance of lightning protection grounding device of large ground network, the ground impedance of Qiao Bridge was tested by the Different-frequency Method.