高压架空避雷线对接地网接地阻抗测量结果的影响研究

Influence of HV Overhead Lightning Conductor on Measurement Results of Grounding Impedance for Grounding Network

与接地网相连的高压架空避雷线对接地网接地阻抗的测量结果有较大影响,且解开避雷线后的接地阻抗测量结果均比解开前的大。文章介绍了直线0.618法和四极法2种测量方法及其接线原理,并具体介绍了百丈净水力发电厂一、二级站之间110 kV T型接线的架空避雷线对一、二级站接地网接地阻抗测量的影响情况。

There is greater influence of HV overhead lightning conductor on measurement results of grounding impedance for grounding network. The measurement results of grounding impedance are larger in opening the HV overhead lightning conductor than that before the opening. Two measurement methods and their wiring principles, line 0.618 and 4 poles, were introduced. The influence condition of 110 kV overhead lightning conductor with T type connection on measurement results of grounding impedance for grounding network in Baizhangji Hydropower plant were also introduced.