变电站接地网接地电阻近距离测法与系统开发

Novel Method for Measuring the Grounding Resistance of the Substation Grid with Short Leads and the System Development

提出了变电站接地网接地电阻近距离测量方法 ,并据此方法开发了变电站接地网考虑实际土壤分层情况的接地电阻近距离测量系统。通过计算得到一定电流极位置下电压极的合理位置 ,极大地缩短了电流极和电压极引线的长度。该系统采用异频测量原理 ,电源频率避开工频 ,注入电流小 ,设备轻便 ,测量的危险性小。

In this paper, a novel method is proposed to measure the grounding resistance with short leads, and the measurement system based on this method is developed. The measurement system takes the actual structure of the soil into account, and shortens the length of the leads. The non-power frequency method is introduced into the measurement system, small current is needed in the measurement process. Thus the measurement system is portable, and the measurement process is quite safe. The measurement system has been verified by test.