Research on the Method to Measuring Tower Grounding Resistance by Distributing Multi Electrodes around Local Area

Abstract

The traditional methods of measuring grounding resistance need larger current lead length and long electrodes distribution distance, which brings difficulties to the measurement of tower grounding resistance in mountainous area and dense urban area. The long electrode distribution distance also consumes more manpower and material resources, and increases the economic cost of grounding resistance measurement. In order to reduce the workload of the staff, a new method of measuring tower grounding resistance is needed, which can measure the tower grounding resistance in real-time and short distance. Based on the distribution characteristics of discharge current inside and outside the tower foundation, a new method for measuring tower grounding resistance in local area of the tower foundation is proposed in this paper. This method reflects the actual discharge current to the greatest extent during the measurement process, thus reducing the influence of current distortion in the measurement and improving the accuracy of tower grounding resistance measurement under the condition of distributing electrodes in short distance.