Transmission line tower grounding resistance measurement is a heavy work for power operation and maintenance personnel.In order to measure the grounding resistance of the tower without unraveling the grounding lead,this paper designs a new type of transmission line tower grounding resistance measurement device,which adopts the double-clamp method to measure the grounding resistance.Firstly,the principle of the new transmission line grounding resistance measurement device is analyzed;secondly,the modular design idea is adopted for the hardware design of the grounding resistance measurement device;then,the software design of the grounding resistance measurement device is carried out,and the workflow of the system is given;finally,the developed measurement device is tested,and the error between the measured value of the developed measurement device and the actual value of precision resistance is within 3%.
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