Research on Measures to Reduce the Lightning Breakdown of 10kV Distribution Lines

The difference between lightning protection and distribution line is analyzed in the paper, which shows that induction lightning protection is the main cause of distribution line. The influence of the heat generated by lightning current and power frequency current on the distribution line is calculated. The results show that the lightning current does not cause the wire breaking, and the continuous power frequency current is the cause of the power distribution line breaking. The simulation model of overhead transmission line in distribution network is established and the induced lightning overvoltage on the line is calculated by simulation. Considering the working conditions of different grounding resistances, the paper calculates and compares the limiting effect of lightning arrester and ground wire on the overvoltage of the circuit. The results show that the lightning arrester has better lightning limiting effect than the two other lightning protection measures. however, the ground resistance needs to be kept low to ensure the lightning arrester is effective.