Study on The Effect of 10kv Distribution Line Pole Natural Grounding on The Protection Effect Of Arrester

For a long time, due to the insufficient importance of distribution network and the large number of poles, the grounding resistance of poles in distribution lines is often difficult to meet the standard requirements. Because the line arrester releases the lightning current through the pole, the effect of the grounding resistance of pole on the effect of the line arrester is an important concern of lightning protection in the distribution network. In this paper, a lightning strike distribution line model is established through PSCAD, and the influence of grounding resistance on lightning resistance level of non-arrester lines is analyzed through simulation. The effect of different grounding resistance and disposition density of lightning arrester on lightning resistance level is analyzed, and the safety of natural grounding of pole under lightning is verified. This paper illustrates the effectiveness and feasibility of using concrete poles for natural grounding of lightning arrester for distribution network line, and provides a basis for the lightning arrester configuration scheme of distribution overhead line.