Study on the Influence of Wildfire on Streamer Discharge in Transmission Line Gap

In order to explore the influence of wildfire on the streamer discharge of transmission line gap, combined with the characteristics of the high temperature environment and the change of air gas composition ratio caused by wildfire, based on the theory of plasma hydrodynamics, this paper establishes a streamer discharge model with a rod-plane gap of 5 mm under wildfire conditions, and conducts two-dimensional numerical simulation of the streamer discharge process. Air is regarded as a mixture of N2, O2 and CO2, and different CO2 concentrations and temperature are set to simulate the transmission line environment under wildfire conditions. The simulation results show that under standard atmospheric pressure, the development rate of streamer increases with the increase of temperature and the increase of CO2 concentration. Compared with the influence of the two on the gap streamer discharge, temperature plays a decisive role.