A lightning protection method via compressed arc extinguishing was put forward for power transmission lines

and a corresponding compressed arc extinguishing device connected in parallel with an insulator was invented.In order to verify the effectiveness of the arc extinguishing method

the finite element analysis software Ansys Fluent was used to simulate the process of extinguishing arc by a longitudinal air flow.Simulation shows that the high speed air flow with a peak speed of 500 m/s is generated when the device is triggered.The air flow acts on the sudden inflection point of the arc rapidly

and then the dynamic balance of the arc plasma is destroyed and the arc is extinguished rapidly in 0.2 ms.Then

experiments were conducted to verify the simulation results.Experiment results show that the arc quenching device responds quickly at the starting point of the impact arc

and high speed air flow is produced rapidly to extinguish the impact arc and destroy the passage of following power frequency arc.Actual application also proves the arc extinguishing effect of the device.