Evaluation of the Arc Characteristics of High-Velocity Flows in Semi-closed Spaces Through Simulation

Conventional lightning protection measures are inadequate because the lightning type is not considered, and the current flow amplitude is uncontrollable. Channel devices cannot completely overcome these drawbacks. Therefore, impact channel-arc suppression-power frequency blocking was proposed in the semi-closed space. In this study, a two-dimensional geometric model was established to develop a high-speed explosive airflow arc-extinguishing device and a self-compression multi-break arc-extinguishing device. COMSOL simulation software was used to investigate the high-speed explosive airflow arc-extinguishing device and arc physical characteristics. The simulation results revealed that the explosive high-speed airflow can quickly extinguish the flash arc and suppress the power frequency arc; the self-compression multi-break device uses the heat of the arc to form a high-speed airflow in the power frequency arc. The combination of the explosive high-speed airflow device and self-compression multi-break device can extinguish the power frequency arc with large current values. The combined device can be applied on overhead transmission lines with high-voltage grades.