Research on Compact Design of Multi-chamber Arc-extinguishing Structure for Lightning Protection

Multi-chamber arc-extinguishing structure is the latest effective measure to extinguish power frequency follow current arc caused by lightning flashover. However, the higher the voltage level, the more chambers are needed, and the size of multi-chamber structure is too large, which is not conducive to line installation. In order to solve the problem existing in the use of multi-chamber structure, a spiral series compact design of multi-chamber arc-extinguishing structure is proposed in this paper. Impact current test platform is built and the arc path distribution and arc-extinguishing performance of compact multi-chamber arc-extinguishing structure are analyzed. The impact arc of the compact multi-chamber arc-extinguishing structure is effectively confined in the chamber, which verifies the effectiveness of the compact design of the multi-chamber structure. And the number of chambers in the unit insulation height can be effectively increased by using compact design method.