Analysis and Design of Pulse Reclosing Vacuum Switch Based on Permanent Magnet Electromagnetic Repulsion Mechanism

Reclosing is an effective method to distinguish instantaneous faults from permanent faults, but there will be an enormous shock for power system when reclosing in case of a permanent fault. The pulse reclosing technology can avoid the adverse effects even if reclosing during a permanent fault. Therefore, the pulse reclosing vacuum switch (PRVS) acts as the key equipment to ensure the reliable pulse reclosing. In this paper, the working process of the PRVS is analyzed, and an improved PRVS based on permanent magnet electromagnetic repulsion mechanism (PMERM) is designed. To analyze the dynamic characteristics of the PRVS, the multi-physical domain co-simulation numerical model is developed using the ANSYS Maxwell and ANSYS Simplorer. Finally, a prototype of PRVS is designed and manufactured, and its mechanical and electrical characteristics are tested. The simulation and test results show that the designed PRVS can meet the technical requirements of pulse reclosing satisfactorily.