Transient analysis of the active surge protection gap trigger process with lightning voltage impulse injection

摘要

An active gas surge protection gap (SPG) and its energy coupling trigger circuit were designed in this study. In the lightning voltage impulse test, the active SPG had better protection characteristics than the passive SPG. To investigate the influence of the trigger circuit on the protection characteristics, the transient voltage and current characteristics of each electrical component in the active coupling trigger circuit were discussed. The equivalent model of the active trigger circuit was established, and the correlation between the active SPG protection characteristics and the active trigger circuit parameters was derived. According to the relationship, the theoretical breakdown characteristics of the active SPGs can be obtained by MATLAB. The deviation between simulated results and experimental data was no more than 11%. Based on the simulation, the design principles of the active energy coupling triggering circuit were proposed, laying the foundation for the theoretical research and engineering application of active SPGs.