Analysis of the Conduction Process for Active Surge Protection Gap With Combination Wave Energy Injection

In this paper, we designed an active coupling trigger circuit and an active surge protection gap (ASPG). The surge protection level of the passive SPG is improved, and the operating time of the passive SPG is shortened. The equivalent circuits for the coupling trigger circuit were developed. Then, we analyzed the component transient voltage of the active coupling trigger circuit with the combination wave injected. We obtained the numerical relationship between the coupling trigger current and the current flowing through the ASPG. In addition, the timing relationship between the component voltage and the current was acquired. To verify the analysis results, we established the combination wave generator and conducted an experiment. In the experiment, we observed that the trigger circuit operating time and the ASPG impulse breakdown voltage changed with the capacitor charging voltage of the combination wave generator. Furthermore, we discovered the change laws. The results also show that the operating time and impulse breakdown voltage of the ASPG are both smaller than the passive SPG. These results provide an important theoretical and experimental basis for the further study and structural optimization of the ASPG.