Due to the coupling between double-circuit lines, the values of the secondary arc current and the recovery voltage on the double-circuit lines are higher than that on the single-circuit line. These will affect the possibility of successful auto-reclosure. In order to ensure the successful single-pole auto-reclosure, the values of the secondary arc current and recovery voltage must be limited to be less than some values. In this paper, the method using the high speed grounding switches (HSGS) to extinction t...