To resolve that, wto-order charging circuit is used to reduce the stretching discharge, and dipulse is used to increase the reliability of the idscharge, which can decrease the failure discharge.

• 为此，采用两级电容充电的引弧方式来减拉弧现象；同时，使用双脉冲触发方法来提高放电的可靠性，减少停弧现象的产生。