Study of secondary arc extinction in UHV series capacitor compensation transmission line

Successful single phase reclosing is closely related with the quick self extinction of the secondary arc. In order to accelerating extinguish the arc, a method of using a certain resistor to short circuit the fault phase capacitor is proposed when a single-phase ground fault occurred in UHV series capacitor compensation transmission line. The frequency characteristics of secondary arc current were discussed in detail, and the relationship between the value and its attenuation rate of DC component of the secondary arc and the fault time, arc resistance were given in this paper. The results show that this method is feasible and effective to extinguish secondary arc.