Characteristics and suppression of secondary arc on 500 kV transmission lines for single pole reclosure purposes

Single phase to ground faults are the most frequent problem in the extra high voltage overhead lines, and are temporary in most cases. This type of fault can be quickly eliminated using a single pole reclosure, but secondary arc phenomenon often makes the reclosure fail to work. This study aimed to obtain the characteristics of the secondary arc on the 500 kV transmission lines as well as obtain a solution to minimize the amplitude of secondary arc on both transposed and untransposed lines, so that the reclosure can work properly and the system maintains its stability. The effect of high speed grounding speed and neutral reactor attachment at neutral of shunt reactors on minimizing secondary arc and a possibility to activate shunt reactor only during dead time are analyzed in this study.