Research on Highly Selective In-situ Fast Protection for Distribution Network

In order to improve the selectivity and quick action of the distribution network protection, this paper proposes different in-situ fast protection configuration schemes according to different structures of the distribution network. By shortening the action time limit set according to the ladder principle, it is possible to realize multi-level fast protection. The actual engineering proves that the fast protection configuration scheme proposed in this article can effectively shorten the power outage range of phase-to-phase short-circuit faults. Improve the selectivity and quickness of distribution network protection, which has wide applicability and high promotion and application value.