An N-1 security analysis method of distribution network based on minimum isolation area information matrix

Abstract To solve the problem of fast online analysis distribution network operation safety, an N-1 security method based on minimum isolation area information matrix is proposed. Firstly, model established to describe switch and transformer in all feeders network. Then real-time load used determine total be transferred downstream fault. Secondly, active power margin transfer path described by capacity matrix. Finally, recoverable supply fault analyzed comparing load. This can quickly realize safety identify areas weak links that do not meet N-1. It needs on-site, calculation analysis.