A new method for fault section estimation in distribution network

Determination of fault section is a necessary step for locating the fault in the distribution power system. In this paper a new practical based method is presented for fault section estimation in distribution system. In the proposed method, at first different zones is defined using impedance classifier. Then, the suitable locations for installing the cutout fuses are determined using expert of designer. After that, special settings for cutout fuse links are determined in such a way that they operate coordinately. Finally, current waveforms are used to distinguish which cutout fuse operated or in which section fault occurred.