Distribution network fault positioning method based on net-based matrix type algorithm

The invention provides a distribution network fault positioning method based on a net-based matrix type algorithm. The method comprise following steps of S1, defining fault indicators in a power distribution network to be nodes, defining sections at non-power supply ends in sections formed by division of the power distribution network by the fault indicators to be edges connecting the nodes, and according to connection conditions of the nodes, constructing a net-based structure matrix D; S2, acquiring indication information of the fault indicators in the power distribution network, and constructing a fault information matrix G of the indication information about the fault indicators; and S3, according to the net-based structure matrix D and the fault information matrix G, judging fault sections, if fault indicators corresponding to two end nodes of one section give out alarms or do not give out alarms, judging the section to be a non-fault section, and if only one of the fault indicators corresponding to two