Automatic fault locating algorithm based on signal injection method for distribution system
Zhencun Pan · Dianli zidonghua shebei · 2008
An automatic fault locating algorithm based on the signal injection method is proposed,which takes the signal detectors fixed on the feeders as nodes to form the feeder-network describing matrix L and receives the upstream detected information to form the faulty information matrix G.The fault judgment matrix P is calculated by the operation of G and L.According to rough sets theory,the detectors on the faulty feeder are taken as the study domain and condition attribute.Based on the fault judgment matrix P,the fault information table is set,which is then simplified by the discriminable matrix to form the kernel attribute set.The elements of the kernel attribute set correspond to the signal detectors,according to which the faulty section is determined.This algorithm can be applied to feeders with or without branches.A solution to the case of incomplete signal information is given.The effectiveness of this algorithm is demonstrated by its successful applications on site.