In Smart Substation digital communication, transmission mechanism in Ethernet mode as the main mode of transmission, there is essential difference with the traditional transmission method to wiring cable based on intelligent substation. Network equipment fault features were extracted accurately, and realize the fault diagnosis and fast positioning, put forward a kind of based on higher order cumulants The intelligent substation network equipment fault location method features that the abnormal information of the intelligent substation network equipment is collected by the wireless sensor , the collected data is subjected to information fusion and filtering processing , fault feature compression and information pairing are carried out by combining the high - order cumulant feature matching method , the fault feature compression and the information pairing are carried out , and the fault diagnosis is completed . The simulation results show that the fault positioning accuracy of the substation network equipment is high and the fault diagnosis efficiency is better.