1.Northeast Petroleum University;2.Engineering technology Research institute of XinJiang oilfield company
The fault location in power grid that ignores alarm timing information always has the problems of low positioning accuracy and appears several solutions。The fault location method by Single information source is inaccuracy，and the fault tolerance is low. Therefore， a new fault location method is proposed. With the alarm timing information，the alarm timing matrix and timing objective function for fault location are formed firstly. The timing objective function is formed by immune genetic algorithm. Then, with the SACDA system, fault recorder information system, relaying protection system and WAMS system, the distribute functions to the probability of the fault state are formed by time series matrix method, protection value method, protection path method, recorder method and WAMS method. Finally, the multi-source information is formed by improved D-S theory based on fuzzy analytical hierarchy process (FAHP). The discount evidence method based on fuzzy analytical hierarchy process is used to solve the problem of importance weights that can’t be determined quantitatively by theory. Possibility C mean clustering algorithm is used to locate the fault devices and non-fault devices. The results from the simulation system indicate that this method can locate the faults efficiently, accuracy.