Fault Section Addressing Based on Creditability

Considering the impact of power feedback in power system when fault occurs, an approach of fault section diagnosis based on the creditability is proposed. Fault indicators are used to collect the information for establishing the original decision table and reductive decision table. An attribute reduction algorithm based on distinct matrix and logical operation is used to reduce the original decision table. The task that defining the most suspected fault section is separated into two parts, one is to find the maximum fault creditability, and the other is to calculate the fault creditability of local section recursively. The fault modes of decision tables and the probabilities of power feedback are formed automatically with the help of the topological relation of graphic components.