Fault diagnosis based on equivalent input disturbance for power system

The existing power system fault analysis method is based on the information of power system relay protection and sensor device to determine the location and type of fault. With the continuous expansion of the power system and the increasing complexity of the structure, excessive alarm information makes it difficult to diagnose the power system faults timely and effectively. A fault diagnosis method for power system based on equivalent input disturbance is proposed in this paper. It just uses the electrical quantities on power system, then builds the hierarchical fault diagnosis model. The fault is regarded as a disturbance which could be determined by analyzing disturbance characteristics. Finally, the feasibility of this method could be identified through the simulation results of the IEEE 33 nodes model.