Novel method for disturbance identification in power systems

With the development of power grid interconnection, it is necessary for operators to know about system dynamic status while disturbance occurs in power systems in order to take appropriate counter measures to ensure the power system security. The advent of wide area measurement system (WAMS) makes the monitoring of power system dynamic behavior become possible. Based on WAMS, a method for identifying different kinds of disturbance in power system is presented in this paper. Firstly, the features of disturbances (i.e. short circuit, load shedding and loss of generation) that frequently occur in power system are analyzed in detail. Then, based on the idea of pattern recognition, the suggested disturbance identification method is discussed. Finally, computer simulation results are carried out in North China power grid, which demonstrate the validity of theoretical analysis and the feasibility of the proposed disturbances identification method