A Fast Method of Local Network Topology

Only few switches in a real-time power system are operated during a short interval between the executions of the network topology algorithm, and switch activities just have local affect on network topology. So a fast local network topology method using optimal search direction is presented in this paper. The proposed method has three main procedures: determining optimal search direction, substation configuration and network configuration. Firstly the proposed method determines generalized overhanging branches and finds the optimal search directions for them. Then the substation configuration reconfigures buses only at substation voltage levels affected by switch activities. At last the network configuration determines network connectivity for islands in optimal search direction which can greatly decrease search scope. The presented method is fast, effective and reliable, and experimental results illustrate the effectiveness of the method.