Study And Application Of Expert Systems In Relay Protection Setting

The fault calculation is realized with fault analysis theory of power systems. In the paper, simple fault with operation mode transformation is calculated by modifying node input current. Phase-sequence parameter converse technique is used to get general method in calculating complex fault. Those provide a general foundation for relay protection setting.Research of application of Expert System in power system is carried out and the model to set relay protection by Expert System is provided. A new knowledge expression method is given by analyzing, summarizing setting principles of relay protection. It improves the application level of relay protection software.The system is built up with C/S model, which solves the problems involving multiple users and data share.