Intelligent alarm processing and fault diagnosis in digital substations

For the present situation of the traditional substation has many drawbacks, a system of intelligent alarm and fault diagnosis for transmission and transformation equipments in the digital substation is proposed in this work based on the multi-agents structure. According to the architecture of the digital substation, the characteristic of information flow and data flow, the accident handling process, the layered feature of the fault information and so on, two main function modules, i.e., the intelligent alarm module and the transmission and transformation equipments fault diagnosis module, are designed for satisfying the function need of analyzing the substation fault hierarchically. Then the agents of the intelligent alarm and fault diagnosis, and the coordination mechanism between them are discussed in detail. Finally, the theoretical analysis and a fault scenario are served for demonstrating the feasibility and validity of the method presented.