Design and implementation of a fault diagnosis system for transmission and subtransmission networks

This paper proposes a new intelligent diagnostic system for on-line fault diagnosis of power systems using information of relays and circuit breakers. This diagnostic system consists of three parts: an interfacing hardware, a navigation software and an intelligent core. The interfacing hardware samples the protective elements of the power system. By means of this data, the intelligent core detects occurrence of fault and determines the fault features, such as type and location of fault. The navigation software manages the diagnostic system. The software controls the interfacing hardware and provides required data of the intelligent core. Moreover, this software is user interface of the fault diagnostic system. The proposed approach has been examined on a practical power system (Semnan Regional Electric Company) with real and simulated events. Obtained results confirm the validity of the developed approach.