Fault diagnosis at substations based on sequential event recorders

Work specifically related to fault diagnosis at the substation level using recorded sequential signals from various protective and control devices is presented. The techniques used for substation diagnosis and the methodological aspects such as knowledge representation, implementation, and the like are described. Comparisons are made with relevant diagnostic systems at the centralized, supervisory level. The advantages and disadvantages of a decentralized diagnosis method and the lessons learned from the SEPT project are discussed