Dependability analysis of generator phase fault protection system using fault tree method

Generator protective systems are sometimes very complex incorporating many different equipment groups. The inherent dependability parameters such as reliability, availability, maintainability and security of such complex systems are a concern of the protection engineer and present a significant analytical problem. This paper describes the use of fault tree analysis as a method for analyzing the dependability parameters of generator stator phase fault protection system and shows the advantages of a backup protection system.