Type of Document Dissertation Author Tang, Jie Author's Email Address firstname.lastname@example.org URN etd-05272006-232145 Title Wide Area Differential Protection System Degree Doctor of Philosophy Department Mechanical Engineering, Department of Advisory Committee
Advisor Name Title Peter G. McLaren Committee Chair Dave Cartes Committee Co-Chair Chiang Shih Committee Member Jie Chang Committee Member Jim Zheng Committee Member Juan Ordonez Committee Member Keywords
- Power System Protection
- Wide Area Protection
- Differential Protection
Date of Defense 2006-03-24 Availability unrestricted AbstractThis dissertation is concerned with the development of a new protection philosophy and methodology applicable to ship characteristic power systems (ac part) for fault detection and isolation. A wide area differential protection system and a fuzzy based differential alarm system are the applications of the theories developed in this dissertation.
In the introduction part, the dissertation studies the conventional protection techniques and analyzes a ‘short-cable’ problem associated with protecting a power system on board a ship. The differential method has been identified to have the most potential application in the ship area. The historical development of differential protection methods and differential protective relays are considered in the next chapter.
Subsequent chapters develop new differential theories oriented to the ship protection application: symmetrical component based differential fault characteristics analysis for an ungrounded ship power system, fuzzy differential fault factor, and differential ring fault detection/location principle; and investigate the most desirable fault detection and protection systems: a Fuzzy Based Differential Alarm System (FBDA) and a wide area differential protection (WADP) system.
The experimental section deals with the development and testing of the WADP system for time critical events. The simulation section deals with the development and testing of the FBDA system for not critical time events.
Finally, the issues on ship power system protection and an overall differential type protection system are discussed.
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