1. Accurate Fault Location Using Detailed Transmission Line Models NSF/EPRI Workshop M. Kezunovic Texas A&M University March 29, 2002

2. ACCURATE FAULT LOCATION ACCURACY OF 1% NOT AFFECTED BY Rf NO IMPACT OF MUTUAL COUPLING WORKS WITH HIGH SPEED AUTOREC. TRANSPARENT TO FAULT TYPE WORKS FOR TRANSP. AND UNTRANSP. TRANSMISSION LINES BASED ON ACCURATE EMTP MODEL

3. NEW FAULT ANALYSYS CONCEPT Central File Server System wide analysis COMTRADE Faxing Substation analysis DPR SER DFR GPS Faxing Substation analysis DPR SER DFR GPS Email, Fax, and Pager Notification Intranet Broadcasting WWW Hosting

4. ACCURATE FAULT LOCATION

5. THE BASIC PRINCIPLE

6. “S” AND “R” EQUATIONS

7. EQUATION FOR PHASE “a”

8. FAULT LOCATION EQUATION

9. WAPA TEST SYSTEM

10. FAULT LOCATIONS FAULT TYPES FAULT INCIDENCE ANGLE FAULT IMPEDANCE SERIES CAPACITORS INSTRUMENT TRANSFORMERS

11. TEST RESULTS

13. FACTORS AFFECTING ACCURACY SAMPLING FREQUENCY EMTP MODEL ACCURACY USE OF “SHORT” AND”LONG” TRANSMISSION LINE MODELS TRANSPOSITION POINTS COUPLING WITH THE LINES THAT END AT “OTHER” BUSES SAMPLING SYNCHRONIZATION

14. CONCLUSIONS USING MODEL-BASED TECHNIQUES ACCURATE FAULT LOCATION USING SYNCHRONIZED DATA THE NEED FOR ON-LINE PARAMETER ESTIMATION AND MODEL IDENTIFICATION AN ULTIMATE RELAYING SCHEME, BUT SLIGHTLY DELAYED ACTION DUE TO EXTENSIVE COMMUNICATION NEEDS