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Transmission Line Fault Location Algorithm Using Estimated Local Source Impedance  

Kwon, Young-Jin (명지대 공대 전기공학과)
Kim, Su-Hwan (명지대 공대 전기공학과)
Kang, Sang-Hee (명지대 공대 전기공학과)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.58, no.5, 2009 , pp. 885-890 More about this Journal
Abstract
A fault location algorithm using estimated local source impedance after a fault is proposed in this paper. The method uses after fault data only at the local end. It uses the negative sequence current distribution factor for more accurate estimation. The proposed algorithm can keep up with the variation of the local source impedance. Therefore, the proposed algorithm especially is valid for a transmission line interconnected to a wind farm that the equivalent source impedance changes continuously. The performance of the proposed algorithm was verified under various fault conditions using the Simpowersystem of MATLAB Simulink. The proposed algorithm is largely insensitive to the variation in fault distance and fault resistance. The test results show a very high accurate performance.
Keywords
Fault Location; Current Distribution Factor; Source Impedance Estimation;
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