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Discriminating among inrush current, external short circuit and internal winding fault in power transformer using coefficient of DWT
Author(s)
Klomjit, Jittiphong
Date Issued
January 1, 2012
Type
Book Chapter
Abstract
This paper proposes a technique for discriminating among inrush current, external fault and internal winding fault of three-phase two-winding transformer which variations of coefficients of high frequency component obtained from DWT of differential current are analyzed. The maximum coefficient details of DWT are performed as comparison indicator. Various cases based on Thailand electricity transmission and distribution systems are studied to verify the validity of the proposed algorithm. Results show that the proposed technique has good accuracy in the considered system
Citation
Iaeng Transactions on Electrical Engineering Volume 1 Special Issue of the International Multiconference of Engineers and Computer Scientists 2012, 30-43, 2012