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A Comparative Study on Fault Detection Algorithm of AC Generator  

Park, Chul-Won (강릉대학교 전기정보통신공학부)
Shin, Kwang-Chul (성균관대학교 정보통신공학부)
Shin, Myong-Chul (성균관대학교 정보통신공학부)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers P / v.57, no.2, 2008 , pp. 102-108 More about this Journal
Abstract
AC generator plays an important role of power system. The large AC generator fault may lead to large impacts or perturbations in power system. And then the protection of a generator has very important role in maintaining stability in a power system. In present, the DFT(discrete Fourier transform) based RDR(ratio differential relay) had been widely applied to a internal fault of a generator stator winding. But DFT has a serious drawback. In the course of transforming a target signal to frequency domain, time information is lost. DWT uses a time-scale region. This paper proposes an advanced fault detection algorithm using DWT(discrete Wavelet transform) to enhance the drawback of conventional DFT based relaying. To evaluate the performance of the proposed relaying, we used the test data which were sampled with 720 [Hz] per cycle and obtained from ATP(alternative transient program) simulation. And we made a comparative study of conventional DFT based RDR and the proposed relaying.
Keywords
ATP; DWT; DFT; Generator Protection; Internal Fault; RDR; Stator Winding;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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