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A Fault Location Algorithm Using Wavelet Transformation for HVDC Cables  

Kwon, Young-Jin (명지대 공대 전기공학과)
Kang, Sang-Hee (명지대 공대 전기공학과)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.57, no.8, 2008 , pp. 1311-1317 More about this Journal
Abstract
In this paper, a fault location algorithm using wavelet transform is proposed for HVDC cable lines. The arriving instants of the first and second fault-induced backward travelling waves can be detected by using wavelet transform. The fault distance is estimated by using the time difference between the two instants of backward travelling waves and the velocity of the travelling wave. To distinguish between the backward wave from fault point and the backward wave from the remote end, polarities of backward waves are used. The proposed algorithm is verified varying with fault distances and fault resistances in underground cables of VSC(voltage source converter) HVDC system and CSC(Current Source Converter) HVDC respectively. Performance evaluations of the proposed algorithm shows that it has good ability for a fault location of HVDC cable faults.
Keywords
HVDC; Fault location; Underground cable; Travelling wave; Wavelet transform;
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