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Open AccessArticle

Recognition of Traveling Surges in HVDC with Wavelet Entropy

School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
Author to whom correspondence should be addressed.
Academic Editors: Jose C. Principe, Badong Chen and Kevin H. Knuth
Entropy 2017, 19(5), 184;
Received: 4 February 2017 / Revised: 5 April 2017 / Accepted: 21 April 2017 / Published: 26 April 2017
(This article belongs to the Special Issue Entropy in Signal Analysis)
Traveling surges are commonly adopted in protection devices of high-voltage direct current (HVDC) transmission systems. Lightning strikes also can produce large-amplitude traveling surges which lead to the malfunction of relays. To ensure the reliable operation of protection devices, recognition of traveling surges must be considered. Wavelet entropy, which can reveal time-frequency distribution features, is a potential tool for traveling surge recognition. In this paper, the effectiveness of wavelet entropy in characterizing traveling surges is demonstrated by comparing its representations of different kinds of surges and discussing its stability with the effects of propagation distance and fault resistance. A wavelet entropy-based recognition method is proposed and tested by simulated traveling surges. The results show wavelet entropy can discriminate fault traveling surges with a good recognition rate. View Full-Text
Keywords: wavelet entropy; traveling surges; HVDC; fault recognition wavelet entropy; traveling surges; HVDC; fault recognition
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Luo, G.; Lin, Q.; Zhou, L.; He, J. Recognition of Traveling Surges in HVDC with Wavelet Entropy. Entropy 2017, 19, 184.

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