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Please use this identifier to cite or link to this item: http://hdl.handle.net/2080/778

Title: Wavelet packet-based digital relaying for advanced series compensated line
Authors: Samantaray, S R
Dash, P K
Keywords: fault currents
thyristor applications
wavelet transforms
Issue Date: 2007
Publisher: IEEE
Citation: IET Generation, Transmission & Distribution, Vol 1, P 784-792
Abstract: A new approach for the protection of thyristor-controlled series-compensated (TCSC) line using wavelet packets transform (WPT) is presented. The proposed method uses one cycle post-fault-current samples just after fault inception, which is processed through WPT and decomposed into various decomposition levels. The decomposed components are grouped together to provide different frequency sub-bands. Then the phase selection signal (PSS) and section identification signal (SIS) are computed to identify the faulty phase and faulty section, respectively, involved in the fault process in transmission line including TCSC. A threshold value (THD) is selected for PSS, and PSS above THD describes the faulty phase involved, otherwise not. Similarly, another THD is selected for SIS, and SIS below THD describes fault that includes TCSC, otherwise fault that does not include TCSC. As PSS takes half cycle after fault inception to identify the faulty phase and then triggers SIS, the faulty phases and f...
Description: Copyright for the paper belongs to IEEE
URI: http://dx.doi.org/10.1049/iet-gtd:20070052
http://hdl.handle.net/2080/778
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