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

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contributor.authorSamantaray, S R-
contributor.authorDash, P K-
date.accessioned2009-02-28T05:21:58Z-
date.available2009-02-28T05:21:58Z-
date.issued2007-
identifier.citationIET Generation, Transmission & Distribution, Vol 1, P 784-792en
identifier.urihttp://dx.doi.org/10.1049/iet-gtd:20070052-
identifier.urihttp://hdl.handle.net/2080/778-
descriptionCopyright for the paper belongs to IEEEen
description.abstractA 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 faulty sections are identified within one cycle of fault inception. The proposed WPT algorithm is also tested on physical transmission line model with TCSC, under wide variations in operating conditions and provides accurate results. Thus, the proposed method provides accurate and fast protection measures for TCSC-based line.en
format.extent655206 bytes-
format.mimetypeapplication/pdf-
language.isoen-
publisherIEEEen
subjectfault currentsen
subjectthyristor applicationsen
subjectwavelet transformsen
titleWavelet packet-based digital relaying for advanced series compensated lineen
typeArticleen
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