Referenced Items are not available for this document.
Digital relays traditionally use phasor estimation techniques based on the digital Fourier transform (DFT) and its variants. In recent literature, it is claimed that discrete wavelet transform (DWT) based filter performs better than traditional filters for phasor estimation. However, these claims are not well supported by sufficiently detailed analysis. This paper presents a detailed analysis to verify the claim. Both synthetic waveforms and fault waveforms simulated with PSCAD/EMTDC are used. Effect of the decaying dc offset on filter performance is studied in detail. Performances of DFT, Cosine, and least-error-square (LES) algorithms are compared with DWT algorithm.
Published in:
Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century, 2008 IEEE
Date of Conference: 20-24 July 2008
- Page(s):
- 1 - 6
- ISSN :
- 1932-5517
- E-ISBN :
- 978-1-4244-1906-7
- Print ISBN:
- 978-1-4244-1905-0
- INSPEC Accession Number:
- 10142108
- Conference Location :
- Pittsburgh, PA
- Digital Object Identifier :
- 10.1109/PES.2008.4596113
- Product Type:
- Conference Publications
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