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000000029 001__ 29
000000029 037__ $$aENY-ARTICLE-2008-022
000000029 041__ $$aeng
000000029 088__ $$aISSN: 1350-2360
000000029 088__ $$aCODEN: IGTDE2
000000029 088__ $$aINSPEC: 7099688
000000029 088__ $$aAZ I07/01/I-073
000000029 100__ $$aLobos, T$$uWroclaw University of Technology, pl.Grunwaldzki 13, 50-337 Wroclaw, Poland
000000029 245__ $$aPower system harmonics estimation using linear least squares method and SVD
000000029 260__ $$c2000-06-25
000000029 300__ $$a6p
000000029 500__ $$aIEE Proc. Gener. Transm. Distrib. 2001 Vol. 148 No. 6 pp. 567-572
000000029 520__ $$aThe paper examines singular value decomposition (SVD) for the estimation of harmonics in signals in the presence of high noise. The proposed approach results in a linear least squares method. The methods developed for locating the frequencies as closely spaced sinusoidal signals are appropriate tools for the investigation of power system signals containing harmonics and interharmonics differing significantly in their multiplicity. The SVD approach is a numerical algorithm to calculate the linear least squares solution. The methods can also be applied for frequency estimation of heavy distorted periodical signals. To investigate the methods several experiments have been performed using simulated signals and the waveforms of a frequency converter current. For comparison, similar experiments have been repeated using the FFT with the same number of samples and sampling period. The comparison has proved the superiority of SVD for signals buried in the noise. However, the SVD computation is much more complex than FFT and requires more extensive mathematical manipulations.
000000029 6531_ $$aSVD
000000029 6531_ $$aharmonics
000000029 6531_ $$apower system
000000029 6531_ $$adistortion
000000029 700__ $$aKozina, T$$uWroclaw University of Technology, pl Grunwaldzki 13, 50-337 Wroclaw, Poland
000000029 700__ $$aKoglin, H J$$uUniversity of the Saarland, Im Stadtwald B13 D-66041, Saarbr├╝cken, Gemany
000000029 8560_ $$fzbigniew.leonowicz@pwr.wroc.pl
000000029 8564_ $$uhttp://zet10.ipee.pwr.wroc.pl/record/29/files/$$zAccess to Fulltext
000000029 909CO $$ooai:zet10.pwr.wroc.pl:29$$pglobal
000000029 980__ $$aARTICLE