Title :
A fast GST with frequency correction for estimation and tracking of harmonic and inter-harmonic frequencies in power signals
Author :
Biswal, M.K. ; Dash, P.K., Sr. ; Biswal, B.
Author_Institution :
Silicon Inst. of Technol., Bhubaneswar, India
Abstract :
An alternate method based on Generalised S-transform (GST) is proposed for identification of harmonic, Inter-harmonic and sub-harmonic frequency in power signals. A selective frequency partitioning with reciprocal signal cropping is introduced to significantly reduce the computational demand of the GST algorithm. The proposed selective frequency partitioning is chosen such that the bins at dominant frequencies are taken into account. Further, a Jacobian estimator with bias correction is used for the frequency correction. Thus, the proposed method reduces the error caused by the leakage affect in the GST and accurately estimates the harmonic and inter-harmonic frequencies.
Keywords :
Jacobian matrices; Laplace transforms; frequency estimation; power system harmonics; GST; Jacobian estimator; bias correction; frequency correction; frequency partitioning; generalised S transform; harmonic identification; interharmonic frequency estimation; power signals; reciprocal signal cropping; sub-harmonic frequency; Frequency estimation; Harmonic analysis; Power system harmonics; Signal resolution; Time frequency analysis; Transforms; Frequency Estimation; Harmonics; Interharmonics; Power Quality; S-Transform;
Conference_Titel :
Energy, Automation, and Signal (ICEAS), 2011 International Conference on
Conference_Location :
Bhubaneswar, Odisha
Print_ISBN :
978-1-4673-0137-4
DOI :
10.1109/ICEAS.2011.6147194