| Related citation: | ZHAO Yong,WANG Xue-wei,WANG Lin,HAN Dong,LU Yi-biao.Research and applications of FDMP algorithm for power quality signal analysis[J].Journal of Harbin Institute Of Technology(New Series),2012,19(1):87-93.DOI:10.11916/j.issn.1005-9113.2012.01.018. |
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| Author Name | Affiliation | | ZHAO Yong | College of Information Science and Technology,Beijing University of Chemical Technology,Beijing 100029,China | | WANG Xue-wei | College of Information Science and Technology,Beijing University of Chemical Technology,Beijing 100029,China | | WANG Lin | College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China | | HAN Dong | Heilongjiang Electric Power Research Institute,Harbin 150030,China | | LU Yi-biao | Heilongjiang Electric Power Research Institute,Harbin 150030,China |
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| Abstract: |
| The accuracy of unsteady-state disturbance analysis of power quality signals is reduced by the steadystate components with high amplitudes and energies. In this paper,a novel frequency-domain matching pursuits (FDMP) algorithm is proposed to estimate the parameters of the steady-state components and separate the unsteady-state disturbances from power quality signals. Firstly,the time-frequency atoms and redundant dictionaries are constructed according to the characteristics of power quality signal spectra. Secondly,the steady-state components and unsteady-state disturbances of power quality signals are decomposed by FDMP into two mutually orthogonal subspaces in Hilbert space. Furthermore,the expressions for parameters calculation of steady-state components have been derived. The experiments show that the relative errors of frequency and amplitude estimations of steady-state components are less than 2 × 10 -4 and 5 × 10 -3 respectively,and phase estimation errors are less than 1. 6° under the existence of both interharmonics and unsteady-state disturbances. The steady-state components and unsteady-state disturbances are separated quickly and accurately. |
| Key words: Power quality unsteady-state disturbance matching pursuits (MP) frequency-domain matching pursuits (FDMP) time-frequency atom |
| DOI：10.11916/j.issn.1005-9113.2012.01.018 |
| Clc Number:TM711 |
| Fund: |
