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Application of the Super-Resolution Spectral Estimation Theory to the Harmonics and Interharmonics Analysis in the Electric Power System

LI Jing 1,2*,PEI Liang2,YU Dao-yin1,CAO Mao-yong 1,2 1.Key Lab of Opto-Electronics Information and Technical Science Ministry of Education,School of Precision Instrument and Opto-Electronics Engineering,Tianjin University,Tianjin 300072,China;2.Qingdao Campus,Shandong University of Science and Technology,Qingdao Shandong 266510,China;3.Institute of Ocean Instrument,Shandong Academy of Sciences Qingdao,Shandong 266001,China  
The subspace-method-based super-resolution spectral estimation theory is introduced to harmonics and inter-harmonics analysis in the electric power system.The subspace-based MUSIC algorithm is introduced.For subspace method,synchronous sampling is not necessary,spectrum leakage doesn't exist and the resolution is infinite in theory,so it's advantageous to be used in harmonics and inter-harmonics analysis in the electric power system.In the simulation,precise harmonics and inter-harmonics analysis results were obtained,showing its superiority to the classic Fourier method.
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