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《Automation of Electric Power Systems》 2009-11
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Harmonic Power Measurement Based on Multi-CPU and a Phase Difference Correction Algorithm

ZENG Bo,TENG Zhaosheng(Hunan University,Changsha 410082,China)  
When using the fast Fourier transform(FFT) for harmonic analysis and measurement,the measuring accuracy is apt to get affected owing to the spectral leakage The side-lobe characteristics of Rife-Vincent window are studied and a harmonic analysis and harmonic power measurement algorithm based on Rife-Vincent window phase difference correction is proposed.A new-type three-phase harmonic ammeter is designed based on a multi-CPU structure of TDK6513H+ADSP-BF533+M30624FGPFP,which can accurately measure the electrical harmonic power.Experimental metering outcome indicates that the instrument performance based on the proposed algorithm conforms with the requirements mentioned in GB/T 17833—1999 and GB/T 14549—1993,the errors of the fundamental active power measurement are less than 0.2%,and for the harmonic measurement,errors of amplitudes of harmonic voltage and current in each order are less than 1%,3%,respectively,the errors of phase difference are less than 2°.The ammeter is suitable for high precision harmonic power measurement.
【Fund】: 国家自然科学基金资助项目(60872128)~~
【CateGory Index】: TM933.3
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