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《Journal of Electronic Measurement and Instrument》 2008-04
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Research on Power Measurement Algorithm Based on Optimum Wavelet Packet Transform

Wang Xuewei1 Tian Tian1 Wang Lin2(1.College of Information Science and Technology;2.College of Mechanical and Electrical Engineering;Beijing University of Chemical Technology,Beijing 100029,China)  
The principle of orthogonal wavelet packet transform and selection of optimum wavelet packet basis were deeply analyzed,and then a novel sub-band RMS and active power measurement algorithm based on optimum wavelet packet transform was proposed,which can be used to divide the band into sub-bands adaptively and to measure active powers of fundamental and harmonics.The computer simulation experiment using db40 wavelets shows that the proposed algorithm is feasible,and the measurement relative error of RMS voltage,RMS current and active power is less than 6×10-5 on the whole band,the measurement fiducial error of active power is less than 8.3×10-5 on the sub-band.
【CateGory Index】: TM933.3
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