Design of a harmonic detecting and analyzing system for computer power
QU Xiaolei, YING Qunmin
(College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)
Abstract: In order to detect and analyze the harmonic of computer power accurately, a harmonicanalyzing method based on the synchronizingmethod of relocating the samplingsequence was introduced,  a new harmonic detecting and analyzing system was designed. The application field, principle and contracture of the system were investigated. For the sake of improving the efficiency of dataprocessing, the linear synchronizing method of relocating the sampling sequence was applied to reduce leakageerror and the realsequence fast fourier transform was applied to analyze the frequency spectrum of the harmonic. A new detecting and analyzing system was established for experimental study. The experimental results show that this system working stably and reliably and processes data efficiently in practical application, it can  detect and analyze the harmonic of computer power exactly, which provides reference data for harmonic compensation of computer power effectively.
Key words: computer power;harmonic detection and analysis; Fourier transform; synchronizing method of relocating the samplingsequence