Harmonic Analysis Based On Wavelet Theory

With the development of modern economy, electric power play an important partin the social system and the function of social economy. When the electric powersystem is running, the harmonic harm is the main source of power system. Therefore,how to solve the problem of the harmonic wave in the power effectively is the focus ofthe paper. This article mainly discussed that based on wavelet theory of the harmonicwave in the powerThis paper focuses on that how to is applied to the wave theory when we design thewindow function, so that we can put forward some improvement of window function.When we design the window function in this paper, discuss some of the current goodwindow function, and based on this, join the wavelet function, put forward theimprovement of the superior window function, and is applied to the design FIR digitalfilters.This paper focuses on the nonlinear second is to signal de-noising based on how toput forward the theory of wavelet packet de-noising method. Based on wavelet packetgood local analysis ability, contrast Fourier transform is proposed based on waveletpacket theory of nonlinear de-noising method. In the power system transient and steadystate signal is analyzed by using the wavelet packet decomposition reconstructionalgorithm and Fourier algorithm method of relatively than, further explained the theorybased on wavelet packet of advantage.Finally, this paper summarized the research contents, according to the results,points out the problems in the study of in, and according to the research direction in thisfield for their papers have been further discussed...