Analysis method and analysis system of harmonious waves in power systems

The present invention discloses an analysis method and analysis system of harmonious waves in power systems, employing n-th power discrete signals with arithmetic fourier transform analysis sampling numbers which are not 2. Because the arithmetic fourier transform needs a large number of non-uniform sampling points, while a computer terminal acquires uniform sampling points, the sample inconformity problem of the uniform discrete signals is needed to be solved through a zero degree interpolation method; and then on this basis, non-uniform sampling is performed and the signals are analyzed through the arithmetic fourier transform. In order to further shorten the calculating time, an off-line calculation of the arithmetic fourier zero degree interpolating point location is realized according to the invention so as to allow the wave analysis computation speed to be much faster than the FFT algorithm and have good real-time operation. Moreover, the number of operation is much smaller than the traditional FFT algorithm when the sampling number is 80 in each period.