In order to improve noise immunity of power system low frequency oscillation dominant pattern recognition,a new algorithm based on FFT and neural network is proposed in this paper.Firstly,the frequency and energy weight of the dominant mode can be calculated by using the windowed and interpolated FFT algorithm.Secondly,the neural network method is used to analyze low-frequency oscillation signal,and the damping factor can be calculated based on the variation of amplitude.Finally,the amplitude and phase of l...