Because traditional Prony method have difficult to analyze low frequency oscillation signal with noise, a new low frequency oscillation analysis method is proposed ,which integrates neural network adaptive filtering with improved Prony method. Firstly, this method considers the wide area measurement signals as the inputs. Then,the neural network adaptive filter method is used for low fi'equency oscillation signal pre-processing, adjusting the threshold of performance indicators to determine the filtering effect. Finally, the filtered signal is...