Substation environment noise removal method and system based on CEEMDAN and wavelet threshold

The invention discloses a transformer substation environment noise removal method and system based on CEEMDAN and a wavelet threshold, and the method comprises the steps: obtaining a pure voiceprint signal during the no-load operation of a transformer and a pure environment noise signal, and adding the environment noise signal to the voiceprint signal to obtain a noisy voiceprint signal; the pure voiceprint signals and the voiceprint signals with noise are decomposed through CEEMDAN, and a plurality of intrinsic mode functions are obtained respectively; calculating the kurtosis of the intrinsic mode function; extracting an intrinsic mode function of which the kurtosis deviation is greater than or equal to a set value after the voiceprint signal with noise is decomposed, and carrying out noise reduction on the intrinsic mode function by adopting a wavelet threshold method; and reconstructing the voiceprint signal by using the intrinsic mode function after noise reduction and the intrinsic mode function of whic