The invention discloses a method for optimizing parameters of a secondary sound source in active
noise reduction of a power
transformer. The method comprises the following steps of
numbering positions; initializing an amplitude and a
phase angle; primarily selecting the amplitude and the
phase angle by utilizing a
genetic algorithm; substituting the primarily selected amplitude, the
phase angle, the number and the positions; performing feasibility judgment; and continuing fine-tuning and optimizing the amplitude and the phase angle of the secondary sound source and the like. The optimization of the parameters of the secondary sound source is a core issue researched by an active
noise reduction technology of the power
transformer. On the basis of analyzing an active
noise reduction physical mechanism, a noise
radiation model of the power
transformer is established. Considering actual
engineering needs, the parameters of the secondary sound source are divided into two categories, and the parameters of the secondary source are optimized from three aspects, namely the number, the position and the
source strength. In view of the interaction among the parameters such as the positions and the
source strength, fixed parameters and flexible parameters are alternately preferred to form a
genetic algorithm-based gradual search approaching strategy, so that a good overall active
noise reduction effect can be achieved.