Through on-site noise monitoring and investigation

this paper uses SoundPLAN software to model a semi-indoor substation entity

predicts its horizontal and vertical noise distribution

points out the shortcomings of the layout of semi-indoor substation in noise protection

and obtains the influence range of the main transformer on the vertical noise of surrounding high-rise buildings. The ventilation and heat dissipation of the main transformer when it is transformed into a household layout are also analyzed.It is necessary to increase the number of fans

add additional noise sources and muffle the noise of fans. It is proposed that when the main transformer is arranged in the open air

the number of air intake fans can be reduced

the operation mode of the fan can be further optimized and the noise effect of the fan can be reduced. The noise diffusion law of main transformer inlet louvers of various sizes is analyzed. It is pointed out that the smaller the size of the main transformer inlet

the better. It can provide reference for the improvement of substation layout and noise control.