半户内变电站噪声控制措施探讨

Discussion on Noise Control Measures of Semi-indoor Substation

通过现场噪声监测调查,利用SoundPLAN软件对某半户内变电站进行实体建模,预测其水平向和垂直向的噪声分布,指出了半户内变电站布置方式在噪声防护方面存在的不足,得出了主变对周围高层建筑垂直向的噪声影响范围。对主变改造为全户内布置时的通风散热进行了分析,需额外增加风机数量,额外增加了噪声源,并需对风机进行消声处理。提出了主变采用露天布置时,可减少进风风机数量,并可进一步优化风机运行方式,降低风机噪声影响。对各种尺寸的主变进风百叶窗噪声扩散规律进行了分析,指出在满足主变散热条件下,应控制进风口尺寸越小越好。为变电站平面布局的改善及噪声治理提供参考。

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.