志高小区变压器结构噪声分析与控制

为解决志高小区变压器噪声扰民问题,通过对该小区地下室干式变压器分布的研究,并结合对变压器噪声传播机理的分析,得出由变压器振动引起的结构噪声是扰民的主要原因。采取安装隔振装置等隔振措施,有效地降低了变压器噪声对居民的影响,并通过对居民室及变压器隔振前后的振动加速度进行测量,同一测点振动级降低均在10 d B以上,同一测点的加速度值降低60%以上,基本解决了由变压器结构噪声引起的噪声扰民问题。

Analysis and control of the transformer structure noise in Zhigao residential area

In order to solve the nuisance problem due to transformer noise in Zhigao residential area, the dry-type transformers'' distribution in an underground chamber of Zhigao residential area is investigated and the propagation mechanism of transformer noise is analyzed. As a result, it is concluded that the structural noise caused by transformer vibration is the main reason affecting the residents. By installing vibration isolation device, the effect of transformer noise on the residents is effectively reduced. Through the measurements of vibration accelerations in the residential room before and after the transformer vibration being isolated, the vibration level at the same measurement point is reduced by more than 10dB and the decrease in acceleration value is more than 60%. The nuisance problem caused by transformer structure noise has been solved basically.