电力变压器噪声及其传播特性研究

Study on noise and tramsmission characteristics of power transformer

随着城市现代化建设和发展,一些变电站已经或正在建立在人口密集区域。变电站在运行过程中,变压器产生的可听噪声不可避免地会对周围居民和环境产生直接的负面影响。基于变压器噪声产生机理,利用MATLAB仿真对电力变压器噪声进行功率谱估计分析,对变压器噪声传播特性进行研究,得出变压器噪声呈低频特性,随着噪声传播,每单位频率波携带的功率降低,对于提出变压器降噪措施具有一定的指导意义。

With the modernization and development of cities and towns,some substations have been or will be built in densely populated areas.During the operation of the substation,it is inevitable for the transformer to generate audible noise to produce a direct impact on the nearby residents and the surrounding environment.Based on the transformer’s noise generation mechanism,this study uses the MATLAB simulation to conduct estimation analysis onthe noise power spectrum of power transformer,and probes into the transformer noise propagation characteristics.It is concluded that the transformer noise is low in frequency,and wave for each frequency carries power reduction with the noise tramsmission,which is instructive to work out measure for the reduction of transformer noise.