电力变压器噪声测量时测量面积的研究

he power transformer is one of main noise sources in converter station,so the influences to social environment have been gradually paid great attention. It is very significant for sound power level of transformer to study on the area of the measurement surface for measuring transformer noise,because sound power level of transformer affects the noise evaluation and subsequent controlling. The radiation from the top and around the transformer was studied through the experiment.The results of the experiment showed that sound power level of the top of the transformer is more than the surrounding sometimes.Thus, the radiation from the top should not be ignored.According to error analysis between sound power level calculated including top surface area and excluding top surface area .Finally,The result showed that the value calculated of the sound power level is smaller than the actual value.