电力变压器噪声测量时测量面积的研究

Study on the area of the measurement surface for measuring transformer noise

电力变压器是换流站的主要噪声源之一,它对社会环境产生的噪声危害已经逐渐不可忽视。研究变压器噪声测量面积对准确获得变压器声功率级意义重大,因为声功率级影响到变压器噪声评价和后期的噪声治理。通过实验研究了变压器顶部和四周辐射的情况,结果表明:变压器顶部辐射的声功率级有时比四周还大,不可忽略。针对计算声功率级时,测量表面面积是否包括包络变压器顶部的表面面积进行误差分析,最终得出结论:不包括顶部面积时,声功率级的计算值相对于实际值偏小。

The 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.