振速法在换流变压器声功率测量中的应用研究  

Application Research on Vibration Velocity Method in the Converter Transformer Sound Power Measurement

作　　者：阮学云[1,2] 李志远[1] 宋健[1] 

机构地区：[1]合肥工业大学噪声与振动工程研究所,合肥230009 [2]安徽理工大学机械学院,安徽淮南232001

出　　处：《高压电器》2015年第4期24-28,共5页High Voltage Apparatus

基　　金："十一五"国家科技支撑计划重点项目(2006BAA02A21)~~

摘　　要：换流变压器作为高压直流换流站中最主要的噪声源之一,其声功率级测量的精确与否影响着站区的噪声评价和后续的噪声控制。文中首先通过研究实验室中变压器空载下的振动与噪声的关系,得到变压器的声辐射指数曲线;再根据其声辐射指数曲线,通过现场测量同一型号换流变压器各个面振速,计算出换流变压器在负载下的声功率级。结果表明,与声强测量法相比,振速法测量换流变声功率级的误差在2 d B以内,说明振速法在现场换流变压器噪声测量中应用是可行的,在当前现场测试背景下,与其他方法测量声功率相比,该方法具有一定的应用前景。The converter transformer is one of the main noise sources in converter station and substation,the sound power measurement accuracy of the transformer affects noise evaluation and noise control. By studying the relationship between the structure surface vibration and noise of the converter transformer under no-load condition, this paper obtains the converter transformer acoustic radiation exponential curve according to the noise radiation exponent curve. Then through the field measurement of the surface vibration velocity of the same type converter transformer, the sound power level of the converter transformer can be calculated under the load. Compared with the method of sound intensity measurement,the results show that the vibration velocity measurement error of the converter transformer sound power level within 2 d B, which proves vibration velocity method applied in the field of converter transformer noise measurement is feasible. Compared with other methods sound power measurement, the method has a certain application prospect under the background of the current field test.

关 键 词：换流变压器 声功率 声辐射指数曲线 振速法 声强法 现场测量 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM41