基于近场声全息的电力变压器声场重建  

Reconstruction of Power Transformer Sound Field Based on Near-field Acoustical Holography

作　　者：杨鹏[1,2] 应黎明[1] 王晋伟[1] 王国栋[1] 刘亚男[1] 

机构地区：[1]武汉大学电气工程学院,湖北武汉430072 [2]国网湖南省电力公司株洲供电公司,湖南株洲412000

出　　处：《陕西电力》2017年第6期7-10,29,共5页Shanxi Electric Power

基　　金：国家自然科学基金资助项目(51377123)

摘　　要：为提高电力变压器声场重建精度,充分发挥有源降噪系统性能,将变压器周围声场等效为4个面声源噪声的叠加,并建立其半自由声场模型,运用基于等效源法的近场声全息技术重建电力变压器周围声场。分别对不考虑地面折射和考虑地面折射的重建模型进行模拟试验,通过重建面上2种情况预测值与实测值的对比,得出考虑地面折射的重建模型更准确有效的结论,应用本文所提方法能够准确预测电力变压器周围声场。In order to improve the reconstruction precision of power transformer sound field and the optimization of system performance on active noise control （ANC）, the noise will be transformed into stacking of four noise source surfaces, and the half-free sound field reconstruction model is built. The reconstruction of sound field around power transformer is based on the equivalent source method （ESM） of near-field acoustical holography （NAH）. The experiments will be simulated by reconstructing the model separately by considering ground surface refraction and not. Through the comparison between predictive value and actual value according to the two methods above, it is proved that reconstructing model by considering ground refraction is of more accuracy and effectiveness and the proposed method can accurately predict the sound field around the power transformer.

关 键 词：电力变压器 有源降噪系统 半自由声场 等效源法 近场声全息 

分 类 号：TM403.9[电气工程—电器]