摘要
为准确预测变压器远场噪声以及分析路径贡献量,提出基于传递路径分析方法的远场噪声预测和路径贡献量求解方法。将两台并列放置变压器的辐射表面等效为若干个虚拟声源,建立“源-路径-接收者”模型,测量声源点至近场传声器处的频率响应函数矩阵和近场声压向量,采用多通道最小二乘法提取虚拟声源信号,然后基于传递路径分析方法计算远场6个点的声压频谱以及虚拟声源贡献量。与实验结果对比,初始时刻预测误差均小于2 dB,后续随时间变化预测误差均小于3.5 dB。通过评估路径贡献量,找出两台变压器对特定区域路径贡献量最大的辐射面。提出的远场噪声预测和路径贡献量求解方法可获得较准确的变压器远场噪声预测值,可进一步用于对居民投诉区域进行准确实时的噪声预测及为后续采取针对性噪声防治措施提供数据依据。
In order to accurately predict the transformer far-field noise and evaluate the path contribution,a far-field noise prediction and path contribution solving method based on the transfer path analysis is proposed.The radiating surfaces of the two side-by-side transformers are equated to several virtual sound sources,and a“source-path-receiver”model is established.The virtual sound source signals are extracted by multi-channel least squares using the frequency response function matrix and the sound pressure vector measured at the near-field microphones.The sound pressure spectra of six points in the far field and the virtual source contributions are then calculated using the transmission path analysis method.Compared to the experimental results,the prediction errors are less than 2 dB at the initial moment,and the subsequent prediction errors over time are less than 3.5 dB.By evaluating the path contribution,the radiating surfaces with the highest noise contribution of the two transformers to a given zone are identified.The far-field noise prediction and path contribution evaluation method proposed in this paper can provide accurate far-field noise prediction for transformers,which can be further used for accurate real-time noise prediction in the complained neighborhood,as well as providing a data base for subsequent noise prevention treatments.
作者
刘联鋆
李金程
王玉兴
饶庆
李豪
陈俊文
LIU Lianyun;LI Jincheng;WANG Yuxing;RAO Qing;LI Hao;CHEN Junwen(College of Mechanical and Vehicle Engineering,Chongqing University,Shapingba District,Chongqing 400044,China;College of Biomedical Engineering and Instrumentation Science,Zhejiang University,Hangzhou 310058,Zhejiang Province,China;State Grid Hubei Electric Power Company,Wuhan 430070,Hubei Province,China;Wuhan NARI Limited Liability Company of State Grid Electric Power Research Institute,Wuhan 430073,Hubei Province,China)
出处
《中国电机工程学报》
北大核心
2025年第15期6153-6162,I0033,共11页
PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING
关键词
变压器噪声
传递路径分析
路径贡献量
虚拟声源
多通道最小二乘法
transformer noise
transfer path analysis
path contribution
virtual source
multichannel least-mean-square method
