用于变电站噪声有源控制的一种算法研究  

Algorithm for substation active noise control

作　　者：赵宏飞[1,2] 马宏忠[1] 陈楷[3] 王春宁[3] 钟钦[1] 

机构地区：[1]河海大学能源与电气学院,江苏南京211100 [2]江苏省电力公司检修分公司扬州分部,江苏扬州225000 [3]江苏省电力公司南京供电公司,江苏南京210008

出　　处：《电工电能新技术》2014年第10期70-75,共6页Advanced Technology of Electrical Engineering and Energy

基　　金：国家电网公司总部2011年重点科技项目(2011-0810-2251)

摘　　要：随着城市中心变电站数量增多以及人们对居住环境要求的提升,噪声扰民以及居民投诉越来越多。首先研究变电站内变压器噪声的特点,发现变电站噪声能量较大的频率分量主要为500Hz以下的低频噪声,且为100Hz整倍数的频率,这些特征频率信号在一段时间内比较稳定,不会发生突变。针对传统变电站噪声无源控制方法的不足,本文结合自适应有源噪声控制技术,提出了一种改进的变步长LMS自适应滤波算法。通过仿真验证了改进算法的性能,并对实测数据进行处理,结果表明算法可以使变电站降噪达到满意的效果。本文重点是变电站噪声和改进变步长LMS自适应滤波算法研究。With the increase of city center substations and enhancement of people＇s living environment requirements,noise nuisance and complaints from residents are becoming more severe. To address this issue,first of all,we studied the substation noise characteristics,and found that larger frequency components of the substation noiseenergy are mainly concentrated below 500 Hz,and they are also integral multiples of 100 Hz. These characteristic signals are relatively stable over time,and will not be mutated. In the light of the deficiencies of traditional substation noise passive control method,this article presents an improved variable step size LMS adaptive filtering algorithm combined with the adaptive active noise control technology. By simulating,we verify the performance of the improved algorithm and process the measured data by using the improved algorithm. The results show that the noise reduction algorithm can achieve satisfactory results. This article focuses on the substation noise signature and improvs the variable step size LMS adaptive filtering algorithm.

关 键 词：变压器噪声 收敛速度 收敛精度 变步长 

分 类 号：TM401[电气工程—电器]