基于改进窗函数的船舶电网谐波检测方法  

A Harmonic Detection Method Based on Improved Window Function For Ship Power Network

作　　者：郝柱[1] 顾伟[1] 褚建新[1] 

机构地区：[1]上海海事大学航运技术与控制工程交通部重点实验室,上海201306

出　　处：《电测与仪表》2014年第15期74-79,共6页Electrical Measurement & Instrumentation

摘　　要：在船舶电力推进系统中,准确检测电网中各次谐波含量是十分重要的。为了进一步提高对谐波测量的准确度,本文通过改进布莱克曼窗函数,采用双峰谱线插值算法来对船舶电力系统的电量信号进行检测。通过软件对改进窗函数的参数进行数据拟合,并搭建仿真实验平台。通过对比添加不同窗函数所测量的结果,可以得出,改进的布莱克曼窗可以有效地提高对谐波检测的准确度。Accurate detection of harmonic components is very important for power network of ship electric propulsion system.In order to further improve the accuracy of harmonic measurement , this paper improves the Blackman window function, and uses the bimodal spectral line interpolation algorithm to detect power signal of marine electric power sys -tem.The parameters of the improved window function are approximated with the software , and an experimental plat-form is built.By comparing measured results of adding different window functions , it is shown that the improved Black-man window can effectively improve the accuracy of harmonic measurement .

关 键 词：插值算法 谐波检测 快速傅里叶变换 数据拟合 

分 类 号：TM933[电气工程—电力电子与电力传动]