基于改进窗函数的船舶电网谐波检测方法

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 .