基于船舶电网的FFT谐波检测方法

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。

A method of FFT harmonic detection based on ship power network

The accurate detection of harmonic content in the power network of the ships electric propulsion system is very important. In order to further improve the accuracy of harmonic measurement, this paper improve the Blackman window function, and use the bimodal spectral lines interpolation algorithm to detect the power signal of marine electric power system. Use the software to approximate the parameters of improved window function, and set up the experimental platform. By comparing the measured results of adding different Window functions, we can get the conclusion that the improved Blackman window can effectively improve the accuracy of the harmonic detection.