单片机船舶电网谐波分析仪的设计与研究

Design of Marine Electricity Grid Harmonic Analyzer Based on Singlechip

本文介绍了快速傅立叶变换的离散算法,并在此基础上设计程序。设计所用的分析信号由电网电压经互感器得到,所用单片机型号为dsPIC30F4011,安装在APP009实验电路板上。程序设计部分主要包括A/D转换部分及FFT变换部分等。实验中,通过A/D转换进行采样,得到一组离散的采样点,通过快速傅立叶变换(FFT)对采样信号进行频谱分析,实验结果表明该测试仪可以实现对电网的各次谐波进行有效检测。

This paper introduces the discrete arithmetic of Fast Fourier Transform. The program is designed based on it. The signals are gained from electricity grid by mutual inductance implement, and the singlechip dsPIC30F4011 is installed in the experimental circuit board APP009. The program mainly includes A/D converting part and the FFT converting part, etc. In the experiment, through the A/D converter a group of discrete sampling points are received. The sampling signals are analyzed with the Fast Fourier Transform （FFT）. The experiment shows the analyzer can effectively examine harmonic from electricity grid.