基于DSP间谐波检测算法的研究

发布时间：2018-08-14 08:48

【摘要】：本文论述了对间谐波的检测算法进行的研究,在FFT检测的基础上,采用加窗插值算法,对Hanning窗、Blackman窗、Blackman-Harris窗、三项Nuttall窗、四项Nuttall窗的间谐波检测进行了研究,并对检测结果进行了对比分析,计算结果表明四项Nuttall窗插值FFT算法的检测精度最高。采用小波变换的检测算法-递归算法对间谐波进行了检测,计算结果表明基于小波变换的递归法对于间谐波的检测有更好的性能。设计了以TMS320F2812为核心的硬件检测系统,完成了对三相电压电流的采集,并实现了对间谐波的检测。采用C语言完成了算法在DSP硬件平台上的移植。四项Nuttall窗插值FFT算法应用于间谐波检测的仿真和实验表明,四项Nuttall窗旁瓣性能好,对于改善频谱泄漏现象有很好的作用,相对于其他检测算法而言有较好的检测性能;基于小波变换的递归滤波器分析方法,将其算法在DSP硬件平台上成功进行了移植,完成功能测试,满足精度要求的同时兼顾了实时性的需要。
[Abstract]:In this paper, the research on the detection algorithm of interharmonics is discussed. On the basis of FFT detection, the Interharmonics detection of Hanning window Blackman window Blackman-Harris window, three Nuttall window, four Nuttall window is studied by using the windowed interpolation algorithm. The comparison and analysis of the detection results show that the four Nuttall window interpolation FFT algorithm has the highest detection accuracy. The recursive algorithm of wavelet transform is used to detect interharmonics. The results show that the recursive method based on wavelet transform has better performance for detecting interharmonics. The hardware detection system based on TMS320F2812 is designed. The acquisition of three-phase voltage and current and the detection of interharmonics are accomplished. The algorithm is transplanted on DSP hardware platform with C language. The simulation and experiments of four Nuttall window interpolation FFT algorithms used in interharmonic detection show that the four Nuttall window sidelobes have good performance and can improve the spectrum leakage phenomenon, and have better detection performance compared with other detection algorithms. The recursive filter analysis method based on wavelet transform is successfully transplanted on the DSP hardware platform to complete the function test, which meets the requirement of accuracy and the need of real-time.
【学位授予单位】：河北科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM935

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