基于DSP的电力谐波分析方法

主要研究了基于DSP-TMS320C5402芯片的电力谐波检测,用于进行谐波分析算法的实现。一部分构建基于Matlab仿真平台的模拟谐波,通过在Matlab中对模拟谐波的FFT预处理结果和所构建的检测系统处理结果相比较,验证了该系统的检测准确性。另一部分在DSP实验箱上搭建了A/D硬件采样电路,同时对FFT的固有缺陷提出了相应的加Blackman窗解决方案,实现了对基2-FFT的汇编语言程序调试,通过改变实验箱上信号源的频率,使用该电力检测系统检测了方波信号和不同频率下的正弦波信号,在CCS软件的图形显示器中将FFT后的运行结果以幅值-频率的信息曲线图显示了出来,实现了对电力谐波较准确的分析。文章设计的谐波分析检测系统能够较准确地分析出谐波信号的信息。

This paper studies the power harmonic detection based on DSP- TMS320C5402 chip, used for realization of the harmonic analysis algorithm. Part of the thesis build a simulation-based harmonic Matlab simulation platform. The pre-processing results to the FFT in Matlab simulation and harmonic detection system processing results that was constructed have been compared to verify the accuracy of the detection system. Another part is to build DSP A /D sampling hardware on the experimental box, while corresponding the Blackman window solutions to the inherent flaws of the proposed FFT have been put forward and the radix-2 - FFT butterfly knot assembly language program debugging has been implemented. By changing frequency of signal source on the experimental box, using the power of the sine signal to detection system to detect a square wave signal and the sine wave signal at different frequencies and after the FFT the operation results in the graphical display of CCS software display as an infonnation graph of amplitude - frequency, a more accurate analysis of the power harmonics has been achieved. In this thesis, haimonic analysis and detection system can analyze the haimonic signals information more accurately.