基于FPGA的谐波检测技术的研究

Research of FPGA-based Harmonic Detection Technology

针对目前电网谐波严重影响电能质量的问题,利用FPGA技术并选用Fusion AFS600系列芯片来实现谐波信号采集、模数转换和快速傅里叶变换(FFT)等信号处理流程,达到谐波检测的目的。先介绍了基于FFT的谐波检测原理,并以三角波为例加以说明;然后设计A/D转换与FFT部分;最后用逻辑分析仪测量芯片中FFT输出引脚的电平,得出实验结果,并将实验结果与理论值进行比较,从而验证设计的正确性。

Aiming at the growing problem of power harmonics, FPGA technology has been used and Fusion AFS600 chips has been selected to achieve harmonic signal＇s collection, A/D conversion and FFT, in order to detect harmonic. Firstly, it introduces the FPT-based harmonic detection principle, and illustrates by the triangular wave, then design the A/D conversion and FFT. Lastly, the logic analyzer is used to measure FFT output pins＇ level, and the experimental results are obtained, which are compared with the theoretical value, to verify the correctness of the design.