【摘要】 提出了一种带锁频环(FLL)的延时信号消除锁相环(DSC-PLL),FLL采用递归离散傅里叶变换(RDFT)及其反变换的方法实现。当电网电压频率发生变化时,基于RDFT的FLL能跟踪电网电压频率的变化,保持频率检测和相角检测的准确性,从而提高了DSC-PLL的锁相性能。最后,实验结果验证了该方法的正确性和有效性。更多还原

【Abstract】 A delayed signal cancellation phase locked loop(DSC-PLL) with frequency locked loop(FLL) based on recursive discrete fourier transform(RDFT) and its inverse transformation method is proposed. When the grid voltage frequency variated, the RDFT-FLL can track the variation, so accuracy of frequency and phase angle detection is maintained. This method improves the performance of DSC-PLL.The validity of the method is verified by experiment results.更多还原