提出了一种计算有源电力滤波器谐波参考电流的新方法 ,它是对传统傅立叶分析法的一种改进 ,综合利用了滑动窗口数据技术、基于DSP的循环寻址技术、查表技术以及基于锁相环 (PLL)的同步采样技术 ,既继承了传统傅立叶分析法良好的稳态特性 ,也有效地解决了传统FFT和DFT方法延时长的问题。另外还给出了基于DSP的实现方案 ,并通过实验验证了所提出方法的高效性和高精度性。 A new method to calculate harmonic reference current of active power filter is proposed. It is an improvement on the traditional Fourier analysis method. It uses sliding window data technology, circular addressing technology based on DSP, look-up table technology and The phase-locked loop (PLL) -based synchronous sampling technique not only inherits the good steady-state characteristics of traditional Fourier analysis, but also effectively solves the problem of long delay in traditional FFT and DFT methods. In addition, an implementation scheme based on DSP is given, and the efficiency and accuracy of the proposed method are verified through experiments.