滑窗迭代DFT法APF直流侧稳压控制研究

摘要

The active power filter ( APF) is a novel method of dynamic harmonic suppression .The compensation per-formance of APF is determined by the link of detection and control .At the same time , the DC voltage balance control is the prerequisite for APF to work normally .The detection method of harmonic current based on sliding-window itera-tive algorithm of DFT is introduced in this paper .And a DC side voltage control strategy is proposed based on each phase split current .The design method of PI parameter for voltage loop from the perspective of power balance , there-fore, the simulation model is set up and the experimental prototype is designed .The correctness of sliding-window it-erative algorithm of DFT and proposed DC side voltage control strategy is verified by simulation and experiment .%有源电力滤波器(APF)是抑制电网谐波的新型方法,其补偿性能主要取决于谐波检测环节和控制环节,同时直流侧稳压控制是APF正常工作的前提.引入滑窗迭代DFT谐波电流检测方法;提出一种稳压电流各相均分的直流电压控制策略;从功率平衡的角度分析了电压环PI调节器参数设计方法.建立仿真模型及设计实验样机,仿真和实验均验证了滑窗迭代DFT法谐波检测的快速性和精确性,以及所提直流侧稳压控制策略的正确性.