三相三线制有源滤波器的改进无差拍控制

针对平推预测无差拍控制存在稳态误差的问题,提出了一种改进的有源电力滤波器控制策略。该方法将重复控制器嵌入基于平推预测的无差拍控制,结合重复控制和无差拍控制优势,弥补无差拍控制的固有缺陷,快速消除每一采样周期的稳态误差。根据有源电力滤波器的数学模型,得到应用于电流环的无差拍控制算法,给出了重复无差拍控制电流环各个子环节的设计过程。基于Matlab仿真环境和物理实验平台对所提控制策略进行分析,验证了所提方法的有效性和优越性。

A deadbeat control scheme for three-phase three-wire active power filter

The flat-push prediction deadbeat control is of steady-state error. In order to avoid this defect, an improved control strategy based on active power filter is proposed. Compared with traditional deadbeat control, this method embeds the repetitive controller into flat-push prediction deadbeat control, combines with advantages of repetitive control and deadbeat control, and avoids the inherent deficiencies of deadbeat control. At the same time, it fast eliminates the steady-state error of each sampling period. Based on the active power filter mathematical model, the deadbeat control algorithm applied in current loop is deduced, and the design of repetitive deadbeat control for each sub-loop of current loop is given. The results of simulation and experiments based on Matlab demonstrate the effectiveness and superiority of the proposed method.