基于VPI与模型预测电压相结合的电流跟踪控制策略研究

四桥臂有源电力滤波器(Active Power Filter,APF)电流跟踪控制以矢量控制居多,该控制方式一般都是通过控制器与调制算法相结合来实现的。电流跟踪性能的好坏主要受到控制器的影响。矢量比例积分(Vector proportional integral,VPI)控制器是比例谐振(Proportional Resonance,PR)控制器的改进,能有效提高电流补偿效果。而模型预测控制也在各个领域得到了广泛应用,包括在电力电子领域等。将两种控制策略结合在一起,使得系统在稳态时利用VPI矢量控制方式,在动态时切换至模型预测电压控制方式,充分发挥两种控制策略各自的优势。

The current tracking control of four-leg APF is mostly based on vector control,which is usually realized by the combination of controller and modulation algorithm.The performance of current tracking is mainly affected by the controller.VPI controller is an improvement of PR controller,which can effectively improve the current compensation effect.Model predictive control has been widely used in various fields,including power electronics.The combination of the two control strategies makes the system use of VPI vector control in the steady state,switch to model predictive voltage control in the dynamic state,and give full play to the advantages of the two control strategies.