有源电力滤波器反馈精确线性化重复控制

Repetitive Control of Active Power Filter Based on Exact Feedback Linearization

提出了三相四线制有源电力滤波器(APF)反馈精确线性化重复控制的电流复合控制策略。通过反馈精确线性化方法得到三相四线制电容中分式APF的可控线性化模型,实现有功电流和无功电流的解耦控制;根据重复控制理论设计基于重复控制的电流控制器。控制方法结合了精确反馈线性化非线性控制与重复控制的优点,改善了控制精度和补偿效果,提高了系统的动态响应速度和稳态性能。

In this paper, a hybrid control strategy with the exact feedback linearization and repetitive control for three-phase four-wire active power filter （ APF ） was presented. By exact feedback linearization, a linear model for three-phase four-wire center-split APF was obtained, realizing the decoupling control of active and reactive power compensation current. According to the repetitive theory, repetitive controller was designed and applied to the current control loop. The proposed strategy achieves both the advantage of exact feedback linearization and repetitive control. The control precision and dynamic response performance are improved, while the steady-state behavior and compensation effect for APF are also enhanced.