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为了提高有源电力滤波器的动态性能,基于切换系统理论研究其电流跟踪控制问题.首先,建立系统的切换动态模型,根据切换系统理论和空间电压矢量法证明二次稳定性,并设计相应的切换控制序列.考虑到控制器的数字化实现,建立系统的离散切换系统模型,提出在采样周期内使系统性能最优的切换控制策略.仿真结果表明,该控制策略能实现对指令电流的精确跟踪,降低功率器件的开关频率,从而有效地提高系统的动态性能.
In order to improve the dynamic performance of the active power filter, the current tracking control problem is studied based on the switching system theory.Firstly, the dynamic model of the switching system is established, and the secondary stability is proved by the switching system theory and the space voltage vector method. Correspondingly, Switching control sequence.Considering the digital realization of the controller, the discrete switching system model of the system is established, and the switching control strategy that makes the system performance optimal during the sampling period is proposed.The simulation results show that this control strategy can accurately track the command current , Reduce the switching frequency of power devices, thus effectively improve the dynamic performance of the system.