三相并联型有源滤波器的滑模控制方法

摘要

This paper presents a unity control strategy based on sliding mode theory to control compensation current and voltage of DC side as a whole. There is hence no need to divide the system model which is developed in the synchronous dq reference frame into two separate loops. The modeling is based on the abc/dq transformation of the ac system variables. So a unity control strategy based on sliding mode theory is presented with the object of the minimal tracking error of compensation current and voltage of DC side, and the equivalent control is proven its existence theoretically. The conditions of its accessibility are also presented which means that the parameters ranges of accurate of sliding surface can be obtained. Simulation results show the validity of the performances considered theoretically for the compensations required by the shunt active filter.%提出了一种基于滑模控制理论的有源电力滤波器补偿电流和直流侧电压的统一控制策略，避免了补偿电流与直流侧电压由两个闭环分别进行控制。建立了并联型有源电力滤波器在abc和αβ坐标系下的数学模型，提出了在ap坐标系下的以跟踪误差最小为目标的补偿电流和直流侧电压的滑模控制策略，证明了该控制策略的等效控制的存在性，推导出该滑模控制的可达性条件，可以准确获得滑模面的取值范围。仿真结果证明了该方法的有葱僻．