【摘要】 提出一种基于切换仿射线性模型和切换系统全局稳定理论的三相有源电力滤波器(active power filter,APF)电流控制方法。该方法首先建立了任意运行点下的三相APF的切换仿射线性系统模型,再根据凸组合稳定条件,将一个工频周期按三相母线电压大小划分为12个区间,在每个区间内设定能满足二次稳定条件的开关子系统组合,并为系统选取共同的李亚普诺夫(Lyapunov)函数,基于切换系统理论控制方法的设计思路,提出了建立在切换仿射线性模型基础上的二次稳定控制策略。最后进行了仿真分析并验证其可行性。更多还原

【Abstract】 A novel current control method for three-phase active power filter(APF) based on switched affine system and quadratic stability was proposed.The three-phase APF was modeled as a switched affine system in any operation points through coordinate transformation.One power frequency cycle was divided into 12 fractions.In each fraction,a combination of switching subsystems was set up according to the requirement of quadratic stability condition.The common Lyapunov function was selected.Based on the switched system theory,a quadratic stability control method featured by high tracking accuracy and low switching frequency was proposed.The validity of the proposed control method was proved with Matlab/Simulink.更多还原