基于李雅普诺夫函数的三相有源电力滤波器控制策略

摘要

The model of APF(Active Power Filter) is built by dq transformation based on switching function and a control method based on Lyapunov function theory is proposed,which,independent of circuit parameters, simplifies the harmonic detection to reduce calculation load and removes PI controller by eliminating the decoupling during calculation to simplify the circuit structure. It considers the influence of inaccurate reference value on system and determines the range of control parameter according to the proposed average error indicator to make the system control globally stable. Simulative and experimental results demonstrate its feasibility.%基于开关函数并采用dq方法对有源电力滤波器系统进行建模,提出了一种基于李雅普诺夫函数理论的新型控制方法.该方法谐波检测环节简单,计算量少;所提出的控制策略不依靠电路参数；计算过程中可消除耦合,省去了PI控制器解耦环节,使电路结构简化；考虑参考值不精确对系统的影响,并根据提出的平均误差指标,共同确定控制参数的取值范围,使系统控制达到全局稳定.仿真结果表明基于李雅普诺夫函数的有源电力滤波器具有良好的补偿效果.