并联混合有源滤波器逆系统解耦控制

Inverse system method based decoupling control of shunt hybrid active power filter

中文关键词  谐波  混合有源滤波器  逆系统  极点配置  零动态

英文关键词  harmonics  hybrid active power filter  inverse system  pole assignment  zero dynamics

中文摘要

      针对并联混合有源滤波器(SHAPF)这一强耦合非线性系统的控制问题, 提出了一种基于逆系统方法的SHAPF反馈线性化解耦控制策略. 首先根据SHAPF非线性数学模型, 采用逆系统方法生成其®阶积分逆系统, 进而构造出解耦的伪线性系统, 然后利用极点配置方法对伪线性系统进行综合, 设计了系统的闭环控制器, 并给出了系统零动态的镇定条件, 保证了闭环控制系统的稳定性. 最后仿真实验表明该控制策略能够有效消除电网中的谐波电流, 并且与传统线性反馈–前馈控制策略相比, 该控制策略具有更好的动静态性能.

英文摘要

      To tackle the strong coupling and nonlinearity of the shunt hybrid active power filter (SHAPF) system, we propose a novel feedback linearization control strategy based on the inverse system method. To the nonlinear model of SHAPF, we apply the inverse system method to produce its ®th inverse system, from which the decoupled pseudo-linear system is obtained. This pseudo-linear system is synthesized by using the pole assignment method to design the controller for the closed-loop system. The stabilization condition of the zero dynamics of the SHAPF is presented, which ensures the stability of the close-loop system. Simulations show that the harmonics can be effectively eliminated by the proposed control strategy, and a better steady-state and transient performances can be achieved in comparison with the traditional linear feedback-feedforward control strategy.