采用逆系统方法的混合有源电力滤波器逐步反推滑模控制

提出一种基于逆系统方法的逐步反推(backstepping)滑模控制策略.在明确混合有源电力滤波器(SHAPF)的仿射非线性模型具有强耦合非线性特点后,利用逆系统方法进行线性化解耦,与原系统复合形成2个独立的伪线性子系统.设计伪线性子系统建模和参数不确定性误差的backstepping滑模控制器.与传统控制策略的仿真对比表明:所提控制策略可进一步提高SHAPF的滤波性能.

Backstepping Sliding Mode Control of SHAPF Using Inverse System Method

In this paper, a backstepping sliding mode control strategy based on inverse system method is proposed. The strong coupling nonlinearity is confirmed,which is the features of affine nonlinear model of shunt hybrid active power filter(SHAPF), the inverse system method is used to linearize the decoupling. Then, two independent pseudo-linear subsystems are formed by combining with the original system. The backstepping sliding mode controller that system modeling and the parameter uncertainty error are taken into account is designed for two independent pseudo-linear subsystems. By the comparing with the simulation of the traditional control strategy, the proposed control strategy can further promote the filtering performance of SHAPF.