单相全桥逆变器状态反馈精确线性化控制

摘要

Based on state feedback linearization control theory and linear quadratic control theory, a novel single-phase full-bridge inverter control strategy was proposed in the paper. The nonlinear affine model of the system was set up. The nonlinear state feedback transform equation was derived and the nonlinear system had been realized linearization via state feedback linearization control theory. Further,this paper proposed a linear quadratic performance target based on passivity considerations. The feedback coefficients were optimized using the linear quadratic control theory. The control scheme proposed has advantage of simple controller structure,low cost and easy to implement with DSP. The validity of the control scheme was verified by numerical simulation. Highly accurate steady output,less distorted waveform and strong robust to the disturbance of load were gained based on the proposed control scheme.%基于状态反馈精确线性化和二次型最优控制方法，提出了一种新型单相逆变器非线性控制策略。建立了单相全桥逆变器的仿射非线性模型。采用状态反馈精确线性化方法，推导出非线性状态反馈表达式，实现非线性系统的线性化。基于无源性控制思想，提出一种二次型性能指标，利用二次型最优控制对状态反馈系数进行优化设计。该文所提控制系统结构简单，成本低，易于数字实现。数值仿真验证了所提方法的正确性。基于所提控制方法的系统输出无稳态误差，输出电压谐波畸变率小，并对负载扰动具有较强的鲁棒性。