基于状态反馈精确线性化单相全桥逆变器的最优控制  

Optimal Control of Single-Phase Full-Bridge Inverters by State Feedback Linearization

作　　者：帅定新[1,2] 谢运祥[1] 杨金明[1] 王晓刚[1] 

机构地区：[1]华南理工大学电力学院,广州510640 [2]攀枝花学院电气信息工程学院,攀枝花617000

出　　处：《电工技术学报》2009年第11期120-126,共7页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(60534040)

摘　　要：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。数值仿真和实验结果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。Based on state feedback linearization control theory and linear quadratic control theory, a novel single-phase full-bridge inverter control strategy is proposed in the paper. The nonlinear affine model of the system is set up. The nonlinear state feedback transform equation is derived and the nonlinear system is realized linearization via state feedback linearization control theory. Further, this paper proposes a linear quadratic performance target based on passivity considerations. The feedback coefficients are 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 is verified by numerical simulation and experiment results. Highly accurate steady output, less distorted waveform and strong robust to the disturbance of load are gained based on the proposed control scheme.

关 键 词：单相全桥逆变器 状态反馈 精确线性化 二次型 无源性 最优控制 

分 类 号：TM464[电气工程—电器]