逆变器闭环增益成形控制策略研究

Research on Inverter Control Strategy of Closed-loop Gain Shaping

负载反馈扰动是造成逆变器输出畸变的主要原因之一。通过结构框图等效,在连续域建立了单相半桥逆变器的简化扰动模型,从而把负载扰动转化成灵敏度极小化问题。在此基础上提出了一种基于闭环增益成形的单相半桥逆变器控制策略,仿真与实验结果验证了理论的有效性。

Load feedback disturbance is one of the main reasons which leads to distortion of the inverter output.In this paper,the equivalent block diagram is made to establish single-phase half-bridge inverter simplified perturbation model in the contin- uous domain,which translates into a sensitivity minimization problem.On this basis,a new control strategy is proposed for the half-bridge inverter based on closed-loop gain shaping.Simulation and experimental results verify the validity of the theory.