基于PCHD模型的二次型Boost变换器无源混合控制

Passive hybrid-control of quadratic boost converter based on PCHD model

为了提高二次型Boost变换器的性能,根据二次型Boost变换器的拓扑结构,建立了基于端口受控耗散哈密顿(port controlled hamiltonian with dissipation,PCHD)模型,提出了无源控制和PI控制相结合的无源混合控制策略。基于PCHD模型,采用互联和阻尼配置方法,设计了无源电流控制器;为了消除系统稳态误差,设计了电压外环PI控制器以提供无源电流控制器期望电流给定。仿真结果表明,无源混合控制的二次型Boost变换器有良好的静态和动态性能,所提的控制策略是可行的。

To improve the performance of the quadratic Boost converter,the PCHD（ port controlled hamiltonian with dissipation） model is established according to the topology of quadratic boost converter.A passive hybrid-control strategy is proposed,combining passivity-based control and conventional PI control. Based on the PCHD model,the passive current-controller is designed by using the method of interconnection and damping assignment. To eliminate the stable error,the desired-current of the passive current-controller is given by PI controller in the outer loop. The simulation results show that the quadratic Boost converter based on passive hybrid-control has good static and dynamic performances,and the proposed control strategy is feasible.