中文摘要：

针对独立直流微电网的功率协调控制问题,提出了一种无源控制PBC（Passivity-Based Control）与PI控制级联的PBC-PI控制策略。建立了系统的端口受控哈密顿PCH（Port-Controlled Hamiltonian）模型,设计了系统的PBC控制器。考虑到系统参数扰动等原因,PBC控制器会在直流母线电压上产生稳态误差,为了消除这一稳态误差,改善闭环系统对于参数扰动的鲁棒性,设计了外环PI控制器调节直流母线电压。仿真结果表明,PBC-PI控制策略可合理调节微电网的功率平衡,稳定直流母线电压;并改善闭环系统对于参数扰动的鲁棒性。

英文摘要：

A control strategy based on the cascaded PBC（Passivity-Based Control） and PI control is proposed for the coordinated power control of isolated DC microgrid. Its PCH（Port-Controlled Hamiltonian） model is established and its passivity-based controller is designed. An outer-loop PI controller is developed to eliminate the steady-state errors of DC bus voltage caused by the parameter disturbance for improving the robustness of closed-loop system. The simulative results show that,the PBC-PI control strategy could reasonably adjust the power balance of DC microgrid,stabilize the voltage of DC bus and improve the robustness of closed-loop system against parameter disturbance.