【摘要】 传统的比例谐振PR调节器可以在静止坐标系下对基波交流量进行无差控制,简化了控制系统设计,因此,在很多场合得到了广泛的应用。但在静止坐标系下采用PR调节器进行电流控制时,并网逆变器GCI的控制性能与同步旋转坐标系下基于解耦PI调节器相比有较大的差别。本文基于GCI的复矢量数学模型分析了静止坐标系下闭环控制系统的控制性能,设计了一种改进型PR调节器。静止坐标系下GCI采用此调节器可以达到与同步旋转坐标系下采用解耦PI调节器时相同的控制性能,改善了系统的动态性能。仿真和实验结果验证了本文提出方法的有效性和可行性。更多还原

【Abstract】 Traditional proportion resonant(PR) controller is able to achieve zero steady-state error for fundamental frequency AC signal, and it is widely used for simplifying the control system in stationary frame. However, the performance of grid-connected inverter(GCI) differs greatly with PI controller in synchronous frame when using PR controller in stationary frame. This paper analyzes the control performance of the closed system based on complex vector model of GCI, and a novel current controller is proposed. The GCI uses the novel controller in stationary frame can attain same performance with PI controller in synchronous frame, and the dynamic response can also be improved. Simulation and experimental results verify the availability of the novel current controller.更多还原