摘要
介绍了一种基于LCL滤波器并网逆变器的鲁棒电流控制器设计。该控制器的设计同时考虑了电网阻抗参数的不确定性和内模控制器对参考电流的跟踪和抑制电网的扰动。通过逆变器的状态变量和内模控制原理的结合设计出了鲁棒状态反馈控制器。最后,搭建了仿真平台,对鲁棒状态反馈控制器和PI控制器分别进行仿真与分析,结果表明鲁棒状态反馈控制器对电网负载变化具有良好的抑制作用。
A robust current controller for grid-connected converters with LCL-filter was presented. The design of the controller considers uncertainty on the grid impedance parameter and includes an internal model structure that ensures asymptotic tracking of the sinusoidal current reference as well as disturbance rejection of the background voltage. A state feedback control law, which depends on the states of the converter and of the internal model controller, was considered here. Finally, a simulation platform was designed, a robust state feedback controller and PI controller were simulated, the results show that the robust state feedback controller has a good inhibitory effect on the grid load.
出处
《电源学报》
CSCD
2013年第2期62-66,共5页
Journal of Power Supply
基金
国家自然科学基金项目(61174064)
国家重点基础研究发展计划(973计划)项目(2012CB720502)
中央高校基本科研业务费专项资金资助项目(WJ0913001)
