基于自适应比例谐振的新型并网电流控制策略  

Novel Grid-Connected Current Control Strategies Based on Self-Adaptive Proportional-Resonant

作　　者：刘斌[1] 谢积锦[1] 李俊[1] 伍家驹[1] 

机构地区：[1]南昌航空大学信息工程学院,南昌330063

出　　处：《电工技术学报》2013年第9期186-195,共10页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51167014);江西省科技支撑计划(2010BGA01000);江西省教育厅科技项目(GJJ11516)

摘　　要：针对单相并网逆变器中电流环比例积分(PI)控制不能无差跟踪正弦参考信号及市电频率漂移时谐振控制器控制效果不佳等问题,提出了一种新颖的自适应比例谐振控制器,基于一特定的滤波器由闭环控制动态调整谐振控制器的谐振频率点,使得市电频率漂移时并网电流依然能够实现零稳态误差。数学分析、仿真和实验进一步验证了所设计的控制器的正确性和可行性。Due to the problem that proportional-integral （PI） controller for current loop can not achieve zero-tracking-error in single-phase grid-connected inverter, and that performance of the controller may be affected when there is grid frequency shifting, a novel self-adaptive proportional resonant controller is proposed, which adjusts the resonant frequency point of resonant controller automatically based on a special filter through close-loop control so that grid-connected current can still achieve zero steady-state error when considering grid frequency shifting. Math analysis, simulations and physical experiments validate the validity of the proposed controller.

关 键 词：比例谐振 自适应 频率漂移 并网逆变器 

分 类 号：TM464[电气工程—电器]