基于内模原理的并网逆变器双模PI控制  

Internal Model Principle Based Dual-Mode PI Control for Grid-Tied Inverters

作　　者：王吉彪[1] 陈启宏[1] 张立炎[1] 周克亮 Wang Jibiao;Chen Qihong;Zhang Liyan;Zhou Keliang(School of Automation Wuhan University of Technology Wuhan 430070 China)

机构地区：[1]武汉理工大学自动化学院,武汉430070

出　　处：《电工技术学报》2018年第23期5484-5495,共12页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(61673306;61673305)

摘　　要：并网逆变器是分布式发电系统与电网之间的重要接口,其输出电能质量直接关系到电网的可靠运行。为抑制逆变器引入电网的谐波,该文针对并网逆变器周期性信号的精确控制问题开展研究,结合常规PI控制器以及内模原理控制器的优点,将奇、偶次谐波内模作为积分环节并取代常规PI控制中的积分器,构造出基于内模原理的双模PI控制器。该双模PI控制器既具有常规PI响应速度快、鲁棒性好以及参数设计简单的优点,又可以实现对周期信号的无静差跟踪控制,能够有效抑制电网谐波扰动。同时,双模PI控制器可实现对奇、偶次谐波的独立控制,具有优异的谐波抑制效果。仿真与实验验证了该方法的有效性。Grid-tied inverters are important power interfaces between distributed power generation systems and grid.Power quality of the grid-tied inverter is directly related to the reliable operation of the grid.In order to depress harmonic of the inverter injected into the grid,this paper combined the advantages of conventional PI controller and internal model controller,used the odd and even harmonic internal modules to replace the integrator in conventional PI,and constructed dual-mode PI controller based on internal model principle.The dual-mode controller not only has the advantages of conventional PI controller,such as fast response,good robustness and simple parameter design,but also can realize zero steady error control,and effectively suppress the harmonic disturbance of the power grid.Meanwhile,the proposed controller can separate control odd and even harmonics.As a result,harmonics suppression is more effective.Simulation and experimental results demonstrated the proposed method.

关 键 词：并网逆变器 内模原理 无静差控制 谐波抑制 

分 类 号：TM464[电气工程—电器]