基于复合控制的单相并网逆变器研究  

Research on Single-phase Grid-connected Inverter Based on Hybrid Control

作　　者：王淑惠[1] 鞠文耀[1] 贾中璐[1] 

机构地区：[1]中国电子科技集团公司第十四研究所,江苏南京210039

出　　处：《电力电子技术》2011年第2期8-9,43,共3页Power Electronics

摘　　要：单相并网逆变器并网电流中含有大量谐波,传统的PI控制器难以满足波形跟踪需要,此处采用比例+重复的复合控制算法用于逆变器电流环控制器设计,通过串联校正调整控制对象幅频、相频特性,重复控制器可以提高系统稳态性能,通过比例控制器可以保障其动态响应速度,并给出了复合控制器详细设计方法。搭建了一台单相并网逆变器实验平台,通过实验证明了方案和分析的正确性。Usually grid current contains large amounts of harmonic currents, but the traditional PI control can not real- ize accurate waveform tracking.To solve this problem,a hybrid control method including proportional control and repetitive control is adopted in current loop controller design.The characteristics of both amplitude frequency and phase frequency of control object are adjusted through series rectification, and steady state performance is improved and dynamic response speed could be guaranteed owing to repetitive controller and proportional controller, respectively.Also the process of this hybrid controller is illustrated in detail.Both the simulation and experimental results show that this control strategy is correct and effective.

关 键 词：并网逆变器 电流环 重复控制器 谐波抑制 

分 类 号：TM46[电气工程—电器]