基于单周控制的光伏双频并网逆变器研究  

Research on photovoltaic dual frequency grid-connected inverter based on one-cycle control

作　　者：万江 陈铁 郭真红 庹元科[2] 吴真 郑继红 徐波 曾寅川 

机构地区：[1]重庆电力公司超高压局,重庆400039 [2]重庆大学电气工程学院,重庆400044

出　　处：《电力系统保护与控制》2010年第1期10-13,共4页Power System Protection and Control

摘　　要：提出一种用于光伏发电的双频并网逆变器,该拓扑结构由两个半桥单元级联而成。其中一个半桥工作在高频,提高输出电流性能,另一个半桥工作在低频,主要输出功率,从而提高系统效率。高频桥采用单周控制技术,建立了单周控制方程。仿真结果表明逆变器输出电流总的谐波畸变率低,有较好的动态性能。A novel grid-connected dual frequency inverter for photovoltaic generation is proposed. The inverter consists of two cascaded standard half bridges, one of the half bridges works in high frequency to improve the performance of output current and the other one works in low frequency to handle power thereby the switching losses can be reduced and the system efficiency can be improved. For the high frequency half bridge, the one-cycle control is adopted. The simulation results illustrate that the inverter is controlled to generate the output current in phase with the grid voltage with low harmonic distortion and better dynamic performance.

关 键 词：双频并网逆变器 高效率 光伏发电 单周控制 

分 类 号：TM464[电气工程—电器]