标题：Robust control of two-stage photovoltaic inverter for unbalanced low voltage ride-through operation
作者：Tian, Hao ;Gao, Feng ;Ma, Cong ;He, Guoqing ;Li, Guanghui
作者机构：[Tian, Hao ;Gao, Feng ;Ma, Cong ] School of Electrical Engineering, Shandong University, Jinan, China;[He, Guoqing ;Li, Guanghui ] China Electric Powe 更多
会议名称：2014 International Power Electronics and Application Conference and Exposition, IEEE PEAC 2014
会议日期：5 November 2014 through 8 November 2014
来源：Proceedings - 2014 International Power Electronics and Application Conference and Exposition, IEEE PEAC 2014
关键词：DC-link voltage; Low voltage ride-through; PR regulator; Unsymmetrical fault
摘要：Since low voltage ride-through (LVRT) was proposed, its improvements have never been stopped, especially the improvements for operation under unbalanced faults. In this paper, an overall control strategy is proposed to solve the problem that the output current quality and dc-link voltage quality cannot be guaranteed at the same time. For this propose, a current control method is employed to guarantee the symmetrical and sinusoidal output current and a dc-link voltage regulation method is proposed for two-stage PV inverter to improve the performance of dc-link voltage either. The Matlab simulation results prove the effectiveness of proposed method. © 2014 IEEE.