A modular grid-connected photovoltaic generation system

作者：Zhang Li^*; Sun Kai; Feng Lanlan; Wu Tianjin; Xing Yan; Ge Hongjuan

来源：Proceedings of the CSEE, 2011, 31(1): 26-31.

• Decoupling
• Distributed
• Grid-connected
• Inverter
• Parallel

A modularized grid-connected photovoltaic generation system was proposed, which consists of modular DC/DC converters and modular inverters. The output of DC/DC converter and the input of inverter share the DC bus. The AC current coupling in parallel operation was investigated. A current decoupling control was proposed and implemented by regulating the currents through both the fire-wire and neutral-wire filter inductors respectively. A control for the system efficiency (especially the light load efficiency) optimization for the photovoltaic generation system was proposed by utilizing the tolerance of the control parameters. Only one of the modular inverters is operating with non-full load and the others are operating either with full-load or at stand-by. A prototype system was built with both the steady-state and dynamic experimental results given, to verify the feasibility of the proposed system and the effectiveness of the control strategies.

• 出版日期2011
• 单位南京航空航天大学