An integrated three-port inverter for stand-alone PV applications

This paper presents a novel concept of integrated three-port interface for stand-alone photovoltaic applications. The three-port topology interfaces one solar panel input port and one bi-directional battery port to an isolated output port which generates a rectified sinusoid voltage. Then an unfoldi...

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Bibliographic Details
Main Authors: Zhijun Qian, Abdel-Rahman, Osama, Haibing Hu, Batarseh, Issa
Format: Conference Proceeding
Language:English
Subjects:
Batteries
Converters
DC-AC power conversion
Inverters
multi-port converters
Steady-state
Switches
three-port converters
Voltage control
Zero voltage switching
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Summary:This paper presents a novel concept of integrated three-port interface for stand-alone photovoltaic applications. The three-port topology interfaces one solar panel input port and one bi-directional battery port to an isolated output port which generates a rectified sinusoid voltage. Then an unfolding circuit can be adopted to generate an ac wave with very high efficiency because it is operated at very low frequency (50/60Hz). Therefore, this proposed structure uses only one switch-mode conversion stage to replace several independent converters and inverters in order to reduce component count and save the cost, making itself a valuable choice for low cost low power standalone PV system. The circuit operation and control architecture of the three-port interface are presented. It can achieve maximum power harvesting for the solar port, battery charge control for the battery port, while keeping a regulated rectified sinusoid output. The experiments of the three-port interface confirm the topology operation and its ability to achieve the multi-functional power management control.
ISSN:2329-3721
2329-3748
DOI:10.1109/ECCE.2010.5618252