A non-isolated three-port converter for stand-alone renewable power system

A novel non-isolated three-port converter (NI-TPC) is proposed interfacing one PV port, one bidirectional battery port and one load port. Single stage power conversion between any two of the three ports is achieved. The topology is derived by decoupling the bidirectional power flow path of the conventional structure into two unidirectional ones. Two of the three ports can be tightly regulated to achieve maximum power harvesting for PV or charge control for battery, and maintain the load voltage constant at the same time, while the third port is left flexible to compensate the power imbalance of the converter. Operation states are analyzed. The multi-regulator competition control strategy is presented to achieve autonomous and smooth state switching when the PV input power fluctuates. The analysis is verified by the experimental results.

[1]  Haibing Hu,et al.  An integrated three-port inverter for stand-alone PV applications , 2010, 2010 IEEE Energy Conversion Congress and Exposition.

[2]  Robert Grino,et al.  Design, Construction, and Control of a Stand-Alone Energy-Conditioning System for PEM-Type Fuel Cells , 2010, IEEE Transactions on Power Electronics.

[3]  I. Batarseh,et al.  Modeling and Control of Three-Port DC/DC Converter Interface for Satellite Applications , 2010, IEEE Transactions on Power Electronics.

[4]  Kai Sun,et al.  A family of non-isolated three-port converters for stand-alone renewable power system , 2011, IECON 2011 - 37th Annual Conference of the IEEE Industrial Electronics Society.

[5]  N. Mohan,et al.  Three-Port Series-Resonant DC–DC Converter to Interface Renewable Energy Sources With Bidirectional Load and Energy Storage Ports , 2009, IEEE Transactions on Power Electronics.

[6]  Raja Ayyanar,et al.  Simple control design for a three-port DC-DC converter based PV system with energy storage , 2010, 2010 Twenty-Fifth Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[7]  Yaow-Ming Chen,et al.  Multi-input DC/DC converter based on the multiwinding transformer for renewable energy applications , 2002 .

[8]  Haibing Hu,et al.  A three-port Photovoltaic (PV) micro-inverter with power decoupling capability , 2011, 2011 Twenty-Sixth Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[9]  Gui-Jia Su,et al.  A Reduced-Part, Triple-Voltage DC–DC Converter for EV/HEV Power Management , 2009, IEEE Transactions on Power Electronics.

[10]  Issa Batarseh,et al.  Dynamic Analysis of Three-Port DC/DC Converter for Space Applications , 2009, 2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition.

[11]  J.W. Kolar,et al.  An Isolated Three-Port Bidirectional DC-DC Converter With Decoupled Power Flow Management , 2008, IEEE Transactions on Power Electronics.

[12]  Runruo Chen,et al.  A Family of Three-Port Half-Bridge Converters for a Stand-Alone Renewable Power System , 2011, IEEE Transactions on Power Electronics.

[13]  Runruo Chen,et al.  A three-port half-bridge converter with synchronous rectification for renewable energy application , 2011, 2011 IEEE Energy Conversion Congress and Exposition.

[14]  Fujio Kurokawa,et al.  Characteristics of the multiple-input DC-DC converter , 2004, IEEE Transactions on Industrial Electronics.

[15]  J.L. Duarte,et al.  Multiport converters for hybrid power sources , 2008, 2008 IEEE Power Electronics Specialists Conference.

[16]  Jorge L. Duarte,et al.  Family of multiport bidirectional DC¿DC converters , 2006 .

[17]  Issa Batarseh,et al.  An Integrated Four-Port DC/DC Converter for Renewable Energy Applications , 2010, IEEE Transactions on Power Electronics.

[18]  M. Marchesoni,et al.  New DC–DC Converter for Energy Storage System Interfacing in Fuel Cell Hybrid Electric Vehicles , 2007, IEEE Transactions on Power Electronics.

[19]  M.G. Simoes,et al.  Three-Port Bidirectional Converter for Hybrid Fuel Cell Systems , 2007, IEEE Transactions on Power Electronics.