Control of a Three-Phase Cascaded H-Bridge Multilevel Inverter for Stand-alone PV System

This paper presents a three-phase cascaded H-bridge converter for a stand-alone photovoltaic (PV) application. The multilevel topology consists of several H-bridge cells connected in series, each one connected to a string of PV modules. The adopted control scheme permits the independent control of each dc-link voltage, enabling, in this way, the tracking of the maximum power point for each string of PV panels. Additionally, low ripple sinusoidal-current waveforms are generated with almost unity power factor. The topology offers other advantages such as the operation at lower switching frequency or lower current ripple compared to standard two-level topologies. Simulation and experimental results are presented for different operating conditions.

[1]  Johann W. Kolar,et al.  A novel multicell DC-AC converter for applications in renewable energy systems , 2002, IEEE Trans. Ind. Electron..

[2]  Pablo Correa,et al.  Control of a Single-Phase Cascaded H-Bridge Multilevel Inverter for Grid-Connected Photovoltaic Systems , 2009, IEEE Transactions on Industrial Electronics.

[3]  Fang Zheng Peng,et al.  Multilevel inverters: a survey of topologies, controls, and applications , 2002, IEEE Trans. Ind. Electron..

[4]  P. Jain,et al.  The Application of the Cascaded Multilevel Converters in Grid Connected Photovoltaic Systems , 2007, 2007 IEEE Canada Electrical Power Conference.

[5]  Vassilios G. Agelidis,et al.  Multilevel converters for single-phase grid connected photovoltaic systems-an overview , 1998, IEEE International Symposium on Industrial Electronics. Proceedings. ISIE'98 (Cat. No.98TH8357).

[6]  L.M. Tolbert,et al.  Fundamental frequency modulated multilevel inverter for three-phase stand-alone photovoltaic application , 2008, 2008 Twenty-Third Annual IEEE Applied Power Electronics Conference and Exposition.

[7]  E. Gubia,et al.  Cascaded H-bridge multilevel converter for grid connected photovoltaic generators with independent maximum power point tracking of each solar array , 2003, IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03..

[8]  B.-R. Lin,et al.  New multilevel rectifier based on series connection of H-bridge cell , 2000 .

[9]  Joan Rocabert,et al.  Multilevel Diode-Clamped Converter for Photovoltaic Generators With Independent Voltage Control of Each Solar Array , 2008, IEEE Transactions on Industrial Electronics.

[10]  F. Blaabjerg,et al.  A review of single-phase grid-connected inverters for photovoltaic modules , 2005, IEEE Transactions on Industry Applications.

[11]  Fernando L. M. Antunes,et al.  Multilevel Inverter Topologies for Stand-Alone PV Systems , 2013, IEEE Transactions on Industrial Electronics.

[12]  Karsten P. Ulland,et al.  Vii. References , 2022 .

[13]  D. Biel,et al.  Energy-Sampled Data Modeling of a Cascade H-Bridge Multilevel Converter for Grid-connected PV Systems , 2006, 2006 IEEE International Power Electronics Congress.

[14]  A. Bakhshai,et al.  A Novel topology and control strategy for maximum power point trackers and multi-string grid-connected PV inverters , 2008, 2008 Twenty-Third Annual IEEE Applied Power Electronics Conference and Exposition.

[15]  Pablo Correa,et al.  A Predictive Torque Control for Inverter-fed Induction Machines , 2007, 2005 IEEE 36th Power Electronics Specialists Conference.