Energy-balance and sliding mode control strategies of a cascade H-bridge multilevel converter for grid-connected PV systems

This work presents the design of a sliding-mode based current controller for a Cascade Full Bridge Multilevel Inverter grid connected PV system. The design also includes a modulation strategy to share the control action among the cascade-connected bridges in order to concurrently synthesize a multilevel waveform and to keep each of the PVG at its maximum operating point. Experimental results are included to validate the proposed approach.

[1]  Tsutomu Hoshino,et al.  Maximum photovoltaic power tracking: an algorithm for rapidly changing atmospheric conditions , 1995 .

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

[3]  Francesc Guinjoan,et al.  Energy-Balance Modeling and Discrete Control for Single-Phase Grid-Connected PV Central Inverters , 2008, IEEE Transactions on Industrial Electronics.

[4]  M. Veerachary,et al.  Reliability Issues in Photovoltaic Power Processing Systems , 2008, IEEE Transactions on Industrial Electronics.

[5]  Francesc Guinjoan,et al.  Sliding-mode control design of a boost-buck switching converter for AC signal generation , 2004, IEEE Transactions on Circuits and Systems I: Regular Papers.

[6]  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.

[7]  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).

[8]  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..

[9]  Vassilios G. Agelidis,et al.  Multilevel converters for single-phase grid connected photovoltaic systems: an overview , 1999 .

[10]  Vassilios G. Agelidis,et al.  Inverters for single-phase grid connected photovoltaic systems-an overview , 2002, 2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289).