A phase-shifted carrier-based PWM technique for cascaded h-bridge inverters application in standalone PV system

A phase-shifted carrier-based pulse width modulation strategy of two single-phase cascaded H-bridge inverters with separated solar photovoltaic sources, for standalone applications, is proposed in this paper. These functions are derived from a conventional unipolar modulation method with two phase-shifted triangular carrier waves, which can be easily implemented. The modulation strategy was developed to provide a five-level output waveform with a non unity power factor load. The possibility of the proposed technique has been verified though computer simulations and experimental results.

[1]  Vassilios G. Agelidis,et al.  A multilevel PWM inverter topology for photovoltaic applications , 1997, ISIE '97 Proceeding of the IEEE International Symposium on Industrial Electronics.

[2]  Holmes,et al.  Pulse width modulation for power converters , 2003 .

[3]  Jeyraj Selvaraj,et al.  Multilevel Inverter For Grid-Connected PV System Employing Digital PI Controller , 2009, IEEE Transactions on Industrial Electronics.

[4]  Pablo Lezana,et al.  Hybrid Multicell Converter: Topology and Modulation , 2011, IEEE Transactions on Industrial Electronics.

[5]  Pierluigi Siano,et al.  A Multilevel Inverter for Photovoltaic Systems With Fuzzy Logic Control , 2010, IEEE Transactions on Industrial Electronics.

[6]  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).

[7]  T. Habetler,et al.  Novel Multilevel Inverter Carrier-Based PWM Method , 2000 .

[8]  M. Chithra,et al.  Analysis of cascaded H bridge multilevel inverters with photovoltaic arrays , 2011, 2011 International Conference on Emerging Trends in Electrical and Computer Technology.

[9]  D.G. Holmes,et al.  Opportunities for harmonic cancellation with carrier based PWM for two-level and multi-level cascaded inverters , 1999, Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370).

[10]  L.M. Tolbert,et al.  Novel multilevel inverter carrier-based PWM methods , 1998, Conference Record of 1998 IEEE Industry Applications Conference. Thirty-Third IAS Annual Meeting (Cat. No.98CH36242).

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