Power Conditioning for a Small-Scale PV System with Charge-Balancing Integrated Micro-Inverter

Mohana Sundar Manoharan; Ashraf Ahmed; Jung-Won Seo; Joung-Hu Park

Power Conditioning for a Small-Scale PV System with Charge-Balancing Integrated Micro-Inverter

Mohana Sundar Manoharan

Ashraf Ahmed

Jung-Won Seo

Joung-Hu Park

Vol. 15, No. 5, pp. 1318-1328, Sep. 2015

10.6113/JPE.2015.15.5.1318

Micro-inverter

Multi-level inverter

Multi-output flyback converter

Total harmonic distortion

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Abstract

The photovoltaic (PV) power conditioning system for small-scale applications has gained significant interest in the past few decades. However, the standalone mode of operation has been rarely approached. This paper presents a two-stage multi-level micro-inverter topology that considers the different operation modes. A multi-output flyback converter provides both the DCLink voltage balancing for the multi-level inverter side and maximum power point tracking control in grid connection mode in the PV stage. A modified H-bridge multi-level inverter topology is included for the AC output stage. The multi-level inverter lowers the total harmonic distortion and overall ratings of the power semiconductor switches. The proposed micro-inverter topology can help to decrease the size and cost of the PV system. Transient analysis and controller design of this micro-inverter have been proposed for stand-alone and grid-connected modes. Finally, the system performance was verified using a 120 W hardware prototype.

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Cite this article

[IEEE Style]

M. S. Manoharan, A. Ahmed, J. Seo, J. Park, "Power Conditioning for a Small-Scale PV System with Charge-Balancing Integrated Micro-Inverter," Journal of Power Electronics, vol. 15, no. 5, pp. 1318-1328, 2015. DOI: 10.6113/JPE.2015.15.5.1318.

[ACM Style]

Mohana Sundar Manoharan, Ashraf Ahmed, Jung-Won Seo, and Joung-Hu Park. 2015. Power Conditioning for a Small-Scale PV System with Charge-Balancing Integrated Micro-Inverter. Journal of Power Electronics, 15, 5, (2015), 1318-1328. DOI: 10.6113/JPE.2015.15.5.1318.