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http://dx.doi.org/10.6113/JPE.2015.15.5.1318

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

Manoharan, Mohana Sundar (Department of Electrical Engineering, Soongsil University)
Ahmed, Ashraf (Department of Electrical Engineering, Soongsil University)
Seo, Jung-Won (Department of Electrical Engineering, Soongsil University)
Park, Joung-Hu (Department of Electrical Engineering, Soongsil University)
Publication Information
Journal of Power Electronics / v.15, no.5, 2015 , pp. 1318-1328 More about this Journal
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 DC-Link 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.
Keywords
Micro-inverter; Multi-level inverter; Multi-output flyback converter; Total harmonic distortion;
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Times Cited By KSCI : 4  (Citation Analysis)
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