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http://dx.doi.org/10.5207/JIEIE.2014.36.1.036

A Study on High Efficiency for Grid-connected Modular Photovoltaic Power Conversion System  

Lee, Woo-Cheol (Hankyong National University Dept. of Electrical Electronic & Control Engineering, Institute for information technology convergence)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.28, no.1, 2014 , pp. 36-44 More about this Journal
Abstract
The conventional central photo voltaic inverters have several problems. First, shadow problem in each solar panel, and high DC voltage problem from each panel because of concentration to one central inverter. Therefore, module integrated inverter is proposed to solve these problems. The inverter should be small and cost effective. The cost and size in the inverter depend on the inductor. So the switching frequency should be increased to reduce the inductor and total size, but there is a problem in efficiency because of the losses in turn-on and turn-off. In the paper, the critical conduction mode(CRM) switching method is adopted to reduce the switching loss and interleaving method is proposed to increase the efficiency in Flyback converter. Finally, the validity of the proposed scheme is investigated with simulated and experimental results for a prototype system rated at 200W.
Keywords
Ocentral/Module Integrated Inverter; Flyback Converter; CRM(Critical Conduction Mode);
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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