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International Journal of Photoenergy
Volume 2016 (2016), Article ID 7134904, 6 pages
Research Article

Design and Experimental Results of Battery Charging System for Microgrid System

Division of Electrical, Electronics and Control Engineering, Kongju National University, Chungcheongnam-do, Republic of Korea

Received 26 July 2016; Accepted 11 October 2016

Academic Editor: Santolo Meo

Copyright © 2016 Byunggyu Yu. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Nowadays, many countries have paid attention to renewable energy due to fossil fuel crisis and its related environmental pollution. In particular, following the government supply business for renewable energy industry, the private sectors drive the stable power supply by using renewable sources for both microgrid system and standalone application. Battery charging and discharging control system of microgrid system are critical to extend lifetime of standalone photovoltaic system. Corresponding to this demand, this paper presents the development of battery charging and discharging system based on battery modeling, SOC (state of charge) estimation, and its implementation for 5 kW. As a result, the conversion efficiency shows 96.35% with over 95% charging performance.