[IEEE 2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON 2012) - Phetchaburi, Thailand (2012.05.16-2012.05.18)] 2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology - Digital R-S-T controller for current loop control of DC/DC buck converter: A photovoltaic (PV) array simulator under partial shading condition