DMPPT experimental demonstration unit based on buck converter

Distributed Maximum Power Point Tracking (DMPPT) technique represents the most promising solution to enhance the lackluster energetic performance of the mismatched PhotoVoltaic (PV) systems. Despite that, there are several factors which restrict its performance some of which are still to be explored. To fully understand the advantages offered by the DMPPT solution, the implementation of a DMPPT emulator is necessary. Based on the above needs, this paper describes the realization and use of a DMPPT experimental demonstration unit based on the Buck DC/DC converter. The above device is capable to emulate the output current vs. voltage (I-V) characteristics of many commercial PV modules with a dedicated Buck DC/DC converter not only in controlled atmospheric conditions but also with different currents rating of the switching devices. The system implementation is based on a commercial power supply controlled by a low-cost Arduino board. Data acquisition is performed through a low-cost current and voltage sensor by using a multichannel board by National Instruments. Experimental results confirm the validity and potential of the proposed DMPPT emulator.