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Study and evaluation of load current based MPPT control for PV solar systems

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2 Author(s)
Yuncong Jiang ; Dept. of Electr. & Comput. Eng., Univ. of Alabama, Tuscaloosa, AL, USA ; Abu Qahouq, J.A.

Because the power from Photovoltaic (PV) solar arrays depends on the array operating and surrounding conditions, it is beneficial to implement a maximum power point tracking (MPPT) technique to enlarge the amount of output power. There are several MPPT concepts and algorithms presented in the literature. This paper evaluates a load/output current based MPPT (LOC-MPPT) technique using P&O algorithm which requires the load current sensing only as the control variable. The LOC-MPPT technique is experimentally evaluated in this paper with different perturbation step sizes using a PV solar system prototype. The effect of the perturbation step size value on controller speed and accuracy is experimentally analyzed.

Published in:

Energy Conversion Congress and Exposition (ECCE), 2011 IEEE

Date of Conference:

17-22 Sept. 2011