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Journal of Energy in Southern Africa

On-line version ISSN 2413-3051
Print version ISSN 1021-447X


SHARMA, Dinesh K  and  PUROHIT, Ghanshyam. Differential power algorithm based maximum power point tracking for a standalone solar PV system. J. energy South. Afr. [online]. 2015, vol.26, n.2, pp.103-109. ISSN 2413-3051.

We report on an improved maximum power point tracking (MPPT) system based on a differential power algorithm. In the proposed algorithm, which is a modified form of a perturb and observe (P&O) algorithm, differential powers, as well as voltages at different time, are compared. The proposed algorithm has been implemented with a highly efficient boost converter, in which duty cycle of a switch is varied in such a way, that the power reaches a maximum at any instant of the day, irrespective of the environmental conditions. The improved MPPT is able to reduce the number of oscillations and tracking time significantly before reaching the maximum power point (MPP). The simulated I-V and P-V characteristic curves (individual and combined) of a solar PV module were generated in MATLAB.

Keywords : solar PV system; MPPT; efficiency; control algorithm; boost converter.

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