MPPT scheme for small/large time partially shaded condition of a PV cell, array

In the recent years various algorithms have been proposed by researchers to extract the maximum power out of the solar cell/array, called maximum power point tracking (MPPT) algorithms. Out of these incremental conductance (INC) algorithm is most widely used due to its easy implementation and high accuracy. These algorithms also work for non ideal conditions such as long time partial shading condition (PSC). In this paper, a modified INC MPPT algorithm has been proposed, which also works to solve the problem of small time partial shading by comparing the previous and present duty ratios (D) of boost converter.