Peak Power Extraction from a PV System for Various DC and AC Loads

This paper describes the MPP determination of a photovoltaic (PV) panel using the explicit equation of current, which is only a function of voltage. Using an approximation of a straight line expression, the explicit equation of current is derived from implicit V-I characteristics. The V-I curves obtained from an implicit expression of current for various panel ratings are used to implement the proposed PV system expression of current. Under various environmental conditions (DEC), the proposed explicit V-I expression is used to directly estimate the MPP of a PV system. Using the MATLAB program, the MPP of the panel at DEC obtained by applying the proposed algorithm is contrasted with various existing techniques. The estimated MPP of a panel using the developed method closely matches the actual MPP values, according to the results. Additionally, there is little (%) error between estimated peak power using the developed method and measured peak power. As a result, a panel's estimated MPP calculated using the developed method is more precise.