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A Distributed Maximum Power Point Control For Efficiency Enhancement Of Photovoltaic System

Mrs. Sunita Ravi Kadali, Prof Mrs. V.S. Jape

Minimum element in the manufacturing of photovoltaic (PV) systems is the PV module. For most applications, it becomes necessary to group PV modules until the desired current and voltage levels are achieved.There may be variations in electric characteristics of PV modules due to manufacturing processes, differences in the orientations and inclinations of solar surfaces, temperature-effects, aging-related parametric drift and so forth. Because of mismatching, PV systems show additional losses.These additional losses are caused mainly due to the fault of Maximum Power Point Tracking (MPPT) of individual modules in presence of mismatching operating conditions. If a module becomes partially shaded by buildings or trees then module’s output is limited by the cell with the lowest output. The resulting loss of power is referred to as mismatch loss. They can be decreased by a DC-DC converter dedicated to each module is inserted, and each converter performs its own MPPT operation. This process is called Distributed MPPT (DMPPT).To proposed distributed MPPT control Mat-lab Simulink model of CMPPT and DMPPT run for various irradiance condition along with various value of resistances.This paper presents advantages of DMMPT in Mat-lab simulation over centralized MPPT. It is a low-cost high-efficiency dc–dc converter with maximum power point tracking (MPPT) functions & control.