Global Maximum Power Point Tracking of Photovoltaic Array under Partial Shaded Conditions

Photovoltaic power generation systems have infinite energy resources and are environment friendly technology. But low efficiency and high cost per unit output power is the biggest problem of these systems. Accommodation of PV panels in the roof top creates a practical constraint of “partially shaded condition” or “Non uniformly illuminated array condition”. The power-voltage characteristic of photovoltaic arrays operating under partial shading conditions exhibits multiple local maximum power points due to the usage of bypass diodes