A Direct Maximum Power Point Search Using Current-Voltage Based Power-Law Relation for Photovoltaic System under Uniform Irradiance

An output power of a photovoltaic source varies nonlinearly with atmospheric conditions. P&O and IC are most popular algorithms to track maximum power point of a PV module. In steady state operation, power oscillates around MPP due to its perturbing nature. To overcome this, researchers demonstrated direct MPP search algorithms. This paper proposes a direct MPP search algorithm using an I-V based power-law relation; this algorithm has not yet addressed in the literature. The simulation study is carried out for a 160 W polycrystalline silicon module PV system. Algorithm outperforms than the P&O under different irradiance and sudden load change.