An MPPT Controller Design for Photovoltaic (PV) Systems Based on the Optimal Voltage Factor Tracking

Achieving the maximum power is the major and important task in the PV applications. Many of maximum power point tracking, MPPT, methods are developed based on optimal voltage or current factors, which are assumed to be constant. In this paper, a PV system is modeled such that variations of the optimal voltage factor over the environmental conditions are highlighted. An adaptive cascade MPPT controller is proposed to follow the optimal voltage factor in each insolation level, in addition to regulating the output power at its maximum possible value via a boost converter. Simulations are performed to verify the validation of the proposed MPPT system.