Implementation of a MPPT Controller Based on AVR Mega16 for Photovoltaic Systems

The output power of photovoltaic(PV) array depends on solar irradiation levels and ambient temperature. To make full utilization of PV array output power, this paper develops a controller based on AVR Mega16 microcontroller in a PV power system. The controller is used to implement the proposed incremental conductance(IncCond) maximum power point tracking (MPPT) algorithm, which gives a pulse width modulation (PWM) to drive the boost DC/DC converter in the photovoltaic system, and force the photovoltaic module to operate at the maximum power point. The obtained simulation results demonstrate the performance of the proposed MPP-controller.