This examples places the MPPT controller closing the loop for a voltage source connected to a PV array. The MPPT controller senses the power coming out of the PV array and provides a setpoint for the voltage source. This changes the operation point of the PV array with the goal of maximizing its output power for any given solar irradiation and junction temperature conditions.
The model is designed to challenge the control by ramping solar irradiation, temperature at different times and by injecting a perturbation into the control loop. The MPPT controller successfully deals with these changing conditions as shown in the following plot: