Limiting the power generated by a photovoltaic system

Although photovoltaic (PV) systems are generally based on Maximum Power Point Tracking (MPPT), many situations such as stand-alone systems or microgrids increasingly require the PV system to operate below maximum power. The problem here is that the power regulation becomes unstable when the MPP power is lower than the reference power as a result of a decrease in irradiance. This paper proposes a control strategy for a DC/DC boost converter that makes it possible to operate in both modes: at either maximum or limited power point tracking. Simulation results validate the control, showing high dynamics and confirming that the system stability is guaranteed for any situation.