Nonlinear adaptive control for MPPT in photovoltaic systems

International audienceWe are considering the problem of maximum power point tracking (MPPT) in photovoltaic (PV) arrays. The PV power transferred to the battery through a controlled a PWM Boost power converter. As the maximum power point (MPP) of PV generators varies with solar radiation and temperature, an adaptive controller is proposed. The latter is designed using a backstepping technique, based on a nonlinear model describing the dynamics of the boost converter, the PV arrays and the battery. It is formally shown under mild assumptions that the developed adaptive controller actually meets the maximum power point tracking requirement