L. Egiziano, N. Femia, D. Granozio, G. Petrone, G. Spagnuolo, and M. Vitelli (Italy)
mppt, perturbe and observe.
In this paper the perturb and observe best operation
conditions are investigated in order to identify the edge
efficiency performances of this most popular maximum
power point tracking technique for photovoltaic
applications. It is shown that perturb and observe may
guarantee top-level efficiency, provided that a proper
predictive and adaptive hill climbing strategy is adopted.
The approach proposed in this paper is aimed at realizing,
in addition to absolute best tracking performances, high
robustness and promptness both in sunny and cloudy
weather conditions. The power gain with respect to
standard perturb and observe technique is proved by
means of simulation results and experimental
measurements performed on a low power system. Besides
the performance improvements, it is shown that the
proposed approach allows possible reduction of hardware
costs of analog-to-digital converters used in the maximum
power point tracking control circuitry.