A stability analysis for a maximum power point tracking (MPPT) scheme based on extremum-seeking control is developed for a photovoltaic (PV) array supplying a dc-to-dc switching converter. The global stability of the extremum-seeking algorithm is demonstrated by means of Lyapunov's approach. Subsequently, the algorithm is applied to an MPPT system based on the "perturb and observe" method. The steady-state behavior of the PV system with MPPT control is characterized by a stable oscillation around the maximum power point. The tracking algorithm leads the array coordinates to the maximum power point by increasing or decreasing linearly with time the array voltage. Off-line measurements are not required by the control law, which is implemented by means of an analog multiplier, standard operational amplifiers, a flip-flop circuit and a pulsewidth modulator. The effectiveness of the proposed MPPT scheme is demonstrated experimentally under different operating conditions.


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    Titel :

    MPPT of photovoltaic systems using extremum - seeking control


    Beteiligte:
    Leyva, R. (Autor:in) / Alonso, C. (Autor:in) / Queinnec, I. (Autor:in) / Cid-Pastor, A. (Autor:in) / Lagrange, D. (Autor:in) / Martinez-Salamero, L. (Autor:in)


    Erscheinungsdatum :

    2006-01-01


    Format / Umfang :

    1987407 byte




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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