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Photovoltaic inverters with Perturb&Observe MPPT technique and one-cycle control

This work presents a single-stage photovoltaic inverter which is based on one-cycle control. Such an inverter is characterized by two original features. The first one lies in a new formulation of the set of equations for the design of the one-cycle control circuitry of the inverter, such constraints are explained in L. Egiziano et al. (2006) and are here used to select the optimal solution. The second original characteristic of the proposed inverter lies in the development of a Perturb&Observe maximum power point tracking technique customized for a one cycle controlled single-stage inverter (patent pending) based on a sub set of the constraints reported in L. Egiziano et al. (2006). The results obtained show that the performances of the proposed system are top level and that the proposed solution represents the first true single stage photovoltaic inverter