Photovoltaic inverters with perturb & observe MPPT technique and one-cycle control

This work presents a novel 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 [8] 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 [8]. 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.