Universitá Degli Studi Di Salerno

Power-one Italy S.p.a.

Abb Technology Ag

Nicola Femia

Sauro Macerini

Giovanni Spagnuolo

Massimo Vitelli

Luigi Egiziano

Giovanni Petrone

Danio Nocentini

Giovanni Pertrone

Domenico Granozio

Filippo De Rosa

Antonio Sirianni

Olga Sacco

Walter Zamboni

Dionisio Pilerci

Controller apparatus with MPPT tracking for controlling an electric power generation system comprising two identical sub-sections of a photovoltaic field, connected to two respective identical switching power converters, the two converters being controlled by two respective periodic controlling signals and the outputs of the two converters being connected in parallel. The controller apparatus comprises a first and a second current sensor for detecting the output currents of the two converters, a subtractor capable to receive the two current detection signals and to generate a difference signal, an amplifier capable to amplify the difference signal by a constant gain k, and a low-pass filter capable to filter the amplified difference signal, a proportional-integral controller for controlling the filtered amplified difference signal.

Controller apparatus with maximum power point tracking for controlling an electric power generation system based on photovoltaic sources, controlling method and related electric power generation system

The present invention concerns a single stage inverter device for power converters, comprising switching means (M-M) capable to periodically connect an energy source, in particular a photovoltaic one, to an electric network or grid, the switching means (M-M) being controlled by controlling electronic means operating according to a single switching cycle control of the switching means (M-M), the operative and circuit device parameters being such to fulfill a series of constraints simultaneously optimizing both the maximum power point tracking or MPPT (Maximum Power Point Tracking) and the output power factor or PF-out (Power Factor-output) for one or more operation conditions. The present invention further concerns the related method of controlling and the related method of scaling such device.

Single stage inverter device, and related controlling method, for converters of power from energy sources, in particular photovoltaic sources

Described herein is a system for generating electric power, comprising: an electric-power source () having a preferential point of operation; a double-stage inverter (A,B), which transfers the energy from said source to an external a.c.-voltage electrical network (); a block () for identification of the preferential point of operation, which supplies a reference signal according to the conditions of operation of the electric-power source and to the preferential point of operation of said source; a corrector block (), provided for setting the parameter for control of the boost converter (A) of the double-stage inverter (A,B) as a function of the reference signal and of a signal of actual operation of said electric-power source, and for maintaining the source in the proximity of the preferential point of operation.

System for producing electric power from renewable sources and a control method thereof

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Baronissi, Italy

Nicola Femia