PLL-Less Current Controller for Grid-Connected Photovoltaic Systems

CLAUDIO A. BUSADA; SEBASTIAN GOMEZ JORGE; ANDRES E. LEON; JORGE A. SOLSONA

Congreso; XIV Reunión de Trabajo en Procesamiento de la Información y Control, RPIC; 2011

A current controller suitable for three-phase photovoltaic systems is presented. The proposed controller ensures the injection of sinusoidal and balanced currents, with high immunity to both imbalances and harmonics present in the supply voltage, without using a PLL to synthesize the reference currents to be injected. A fully digital domain controller design is proposed, that takes into account the DSP processing delay as part of the system tostabilize.