PV power tracking through utility connected single-stage inverter

A three-loop control scheme for the PV supplied single stage inverter is proposed in this paper. Integrating the tracking algorithm together with hysteresis control technique evolves this scheme. The feed-forward loop performs the maximum power extraction, while the remaining two inner-loops maintains unity power factor operation of the inverter. To study the effectiveness of the proposed control scheme simulation models are developed in PSIM platform, which includes photovoltaic source realization, control scheme and utility system. The concept is demonstrated through simulation results.