Hybrid Renewable Energy System with Wind Turbine and PV Panels

Doubly fed induction generators used in wind energy applications require a source and power converter system to feed variable frequency ac voltage to its rotor. The paper presents a hybrid system in which the rotor power can be drawn either from three-phase ac mains or a photovoltaic (PV) panel-battery combination. While drawing power from ac mains, an ac-dc converter with soft switching and power factor correction is used. While supplying rotor injection power from PV panels, one of the MOSFET switches of the ac-dc converter will be used for boosting the PV panel output. The results obtained on an experimental converter are presented.