Operation of Grid Connected PV-Battery-Wind Driven DFIG Based System

This paper presents a PV-battery and wind driven doubly fed induction generator (DFIG) based grid connected system with an improved multi-functional control scheme for grid-side converter (GSC). A three-stage improved reduced-order multiple integrator (ROMI) control is used to maintain the reactive power into the grid as well as it regulates the DC-link voltage across the GSC. The grid side control improves power quality in different abnormal conditions. Moreover, it behaves such a way that it reduces the rise time, the maximum peak over-shoot as well as the settling time during the transients. The rotor side converter (RSC) is used to provide the required amount of reactive power using the field-oriented control, for the wind power generator (WPG). A DFIG is used as a WPG. The single-stage PV array and a battery with bi-directional converter are connected to the common DC-link of the GSC. The battery helps to extract the maximum wind power in light load conditions.

Index Terms— DFIG, Solar PV Generation, battery, power quality, MPPT, ROMI