A comparative analysis of different control strategies applied to DFIG-based power systems

The connection of distributed generators in distribution systems of medium voltage and low voltage has been encouraged widely. Wind power generation in Brazil has been growing substantially in the last years. In this way, it is essential to investigate the dynamic behavior of this technology connected to the electrical grid. Among all power quality phenomenon, voltage sags are one of the main issues for the industry sector customers due to the damage caused to voltage sensitive devices largely employed in industrial applications. This paper aims to analyze the dynamic response of grid-connected doubly-fed induction generators subjected to an instantaneous voltage sag Type A, considering two rotor-side converter control topologies: Voltage Regulation and Reactive Power Regulation. The results will provide the reader a better comparative insight into the responses of these DFIG control topologies applied to a wind power system.