Coordinated Frequency Controller Operation for DFIG based Wind Turbine Generator Control using Combination Selection Scheme

There is a substantial increase in the use of doubly fed induction generator (DFIG) based wind turbine in determining the frequency response. The frequency regulation capability of the DFIG has contributed to enhancing the system response at the time of frequency variations. The authors have proposed the coordinated frequency controller to achieve the following objectives: first to provide the transitory support to the system at the time of frequency event and second to maintain the deloading capability of the DFIG system depending on the wind speed and the deloading mechanism limitations. Further, the combination selection scheme based on the weighing factor is introduced that provides an apt strategy to manage various control scheme at the time of varying reserve power depending on wind power availability. The real-time digital simulator platform provides the simulation results that showcase the effectiveness of the proposed scheme in obtaining the frequency regulation with the help of the DFIG system.