Abstract
AbstractIn the past few years, major increase in the exploitation and development of wind energy-based renewable energy systems have occurred. In wind energy systems, the power whether active or reactive coming from a wind turbine needs to be controlled and a doubly fed induction generator (DFIG) provides a viable solution for its control. DFIG is an induction machine with variable velocity having the stator connected to the grid directly and connection of the rotor with the grid is through back-to-back power electronics converters. In this paper, complete analysis and control strategy of DFIG is presented. The control strategy used is field-oriented vector control (VC) inspired from vector control of dc drives. VC makes independent control of torque and speed of a DFIG possible and hence giving the freedom to control the power of a DFIG-based wind energy system. The modelling and analysis of field-oriented VC DFIG is done in MATLAB/Simulink. From the analysis, it is found that by tuning the PI controller parameters properly, it is possible to control the speed and torque of DFIG independently.KeywordsWind energyDoubly fed induction generator (DFIG)Vector control (VC)Simulation
Published Version
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