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Transient performance improvement of wind turbines with doubly fed induction generators using nonlinear control strategy
, Article IEEE Transactions on Energy Conversion ; Volume 25, Issue 2 , 2010 , Pages 514-525 ; 08858969 (ISSN) ; Parniani, M ; Sharif University of Technology
2010
Abstract
This paper first discusses dynamic characteristics of wind turbines with doubly fed induction generator (DFIG). Rotor back electromotive force (EMF) voltages in DFIG reflect the effects of stator dynamics on rotor current dynamics, and have an important role on rotor inrush current during the generator voltage dip. Compensation of these voltages can improve DFIG ride-through capability and limit the rotor current transients. It is found that the electrical dynamics of the DFIG are in nonminimum phase for certain operating conditions. Also, it is shown that the dynamics of DFIG, under compensation of rotor back EMF and grid voltages, behave as a partially linearizable system containing...