TITLE:
Transient Stability Analysis during an Improved Coupling Procedure for an Induction Generator Based Wind Generation System to the Grid
AUTHORS:
Soulaymen Kammoun, Amal Marrekchi, Souhir Sallem, Mohamed Ben Ali Kammoun
KEYWORDS:
Wind Energy, Pitch Control, Squirrel Cage Induction Generator, Transient Stability, Soft Starting
JOURNAL NAME:
International Journal of Modern Nonlinear Theory and Application,
Vol.3 No.3,
July
14,
2014
ABSTRACT: For fixed speed wind turbines, the connection of its squirrel cage
induction generator (SCIG) to the grid leads to inrush current which can reach
an average of 2 p.u. up to 2.5 p.u. in higher wind speed even by using a soft
starter. We propose in this paper a new soft starting of squirrel cage
induction generator based wind turbine connected to the grid. Our strategy
overcomes such transient instability problems and pinpoints rapidly synchronous
speed regardless the wind speed acting on pitch angle. The proposed strategy
ensures at least 50% reduction of inrush current and 18% gain of WTG starting
time. A state model of the system is given including the wind turbine model and
the SCIG model in the synchronous reference frame. Simulation results are
analysed and compared to the classic coupling procedure.