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.
Highlights
There has been a world-wide interest in wind energy since it is becoming the world’s fastest growing energy source with an average growth over the past 7 years of 26% and a 12% foreseeable penetration of global electricity demand by 2020 [1].How to cite this paper: Kammoun, S., Marrekchi, A., Sallem, S. and Kammoun, M.B.A. (2014) Transient Stability Analysis during an Improved Coupling Procedure for an Induction Generator Based Wind Generation System to the Grid
Several wind turbine generator (WTG) concepts have been developed during the last years
In order to improve transient stability of the wind generation system by avoiding inrush currents, we propose to verify two specific conditions before connecting to the grid:
Summary
There has been a world-wide interest in wind energy since it is becoming the world’s fastest growing energy source with an average growth over the past 7 years of 26% and a 12% foreseeable penetration of global electricity demand by 2020 [1].How to cite this paper: Kammoun, S., Marrekchi, A., Sallem, S. and Kammoun, M.B.A. (2014) Transient Stability Analysis during an Improved Coupling Procedure for an Induction Generator Based Wind Generation System to the Grid. There has been a world-wide interest in wind energy since it is becoming the world’s fastest growing energy source with an average growth over the past 7 years of 26% and a 12% foreseeable penetration of global electricity demand by 2020 [1]. (2014) Transient Stability Analysis during an Improved Coupling Procedure for an Induction Generator Based Wind Generation System to the Grid. Several wind turbine generator (WTG) concepts have been developed during the last years. The main purpose of research on these concepts has been especially about maximizing energy capture, minimizing cost, and improving energy produced quality [2]-[6]. Among these various concepts, the squirrel cage induction generator (SCIG) based WTG.
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