Transient Stability Analysis during an Improved Coupling Procedure for an Induction Generator Based Wind Generation System to the Grid

• 作者: Amal Marrekchi Mohamed Ben Ali Kammoun Souhir Sallem Soulaymen Kammoun
• 来源期刊: 现代非线性理论与应用(英文)
• 学科: 医学
• 关键词: Wind Energy PITCH Control SQUIRREL CAGE Induction GENERATOR Transient Stability Soft STARTING
• 年，卷（期）: 2014,（3）
• 页码范围: 77-87
• 页数: 11页
• 分类号: R73

摘要

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.