异步风电系统的小干扰稳定性研究

Research on the Small Signal Stability in AWTG-Asynchronous Wind Turbine Generator

对异步风电机组(AWTG-Asynchronous Wind Turbine Generator)进行理论分析,列出AWTG的状态方程,包括风机模型、轴系模型和发电机模型。从数学模型及状态方程出发,利用电力系统小干扰稳定分析方法,对异步风电机组静态稳定性进行理论分析。在电力系统分析软件中对风电机组与无穷大电源组成简单系统进行仿真分析。理论分析与仿真结果表明,异步风电机组静态稳定性与异步发电机运行条件、风机惯量以及风电机组轴系参数密切相关,揭示了异步风电机组静态稳定的变化规律。

The paper analyzes the wind turbine with asynchronous generator theoretically,lists its state equations,including the wind turbine model,the pitch control system model,the shaft model and the generator model.The paper also presents the impact on the asynchronous wind turbine generators steady-state stability of correlative parameter by the ROUTH array of the linear state equations.The simple power system models which include asynchronous wind turbine generators and an infinite bus are established in DIgSILENT/Power Factory.The analysis develops insights into the eigenvalues of the case of asynchronous wind turbine generators connected to an infinite bus by regulating the parameters of the wind turbine generators,and the steady-state stability limits are calculated in different performance conditions.Thereby the law and mechanism of the asynchronous wind turbine generators steady-state stability are revealed in the paper.