异步风力发电系统动态稳定性分析的数学模型及其应用

分析了异步风力发电系统的特点，介绍该系统各部分模型的结构，根据风速变化的异步风力发电系统动态稳定性分析的需要，建立了在一定程度上反映风电场实际风速变化的风速时空模型。由于风力机与发电机的柔性连接，使得风力机动态数学模型大为简化，取适当的惯性时间常数，风力机可用一阶惯性环节表示。

APPLICATION OF MODELS OF THE WIND TURBINE INDUCTION GENERATORS (WTIGs) TO WIND POWER SYSTEM DYNAMIC STABILITY ANALYSIS

This paper analyzed the characteristics of wind turbine induction generators (WTIGs). and introduced their configuration, respectively. According to distribution law of the wind speed in the wind farm and necessary of the WTIGs dynamic stability analysis, established the space and time models of wind speed which could reflect the actual wind distribution to a certain degree. The wind turbine model was modified simply because of the flexible connection between wind turbine and induction generator. The wind turbine could be described by one order inertia transfer function when took a right inertia time constant. The induction generator stator voltage and rotor electromagnetic transient equations have been transformed into synchronous coordinate, and implemented the WTIGs models incorporated to the conventional electric power system mid term dynamic stability simulation program. Making use of the models in this paper, can analyze the dynamics of wind turbine generators connected to the electric power system. Further, the limit of penetration power which wind farms inject into the network can be calculated. At last, two actual wind farms proved the value of theory and practicability of the models in this paper.