双馈式风力发电系统的机电暂态建模与运行分析

为了准确分析双馈式风力发电系统及其在电网中的运行特性，建立了该系统的机电暂态模型。应用机理建模方法建立了风力机、机械转动装置和双馈异步发电机等双馈式风力发电系统各组件的数学模型和桨距角控制模型。基于电磁暂态模型结合机电运行特性建立了转子侧和网侧的变流器控制系统模型。在此基础上，在PSASP7.0建模系统中构建了完整的双馈式风力发电系统的UD模型。将该UD模型应用于含双馈式风力发电的单机无穷大系统中，对风速变化和电网故障等情形进行了仿真分析，结果表明所建模型能正确反映系统的机电暂态特性和运行特性。

Modeling and operation simulation of doubly-fed type wind power generation system electromechanical transient model

For analyzing doubly-fed wind power generation system and its operation characteristics in power grid accurately, its electromechanical transient models are developed. The mathematical model and pitch angle control model are established for components of doubly-fed wind power generation system including the wind turbine, mechanical device and doubly-fed induction generator. Based on its electrical-magnetic model, the models of converters control system of rotor and network sides are obtained, considering electromechanical operation characteristics. On this basis, the user defined (UD) models of doubly-fed wind power generation system in PSASP are constructed. The UD models are applied in the single machine infinite bus system for simulation. The results show that the models developed can reflect the transient characteristics of the system.