风力发电机组动态模型研究

该文针对基于双馈感应发电机的变速风力发电机组轴系的特点，用等效集中质量法和动力学方程建立了其包含机械传动链动态的轴系模型，与发电机动态方程组成8阶微分方程组。该8阶模型同时考虑了风力发电机组的机械和电气动态特性，弥补了现有各种模型过于简化的不足。并与不考虑机械动态的简化模型进行了仿真结果的对比。采用该模型可以更加有效地进行风力发电系统控制系统的设计，以及分析机组在各种运行工况下的动态行为。

A STUDY ON DYNAMIC MODEL OF WIND TURBINE GENERATOR SETS

The shaft system of variable speed wind turbine generator set based on doubly-fed induction generator is fully studied in this paper and is modeled with equivalent lump mass method and dynamic equations. Therefore, combined with the generator model, an 8-order model described by differential equations set is developed. Mechanical dynamic is taken into consider in this model as well as electrical dynamic, which makes up for the over simplifications of models in literatures. Simulation results are compared with those of simplified model. The presented model can be used to design the control system more effectively, and to analyze the dynamic of wind power generation systems.