10MW变速直驱型风力发电机组的建模及Matlab仿真

摘要

This paper establishes a 10 MW variable speed direct-driven wind turbines model that is per unit standard Matlab model. The model contains three components, that is wind speed model, power conversion model, and drive chain model. The blades, blades hub, shaft constitute a sub-module and rotor form another sub-module in the drive chain model. Through the per unit standard conversion and flexible parameter adjustment, the model can accurately simulate a variety of variable speed direct driven wind turbines. Simulation results show that the resistance magnetic moment of electrical load can dynamically adjust the rotor speed, thereby achieving the wind maximum power tracking in the case of low-speed wind and that the wind turbine pitch angle can control the utilization of high-speed winds and effectively prevent capacity of mechanical and electrical load from overloading in the wind power system. On researching the transient performance and grid control technology of variable speed direct driven wind turbines in large-scale electric power grid with wind power system, the model is of more important significance.This work is supported by Scientific Research Fund of Hunan Provincial Education Department (No. 1OCO355).%构建了一个包含风速模型、功率转换模型、传动链模型等三个部分的10MW变速直驱型风力发电机组的标么值的Matlab模型.传动链模型是基于二质量块——轴数学模型所构建的动态模型.通过标么值的转换及灵活的参数调整,该模型能较准确地模拟各种变速直驱型风力发电机组.仿真分析获取了最大功率跟踪特性曲线,并得到了风力发电机组的四个工作区.结果还能表明,电负荷电磁阻力矩能动态地调整电机转子转速,从而在低速风时能实现风能最大功率的追踪.同时,风涡轮的桨距角能控制高速风的利用率,使风涡轮机工作在额定功率下,有效地防止整个风力发电系统的机械和电负荷容量的过载冲击.作为原动力模型,该模型有助于进一步研究变速直驱风力发电系统的功率特性和并网发电控制技术.