风力发电分析研究 电气工程专业

摘 要近年来风力发电机数量不断增多，探究风力发电变流器的响应性能也愈趋迫切。论文主要目的是探究 1.5MW 风力发电系统的响应性能，分析变流系统的数学模型并确定相应的控制策略，为风力发电系统的设计提供参考。在永磁同步风力发电系统的理论基础上，利用仿真软件 Matlab/Simulink 建模得到风能利用系数和功率及转速曲线，并分析曲线中各量变化对系统的影响。同时建立 PMSG 的数学模型。通过对机侧和网侧变流器数学模型的分析，探究了其两侧变流器的控制方法，建立电机侧控制器模型以及网侧控制器模型。最后对永磁风力发电系统进行性能分析，分析表明直流母线电压和逆变器侧电流对系统影响较大。进一步建立 1.5MW 直驱永磁同步风力发电系统模型。就风速跳变对发电系统进行仿真，各量的仿真波形表明所采用的控制方法符合系统运行特性，所建立的模型同样符合系统要求。关键词: 变流器；并网运行；Matlab；建模AbstractWith the increasing number of wind turbines in recent years, the response performance of wind power converters is becoming more and more urgent. The main purpose of this paper is to explore the response performance of 1.5MW wind power generation system, analyze the mathematical model of the variable flow system and determine the corresponding control strategy, which provides reference for the design of wind power generation system.Based on the theory of permanent magnet synchronous wind power generation system, the wind energy utilization coefficient, power and rotational speed curve are obtained by using simulation software Matlab/simulink, and the influence of each quantity change in the curve on the system is analyzed. The mathematical model of PMSG is also established. Through the analysis of the mathematical model of the machine side and the network side converter, the control methods of the two sides of the converter are explored, and the model of the motor side controller and the network side controller is established. Finally, the performan...