定速异步机型风电场机网扭振建模及仿真  

Modeling and Simulation of Shaft Torsional Vibration in Wind Farm Composed of Fixed Speed Inductive Generators

作　　者：杨敏霞[1] 解大[1] 娄宇成[1] 冯俊淇[1] 贾玉健[1] 王西田[1] 

机构地区：[1]上海交通大学电子信息与电气工程学院,上海市闵行区200240

出　　处：《电网技术》2014年第9期2422-2428,共7页Power System Technology

基　　金：国家自然科学基金项目(51277119)~~

摘　　要：以定速异步风电机组为例,建立包括三质量块轴系数学模型在内的风机模型,在此基础上建立了定速异步机型风电场多机小扰动仿真模型,研究该机型下同型风电场扭振模态及其相关因子,并对比不同风机数量及布局的风电场扭振模态。结果显示,风电场机组间轴系扭振模态出现双谐振尖峰现象,风机数量增加将导致扭振模态特征值实部趋于正半轴并且阻尼比降低;风电场机组间存在扭振传递作用,风电场风机数量和布局将影响系统的小干扰稳定性。Taking fixed speed induction generator （FSIG） unit for example, a wind turbine model including three mass equivalent model of shafting system is established. On this basis a small signal simulation model for wind farm composed of FSIGs is built to research the torsional vibration pattern occurred in homotype wind farm and its correlation factor, and the torsional vibration patterns of wind farms with different layouts and numbers of wind turbines are compared. Comparison results show that in the shaft torsional vibration pattern among wind farm units the double resonance peak phenomenon appears, and the increase of wind turbine number makes the real part of the eigenvalue of torsional vibrating pattern trending toward positive axis and corresponding damping ratio is decreased;the torsional vibration transferring among wind turbines in the same wind farm exists, and the number and layout of wind turbines in the wind farm influence the small signal stability of the wind farm.

关 键 词：风电场 轴系扭振 扭振模态 小干扰稳定性 

分 类 号：TM721[电气工程—电力系统及自动化]