电网技术Issue(10)：2904-2911,8.
改进的双馈风力发电系统小干扰模型
An Improved Small Perturbation Model for Doubly Fed Wind Power System
魏巍 1刘莹 2丁理杰 1李兴源3
作者信息
- 1. 四川电力科学研究院，四川省 成都市 610072
- 2. 四川省电力公司电力经济技术研究院，四川省 成都市 610041
- 3. 四川大学 电气信息学院，四川省 成都市 610065
- 折叠
摘要
Abstract
Based on rotor motion equation of doubly fed induction generator (DFIG), the mechanism of low-frequency oscillation with negative damping caused by connecting DFIGs to infinite bus system is analyzed to find out the grid operating conditions leading into negative damping and operational parameters impacting system damping. Based on Lyapunov theory an improved small perturbation model of DFIG is established. Different from traditional small signal stability model for DFIG, in the established model the mechanical characteristics of wind turbine, the drive characteristic of shafting, electromagnetic properties of induction generator and control characteristics at rotor side and stator side are totally reflected in the state equations of the DFIG, thus the oscillation modal of power grid after connecting induction generator to it can be reflected more accurately. The validity of the established model is verified by simulation results, on this basis, the system modals under different operating modes and different control approaches of double fed induction generator are compared.关键词
低频振荡/小干扰模型/双馈风力发电机/轴系模型Key words
low frequency oscillation/small perturbation model/doubly fed induction generator/shaft module分类
信息技术与安全科学引用本文复制引用
魏巍,刘莹,丁理杰,李兴源..改进的双馈风力发电系统小干扰模型[J].电网技术,2013,(10):2904-2911,8.
