双馈风电机组参数及运行状态的小干扰稳定性分析  

Analysis of parameter and operation state on small-signal stability of doubly-fed wind turbine generation system

作　　者：李辉[1] 张志科[1] 杨超[1] 赵斌[1] 唐显虎 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044 [2]重庆科凯前卫风电设备有限责任公司,重庆401121

出　　处：《电机与控制学报》2013年第2期14-21,共8页Electric Machines and Control

基　　金：输配电装备及系统安全与新技术国家重点实验室自主研究项目(2007DA10512710101);国家重点基础研究发展计划项目(973计划)(2012CB215200);新世纪优秀人才支持计划资助项目(NCET-10-0878);重庆市科技攻关计划项目(CSTC;2011AB3069)

摘　　要：为了提高大规模风电并网的稳定性以及风电机组对电网的适应能力,有必要研究风电机组参数及运行状态对其自身小干扰稳定性的影响。考虑风电机组运行特点,建立含风力机传动链、变桨系统和发电机的双馈风电机组小信号分析模型。基于模态分析方法,通过计算特征值和参与因子获得相应的模态;分析风力机传动链机械参数、发电机电气参数和机组运行状态对特征值的影响程度。引入参数灵敏度的概念,研究不同运行状态下特征值对不同参数的灵敏度。结果表明,机械参数对轴系模态的振荡频率影响较大,电气参数对系统模态的阻尼影响较大;系统的主导模态会随机组运行状态的改变而变化,且相同特征值对同一参数的灵敏度存在较大不同。In order to improve the stability of large-scale wind power integrated to the power grid and the adaptivity of wind turbine generation system, it is necessary to analyze the impact of wind turbine genera- tion system parameters and operating states on the small-signal stability. The small-signal analysis model of doubly-fed wind turbine generation system considering the operating characteristics was established, in- cluding wind turbine drive train, pitch control system and the generator. Based on modal analysis meth- od, the corresponding modals were obtained by calculating the eigenvalues and participation factors, and the influences of drive train mechanical parameters, generator electrical parameters and the operating states on egienvalues were studied. Parameter eigenvalues sensitivity in different operating conditions was also analyzed by introducing the concept of eigenvalue sensitivity. The results show that the oscillation frequency of shaft modal is obviously influenced by mechanical parameters, while the damping of all too- dais are influenced mainly by electrical parameters. With operating states changing, the system dominant modal is different, and the eigenvalues sensitivity to the same parameters is also quite different.

关 键 词：风力发电 双馈风电机组 小干扰稳定性 模态分析 特征值灵敏度 

分 类 号：TM614[电气工程—电力系统及自动化]