基于三质量块模型的失速型风机小信号建模和模态分析  

Small-signal modeling and modal analysis based on three-mass shaft model for stall wind turbine

作　　者：娄宇成[1] 解大[1] 冯俊淇[2] 王西田[1] 杨敏霞[1] 

机构地区：[1]上海交通大学电气工程系,上海200240 [2]华东电力设计院,上海200331

出　　处：《电力自动化设备》2015年第8期124-130,共7页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51277119)~~

摘　　要：风电场大规模接入电网可能增加区域电网低频振荡和风电机组轴系扭振的风险,研究风机建模及扭振特性是保证电力系统安全稳定的重要课题。以失速型风电机组为例,建立基于三质量块轴系模型的单机对无穷大母线系统小信号模型,并采用模态分析法探讨系统电气参数对失速型风电机组轴系扭振特性的影响。为方便不同机型及多机风电机组的扭振特性的拓展研究,系统各部分模型相对独立。在单机对无穷大母线系统模型的基础上建立简化失速型风电场多机小扰动仿真模型,研究风电场扭振模态的变化,MATLAB仿真验证了该模型用于风电机组轴系扭振问题研究的有效性和准确性。Since the large-scale integration of wind farms regional low frequency oscillation and wind turbine shafting its torsional vibration characteristics are studied to ensure into power grid is likely to increase tlae risk ot torsional vibration,the wind turbine modeling and the security and stability of power system. With the stall wind turbine as an example,a small-signal model of an infinite bus with single wind turbine,which is based on the three-mass shaft model,is established and the modal analysis is applied to discuss the impact of system electric parameters on the torsional vibration characteristics,each component model is relevant independent for the further research of torsional vibration characteristics of stall wind turbine. The system component models are independent of each other to facilitate the further study for different turbine types and multi-turbine unit,based on which,a simplified small-signal simulation model is built for a wind farm with multiple stall turbines and the variation of its torsional vibration modal is researched. The simulation with MATLAB verifies the effectiveness and correctness of the model for the research of wind turbine torsional vibration.

关 键 词：风电 失速型风机 三质量块模型 小信号模型 模态分析 轴系扭振 模型 

分 类 号：TM614[电气工程—电力系统及自动化]