机械轴系模型对直驱永磁同步风力发电机暂态分析的影响  

Influence of Shafting Models in the Transient Analysis of Wind Turbines with Permanent Magnet Synchronous Generators

作　　者：刘忠义 刘崇茹 李庚银 

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京102206

出　　处：《电工技术学报》2016年第2期145-152,共8页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金重大项目(51190103);教育部新世纪优秀人才支持计划(NCET-12-0846);高等学校学科创新引智计划("111"计划)(B08013)资助项目

摘　　要：主要研究机械轴系模型对直驱永磁同步风力发电机暂态分析的影响。利用能量守恒原理从理论上详细分析了直驱风机机械轴系分别采用两质块模型和单质块模型时机组的暂态响应情况,阐明了不同机械轴系模型造成直驱风机暂态分析结果差异的机理。然后通过时域仿真研究了直驱风机采用不同机械轴系模型以及不同控制方法时的暂态响应特性,验证了理论分析的正确性,并给出了适用于直驱风机暂态分析的机械轴系模型选取原则。研究结果表明:相较两质块模型,单质块模型会使直驱风机机械轴系的暂态振荡幅度偏小;没有附加阻尼控制的直驱风机,其机械轴系应该使用两质块模型进行暂态研究;具有附加阻尼控制的直驱风机,则可以采用单质块模型模拟机械轴系的暂态行为。This paper mainly studies the influence of shafting models on the transient analysis of wind turbines with permanent magnet synchronous generator （PMSG）. Based on the principle of energy conservation, the transient responses of PMSGs with double mass model or single mass model are compared. The mechanism about different shafting models causing different results of transient analysis is figured out. The transient responses of PMSGs with different shafting models and different control strategies are studied by simulations. A principle of shafting model selection suitable for PMSG transient analysis is also proposed. It is shown that the transient oscillation amplitude of PMSG shafting is smaller when the single mass model is adopted. For PMSG without damping control, the double mass model should be used, while for PMSG with damping control, the single mass model can be applied.

关 键 词：直驱永磁同步风力发电机 机械轴系模型 暂态分析 能量守恒原理 

分 类 号：TM614[电气工程—电力系统及自动化]