基于小干扰稳定的双馈感应电机电磁模型降阶分析  

Small Signal Based Reduced Electromagnetic Model Analysis of Double Fed Induction Generator

作　　者：张宝群[1] 张伯明[1] 吴文传[1] 

机构地区：[1]清华大学电机系电力系统国家重点实验室,北京市100084

出　　处：《电力系统自动化》2010年第10期51-55,共5页Automation of Electric Power Systems

基　　金：电力系统及发电设备控制和仿真国家重点实验室自主研究课题资助项目(SKLD09M06)

摘　　要：研究了适用于小干扰稳定分析的双馈感应电机的降阶模型。首先,建立描述双馈感应电机电磁过程的8阶详细模型;以此为基础,根据双馈感应电机各个物理量的衰减快慢关系提出了保留锁相环动态的简化2阶模型,并分析了影响该模型稳定性的因素;最后,采用李雅普诺夫稳定性判别法,通过算例比较了2阶模型与详细模型以及依据传统方法提出的6阶模型的小干扰稳定边界。结果表明:与6阶模型相比,文中提出的2阶模型的稳定边界更符合8阶详细模型对系统稳定性的描述。A reduced order model of double fed induction generator （DFIG） for small signal stability analysis is investigated. Firstly,an 8th order detailed model to describe the DFIG electromagnetic process is established. Based on the 8th order model,a simplified 2nd order model with the phase-locked loop （PLL） dynamic state is presented according to the attenuation speed of the relationship between various physical quantities of the DFIG,and the factors of affecting the simplified 2nd order model stability are analyzed. Finally,using the Lyapunov eigenvalue theory,the stability boundaries of the detailed model,and the 2nd order model and the 6th order model put forward by the conventional method are compared through numerical examples. The results show that,the simplified 2nd order model is more consistent with the description of the detailed 8th order model than the 6th model on the small signal stability of the system.

关 键 词：风力发电 双馈感应电机 定子磁链暂态 锁相环 简化模型 小干扰稳定性 

分 类 号：TM346[电气工程—电机]