变速恒频双馈风力发电机组的非线性因素分析  

Analysis on Nonlinear Factors of Variable Speed Constant Frequency Doubly Fed Wind Turbine Generator System

作　　者：张鲁华[1] 蔡旭[1] 郭家虎[1] 

机构地区：[1]上海交通大学风力发电研究中心,上海市闵行区200240

出　　处：《电网技术》2009年第19期164-168,共5页Power System Technology

基　　金：上海市科教兴市项目(05dz12001);上海市科委重大专项(08DZ1200504);上海市科委项目(08DZ2210502);上海市经委重大专项(ZX08030)

摘　　要：双馈风力发电机组主要由双馈感应异步发电机和背靠背的电压型变换器组成,其中双馈感应异步发电机是非线性、强耦合、多变量的系统,背靠背的电压型变换器因直流母线电容的耦合也存在非线性因素。结合双馈电机及变换器的数学模型,系统研究了双馈风力发电机组中的非线性因素,分析了传统矢量控制的优点及不足,探讨了基于非线性解耦控制的双馈风力发电机组控制策略的可行性,指出了旋转坐标变换在弱化系统非线性时的作用。A doubly fed wind turbine generator system mainly consists of a doubly fed induction generator （DFIG） and back-to-back voltage source converters （VSCs）. The DFIG is a nonlinear and strong-coupled system with multi-variables and due to the coupling of capacitors of DC bus the VSCs also contain nonlinear factors. The authors systematically research nonlinear factors of DFIG system according to their mathematical models and analyze the advantages and defects of traditional vector control strategy, meanwhile investigate the feasibility of the nonlinear decoupling control based control strategy for DFIG units. The effect of attenuating nonlinear components by coordinate transformation is pointed out.

关 键 词：双馈风力发电机组 电压型变换器 非线性因素 坐标变换 非线性解耦控制 

分 类 号：TM614[电气工程—电力系统及自动化]