基于变结构控制的交流励磁变速恒频风力发电机励磁控制研究
赵宇 ，郭清滔 ，王奔 ，吴维鑫 ，仇乐兵
(1．西南交通大学电气3-程学院，四川成都61 0031；2．福建省电力试验研究院，福建福州350007)
摘要：根据交流励磁变速恒频风力发电系统的特点，将矢量控制技术应用于双馈发电机励磁控制。双馈异步发电机的数学模
型在彤^，坐标系下，是一个非线性耦合系统。引入逆系统方法将原系统线性化解耦，构造出伪线性系统。设计伪线性系统的
变结构控制律。建立双馈发电机的励磁控制仿真模型。仿真结果表明，矢量控制与变结构控制相结合的控制策略能够实现系
统输出有功功率、无功功率的独立解耦控制。变结构控制与PI控制相比，具有更好的动态响应性能。
关键词：双馈异步发电机；矢量控制；变结构控制；交流励磁
Research ofAC excited VSCF wind power generator excitation control system
based Oil variable structure control
ZHAO Yu ，GUO Qing—tao ，WANG Ben ．WU Wei—xin。，QIU Le-bing
(1．Southwe~Jiaotong University，Chengdu 610031，China； 2．Fujian Electric Power Test&Research Institute，Fuzhou 350007，China)
Abstract：According to the characteristic of AC—excited variable speed constant frequency wind power generation，vector control
technique is applied to excitation control of doubly fed induction generator(DFIG)．The mathematic model of DFIG is a coupling
nonlinear system in synchronous rotating - coordinate system．This paper proposes a novel control method． First，the 0ri nal
system model of DFIG is linearized and decoupled to be a pseudo—linear system which is made up of original system and inverse system．Then，the variable structure control laws ofthe pseudo—linear system is designed．Finally，the excitation control simulation
modeI ofDFIG iS established．The simulation result demonstrafes that the combination ofvector controI and variable structure control
call realize the independent decoupling control of active an d reactive power in system output．Compared with PI controller，variable
structure controller shows better dynamic response．
Key wordst doubly fed induction generator；vector control：variable structure control：AC—excited
中图分类号： TM76 文献标识码：A 文章编号： 1674．3415(2010)15．0012．0
发表于 2011-2-4 00:29:50
