基于变结构控制的变速恒频双馈风力发电机并网控制  

Cutting-in control based on variable structure control for VSCF doubly fed wind power generator

作　　者：赵宇[1] 王奔[1] 仇乐兵[1] 吴维鑫[1] 

机构地区：[1]西南交通大学电气工程学院,四川成都610031

出　　处：《电力自动化设备》2010年第9期77-81,共5页Electric Power Automation Equipment

摘　　要：将矢量控制技术、逆系统方法、变结构控制技术相结合,提出了一种新的变速恒频双馈风力发电机空载并网控制策略。双馈异步发电机的数学模型在m-t坐标系下是一个非线性耦合系统。采用逆系统方法将转子电压方程线性化解耦,构造出伪线性系统;然后,设计伪线性系统的变结构控制律;利用Matlab软件搭建了变速恒频双馈风力发电系统的仿真模型,进行仿真分析。仿真结果表明,所采用的控制策略能够完成发电机平滑接入电网,并网运行效果理想,实现了定子输出有功与无功功率的独立调节。与PI控制方案相比,变结构控制方案具有更好的动态响应性能。A control strategy is presented for the no-load cutting-in of VSCF doubly fed wind power generator,which combines the vector control,inverse system method and variable structure control.The math model of doubly fed induction generator is a nonlinear coupling system in m-t coordinates.With the inverse system method,the rotator voltage equations are linearized and decoupled to build a pseudo linear system,for which the variable structure controller is designed.The simulative model of VSCF doubly fed wind power generation system is established with Matlab.Simulative results prove that the generator cuts in grid smoothly under the decoupled control of stator active power and reactive power.Compared with the PI controller,the variable structure controller shows better dynamic performance.

关 键 词：风力发电 双馈异步发电机 矢量控制 变结构控制 并网 

分 类 号：TM315[电气工程—电机] TM614