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  

Research of AC excited VSCF wind power generator excitation control system based on variable structure control

作　　者：赵宇[1] 郭清滔[2] 王奔[1] 吴维鑫[1] 仇乐兵[1] 

机构地区：[1]西南交通大学电气工程学院,四川成都610031 [2]福建省电力试验研究院,福建福州350007

出　　处：《电力系统保护与控制》2010年第15期12-17,23,共7页Power System Protection and Control

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m-t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。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 m-t coordinate system.This paper proposes a novel control method.First,the original 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 of the pseudo-linear system is designed.Finally,the excitation control simulation model of DFIG is established.The simulation result demonstrafes that the combination of vector control and variable structure control can realize the independent decoupling control of active and reactive power in system output.Compared with PI controller,variable structure controller shows better dynamic response.

关 键 词：双馈异步发电机 矢量控制 变结构控制 交流励磁 

分 类 号：TM315[电气工程—电机]