基于直接转矩控制的双馈感应电机速度及无功控制  

DTC-based Speed and Reactive Power Control for a Doubly-fed Induction Machine

作　　者：关中杰[1] 赵克友[1] 

机构地区：[1]青岛大学自动化工程学院,山东青岛266071

出　　处：《青岛大学学报（工程技术版）》2007年第4期11-16,共6页Journal of Qingdao University(Engineering & Technology Edition)

基　　金：山东省自然科学基金项目资助(Y2003G02)

摘　　要：基于直接转矩控制原理,给出了双馈感应电机一个新的转子速度与定子侧无功控制策略。通过适当选择转子侧电压矢量,即可通过转矩内环和转子磁链幅值内环达到速度与无功控制。所研究的系统当其用于拖动场合可提高用户端功率因数,用于风力发电场合在进行最大风能跟踪的同时可参与电网无功调节。对一个由15 kW双馈感应电机构成的系统进行了仿真实验,结果显现本策略在速度与无功指令值及定、转子电阻变化时所具有的有效性和鲁棒性。Based on the famous direct torque control （DTC） principle, the paper presents a novel control strategy of rotor speed and stator reactive power for a doubly-fed induction machine, which is realized by selecting appropriate voltage vectors on the rotor side. The main idea is that speed control and reactive power control are respectively by means of a torque inner loop and a rotor flux amplitude inner loop. The system we explored can be applied to （i） driving systems aimed at raising user side power-factor, and （ii） wind power generation systems aimed at tracking the maximal power point and regulating reactive- power of grid. Simulation results on a 15 kW DFIM system are provided to demonstrate the effectiveness and robustness of the proposed control strategy during variations of speed and reactive power references, some machine parameters, and load.

关 键 词：双馈感应电机 速度及无功控制 直接转矩控制 

分 类 号：TM346[电气工程—电机]