摘要
以双馈电机的矢量控制技术为研究对象,采用交流/直流/交流变流器作为主电路。交流/直流采用三相三电平整流器实现网侧的单位功率因数,减少对电网污染的同时实现能量的双向流动。直流/交流采用三电平逆变器,并对双馈电机进行定子磁链定向的矢量控制,定子侧功率因数为1,且电机动态性能良好。本文还采用了一种新型的电压空间矢量脉宽调制算法对三电平逆变器的电压空间矢量平面进行简化,将三电平逆变器电压空间矢量平面简化至两电平空间矢量平面,并方便地实现了对中点电位平衡的控制。
The double-fed control strategy for double-fed induction motor is investigated in this paper. The AC/DC/AC converter is used as main circuit. Three phase three-level rectifier is used as AC/DC block. This rectifier works with low grid side＇s harmonic distortions .Besides, it maintains a high power factor while the energy flows in bidirectional way. For the DC/AC converter, three-level inverter is adopted. Using stator-flux oriented vector control, the double-fed induction motor gains a high dynamic performance when the stator side is controlled operating in an unity power factor condition. In this paper a novel simplified space-vector pulse width modulation （SVPWM） method was proposed to simplify the space-vector diagram of a three-level inverter into that of a two-level inverter. The neutral-point potential balance can be easily realized with this method.
出处
《电工技术学报》
EI
CSCD
北大核心
2009年第6期24-29,共6页
Transactions of China Electrotechnical Society
关键词
双三电平
空间矢量脉宽调制
定子磁场定向控制
中点电位平衡
双馈电机
Dual three-level, space vector pulse width modulation（SVPWM）, stator flux oriented control, neutral-point potential balance, double-fed motor
