不对称电压跌落下双馈风电机组无功极限分析  

Reactive power capability analysis of Doubly-Fed induction generators under unbalanced grid voltage drop conditions

作　　者：丘晓明[1,2,3] 赵斌[2,3] 王玲玲[2,3] 胡书举[2,3] 

机构地区：[1]中国科学院研究生院,北京100190 [2]中国科学院电工研究所,北京100190 [3]中国科学院风能利用重点实验室,北京100190

出　　处：《可再生能源》2013年第6期43-46,51,共5页Renewable Energy Resources

基　　金："863"计划"海岛风光流混合供电集成控制系统"项目(2011AA050204)

摘　　要：文章分析了定子侧最大电流对DFIG在不对称电压跌落下无功极限的限制。根据3种限制因素,以及4种不同控制目标下,转子正负序dq轴电流与给定定子有功、无功的关系,得到无功极限曲线。根据无功极限曲线设计功率限幅器,并在DFIG机组上进行仿真,结果表明,该限幅器可以有效地减小crowbar投入次数,提高系统低电压穿越能力。It is analyzed that the stator side maximum current restricts reactive power limit of DFIG under the unbalance voltage drop. A reactive power limit curve is gotten from the relationship among positive and negative sequence current of rotor dq-axis, stator active power and reactive power that are given, according to three kinds of limitations, as well as four different control objectives. A limiter is designed based on the reactive power limit curve, and a DFIG simulation is carried out. The results show that the limiter can effectively reduce the times of input crowbar action, improve system performance of low voltage ride through.

关 键 词：不对称电压跌落 DFIG 无功极限 功率限幅器 

分 类 号：TK6[动力工程及工程热物理—生物能] TQ546[化学工程—煤化学工程]