双馈电机在电网电压不平衡下网侧控制策略研究  

Research on Grid-side Converter Strategy for Dou-bly-Fed Induction Generator Based on Unbalanced Grid

作　　者：范晓旭[1] 孙建建[2] 田涛[2] FAN Xiaoxu;SUN Jianjian;TIAN Tao(CLYPG,Beijing,100034 China;CCE,NCEPU,Beijing,102206 China)

机构地区：[1]龙源电力集团股份有限公司,北京100034 [2]华北电力大学,北京102206

出　　处：《风力发电》2019年第1期27-34,共8页Wind Power

摘　　要：双馈电机凭借其良好的发电性能,逐渐成为国际上风力发电的主流机型之一。本文建立了电网电压平衡和不平衡下的双馈电机的数学模型。进一步研究两种情况下的双馈电机的网侧变频器[1]的控制策略。在电网电压不平衡的情况下,仿真研究磁链定向的矢量控制策略和基于正负序分离的矢量控制策略,并比较两者的控制性能。利用Matlab/Simulink和LabVIEW仿真验证了,后者能消除二倍频脉动且谐波总畸变率更低。Doubly-fed induction generator(DFIG)are becoming the mainstream of wind power generation in the world due to their good power generation performance.In this paper,the mathematical models of DFIG with grid balance and unbalance is established.The control strategy of DFIG is further studied in both condition.In the case of unbalanced grid voltage,The vector control strategy of flux orientation and the vector control strategy based on positive and negative sequence separation are simulated and the control strategies’performance are compared by Matlab/Simulink and LabVIEW.The conclusion is that the latter can completely eliminate the double frequency harmonic pulse and the total harmonic distortion rate is lower.

关 键 词：双馈风机 电网电压不平衡 控制策略 LABVIEW 

分 类 号：TM7[电气工程—电力系统及自动化]