不平衡负载下无刷双馈发电机控制策略研究  

Research on BDFG Control Strategy with Unbalanced Loads

作　　者：张帅[1] 柴琳[1] 刘惠康[1] 

机构地区：[1]武汉科技大学信息科学与工程学院,武汉430081

出　　处：《中国农村水利水电》2014年第7期157-161,共5页China Rural Water and Hydropower

基　　金：国家自然科学基金资助项目(61174107)

摘　　要：采用无刷双馈发电机的农村水力水电站运行时,由于负载多为民用电,造成三相负载不平衡。若在控制中不予考虑,会引起发电系统有功和无功的脉动以及电磁转矩的波动,影响系统发电效率。该文基于对称分量法,推导了不平衡负载下无刷双馈发电机的数学模型,分析了负序电压对采用PI控制器的无刷双馈发电机控制策略的影响,并提出了基于内模控制(IM)的矢量控制策略来改进。SIMULINK仿真结果显示电磁转矩波动明显减少,且无功功率可以实现无差跟踪控制。When rural hydroelectric station using BDFG water turbine operates with three-phase unbalanced loads, it will cause ac- tive, reactive power and electromagnetic torque fluctuations. In this paper, the model of BDFG with unbalanced loads is derived based on the symmetrical component theory, the impact of negative sequence voltage on the BDFG vector control theory based on PI controller. And then vector control of BDFG with IMC is presented. Theoretical analysis and simulated results show that the pro- posed theory is correct and effective.

关 键 词：无刷双馈发电机 水力发电 不平衡负载 内模控制 MATLAB仿真 

分 类 号：TM31[电气工程—电机]