级联式无刷双馈航空发电机的仿真研究

Simulation of a Cascade Brushless Doubly Fed Aeroplane Generator

为了在飞机发动机转速变化的情况下得到恒频恒压的交流电,通过对级联式无刷双馈航空发电机结构和工作原理的分析,建立了级联式无刷双馈发电机转子机械速坐标系的数学模型,提出了定子磁链定向的矢量控制的级联式无刷双馈发电机控制策略,分析了其电磁和能量各平衡关系,研究了励磁系统核心装置SPWM变频器。使用matlab/simulink软件对系统及其控制策略进行了仿真分析。仿真结果表明采用定子磁链定向的矢量控制策略,可以使级联式无刷双馈发电机在转速变化的情况下,保证发电系统输出恒频恒压的三相交流电。

To gain a constant frequency and constant voltage alternating current when the speed of aeroplane engine changes, through analysing the structure and VSCF electricity generating principle of a cascade Brushless Doubly fed Aeroplane Generator, a BDFG＇ s mathematical model is built,a BDFG＇ s control strategy based on the stator field orientation vector control theory is put forward the relation between electromagnetism and energy balance is analysed, and the core device of the excitation system named SPWM frequency inverter is studied. Finally , simulation and analysis of the whole system and control strategy are carried out by using matlab/simulink software. The result of the simulation indicates that the stator field orientation vector control strategy can enable the generating system to export three - phase alternating current of const frequency and const voltage, when the rotate speed of Brnshless Doubly fed Generator is changing.