几种双馈电机交流励磁控制策略的对比分析

双馈电机变速恒频发电系统是通过调节转子绕组励磁电流的频率、幅值、相位及相序来实现变速恒频控制的。目前,研究最多的控制方式是转子励磁电流矢量控制。比较了三种常用的双馈发电机励磁控制策略:矢量控制、直接转矩控制和直接功率控制,分别对其控制原理和优缺点进行了详细分析,为双馈发电机励磁控制系统的设计奠定了理论基础。

Control Scheme Comparison of Double-Fed Generation Excitation System

The control of variable speed constant frequency(VSCF) for doubly-fed generation system is implemented by controlling the frequency,amplitude,phase angle and sequence of the rotor currents.At present,Vector control scheme of rotor excitation current is mostly analyzed.Three types of control schemes are compared,which are separately vector control,direct torque control and direct power control,and their working principles and shortcomings are analyzed.The study establishes the foundation for the control system design and implementation of the doubly-fed generator.