双馈电机转子交流励磁矢量控制电压波形分析

The analysis of voltage wave of doubly-fed generator with vector control for rotor AC excitation

以矢量控制作为转子交流励磁控制方法,建立了双馈电机在变速恒压、恒频发电机运行时的数学模型和仿真模型。对启动和较大转速扰动时的动态过程进行了计算机仿真,得出了转速变化时转子交流励磁电压和定子输出电压的动态波形。结果表明,双馈电机采用转子交流励磁的矢量控制后,具有良好的动态特性,但又存在值得注意的问题。为励磁变频器的设计和控制提供了有意义的依据,对风力机的选用也十分有用。

Based on the vector control for rotor AC excitation, the mathematical and simulation model of variable-speed constant-voltage constant-frequency (VSCVCF) doublyfed generator are established. After the starting performance and speed disturbance are simulated, the rotor voltage and stator voltage wave are given. The results show that the doubly-fed generator has a good dynamic performance, and a problem is also found. It provides a important basis for the control and the design of the converter, and is also useful for the selection of wind turbine.