基于双谐波绕组的混合励磁发电机励磁控制系统

为了解决不同运行工况下混合励磁同步发电机端电压恒定的问题，设计了一种基于全桥变换器拓扑的励磁控制系统。励磁系统采用以电枢绕组电压为外环、定子谐波励磁绕组电流为内环的双闭环控制策略，以谐波无刷混合励磁同步发电机端电压为反馈信号，通过调节定子谐波励磁绕组电流，以维持发电机端电压恒定。阐述了双谐波绕组的混合励磁发电机的基本结构和工作原理，设计了励磁控制系统的软硬件，并测试了励磁控制系统的性能。实验结果表明：调节定子谐波励磁绕组电流，可以很好的调节发电机的端电压；通过励磁控制系统的自动调节功能，实现了发电机在不同负载情况下的输出电压恒定。

Hybrid excitation generator excitation control system based on dual harmonic winding

In order to solve the problem of the constant voltage at the armature terminal of the hybrid excitation synchronous generator under different operating conditions, an excitation control system based on the full-bridge converter topology was designed. The excitation system adopts a double closed-loop control strategy with the armature winding voltage as the outer loop and the stator harmonic excitation winding current as the inner loop. Taking the terminal voltage of the harmonic brushless hybrid excitation synchronous generator as the feedback signal, the generator terminal voltage is kept constant by adjusting the current of the stator harmonic excitation winding. The basic structure and working principle of the hybrid excitation generator with double harmonic windings are expounded, the software and hardware of the excitation control system are designed, and the performance of the excitation control system is tested. The experimental results show that the terminal voltage of the generator can be well adjusted by adjusting the current of the stator harmonic excitation winding, and the output voltage of the generator can be kept constant under different loads through the automatic adjustment function of the excitation control system.