结合矢量和直接功率控制的双馈风电机组研究

Study of the Combined Vector and Direct Power Control for DFIG-Based Wind Turbines

介绍了一种新型的结合矢量和直接功率控制的双馈风电机组控制策略,该控制策略实施在双馈风电机组的转子侧,控制器设计的目标是同时获取矢量控制和直接功率控制的优势。首先对双馈风电机组的矢量控制和直接功率控制进行分析,建立了两者之间的数学联系,然后对两者控制架构进行融合设计了新型控制器。新型控制器相对于矢量控制器具有响应快速、鲁棒性高和易于实施的优势,而相对于直接功率控制,具有较小的谐波输出、功率波动等优点。最后,基于MATLAB/Simulink平台对新型控制方法进行了仿真研究。仿真结果表明,在新型控制下机组具有较好的稳态和动态性能,优于传统的矢量控制和直接功率控制。

A doubly fed induction generators wind turbines which combined vector and direct power control was pro- posed. The controller was proposed for the rotor side converter of doubly fed induction generators, and the design goal of the controller was to get the advantages of vector control and direct power control. Firstly, the vector control and direct power control were analyzed, and the mathematical relationship between them was established. Then the construct of the two con- ventional controllers could be fused to build the new controller. The new controller benefits in comparison with vector con- trol include fast dynamic response, high robustness, and simple implementation. On the other hand, it had benefits in com- parison with direct power control, including less harmonic distortion and lower power ripple. Finally, based on the MAT- LAB/Simulink platform, the new control method had been simulated and studied. The simulation results show that the wind turbine has good steady-state and dynamic performance with the new controlXer, and confirm the superiority of the combined vector and direct power control over either vector control or direct power control.