提出一种适用于电推进飞机的基于定子双绕组感应发电机的航空交流并联发电系统。目前电推进飞机电力系统架构设计中沿用了航空变频交流发电系统广泛使用的变速变频同步发电机。现有研究实践中,变速变频同步发电机组被认为在常规运行时只能工作于非并联状态。这种各发电通道独立的架构限制了系统的电力集成度。利用定子双绕组感应发电机的异步发电特性和其控制绕组AC-DC-AC机组互联拓扑,可以突破电推进飞机发电系统使用变速变频同步发电机而无法交流并联的限制。提出一种应用于定子双绕组感应发电机待并联机组的基于功率流调节的协调并联控制方案以实现不依赖原动机的频率相位同步调节。理论和实验表明该系统拥有灵活的并车控制性能和良好的并联输出功率自平衡性能,所提出的系统结构和控制方式使得定子双绕组感应发电机并联发电系统成为电推进飞机发电系统的一种可行方案。
This article proposes a parallel AC power generation system based on Dual-stator Winding Induction Generators (DWIG) which is suitable for electric propulsion aircraft. At present, the Variable-Speed Variable-Frequency (VSVF) synchronous generator, which is widely used in the aircraft variable-frequency AC power system, is used in the architecture design for the electric propulsion aircraft power system. In existing research and practice, the VSVF synchronous generator is considered to only work in the non-parallel state during normal operation. This structure of independent channels limits the power integration of the system. Taking advantage of the asynchronous characteristics of the DWIG and its control winding’s AC-DC-AC topology, the limitation that the generation system of electric propulsion aircraft cannot operate in parallel due to the VSVF synchronous generator can be overcome. This article proposes a coordinated control scheme for parallel operation based on power flow control, which is applied to the DWIG to realize synchronization of frequency and phase which is independent of the prime mover. Theory and experiments show that the proposed parallel generation system has flexible control performance and great self-balance in output power. The proposed system structure and control method make the parallel power system based on the DWIG a feasible architecture for electric propulsion aircraft.
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