【摘要】 无刷双馈发电机无电刷和集电环,具有免维护而可靠性高、变流器容量小等优点,极有可能竞争目前风电系统中普遍使用的传统有刷双馈感应发电机和永磁同步发电机。针对新型复合转子结构无刷双馈风力发电机功率绕组有功和无功功率的控制需求,按照控制绕组磁链所在扇区,采用查表方式确定控制绕组机侧变流器的电压空间矢量,进而对其最大功率跟踪及单位功率因数等进行有效的直接功率控制。通过对比8/4极25kW样机测试系统的仿真与实验结果,证明了所提复合转子无刷双馈风力发电机直接功率控制的正确性、可靠性和有效性。更多还原

【Abstract】 Because of no brushes and slip rings, brushless doubly-fed generators(BDFGs) have some advantages of maintenance-free thus higher reliability, smaller partially-rated converter and so on, which make them very possibly as a competitor for the doubly-fed induction generator and permanent magnet synchronous generator commonly used in wind energy conversion system s(WECS). In this paper, the direct power control(DPC) strategy for the BDFG with a novel hybrid rotor is presented, where according to the real and reactive power errors and sector number of the control winding flux vector, the variable-speed constant-frequency(VSCF) maximum power point tracking(MPPT) and unity power factor control(UPFC) can be implemented by applying the proper voltage space vector obtained with the traditional lookup-table on the machine side converter of control winding. Finally, the correctness, reliability and effectiveness of the proposed DPC for the novel BDFG are all be proved by the detailed simulation results and experimental measurements based on M atlab/Simulink and 8/4-25 kW prototype laboratory test rig.更多还原