5Trzynadlowski A M, Patriciu N, Blaabjerg F, et al. A Hybrid,Current source/Voltage-source Power Inverter Circuit. IEEE Trans on Power Electronics, 2001, 16(6): 866-871
6Tang Yifan, Xu Longya. A Flexible Active and Reactive Power Control Strategy for a Variable Speed Constant Frequency Generator System. IEEE Trans on Power Electronics, 1995,10(4): 472-478
7Hansen L H, Helle L, Blaabjerg F, et al. Conceptual Survey of Generators and Power Electronics for Wind Turbines. Roskilde:Risφ National Laboratory, 2001
8Datta R, Ranganathan V T. Direct Power Control of Gridconnected Wound Rotor Induction Machine Without Rotor Position Sensors. IEEE Trans on Power Electronics, 2001,16(3): 390-399
9Krzeminski Z. Sensorless Multiscalar Control of Double Fed Machine for Wind Power Generators. In: Proceedings of the Power Conversion Conference, Vol 1. Osaka: 2002. 334-339
10Weigand H, Lauw H K, Marckx D A. Variable-speed Generation Subsystem Using the Doubly Fed Generator, NREL/SR-500-27066. National Renewable Energy Laboratory, 2000