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Brushless Doubly-Fed Induction Machine as a Variable Frequency Transformer

Brushless Doubly-Fed Induction Machine as a Variable Frequency Transformer
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摘要 VFT (variable frequency transformer) has been recently used as art alternative to HVDC (high voltage direct current) to control power flow between asynchronous networks. VFT consumes less reactive power than a back-to-back HVDC system, provides faster initial transient recovery, and has better natural damping capability. VFT is simply a DFIM (doubly-fed induction machine) where the machine torque controls the power flow from stator to rotor and vice versa. The main disadvantage of this VFT is the slip rings and brushes required for the rotor circuit, especially in bulk power transmission. The BDFM (brushless doubly-fed machine) with nested cage rotor machine is proved to be a comparable alternative to conventional DFIM in many applications with the advantage that all windings being in the stator frame with fixed output terminals. In this paper, the BDFM is used as a BVFT (brushless variable frequency transformer). A prototype machine is designed and simulated to verify the system validity.
出处 《Journal of Energy and Power Engineering》 2013年第1期110-117,共8页 能源与动力工程(美国大卫英文)
关键词 Variable frequency transformer brushless doubly-fed machines AC machines induction machine. 无刷双馈电机 变频变压器 感应电机 高压直流系统 转矩控制 转子电路 VFT HVDC
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参考文献20

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