作者:
S Tohidi，H Oraee，MR Zolghadri，S Shao，P Tavner
关键词:
angular velocity control ； asynchronous generators ； brushless machines ； coupled circuits ； electric potential ； machine control ； power generation faults ； power grids ； reactive power control ； resistors
摘要:
This paper discusses the dynamic behavior of the brushless doubly fed induction generator during the grid faults which lead to a decrease in the generator's terminal voltage. The variation of the fluxes, back EMFs, and currents are analyzed during and after the voltage dip. Furthermore, two alternative approaches are proposed to improve the generator ride-through capability using crowbar and series dynamic resistor circuits. Appropriate values for their resistances are calculated analytically. Finally, the coupled circuit model and the generator's speed and reactive power controllers are simulated to validate the theoretical results and the effectiveness of the proposed solutions. Moreover, experiments are performed to validate the coupled circuit model used.
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