This paper presents the performance analysis of brushless doubly fed induction generator (BDFIG) during symmetrical voltage dips. The equivalent circuit consists of resistances and dependent voltage sources in its rotor loop; thus, its voltage-dip analysis becomes more challenging. To overcome such difficulty, a reduced full-order model of the BDFIG into a new T-model is presented. A detailed mathematical analysis is performed subject to voltage-dip conditions. The time variation for the machines fluxes, electromotive forces, voltages, currents, and active and reactive powers are analyzed and their analytical approaches are derived. The current/voltage stress of power converter during voltage dip is discussed. The accuracy of the proposed T-model and the theoretical voltage dip is confirmed via experimental tests on a 3-kW BDFIG, and simulation results of a 2-MW BDFIG.

中文翻译：

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使用简化T模型的无刷双馈感应发电机的电压跌落分析

本文介绍了在对称电压骤降期间无刷双馈感应发电机 (BDFIG) 的性能分析。等效电路由转子回路中的电阻和相关电压源组成；因此，其电压骤降分析变得更具挑战性。为了克服这个困难，提出了将 BDFIG 的全阶模型简化为新的 T 模型。根据电压骤降条件进行详细的数学分析。分析了电机通量、电动势、电压、电流以及有功和无功功率的时间变化，并推导出它们的分析方法。讨论了电压骤降期间电源转换器的电流/电压应力。通过对 3 kW BDFIG 的实验测试，证实了所提出的 T 模型和理论电压骤降的准确性，