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Stable Adaptive Inertial Control of a Doubly-Fed Induction Generator

机译：双馈感应发电机的稳定自适应惯性控制

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摘要

This paper proposes a stable adaptive inertial control scheme of a doubly-fed induction generator. The proposed power reference is defined in two sections: the deceleration period and the acceleration period. The power reference in the deceleration period consists of a constant and the reference for maximum power point tracking (MPPT) operation. The latter contributes to preventing a second frequency dip (SFD) in this period because its reduction rate is large at the early stage of an event but quickly decreases with time. To improve the frequency nadir (FN), the constant value is set to be proportional to the rotor speed prior to an event. The reference ensures that the rotor speed converges to a stable operating region. To accelerate the rotor speed while causing a small SFD, when the rotor speed converges, the power reference is reduced by a small amount and maintained until it meets the MPPT reference. The results show that the scheme causes a small SFD while improving the FN and the rate of change of frequency in any wind conditions, even in a grid that has a high penetration of wind power.
机译：本文提出了一种双馈感应发电机的稳定自适应惯性控制方案。提议的参考功率分为两部分：减速期和加速期。减速期间的功率参考值由一个常数和最大功率点跟踪（MPPT）操作的参考值组成。后者有助于在此期间防止第二次频率下降（SFD），因为在事件的早期阶段，第二次频率下降（SFD）的降低率很大，但随着时间的推移会迅速降低。为了提高频率最低点（FN），将恒定值设置为与事件发生之前的转子速度成比例。该参考确保转子转速收敛到稳定的工作区域。为了在导致小SFD的同时加快转子速度，当转子速度收敛时，功率参考值会减小一小部分，并保持到达到MPPT参考值为止。结果表明，即使在风电渗透率高的电网中，该方案在提高风阻和频率变化率的同时，也能减小SFD。

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