For the power system integrated with the doubly-fed induction generators (DFIGs), the frequency regulation may be provided by the DFIGs in addition to the synchronous generators (SGs). With the model predictive control (MPC), the active power output of the DFIG is adjusted by predicting the system frequency with the dynamic power flow (DPF) algorithm. In this paper, the governor delay of the SGs is included to improve the accuracy of the DPF-based prediction model. The DPF predicts the frequency response with the desired active power response of the DFIG. To reach the reference with the high accuracy and efficiency, the MPC-based direct rotor current control is applied to adjust the active power output in coordination with the frequency regulation, forming the proposed hierarchical frequency control strategy. The mechanical transient of the DFIGs involving the shaft and pitch angle system is included in the DPF model to introduce the mechanical constraints of the DFIGs to the MPC. © 2022 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

中文翻译：

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基于改进动态潮流的双馈并网电力系统频率分级预测控制

对于集成了双馈感应发电机（DFIG）的电力系统，除同步发电机（SG）外，还可以由双馈发电机提供频率调节。借助模型预测控制 (MPC)，DFIG 的有功功率输出通过使用动态潮流 (DPF) 算法预测系统频率来调整。在本文中，包括 SG 的调速器延迟以提高基于 DPF 的预测模型的准确性。DPF 使用 DFIG 的所需有功功率响应来预测频率响应。为了达到高精度和高效率的基准，应用基于MPC的直接转子电流控制来调节有功功率输出与频率调节相协调，形成所提出的分级频率控制策略。涉及轴和俯仰角系统的 DFIG 的机械瞬态包含在 DPF 模型中，以将 DFIG 的机械约束引入 MPC。© 2022 日本电气工程师学会。由 Wiley Periodicals LLC 出版。