Influence of Hotspot Temperature in End Region on Power Regulation Capability of AC-Excited Generation-Motor

IF 4.5 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Industry Applications Pub Date : 2025-06-26 DOI:10.1109/TIA.2025.3583654

Hongjin Guo;Guorui Xu;Xueshen Cui;Yi-an Yan;Haisen Zhao

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Abstract

An AC-Excited Generator-Motor (ACEGM) is widely used in the variable speed pumped storage power station due to its flexible and powerful power regulation capability. However, the power regulation range can be restricted by the hotspot temperature in the end region of the ACEGM. In order to study the temperature distribution laws of the stator and rotor end structural components, a three-dimensional electromagnetic- fluid-thermal coupling model in the end region of the ACEGM is established. The flux densities, losses and temperatures in the end core, tooth plate, stator clamping plate and rotor retaining ring are studied under the different operating conditions. Through thermal analysis, the hotspot location in the stator and rotor end regions has been pinpointed. The hotspot temperature variations in the stator and rotor end regions along with the changes of the active and reactive powers are studied. The power regulation range of the ACEGM is determined by the thermal limits of the stator and rotor end components. The study can provide a theoretical foundation for optimizing the stator and rotor end-region structures and enhancing the power regulation capability of ACEGMs.

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端区热点温度对交流励磁发电电机功率调节能力的影响

交流励磁发电机电动机以其灵活、强大的功率调节能力被广泛应用于变速抽水蓄能电站中。然而，ACEGM的功率调节范围会受到端区热点温度的限制。为了研究定子和转子端部结构部件的温度分布规律，建立了ACEGM端部区域的三维电磁-流-热耦合模型。研究了不同工况下端心、齿板、定子夹紧板和转子托环内的磁通密度、损耗和温度。通过热分析，确定了定子和转子端部的热点位置。研究了定子和转子端区热点温度随有功和无功功率变化的变化规律。ACEGM的功率调节范围由定子和转子端部元件的热极限决定。研究结果可为优化电机定子和转子端区结构，提高电机功率调节能力提供理论依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Industry Applications 工程技术-工程：电子与电气

CiteScore

9.90

自引率

9.10%

发文量

747

审稿时长

3.3 months

期刊介绍： The scope of the IEEE Transactions on Industry Applications includes all scope items of the IEEE Industry Applications Society, that is, the advancement of the theory and practice of electrical and electronic engineering in the development, design, manufacture, and application of electrical systems, apparatus, devices, and controls to the processes and equipment of industry and commerce; the promotion of safe, reliable, and economic installations; industry leadership in energy conservation and environmental, health, and safety issues; the creation of voluntary engineering standards and recommended practices; and the professional development of its membership.