Suspension Performance and Fault-Tolerance Principle of High-Speed Permanent Magnet Synchronous Generator

IF 5.4 2区工程技术 Q2 ENERGY & FUELS IEEE Transactions on Energy Conversion Pub Date : 2025-03-04 DOI:10.1109/TEC.2025.3545758

Hongbo Qiu;Huaiyuan Zhang;Zexing Li;Xi Huang;Dongxue Fu;Cunxiang Yang

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Abstract

The unbalanced magnetic pull (UMP) caused by inter-turn short circuit (ITSC) can cause serious damage to wrap-around high-speed permanent magnet synchronous generators (HSPMSG). In order to solve this problem and further improve the reliability of the generator operation, the new method that transform the UMP into suspension force in fault-tolerant operation by the correction winding is proposed, and a stable suspension force can be also provided by the method during generator normal operation. Firstly, based on the winding structure of the wrap-around HSPMSG, the UMP caused by ITSC fault is calculated, and the key factors affecting the UMP are determined. Secondly, a mathematical correction model for the UMP is established, the principle of the UMP being transformed into suspension force is revealed, and the relationship between the UMP and the suspension force is clarified. The effect of the suspension force on bearing life is further analyzed, the results show that the suspension force can offset 86.5% of the gravity of the rotor and significantly improve the bearing life. Finally, the ITSC fault experiment and the correction experiment of prototype are carried out, and the effectiveness of the correction winding in fault-tolerant operation is verified.

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高速永磁同步发电机的悬挂性能及容错原理

匝间短路引起的不平衡磁拉力（UMP）会对绕线式高速永磁同步发电机（HSPMSG）造成严重损坏。为了解决这一问题，进一步提高发电机运行的可靠性，提出了在容错运行时通过纠偏绕组将UMP转换为悬挂力的新方法，该方法还可以在发电机正常运行时提供稳定的悬挂力。首先，基于绕线式高压高压电机的绕线结构，计算了ITSC故障引起的UMP，确定了影响UMP的关键因素；其次，建立了UMP的数学修正模型，揭示了UMP转化为悬架力的原理，明确了UMP与悬架力之间的关系；进一步分析了悬浮力对轴承寿命的影响，结果表明，悬浮力可以抵消转子86.5%的重力，显著提高轴承寿命。最后，进行了ITSC故障实验和样机校正实验，验证了校正绕组在容错运行中的有效性。

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 Energy Conversion 工程技术-工程：电子与电气

CiteScore

11.10

自引率

10.20%

发文量

230

审稿时长

4.2 months

期刊介绍： The IEEE Transactions on Energy Conversion includes in its venue the research, development, design, application, construction, installation, operation, analysis and control of electric power generating and energy storage equipment (along with conventional, cogeneration, nuclear, distributed or renewable sources, central station and grid connection). The scope also includes electromechanical energy conversion, electric machinery, devices, systems and facilities for the safe, reliable, and economic generation and utilization of electrical energy for general industrial, commercial, public, and domestic consumption of electrical energy.