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Coupling vibration characteristics of stator-winding system in synchronous generators

Dianji yu Kongzhi Xuebao/Electric Machines and control 2024年第11期28卷 12-24页

作者： Xu, Mingxing He, Yuling Zhang, Wen Dai, Derui Fu, Zixiang Wan, Shuting Hebei Engineering Research Center for Advanced Manufacturing and Intelligent Operation and Maintenance of Electric Power Machinery North China Electric Power University Baoding071000 China Baoding Key Laboratory of Intelligent Measurement and Control and Industrial Interconnection Hebei Software Institute Baoding071000 China

Regarding the issues of synchronous generator stator-winding system coupling vibration, the research focuses on the first and second forced coupling vibration characteristics of the generator stator-winding system. Firstly, the mechanical analytical model of the generator core and winding system was established, and the stator core magnetic pull force analytical expression and stator winding electromagnetic force analytical expression were derived to analyze the excitation characteristics of the two kinds of loads and their mutual coupling characteristics, as well as the vibration response characteristics of the stator core and stator winding. Then, a three-dimensional global model of the generator was established in finite element simulation software and the mechanical-electrical-magnetic multi-field coupling simulation was carried out, and the load excitation data and mechanical response data of the stator core and the winding were obtained. Finally, the first forced vibration, second forced vibration and first and second forced coupled vibration characteristics of the windings subjected to in the YC - 3 type first and second forced vibration coupling experimental set were verified. It is shown that the stator-winding system excitation and its first and second forced vibrations during generator operation are both coupled and additive. The coupled excitation / coupled vibration of the end winding mainly consists of DC component and 2nd frequency component, and the amplitude of DC component and 2nd frequency component is larger than that of the single excitation only. © 2024 Editorial Department of Electric Machines and control. All rights reserved.

关键词： Synchronous generators

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