| 引用本文: | 何玉灵,雷欢,张文,王晓龙,陶文强,白洁.三维气隙偏心对同步发电机转子铁芯温度特性的影响[J].电力自动化设备,2021,41(7): |
| HE Yuling,LEI Huan,ZHANG Wen,WANG Xiaolong,TAO Wenqiang,BAI Jie.Impact of three-dimensional air gap eccentricity on rotor core temperature of synchronous generator[J].Electric Power Automation Equipment,2021,41(7): |
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| 摘要: |
| 对同步发电机正常运行、气隙径向偏心、气隙轴向偏心及气隙轴向-径向复合偏心故障前后转子铁芯的损耗和温度的变化进行分析。首先对正常运行以及3种气隙偏心故障下的磁滞损耗和涡流损耗进行了解析，推导得到了各工况对应的损耗表达式；然后建立了CS-5型发电机的三维有限元模型，计算得到了不同工况下转子铁芯的损耗和温度变化数据。研究发现：气隙径向偏心故障下，转子铁芯的温度高于正常情况，随着偏心量的增加，损耗与温度均呈现升高趋势；气隙轴向偏心故障下，转子铁芯的损耗和温度将低于正常情况，偏移量的增加会使损耗和温度均呈现下降趋势；气隙轴向-径向复合偏心故障下，转子铁芯的损耗和温度相对正常情况变化较小，但整体仍呈现升高趋势。最后对CS-5型故障模拟发电机进行仿真和实验，仿真和实验结果与理论分析结论基本一致。 |
| 关键词: 同步发电机 三维气隙静偏心 损耗 转子铁芯温度 |
| DOI：10.16081/j.epae.202103009 |
| 分类号:TM31 |
| 基金项目:国家自然科学基金资助项目(51777074)；中央高校基本科研业务费专项资金资助项目(2020MS114,2018YQ03)；河北省自然科学基金资助项目(E2020502032)；河北省第三批青年拔尖人才支持计划([2018]-27) |
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| Impact of three-dimensional air gap eccentricity on rotor core temperature of synchronous generator |
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HE Yuling, LEI Huan, ZHANG Wen, WANG Xiaolong, TAO Wenqiang, BAI Jie
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Department of Mechanical Engineering, North China Electric Power University, Baoding 071003, China
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| Abstract: |
| The variations of temperature and loss of the rotor core before and after the radial air gap eccentricity, the axial air gap eccentricity, and the axial-radial hybrid air gap eccentricity of synchronous generator are analyzed. Firstly, the hysteresis loss and the eddy current loss under normal condition and three kinds of air gap eccentricity fault are analyzed, and the detailed expressions corresponding to each working condition are derived. Then the three-dimensional finite element model of CS-5 generator is established. The magnetic field and temperature field distribution of rotor core under different working conditions are calculated. It is shown that the temperature of the rotor core under air gap radial eccentricity fault is higher than that under normal conditions. With the increase of the radial eccentricity degree, both of the temperature and loss of the rotor core increase. The temperature and loss of the rotor core under air gap axial eccentricity fault is lower than those under normal conditions, and the severer the air gap axial eccentricity fault is, the more the temperature and loss decrease. Under the axial-radial hybrid eccentricity fault, the temperature and loss of the rotor core change little compared with the normal situation, but the overall trend is still increasing. Finally, experiment and simulation are carried out on the CS-5 prototype generator, the simulative and experimental results are basically the same as the theoretical analysis. |
| Key words: synchronous generators three-dimensional static air gap eccentricity loss temperature of rotor core |
