| 大型水轮发电机铁芯磁阻对单个线圈电感计算的影响 |
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| 引用本文： | 诸嘉慧,邱阿瑞,孙宇光.大型水轮发电机铁芯磁阻对单个线圈电感计算的影响[J].清华大学学报(自然科学版),2007,47(4):486-489. |
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| 作者姓名： | 诸嘉慧 邱阿瑞 孙宇光 |
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| 作者单位： | 清华大学,电机工程与应用电子技术系,电力系统及大型发电设备安全控制与仿真国家重点实验室,北京,100084 |
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| 摘 要： | 针对大型发电机铁芯磁阻对线圈电感计算的影响较难定量分析的问题,分别采用磁路法和磁场法计算大型水轮发电机单个线圈的电感参数。对2种方法计算结果的比较表明:磁路法根据基波主磁路对铁芯磁阻的近似折算对单个线圈的电感计算产生一定误差。尤其对于大型发电机,因其极数多,槽数多,不同磁路中铁芯磁位降的差异较大,如果铁芯还存在饱和现象,铁芯磁阻的影响将会更大。这时要准确计算电感参数,最好采用磁场分析法,这能更加准确地考虑发电机定、转子铁芯磁阻及饱和的影响。
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| 关 键 词： | 大型水轮发电机 铁芯磁阻 电感 磁路分析法 有限元分析法 |
| 文章编号： | 1000-0054(2007)04-0486-04 |
| 修稿时间： | 2006年2月18日 |
Effects of core magnetic reluctance on inductance calculations for a single coil in a large hydro-generator |
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| ZHU Jiahui,QIU Arui,SUN Yuguang.Effects of core magnetic reluctance on inductance calculations for a single coil in a large hydro-generator[J].Journal of Tsinghua University(Science and Technology),2007,47(4):486-489. |
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| Authors: | ZHU Jiahui QIU Arui SUN Yuguang |
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| Abstract: | The effects of the core magnetic reluctance in winding inductance calculations was quantified using the magnetic circuit analysis method and the finite element method to calculate the self and mutual inductances of a single coil in a large hydro-generator.Comparison of the results from the two methods shows that the model of the core magnetic reluctance in the magnetic circuit analysis method,which is based on the fundamental magnetic circuit,leads to errors in the predicted inductances.Especially for large generators with many poles and slots and clearly different magnetic potential drops in the various magnetic circuits,the finite element method should be used to calculate the inductances to accurately include the effects of core magnetic reluctance and saturation in the stator and the rotor. |
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| Keywords: | large hydro-generator core magnetic reluctance inductance magnetic circuit analysis method finite element method |
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