采用不对称磁极优化水轮发电机空载电压波形  

No-load Voltage Waveform Optimization of Hydro-generator With Asymmetric Poles

作　　者：周光厚 韩力[2] 范镇南[3] 侯小全 廖毅刚 

机构地区：[1]东方电机有限公司研究试验中心,四川省德阳市618000 [2]重庆大学电气工程学院,重庆市沙坪坝区400044 [3]四川电力职业技术学院电气工程一系,四川省成都市610072

出　　处：《中国电机工程学报》2009年第15期67-73,共7页Proceedings of the CSEE

摘　　要：改善空载电压波形是发电机优化设计、保证电能质量的重要问题。采用极靴偏心与阻尼条偏心等不对称磁极结构设计方案,对一台45MW的大型水轮发电机空载电压波形进行优化设计,并利用二维运动电磁场场路耦合时步有限元模型,进行分析与计算。结果表明,合理偏移极靴和阻尼条位置,可以明显削弱齿谐波,改善气隙磁场分布和空载电压波形。计算结果与实测数据相吻合。研究成果已在3个电站的大型水轮发电机上得到工程实际应用。The improvement of no-load voltage waveform is an important problem for design optimization of generators and ensuring the quality of electric power. The no-load voltage waveforms of a 45 MW hydro-generator are optimized with the asymmetric poles design including the eccentricity of the pole shoes or/and the damper bars, and the optimization is implemented and analyzed by 2D moving electromagnetic field-circuit coupling model. The results show that the tooth harmonics are weakened obviously, the waveforms of the air gap magnetic field and the no-load voltage are improved when reasonable shifting the center of the pole shoes or/and the damper bars. The calculation results are coincident well with the test data. The research has been applied to 3 large hydro-generators operating at the power stations .

关 键 词：水轮发电机 空载电压波形 齿谐波 不对称磁极 电磁场 有限元 

分 类 号：TM312[电气工程—电机]