大型水轮发电机空载电压波形的分析计算与试验研究

• 作 者: 周光厚 刘传坤 杨勇
• 出 处: 东方电机
• 发表日期: 2009年02期
• 关键词: 大型水轮发电机 波形 电磁场 阻尼绕组 空载电压 铁心饱和 谐波 时步 同步发电机 二维运动

本文介绍了大型水轮发电机空载电压波形的有限元计算方法,运用二维运动电磁场时步有限元模型与电路耦合模型,综合考虑铁心饱和、转子旋转、阻尼绕组端环及阻尼条涡流等多种因素影响,对840MVA水轮发电机空载电压波形及谐波进行了有限元计算和真机试验,并将计算结果与解析法和试验结果进行了比较,结果表明,本文的计算结果更为精确,该方法对大型水轮发电机空载电压波形及谐波的精确计算具有重要价值。

This paper introduces the finite element method of no-load voltage waveform of large hydroelectric generator. By using two-dimensional moving electromagnetic field time-step finite element model and circuit coupling model, considering the core saturation, rotor rotation, damping ring and damper ring Various factors influence the no-load voltage waveform and harmonics of the 840MVA hydroelectric generator under finite element analysis and real machine test. The calculated results are compared with the analytical and experimental results. The results show that the calculation results of this paper are more To be exact, this method is of great value to the accurate calculation of no-load voltage waveform and harmonic of large hydroelectric generator.