摘要
为了深入研究大型贯流式水轮发电机阻尼绕组的损耗和发热规律,建立了发电机二维电磁场和转子三维温度场有限元模型,考虑了电磁场时变、运动、非线性等因素对损耗的影响以及转子铁芯各向异性导热性能和磁极迎风面、背风面散热性能差异对发热的影响。在此基础上,以东方电机股份有限公司生产的36 MW贯流式水轮发电机为例,针对不同工况、结构和材料,对阻尼绕组的损耗和温度进行了综合计算和对比分析,并与实测数据进行了比较。结果表明,该模型计算精度高,发电机设计合理,研究结论对探讨大型贯流式水轮发电机阻尼绕组的损耗发热规律、改进其设计、提高发电机与电网的运行可靠性具有参考价值。
To research the losses and heat of damper winding thoroughly,a 2D electromagnetic field model of tubular hydro-generator and a 3D temperature field model of the rotor are established by the finite element method.The factors such as time-varying,moving and nonlinearity of the electromagnetic field,the anisotropy heat conduction of the rotor core and different head dissipation of the pole windward,and lee side of the temperature field are considered.Furthermore,according to different operating conditions,structures,and materials,the losses and temperatures of the damper winding in a 36MW tubular hydro-generator manufactured by Dongfang Electrical Machinery Company Limited are comprehensively calculated and analyzed,and the data are compared with the test ones.The results show that the computation precision is satisfied and the generator design is reasonable.The research is favorable for discovering the rules of the losses and heat of damper winding,improving its design,and enhancing the operation reliability of the large hydro-generator and electric network.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2011年第2期468-475,共8页
High Voltage Engineering
基金
输配电装备及系统安全与新技术国家重点实验室自主研究项目(2007DA10512709203)
重庆市自然科学基金(CSTC
2008BB6163)
中央高校基本科研业务费(CDJXS11151152)~~
关键词
贯流式水轮发电机
阻尼绕组
电磁场
温度场
有限元
损耗
发热
tubular hydro-generator
damper winding
electromagnetic field
temperature field
finite element
losses
heat
