电工技术学报2018，Vol.33Issue(7)：1497-1507,11.DOI:10.19595/j.cnki.1000-6753.tces.170163
大型核电汽轮发电机定子内部短路故障时局部电磁力分布研究
Local Electromagnetic Force Distribution Study on Giant Nuclear Turbo-Generators with Stator Short-Circuit Fault
摘要
Abstract
The stator winding inter-turn short-circuit fault in nuclear power turbo-generator is one of the typical faults. It may cause rotor damage, slot wedges damage, windings fracture and some other serious problems. Therefore, it is important to know the distribution of electromagnetic force and the location in which the electromagnetic force concentration appears when the short circuit fault happens. First, a 2-D field-multi-loop circuit-motion coupled time-stepping finite element mathematical model for calculating the local electromagnetic force of giant nuclear power turbo-generator post-fault is presented, which combine the Maxwell stress and Lorentz formula. And then, a 1 407 MV·A nuclear turbo-generators is taken as an example, the radial and tangential force on rotor surface, the electromagnetic force on slot wall of stator and rotor, and the radial and tangential force on winding of stator and rotor under the giant nuclear power turbo-generator post-fault condition are calculated and analyzed. At the same time, the electromagnetic force distribution characteristics and relatively concentrated area in stator and rotor are achieved. Finally, the accuracy and rationality of calculation results are discussed. The research results of electromagnetic force in this paper can be applied to structure deformation analysis and fatigue analysis of the fault motor as a load. The proposed analysis idea for electromagnetic force can also provide a good reference for soling stator winding internal short-circuit fault, as well as other type motor.关键词
核电汽轮发电机/内部短路故障/二维场-多回路-运动耦合/电磁力Key words
Nuclear power turbo-generator/internal short-circuit fault/2-D field-multi-loop circuit-motion coupled/electromagnetic force分类
信息技术与安全科学引用本文复制引用
赵洪森,戈宝军,陶大军,吕品,辛鹏..大型核电汽轮发电机定子内部短路故障时局部电磁力分布研究[J].电工技术学报,2018,33(7):1497-1507,11.基金项目
国家自然科学基金(51407050)、国家重大科技专项(2009ZX06004-013-04-01)、黑龙江省博士后基金(LBH-Z15033)和黑龙江省青年科学基金(QC2016066)资助项目. （51407050）
