中南大学学报（自然科学版）2017，Vol.48Issue(8)：2034-2043,10.DOI:10.11817/j.issn.1672-7207.2017.08.010
同步发电机偏心与绕组短路故障对磁场及电磁振动的影响
Effect of rotor eccentricity and stator short circuit faults on magnetic field and electromagnetic vibration characteristics of synchronous generator
摘要
Abstract
The magnetic field,electromagnetic force and vibration of a 6 MW synchronous generator were researched in cases of the rotor static eccentricity fault,the stator inter short circuit fault and the composite fault,respectively.The traditional calculation method based on the equivalent networks was invalid in the case of the inner asymmetric magnetic field.The finite element model of the generator was established and the variation characteristics of air-gap magnetic field in different fault types were analyzed based on the results of transient magnetic fields.Meanwhile,the change of electromagnetic force affected by corresponding fault parameters was studied under different operating conditions.The electromagnetic forces were taken as load condition,and curves of vibration displacement of the generator were obtained.The influences of different faults were analyzed qualitatively by comparing the curves of rated condition with that of faults.The results show that the radial vibration signal of generators can be used to detected air-gap eccentricity and winding faults.关键词
同步发电机/气隙静态偏心/定子匝间短路/径向电磁力/电磁振动Key words
synchronous generator/static air-gap eccentricity/stator inter short circuit/radial electromagnetic force/electromagnetic vibration分类
信息技术与安全科学引用本文复制引用
谢颖,刘海东,李飞,刘海松..同步发电机偏心与绕组短路故障对磁场及电磁振动的影响[J].中南大学学报（自然科学版）,2017,48(8):2034-2043,10.基金项目
国家自然科学基金资助项目(51107022) （51107022）
黑龙江省杰出青年科学基金资助项目(JC2016010) （JC2016010）
哈尔滨市科技创新人才研究专项资金(青年后备人才)资助项目(RC2014QN007005)(Project (51107022) supported by the National Natural Science Foundation of China （青年后备人才）
Project(JC2016010) supported by the Heilongjiang Province Science Fund for Distinguished Young Scholars （JC2016010）
Projeet(RC2014QN007005)supported by Program for Scientific& Technological Innovation Talents in Harbin) （RC2014QN007005）
