电工技术学报2012，Vol.27Issue(10)：120-127,8.
转子绕组短路故障时发电机转子不平衡电磁力分析
Analysis on Rotor Unbalanced Electromagnetic Force of Generator under Rotor Interturn Short Circuit Fault
摘要
Abstract
The rotor winding turn-to-turn short circuit fault is one of the main electrical faults of turbo-generators,which can cause the rotor vibration,and greatly affect the security of the generator and the power system.In this paper,firstly,the magnetomotive force superposition method of the unbalanced electromagnetic force acting on the rotor is proposed,and the equivalent magnetic flux method is improved.Then the rotor interturn short circuit fault of a QFR—400—2—20 type generator in a power plant is investigated,and the value of the unbalanced electromagnetic force is respectively calculated by the equivalent magnetic flux method and the magnetomotive force superposition method.The result shows that when the interturn short circuit turns are near the Q-axis,the unbalanced electromagnetic force that obtained by the equivalent magnetic flux method is larger than the value that calculated by the magnetomotive force superposition method because the former method doesnot consider the effect of the interturn short circuit position on the unbalanced electromagnetic force.关键词
发电机/转子绕组短路/不平衡电磁力/等效磁通计算方法/磁动势叠加计算方法Key words
Generator/rotor interturn short circuit/unbalanced electromagnetic force/equivalent magnetic flux method/magnetomotive force superposition method分类
信息技术与安全科学引用本文复制引用
周国伟,李永刚,万书亭,张玉,李和明..转子绕组短路故障时发电机转子不平衡电磁力分析[J].电工技术学报,2012,27(10):120-127,8.基金项目
国家自然科学基金 （）
河北省自然科学基金（E2011502024）资助项目 （）
