【作者】 戈宝军； 张鹏鹏；

【Author】 GE Baojun;ZHANG Pengpeng;Harbin University of Science and Technology;

【机构】 哈尔滨理工大学；

【摘要】 大型同步发电机机端发生不对称短路故障时,会产生强大的冲击电流及电磁力,对机组危害非常严重。本文以1250MW核用半速汽轮发电机为研究对象,通过建立发电机二维电磁场—电路耦合时步有限元模型,对发电机空载运行时单相接地短路、两相接地短路、相间短路等不同的短路种类进行仿真计算,分析研究了电机内部各电气量的变化情况。更多还原

【Abstract】 For the large synchronous generator,it will has a strong impact current and electromagnetic force when it short-circuit suddenly on generator terminal,the harming to the generator was very serious.This paper takes 1250 WM steam turbine generator at half speed as the research object,through the establishment of the generator 2D electromagnetic field- circuit coupled finite element model,different sudden short-circuit of terminal were simulated,including single-phase grounding short circuit,two phase grounding short circuit and phase fault when the generator no-load operation,and then analyze the changing of the electrical parameters for the generator.更多还原