1000MW机组发电机出口短路对扭振动力学响应分析  

Dynamic Response Analysis of 1000MW Generator Outlet Short-circuit Fault to Torsional Vibration

作　　者：潘宏刚 庞智元 王维东 肖增弘 李根稼 PAN Hong-gang;PANG Zhi-yuan;WANG Wei-dong;XIAO Zeng-hong;LI Gen-jia(School of Energy and Power,Shenyang Institute of Engineering,Shenyang 110136;Shenyang Blower Works Group Co.,Ltd.,110869;CEEIC Qingyuan New Energy Co.,Ltd.,Fushun 113319,Liaoning Province)

机构地区：[1]沈阳工程学院能源与动力学院,辽宁沈阳110136 [2]沈阳鼓风机集团股份有限公司,辽宁沈阳110869 [3]中能建投(清原)新能源有限公司,辽宁抚顺113319

出　　处：《沈阳工程学院学报（自然科学版）》2021年第4期10-13,共4页Journal of Shenyang Institute of Engineering:Natural Science

基　　金：中国博士后科学基金项目(2019M661125);辽宁省博士启动基金(20180540077);辽宁省教育厅科学研究经费项目(JL-2003);沈阳市科学技术计划项目(20-206-4-16);沈阳市中青年科技创新团队支持计划项目(RC190342)。

摘　　要：以某1000 MW机组为研究对象,对转子系统在发电机出口二、三相短路故障引发的电磁力矩冲击下产生的激励响应,进行瞬态动力学分析,提取对应分析时域内的等效应力响应曲线。分析结果表明,等效应力的第一响应峰在数值上与电磁冲击力矩大小呈正相关,且响应峰极值点相对于载荷曲线在时间上存在一定的滞后。二相短路和三相短路故障最大等效应力点均发生在低压转子与发电机转子的连接轴段,二相短路故障最大等效应力值明显高于三相短路故障最大等效应力值,等效应力集中位置在低压转子与发电机转子连接轴段凸肩结构根部,等效应力极大值点集中分布在转轴表面,并向轴心递减。Taking a 1000 MW unit as the research object,the excitation response of the rotor system under the impact of electromagnetic torque caused by the two-phase and three-phase short circuit fault at the generator outlet are analyzed,and the transient dynamic analysis is carried out,the equivalent stress response curves in time domain of correspondence analysis are extracted.It is concluded that the first response peak of the equivalent stress has a positive correlation with the magnitude of the electromagnetic impact torque,and there is a certain time lag between the response peak extreme point and the load curve.The location of the equivalent stress concentration is at the root of the shoulder structure of the shaft connecting the low-voltage rotor and the generator rotor,the maximum equivalent stress points occur at the connecting shaft surface of low-voltage rotor and generator rotor,and decreasing toward the shaft center.

关 键 词：1000MW 发电机出口 短路故障 扭振特性 响应分析 

分 类 号：TK26[动力工程及工程热物理—动力机械及工程]