电工技术学报  2016, Vol. 31 Issue (11): 91-96    DOI:
电机与电器 |
汽轮发电机三相突然短路故障转子动态电磁力计算
梁艳萍,于鸿浩,边旭
哈尔滨理工大学电气与电子工程学院 哈尔滨 150080
Calculation of Dynamic Electromagnetic Force in the Rotor of Turbogenerator after Three-Phase Sudden Short Circuit Fault
Liang Yanping Yu Honghao Bian Xu
School of Electrical and Electronic Engineering Harbin University of Science and TechnologyHarbin 150080China
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摘要 三相突然短路是汽轮发电机的严重故障之一,对转子造成很大的电磁冲击力,甚至引起机械疲劳的转子表面龟裂。因此,掌握三相突然短路时汽轮发电机转子铁心电磁力的分布特点并找出电磁力集中的位置是优化设计转子铁心结构的重要前提。首先建立了汽轮发电机三相突然短路的场-路耦合仿真模型,然后以一台600 MW汽轮发电机为例,计算了三相突然短路过程,最后获得了转子齿顶和转子齿壁上电磁力的分布与动态变化规律,并与额定工况进行对比,找到了电磁力集中的位置。该研究为汽轮发电机转子铁心结构的优化设计提供了理论参考。
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关键词 汽轮发电机三相突然短路动态电磁力麦克斯韦应力法有限元法    
Abstract:The three-phase sudden short circuit fault is one of the most serious faults of turbogenerators. The rotor may be shocked by the electromagnetic force and even the mechanical-fatigue rotor’s outside surface may have cracks because of the fault. Therefore, it is an important premise of the turbogenerator’s rotor optimization design to know the distribution of the rotor electromagnetic force and the location in which the electromagnetic force concentration appears. In this paper, the field-circuit coupled simulation model of the three-phase sudden short circuit fault of the turbogenerator is firstly established. Secondly, a 600 MW turbogenerator is taken as an example, and its three-phase sudden short circuit process is calculated. Finally, the distribution and the dynamic change of the electromagnetic force on the top and side walls of the rotor teeth are obtained and compared with those in the rated condition. The position of the electromagnetic force is found. The study in this paper provides the basis of the optimization design of the turbogenerator rotor structure.
Key wordsTurbogenerator    three-phase sudden short circuit    dynamic electromagnetic force    Maxwell stress method    finite-element method   
收稿日期: 2015-02-24      出版日期: 2016-07-12
PACS: TM341  
基金资助:国家自然科学基金(51477038)和黑龙江省自然科学基金(E2015061)资助项目。
通讯作者: 于鸿浩 男,1987年生,博士,研究方向为电机电磁场数值计算。E-mail:645077526@qq.com   
作者简介: 梁艳萍 女,1963年生,教授,博士生导师,研究方向为电机电磁场数值计算。E-mail:lyanping2012@163.com
引用本文:   
梁艳萍,于鸿浩,边旭. 汽轮发电机三相突然短路故障转子动态电磁力计算[J]. 电工技术学报, 2016, 31(11): 91-96. Liang Yanping Yu Honghao Bian Xu. Calculation of Dynamic Electromagnetic Force in the Rotor of Turbogenerator after Three-Phase Sudden Short Circuit Fault. Transactions of China Electrotechnical Society, 2016, 31(11): 91-96.
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