中国电机工程学报2017，Vol.37Issue(3)：898-906,9.DOI:10.13334/j.0258-8013.pcsee.160233
发电−电动机定子线棒启停过程中的热应力分析
Thermal Stress Analysis of Stator Bar in Generator-motor During Startup/Shutdown Process
陈金秀 1阮琳 1顾国彪1
作者信息
- 1. 中国科学院电工研究所,北京市海淀区 100190
- 折叠
摘要
Abstract
Generator-motor frequently starts up and shuts down, changes running conditions during daily operation, which generating frequent changing temperature and thermal stress. This working characteristic goes against safety reliability of generator-motor. As the temperature and thermal stress are directly related to cooling method of generator-motor, this paper used theoretical analysis method and finite element simulation method to analyze the temperature and thermal stress of stator bar in air-cooled and evaporative-cooled generator-motor when the electrical machine operate from stop state to rated status. To ensure the calculation precision, the real operation data of a 300MW generator-motor in China and the actual measuring material parameters of VPI insulation were chosen as input for the finite element simulation. The results show that if generator-motor is cooled by evaporative cooling technology, the temperature and thermal stress fluctuation of stator bar caused by load changing can be effectively reduced and the safe reliability of generator-motor can be effectively improved.关键词
发电-电动机/冷却方式/启停过程/热应力Key words
generator-motor/cooling method/startup/ shutdown process/thermal stress分类
信息技术与安全科学引用本文复制引用
陈金秀,阮琳,顾国彪..发电−电动机定子线棒启停过程中的热应力分析[J].中国电机工程学报,2017,37(3):898-906,9.
