摘要
针对广州某火电厂励磁系统在主、备励切换过程中出现的无功波动大、机组发生失磁事故的问题,对并列可控硅整流、二极管整流的换流过程和备用励磁系统调压装置的机械特性进行了分析,提出了提高励磁系统主、备励切换可靠性的措施,有效地提高了励磁系统主备励切换的可靠性。
In the switching over operation process between main and stand by excitation systems of a thermal power plant in Guangzhou,the reactive power fluctuated greatly,and the excitation-loss accident of the unit was happened.Aiming at the above problems,the current switching process of parallel silicon controlled rectification and diode rectification was analyzed,and the mechanical characteristics of the voltage regulating device of the standby excitation system were analyzed too.The measures to increase the reliability of switching over operation between main and standby excitation systems were put forward,and the reliability of switching over operation between main and standby excitation systems was increased effectively.
出处
《华电技术》
CAS
2011年第8期32-33,36,共3页
HUADIAN TECHNOLOGY
关键词
励磁系统
主励
备励
AVR
可控硅整流
二极管整流
excitation system
main excitation
standby excitation
automatic voltage regulator(AVR)
silicon controlled rectification
diode rectification
