摘要
介绍了大型发电机变压器组装置的几项保护新原理,包括发电机工频变化量比率差动、变斜率比率差动、异步法TA饱和判别、电流比率制动匝间保护等。这些保护新原理的应用,在保证高可靠性的前提下,提高了内部故障保护的灵敏度,完善了保护方案。
This article introduces the new principles of digital proctection for generator transformer unit,including deviation of power frequency (DPFC) percentage differential relay, variable slope percentage differential relay, asynchronous method of TA saturation recognition, current percentage restricted stator inter-turn relay, etc. The application of these new principles improves the sensitivity and reliability of internal fault protection, and perfects the scheme of generator transformer protection.
出处
《华中电力》
2005年第2期30-32,35,共4页
Central China Electric Power
关键词
发电机变压器组
比率差动
变斜率
工频变化量
异步法TA饱和判别
generator transformer unit
percentage differential protection
variable slope
deviation of power frequency (DPFC)
asynchronous method of TA saturation
