3ω定子接地保护误动原因分析和对策OA北大核心CSCD
REASON AND COUNTERMEASURES OF MALOPERATION OF GENERATOR STATOR GROUND PROTECTION BASED ON THE THIRD HARMONIC
由于5号发电机及主变之间装有SF6开关，定子接地保护在发电机启动和解列时经常误动。经查明,导致上述现象的原因是机组分布电容参数发生了变化。文中利用开关辅助接点投退该保护,但最根本的还是从保护整定方法和保护程序入手解决了该问题。
Maloperation of generator stator ground protection based on thethird harmonic in Manwan Hydropower Plant has occurred many times during generator starting and generator tripping. Through testing the same operating conditions as maloperation, the reason resulting in maloperation has been found that the capacitance at the generator terminal is changed too large. This paper also proposes some countermeasures for this purpose.
唐清弟;谭建华
漫湾发电厂， 云南云县 675805漫湾发电厂， 云南云县 675805
信息技术与安全科学
3ω定子接地保护误动试验对策
《电力系统自动化》 2001 (1)
59-61,3
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