燃气轮机启动过程对发电机差动保护的影响

Influence of Gas Turbine Start-up on Generator Differential Protection

燃气轮发电机组配置的保护基本与同容量的汽轮机组配置的保护相同,但还要根据燃汽轮机组启动过程中具有的特征及影响,增设相应的保护和对有影响的保护采取适当的措施以保证其正常运行。本文就燃气轮发电机组的启动方式及特征和对发电机差动保护的影响进行阐述,最后得出:燃气轮机启动过程中,发电机差动保护仍是定子绕组内部和引线的相间短路的主保护,但有不足,可以增设低频过流保护加以弥补。

In The protection of the gas turbine generator set is basically the same as that of the same ca- pacity steam turbine configuration. But based on the characteristics and effects of the start-up process of the steam turbine, adding additional protection and affecting the protection to take appropriate measures to ensure its normal operation. The following describes the starting mode and characteristics of the gas turbine generator set and the influence on the differential protection of the generator, Finally, it is concluded that the differential protection of the generator is still the main protection of the inter-phase short circuit be- tween the stator windings and the lead wire during the start-up of the gas turbine, but there is insufficient to add the low-frequency overcurrent protection to make up.