大接地电流系统中变压器间隙保护的应用

Application of transformer gap protection in the power system with grounded neutral

通过对大接地电流系统脱离主网后的接地故障情况及断线和非同期合闸造成的非全相运行的分析,阐述了大接地电流系统脱离主网和非全相运行时,造成变压器中性点电压位移而带来的危害,提出了主变间隙保护在大接地电流系统中的应用及建议。

This paper analyses the non-complete phase operation caused by the conditions of fault grounding, breakdown and asyehronous switch-in after direct grouuded neutral system breaks away from the main nets. It is dangerous of neutral voltage displacement of transformer when non-complete phase operation. Main transformer＇s gap protection is proposed to be employed in power system with direct grounded neutral.