浅析主变高失灵联跳中低侧开关的再次失灵判别

为了确保母线故障,母差保护动作跳主变高压侧开关失灵后,能够快速的切除变压器各侧开关,一般都设有高压侧失灵联跳变压器各侧断路器功能。本文结合国网标准化设计,以CSC-326主变保护为例,简要分析了主变高压侧开关失灵后,经主变保护自身二次失灵判别出口,跳开主变各侧开关,从而达到防止失灵误动的情况。

Analysis on Discrimination of Failure Once More of Low Side Switch in Main Transformer High Voltage Failure Tripping

In order to ensure that each side transformer switch can be removed after the bus fault,main transformer hv side switch failure of differential bus protection movement jump,the function of each side circuit breaker of high voltage side failure league jump transformer is haven.Combining with the priorities of standardized design,taking CSC-326 main transformer protection as an example,this paper analyzes that after the main transformer hv side switch failure,through their second failure discriminant export of the main transformer protection,each side switch of the main transformer is tripped,so as to prevent the failure misoperation.