摘要
350 MW发电机机组低压减载功能使用6 kV高压转机综合保护装置的附带功能,未使用6 kV母线电压互感器屏专用综合保护装置低压减载功能,两种方式都能满足低压减载功能,但使用前者在处理电压互感器断线事件时存在一定风险,处理不当有引发低电压减载动作的可能,使高压转机跳闸,进而引发机组跳闸事故。功能优化后的低电压减载功能系统简单集中,处理电压互感器断线缺陷简单、省时,有效避免低电压减载保护误动,引发机组跳闸非计划停机。
The low voltage deloading function of 350 MW generator unit adopted the supplementary function in the integrated protection device of6 kv high -voltage transfer , instead of low voltage deloading function of special comprehensive protection device in the 6 kv bus voltage transformer screen .Both implementations can satisfy the function of low voltage deloading , but they are used in the treatment of the voltage transformer disconnection events when there is a certain risk , improper han-dling with low electricity may reduce load action , make high pressure transit trip , causing the unit trip accident .Low elec-tricity reduce load function after function optimization system is simple , and save time , voltage transformer disconnection defect effectively avoid low electricity reduce load protection misoperation ,trigger unit trip planned downtime .
出处
《甘肃冶金》
2014年第3期50-52,共3页
Gansu Metallurgy
关键词
低电压减载
电压回路断线
机组跳闸
reduce low electricity load
voltage circuit break line
tripping unit
