CAJ | 학술논문

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。
350 MW발전궤궤조저압감재공능사용6 kV고압전궤종합보호장치적부대공능，미사용6 kV모선전압호감기병전용종합보호장치저압감재공능，량충방식도능만족저압감재공능，단사용전자재처리전압호감기단선사건시존재일정풍험，처리불당유인발저전압감재동작적가능，사고압전궤도갑，진이인발궤조도갑사고。공능우화후적저전압감재공능계통간단집중，처리전압호감기단선결함간단、성시，유효피면저전압감재보호오동，인발궤조도갑비계화정궤。
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 .