CAJ | 학술논문

对一起发电机出口断路器失灵保护误动事故进行了论述和分析,提出了现有发电机断路器失灵保护中的电流判据会导致保护拒动的问题,分析了小电流接地系统单相接地及相间短路等故障时,断路器失灵保护电流判据无法起动的原因,对改进发电机断路器失灵保护判据提出了采用有流判据及增加电压等判据的建议。
대일기발전궤출구단로기실령보호오동사고진행료논술화분석,제출료현유발전궤단로기실령보호중적전류판거회도치보호거동적문제,분석료소전류접지계통단상접지급상간단로등고장시,단로기실령보호전류판거무법기동적원인,대개진발전궤단로기실령보호판거제출료채용유류판거급증가전압등판거적건의。
This paper discussed and analyzed a mal-operation of generator circuit breaker failure protection, brought out the issues that existed in the current criteria which may lead to protection failure. By analyzing the single phase-to-ground fault and phase-to-phase fault in small current earthing system.To determine the reason that cause incapable pick up of overcurrent element, thus to put forward some suggests to improve the criteria for generator circuit breaker failure protection.