简介:摘要:断路器是电力系统中重要一次设备。当系统故障时,断路器可靠地切断故障电流,有效隔离正常设备和故障点,从而保障电力系统的安全稳定。若断路器出现失效问题,在故障时断路器将无法可靠跳闸,会多次“分合闸”,使一次设备(断路器、变压器等)遭受数次故障电流的冲击,造成断路器遮断能力下降、变压器绕组变形、系统失去稳定等情况,若在直流受端发生多次故障将会造成双极闭锁,恶化系统的安全稳定运行,为此需要强化对断路器失效问题的管控,保证发生故障时能可靠断开断路器。基于此,文章首先分析了漏电断路器的工作原理,然后分析了其失效原因,最后对断路器的失效预警系统进行了研究,以供参考。
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