一种用超快速接地开关对开关柜内部电弧故障保护的方法

New Approach to Protect Against Internal Arcing Fault of Distribution Switchgear Panels by Using Ultra-fast Earth Switch

为了解决目前因内部电弧故障影响整套开关柜退出运行的状况,提高供电可靠性,文中设计了一种开关柜内部电弧故障的保护方法。它是利用超快速接地开关快速接地来转移开关柜内部故障电弧电流,同时利用超快速接地开关在300 ms内完成合闸和分闸操作,熄灭电弧并减轻因电弧对柜内绝缘和元件的损坏,这样可以让开关柜母线上的断路器完成重合闸操作,恢复供电。这种设计可以在不改变现有断路器标准操作循环的基础上,极大地提高供电可靠性。

To solve the common sult in DSP out of service and to troduced in this paper in which ground through UFES close and insulation and elements design can improve the circuit breaker. damage problem of which the internal fault arc of distribution switchgear panels （DSP）re- improve the power supply reliability, a new protection system is designed and in- the ultra-fast earth switch（UFES）is used to transfer the fault arcing current into open itself within 300 ms, to extinguish fault arc in DSP and to relief the internal of DSP, thus achieving the re-closing function of main-bus circuit breaker. This power supply reliability dramatically without change existing standard operation cycle of