具备故障限流功能的中高压快速切换开关

Middle-to-high Fast Switch With Fault-current-limiting Function

固态切换开关(SSTS)是城市供电保障的关键装备,为解决现有SSTS装备存在的问题,此处提出一种新颖的具备故障限流功能的中高压固态切换开关装置(FCL-SSTS),其能够实现双路电源的快速切换和短路故障限流的双重功能。当主供电回路电压出现暂降或短时中断时,FCL-SSTS可实现备用供电回路的快速切换。当负荷侧出现短路故障时,FCL-SSTS可以快速实现故障限流功能,从而避免故障的扩大化,FCL-SSTS结构对装置的自我保护以及电力系统的安全可靠运行具有重要意义。

Solid state transfer switch(SSTS)is a vital equipment to guarantee reliable power supply in cities.To solve the issues of existing SSTS,a novel middle-to-high voltage fault-current-limiting SSTS(FCL-SSTS)is proposed,which can realize fast switching between dual power sources and limit the short current.When the voltage sag or temporary fault occurs on primary power source,FCL-SSTS can switch to backup power source immediately.When the short circuit fault happens on load,FCL-SSTS can quickly limit short current and constrain further impact,FCL-SSTS has significant importance for its protection to electric assets and safe and reliable operation of power systems.