Introduction of an Active Triggered Liquid Metal Fault Current-limiting Method

Abstract

The limitation of fault current in the DC system is an urgent but difficult problem. An active triggered liquid metal fault current-limiting method is proposed based on an external trigger circuit to ignite the arc in the current-through channel to realize the current limitation. Besides, the test setup as well as method is adopted to verify its limiting property of this new triggered method. It indicates that the new method can response quickly in case of a fault and ignites the arc to limit the current. Finally, the non-linear relationship between the arc properties and current density is mathematically revealed and discussed.