Hybrid Circuit Breaker for HVDC Grids with Controllable Pulse Current Shape for Fast Fault Clearing

Abstract

This poster presents two new hybrid Circuit Breaker (hCB) with current injection circuit to extinguish the arc in the MCB after opening. Compared to other hCBs, this hCBs uses a current injection circuit, which is able to adapt the pulse current and so ensures a low current slope at the arc extinction to prohibit a reignition. Additionally, it is shown that with the increased controllability the volume of the passive components can be decreased compared to existing solutions.