| Abstract |
In this paper, two new hCB concepts for DC-grids are presented, which use a pulse current to extinguish the arc in the mechanical switch after opening. Both concepts are capable to adjust the pulse current amplitude/waveform to the fault current amplitude and so generate a slow current slope di/dt directly before the zero current crossing without large passive components for a fast and reliable fault clearing. By improving the controllability of the hCB and with a new control concept the capacitor volume of the first concept could be reduced by 60\% and the inductor volume by 88\% compared to the existing solution. At the cost of more active components, the capacitor volume could be even more reduced by 98.4\% compared to the first concept (99.4\% compared to the existing solution). |
