Analysis of Operating Characteristics of a Superconducting Arc-Induction Type DC Circuit Breaker Using the Maxwell Program

The direct current (DC) grid range is rapidly expanding according to the increase of power generation capacity for the DC demands. In order to stably operate the DC grid system, we need a suitable DC circuit breaker for DC characteristics. We propose the superconducting arc-induction type DC circuit breaker. Lorentz’s force is occurred by the strong magnetic field is occurring by the superconducting magnet and the arc is occurring by the between Anode and Cathode. If we exactly control that, the efficiency of the arc-induction can be higher. In this paper, the electric field and according to the cut-off operation of the superconducting arc-induction type DC circuit breaker were analyzed. It is very important because the electric field and Lorentz force are an indicator for confirming the movement of the arc caused by the opening contacts. As a result, we confirmed that the Lorentz force calculated from the FEM showed a maximum increase ratio of 1101 times.