A Study of a Fast Current Limiter Topology Based on Capacitive Commutation

For current conversion fault current limiters (FCL), the principle of current conversion and the interaction between the components determine the performance of the fault current limiter. In this paper, a fault current limiter topology based on capacitive discharge for transfer is designed. Firstly, the topology and working principle of the current limiter are analyzed. Secondly, the fault current limiter is theoretically analyzed to determine the feasibility of the current limiter. Simulation results show that a current limiting resistor of 20 ohms can limit the current to 500A. Finally, the simulation analysis of the current limiter is carried out to optimize the key parameters and verify the reliability of the current limiter function.