Resistive superconducting current limiter can limit short circuit current quickly and is therefore often used in combination with DC circuit breakers to break DC faults. There is a complex coupling relationship between the performance of the superconducting current limiter and the component parameters of the DC circuit breaker. The type selection of the superconducting current limiter under certain parameters of DC circuit breaker component is in urgent need of research. In this paper

the existing superconducting current limiter resistance model is analyzed firstly. Then

the short circuit fault when the superconducting current limiter is used in combination with a DC circuit breaker is simulated and the variation of the superconducting current limiter resistance and current is analyzed. The simulation results show that the superconducting current limiter can successfully limit the rise of the fault current and help the DC circuit breaker to break the fault current. There is a complex coupling relationship among the resistance

temperature and current waveform of the superconducting current limiter. Finally

the cross-section of the superconducting tape is fixed

and the length of the superconducting current limiter is optimized by the multi-objective particle swarm algorithm. The results before and after the optimization show that when the length of the superconducting tape is 47 m

the peak of the short circuit current is 1.24 kA

and the current zero is generated at 5.90 ms

which is 7 m less than that of the superconducting tape before the optimization

but the peak of the short-circuit current and zero-crossing time remain almost unchanged.