A resistive type superconducting current limiter can automatically and quickly limit the short-circuit current. An artificial zero-crossing type vacuum DC circuit breaker has the advantages of low equipment cost and fast action speed. Therefore

a combination of the two technologies may perfectly meet the requirements of flexible direct current transmission. The objective of this paper is to propose a superconducting current-limiting type vacuum DC interrupting technology

and to verify its feasibility. Firstly

the principle of the proposed DC interrupting is analyzed. Then

a 10 kV/10 kA prototype is designed. Finally

DC current breaking tests are carried out with a 10 kV LC current source. The prospective current peak is 10 kA. The experimental results show that the superconducting current-limiting module can limit the short-circuit current from 10 kA to 1.4 kA

then the series connected artificial zero-crossing type DC breaking module interrupts the limited current within 12 ms. The superconducting current-limiting module has the following merits: effectively limiting the short-circuit current

absorbing the energy stored in the inductance of the system

suppressing the switching overvoltage

and effectively clearing DC short circuit faults with improving the breaking reliability. Moreover

the amplitude of the short-circuit current after current limiting is low

and the value of the required interrupting current is also small

which is beneficial to reducing the parameters and size of the DC breaking module and making the device structure more compact.