Design and Application of 160 kV 1 kA Resistive Type Superconducting DC Current Limiter

As a new type of fault current suppressing device, resistive type superconducting current limiter (R-SFLC) has been studied by many researchers. However, there is no relevant study of R-SFCL on system design, application, and relevant impact analysis in the scenario of multilevel converter-based multi-terminal high voltage DC transmission (MMC-MTDC) system. Accordingly, this paper summarized the design and application of 160 kV 1 kA R-SFCL in the practical Nan’ao MMC-MTDC project, including the following parts: (1) the impact analysis of R-SFCL on DC side short-circuit current suppression in MMC-MTDC system; (2) online iterative calculation method for R-SFCL quenching resistance based on R−Q curve; (3) parameter design and prototype structure development of R-SFCL prototype; (4) system control and protection scheme for Nan’ao MMC-MTDC project with the developed R-SFCL device. Finally, the correctness and effectiveness of the above research and development are verified through the artificial single-pole short-circuit filed test with the developed R-SFCL in the Nan’ao MMC-MTDC project. © 2022 Science Press. All rights reserved.