**5. Conclusions**

In this paper, the application feasibility of resistive-type superconducting fault current limiters in a hybrid high voltage direct current transmission system is verified. The main conclusions are as follows:


Concerning our future tasks, the optimization design, and economic evaluation of the superconducting fault current limiters will be done. Besides, the effects of the superconducting fault current limiters on the integration of large-scale renewable power sources into the hybrid system will be explored. These mentioned studies will be presented in the follow-up reports.

**Author Contributions:** L.C. helped design the study and write the manuscript; H.H. helped analyze the data; G.L. helped build the simulation model; H.C. helped conduct the study; L.W. helped analyze the HVDC model; X.C. helped conduct the device scheme; X.T. helped draw the figure; Y.X. helped conduct the simulation analysis; L.R. helped conduct the superconductor parameters; Y.T. helped edit the manuscript.

**Funding:** This research was funded by the Project of the SGCC under gran<sup>t</sup> number GYW17201700027, the National Natural Science Foundation of China under gran<sup>t</sup> number 51877154, 51507117, the Fundamental Research Funds for the Central Universities under gran<sup>t</sup> number 2042018kf0214, the State Key Laboratory of Advanced Electromagnetic Engineering and Technology under gran<sup>t</sup> number AEET 2018KF004.

**Acknowledgments:** The authors gratefully acknowledge financial support from the Project of the SGCC (GYW17201700027), the National Natural Science Foundation of China (51877154, 51507117), the Fundamental Research Funds for the Central Universities (2042018kf0214), the State Key Laboratory of Advanced Electromagnetic Engineering and Technology (AEET 2018KF004).

**Conflicts of Interest:** The authors declare no conflict of interest.
