Abstract
Medium voltage direct current (MVDC) shipboard power system (SPS) is the development trend of future ships. With the characteristics of compact structure and high-power density, the short circuit is much more serious than land-based power system, which seriously restricts the development of MVDC SPS. Therefore, there is an urgent need for prospective research on fault-protection. According to the fault characteristics of MVDC SPS, a DC superconducting current-limiting switch (SCLS) is proposed, so as to realize the current limiting protection of MVDC SPS. In this paper, a small-scale SCLS superconducting coil is wound, and a current limiting experiment of the prototype is completed. The results show that SCLS has a fast current-limiting response speed and a good current-limiting effect. The experiment summarizes the characteristics of the two current limiting modes of SCLS and it is concluded that R-type current limiting mode is more suitable for MVDC SPS.
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