A review on protection of DC microgrids

The DC microgrid has become a typical distribution network due to its excellent performance. However,a well-designed protection scheme still remains a challenge for DC microgrids. At present, researches on DC microgrids primarily focus on the topology structure, control method and energy control, while researches on fault analysis, detection and isolation have not drawn enough attention. Therefore, this paper intends to depict the current research status in different relative areas and review the proposed protection strategies in order to help researchers have a clear understanding on DC microgrid protection.Meanwhile, to solve the protection issues and promote the development of the DC microgrids, this paper points out the key areas of future researches. The future protection researchdirections lie in the development of novel protection devices, which are based on electronic technology to provide loose protection constraints and the improvement of suitable protection schemes. In addition, the novel concept of coordinated control and protection strategy in the DCmicrogrids is explained.