Research on Protection for the Flexible Substation

The equipment composition, networking form and functional characteristics of the flexible substation are different from the conventional substation and intelligent substation, and its protection has special characteristics. Based on the project of flexible substation, this paper proposes a three-layer protection system framework of in-situ protection, substation-area protection and wide-area protection for flexible substation, and analyzes the basic performance of protection reliability, selectivity and speed. The research results show that the proposed flexible substation protection system framework is reasonable and feasible, and it can be used as reference for the future design of the protection system structure in the smart grid and global energy Internet construction.