The security protection strategy for differential protection of 5G-based distribution network is discussed. Firstly
the architecture and implementation principle of differential protection of distribution network are given. Secondly
the security of 5G and 4G networks is compared and analyzed. Combined with the security challenges of 5G
the security protection requirements for 5G-based distribution network are analyzed
and then two security protection goals for differential protection of 5G-based distribution network with SA and NSA are proposed. Finally
the security risk points and countermeasures are given based on the data flow and boundary conditions of the differential protection. The results demonstrate that the proposed security protection strategy is effective.