Building group low-voltage flexible DC power distribution system

The invention discloses a building group low-voltage flexible DC power distribution system, which relates to the technical field of current and voltage and comprises a current limiting module, an overvoltage and insulation matching module, an equipment transient current module and a comprehensive coordination protection module. According to the system, when a fault occurs, the current limiting module limits the surge current, the DC circuit breaker module cooperates with the related current limiter module to safely and reliably realize the breaking and isolation of the fault, and the resistance type superconducting current limiter inhibits the impact current and protects the current limiting reactor module and the lightning arrester module according to the number of building groups. The lightning arrester module is used for protecting electrical equipment in the system, and the comprehensive coordination protection module carries out comprehensive coordination protection on the current limiting module, the ov