Abstract: By adopting the approach of "monitoring the distribution network through the substation network and replacing passive monitoring with active monitoring," the system actively incorporates the substation network's D5000 signals to address the issue of delayed initiation in distribution network fault detection. It replaces the traditional passive monitoring of distribution network status with active monitoring of distribution network status to solve the problem of incomplete and untimely transmission of distribution network status information. The system also introduces active monitoring of distribution network status to replace the traditional passive monitoring, addressing the issue of incomplete and untimely transmission of distribution network status information. Additionally, it replaces the traditional distribution network status information transmission with active monitoring of distribution network status to solve the problem of incomplete and untimely transmission of distribution network status information.