Abstract: The purpose of this project is to improve the reliability and intelligent management level of the power supply in the low-voltage station area, and realize the interconnection between two stations and multiple stations. Through data analysis, the pressure difference between the two phases of the transformer and the correctness of the phase sequence connection logic were quickly judged. A connection box was added between the two stations, TTU control busbar switch was equipped, low voltage outlet switch was modified, and the function of distribution transformer backup was optimized. Thermal conductivity technology was used to realize non-sensing interconnection in low voltage stations. This technology not only improves the accuracy and efficiency of fault detection and provides data support for subsequent maintenance and management, but also reduces the power outage time of users, improves the reliability of power supply, and improves the satisfaction of users on power supply services.