In the face of the challenges brought by safe and stable operation of the power supply and distribution network with a high proportion of distributed energy, CYG SUNRI has worked out a “5G-based differential/intelligent distributed” power distribution automation solution with high power supply reliability, which was applied to the projects in Henan’s Kaifeng, Guangzhou’s Nansha, Shenzhen’s Qianhai and other areas in 2022. This solution adopts fast bus, peer-to-peer communication, variable sampling rate, ultra-low flow and other technologies, can realize ms-level rapid and accurate isolation and second-level intelligent transfer of faults under various complex grids, and comprehensively facilitate the construction of new power systems.