Actively serving the State Grid's "dual carbon" process and accelerating the digital transformation of the grid, Dongfang Electronics Corporation has innovatively proposed a digital station terminal architecture and high-protection design for ring main units, launching a domestic digital high-protection environmentally friendly gas-insulated ring main unit. This utilizes local digital technology to enhance the reliability, compactness, and green low-carbon features of the ring main unit. The digital terminal adopts a domestic hardware and software platform, with the main control unit equipped with an 8-inch color touch screen, and the digital sensing unit being CPU-free and maintenance-free. It features 5G-based differential protection and intelligent distributed functions, fiber-based differential protection, and a self-developed adaptive strategy for small current grounding fault detection, with a single-phase grounding fault judgment accuracy exceeding 90%.
