For example, ABB's Smart Substation Control and Protection device SSC600 consolidates the functions of over 30 individual protection relays into a single digital solution, simplifying engineering, increasing flexibility, and cutting lifecycle costs by up to 15%. Substations are critical nexus points in the power grid, transforming high-voltage electricity to ensure its safe and efficient delivery from power plants to millions of end-users. At the core of a modern substation lies the protection relay: an intelligent electronic device (IED) that plays a. To achieve information sharing and interoperability among intelligent electrical equipment in intelligent substations, the author proposes research on relay protection and security technology for the expansion project of intelligent substations. Taking the 500 kVA intelligent substation in Shenzhen. Then, due to the particularity of historical statistical data, a weight calculation method combining analytical hierarchy process (AHP) and entropy weight method is adopted to eliminate subjective factors in the weight calculation process. Beyond these metrics, intelligent. Traditional protection relays, once the backbone of substation safety, are being superseded by more advanced, software-defined alternatives.
