Based on an analysis of the smart grid's demand on the smart substation automation system

a novel scheme for the smart substation automation system is proposed. The vertically integrated bay device is applied to reducing the realization chain for protection and control functions to improve the system reliability and maintainability. The parallel redundancy protocol is used to improve the reliability and standardization for information transmission. Service oriented technology is also applied to improving information sharing and coordinated interaction level between substation and control center. The system architecture and key technologies are elaborated. Finally

some key issues in promotional applications of the system are discussed in detail. This work is supported by State Grid Corporation of China.