Overview the Development of Technologies in Smart Substation of China

Smart substation is the tendency of the evolutionary substation in the future and is one key parts of smart grid. The Technical guide for smart substation is published by State Gird Corporation of China for the construction of smart substation. This paper recounts the differences from substation and smart substation, describes the system architecture of smart substation, characteristic of smart equipment and monitors the status of smart equipment. Base on the automation and communication technology, it research on the applications of smart equipment and information technology in smart substation of China. Finally, it prospects the application of smart substation.