Abstract
Smart substation is the intelligent node of the smart grid, which plays a fundamental part in the construction of the smart grid. This paper presents the concept and the technical characteristics of the smart substation and some important aspects in the development of Substation Automation System (SAS): the meaning, technical characteristics and the development of IEC61850 which is the international and the best standard for the construction of SAS; different Substation Communication (SC) architecture to ensure the reliability, availability and survivability of the geographically distributed complex power; the characteristics of Non Conventional Instrument Transformer(NCIT), the Intelligent Switchgear as well as their implement.
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