Protection and measuring-control devices in smart substation

Smart substation is divided into system layer and equipment layer.System layer equals to the station level of digital substation.Equipment layer is composed of HV equipment,intelligent component and IED,equaling to the bay layer and process level of digital substation.Intelligent component results from the merging of the primary and secondary equipments.As a part of the intelligent component,protection and measuring-control devices are oriented to the bay.IED is modeled based on IEC61850.Modularization concept,object-oriented technology and PLC technology are used in device program design.The reliability of network communication is ensured by reliable network topology and redundancy technology.Device modeling,FB(Function Block) and LN(Logical Node) design,networks and key technologies,config tools and config steps,virtual terminal,and test method are introduced.