Section 16 Station communication16.1 Communication protocolsEach IED is provided with a communication interface, enabling it to connect to one ormany substation level systems or equipment, either on the Substation Automation (SA)bus or Substation Monitoring (SM) bus.Available communication protocols are:• IEC 61850-8-1 communication protocol• IEC 61850-9-2LE communication protocol• LON communication protocol• SPA or IEC 60870-5-103 communication protocol• DNP3.0 communication protocolSeveral protocols can be combined in the same IED.16.2 IEC 61850-8-1 communication protocol16.2.1 Application IEC 61850-8-1IEC 61850-8-1 communication protocol allows vertical communication to HSI clientsand allows horizontal communication between two or more intelligent electronic devices(IEDs) from one or several vendors to exchange information and to use it in theperformance of their functions and for correct co-operation.GOOSE (Generic Object Oriented Substation Event), which is a part of IEC 61850–8–1standard, allows the IEDs to communicate state and control information amongstthemselves, using a publish-subscribe mechanism. That is, upon detecting an event, theIED(s) use a multi-cast transmission to notify those devices that have registered to receivethe data. An IED can, by publishing a GOOSE message, report its status. It can alsorequest a control action to be directed at any device in the network.Figure 183 shows the topology of an IEC 61850–8–1 configuration. IEC 61850–8–1specifies only the interface to the substation LAN. The LAN itself is left to the systemintegrator.1MRK 505 337-UUS - Section 16Station communication435Application manual
