Section 18 Station communication18.1 Communication protocols M14815-3 v14Each IED is provided with several communication interfaces enabling it to connectto one or many substation level systems or equipment, either on the SubstationAutomation (SA) bus or Substation Monitoring (SM) bus.Available communication protocols are:• IEC 61850-8-1 communication protocol• IEC/UCA 61850-9-2LE communication protocol• LON communication protocol• SPA communication protocol• IEC 60870-5-103 communication protocolSeveral protocols can be combined in the same IED.18.2 IEC 61850-8-1 communication protocol IP14616-1 v218.2.1 Application IEC 61850-8-1 IP14865-1 v2M13912-3 v4IEC 61850-8-1 communication protocol allows vertical communication to HSIclients and allows horizontal communication between two or more intelligentelectronic devices (IEDs) from one or several vendors to exchange information andto use it in the performance of their functions and for correct co-operation.GOOSE (Generic Object Oriented Substation Event), which is a part of IEC61850–8–1 standard, allows the IEDs to communicate state and controlinformation amongst themselves, using a publish-subscribe mechanism. That is,upon detecting an event, the IED(s) use a multi-cast transmission to notify thosedevices that have registered to receive the data. An IED can, by publishing aGOOSE message, report its status. It can also request a control action to be directedat any device in the network.M13913-3 v6Figure 147 shows the topology of an IEC 61850–8–1 configuration. IEC 61850–8–1 specifies only the interface to the substation LAN. The LAN itself is left to thesystem integrator.1MRK 505 393-UEN B Section 18Station communicationLine differential protection RED650 2.2 IEC 361Application manual
