Section 14 Station communication14.1 Communication protocols M14815-3 v12Each IED is provided with a communication interface, enabling it to connect to one or manysubstation level systems or equipment, either on the Substation Automation (SA) bus orSubstation Monitoring (SM) bus.Available communication protocols are:• IEC 61850-8-1 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.14.2 IEC 61850-8-1 communication protocol IP14616-1 v214.2.1 Application IEC 61850-8-1 IP14865-1 v2M13912-3 v4IEC 61850-8-1 communication protocol allows vertical communication to HSI clients and allowshorizontal communication between two or more intelligent electronic devices (IEDs) from oneor several vendors to exchange information and to use it in the performance of their functionsand for correct co-operation.GOOSE (Generic Object Oriented Substation Event), which is a part of IEC 61850–8–1 standard,allows the IEDs to communicate state and control information amongst themselves, using apublish-subscribe mechanism. That is, upon detecting an event, the IED(s) use a multi-casttransmission to notify those devices that have registered to receive the data. An IED can, bypublishing a GOOSE message, report its status. It can also request a control action to bedirected at any device in the network.M13913-3 v5Figure85 shows the topology of an IEC 61850–8–1 configuration. IEC 61850–8–1 specifies only theinterface to the substation LAN. The LAN itself is left to the system integrator.1MRK 505 355-UEN A Section 14Station communication225Application manual
