Section 21 Station communication
21.1 Communication protocols
Each IED is provided with several communication interfaces enabling it to connect to one
or many 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
• LON communication protocol
• SPA communication protocol
• IEC 60870-5-103 communication protocol
• DNP 3.0 communication protocol
• C37.118 communication protocol
Several protocols can be combined in the same IED.
21.2 IEC 61850-8-1 communication protocol
21.2.1 Application IEC 61850-8-1
IEC 61850-8-1 communication protocol allows vertical communication to HSI clients
and allows horizontal communication between two or more intelligent electronic devices
(IEDs) from one or several vendors to exchange information and to use it in the
performance of their functions and 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 a publish-subscribe mechanism. That is, upon detecting an event, the
IED(s) use a multi-cast transmission to notify those devices that have registered to receive
the data. An IED can, by publishing a GOOSE message, report its status. It can also
request a control action to be directed at any device in the network.
Figure
405 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 the system
integrator.
1MRK 506 369-UUS - Section 21
Station communication
Line distance protection REL670 2.2 ANSI 863
Application manual
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