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Figure 2: Structure and parts of the IEC 61850 standard
The IEC 61850 standard specifies an expandable object-oriented data model and wide
set of protocol services for substation automation (standard parts 7-x). The standard
does not specify any protection or control functions, but specifies how the functions
expose their information to a communication network.
The standard supports free allocation of functions to devices. With efficient
communication facilities, the functions can be located anywhere in the system, that is,
an interlocking function can reside in the IED or on the station level. Additionally, the
standard is open for different system implementations, that is, different integration
levels and allocation of functions to different devices is supported.
The standard also defines an XML description language for substation automation
systems. The language facilitates efficient integration of devices into systems in an
automated fashion. Additionally the standard supports a comprehensive and
consistent system definition and engineering, which makes not only the devices, but
also their tools and systems interoperable (standard part 6).
The standard uses Ethernet and TCP/IP for communication. Since Ethernet and TCP/
IP are widely accepted and used, the application of these technologies provide a broad
range of features from mainstream communication (standard parts 8-1,
9-2).Communication profiles in IEC 61850 can be divided to vertical and horizontal.
The vertical profile uses MMS over TCP/IP and vertical communication Layer 2
Ethernet multicast messages. The standard separates the functionality represented by
the data model and the related communication services from the communication
implementation thus being open for possible new communication concepts in the
future.
Section 2 1MRS757809 C
IEC 61850 overview
10 REC615 and RER615
Engineering Guide
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