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Figure 3.
Example of the IEC 61850
data model used throughout the paper.
The IEC 61850 standard provides the representation of an IEC 61850 system config-
uration of electrical devices, including representation of data and communication ser-
vices, using an XML-based file format called Substation Configuration Language (SCL).
The SCL file is divided into sections, each of which provides different information. The
header section includes general topics and details about SCL and the file version. The IED
section describes devices capacities, functions, and data it manages, and provides a de-
scription of the Logical Devices, Logical Nodes, and Data Objects present in the system.
The DataTypeTemplates section describes the data model by defining the Logical Node
Types, the Data Object Types, the Data Attribute Types, and the Enumeration Types used.
The communication section contains communication details. The substation section de-
scribes electrical topology for substation or any other electrical process.
The IED Capability Description (ICD) file is a specific type of Substation Configura-
tion Language (SCL) file, containing a generic description of the whole capability range
of a given device, including the functions and objects it can support. The ICD file is usually
supplied by the developer/manufacturer.
IEC 61850 standardizes the set of abstract communication services that allows the
compatible exchange of information among components of a Power Utility Automation
System. IEC 61850 offers several types of communication models, including the Cli-
ent/Server type communication services model [15]. An IEC 61850 Server may be used to
maintain, and make its content available to, IEC 61850 Clients, in terms of data structured
according to the IEC 61850 data model shown by Figures 1 and 2. An ICD file is always
available in the IEC 61850 Server to describe its full content.
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