Section 2 Introduction To Iec 61850 - ABB Relion Series 670 Manual

1MRK 511 349-UEN -
Section 2
670 series 2.1 IEC
Communication protocol manual
Introduction to IEC 61850
The general scope of the IEC 61850 protocol standard is designed to support the
communication of all functions being performed in the substation. Its' main goal is
interoperability; this is the ability for IEDs from one or different manufacturers to
exchange information and use the information for their own functions. Moreover, the
standard allows a free allocation of these functions and accepts any system
philosophy, from a distributed architecture (for example, decentralised substation
automation) to a centralised configuration (for example, RTU based).
The standard separates the functionality represented by the data model and the related
communication services from the communication implementation (stack).
The data model of the standard is an object-oriented one, grouping the data into the
smallest possible sets referring to the smallest possible functions to be implemented
independently. These smallest possible data groups or functions are named logical
nodes. The logical nodes and all data and attributes contained are named according to
a standardised semantic, which is mandatory.
This manual describes how the IEC61850 standard is applied in the IEDs. References
and brief descriptions of the standard are also included. It is assumed that the reader
has basic knowledge of the IEC 61850 standard.
The following parts of the IEC61850 standard are of importance as they relate to this
manual:
• Station Configuration description Language (SCL) is described in IEC 61850-6.
The SCL is an XML based definition of how to describe the parts of a substation.
This part of the standard also includes the roles of different tools as well as the
engineering concepts.
• Communication profile (IEC 61850 stack) is described in IEC 61850-8-1. This
part of the standard includes a number of possible communication profiles, and
how the services defined in IEC 61850-7-2 are mapped to the communication
profile.
• Communication services are described in IEC 61850-7-2. This part deals mainly
with the communication facilities from client and server point of view. It includes
the different possibilities of communication functionality.
• Logical node data model. This is described in IEC 61850-7-3 and IEC
61850-7-4.
• Conformance tests and the basis for conformance documents are handled in IEC
61850-10.
Detailed information regarding the IEC61850 implementation of the IED is described
inside the conformance documents.
Section 2
Introduction to IEC 61850
23