The goal of the IEC 61850 standard
Interoperability
The ability for IED’s from one or several
manufacturer to exchange information and use
the information for the their own functions.
Free Configuration The standard shall support different philosophies
and allow a free allocation of functions e.g. it will
work equally well for centralized (RTU like) or
decentralized (SCS like) systems.
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Long Term Stability The standard shall be future proof, i.e.
it must be able to follow the progress in
communication technology as well as
evolving system requirements.
The Contents of IEC 61850
System Aspects
Part 1: Introduction and
Overview
Part 2: Glossary
Part 3: General Requirements
Part 4: System and Project
Management
Part 5: Comm Requirements
for Functions and
Device Models
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Configuration
Part 6: Configuration Language for electrical
Substation IED’s
Testing
Part 10: Conform. Testing
State: August 2002
Data Models
Basic Communication Structure for
Substations and Feeder Equipment
Part 7-4: Compatible Logical Node Classes and
Data Classes
Part 7-3: Common Data Classes
Abstract Comm. Services
Basic Communication Structure for
Substations and Feeder Equipment
Part 7-2: Abstract Communication Services (ACSI)
Part 7-1: Principles and Models
Mapping to real Comm. Networks (SCSM)
Part 8-1: Mapping to MMS
Part 9-1: Serial Unidirectional Multidrop Point-toPoint link
Part 9-2: Mapping on Ethernet based Process Bus
WD CD CDV FDIS IS
FDIS under preparation
The data model is process oriented...
Control
Q0/CSWI
Q8/CSWI
Q9/CSWI
Bay-HMI
IHMI
Earthing Switch
Q8_L1/XSWI
Gas density mon.
Q8_L1/SIMS
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Isolator
Q9_L1/XSWI
Gas density mon.
Q9_L1/SIMS
Circuit Breaker
Q0_L1/XCBR
Gas density mon.
Q0_L1/SIMS
Secondary
technology
Primary technology
Distance Protection
PDIS
IEC 61850 defines objects, data and services
The objects are the functions, that the user needs and knows from
everyday experience. They are called “Logical Nodes” in the standard.
For example XCBR with all defined data:
Circuit Breaker
XCBR
Local operation
Switch position
Operation capability
Operation counter
…
Mandatory and optional Data are associated with all objects
Access to object and data is standardized (Services)
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The Objects and Data are self describing
mandatory
mandatory
mandatory
optional
From function (application) to communication
Slow
Application
Domain
Substation
Long-term definition
Safe-guarding investments
Application
• Objects
•Services
Abstract Interface
Adaptation
per selected stack
Mapping
Fast
Communication
Technology
7
6
5
4
3
2
1
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ISO/OSI
seven layer stack
Stack Interface
MMS
TCP/IP
Ethernet
Stack selection
following state-of-art
Communication technology
Approach of
IEC61850
The Data model is mapped unambiguously to an existing stack