IEC 61850-5:2003

INTERNATIONAL IEC
STANDARD
61850-5
First edition
2003-07
Communication networks and systems
in substations –
Part 5:
Communication requirements
for functions and device models
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INTERNATIONAL IEC
STANDARD
61850-5
First edition
2003-07
Communication networks and systems
in substations –
Part 5:
Communication requirements
for functions and device models
 IEC 2003  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
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– 2 – 61850-5  IEC:2003(E)
CONTENTS
FOREWORD . 6
INTRODUCTION .8
1 Scope . 9
2 Normative references. 9
3 Terms and definitions .10
4 Abbreviations.13
5 Substation automation system functions .14
5.1 Introduction .14
5.2 Logical allocation of functions and interfaces.14
5.3 The physical allocation of functions and interfaces .16
5.4 The role of interfaces.16
6 Goal and requirements .17
6.1 Interoperability.17
6.2 Static design requirements .17
6.3 Dynamic interaction requirements.17
6.4 Response behavior requirements.18
6.5 Approach to interoperability .18
6.6 Conformance test requirements .18
7 Rules for function definition .18
7.1 Function description .19
7.2 Logical Node description .19
7.3 PICOM description.19
8 Categories of functions .19
8.1 System support functions.19
8.2 System configuration or maintenance functions .19
8.3 Operational or control functions .20
8.4 Local process automation functions .20
8.5 Distributed automatic support functions .20
8.6 Distributed process automation functions.20
9 The logical node concept .20
9.1 Logical nodes and logical connections .20
9.2 The need for a formal system description .21
9.3 Requirements for logical node behavior .22
9.4 Examples for decomposition of common functions into logical nodes .22
10 The PICOM concept.23
10.1 Attributes of PICOMS .24
10.2 PICOMs and data models .25
11 List of logical nodes .25
11.1 Logical Nodes for protection functions .26
11.2 Logical Nodes for control .31
11.3 Physical device.34
11.4 System and device security .34
11.5 LNs related to primary equipment .34
11.6 LNs related to system services .37

61850-5  IEC:2003(E) – 3 –
12 The application of LN (informative) .37
12.1 Basic principles .37
12.2 Basic examples .38
12.3 Additional examples.39
12.4 Remarks on modeling .42
13 Message performance requirements .43
13.1 Introduction .43
13.2 Basic time requirements .43
13.3 Event time definition .44
13.4 Transfer time definition .44
13.5 The introduction and use of message types .45
13.6 The introduction and use of performance classes .45
13.7 Message types and performance classes.46
14 Requirements for data integrity.49
15 System performance requirements.49
15.1 Introduction .49
15.2 Calculation methods .50
15.3 Calculation results .51
15.4 Summary .51
16 Additional requirements for the data model .52
16.1 Requirements for the addressing of logical nodes.52
16.2 Requirements for the data model .52
Annex A (informative) Logical nodes and related PICOMs.53
Annex B (informative) PICOM identification and message classification .67
Annex C (informative) Communication optimization.74
Annex D (informative) Rules for function definition .75
Annex E (informative) Interaction of functions and logical nodes .77
Annex F (informative) Categories of functions .78
Annex G (informative) Functions .80
Annex H (informative) Results from the function description.105
Annex I (informative) Performance calculations.111
Annex J (informative) Examples for protection functions in compensated networks .129
Bibliography.131
Figure 1 – Relative position of this part of the IEC 61850 series. 8
Figure 2 – Levels and logical interfaces in substation automation systems.15
Figure 3 – The logical node and link concept.21
Figure 4 – Examples of the application of the logical node concept .23
Figure 5 – Protection function consisting of 3 logical nodes.25
Figure 6 – The basic communication links of a logical node of main protection type .29
Figure 7 – Decomposition of functions into interacting LNs on different levels: examples
for generic automatic function, breaker control function and voltage control function.38

– 4 – 61850-5  IEC:2003(E)
Figure 8 – Decomposition of functions into interacting LN on different levels:
examples for generic function with telecontrol interface, protection function
and measuring/metering function .38
Figure 9 – Example for control and protection LNs of a transformer bay combined in
one physical device (some kind of maximum allocation) .39
Figure 10 – Example for interaction of LNs for switchgear control, interlocking,
synchrocheck, autoreclosure and protection.39
Figure 11 – Example for sequential interacting of LNs (local and remote) for a complex
function such as point-on-wave switching – Sequence view .40
Figure 12 – Example for functional interacting of LNs (local and remote) for a complex
function such as point-on-wave switching – Architecture view .40
Figure 13 – Example for automatic tap changer control for voltage regulation .41
Figure 14 – Circuit breaker controllable per phase (one instance of XCBR per phase)
and instrument transformers with measuring units per phase (one instance of TCTR or
TVTR per phase).41
Figure 15 – Distributed busbar protection (LN instances of PBDF for central unit and
for units per bay - left) and interlocking (LN instance of CILO) on bay level per
switch/circuit breaker (right) .
...