IEC TR 62357-1:2012

IEC/TR 62357-1
®

Edition 1.0 2012-10
TECHNICAL
REPORT

colour
inside


Power systems management and associated information exchange –
Part 1: Reference architecture

IEC/TR 62357-1:2012(E)

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IEC/TR 62357-1

®


Edition 1.0 2012-10




TECHNICAL



REPORT








colour

inside










Power systems management and associated information exchange –

Part 1: Reference architecture




























INTERNATIONAL

ELECTROTECHNICAL

COMMISSION

PRICE CODE
XE


ICS 33.200 ISBN 978-2-83220-445-0



  Warning! Make sure that you obtained this publication from an authorized distributor.


® Registered trademark of the International Electrotechnical Commission

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– 2 – TR 62357-1 © IEC:2012(E)
CONTENTS
FOREWORD . 7
INTRODUCTION . 9
0.1 General . 9
0.2 Objectives and overview of this technical report . 9
0.3 Rationale . 10
0.4 Trend toward model driven architectures and integration . 10
0.5 Purpose of the reference architecture . 11
0.6 Scope of reference architecture . 11
0.7 Purpose of the future reference architecture for power system information
exchange. 17
1 Overview . 18
1.1 Scope . 18
1.2 Normative references . 18
2 Abbreviations . 18
3 IEC TC 57 standards . 21
3.1 General . 21
3.2 IEC 60870-5 telecontrol protocol standards from WG3 . 22
3.3 IEC 60870-6 standards from WG7 . 22
3.4 IEC 61334 standards from WG9 . 23
3.4.1 General . 23
3.4.2 Relation to "external" standards . 23
3.5 IEC 61850 standards for power system IEC communication and associated

data models from WG10 . 24
3.5.1 General . 24
3.5.2 Substation architecture and interface specifications. 24
3.5.3 Substation configuration description language . 25
3.6 IEC 61970 energy management system application program interface
standards from WG13 . 26
3.6.1 General . 26
3.6.2 Common information model (CIM) . 26
3.6.3 Component interface specifications (CIS) for information exchange . 27
3.6.4 IEC 61970 standards as an integration framework . 27
3.7 IEC 61968 system interfaces for distribution management standards from
WG14 . 28
3.8 IEC 62351 standards for data and communications security from WG15 . 30
3.8.1 General . 30
3.8.2 Security for TCP/IP-based profiles . 31
3.8.3 Security for MMS ISO 9506 . 31
3.8.4 Security for IEC 60870-5 and derivatives . 31
3.8.5 Security for IEC 61850 peer-to-peer profiles . 32
3.8.6 Management Information Base (MIB) requirements for end-to-end
network management . 32
3.9 IEC 62325 standards for a framework for deregulated energy market
communications from WG16 . 34
3.10 IEC 61850 standards for communications systems for Distributed Energy
Resources (DER) from WG17 . 36

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TR 62357-1 © IEC:2012(E) – 3 –
3.10.1 General . 36
3.10.2 Need for communications with DER systems . 36
3.10.3 IEC 61850-7-420 . 37
3.10.4 IEC 61850-90-7 DER inverter object models . 38
3.11 IEC 61850 standards for hydroelectric power plants from WG18 . 39
3.11.1 General . 39
3.11.2 Basic concepts for hydropower plant control and supervision . 40
3.11.3 Principles for water control in a river system . 41
3.11.4 Principles for electrical control of a hydropower plant . 41
3.12 WG19 harmonization . 42
3.13 IEC 62488 standards for power line communication systems for power utility
applications from WG20 . 42
3.14 Interfaces and protocol profiles relevant to systems connected to the
electrical grid from WG21 . 42
4 Current reference architecture . 42
4.1 General . 42
4.2 Overview . 43
4.3 SCADA interfaces . 45
4.3.1 General . 45
4.3.2 Data transformation via gateways and adapters . 46
4.3.3 Harmonization of the data models . 47
4.4 Inter-control centre data links . 47
4.5 EMS applications. 47
4.6 DMS applications and external IT applications. 48
4.6.1 General . 48
4.6.2 Substation/field devices . 48
5 Abstract modelling in TC 57 . 48
5.1 General . 48
5.2 Common Information Model (CIM) and Component Interface Specifications
(CIS) . 49
5.2.1 CIM . 49
5.2.2 CIM classes and relationships . 53
5.2.3 CIS . 55
5.2.4 Interface Reference Model (IRM) . 55
5.3 IEC 61850 data modelling, ACSI and SCL . 55
5.3.1 General . 55
5.3.2 IEC 61850 ACSI . 57
5.3.3 SCL modelling language . 58
5.4 TASE.2. 61
5.5 Data modelling techniques used . 61
5.5.1 IEC 61850 series . 61
5.5.2 IEC 61968 series, IEC 61970 series . 61
5.6 Service model techniques used . 62
5.6.1 IEC 61850 series . 62
5.6.2 IEC 61968 series . 62
5.6.3 IEC 61970 series . 63
5.7 Reconciling CIM and IEC 61850 standards via a harmonized model . 63
5.7.1 General . 63
5.7.2 Use cases and interfaces . 64

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– 4 – TR 62357-1 © IEC:2012(E)
5.7.3 Summary of harmonized model reconciliation recommendations . 64
6 Technology mappings for TC 57 standards . 69
6.1 General . 69
6.2 Use of XML . 70
6.2.1 General . 70
6.2.2 IEC 61850 SCL use of XML . 70
6.2.3 IEC 61968 and IEC 61970 XML based on the CIM . 72
6.2.4 Reconciling the use of XML . 72
7 Strategic use of reference architecture for harmonization and new work items. 73
7.1 General . 73
7.2 Use of common object modelling language and rules . 73
7.3 Harmonization at model boundaries . 73
7.4 Resolution of model differences . 74
7.5 Basis of a future vision for TC 57 . 74
7.6 Process of starting new work in TC 57 . 74
8 Future reference architecture for power system information exchange . 75
8.1 General . 75
8.2 Vision statement . 75
8.3 Fundamental architecture principles . 75
8.4 Strategy . 76
8.4.1 General . 76
8.4.2 Information model . 76
8.4.3 Business context . 77
8.4.4 Interfaces . 77
8.4.5 Service model . 77
8.4.6 Industry trends to consider . 77
8.4.7 User awareness and usability . 79
8.4.8 CIM modelling technology and language strategy . 79
8.5 Vision for the next generation of CIM and related standards . 82
8.5.1 General . 82
8.5.2 Information layer . 83
8.5.3 Contextual layer . 84
8.5.4 Message assembly layer . 84
8.5.5 Exchange schema layer . 85
8.5.6 Concrete messages and the four layer architecture . 85
8.5.7 Next steps . 87
8.6 IEC 61850 standards strategy . 87
8.6.1 General . 87
8.6.2 Seamless profile concept . 87
9 Conclusion . 88
10 Acknowledgements . 88
Annex A (informative) Object models and mappings within TC 57 . 89
Annex B (informative) Comparison of circuit-breaker models within TC 57 . 91
Annex C (informative) Strategic vision from the Intelligrid architecture . 103
Annex D (informative) CIM/IEC 61850 mapping recommendations . 108
Bibliography . 110

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TR 62357-1 © IEC:2012(E) – 5 –
Figure 1 – Application of TC 57 standards to a power system . 14
Figure 2 – TC 57 organization and formal liaisons . 15
Figure 3 – Communication interface architecture for IEC 61850 . 25
Figure 4 – EMS-API standards as an integration framework . 28
Figure 5 – Distribution management system with IEC 61968 compliant interface
architecture. 29
Figure 6 – IEC 61968 Interface Reference Model (IRM) . 30
Figure 7 – Interrelationship of IEC 62351 security standards and the TC 57 protocols . 31
Figure 8 – Management of two infrastructures . 33
Figure 9 – Information infrastructure underlying power infrastructure . 33
Figure 10 – Framework for deregulated energy market communications . 34
Figure 11 – Energy market communication over the Internet . 35
Figure 12 – DER interactions in electric power system operations . 37
Figure 13 – DER management interactions . 39
Figure 14 – Structure of a hydropower plant . 40
Figure 15 – Current reference architecture for power system information exchange . 44
Figure 16 – SCADA data interfaces . 46
Figure 17 – Common Information Model (CIM) top-level packages . 50
Figure 18 – IEC 61970 CIM packages . 51
Figure 19 – IEC 61968 CIM packages . 52
Figure 20 – IEC 62325 CIM packages . 53
Figure 21 – IEC 61850 data modelling . 56
Figure 22 – ACSI client/server model . 57
Figure 23 – Use of SCL files to exchange IED configuration data . 58
Figure 24 – SCL object model . 60
Figure 25 – Proposed changes to the substation equipment UML model . 65
Figure 26 – Proposed linkage of IEC 61850 classes to CIM PSR classes in UML . 66
Figure 27 – Overview of SCL schema . 70
Figure 28 – Vision for next generation CIM and related standards . 82
Figure 29 – Role of architecture layers in message payload definition. 86
Figure B.1 – IEC 61970 CIM model for a circuit-breaker . 92
Figure B.2 – Simple network example with two breakers . 93
Figure B.3 – Simple network connectivity modelled with CIM topology . 93
Figure B.4 – CIM model for location of breaker as electrical device and the physical
asset performing the device’s role. 94
Figure B.5 – Top of asset hierarchy . 95
Figure B.6 – Types of document relationships inherited by all assets . 96
Figure B.7 – Activity records associated with a circuit-breaker . 97
Figure B.8 – Single line view of circuit-breaker . 100
Figure B.9 – Communications and IEC view . 101
Figure C.1 – Power system and information infrastructures . 105

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Table 1 – CIM and IEC 61850 naming attributes . 69
Table A.1 – TC 57 object models . 89
Table A.2 – Service capabilities of IEC 61850, TASE.2, and the verbs of IEC 61968 . 90

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TR 62357-1 © IEC:2012(E) – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

POWER SYSTEMS MANAGEMENT AND ASSOCIATED
INFORMATION EXCHANGE –

Part 1: Reference architecture


FOREWORD
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The main task of IEC technical committees is to prepare International Standards. However, a
technical committee may propose the publication of a technical report when it has collected
data of a different kind from that which is normally published as an International Standard, for
example "state of the art".
IEC 62357-1, which is a technical report, has been prepared by IEC technical committee 57:
Power systems management and associated information exchange.
This first edition cancels and replaces the first edition of IEC 62357 published in 2003 and
constitutes a technical revision. This edition includes the following significant technical
changes with respect to the previous edition:
a) update of the description of the various standards activities within TC 57 and the way they
individually and collectively contribute to meeting the objectives of TC 57;

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– 8 – TR 62357-1 © IEC:2012(E)
b) update of the areas where harmonization of existing standards within TC 57 is needed and
provision of detailed recommendations regarding harmonization of the
CIM IEC 61968/61970 and IEC 61850 standards;
c) definition of a new layered architecture to help direct longer term goals and activities to
ensure compatibility of all new standards developed in TC 57;
d) alignment of the architecture on other internationally recognized architecture standards,
such as the UN/CEFACT Core Components Technical Specification;
e) incorporation of lessons learned during development of the current standards and their
application on actual utility projects;
f) provision of new guidance on the role of TC 57 standards in the Smart Grid.
The text of this technical report is based on the following documents:
Enquiry draft Report on voting
57/1184/DTR 57/1255/RVC

Full information on the voting for the approval of this technical report can be found in the
report on voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 62357 series, published under the general title Power systems
management
...