IEC TS 61850-1-2:2020

Communication networks and systems for power utility automation - Part 1-2: Guideline on extending IEC 61850

IEC TS 61850-1-2:2020, which is a technical specification, is intended for any users but primarily for standardization bodies that are considering using IEC 61850 as a base standard within the scope of their work and are willing to extend it as allowed by the IEC 61850 standards. This document identifies the required steps and high-level requirements in achieving such extensions of IEC 61850 and provides guidelines for the individual steps.
Within that scope, this document addresses the following cases:
• The management of product-level standards for products that have an interface based on IEC 61850
• The management of domain-level standards based on IEC 61850
• The management of transitional standards based on IEC 61850
• The management of private namespaces based on IEC 61850
• The development of standards offering the mapping of IEC 61850 data model at CDC level
• The development and management of IEC 61850 profiles for domains (underlying the role of IEC TR 62361-103 and IEC TR 61850-7-6)
This document includes both technical and process aspects:
On the technical side, this document:
• Reminds the main basic requirements (mostly referring to the appropriate parts of the series which host the requirements or recommendations)
• Lists all possible flexibilities offered by the standards
• Defines which flexibilities are allowed/possible per type of extension cases
On the process side, the document covers:
• The initial analysis of how the existing IEC 61850 object models and/or communication services may be applied and what allowed extensions may be required for utilizing them in new or specific domains (including private ones). The results of that step are expected to be documented
• The extension of the IEC 61850 object models for new domains. The typical associated work is to identify existing logical nodes which can be reused "as is", to determine if existing logical nodes can be extended, or to define new logical nodes
• The purpose and process to use transitional namespaces, which are expected to be merged eventually into an existing standard namespace
• The management of standard namespaces
• The development of private namespaces

General Information

• Status: Published
• Publication Date: 10-Jul-2022
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 33.200 - Telecontrol. Telemetering
• Technical Committee: TC 57 - Power systems management and associated information exchange
• Drafting Committee: WG 10 - TC 57/WG 10
• Current Stage: PPUB - Publication issued
• Start Date: 06-Jul-2020
• Completion Date: 16-Jun-2020

Relations

• Amended By: IEC TS 61850-1-2:2020/AMD1:2022 - Amendment 1 - Communication networks and systems for power utility automation - Part 1-2: Guideline on extending IEC 61850
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC TS 61850-1-2 ®
Edition 1.0 2020-06
TECHNICAL
SPECIFICATION
colour
inside
Communication networks and systems for power utility automation –
Part 1-2: Guidelines on extending IEC 61850

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Central Office Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
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International Standards for all electrical, electronic and related technologies.

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latest edition, a corrigendum or an amendment might have been published.

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IEC TS 61850-1-2 ®
Edition 1.0 2020-06
TECHNICAL
SPECIFICATION
colour
inside
Communication networks and systems for power utility automation –

Part 1-2: Guidelines on extending IEC 61850

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.200 ISBN 978-2-8322-8471-1

– 2 – IEC TS 61850-1-2:2020 © IEC 2020
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative References . 7
3 Terms and definitions . 8
4 Key principles reminder . 10
4.1 General . 10
4.2 Namespace introduction. 10
4.2.1 General . 10
4.2.2 Basic namespaces . 11
5 Main cases of extensions of IEC 61850 . 12
5.1 Namespace extensions and associated rules . 12
5.1.1 General . 12
5.1.2 Domain namespaces . 12
5.1.3 Product standard namespaces . 12
5.1.4 Transitional namespaces . 12
5.1.5 Private namespaces . 13
5.2 IEC 61850 profiles for domains . 13
5.3 Mapping of IEC 61850 data model to other protocols at CDC level . 13
6 What to extend in relation with IEC 61850? . 13
6.1 List of basic requirements . 13
6.1.1 General . 13
6.1.2 IEC 61850 structure reminder . 13
6.1.3 Main deliverables and their positioning in IEC 61850 documentation
structure . 15
6.1.4 Intellectual property requirements . 16
6.1.5 Editorial Recommendations . 17
6.1.6 Data Model extension requirements . 17
6.1.7 XML namespace extensions . 26
6.1.8 Cyber-security requirements . 27
6.1.9 Conformance Testing requirements . 27
6.1.10 Maintenance of standard extension document . 27
6.1.11 Backward compatibility treatment. 31
6.2 List of IEC 61850 flexibilities . 33
6.2.1 General . 33
6.2.2 Data Model flexibilities . 33
6.2.3 Communication services . 35
6.2.4 SCL language . 35
6.3 Allowed flexibilities per extension cases. 37
7 The main activities for extending IEC 61850 . 39
7.1 Typical activities applying to all types of extension. 39
7.1.1 General . 39
7.1.2 List the main use cases for extending IEC 61850 -> deliverable P1 . 40
7.1.3 Ensure knowledge of the existing IEC 61850 content . 40
7.1.4 Identify possible IEC 61850 gaps . 40
7.1.5 Build-up IEC 61850 extensions . 40
7.1.6 Maintain IEC 61850 extensions . 40

7.2 Define a standard namespace (product, domain or transitional) – if needed –
-> deliverable P2a or P2b . 40
7.2.1 General . 40
7.2.2 Get a model manager nominated . 41
7.2.3 Get the proposed model reviewed . 41
7.2.4 Publish a namespace extension . 41
7.3 Define "standard" profile(s) – if needed – deliverable P3 (and P4) . 42
7.3.1 General . 42
7.3.2 Define interoperability objectives . 42
7.3.3 Publish profile(s) -> deliverable P3 . 42
7.3.4 Publish profile(s) testing -> deliverable P4 . 42
Annex A (informative) IEC 61850 roadmap (example) . 43
Bibliography . 45

Figure 1 – IEC 61850 documentation structure . 14
Figure 2 – Extensions deliverables positioned in the IEC 61850 document structure . 15
Figure 3 – Handling versioning information for official IEC publication . 28
Figure 4 – Handling versioning information during the internal IEC writing process . 29
Figure 5 – Example of tissue fix sequence and its impact on versioning information . 30
Figure 6 – Activities related to IEC 61850 extensions . 39
Figure A.1 – Example of IEC 61850 roadmap . 44

Table 1 – Typical deliverables attached to IEC 61850 extensions . 16
Table 2 – Normative information related to a namespace (for example for
IEC61850‑7‑420:2009A release 5) . 19
Table 3 – Informative information related to a namespace (for example for
IEC61850‑7‑420:2009A release 5) . 19
Table 4 – Classification of Abbreviations in regards of their contribution to form a DO
Name (examples) . 23
Table 5 – Semantic description frame and requirements . 25
Table 6 – Typical compatibility assessment. 31
Table 7 – Typical compatibility assessment and associated compatibility rules –
detailed discussion . 31
Table 8 – Typical compatibility table . 32
Table 9 – Allowed flexibilities per extension cases . 37

– 4 – IEC TS 61850-1-2:2020 © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
COMMUNICATION NETWORKS AND SYSTEMS
FOR POWER UTILITY AUTOMATION –

Part 1-2: Guidelines on extending IEC 61850

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity
...

IEC TS 61850-1-2 ®
Edition 1.1 2022-07
CONSOLIDATED VERSION
TECHNICAL
SPECIFICATION
colour
inside
Communication networks and systems for power utility automation –
Part 1-2: Guideline on extending IEC 61850

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Secretariat Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always
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and withdrawn publications.
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The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and
and French, with equivalent terms in 19 additional languages.
once a month by email.
Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc

If you wish to give us your feedback on this publication or
need further assistance, please contact the Customer Service
Centre: [e-mail].
IEC TS 61850-1-2 ®
Edition 1.1 2022-07
CONSOLIDATED VERSION
TECHNICAL
SPECIFICATION
colour
inside
Communication networks and systems for power utility automation –
Part 1-2: Guideline on extending IEC 61850
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.200 ISBN 978-2-8322-3984-1

– 2 – IEC TS 61850-1-2:2020+AMD1:2022 CSV
© IEC 2022
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative References . 7
3 Terms and definitions . 8
4 Key principles reminder . 10
4.1 General . 10
4.2 Namespace introduction. 10
4.2.1 General . 10
4.2.2 Basic namespaces . 11
5 Main cases of extensions of IEC 61850 . 12
5.1 Namespace extensions and associated rules . 12
5.1.1 General . 12
5.1.2 Domain namespaces . 12
5.1.3 Product standard namespaces . 12
5.1.4 Transitional namespaces . 13
5.1.5 Private namespaces . 13
5.2 IEC 61850 profiles for domains . 13
5.3 Mapping of IEC 61850 data model to other protocols at CDC level . 13
6 What to extend in relation with IEC 61850? . 14
6.1 List of basic requirements . 14
6.1.1 General . 14
6.1.2 IEC 61850 structure reminder . 14
6.1.3 Main deliverables and their positioning in IEC 61850 documentation
structure . 15
6.1.4 Intellectual property requirements . 16
6.1.5 Editorial Recommendations . 17
6.1.6 Data Model extension requirements . 19
6.1.7 XML namespace extensions . 28
6.1.8 Cyber-security requirements . 29
6.1.9 Conformance Testing requirements . 29
6.1.10 Maintenance of standard extension document . 29
6.1.11 Backward compatibility treatment. 34
6.2 List of IEC 61850 flexibilities . 37
6.2.1 General . 37
6.2.2 Data Model flexibilities . 37
6.2.3 Communication services . 39
6.2.4 SCL language . 39
6.3 Allowed flexibilities per extension cases. 41
7 The main activities for extending IEC 61850 . 43
7.1 Typical activities applying to all types of extension. 43
7.1.1 General . 43
7.1.2 List the main use cases for extending IEC 61850 -> deliverable P1 . 44
7.1.3 Ensure knowledge of the existing IEC 61850 content . 44
7.1.4 Identify possible IEC 61850 gaps . 44
7.1.5 Build-up IEC 61850 extensions . 44
7.1.6 Maintain IEC 61850 extensions . 44

© IEC 2022
7.2 Define a standard namespace (product, domain or transitional) – if needed
-> deliverable P2a or P2b . 44
7.2.1 General . 44
7.2.2 Get a model manager nominated . 45
7.2.3 Get the proposed model reviewed . 45
7.2.4 Publish a namespace extension . 45
7.3 Define "standard" profile(s) – if needed –> deliverable P3 (and P4) . 46
7.3.1 General . 46
7.3.2 Define interoperability objectives . 46
7.3.3 Publish profile(s) -> deliverable P3 . 46
7.3.4 Publish profile(s) testing -> deliverable P4 . 46
Annex A (informative) IEC 61850 roadmap (example) . 47
Bibliography . 49

Figure 1 – IEC 61850 documentation structure . 14
Figure 2 – Extensions deliverables positioned in the IEC 61850 document structure . 15
Figure 3 – Handling versioning information for official IEC publication . 31
Figure 4 – Handling versioning information during the internal IEC writing process . 32
Figure 5 – Example of tissue fix sequence and its impact on versioning information . 33
Figure 6 – Activities related to IEC 61850 extensions . 43
Figure A.1 – Example of IEC 61850 roadmap . 48

Table 1 – Typical deliverables attached to IEC 61850 extensions . 16
Table 10 – Reference between published versions of the standard and related
namespace name . 17
Table 2 – Normative information related to a namespace (for example for IEC61850-7-
499:2009B release 5) . 20
Table 3 – Informative information related to a namespace (for example for
IEC61850‑7‑420:2009A release 5) . 21
Table 4 – Classification of Abbreviations in regards of their contribution to form a DO
Name (examples) . 25
Table 5 – Semantic description frame and requirements . 27
Table 11 – Attributes of an xsd namespace (example) . 29
Table 6 – Typical compatibility assessment. 34
Table 7 – Typical compatibility assessment and associated compatibility rules –
detailed discussion . 35
Table 8 – Typical compatibility table . 36
Table 9 – Allowed flexibilities per extension cases . 41

– 4 – IEC TS 61850-1-2:2020+AMD1:2022 CSV
© IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
COMMUNICATION NETWORKS AND SYSTEMS
FOR POWER UTILITY AUTOMATION –

Part 1-2: Guidelines on extending IEC 61850

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national
...