IEC TS 61850-1-2:2020

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

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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
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