IEC PAS 61850-9-3:2015

Communication networks and systems for power utility automation - Part 9-3: Precision time protocol profile for power utility automation

IEC PAS 61850-9-3:2015(E) specifies a precision time protocol (PTP) profile of IEC 61588:2009 applicable to power utility automation which allows compliance with the highest synchronization classes of IEC 61850-5 and IEC 61869-9.

General Information

• Status: Replaced
• Publication Date: 11-Jun-2015
• ICS: 29.060.20 - Cables
• 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: DELPUB - Deleted Publication
• Completion Date: 31-May-2016

Relations

• Replaced By: IEC/IEEE 61850-9-3:2016 - Communication networks and systems for power utility automation - Part 9-3: Precision time protocol profile for power utility automation
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC PAS 61850-9-3
®

Edition 1.0 2015-06
PUBLICLY AVAILABLE
SPECIFICATION
PRE-STANDARD


Communication networks and systems for power utility automation –
Part 9-3: Precision time protocol profile for power utility automation

IEC PAS 61850-9-3:2015-06(en)

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IEC PAS 61850-9-3

®


Edition 1.0 2015-06




PUBLICLY AVAILABLE



SPECIFICATION




PRE-STANDARD















Communication networks and systems for power utility automation –

Part 9-3: Precision time protocol profile for power utility automation



























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ICS 33.200 ISBN 978-2-8322-2725-1



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® Registered trademark of the International Electrotechnical Commission

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– 2 – IEC PAS 61850-9-3:2015  IEC 2015
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references. 6
3 Terms, definitions, abbreviations and acronyms . 6
3.1 Terms and definitions . 6
3.2 Abbreviations and acronyms . 7
4 Identification . 7
5 Clock types . 7
6 Protocol specifications . 8
7 Requirements . 8
7.1 Measurement conditions . 8
7.2 Network time inaccuracy . 9
7.3 Network elements . 9
7.4 Requirements for grandmasters . 9
7.4.1 Grandmaster time inaccuracy . 9
7.4.2 Grandmaster holdover . 9
7.4.3 Grandmaster clockClass in holdover and recovery . 9
7.5 Requirements for TCs . 9
7.6 Requirements for BCs . 10
7.6.1 BC time inaccuracy . 10
7.6.2 BC as free-running grandmaster . 10
7.6.3 BC as master in holdover . 10
7.7 Requirements for media converters . 10
7.8 Requirements for links . 10
7.9 Network engineering . 10
8 Default settings . 11
9 Redundant clock handling . 12
10 Protocol Implementation Conformance Statement (PICS) . 12
10.1 Conventions . 12
10.2 PICS . 12

Table 1 – PTP attributes for the Power Utility Automation profile . 11
Table 2 – PICS for clocks . 12

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IEC PAS 61850-9-3:2015  IEC 2015 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

COMMUNICATION NETWORKS AND
SYSTEMS FOR POWER UTILITY AUTOMATION –

Part 9-3: Precision time protocol
profile for power utility automation

FOREWORD
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– 4 – IEC PAS 61850-9-3:2015  IEC 2015
IEC PAS 61850-9-3 has been developed by IEC technical committee 57: Power systems
management and associated information exchange, in cooperation with the IEEE Power
Systems Relaying Committee Working Group H24/Substation Committee Working Group C7
of the Power & Energy Society of the IEEE, and IEC subcommittee 65C: Industrial networks,
of IEC technical committee 65: Industrial-process measurement, control and automation.
The text of this PAS is based on the This PAS was approved for
following document: publication by the P-members of the
committee concerned as indicated in
the following document
Draft PAS Report on voting
57/1551/PAS 57/1575/RVD

Following publication of this PAS, which is a pre-standard publication, the technical committee
or subcommittee concerned may transform it into an International Standard.
This PAS shall remain valid for an initial maximum period of 3 years starting from the
publication date. The validity may be extended for a single period up to a maximum of
3 years, at the end of which it shall be published as another type of normative document, or
shall be withdrawn.
A bilingual version of this publication may be issued at a later date.

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IEC PAS 61850-9-3:2015  IEC 2015 – 5 –
INTRODUCTION
This PAS specifies a precision time protocol (PTP) profile of IEC 61588:2009 applicable to
power utility automation which allows compliance with the highest synchronization classes of
IEC 61850-5 and IEC 61869-9.
This PAS applies Layer 2 communication according to IEC 61588:2009, Annex F, and uses
peer-to-peer delay measurement according to the IEC 61588:2009, Annex J.4, default profile
with restricted range values.
When clocks have a single attachment, this profile is a subset of IEC 61588:2009 with the
above restrictions.
When clocks have an optional double attachment, this profile extends the BMCA of
IEC 61588:2009 as IEC 62439-3:2015, Annex A, specifies.

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– 6 – IEC PAS 61850-9-3:2015  IEC 2015
COMMUNICATION NETWORKS AND
SYSTEMS FOR POWER UTILITY AUTOMATION –

Part 9-3: Precision time protocol
profile for power utility automation



1 Scope
This PAS specifies a precision time protocol (PTP) profile of IEC 61588:2009 applicable to
power utility automation which allows compliance with the highest synchronization classes of
IEC 61850-5 and IEC 61869-9.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 61588:2009, Precision clock synchronization protocol for networked measurement and
control systems
IEC TR 61850-90-4:2013, Communication networks and systems for power utility automation
– Part 90-4: Network engineering guidelines
IEC 62439-3:2015, Industrial communication networks – High availability automation networks
– Part 3: Parallel Redundancy Protocol (PRP) and High-availability Seamless Redundancy
(HSR)
ISO/IEC 9646-7, Open systems interconnection – Conformance testing methodology and
framework – Part 7: Implementation conformance statements
3 Terms, definitions, abbreviations and acronyms
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 61588:2009 and
IEC 62439-3:2015, as well as the following, apply:
3.1.1
grandmaster-capable
ordinary clock or boundary clock that is able to take the role of a grandmaster
Note 1 to entry: A grandmaster-capable clock is not necessarily connected to a recognized time source.
3.1.2
time error
deviation from the time reference used for measurement or synchronization caused by a
network element, evaluated over a short time span (a few Sync intervals)

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IEC PAS 61850-9-3:2015  IEC 2015 – 7 –
3.1.3
time inaccuracy
time error not exceeded by 99,7% of the measurements, evaluated over a series of 1 000
measurements (about 20 minutes) in steady state
Note 1 to entry: Assuming a Gaussian distribution, this corresponds to three sigma (3 σ = 99,7%) or no more than
3 points outside the specified interval, out of 1 000 total points evaluated.
3.1.4
network time inaccuracy
time inaccuracy evaluated or measured between a particular slave clock and the time
reference signal
...