1、 IEEE Standard Profile for Use of IEEE 1588 Precision Time Protocol in Power System Applications Sponsored by the Power System Relaying Committee and Substations Committee IEEE 3 Park Avenue New York, NY 10016-5997 USA 14 July 2011 IEEE Power +1 978 750 8400. Permission to photocopy portions of any
2、individual standard for educational classroom use can also be obtained through the Copyright Clearance Center. Introduction This introduction is not part of IEEE Std C37.238-2011, IEEE Standard Profile for Use of IEEE 1588 Precision Time Protocol in Power System Applications. This standard specifies
3、 a common profile for use of IEEE 1588 Precision Time Protocol (PTP) in power system protection, control, automation, and data communication applications utilizing an Ethernet communications architecture. Typical Ethernet-based time distribution architecture consists of a reference clock, bridges, a
4、nd end devices. Bridges with boundary clock functionality may also be used at interconnection points between different PTP domains or PTP profiles. In addition to distributing global time that is traceable to a recognized standard time source, the profile has a provision for distributing local time
5、for the cases when connectivity to recognized standard time sources is lost. The profile can be used for precise time synchronization of the devices in a substation, and between substations in a larger geographical area, if performance requirements of this standard are met. The use of different phys
6、ical layer communication technologies to carry Ethernet frames, including SONET/SDH and wireless technologies, is not precluded if they can meet performance requirements of this standard. Time distribution specified in this standard is based on the following basic assumptions: All devices that parti
7、cipate in time distribution support this standard. All devices are in the same time distribution domain. All devices have point-to-point connections to their neighbors. Transmit and receive cable delay for each point-to-point connection is assumed to be symmetrical. Known asymmetry in cable delay ca
8、n be configured and corrected. The use of security techniques is an important consideration and, based on the application, may be desirable or mandated. Security extensions and network engineering methods for hardening the PTP-based time distribution system against malicious attacks are not covered,
9、 and are outside of scope of this standard. If security techniques are used, they should not impair the ability of devices to achieve performance, specified in this standard. Future improvements in IEEE 1588 security mechanism will be considered in a revision of this standard. Redundancy is an impor
10、tant consideration; some applications recommend or mandate support for different time distribution technologies, e.g., Global Positioning System (GPS) and Inter-Range Instrumentation Group B (IRIG-B). Support for multiple time distribution technologies at the same time is out of scope of this standa
11、rd. iv Copyright 2011 IEEE. All rights reserved. Notice to users Laws and regulations Users of these documents should consult all applicable laws and regulations. Compliance with the provisions of this standard does not imply compliance to any applicable regulatory requirements. Implementers of the
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17、ation or the IEEE standards development process, visit the IEEE-SA web site at http:/standards.ieee.org. Errata Errata, if any, for this and all other standards can be accessed at the following URL: http:/standards.ieee.org/reading/ieee/updates/errata/index.html. Users are encouraged to check this U
18、RL for errata periodically. Interpretations Current interpretations can be accessed at the following URL: http:/standards.ieee.org/reading/ieee/interp/ index.html. v Copyright 2011 IEEE. All rights reserved. Patents Attention is called to the possibility that implementation of this standard may requ
19、ire use of subject matter covered by patent rights. By publication of this standard, no position is taken with respect to the existence or validity of any patent rights in connection therewith. The IEEE is not responsible for identifying Essential Patent Claims for which a license may be required, f
20、or conducting inquiries into the legal validity or scope of Patents Claims or determining whether any licensing terms or conditions provided in connection with submission of a Letter of Assurance, if any, or in any licensing agreements are reasonable or non-discriminatory. Users of this standard are
21、 expressly advised that determination of the validity of any patent rights, and the risk of infringement of such rights, is entirely their own responsibility. Further information may be obtained from the IEEE Standards Association. vi Copyright 2011 IEEE. All rights reserved. vii Copyright 2011 IEEE
22、. All rights reserved. Participants At the time this standard was submitted to the IEEE-SA Standards Board for approval, the IEEE 1588 Profile for Power System Applications Working Group had the following membership: Galina S. Antonova, Chair William Dickerson, Vice Chair Alex Apostolov Christoph Br
23、unner Dac-Phuoc Bui Michael Dood Heiko Gerstung Didier Giarratano Richard Harada Clemens Hoga Christopher R. Huntley Hubert Kirrmann Stanley Klein Tom Ko Steven A. Kunsman Kenneth Martin Gary Michel Ren Midence Bruce Muschlitz Roger Moore R. Jay Murphy Bogdan Popescu Craig Preuss Farnoosh Rahmatian
24、Markus Renz Veselin Skendzic Fred Steinhauser Tim Tibbals Jean-Charles Tournier Benton A. Vandiver Jon Waters Justin Wu Baihua Xue The following members of the individual balloting committee voted on this standard. Balloters may have voted for approval, disapproval, or abstention. William J. Ackerma
25、n Mark Adamiak Satish K. Aggarwal Galina S. Antonova James Ariza Ali Al Awazi Chris Bagge Philip Beaumont P. Stephan Bedrosian Kenneth Behrendt William Bloethe Chris Brooks Gustavo Brunello Christoph Brunner Arvind K. Chaudhary Prashanth Chittapuram Stephen Conrad James Cornelison Patrick Diamond Ga
26、ry Donner Michael Dood Randall Dotson Neal Dowling Lee Eccles Gary Engmann Ronald Farquharson Kenneth Fodero Heiko Gerstung Jeffrey Gilbert Roman Graf Ron Greenthaler Stephen Grier Randall Groves Roger Hedding Gary Heuston Werner Hoelzl Gary Hoffman David Horvath Christopher R. Huntley Innocent Kamw
27、a Piotr Karocki Bogdan Kasztenny Yuri Khersonsky Stanley Klein Joseph L. Koepfinger Jim Kulchisky Chung-Yiu Lam Greg Luri Wayne W. Manges Kenneth Martin Pierre Martin William McBride David Mcginn Gary Michel Ren Midence William Moncrief Georges Montillet Jerry Murphy R. Murphy Bruce Muschlitz Michae
28、l S. Newman Chris Osterloh Lorraine Padden Donald Parker Charles Petras Robert Pettigrew Ulrich Pohl Craig Preuss Michael Roberts Robert Robinson Charles Rogers M. Sachdev Bartien Sayogo Thomas Schossig Sam Sciacca Gil Shultz Tarlochan Sidhu Mark Simon Veselin Skendzic James Smith Jerry Smith Aaron
29、Snyder John Spare Gary Stoedter Walter Struppler John Tengdin Michael Thompson Joe Uchiyama Eric Udren Benton A. Vandiver John Vergis Jane Verner Ilia Voloh John Wang Jon Waters Stephen Webb Karl Weber Ludwig Winkel Phil Winston Oren YuenWhen the IEEE-SA Standards Board approved this standard on 16
30、June 2011, it had the following membership: Richard H. Hulett, Chair John Kulick, Vice Chair Robert M. Grow, Past Chair Judith Gorman, Secretary Masayuki Ariyoshi William Bartley Ted Burse Clint Chaplin Wael Diab Jean-Philippe Faure Alexander Gelman Paul Houz Jim Hughes Joseph L. Koepfinger* David J
31、. Law Thomas Lee Hung Ling Oleg Logvinov Ted Olsen Gary Robinson Jon Walter Rosdahl Sam Sciacca Mike Seavey Curtis Siller Phil Winston Howard L. Wolfman Don Wright *Member Emeritus Also included are the following nonvoting IEEE-SA Standards Board liaisons: Satish K. Aggarwal, NRC Representative Rich
32、ard DeBlasio, DOE Representative Michael Janezic, NIST Representative Lisa Perry IEEE Standards Program Manager, Document Development Matthew J. Ceglia IEEE Standards Program Manager, Technical Program Development viii Copyright 2011 IEEE. All rights reserved. Contents 1. Overview 1 1.1 Scope . 1 1.
33、2 Purpose 1 2. Normative references 2 3. Definitions, special terms, and word usage 2 3.1 Definitions . 2 3.2 Special terms 5 3.3 Word usage 5 4. Abbreviations . 5 5. Standard profile for power system applications . 6 5.1 Identification 6 5.2 PTP attribute values. 7 5.3 Path delay mechanism . 7 5.4
34、Best master clock algorithm 8 5.5 Management mechanism . 8 5.6 Transport mechanism. 11 5.7 Clock types 12 5.8 Communication model. 12 5.9 Timescale. 12 5.10 Clauses 16 and 17, Annexes K and L of IEEE Std 1588-2008 13 5.11 clockIdentity 13 5.12 TLVs 13 5.13 TimeInaccuracy . 15 Annex A (informative) O
35、perating modes. 16 Annex B (normative) Steady-state performance requirements. 18 Annex C (informative) Time performance parameters and their use for IEC 61850, IEEE Std C37.118, and IRIG-B applications. 19 Annex D (informative) Use of IEEE C37.238 messages for slave-only clocks (IRIG-B replacement)
36、. 25 Annex E (normative) Management Information Base 29 Annex F (informative) Bibliography 54 ix Copyright 2011 IEEE. All rights reserved. IEEE Standard Profile for Use of IEEE 1588 Precision Time Protocol in Power System Applications IMPORTANT NOTICE: This standard is not intended to ensure safety,
37、 security, health, or environmental protection. Implementers of the standard are responsible for determining appropriate safety, security, environmental, and health practices or regulatory requirements. This IEEE document is made available for use subject to important notices and legal disclaimers.
38、These notices and disclaimers appear in all publications containing this document and may be found under the heading “Important Notice” or “Important Notices and Disclaimers Concerning IEEE Documents.” They can also be obtained on request from IEEE or viewed at http:/standards.ieee.org/IPR/disclaime
39、rs.html. 1. Overview 1.1 Scope This standard specifies a common profile for the use of IEEE 1588 Precision Time Protocol (PTP) in power system protection, control, automation, and data communication applications utilizing an Ethernet communications architecture. The profile specifies a well-defined
40、subset of IEEE 1588 mechanisms and settings aimed at enabling device interoperability, robust response to network failures, and deterministic control of delivered time quality. It specifies the preferred physical layer (Ethernet) higher level protocol used for PTP message exchange and the PTP protoc
41、ol configuration parameters. Special attention is given to ensuring consistent and reliable time distribution within substations, between substations, and across wide geographic areas. 1.2 Purpose The purpose of this standard is to facilitate adoption of IEEE Std 1588-2008 for power system applicati
42、ons requiring high precision time synchronization.1It specifies a common subset of PTP parameters and options to provide global time availability, device interoperability, and failure management. This set of PTP 1Information on references can be found in Clause 2. 1 Copyright 2011 IEEE. All rights r
43、eserved. IEEE Std C37.238-2011 IEEE Standard Profile for Use of IEEE 1588 Precision Time Protocol in Power System Applications parameters and options allows IEEE 1588-based time synchronization to be used in mission critical power system protection, control, automation, and data communication applic
44、ations. 2. Normative references The following referenced documents are indispensable for the application of this document (i.e., they must be understood and used, so each referenced document is cited in text and its relationship to this document is explained). For dated references, only the edition
45、cited applies. For undated references, the latest edition of the referenced document (including any amendments or corrigenda) applies. IEEE Std 1588-2008, IEEE Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems.2,33. Definitions, special terms, and
46、word usage For the purposes of this document, the following terms and definitions apply. The IEEE Standards Dictionary: Glossary of Terms traceability. Precision Time Protocol (PTP): The protocol defined by IEEE Std 1588-2008. As an adjective, it indicates that the modified noun is specified in or i
47、nterpreted in the context of IEEE Std 1588-2008. primary reference: A source of time and or frequency that is traceable to international standards. See also: traceability. profile: The set of allowed Precision Time Protocol (PTP) features applicable to a device. Precision Time Protocol (PTP) communi
48、cation: Information used in the operation of the protocol, transmitted in a PTP message over a PTP communication path. Precision Time Protocol (PTP) communication path: The signaling path portion of a particular network enabling direct communication among ordinary and boundary clocks. Precision Time
49、 Protocol (PTP) message: One of the message types defined in IEEE Std 1588-2008. Precision Time Protocol (PTP) port: A logical access point of a clock for PTP communications to the communications network. preferred grandmaster clock: A grandmaster-capable device that is intended to be the best or backup grandmaster in the network. Typically a preferred grandmaster has an independent connection to a recognized standard time source. There should be at least two preferred grandmaster clocks in a system. recognized standard time source: A recognized standard
