IEEE C62 92 1-2000 en Guide for the Application of Neutral Grounding in Electrical Utility Systems - Part I Introduction《电力设施系统中线接地的应用 第1部分 说明》.pdf

1、Recognized as anAmerican National Standard (ANSI)The Institute of Electrical and Electronics Engineers, Inc.3 Park Avenue, New York, NY 10016-5997, USACopyright 2005 by the Institute of Electrical and Electronics Engineers, Inc.All rights reserved. Published 4 April 2001. Printed in the United State

2、s of America.Print: ISBN 0-7381-2633-0 SH94889PDF: ISBN 0-7381-2634-9 SS94889No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher.IEEE Std C62.92.1-2000 (R2005)(Revision ofIEEE Std C62.92.1-19

3、87)IEEE Guide for the Applicationof Neutral Grounding in Electrical Utility SystemsPart I: IntroductionSponsorSurge Protective Devices Committeeof theIEEE Power Engineering SocietyReaffirmed 9 June 2005Approved 21 September 2000IEEE-SA Standards BoardAbstract: This guide is the introduction to the C

4、62.92 series of five IEEE guides on neutral grounding inthree-phase electrical utility systems. It provides system grounding definitions and considerations that aregeneral to all types of electrical utility systems.Keywords: class of grounding, coefficient of grounding (COG), earth-fault factor (EFF

5、), earth-return path,effectively grounded, electrical utility systems, grounded solidly, ground-fault current, impedance grounding,means of grounding, neutral grounding, power-system grounding, reactance grounded, system groundingIEEE Standardsdocuments are developed within the IEEE Societies and th

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22、y be required by an IEEE standard or for conducting inquiries into the legal validity orscope of those patents that are brought to its attention.Copyright 2001 IEEE. All rights reserved.iiiIntroduction(This introduction is not a part of IEEE Std C62.92.1-2000, IEEE Guide for the Application of Neutr

23、al Grounding inElectrical Utility SystemsPart I: Introduction.)This guide is the introduction to the IEEE C62.92 series of ve guides on neutral grounding in electricalutility systems. In this series of guides, individual considerations and practices are given to the grounding ofsynchronous generator

24、 systems, generator-station auxiliary systems, distribution systems, and transmissionand subtransmission systems.In the entire IEEE C62.92 series, emphasis is on power-system grounding practices as contrasted with thegrounding, e.g., of industrial systems, which are covered in other guides and stand

25、ards. Those guides andstandards should be referenced, when appropriate, to gain a full picture of other grounding practices.Besides updating the format of the guide, this revision expands the bibliography, adds a new annex to clarifythe effects of grounding resistances and grounded conductors, and a

26、ttempts to clarify areas that elicitedquestions or comments in IEEE Std C62.92-1987.It is impossible to give recognition to all those who have contributed to the technology and practices ofgrounding of power systems. However, the assistance of members, past and present, of the NeutralGrounding Devic

27、es Working Group of the Surge Protective Devices Committee, and other similar groupswith comparable purposes, is gratefully acknowledged.The American National Standards Committee C62, Surge Arrestors, had the following members at the time this guide was approved:J. L. Koepnger,ChairJ. A. Gauthier,NE

28、MA Co-SecretaryN. Ahmad,IEEE Co-SecretaryAt the time this guide was completed, the IEEE Neutral Grounding Devices Working Group had thefollowing members:Douglas C. Dawson,ChairL. BockJ. J. BurkeE. CameronJ. S. CaseC. ChrysanthouT. ComptonW. EtterA. HaaP. JefftriesR. A. JonesW. H. KappG. E. LeeD. W.

29、LenkW. A. MaguireF. D. MartzloffG. N. MillerP. NortarianR. OdenbergJ. OsterhoutT. J. RozekK. B. StumpE. TaylorS. G. WhisenantJ. J. WoodworthT. A. WolfeC. L. BallentineA. BengeJ. J. BurkeD. W. JacksonE. KnappJ. L. KoepngerG. E. LeeS. MazumdarE. R. Taylor, Jr.S. G. WhisenantivCopyright 2001 IEEE. All

30、rights reserved.The following members of the balloting committee voted on this guide:When the IEEE-SA Standards Board approved this standard on 21 September 2000, it had the followingmembership:Donald N. Heirman,ChairJames T. Carlo,Vice ChairJudith Gorman,Secretary*Member EmeritusAlso included is th

31、e following nonvoting IEEE-SA Standards Board liaison:Alan Cookson, NIST RepresentativeDonald R. Volzka, TAB RepresentativeDon MessinaIEEE Standards Project EditorIEEE Green Book is a registered trademark of the Institute of Electrical and Electronics Engineers, Inc.National Electrical Safety Code a

32、nd NESC are both registered trademarks and service marks of the Institute of Electrical andElectronics Engineers, Inc.C. L. BallentineJ. S. BonnesenJ. J. BurkeJ. S. CaseS. R. ChanoJ. F. ChristensenB. R. ColeD. C. DawsonE. P. DickM. FortinJ. FunkeE. GalloG. S. HaralampuJ. HarrisonS. P. HensleyA. R. H

33、ilemanD. W. JacksonB. JohnnerfeltJ. L. KoepngerB. LeuenbergerW. A. MaguireN. P. McQuinJ. H. NelsonR. OdenbergJ. C. OsterhoutC. O. PeixotoP. E. PoolR. V. RebbapragadaA. W. RebeckT. J. RozekE. J. TarasiewiczE. R. Taylor, Jr.A. VitolsR. WallingS. G. WhisenantJ. S. WilliamsJ. Wilson, Jr.J. J. WoodworthD

34、 M. WordenSatish K. AggarwalMark D. BowmanGary R. EngmannHarold E. EpsteinH. Landis FloydJay Forster*Howard M. FrazierRuben D. GarzonJames H. GurneyRichard J. HollemanLowell G. JohnsonRobert J. KennellyJoseph L. Koepnger*Peter H. LipsL. Bruce McClungDaleep C. MohlaJames W. MooreRobert F. MunznerRon

35、ald C. PetersenGerald H. PetersonJohn B. PoseyGary S. RobinsonAkio TojoDonald W. ZipseCopyright 2001 IEEE. All rights reserved.vContents1. Overview 11.1 Scope 11.2 Purpose. 12. References 13. Definitions 24. Basic considerations. 24.1 Goals of system grounding 24.2 System neutral grounding vs. appar

36、atus neutral grounding. 35. Means of grounding . 35.1 Solidly grounded 35.2 Inductance grounded 35.3 Resistance grounded 45.4 Resonant grounded. 45.5 Capacitance grounded 45.6 Ungrounded (isolated neutral) . 55.7 Neutral grounding equipment 56. Classes of grounding 56.1 Grounded system . 56.2 Quanti

37、tative determination of classes of grounding 56.3 Coefficient of grounding 56.4 Earth-fault factor (EFF) . 67. Characteristics of the classes of grounding 77.1 Effectively grounded 77.2 Noneffectively grounded . 87.3 Resistance grounded 87.4 Inductance grounded 87.5 Resonant grounded. 107.6 Unground

38、ed systems 108. Annexes and bibliography 11Annex A (informative) Calculation of coefficients of grounding. 12Annex B (informative) Identity of ground and neutral conductors. 20Annex C (informative) Bibliography 24Copyright 2001 IEEE. All rights reserved.1IEEE Guide for the Applicationof Neutral Grou

39、nding in Electrical Utility SystemsPart I: Introduction1. Overview1.1 ScopeThis guide is intended for application to three-phase electrical utility systems. This is Part I of the ve-partIEEE C62.92 series. This part provides denitions and considerations that are general to all types ofelectrical uti

40、lity systems. The remaining four parts provide specic guidance on synchronous generatorsystems (IEEE Std C62.92.2-1989), generating station auxiliary systems (IEEE Std C62.92.3-1993),distribution systems (IEEE Std C62.92.4-1991), and transmission and subtransmission systems (IEEE StdC62.92.5-1992).1

41、2 PurposeThis guide presents basic considerations for the selection of neutral grounding parameters that will providefor the control of overvoltage and ground-fault current on all parts of three-phase electrical utility systems.2. ReferencesThis guide shall be used in conjunction with the following

42、 publications. When the following publications aresuperseded by an approved revision, the revision shall apply.IEEE Std 80-2000, IEEE Guide for Safety in AC Substation Grounding.1IEEE Std 142-1991, IEEE Recommended Practice for Grounding of Industrial and Commercial PowerSystems (IEEE Green Book).1I

43、EEE publications are available from the Institute of Electrical and Electronics Engineers, Inc., 445 Hoes Lane, P.O. Box 1331, Piscat-away, NJ 08855-1331, USA (http:/standards.ieee.org/).IEEE Std C62.92.1-2000 IEEE GUIDE FOR THE APPLICATION OF NEUTRAL GROUNDING2Copyright 2001 IEEE. All rights reserv

44、ed.ASC C2-1997, Accredited Standards Committee, National Electrical Safety Code(NESC).2IEEE Std C62.92.2-1989 (Reaff 2000), IEEE Guide for the Application of Neutral Grounding in ElectricalUtility SystemsPart II: Grounding of Synchronous Generator Systems.IEEE Std C62.92.3-1993 (Reaff 2000), IEEE Gu

45、ide for the Application of Neutral Grounding in ElectricalUtility SystemsPart III: Generator Auxiliary Systems.IEEE Std C62.92.4-1991 (Reaff 1996), IEEE Guide for the Application of Neutral Grounding in ElectricalUtility SystemsPart IV: Distribution Systems.IEEE Std C62.92.5-1992 (Reaff 1997), IEEE

46、Guide for the Application of Neutral Grounding in ElectricalUtility SystemsPart V: Transmission Systems and Subtransmission Systems.3. DenitionsFor the purpose of this guide the following terms and denitions apply. Terms other than those dened herehave standard denitions as listed in The Authoritati

47、ve Dictionary of IEEE Standards Terms, Seventh EditionB10.33.1 class of grounding: A specic range or degree of grounding; e.g., effectively and noneffectively.3.2 means of grounding:The physical devices by which various degrees of grounding are achieved; e.g.,inductance grounding, resistance groundi

48、ng, or resonant grounding.4. Basic considerationsThere is no one simple answer to the problem of grounding. Each of a number of possible solutions to agrounding problem has at least one feature that is outstanding, but which is obtained at some sacrice ofother features that may be equally worthy. Th

49、us, the selection of the class and means of grounding is often acompromise between somewhat conicting solutions (see IEEE Tutorial Course B17).4.1 Goals of system groundingThe basic goals in selecting a grounding scheme for any given system are as follows:a) Voltage ratings and degree of surge-voltage protection available from surge arrestersb) Limitation of transient line-to-ground overvoltages (see Generator Grounding Guide B2, and IEEETutorial Course B17)c) Sensitivity and selectivity of the ground-fault relayingd) Limitation of the