CAN CSA-IEC 61400-24-2012 Wind turbines - Part 24 Lightning protection (First Edition).pdf

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1、Wind turbines Part 24: LightningprotectionCAN/CSA-IEC 61400-24:12(IEC 61400-24:2010, IDT)National Standard of CanadaNOT FOR RESALE. / PUBLICATION NON DESTINE LA REVENTE.Legal Notice for StandardsCanadian Standards Association (operating as “CSA Group”) develops standards through a consensus standard

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20、acteur.TMA trade-mark of the Canadian Standards Association, operating as “CSA Group”National Standard of CanadaPublished in December 2012 by CSA GroupA not-for-profit private sector organization5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N61-800-463-6727 416-747-4044Visit our On

21、line Store at shop.csa.caPrepared byInternational Electrotechnical CommissionApproved byStandards Council of CanadaCAN/CSA-IEC 61400-24:12Wind turbines Part 24: LightningprotectionReviewed byCAN/CSA-IEC 61400-24:12 Wind turbines Part 24: LightningprotectionCSA/4 2012 CSA Group December 2012CAN/CSA-I

22、EC 61400-24:12Wind turbines Part 24: LightningprotectionCSA PrefaceThis is the first edition of CAN/CSA-IEC 61400-24, Wind turbines Part 24: Lightning protection , which is an adoption without modification of the identically titled IEC (International Electrotechnical Commission) Standard 61400-24 (f

23、irst edition, 2010-06). This Standard supersedes the previous edition, published in 2007 as CAN/CSA-C61400-24, Wind turbine generator systems Part 24: Lightning protection (adopted IEC/TR 61400-24:2002). At the time of publication, IEC 61400-24:2010 is available from IEC in English only. CSA Group w

24、ill publish the French version when it becomes available from IEC.CSA Group acknowledges that the development of this Standard was made possible, in part, by the financial support of Natural Resources Canada (NRCan). This Standard was reviewed for Canadian adoption by the CSA Subcommittee on Wind Tu

25、rbines Lightning Protection, under the jurisdiction of the CSA Technical Committee on Wind Turbines and the CSA Strategic Steering Committee on Requirements for Electrical Safety, and has been formally approved by the Technical Committee. This Standard has been approved as a National Standard of Can

26、ada by the Standards Council of Canada. Interpretations: The Strategic Steering Committee on Requirements for Electrical Safety has provided the following direction for the interpretation of standards under its jurisdiction: “The literal text shall be used in judging compliance of products with the

27、safety requirements of this Standard. When the literal text cannot be applied to the product, such as for new materials or construction, and when a relevant committee interpretation has not already been published, CSA Groups procedures for interpretation shall be followed to determine the intended s

28、afety principle.” Note to the user: A climatology of lightning ground flash density (Ng), superior to the use of thunderstorm days at synoptic meteorological stations in determining the CAN/CSA-IEC 61400-24 class of lightning protection for wind turbines, can be accessed from Environment Canada by c

29、ontacting climate.servicesec.gc.ca and including reference to this Standard.Preliminary estimates of regional soil resistivity () in units of m can be obtained from Figure 37 of ITU-R Recommendation P.832-3, “World Atlas of Ground Conductivities”, using the conversion factor = 1000/ where the conduc

30、tivity is the map value in mS/m. (http:/www.itu.int/rec/R-REC-P.832-3-201202-I/en) 2012 CSA GroupAll rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of thepublisher. IEC material is reprinted with permission. Where the words “this In

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32、CSA-IEC 61400-24:12 Wind turbines Part 24: LightningprotectionDecember 2012 2012 CSA Group CSA/5To purchase standards and related publications, visit our Online Store at shop.csa.ca or call toll-free 1-800-463-6727 or 416-747-4044.This Standard is subject to periodic review, and suggestions for its

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34、ing of the proposed change; and(d) rationale for the change.IEC 61400-24Edition 1.0 2010-06INTERNATIONAL STANDARD Wind turbines Part 24: Lightning protection IEC61400-24:2010(E) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2010 IEC, Geneva, Switzerland All rights reserved. Unless otherwise spec

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40、org The worlds leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical Vocabulary online. Customer Service Centre: www.iec.ch/

41、webstore/custserv If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service Centre FAQ or contact us: Email: csciec.ch Tel.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 61400-24Edition 1.0 2010-06INTERNATIONAL STANDARD Wind turbines Part 24

42、: Lightning protection INTERNATIONAL ELECTROTECHNICAL COMMISSION XGICS 27.180 PRICE CODE Registered trademark of the International Electrotechnical Commission 2 61400-24 IEC:2010(E) CONTENTS FOREWORD.8 1 Scope.10 2 Normative references .10 3 Terms and definitions .12 4 Symbols and units 18 5 Abbrevi

43、ations .20 6 Lightning environment for wind turbine .20 6.1 General .20 6.2 Lightning current parameters and lightning protection levels (LPL) 20 7 Lightning exposure assessment22 7.1 General .22 7.2 Assessing the frequency of lightning affecting a wind turbine 23 7.3 Assessing the risk of damage26

44、7.3.1 Basic equation.26 7.3.2 Assessment of risk components due to flashes to the wind turbine (S1) .27 7.3.3 Assessment of the risk component due to flashes near the wind turbine (S2) .27 7.3.4 Assessment of risk components due to flashes to a service line connected to the wind turbine (S3) 27 7.3.

45、5 Assessment of risk component due to flashes near a service line connected to the wind turbine (S4) 28 8 Lightning protection of subcomponents.29 8.1 General .29 8.2 Blades.29 8.2.1 General .29 8.2.2 Requirements 29 8.2.3 Verification 29 8.2.4 Protection design considerations .30 8.2.5 Test methods

46、.32 8.3 Nacelle and other structural components.32 8.3.1 General .32 8.3.2 Hub .33 8.3.3 Spinner33 8.3.4 Nacelle 33 8.3.5 Tower 34 8.3.6 Testing methods34 8.4 Mechanical drive train and yaw system34 8.4.1 General .34 8.4.2 Bearings35 8.4.3 Hydraulic systems .35 8.4.4 Spark gaps and sliding contacts

47、35 8.4.5 Testing 35 8.5 Electrical low-voltage systems and electronic systems and installations 36 8.5.1 General .36 8.5.2 LEMP protection measures (LPMS) .36 8.5.3 Lightning protection zones (LPZ) .37 CAN/CSA-IEC 61400-24:1261400-24 IEC:2010(E) 3 8.5.4 Equipotential bonding within the wind turbine

48、37 8.5.5 Shielding and line routing 37 8.5.6 Coordinated SPD protection 38 8.5.7 Testing methods for system immunity tests41 8.6 Electrical high-voltage (HV) power systems.41 9 Earthing of wind turbines and wind farms .43 9.1 General .43 9.1.1 Basic requirements43 9.1.2 Earth electrode arrangements4

49、3 9.1.3 Earthing system impedance.44 9.2 Equipotential bonding44 9.2.1 General .44 9.2.2 Lightning equipotential bonding for metal installations .44 9.2.3 Electrically insulated LPS 45 9.3 Structural components.45 9.3.1 General .45 9.3.2 Metal tubular type tower 45 9.3.3 Metal reinforced concrete towers.45 9.3.4 Lattice tower46 9