IEC_61400-1.PDF

INTERNATIONAL STANDARD IEC61400-1 Third edition2005-08 Wind turbines Part 1:Design requirements Reference number IEC 61400-1:2005(E)Licensed to/GAMESA EOLICAANSI Store order#X211868 Downloaded:10/5/2005 11:48:54 AM ETSingle user license only.Copying and networking prohibited.Publication numbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 series.For example,IEC 34-1 is now referred to as IEC 60034-1.Consolidated editions The IEC is now publishing consolidated versions of its publications.For example,edition numbers 1.0,1.1 and 1.2 refer,respectively,to the base publication,the base publication incorporating amendment 1 and the base publication incorporating amendments 1 and 2.Further information on IEC publications The technical content of IEC publications is kept under constant review by the IEC,thus ensuring that the content reflects current technology.Information relating to this publication,including its validity,is available in the IEC Catalogue of publications(see below)in addition to new editions,amendments and corrigenda.Information on the subjects under consideration and work in progress undertaken by the technical committee which has prepared this publication,as well as the list of publications issued,is also available from the following:IEC Web Site(www.iec.ch)Catalogue of IEC publications The on-line catalogue on the IEC web site(www.iec.ch/searchpub)enables you to search by a variety of criteria including text searches,technical committees and date of publication.On-line information is also available on recently issued publications,withdrawn and replaced publications,as well as corrigenda.IEC Just Published This summary of recently issued publications(www.iec.ch/online_news/justpub)is also available by email.Please contact the Customer Service Centre(see below)for further information.Customer Service Centre If you have any questions regarding this publication or need further assistance,please contact the Customer Service Centre:Email:custserviec.ch Tel:+41 22 919 02 11 Fax:+41 22 919 03 00 Licensed to/GAMESA EOLICAANSI Store order#X211868 Downloaded:10/5/2005 11:48:54 AM ETSingle user license only.Copying and networking prohibited.INTERNATIONAL STANDARD IEC61400-1 Third edition2005-08 Wind turbines Part 1:Design requirements IEC 2005 Copyright-all rights reserved No part of this publication may be reproduced or utilized in any form or by any means,electronic or mechanical,including photocopying and microfilm,without permission in writing from the publisher.International Electrotechnical Commission,3,rue de Varemb,PO Box 131,CH-1211 Geneva 20,SwitzerlandTelephone:+41 22 919 02 11 Telefax:+41 22 919 03 00 E-mail:inmailiec.ch Web:www.iec.ch XC For price,see current cataloguePRICE CODE Commission Electrotechnique InternationaleInternational Electrotechnical Commission Licensed to/GAMESA EOLICAANSI Store order#X211868 Downloaded:10/5/2005 11:48:54 AM ETSingle user license only.Copying and networking prohibited.2 61400-1 IEC:2005 CONTENTS FOREWORD.5 INTRODUCTION.7 1 Scope.8 2 Normative references.8 3 Terms and definitions.9 4 Symbols and abbreviated terms.17 4.1 Symbols and units.17 4.2 Abbreviations.19 5 Principal elements.19 5.1 General.19 5.2 Design methods.19 5.3 Safety classes.20 5.4 Quality assurance.20 5.5 Wind turbine markings.20 6 External conditions.21 6.1 General.21 6.2 Wind turbine classes.21 6.3 Wind conditions.22 6.4 Other environmental conditions.31 6.5 Electrical power network conditions.32 7 Structural design.33 7.1 General.33 7.2 Design methodology.33 7.3 Loads.33 7.4 Design situations and load cases.34 7.5 Load calculations.39 7.6 Ultimate limit state analysis.39 8 Control and protection system.45 8.1 General.45 8.2 Control functions.45 8.3 Protection functions.46 8.4 Braking system.47 9 Mechanical systems.47 9.1 General.47 9.2 Errors of fitting.48 9.3 Hydraulic or pneumatic systems.48 9.4 Main gearbox.48 9.5 Yaw system.49 9.6 Pitch system.49 9.7 Protection function mechanical brakes.49 9.8 Rolling bearings.49 Licensed to/GAMESA EOLICAANSI Store order#X211868 Downloaded:10/5/2005 11:48:54 AM ETSingle user license only.Copying and networking prohibited.61400-1 IEC:2005 3 10 Electrical system.50 10.1 General.50 10.2 General requirements for the electrical system.50 10.3 Protective devices.50 10.4 Disconnect devices.50 10.5 Earth system.50 10.6 Lightning protection.51 10.7 Electrical cables.51 10.8 Self-excitation.51 10.9 Protection against lightning electromagnetic impulse.51 10.10 Power quality.51 10.11 Electromagnetic compatibility.51 11 Assessment of a wind turbine for site-specific conditions.52 11.1 General.52 11.2 Assessment of the topographical complexity of the site.52 11.3 Wind conditions required for assessment.52 11.4 Assessment of wake effects from neighbouring wind turbines.53 11.5 Assessment of other environmental conditions.54 11.6 Assessment of earthquake conditions.54 11.7 Assessment of electrical network conditions.55 11.