IEC_CISPR_TR_18-1-2010.pdf

TR CISPR 18-1Edition 2.0 2010-06TECHNICAL REPORT Radio interference characteristics of overhead power lines and high-voltage equipment Part 1:Description of phenomena TR CISPR 18-1:2010(E)INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE Copyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,,downloaded on Nov-28-2014 by James Madison.No further reproduction or distribution is permitted.Uncontrolled when printed.THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2010 IEC,Geneva,Switzerland All rights reserved.Unless otherwise specified,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 either IEC or IECs member National Committee in the country of the requester.If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,please contact the address below or your local IEC member National Committee for further information.IEC Central Office 3,rue de Varemb CH-1211 Geneva 20 Switzerland Email:inmailiec.ch Web:www.iec.ch About the IEC The International Electrotechnical Commission(IEC)is the leading global organization that prepares and publishes International Standards for all electrical,electronic and related technologies.About IEC publications The technical content of IEC publications is kept under constant review by the IEC.Please make sure that you have the latest edition,a corrigenda or an amendment might have been published.?Catalogue of IEC publications:www.iec.ch/searchpub The IEC on-line Catalogue enables you to search by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,withdrawn and replaced publications.?IEC Just Published:www.iec.ch/online_news/justpub Stay up to date on all new IEC publications.Just Published details twice a month all new publications released.Available on-line and also by email.?Electropedia:www.electropedia.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/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 Copyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,,downloaded on Nov-28-2014 by James Madison.No further reproduction or distribution is permitted.Uncontrolled when printed.TR CISPR 18-1Edition 2.0 2010-06TECHNICAL REPORT Radio interference characteristics of overhead power lines and high-voltage equipment Part 1:Description of phenomena INTERNATIONAL ELECTROTECHNICAL COMMISSION XBICS 33.100.01 PRICE CODEISBN 978-2-88912-016-1INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE Registered trademark of the International Electrotechnical Commission Copyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,,downloaded on Nov-28-2014 by James Madison.No further reproduction or distribution is permitted.Uncontrolled when printed.2 TR CISPR 18-1 IEC:2010(E)CONTENTS FOREWORD.5 INTRODUCTION.7 1 Scope.8 2 Normative references.8 3 Terms and definitions.8 4 Radio noise from power lines.9 4.1 General.9 4.2 Physical aspects of radio noise.9 4.2.1 Mechanism of formation of a noise field.9 4.2.2 Definition of noise.12 4.2.3 Influence of external parameters.12 4.3 Main characteristics of the noise field resulting from conductor corona.13 4.3.1 General.13 4.3.2 Frequency spectrum.13 4.3.3 Lateral profile.14 4.3.4 Statistical distribution with varying seasons and weather conditions.16 5 Effects of corona from conductors.17 5.1 Physical aspects of corona from conductors.17 5.1.1 General.17 5.1.2 Factors in corona generation.17 5.2 Methods of investigation of corona by cages and test lines.19 5.2.1 General.19 5.2.2 Test cages.19 5.2.3 Test lines.20 5.3 Methods of predetermination.20 5.3.1 General.20 5.3.2 Analytical methods.20 5.3.3 CIGR method.21 5.4 Catalogue of standard profiles.21 5.4.1 General.21 5.4.2 Principle of catalogue presentation.21 6 Radio noise levels due to insulators,hardware and substation equipment (excluding bad contacts).23 6.1 Physical aspects of radio noise sources.23 6.1.1 General.23 6.1.2 Radio noise due to corona discharges at hardware.23 6.1.3 Radio noise due to insulators.23 6.2 Correlation between radio noise voltage and the corresponding field strength for distributed and individual sources.25 6.2.1 General.25 6.2.2 Semi-empirical approach and formula.25 6.2.3 Analytical methods.27 6.2.4 Example of application.28 6.3 Influence of ambient conditions.28 7 Sparking due to bad contacts.28 7.1 Physical aspects of the radio noise phenomenon.28 Copyrighte