IEC_TS_62344-2013.pdf

IEC/TS 62344 Edition 1.0 2013-01 TECHNICAL SPECIFICATION Design of earth electrode stations for high-voltage direct current(HVDC)links General guidelines IEC/TS 62344:2013(E)colourinsideCopyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,,downloaded on Nov-27-2014 by James Madison.No further reproduction or distribution is permitted.Uncontrolled when printed.THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2013 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 Tel.:+41 22 919 02 11 3,rue de Varemb Fax:+41 22 919 03 00 CH-1211 Geneva 20 infoiec.ch Switzerland 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.Useful links:IEC publications search-www.iec.ch/searchpub The advanced search enables you to find IEC publications by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,replaced and withdrawn publications.IEC Just Published-webstore.iec.ch/justpublished Stay up to date on all new IEC publications.Just Published details all new publications released.Available on-line and also once a month by email.Electropedia-www.electropedia.org The worlds leading online dictionary of electronic and electrical terms containing more than 30 000 terms and definitions in English and French,with equivalent terms in additional languages.Also known as the International Electrotechnical Vocabulary(IEV)on-line.Customer Service Centre-webstore.iec.ch/csc If you wish to give us your feedback on this publication or need further assistance,please contact the Customer Service Centre:csciec.ch.Copyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,,downloaded on Nov-27-2014 by James Madison.No further reproduction or distribution is permitted.Uncontrolled when printed.IEC/TS 62344 Edition 1.0 2013-01 TECHNICAL SPECIFICATION Design of earth electrode stations for high-voltage direct current(HVDC)links General guidelines INTERNATIONAL ELECTROTECHNICAL COMMISSION XC ICS 29.240.99 PRICE CODE ISBN 978-2-83220-575-4 Registered trademark of the International Electrotechnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.colourinsideCopyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,,downloaded on Nov-27-2014 by James Madison.No further reproduction or distribution is permitted.Uncontrolled when printed.2 TS 62344 IEC:2013(E)CONTENTS FOREWORD.7 INTRODUCTION.9 1 Scope.10 2 Normative references.10 3 Terms and definitions.10 3.22 current-releasing density.13 4 System conditions.14 4.1 General principles.14 4.2 System parameters related to earth electrode design.14 4.2.1 Amplitude and duration of the current.14 4.2.2 Polarity.14 4.2.3 Designed lifespan.15 4.2.4 Common earth electrodes.15 5 Design of land electrode stations.15 5.1 Main technical parameters.15 5.1.1 General principles.15 5.1.2 Temperature rise.16 5.1.3 Earthing resistance.16 5.1.4 Step voltage.17 5.1.5 Touch voltage.17 5.1.6 Current density.17 5.1.7 Field intensity in fish ponds.18 5.2 Electrode site selection and parameter measurement.18 5.2.1 General principles.18 5.2.2 Data collection survey.18 5.2.3 Distance from converter station(substation).18 5.2.4 Environment conditions.19 5.2.5 Terrain and landform.19 5.2.6 Measurement of soil parameters.19 5.2.7 Geological exploration.19 5.2.8 Topographical map.19 5.2.9 Values selected during design.19 5.3 Earth electrode and associated components.20 5.3.1 General principles for material selection.20 5.3.2 Selection of feeding rods and characteristics.20 5.3.3 Chemical and physical properties of petroleum coke.21 5.3.4 Current-guiding system.21 5.3.5 Bus.22 5.3.6 Electrode line monitoring device.22 5.4 Electrode arrangement.22 5.4.1 General principles.22 5.4.2 Filling coke.22 5.4.3 Selection of earth electrode shape.22 5.4.4 Earth electrode corridor(right of way).23 5.4.5 Distance between sub-electrodes in the arrangement.23 5.4.6 Burial depth of the earth electrodes.23 Copyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,,downloaded on Nov-27-2014 by James Mad