IEC_TS_62257-4-2005.pdf

TECHNICAL SPECIFICATION IEC TS 62257-4 First edition2005-07 Recommendations for small renewable energy and hybrid systems for rural electrification Part 4:System selection and design Reference number IEC/TS 62257-4:2005(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.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committees and date of publication.On-line information is also available on recently issued publications,withdrawn and replaced publications,as well as corrigenda.IEC Just Published This summary of recently issued publications(www.iec.ch/online_news/justpub)is also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 MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.TECHNICAL SPECIFICATION IECTS 62257-4 First edition2005-07 Recommendations for small renewable energy and hybrid systems for rural electrification Part 4:System selection and design PRICE CODE 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 XB For price,see current catalogueCommission Electrotechnique InternationaleInternational Electrotechnical Commission LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 TS 62257-4 IEC:2005(E)CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references.7 3 Terms and definitions.8 4 Functional requirements of production and distribution subsystems.9 4.1 Preliminaries.9 4.2 Overall needs to be satisfied.9 4.3 Introduction to subsystems.13 4.4 Functional description of a production subsystem.13 4.5 Functional description of a distribution subsystem.15 4.6 Functional description of a demand subsystem.17 4.7 Constraints to be complied with by production distribution and demand subsystems 17 5 Energy management rules.18 5.1 General.18 5.2 Functional description for an energy management of an isolated system.19 5.3 Demand side management.20 6 Expected results from the sizing process.20 6.1 Introduction.20 6.2 Participants in the sizing process.21 6.3 Elements for comparing various design proposals.21 6.4 Frameworks for proposal.21 6.5 Proposal for a sizing process.38 6.6 Impact of design assumptions on system sizing and cost.38 6.7 Guarantee of results.40 7 Data acquisition rules for system management.40 7.1 Introduction.40 7.2 General.41 7.3 Levels of data acquisition and data necessity.41 7.4 Data to be collected.46 7.5 Operating conditions,electrical and engineering requirements for data acquisition.47 Annex A(informative)Example for detailed performance criteria and levels for a production subsystem.48 Annex B(informative)Example for detailed performance criteria and levels for a distribution subsystem.49 Annex C(informative)Example framework for proposal specification.50 Annex D(informative)Equation for costs calculations.57 Annex E(informative)Proposal for a sizing process.61 Figure 1 Factors involved in the design of a system.10 Figure 2 Functional diagram of a radial structure for rural micro-grid.17 Figure 3 Functional impact of energy management and safety.19 Figure E.1 Sizing process flow chart.61 LICENSED TO MECON Limite