IEC-TS-62257-9-2-2006.pdf
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1、 TECHNICAL SPECIFICATION IEC TS 62257-9-2 First edition 2006-10 Recommendations for small renewable energy and hybrid systems for rural electrification Part 9-2: Microgrids Reference number IEC/TS 62257-9-2:2006(E) Publication numbering As from 1 January 1997 all IEC publications are issued with a d
2、esignation 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 incorpo
3、rating 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 publicati
4、on, 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
5、 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 pu
6、blication. On-line information is also available on recently issued publications, withdrawn and replaced publications, as well as corrigenda.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 Serv
7、ice 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 -,-,- TECHNICAL SPECIFICATION IEC TS
8、62257-9-2 First edition 2006-10 Recommendations for small renewable energy and hybrid systems for rural electrification Part 9-2: Microgrids PRICE CODE IEC 2006 Copyright - all rights reserved No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechan
9、ical, 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, Switzerland Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmailiec.ch Web: www.iec.ch XA For pric
10、e, see current catalogue Commission Electrotechnique Internationale International Electrotechnical Commission -,-,- 2 TS 62257-9-2 IEC:2006(E) CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative reference.7 3 Terms and definitions .7 4 General 9 4.1 Limits of a microgrid9 4.2 Voltage drops9 4.3
11、 Composition of a microgrid9 5 Protection against electric shocks.11 6 Protection against overcurrents 11 7 Selection and erection of equipment.11 7.1 Equipment installation .11 7.2 Operational conditions and external influences11 7.3 Characteristics of lines 13 7.4 Cables.14 7.5 Poles.14 7.6 Cable
12、anchorage.17 7.7 Connections and accessories 17 7.8 Where poles are used for other purposes 19 7.9 Isolation and switching 19 7.10 Earthing arrangement, protective conductors and protective bonding conductors 20 8 Verification and acceptance22 8.1 General.22 8.2 Supervision of works .22 8.3 Verifica
13、tion before commissioning (on site acceptance).22 8.4 Operation tests23 Annex A (informative) Characteristics of cables 24 Annex B (informative) Maximum circuit length.26 Figure 1 Microgrid limits.9 Figure 2 Microgrid consisting of a single-phase feeder.10 Figure 3 Three phase system output, single
14、phase distribution or three phase service provided where needed.10 Figure 4 Three phase system output, single phase distribution 11 Figure 5 Diagram showing installation of twinned wooden poles forming an angle .16 Figure 6 Examples of different pole arrangements .16 Figure 7 Example of an overhead
15、line16 Figure 8 Connection mode diagram19 Figure 9 Microgrid earthing scheme .21 -,-,- TS 62257-9-2 IEC:2006(E) 3 Table 1 Maximum values of voltage drops9 Table 2 Fuse ratings for protection from short-circuiting in 230 V a.c. microgrids (overhead lines)20 Table 3 Fuse ratings for protection from sh
16、ort-circuiting in 120 V a.c. microgrids (overhead lines)20 Table 4 Circuit breaker ratings for protection from short-circuiting in microgrids (overhead lines)20 Table 5 Characteristics of earthing components.22 Table A.1 Example of characteristics of grid conductors for overhead lines (insulated twi
17、sted conductors without carrier neutral)24 -,-,- 4 TS 62257-9-2 IEC:2006(E) INTERNATIONAL ELECTROTECHNICAL COMMISSION _ RECOMMENDATIONS FOR SMALL RENEWABLE ENERGY AND HYBRID SYSTEMS FOR RURAL ELECTRIFICATION Part 9-2: Microgrids FOREWORD 1) The International Electrotechnical Commission (IEC) is a wo
18、rldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other
19、 activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the su
20、bject dealt with may participate in this preparatory work. International, governmental and non- governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions
21、determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National C
22、ommittees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in w
23、hich they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publi
24、cation and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure
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