IEC-TR-61000-2-14-2006.pdf
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1、 TECHNICAL REPORT IEC TR 61000-2-14 First edition 2006-12 Electromagnetic compatibility (EMC) Part 2-14: Environment Overvoltages on public electricity distribution networks Reference number IEC/TR 61000-2-14:2006(E) Copyright International Electrotechnical Commission Provided by IHS under license w
2、ith IECLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/09/2007 23:29:17 MSTNo reproduction or networking permitted without license from IHS -,-,- Publication numbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 series. For example,
3、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 i
4、ncorporating 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 t
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8、n. 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 Copyright International Electrotechnical Commission Provided by IHS under license
9、with IECLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/09/2007 23:29:17 MSTNo reproduction or networking permitted without license from IHS -,-,- TECHNICAL REPORT IEC TR 61000-2-14 First edition 2006-12 Electromagnetic compatibility (EMC) Part 2-14: Environment Overvoltages
10、on public electricity distribution networks 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 mechanical, including photocopying and microfilm, without permission in writing from the publisher. Int
11、ernational 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 X For price, see current catalogue Commission Electrotechnique Internationale International Electrotechnical
12、 Commission Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/09/2007 23:29:17 MSTNo reproduction or networking permitted without license from IHS -,-,- 2 TR 61000-2-14 IEC:2006(E) CONTENT
13、S FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references .7 3 Terms and definitions .7 4 Description of overvoltages 10 4.1 General.10 4.2 External overvoltages11 4.3 Internal overvoltages.11 4.4 Overvoltage waveshape 11 5 Long duration overvoltages 12 5.1 Sustained earth faults12 5.2 Broken neu
14、tral on LV network12 5.3 Maloperation of voltage regulating equipment13 5.4 Overvoltages due to voltage unbalances .13 5.5 Dispersed generation 14 6 Short duration overvoltages15 6.1 Earth faults15 6.2 Load rejection (sudden load loss)16 6.3 Self-excitation .16 6.4 Resonance and ferroresonance.16 7
15、Very short duration overvoltages (transients)18 7.1 General description .18 7.2 Lightning .19 7.3 Switching 20 7.4 Summary of surge duration and cause.26 8 Effects of overvoltages on equipment .27 8.1 General considerations27 8.2 Reduction in life of filament lamps.28 8.3 Effect of overvoltages on I
16、T equipment28 9 Case studies 29 9.1 General.29 9.2 Switching of LV power factor correction capacitor29 9.3 Metal fusion furnace30 9.4 Switching of MV power factor correction capacitor.31 9.5 DC traction system32 9.6 Load switching 34 10 Protection against the effects of overvoltages.36 10.1 General
17、considerations36 10.2 Point on wave switching 36 10.3 Arcing horns and spark gaps .37 10.4 Overvoltage protection relays38 10.5 Snubbers (high frequency RC filter).38 10.6 Uninterruptible power supply (UPS) systems .39 Copyright International Electrotechnical Commission Provided by IHS under license
18、 with IECLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/09/2007 23:29:17 MSTNo reproduction or networking permitted without license from IHS -,-,- TR 61000-2-14 IEC:2006(E) 3 10.7 Surge protection device (SPD) 39 11 Conclusions41 12 Recommendations42 Bibliography43 Figure 1
19、Lightning impulse test voltage characteristic 11 Figure 2 Broken neutral on LV network 13 Figure 3 The effect of distributed generation on network voltage14 Figure 4 Line Neutral temporary overvoltage on healthy phase for single phase line earth fault 15 Figure 5 Typical transient overvoltage when e
20、nergizing a capacitor bank.22 Figure 6 Notching caused by power electronics switching 24 Figure 7 ITI (CBEMA) curve for equipment connected to 120 V 60 Hz systems 29 Figure 8 Voltage waveform distorted by the energization of a PFC capacitor .30 Figure 9 Phase to ground overvoltage in case of a singl
21、e (a) or multiple (b) faults .30 Figure 10 Equivalent circuit31 Figure 11 Extruder connection single line diagram 32 Figure 12 Current waveforms (phases A and C) taken at the main LV circuit breaker.32 Figure 13 Single line diagram of public transportation system 33 Figure 14 Voltage waveforms assoc
22、iated with overvoltages on public transportation system34 Figure 15 20 kV line-to-earth voltages during breaking transformer current35 Figure 16 Spark gap 37 Figure 17 Two-stage surge protection scheme.40 Table 1 Surges on the low voltage network 26 Table 2 Surges on the medium voltage network .27 T
23、able 3 Reduction of filament lamp life 28 Table 4 Protective levels for typical MV surge arresters (effectively earthed neutral systems).41 Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 0
24、3/09/2007 23:29:17 MSTNo reproduction or networking permitted without license from IHS -,-,- 4 TR 61000-2-14 IEC:2006(E) INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTROMAGNETIC COMPATIBILITY (EMC) Part 2-14: Environment Overvoltages on public electricity distribution networks FOREWORD 1) The Int
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