1、Power transformers Part 4:Guide to the lightning impulse andswitching impulse testing Power transformers and reactorsReference numberIEC 60076-4:2002(E)INTERNATIONALSTANDARDIEC60076-4First edition2002-06This English-language version is derived from the originalbilingual publication by leaving out al
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8、he Customer Service Centre:Email:custserviec.ch Tel:+41 22 919 02 11 Fax:+41 22 919 03 00 Power transformers Part 4:Guide to the lightning impulse andswitching impulse testing Power transformers and reactorsFor price,see current catalogue IEC 2002 Copyright-all rights reservedNo part of this publica
9、tion 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 T
10、elefax:+41 22 919 03 00 E-mail:inmailiec.ch Web:www.iec.chINTERNATIONALSTANDARDIEC60076-4First edition2002-06XBCommission Electrotechnique InternationaleInternational Electrotechnical Commission PRICE CODE60076-4 IEC:2002 3 CONTENTSFOREWORD.7 1 Scope.11 2 Normative references.11 3 General.13 4 Speci
11、fied waveshapes.13 5 Test circuit.13 6 Calibration.17 7 Lightning impulse tests.177.1Waveshapes.177.2Impulses chopped on the tail.197.3Terminal connections and applicable methods of failure detection.217.4Test procedures.237.5Recording of tests.25 8 Switching impulse tests.318.1Special requirements.
12、318.2Transformers.318.3Reactors.39 9 Interpretation of oscillograms or digital recordings.439.1Lightning impulse.439.2Switching impulse.4710Digital processing,including transfer function analysis.4911Impulse test reports.53Annex A(informative)Principles of waveshape control.63Annex B(informative)Typ
13、ical oscillograms and digital recordings.77Figure 1 Typical impulse test circuit.55Figure 2 Lightning impulse test terminal connections and applicable methodsof failure detection.57Figure 3 Transformer and reactor switching impulse waveshapes.59Figure 4 Switching impulse test terminal connections an
14、d methodsof failure detection.61Figure A.1 Waveshape control for high-impedance windings.63Figure A.2 Wavetail control for low impedance windings.67Figure A.3 Damped oscillation.69Figure A.4 Effects due to short length of wavetail.73Figure A.5 Winding earthed through a resistor.75Figure A.6 Resistan
15、ce earthing of low-impedance windings.75Figure B.1 Lightning impulse,full-wave failure Line-to-neutral breakdownacross high-voltage winding of 400 kV generator transformer.81Figure B.2 Lightning impulse,full-wave failure Breakdown between discsat entrance to high-voltage winding of 115 kV transforme
16、r.8360076-4 IEC:2002 5 Figure B.3 Lightning impulse,interlayer breakdown in coarse-step tapping windingof a 400/220 kV transformer.85Figure B.4 Lightning impulse,full-wave failure Breakdown between leadsof two 1,1%sections of outside tapping winding of 400 kV generator transformer.87Figure B.5 Lightning impulse,full-wave failure Breakdown short-circuitingone section of the fine-step tapping winding of a 220 kV transformer.89Figure B.6 Lightning impulse,full-wave failure Breakdown between paralle
