IEEE-C57.18.10-1998-R2003.pdf
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1、 Recognized as an American National Standard (ANSI) The Institute of Electrical and Electronics Engineers, Inc. 345 East 47th Street, New York, NY 10017-2394, USA Copyright 1998 by the Institute of Electrical and Electronics Engineers, Inc. All rights reserved. Published 1998. Printed in the United
2、States of America ISBN 0-7381- No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. IEEE Std C57.18.10-1998(R2003) (Revision and redesignation of ANSI/IEEE C57.18-1964) IEEE Standard Practice
3、s and Requirements for Semiconductor Power Rectifi er Transformers Sponsor Transformers Committee of the IEEE Power Engineering Society Approved 4 February 1999 American National Standards Institute Approved 19 March 1998 IEEE-SA Standards Board Abstract: Practices and requirements for semiconductor
4、 power rectifi er transformers for dedicated loads rated single-phase 300 kW and above and three-phase 500 kW and above are included. Static precipitators, high-voltage converters for dc power transmission, and other nonlinear loads are excluded. Service conditions, both usual and unusual, are speci
5、fi ed, or other standards are referenced as appropriate. Routine tests are specifi ed. An informative annex provides several examples of load loss calculations for transformers when subjected to nonsinusoidal currents, based on calculations provided in the standard. Keywords: eddy current losses, ha
6、rmonic load losses, single-phase transformers, three-phase transformers, three-winding transformers, transformer load losses, two-winding transformers Approved 19 March 1998 Reaffirmed 9 December 2003 American National Standards Institute IEEE Standards documents are developed within the IEEE Societ
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17、btained through the Copyright Clearance Center. Note: Attention is called to the possibility that implementation of this standard may require use of subject matter covered by patent rights. By publication of this standard, no position is taken with respect to the existence or validity of any patent
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19、erved. iii Introduction (This introduction is not part of IEEE Std C57.18.10-1998, IEEE Standard Practices and Requirements for Semiconduc- tor Power Rectifi er Transformers.) Early editions of ANSI C57.18 were written for transformers used with pool cathode mercury arc rectifi ers. The last revisio
20、n date for ANSI C57.18 was 1964. That standard did not refl ect the practices that have devel- oped with the use of semiconductor rectifying or converting devices, nor did it refl ect the latest transformer technology. As a result, much of it is inconsistent with current practices and with other rel
21、ated standards, such as ANSI C34.2 * , that deal with semiconductor converters. This new standard is the result of the deci- sion to write a new rectifi er transformer standard instead of revising the old standard. Suggestions for improvement of these practices will be welcomed. Basic impulse level
22、(BIL) ratings for windings connected to converters are not specifi ed by this standard. There are many practical reasons why windings connected to converters need not have a BIL test or rating. These windings are often high-current, low-voltage windings that will not produce ANSI standard wave- form
23、s when tested. Interleaved windings cannot be impulse tested easily. Usually the converter and the transformer are close coupled in a throat connection and not subject to lightning strikes. The converter usu- ally cannot withstand normal transformer BIL ratings for the winding voltages to which they
24、 are connected. These conditions arent always true, however. If a user wishes to have a BIL rating or test, this may be arranged through commercial negotiations and technical specifi cations that may override this standard. This should also be acknowledged by the transformer manufacturer during the
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