1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 61378-1:2011Convertor transformersPart 1: Transformers for industrialapplicationsIncorporating corrigendum January 2012BS EN 61378-1:2011National forewordThis British Stand
2、ard is the UK implementation of EN 61378-1:2011. It is identical to IEC 61378-1:2011, incorporating corrigendum January 2012. It supersedes BS EN 61378-1:1999 which will be withdrawn on 30 August 2014.The UK participation in its preparation was entrusted to Technical Committee PEL/14, Power transfor
3、mers.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2012. Published by BSI
4、Standards Limited 2012.ISBN 978 0 580 78590 0ICS 29.180Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2012.Amendments/corrigenda issued since publica
5、tionDate Text affectedImplementation of IEC corrigendum January 2012:Replaced formulas H.1 and H.2BRITISH STANDARD30 April 2012 EUROPEAN STANDARD EN 61378-1 NORME EUROPENNE EUROPISCHE NORM November 2011 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation El
6、ectrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61378-1:2011 E ICS 29.180 Supersedes EN 61378-1:1998 + cor
7、r. Nov.1998English version Convertor transformers - Part 1: Transformers for industrial applications (IEC 61378-1:2011) Transformateurs de conversion - Partie 1: Transformateurs pour applications industrielles (CEI 61378-1:2011) Stromrichtertransformatoren - Teil 1: Transformatoren fr industrielle A
8、nwendungen (IEC 61378-1:2011) This European Standard was approved by CENELEC on 2011-08-30. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-d
9、ate lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by transl
10、ation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, De
11、nmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. - 2 - Foreword The text of document 14/686/FDIS, future
12、 edition 2 of IEC 61378-1, prepared by IEC/TC 14, “Power transformers“, was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 61378-1:2011. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical n
13、ational standard or by endorsement (dop) 2012-05-30 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2014-08-30 This document supersedes EN 61378-1:1998 + corr. Nov.1998. EN 61378-1:2011 includes the following significant technical changes with res
14、pect to EN 61378-1:1998 + corr. Nov.1998: addition of winding connections (zig-zag, extended delta, etc.) with phase displacement (1) for harmonic current circulating in phase opposition in both windings. x could be derived from either a computation or an implementation when possible, of a short-cir
15、cuit test between valve windings. IEC 1724/11 BS EN 61378-1:2011 EN 61378-1:2011 (E) 25 A B CL VL VY Key A winding arrangement in the core window B leakage flux produced by harmonics in phase C leakage flux produced by harmonics with 180 phase displacement L line winding V valve windings Figure 6 Le
16、akage fields for a three winding transformer with loosely coupled double-tier valve windings Coefficient WE1h WE1PPequals: Line winding: 1 Valve windings: 1 for harmonic current circulating in phase in both windings x for harmonic current circulating in phase opposition in both windings. x could be
17、derived from either a computation or an implementation when possible, of a short-circuit test between valve windings. IEC 1725/11 BS EN 61378-1:2011 EN 61378-1:2011 (E) 26 6.5 Losses in interphase transformers, current-balancing reactors, series-smoothing reactors and transductors 6.5.1 General When
18、 interphase transformers, current-balancing reactors, series-smoothing reactors and transductors are integral parts of a transformer for connection to a static converter, the losses of these components shall be derived as stated below. NOTE The rules laid down in this subclause do not imply specific
19、ation of the individual pieces of equipment in the context of a standard. 6.5.2 Interphase transformers The manufacturer shall supply the calculated iron losses at a frequency equal to the normal service frequency of the interphase transformer, and at a voltage calculated to provide the magnetic flu
20、x corresponding to operation of the converter at rated current, voltage and specified phase control. Data about current unbalance shall be discussed and agreed upon between the purchaser and the manufacturer. Capability to withstand the unbalance shall be demonstrated by calculation. The losses in t
21、he winding shall be calculated as the product of the d.c. resistance and the square of the direct current in the winding. 6.5.3 Current-balancing reactors The iron losses in current-balancing reactors are small and may be ignored. NOTE The losses in the winding are either a part of the converter los
22、s measurement, or are calculated as the product of the d.c. measured resistance and the square of the r.m.s. current in the winding. 6.5.4 Series-smoothing reactors In general, reference shall be made to IEC 60076-6. The iron losses caused by harmonic ripple current components are small and may be i
23、gnored. NOTE The losses in the winding are either part of the converter loss measurement, or are calculated as the product of the d.c. resistance and the square of the direct current in the winding. 6.5.5 Transductors Transductors are devices that allow a continuous and fine regulation of the d.c. v
24、oltage generated by the converter within a specified range. They are usually applied in conjunction with a.c. d.c. diode based converters. The degree of saturation in groups of magnetic cores determines the voltage drop in the transductors. A polarizing d.c. current imposed in auxiliary windings on
25、the transductors governs the degree of saturation in the cores. A control circuit with or without an additional bias circuit governs the d.c. current. The voltage regulation is obtained by varying the d.c. current. The choice between control circuit with or without bias circuit depends on the conver
26、ter control system design. Transductors installed in converter transformers could be of two different types: Wound core: Transductors of this type are installed on the HV side of the converter transformer and they are series connected to the HV windings. Pass-through bar: Transductors of this type are installed on the LV connection bars system of the converter transformer and in such a way that each transductor is series connected directly to each converter valve arm. They are generally based on toroidal cores. BS EN 61378-1:2011 EN 61378-1:2011 (E)
