BS IEC 60076-15-2015 Power transformers Gas-filled power transformers《电力变压器 充气电力变压器》.pdf

1、BSI Standards PublicationPower transformersPart 15: Gas-filled power transformersBS IEC 60076-15:2015National forewordThis British Standard is the UK implementation of IEC 60076-15:2015.The UK participation in its preparation was entrusted to TechnicalCommittee PEL/14, Power transformers.A list of o

2、rganizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2

3、015ISBN 978 0 580 81337 5ICS 29.180Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 July 2015.Amendments/corrigenda issued since publicationDate Text affectedBRI

4、TISH STANDARDBS IEC 60076-15:2015IEC 60076-15 Edition 2.0 2015-04 INTERNATIONALSTANDARD NORMEINTERNATIONALE Power transformers Part 15: Gas-filled power transformers Transformateurs de puissance Partie 15: Transformateurs de puissance isolation gazeuse INTERNATIONALELECTROTECHNICALCOMMISSION COMMISS

5、IONELECTROTECHNIQUEINTERNATIONALE ICS 20.180 ISBN 978-2-8322-2626-1 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veu

6、illez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 IEC 60076-15:2015 IEC 2015 CONTENTS FOREWORD . 4 1 Scope 6 2 Normative references. 6 3 Terms and definitions 7 3.5 Terms, definitions, symbols and units relating to gas and vacuum tightness . 8 4 Service conditions

7、. 8 5 Rating and general requirements . 8 5.1 Rated power . 8 5.1.1 General . 8 5.1.2 Preferred values of rated power 9 5.1.3 Minimum power under alternative cooling modes 9 5.1.4 Loading beyond rated power 9 5.2 Cooling mode 9 5.2.1 General . 9 5.2.2 Identification symbols . 10 5.2.3 Transformers w

8、ith alternative cooling methods 10 5.3 Temperature-rise limits 10 5.3.1 Classification and insulation system temperature 10 5.3.2 Normal temperature-rise limits 11 5.3.3 Reduced temperature-rises for transformers designed for high cooling air temperatures or special air cooling conditions . 11 5.3.4

9、 High altitude temperature-rise correction 11 5.3.5 Reduced temperature-rise for transformers designed for high cooling water temperatures 12 5.3.6 Temperature rise during specified load cycle 12 5.4 Insulation level 12 5.5 Load rejection on transformers directly connected to a generator . 12 5.6 Ra

10、ted voltage and rated frequency 12 5.7 Provision for unusual service conditions 12 5.8 Highest voltage for equipment Umand dielectric tests levels 12 5.9 Additional information required for enquiry . 12 5.10 Components and materials 12 5.11 Requirements for gases and gas tightness . 13 5.11.1 Requir

11、ements for gases . 13 5.11.2 Gas tightness . 13 6 Requirements for transformers having a tapped winding . 13 7 Connection phase displacement symbols . 13 8 Rating plates . 13 8.1 General . 13 8.2 Information to be given in all cases 13 8.3 Additional information to be given when applicable 14 9 Safe

12、ty, environmental and other requirements 15 9.1 Safety and environmental requirements . 15 9.1.1 Gas leaks 15 9.1.2 Safety considerations . 15 9.2 Dimensioning of neutral connection . 16 BS IEC 60076-15:2015IEC 60076-15:2015 IEC 2015 3 9.3 Handling procedure for SF6. 16 9.4 d.c. currents in neutral

13、circuits . 16 9.5 Centre of gravity marking 16 10 Tolerances 16 11 Tests . 16 11.1 General requirements for routine, type and special tests 16 11.1.1 General . 16 11.1.2 Routine tests 17 11.1.3 Type tests 18 11.1.4 Special tests 18 11.2 Measurement of short-circuit impedance and load loss . 19 11.3

14、Leak testing with pressure (tightness test) . 19 11.4 Pressure tests for tanks . 19 11.5 Temperature-rise test 20 11.5.1 General . 20 11.5.2 Corrections 20 11.6 Measurement of sound level 20 11.6.1 General . 20 11.6.2 Prescribed contour . 21 12 Electromagnetic compatibility (EMC) 21 13 High frequenc

15、y switching transients . 21 14 Earthing terminal . 21 15 Information required with enquiry and order 21 Annex A (informative) Check list of information to be provided with enquiry and order 22 A.1 Rating and general data 22 A.1.1 Normal information . 22 A.1.2 Special information 23 A.2 Parallel oper

16、ation 25 Annex B (informative) Transient loading Mathematical model 26 B.1 General . 26 B.2 Mathematical model for temperature distribution in a winding of a gas-filled power transformer The hot-spot concept . 26 Annex C (informative) Gauges, indicators and relays for gas-filled power transformers .

17、 28 Bibliography . 29 Figure B.1 Temperature distribution model . 26 Table 1 Classification and insulation system temperature . 11 Table 2 Winding temperature-rise limits 11 Table 3 Exponents for the corrections of temperature rise test results . 20 Table C.1 Comparison of gauges, indicators and rel

18、ays between gas-filled power transformers and oil-immersed power transformers 28 BS IEC 60076-15:2015 4 IEC 60076-15:2015 IEC 2015 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ POWER TRANSFORMERS Part 15: Gas-filled power transformers FOREWORD 1) The International Electrotechnical Commission (IEC) is

19、a worldwide 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 o

20、ther 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 th

21、e subject 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 conditio

22、ns 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 Nationa

23、l Committees. 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 i

24、n which 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 Pu

25、blication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC

26、is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its t

27、echnical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other

28、IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the su

29、bject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60076-15 has been prepared by IEC technical committee 14: Power transformers. This second edition of IEC 60076-15 cancels and replaces the first edition published in 20

30、08 and constitutes a technical revision. The following main technical changes from the first edition are: Modified in accordance with the related revised standards of IEC 60076-1, IEC 60076-2, IEC 60076-3 and related items of SF6gas in the revised standard of “High-voltage switchgear and controlgear

31、” Added the clause “minimum power under alternative cooling modes” Added the clause “safety, environmental and other requirements” Added the clause “d.c. currents in neutral circuits” Added the clause “electromagnetic compatibility (EMC)” Added the clause “high frequency switching transients” BS IEC

32、 60076-15:2015IEC 60076-15:2015 IEC 2015 5 The text of this standard is based on the following documents: FDIS Report on voting 14/811/FDIS 14/818/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication

33、has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts in the IEC 60076 series, published under the general title Power transformers, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stab

34、ility date indicated on the IEC website under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. BS IEC 60076-15:2015 6 IEC 60076-15:2015 IEC 2015 POWER TRANSFORMERS Part 15

35、: Gas-filled power transformers 1 Scope This part of IEC 60076 applies to three-phase and single-phase gas-filled power transformers (including auto-transformers) with the exception of certain categories of small and special transformers such as: single-phase transformers with rated power less than

36、1 kVA and three-phase transformers less than 5 kVA; transformers, which have no windings with rated voltage higher than 1 000 V; instrument transformers; traction transformers mounted on rolling stock; starting transformers; testing transformers; welding transformers. When IEC standards do not exist

37、 for such categories of transformers (in particular transformer having no winding exceeding 1 000 V for industrial applications), this part of IEC 60076 may still be applicable either as a whole or in part. This standard does not address the requirements that would make a transformer suitable for mo

38、unting in a position accessible to the general public. For those categories of power transformers and reactors which have their own IEC standards, this part is applicable only to the extent in which it is specifically called up by cross-reference in the other standard. Such standards exist for: reac

39、tors in general (IEC 60076-6); self-protected transformers (IEC 60076-13); transformers for wind turbine applications (IEC 60076-16); traction transformers and traction reactors (IEC 60310); converter transformers for industrial applications (IEC 61378-1); converter transformers for HVDC application

40、s (IEC 61378-2). At several places in this part it is specified or recommended that an agreement should be reached concerning alternative or additional technical solutions or procedures. Such agreement is made between the manufacturer and the purchaser. The matters should preferably be raised at an

41、early stage and the agreements included in the contract specification. NOTE This standard can be applicable to the gas parts of a transformer in which an insulating gas is used with an insulating liquid. 2 Normative references The following documents, in whole or in part, are normatively referenced

42、in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60076-1:2011, Power transformers Part 1: General BS IEC 60076-15:2015IEC 600

43、76-15:2015 IEC 2015 7 IEC 60076-2:2011, Power transformers Part 2: Temperature rise for liquid-immersed transformers IEC 60076-3, Power transformers Part 3: Insulation levels, dielectric tests and external clearances in air IEC 60076-5, Power transformers Part 5: Ability to withstand short circuit I

44、EC 60076-10, Power transformers Part 10: Determination of sound levels IEC 60137, Insulated bushings for alternating voltages above 1 000 V IEC 60376, Specification of technical grade sulfur hexafluoride (SF6) for use in electrical equipment IEC 60480, Guidelines for the checking and treatment of su

45、lfur hexafluoride (SF6) taken from electrical equipment and specification for its re-use IEC 62271-1, High-voltage switchgear and controlgear Part 1: Common specifications IEC 62271-4:2002, High-voltage switchgear and controlgear Part 4: Handling procedures for sulphur hexafluoride (SF6) and its mix

46、tures 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. NOTE Other terms use the meanings ascribed to them in IEC 60076-1, 2, 3, 5 and 10, or in the IEC 60050 series. 3.1 gas-filled power transformer transformer of which the magnetic circuit and wi

47、ndings are placed in an enclosure filled with an insulating gas Note 1 to entry: Generally sulfur hexafluoride (SF6) gas is used, and sometimes this transformer is called a gas-insulated transformer. 3.2 rated gas pressure gas pressure (gauge pressure) at 20 C designed for use in a gas-filled power

48、transformer 3.3 guaranteed minimum gas pressure minimum gas pressure (gauge pressure) at 20 C, which is able to guarantee the insulation of a gas-filled power transformer Note 1 to entry: Transformer of which the magnetic circuit and windings are placed in an enclosure or a vessel filled with an ins

49、ulating liquid such as perfluorocarbon, natural ester, synthetic ester, silicon oil and vegetable oil should be considered a liquid-immersed type transformer. 3.4 design pressure of tanks relative pressure used to determine the design of the tanks Note 1 to entry: It is at least equal to the maximum pressure in the tank at the highest temperature that the gas can reach under specified maximum service condition. BS IEC 60076-15:2015 8 IEC 60