EN 60071-5-2015 en Insulation co-ordination - Part 5 Procedures for high-voltage direct current (HVDC) converter stations.pdf

1、BSI Standards PublicationInsulation co-ordinationPart 5: Procedures for high-voltage direct current (HVDC) converter stationsBS EN 60071-5:2015National forewordThis British Standard is the UK implementation of EN 60071-5:2015. It isidentical to IEC 60071-5:2014.The UK participation in its preparatio

2、n was entrusted to TechnicalCommittee GEL/28, Electrical Insulation Co-ordination.A list of organizations 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 cor

3、rect application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 76515 5ICS 29.080.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strate

4、gy Committee on 31 January 2015.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 60071-5:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60071-5 January 2015 ICS 29.080.30 English Version Insulation co-ordination - Part 5: Procedures for high-voltage dir

5、ect current (HVDC) converter stations (IEC 60071-5:2014) Coordination de lisolement - Partie 5: Procdures pour les stations de conversion courant continu haute tension (CCHT) (IEC 60071-5:2014) Isolationskoordination - Teil 5: Verfahren fr Hochspannungs-Gleichstrom-Stromrichterstationen (HG-Stromric

6、hterstationen) (IEC 60071-5:2014) This European Standard was approved by CENELEC on 2014-11-28. 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-

7、to-date 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 tr

8、anslation 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

9、, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Euro

10、pean Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwid

11、e for CENELEC Members. Ref. No. EN 60071-5:2015 E BS EN 60071-5:2015EN 60071-5:2015 - 2 - Foreword The text of document 28/218/FDIS, future edition 1 of IEC 60071-5, prepared by IEC/TC 28 “Insulation co-ordination“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60071-5:

12、2015. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2015-08-28 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2017

13、-11-28 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 60071-5:2014 was

14、approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60099-5:1996 NOTE Harmonized as EN 60099-5:1996 1)(modified). IEC 60505:2011 NOTE Harmonized as EN 60505:2011 (not mod

15、ified). IEC 60721-3-0:1984 NOTE Harmonized as EN 60721-3-0:1993 (not modified). IEC/TR 60919-2:2008 NOTE Harmonized as CLC/TR 60919-2:2010 (not modified). IEC 60700-1:1998 NOTE Harmonized as EN 60700-1:1998 (not modified). IEC 60700-1:1998/A1:2003 NOTE Harmonized as EN 60700-1:1998/A1:2003 (not modi

16、fied). IEC 60700-1:1998/A2:2008 NOTE Harmonized as EN 60700-1:1998/A2:2008 (not modified). 1)Superseded by EN 60099-5:2013 (IEC 60099-5:2013) - DOW = 2016-06-26. BS EN 60071-5:2015- 3 - EN 60071-5:2015 Annex ZA (normative) Normative references to international publications with their corresponding E

17、uropean publications The following documents, in whole or in part, are normatively referenced 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 amendme

18、nts) applies. NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu Publication Year Tit

19、le EN/HD Year IEC 60060-1 - High-voltage test techniques - Part 1: General definitions and test requirements EN 60060-1 - IEC 60071-1 2006 Insulation co-ordination - Part 1: Definitions, principles and rules EN 60071-1 2006 IEC 60071-2 1996 Insulation co-ordination - Part 2: Application guide EN 600

20、71-2 1997 IEC 60099-4 (mod) 2004 Surge arresters - Part 4: Metal-oxide surge arresters without gaps for a.c. systems EN 60099-4 2004 IEC 60633 - Terminology for high-voltage direct current (HVDC) transmission EN 60633 - IEC/TS 60815-1 2008 Selection and dimensioning of high-voltage insulators intend

21、ed for use in polluted conditions - Part 1: Definitions, information and general principles IEC/TS 60815-2 2008 Selection and dimensioning of high-voltage insulators intended for use in polluted conditions - Part 2: Ceramic and glass insulators for a.c. systems - - IEC/TS 60815-3 2008 Selection and

22、dimensioning of high-voltage insulators intended for use in polluted conditions - Part 3: Polymer insulators for a.c. systems - - BS EN 60071-5:2015 2 IEC 60071-5:2014 IEC 2014 CONTENTS INTRODUCTION . 8 1 General . 9 1.1 Scope . 9 1.2 Additional background . 9 2 Normative references . 10 3 Terms and

23、 definitions. 10 4 Symbols and abbreviations 16 4.1 General . 16 4.2 Subscripts . 16 4.3 Letter symbols . 16 4.4 Abbreviations 17 5 Typical HVDC converter station schemes . 17 6 Principles of insulation co-ordination 21 6.1 General . 21 6.2 Essential differences between a.c. and d.c. systems 21 6.3

24、Insulation co-ordination procedure . 21 6.4 Comparison of withstand voltage selection in a.c. and d.c. systems . 22 7 Voltages and overvoltages in service 24 7.1 Continuous operating voltages at various locations in the converter station 24 7.2 Peak continuous operating voltage (PCOV) and crest cont

25、inuous operating voltage (CCOV) . 28 7.3 Sources and types of overvoltages 30 7.4 Temporary overvoltages 31 7.4.1 General . 31 7.4.2 Temporary overvoltages on the a.c. side 31 7.4.3 Temporary overvoltages on the d.c. side 31 7.5 Slow-front overvoltages . 31 7.5.1 General . 31 7.5.2 Slow-front overvo

26、ltages on the a.c. side . 31 7.5.3 Slow-front overvoltages on the d.c. side . 32 7.6 Fast-front, very-fast-front and steep-front overvoltages 33 8 Arrester characteristics and stresses 34 8.1 Arrester characteristics . 34 8.2 Arrester specification. 35 8.3 Arrester stresses . 35 8.3.1 General . 35 8

27、.3.2 AC bus arrester (A) 36 8.3.3 AC filter arrester (FA) . 37 8.3.4 Transformer valve winding arresters (T) . 37 8.3.5 Valve arrester (V) . 37 8.3.6 Bridge arrester (B) . 40 8.3.7 Converter unit arrester (C) . 41 8.3.8 Mid-point d.c. bus arrester (M) . 41 8.3.9 Converter unit d.c. bus arrester (CB)

28、 42 8.3.10 DC bus and d.c. line/cable arrester (DB and DL/DC) . 42 BS EN 60071-5:2015IEC 60071-5:2014 IEC 2014 3 8.3.11 Neutral bus arrester (E, EL, EM in Figure 3, EB, E1, EL, EM in Figure 1) 42 8.3.12 DC reactor arrester (DR) 43 8.3.13 DC filter arrester (FD) 44 8.3.14 Earth electrode station arre

29、ster 44 8.4 Protection strategy 44 8.4.1 General . 44 8.4.2 Insulation directly protected by a single arrester . 44 8.4.3 Insulation protected by more than one arrester in series . 45 8.4.4 Valve side neutral point of transformers . 45 8.4.5 Insulation between phase conductors of the converter trans

30、former . 45 8.4.6 Summary of protection strategy 45 8.5 Summary of events and stresses . 47 9 Design procedure of insulation co-ordination 49 9.1 General . 49 9.2 Arrester requirements 49 9.3 Characteristics of insulation. 51 9.4 Representative overvoltages (Urp) . 51 9.5 Determination of the co-ord

31、ination withstand voltages (Ucw) 52 9.6 Determination of the required withstand voltages (Urw) 52 9.7 Determination of the specified withstand voltage (Uw) . 54 10 Study tools and system modelling 54 10.1 General . 54 10.2 Study approach and tools 54 10.3 System details . 55 10.3.1 Modelling and sys

32、tem representation 55 10.3.2 AC network and a.c. side of the HVDC converter station . 57 10.3.3 DC overhead line/cable and earth electrode line details 58 10.3.4 DC side of an HVDC converter station details . 58 11 Creepage distances . 59 11.1 General . 59 11.2 Base voltage for creepage distance . 5

33、9 11.3 Creepage distance for outdoor insulation under d.c. voltage 59 11.4 Creepage distance for indoor insulation under d.c. or mixed voltage 60 11.5 Creepage distance of a.c. insulators 60 12 Clearances in air 60 Annex A (informative) Example of insulation co-ordination for conventional HVDC conve

34、rters . 62 A.1 General . 62 A.2 Arrester protective scheme 62 A.3 Arrester stresses, protection and insulation levels 62 A.3.1 General . 62 A.3.2 Slow-front overvoltages transferred from the a.c. side 63 A.3.3 Earth fault between valve and upper bridge transformer bushing 63 A.4 Transformer valve si

35、de withstand voltages . 66 A.4.1 Phase-to-phase . 66 A.4.2 Upper bridge transformer phase-to-earth (star). 67 A.4.3 Lower bridge transformer phase-to-earth (delta) . 67 A.5 Air-insulated smoothing reactors withstand voltages 67 A.5.1 Terminal-to-terminal slow-front overvoltages 67 BS EN 60071-5:2015

36、 4 IEC 60071-5:2014 IEC 2014 A.5.2 Terminal-to-earth . 68 A.6 Results . 68 Annex B (informative) Example of insulation co-ordination for capacitor commutated converters (CCC) and controlled series capacitor converters (CSCC) . 72 B.1 General . 72 B.2 Arrester protective scheme 72 B.3 Arrester stress

37、es, protection and insulation levels 72 B.3.1 General . 72 B.3.2 Transferred slow-front overvoltages from the a.c. side 73 B.3.3 Earth fault between valve and upper bridge transformer bushing 74 B.4 Transformer valve side withstand voltages . 77 B.4.1 Phase-to-phase . 77 B.4.2 Upper bridge transform

38、er phase-to-earth (star). 77 B.4.3 Lower bridge transformer phase-to-earth (delta) . 77 B.5 Air-insulated smoothing reactors withstand voltages 78 B.5.1 Slow-front terminal-to-terminal overvoltages . 78 B.5.2 Terminal-to-earth . 78 B.6 Results . 79 Annex C (informative) Considerations for insulation

39、 co-ordination of some special converter configurations 87 C.1 Procedure for insulation co-ordination of back-to-back type of HVDC links . 87 C.2 Procedure for insulation co-ordination of parallel valve groups . 87 C.2.1 General . 87 C.2.2 AC bus arrester (A) 88 C.2.3 AC filter arrester (FA) . 88 C.

40、2.4 Valve arrester (V) . 88 C.2.5 Bridge arrester (B) and converter unit arrester (C) 88 C.2.6 Mid-point arrester (M) 88 C.2.7 Converter unit d.c. bus arrester (CB) 88 C.2.8 DC bus and d.c. line/cable arrester (DB and DL) 89 C.2.9 Neutral bus arrester (E) . 89 C.2.10 DC reactor arrester (DR) 89 C.2.

41、11 DC filter arrester (FD) 89 C.2.12 New converter stations with parallel valve groups . 89 C.3 Procedure for insulation co-ordination of upgrading existing systems with series-connected valve groups 89 C.3.1 General . 89 C.3.2 AC bus arrester (A) 90 C.3.3 AC filter arrester (FA) . 90 C.3.4 Valve ar

42、rester (V) . 90 C.3.5 Bridge arrester (B) and converter unit arrester (C) 90 C.3.6 Mid-point arrester (M) 90 C.3.7 Converter unit d.c. bus arrester (CB), d.c. bus and d.c. line/cable arrester (DB and DL) 91 C.3.8 Neutral bus arrester (E) . 91 C.3.9 DC reactor arrester (DR) 91 C.3.10 DC filter arrest

43、er (FD) 91 C.4 Overvoltages in the a.c. network due to closely coupled HVDC links 91 C.5 Effect of gas-insulated switchgear on insulation co-ordination of HVDC converter stations 92 BS EN 60071-5:2015IEC 60071-5:2014 IEC 2014 5 Annex D (informative) Typical arrester characteristics 93 Bibliography 9

44、4 Figure 1 Possible arrester locations in a pole with two 12-pulse converters in series . 19 Figure 2 Possible arrester locations for a back-to-back converter station 20 Figure 3 HVDC converter station with one 12-pulse converter bridge per pole . 25 Figure 4 Continuous operating voltages at various

45、 locations (location identification according to Figure 3) . 27 Figure 5 Operating voltage of a valve arrester (V), rectifier operation 29 Figure 6 Operating voltage of a mid-point arrester (M), rectifier operation . 29 Figure 7 Operating voltage of a converter bus arrester (CB), rectifier operation

46、 . 30 Figure 8 One pole of an HVDC converter station . 57 Figure A.1 AC and d.c. arresters 69 Figure A.2 Valve arrester stresses for slow-front overvoltages from a.c. side 69 Figure A.3 Arrester V2 stress for slow-front overvoltage from a.c. side 70 Figure A.4 Valve arrester stresses for earth fault

47、 between valve and upper bridge transformer bushing 70 Figure A.5 Arrester V1 stress for earth fault between valve and upper bridge transformer bushing 71 Figure B.1 AC and d.c. arresters for CCC and CSCC converters . 80 Figure B.2 Valve arrester stresses for slow-front overvoltages from a.c. side 8

48、1 Figure B.3 Arrester V2 stress for slow-front overvoltage from a.c. side 82 Figure B.4 Valve arrester stresses for earth fault between valve and upper bridge transformer bushing 84 Figure B.5 Arrester V1 stress for earth fault between valve and upper bridge transformer bushing 85 Figure B.6 Stresse

49、s on capacitor arresters Cccand Cscduring earth fault between valve and upper bridge transformer bushing 86 Figure C.1 Expanded HVDC converter with parallel valve groups 88 Figure C.2 Upgraded HVDC converter with series valve group 90 Figure D.1 Typical arrester V-I characteristics 93 Table 1 Classes and shapes of overvoltages, standard voltage shapes and standard withstand voltage tests 11 Table 2 Symbol description. 20 Table 3 Comparison of the selection of withstand voltages for a.c.