1、BRITISH STANDARD BS EN 61642:1998 IEC 61642: 1997 Industrial a.c. networks affected by harmonics Application of filters and shunt capacitors The European Standard EN 61642:1997 has the status of a British Standard ICS 31.060.99; 31.160BSEN 61642:1998 This British Standard, having been prepared under
2、 the directionof the Electrotechnical Sector Board, was published underthe authority of the Standards Board and comes intoeffect on 15 January 1998 BSI 04-1999 ISBN 0 580 29473 0 National foreword This British Standard is the English language version of EN61642:1997. It is identical with IEC61642:19
3、97. The UK participation in its preparation was entrusted to Technical Committee PEL/33 Power capacitors, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, a
4、nd keep the UKinterests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number60000 added to the old
5、number. For instance, IEC27-1 has been renumbered as IEC60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include
6、 an annex which lists normative references to international publications with their corresponding European publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards
7、Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard do
8、es not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages 2 to 28 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This
9、 will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSEN 61642:1998 BSI 04-1999 i Contents Page National foreword Inside front cover Foreword 2 Text of EN 61642 5ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61
10、642 October 1997 ICS 31.060.99; 31.160 Descriptors: Capacitors, shunts, power capacities, alternating current, electric filters, definitions, generalities English version Industrial a.c. networks affected by harmonics Applicationof filters and shunt capacitors (IEC 61642:1997) Rseaux industriels cou
11、rant alternatif affects par les harmoniques Emploi de filtres et de condensateurs shunt (CEI 61642:1997) Von Overschwingungen beeinflute industrielle Wechselstromnetze Anwendung von Filtern und Parallelkondensatoren (IEC 61642:1997) This European Standard was approved by CENELEC on 1997-10-01. CENEL
12、EC 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-date lists and bibliographical references concerning such national standards may be obtained on ap
13、plication to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secret
14、ariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC
15、European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1997 CENELEC All rights of exploitation in any form and by any means reserved worldwide fo
16、r CENELEC members. Ref. No. EN 61642:1997 EEN 61642:1997 BSI 04-1999 2 Foreword The text of document 33/255/FDIS, future edition1 of IEC61642, prepared by IECTC33, Power capacitors, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN61642 on 1997-10-01. The following dat
17、es were fixed: Annexes designated “normative” are part of the body of the standard. Annexes designated “informative” are given for information only. In this standard,Annex ZA is normative and Annex A is informative.Annex ZA has been added by CENELEC. Endorsement notice The text of the International
18、Standard IEC61642:1997 was approved by CENELEC as a European Standard without any modification. In the official version, forAnnex A, Bibliography, the following notes have to be added for the standards indicated: IEC 60110, NOTEHarmonized as HD207 S1:1977 (not modified). IEC 60143, NOTEHarmonized in
19、 the EN60143 series. IEC 60358, NOTEHarmonized as HD597S1:1992 (not modified). IEC 60252, NOTEHarmonized as EN60252:1994 (modified). IEC 61048, NOTEHarmonized, together with its corrigendum1992, as EN61048:1993 (modified). IEC 61049, NOTEHarmonized, together with its corrigendum1992, as EN61049:1993
20、 (modified). IEC 60056, NOTEHarmonized, together with its amendments1:1992 and 2:1995, as HD348S6:1995. IEC 60255-6, NOTEHarmonized as EN60255-6:1994 (modified). IEC 60265-1, NOTEHarmonized, together with its amendments 1:1984 and 2:1994, as HD355.1 S3:1995 (not modified). IEC 60265-2, NOTEHarmonize
21、d, together with its corrigendum 1990, as EN60265-2:1993 (not modified). IEC 60269, NOTEHarmonized in the EN60269 series and in the HD630 series. IEC 60282, NOTEHarmonized as EN60282-1:1996 (not modified) and as HD636 S1:1996 (not modified). IEC 60289, NOTEHarmonized as EN60289:1994 (modified). IEC
22、60831-1, NOTEHarmonized as EN60831-1:1996 (not modified). IEC 60871-1, NOTEHarmonized as HD525.1S1:1989 (not modified). IEC 60871-2, NOTEHarmonized as HD525.2S1:1989 (not modified). IEC 60931-1, NOTEHarmonized as EN60931-1:1996 (not modified). IEC 61000-2-2, NOTEHarmonized as ENV61000-2-2:1993 (modi
23、fied). latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1998-07-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 1998-07-01EN 61642:1997 BSI 04-1999 3 Contents
24、 Page 1 General 5 1.1 Scope and object 5 1.2 Normative references 5 1.3 Definitions 5 1.4 General considerations 7 1.4.1 AC harmonics 7 1.4.2 Reactive power 7 2 Resonance problems and solutions 7 2.1 Introduction 7 2.2 Supply impedance view, load-busbar impedance view 8 2.3 Example of series resonan
25、ce 10 2.4 Example of parallel resonance 12 2.5 Solutions to avoid resonances 13 2.5.1 Capacitor-reactor connection: series resonance 14 2.5.2 Capacitor-reactor connection: parallel resonance 16 3 Shunt capacitors and filters for networks having a voltage up to and including 1 000 V 18 3.1 Introducti
26、on 18 3.2 Shunt capacitors 18 3.3 Detuned filter 18 3.4 Tuned filter 19 3.5 Components selection 19 3.5.1 Capacitors 20 3.5.2 Reactors 20 3.5.3 Contactors and/or circuit-breakers 20 3.5.4 Short-circuit protection (fuses) 20 3.6 Disturbance of ripple control installations by shunt capacitors and filt
27、ers 21 3.6.1 Shunt capacitors 21 3.6.2 Detuned filter 21 3.6.3 Tuned filter 22 4 Shunt capacitors and filters for networks having a voltage above 1 000 V 23 4.1 Introduction 23 4.2 Specific requirements 23 4.3 Choice of power factor correction installation 23 4.4 Type of filters 24 4.5 Filter compon
28、ents selection 24 Page 4.5.1 Circuit-breaker 24 4.5.2 Capacitors 25 4.5.3 Reactors 25 4.5.4 Resistors 25 4.5.5 Relay protection 25 4.6 Disturbance of ripple control installations by shunt capacitors and filters 25 Annex A (informative) Bibliography 27 Annex ZA (normative) Normative references to int
29、ernational publications with their corresponding European publication 28 Figure 1 Simplified network and one-line diagram 8 Figure 2a Supply impedance view of a network and one-line diagram 9 Figure 2b Load-busbar impedance view of a network and one-line diagram 9 Figure 3a One-line diagram of a ser
30、ies resonance circuit 10 Figure 3b Impedance in ohms versus harmonic order of the circuit shown in Figure 3a 10 Figure 4a One-line diagram of a parallel resonance circuit 12 Figure 4b Impedance in ohms versus harmonic order of the circuit shown in Figure 4a 12 Figure 5a One-line diagram of a series
31、resonance circuit with capacitor-reactor connection 14 Figure 5b Impedance in ohms versus harmonic order h of the circuit shown in Figure 5a 15 Figure 6a One-line diagram of a parallel resonance circuit with capacitor-reactor connection 16 Figure 6b Impedance in ohms versus harmonic order of the cir
32、cuit shown in Figure 6a 17 Figure 7a One-line diagram of transformer-capacitor arrangement 22 Figure 7b Relative impedance Z RC /Z 1 22 Figure 7c Relative signal voltage U RC /U RCO 23 Figure 8 Types of filters for high-voltage applications 26EN 61642:1997 4 BSI 04-1999 Page Table 1 Numerical result
33、s of impedances, voltages and currents at characteristic harmonic orders of a series resonance circuit in a network with a distorted supply voltage 11 Table 2 Numerical results of impedances, voltages and currents at characteristic harmonic orders of a parallel resonance circuit in the presence of a
34、 harmonic current source. 13 Table 3 Numerical results of impedances, voltages and currents at characteristic harmonic orders of a series resonance circuit with a capacitor-reactor-connection in a network with distorted supply voltage 16 Table 4 Numerical results of impedances, voltages and currents
35、 at characteristic harmonic orders of a parallel resonance circuit with a capacitor-reactor-connection in the presence of a harmonic current source 18EN 61642:1997 BSI 04-1999 5 1 General 1.1 Scope and object This International Standard gives guidance for the use of passive a.c. harmonic filters and
36、 shunt capacitors for the limitation of harmonics and power factor correction intended to be used in industrial applications, at low and high voltages. The measures proposed in this standard are applicable to harmonic orders greater than1 and up to and including25. The following capacitors are exclu
37、ded from this standard: capacitors for inductive heat generating plants, operating at frequencies between40Hz and 24 000 Hz (seeIEC 60110 1 1) ); series capacitors for power systems (seeIEC60143 2); coupling capacitors and capacitor dividers (see IEC60358 3); power electronic capacitors (see IEC6107
38、1 4); AC motor capacitors (see IEC60252 5); capacitors for use in tubular fluorescent and other discharge lamp circuits (seeIEC610486 and IEC61049 7); capacitors for the suppression of radio interference; capacitors intended to be used in various types of electric equipment and thus considered as co
39、mponents; capacitors intended for use with d.c. voltage superimposed on a.c. voltage; capacitors intended for use with arc furnaces. The object of this standard is to identify problems and give recommendations for general applications of capacitors and a.c. harmonic filters in a.c. power systems aff
40、ected by the presence of harmonic voltages and currents. 1.2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All norma
41、tive documents are subjected to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid Interna
42、tional Standards. IEC 60050(131):1978, International Electrotechnical Vocabulary (IEV) Chapter 131: Electric and magnetic circuits. IEC 60050(161):1990, International Electrotechnical Vocabulary (IEV) Chapter 161: Electromagnetic compatibility. 1.3 Definitions For the purpose of this International S
43、tandard, the following definitions apply. 1.3.1 harmonic the component of the Fourier-series decomposition of a voltage or current periodic wave IEV 161-02-18 modified 1.3.2 harmonic order, h the ratio of the frequency of a harmonic (f h ) to the fundamental (rated) network frequency (f 1 ) IEV 161-
44、02-19 modified 1) Figures in square brackets refer to the bibliography given in Annex A.EN 61642:1997 6 BSI 04-1999 1.3.3 characteristic harmonics those harmonics produced by static converters in the course of theoretically ideal operation. The characteristic-harmonic order of static a.c./d.c. conve
45、rters is given by h = mp 1, where p is the pulse number of the converter and m is any integer. For example, the six-pulse converter circuit has characteristic harmonics with order numbers h = 5, 7, 11, 13, 17, 19 1.3.4 non-characteristic harmonics those harmonics which are produced as a result of im
46、balance in the a.c. power system or asymmetrical delay of firing angle of the converter. They are also produced by other non-linear, time-varying devices, for example frequency changers, fluorescent lamps, arc furnaces, electric welding machines, etc. 1.3.5 power factor the ratio of the active power
47、 to the apparent power IEV 131-03-20 1.3.6 displacement factor the ratio of the active power of the fundamental wave to the apparent power of the fundamental wave IEV 131-03-21 modified 1.3.7 distortion factor the ratio of the root-mean-square value of the harmonic content to the root-mean-square va
48、lue of the fundamental quantity, expressed as a percentage of the fundamental IEV 131-03-04 modified 1.3.8 filter an equipment generally constituted of reactors, capacitors and resistors if required, tuned to present a known impedance over a given frequency range 1.3.9 tuning frequency the frequency
49、 for which the filter impedance, calculated from the rated values, has a minimum or maximum value 1.3.10 tuned filter a filter with a tuning frequency which differs by no more than10% from the frequency which is to be filtered 1.3.11 detuned filter a filter with a tuning frequency more than10% below the lowest harmonic frequency with considerable current/voltage amplitude 1.3.12 damped filter a filter with low, predominantly resistive, impedance over a wide band of
