CLC TR 62271-208-2010 High-voltage switchgear and controlgear - Part 208 Methods to quantify the steady state power-frequency electromagnetic fields generated by HV switchgear asse.pdf

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1、High-voltage switchgear and controlgearPart 208: Methods to quantify the steady state, power-frequency electromagnetic fields generated by HV switchgear assemblies and HV/LV prefabricated substationsPD CLC/TR 62271-208:2010National forewordThis Published Document is the UK implementation of CLC/TR 6

2、2271-208:2010. It is identical to IEC/TR 62271-208:2009.The UK participation in its preparation was entrusted by Technical CommitteePEL/17, Switchgear, controlgear, and HV-LV co-ordination, to SubcommitteePEL/17/1, High-voltage switchgear and controlgear.A list of organizations represented on this c

3、ommittee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application. BSI 2010 ISBN 978 0 580 58958 4 ICS 29.130.10Compliance with a British Standard cannot confer immunity from l

4、egal obligations.This Published Document was published under the authority of the Standards Policy and Strategy Committee on 31 July 2010.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDPD CLC/TR 62271-208:2010TECHNICAL REPORT CLC/TR 62271-208 RAPPORT TECHNIQUE TECHNISC

5、HER BERICHT April 2010 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2010 CENELEC - All rights of exploitation in any form and by

6、any means reserved worldwide for CENELEC members. Ref. No. CLC/TR 62271-208:2010 E ICS 29.130.10 English version High-voltage switchgear and controlgear - Part 208: Methods to quantify the steady state, power-frequency electromagnetic fields generated by HV switchgear assemblies and HV/LV prefabrica

7、ted substations (IEC/TR 62271-208:2009) Appareillage haute tension - Partie 208: Mthodes de quantification des champs lectromagntiques frquence industrielle en rgime tabli gnrs par les ensembles dappareillages HT et les postes prfabriqus HT/BT (CEI/TR 62271-208:2009) Hochspannungs-Schaltgerte und -S

8、chaltanlagen - Teil 208: Bestimmung der stationren, betriebsfrequenten elektromagnetischen Felder von HS-Schaltanlagen und fabrikfertigen HS-/NS-Stationen (IEC/TR 62271-208:2009) This Technical Report was approved by CENELEC on 2010-03-05. CENELEC members are the national electrotechnical committees

9、 of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, 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

10、United Kingdom. PD CLC/TR 62271-208:2010CLC/TR 62271-208:2010 2 Foreword This Technical Report consists of the text of the International Technical Report IEC/TR 62271-208:2009 prepared by SC 17C, High-voltage switchgear and controlgear assemblies, of IEC TC 17, Switchgear and controlgear. It was cir

11、culated for voting in accordance with the Internal Regulations, Part 2, Subclause 11.4.3.3 (simple majority) for acceptance as a CENELEC Technical Report. _ PD CLC/TR 62271-208:2010 3 CLC/TR 62271-208:2010 Annex ZA (normative) Normative references to international publications with their correspondi

12、ng European publications The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE Where an Internatio

13、nal Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 61000-6-2 - 1)Electromagnetic compatibility (EMC) Part 6-2: Generic standards Immunity for industrial environments EN 61000-6-2 - 2)IEC 61786 - 1)Measureme

14、nt of low-frequency magnetic and electric fields with regard to exposure of human beings Special requirements for instruments and guidance for measurement - - IEC 62271-200 - 1)High-voltage switchgear and controlgear Part 200: AC metal-enclosed switchgear and controlgear for rated voltages above 1 k

15、V and up to and including 52 kV EN 62271-200 - 2)IEC 62271-201 - 1)High-voltage switchgear and controlgear Part 201: AC insulation-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV EN 62271-201 - 2)IEC 62271-202 - 1)High-voltage switchgear and controlgea

16、r Part 202: High voltage/low voltage prefabricated substation EN 62271-202 - 2)1)Undated reference. 2)Valid edition at date of issue. PD CLC/TR 62271-208:2010 2 TR 62271-208 IEC:2009 CONTENTS INTRODUCTION.6 1 Scope.7 2 Normative references .7 3 Terms and definitions .8 4 Evaluation requirements .9 4

17、.1 General .9 4.2 Methods of evaluation .9 4.3 Evaluation of electric fields10 4.3.1 HV switchgear assemblies.10 4.3.2 HV/LV prefabricated substations10 4.4 Evaluation of magnetic fields.10 4.4.1 HV switchgear assemblies.10 4.4.2 HV/LV prefabricated substations11 5 Measurements12 5.1 General .12 5.2

18、 Measuring instruments 12 5.3 Measurement procedures 12 5.3.1 General .12 5.3.2 Electric field 13 5.3.3 Magnetic field 16 5.3.4 Background fields16 5.3.5 Environmental factors16 5.4 Measurement set-up17 5.4.1 General .17 5.4.2 Additional provisions for HV/LV prefabricated substations .20 6 Calculati

19、ons .20 6.1 General .20 6.2 Software21 6.3 Calculation procedures21 6.4 Results21 6.5 Validation 22 7 Documentation .22 7.1 Characteristics of the HV switchgear assembly or prefabricated substation .22 7.2 Evaluation method.22 7.3 Presentation of the measurement results.22 7.4 Presentation of the ca

20、lculation results .23 Annex A (informative) Presentation of E or B field measurement data Example for a typical HV/LV pre-fabricated substation 24 Annex B (informative) Examples of analytical solutions to benchmark EMF calculations.27 Bibliography45 Figure 1 Example of test circuits configuration to

21、 obtain the maximum external magnetic field of a switchgear assembly and/or a prefabricated substation .11 Figure 2 Reference surface (RS) for equipment of irregular shape .13 PD CLC/TR 62271-208:2010TR 62271-208 IEC:2009 3 Figure 3 Scanning areas to find the hot spots 14 Figure 4 Determination of t

22、he field variation as a function of the distance from the hot spot locations (perpendicular to the reference surface) .15 Figure 5 Test set-up of main components, external cables, hot spot locations and measurement volume18 Figure 6 Test circuit for electric and magnetic field measurement 19 Figure

23、A.1 Hot spot locations representing the field maxima 24 Figure A.2 Graphical presentation of the field variation 25 Figure A.3 Example diagram for the field variation at hot spots 26 Figure B.1 Schematic for 3-phase magnetic field calculation27 Figure B.2 Variation of resultant magnetic field around

24、 3-phase cable .30 Figure B.3 Maximum resultant magnetic field around 3-phase cable 31 Figure B.4 Schematic for 3-phase electric field calculation.35 Figure B.5 Variation of resultant electric field around 3-phase cable 38 Figure B.6 Maximum resultant electric field around 3-phase cable .40 Table A.

25、1 Listing of the hot spot coordinates25 Table A.2 Variation of field values for one hot spot 25 Table A.3 Background fields 26 Table B.1 Values of Hresfor spatial angles and time angles t .30 Table B.2 Values of maximum Hresfor spatial angles 32 Table B.3 Values of Eresfor spatial angles and time an

26、gles t39 Table B.4 Values of maximum E for spatial angles 40 PD CLC/TR 62271-208:2010 6 TR 62271-208 IEC:2009 INTRODUCTION Manufacturers of electricity supply equipment may be asked to provide information about the electromagnetic field characteristics to enable the user to assess the electromagneti

27、c field conditions to assist with planning, installation, operating instructions and service, take measures to meet requirements or regulations on electromagnetic fields, compare different products as far as their level of electromagnetic fields is concerned. The purpose of this technical report is

28、to describe a methodology for the evaluation (measurement or calculation) of generated electromagnetic fields. The electromagnetic field characteristic of the equipment comprises the values of the electric and the magnetic fields around its accessible surfaces. The electromagnetic field characterist

29、ic defined in this technical report refers to a single product as defined in the scope. In real installations, several field sources can superimpose, so the resulting electromagnetic fields on site may differ significantly from the single product characteristics. This technical report does not defin

30、e a mandatory test for the products mentioned in the scope. Neither the establishment of limits for the electromagnetic fields generated by equipment, nor the establishment of assessment methods for the human exposure to electromagnetic fields is within the content or intent of this technical report

31、. PD CLC/TR 62271-208:2010TR 62271-208 IEC:2009 7 HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR Part 208: Methods to quantify the steady state, power-frequency electromagnetic fields generated by HV switchgear assemblies and HV/LV prefabricated substations 1 Scope This part of IEC 62271 gives practical gu

32、idance for the evaluation and documentation of the external electromagnetic fields which are generated by HV switchgear assemblies and HV/LV prefabricated substations. Basic requirements to measure or calculate the electric and magnetic fields are summarised for switchgear assemblies covered by IEC

33、62271-200 and IEC 62271-201, and for prefabricated substations covered by IEC 62271-202. NOTE 1 The methods described in this technical report refer to three-phase equipment. However, the methodology may be used correspondingly for any single- or multi-phase equipment covered by this technical repor

34、t. This technical report applies to equipment rated for voltages up to and including 52 kV and power-frequencies from 15 Hz to 60 Hz. The electromagnetic fields which are generated by harmonics or transients are not considered in this technical report. However, the methods described are equally appl

35、icable to the harmonic fields of the power-frequency. Detailed generic information on requirements and measurements of low-frequency electromagnetic fields is given in IEC 61786. This technical report covers evaluation under factory or laboratory conditions before installation. The electric and the

36、magnetic fields can be evaluated either by measurements or by calculations. NOTE 2 Where practicable, the methods described in this technical report may also be used for installations on site. It is not within the scope of this technical report to specify limit values of electromagnetic fields or me

37、thods for the assessment of human exposure. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any ame

38、ndments) applies. IEC 61000-6-2, Electromagnetic compatibility (EMC) Part 6-2: Generic standards - Immunity for industrial environments IEC 61786, Measurement of low-frequency magnetic and electric fields with regard to exposure of human beings Special requirements for instruments and guidance for m

39、easurements IEC 62271-200, High-voltage switchgear and controlgear Part 200: AC metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV PD CLC/TR 62271-208:2010 8 TR 62271-208 IEC:2009 IEC 62271-201, High-voltage switchgear and controlgear Part 201: AC i

40、nsulation-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV IEC 62271-202, High-voltage switchgear and controlgear Part 202: High-voltage/low-voltage prefabricated substation 3 Terms and definitions For the purposes of this document, the following terms

41、and definitions apply. 3.1 EMF abbreviation for the term “electromagnetic field(s)” 3.2 electric field characteristic values (r.m.s.) and spatial distribution of the electric field strength at rated voltage and frequency around all accessible surfaces of the equipment. The electric field characteris

42、tic is the resultant of the r.m.s. values of the three orthogonal vector components 3.3 magnetic field characteristic values (r.m.s.) and spatial distribution of the magnetic flux density at rated normal current and frequency around all accessible surfaces of the equipment. The magnetic field charac

43、teristic is the resultant of the r.m.s. values of the three orthogonal vector components NOTE The terms “resultant electric field” and “resultant magnetic field” are defined in IEC 61786. 3.4 accessible surfaces those parts of the walls and roof of prefabricated substations or HV switchgear assembli

44、es that can be touched with all covers and doors in closed position in normal service conditions 3.5 reference surface RS virtual envelope containing the equipment for evaluation purposes 3.6 measurement surface MS defined outside the reference surface at 20 cm distance NOTE This surface is used for

45、 measuring the hot spots and the variation of the EMF. 3.7 hot spot centre of an area of a local maximum of the electric or the magnetic field 3.8 EMF characteristic spatial distribution of the resultant (modulus) of the r.m.s. electric field strength (E) and the magnetic flux density (B). The spati

46、al distribution is derived from a measurement or calculation grid PD CLC/TR 62271-208:2010TR 62271-208 IEC:2009 9 3.9 measurement volume MV virtual space in which the electromagnetic background field must not exceed an appropriate level to permit the uninfluenced measurement of the electric and magn

47、etic fields generated by the equipment 4 Evaluation requirements 4.1 General The EMF characteristic of HV switchgear assemblies or HV/LV prefabricated substations is the measured or calculated electric field strength and magnetic flux density around all accessible surfaces under the conditions for e

48、valuation described below. These conditions represent the service, where the loading of the switchgear assemblies and, in a substation, of the transformer is at defined values. As the electric and magnetic fields are dependent on the physical arrangement of incoming and outgoing cables and their loa

49、dings, these parameters have to be recorded. The presence of other field sources and shielding or other metallic structures shall be recorded. The EMF characteristic shall be evaluated for the conditions that would result in the highest levels of electric and magnetic fields in normal, undisturbed service. These conditions include the highest currents and largest loops realistically possible through the assembly working