CISPR TR 18-2:2017
(Main)Radio interference characteristics of overhead power lines and high-voltage equipment - Part 2: Methods of measurement and procedure for determining limits
Radio interference characteristics of overhead power lines and high-voltage equipment - Part 2: Methods of measurement and procedure for determining limits
CISPR TR 18-2:2017 which is a Technical Report, applies to radio noise from overhead power lines and high-voltage equipment which may cause interference to radio reception. The frequency range covered by this publication is 0,15 MHz to 3 GHz. A general procedure for establishing the limits of the radio noise field from the power lines and equipment is recommended, together with typical values as examples, and methods of measurement. The clause on limits concentrates on the low frequency and medium frequency bands and it is only in these bands where ample evidence, based on established practice, is available. No examples of limits to protect radio reception in the frequency band 30 MHz to 3 GHz have been given, as measuring methods and certain other aspects of the problems in this band have not yet been fully resolved. Site measurements and service experience have shown that levels of noise from power lines at frequencies higher than 300 MHz in normal operation are so low that interference is unlikely to be caused to television reception. The values of limits given as examples are calculated to provide a reasonable degree of protection to the reception of broadcasting at the boundary of the recognized service areas of the appropriate transmitters in the radio frequency bands used for a.m. radio broadcasting, in the least favourable conditions likely to be generally encountered. These limits are intended to provide guidance at the planning stage of the line and national standards or other specifications against which the performance of the line may be checked after construction and during its useful life. The measuring apparatus and methods used for checking compliance with limits should comply with the respective CISPR specifications, as e.g. the basic standards series CISPR 16, see [1]. This third edition of CISPR TR 18-2 is adapted to the modern structure and content of technical reports issued by IEC. The second edition of CISPR TR 18-2 underwent thorough edition and adaptation to modern terminology. This third edition now also covers an adequate method of measurement for radiated disturbances from HV overhead power lines and substations in the range 300 MHz to 3 GHz, since gap-type discharges can be a potential noise source disturbing modern digital radio communication.
Keywords: radio noise from overhead power lines and high-voltage equipment
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CISPR TR 18-2 ®
Edition 3.0 2017-10
TECHNICAL
REPORT
colour
inside
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
Radio interference characteristics of overhead power lines and high-voltage
equipment –
Part 2: Methods of measurement and procedure for determining limits
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
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variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and
CISPR.
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CISPR TR 18-2 ®
Edition 3.0 2017-10
TECHNICAL
REPORT
colour
inside
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
Radio interference characteristics of overhead power lines and high-voltage
equipment –
Part 2: Methods of measurement and procedure for determining limits
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.100.01 ISBN 978-2-8322-4894-2
– 2 – CISPR TR 18-2:2017 IEC 2017
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 11
4 Measurements . 11
4.1 Measuring instruments . 11
4.1.1 Response of a standard quasi-peak CISPR measuring receiver to AC
generated corona noise . 11
4.1.2 Other measuring instruments . 12
4.2 On-site measurements on HV overhead power lines . 12
4.2.1 General . 12
4.2.2 Measurements in the frequency range 0,15 MHz to 30 MHz . 12
4.2.3 Measurements in the frequency range from 30 MHz to 300 MHz . 14
4.2.4 Measurements in the frequency range from 300 MHz to 3 GHz . 15
4.3 Statistical evaluation of the radio noise level of a line . 15
4.4 Additional information to be given in the report . 17
4.5 Measurements on HV equipment in the laboratory . 17
4.5.1 Overview . 17
4.5.2 State of the test object . 17
4.5.3 Test area . 18
4.5.4 Atmospheric conditions . 18
4.5.5 Test circuit – Basic diagram . 18
4.5.6 Practical arrangement of the test circuit . 19
4.5.7 Test circuit components . 19
4.5.8 Measuring receiver connections . 20
4.5.9 Mounting and arrangement of test object . 21
4.5.10 Measurement frequency . 21
4.5.11 Checking of the test circuit . 21
4.5.12 Calibration of the test circuit . 22
4.5.13 Test procedure . 23
4.5.14 Related observations during the test . 24
4.5.15 Data to be given in test report . 24
5 Methods for derivation of limits for HV power systems . 24
5.1 Overview. 24
5.2 Significance of CISPR limits for power lines . 25
5.3 Technical considerations for derivation of limits for lines . 26
5.3.1 Basic approach . 26
5.3.2 General . 26
5.3.3 Minimum broadcast signal levels to be protected . 27
5.3.4 Required signal-to-noise ratio . 28
5.3.5 Use of data on radio noise compiled during measurements in the field . 29
5.3.6 Use of data obtained by prediction of the radio noise from high-voltage
overhead power lines . 30
5.4 Methods of determining compliance of measured data with limits . 31
5.4.1 Long-term recording . 31
5.4.2 Sampling method . 31
5.4.3 Survey methods . 32
5.4.4 Alternative criteria for an acceptable noise level . 32
5.5 Examples for derivation of limits in the frequency range below 30 MHz . 33
5.5.1 Radio reception . 33
5.5.2 Television reception, 47 MHz to 230 MHz . 35
5.5.3 Digital terrestrial television reception, 470 MHz to 950 MHz . 35
5.6 Additional remarks . 35
5.7 Technical considerations for derivation of limits for line equipment and
HVAC substations . 35
5.7.1 General . 35
5.7.2 Current injected by line components and hardware . 36
5.7.3 Current injected by substation equipment . 36
5.7.4 Practical derivation of limits in the l.f. and m.f. band . 37
6 Methods for derivation of limits for the radio noise produced by insulator sets . 38
6.1 General considerations . 38
6.2 Insulator types . 39
6.3 Influence of insulator surface conditions . 39
6.3.1 General . 39
6.3.2 Clean insulators . 40
6.3.3 Slightly polluted insulators . 40
6.3.4 Polluted insulators . 40
6.4 Criteria for setting up radio noise limits for insulators . 41
6.4.1 General . 41
6.4.2 Criterion for insulators to be installed in type A areas . 41
6.4.3 Criterion for insulators to be installed in type B areas . 41
6.4.4 Criterion for insulators to be installed in type C areas . 42
6.5 Recommendations . 42
7 Methods for derivation of limits for the radio noise due to HVDC converter stations
and similar installations . 44
7.1 General considerations . 44
7.2 Sources of interference . 44
7.2.1 Mechanism of radio noise generation . 44
7.2.2 Influence of station design on radio interference . 46
7.3 Radiated fields from valve halls . 46
7.3.1 Frequency spectra . 46
7.3.2 Lateral attenuation . 46
7.3.3 Reduction of the radio interference due to direct radiation from the
valve hall . 46
7.4 Conducted interference along the transmission lines . 47
7.4.1 Description of the mechanism and typical longitudinal profiles . 47
7.4.2 Reduction of the interference conducted along the transmission lines . 48
7.5 General criteria for stating limits . 48
7.5.1 Overview . 48
7.5.2 Direct radiation . 48
7.5.3 Propagation along the lines . 48
8 Figures . 50
Annex A (informative) Radio interference measuring apparatus differing from the
CISPR basic standard instruments . 64
– 4 – CISPR TR 18-2:2017 IEC 2017
Annex B (normative) List of additional information to be included in the report on the
results of measurements on operational lines .
...
CISPR TR 18-2 ®
Edition 3.0 2017-10
REDLINE VERSION
TECHNICAL
REPORT
colour
inside
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
Radio interference characteristics of overhead power lines and high-voltage
equipment –
Part 2: Methods of measurement and procedure for determining limits
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 21 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.
IEC publications search - webstore.iec.ch/advsearchform IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 67 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and
CISPR.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: sales@iec.ch.
CISPR TR 18-2 ®
Edition 3.0 2017-10
REDLINE VERSION
TECHNICAL
REPORT
colour
inside
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
Radio interference characteristics of overhead power lines and high-voltage
equipment –
Part 2: Methods of measurement and procedure for determining limits
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.100.01 ISBN 978-2-8322-4999-4
– 2 – CISPR TR 18-2:2017 RLV IEC 2017
CONTENTS
FOREWORD . 6
INTRODUCTION . 2
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 11
4 Measurements . 11
4.1 Measuring instruments . 11
4.1.1 Response of a standard quasi-peak CISPR measuring receiver to AC
generated corona noise . 11
4.1.2 Other measuring instruments . 12
4.2 On-site measurements on HV overhead power lines . 12
4.2.1 General . 12
4.2.2 Measurements in the frequency range 0,15 MHz to 30 MHz . 12
4.2.3 Measurements in the frequency range from 30 MHz to 300 MHz . 14
4.2.4 Measurements in the frequency range from 300 MHz to 3 GHz . 15
4.3 Statistical evaluation of the radio noise level of a line . 16
4.4 Additional information to be given in the report . 17
4.5 Measurements on HV equipment in the laboratory . 17
4.5.1 Overview . 17
4.5.2 State of the test object . 18
4.5.3 Test area . 18
4.5.4 Atmospheric conditions . 18
4.5.5 Test circuit – Basic diagram . 19
4.5.6 Practical arrangement of the test circuit . 19
4.5.7 Test circuit components . 20
4.5.8 Measuring receiver connections . 20
4.5.9 Mounting and arrangement of test object . 21
4.5.10 Measurement frequency . 22
4.5.11 Checking of the test circuit . 22
4.5.12 Calibration of the test circuit . 22
4.5.13 Test procedure . 23
4.5.14 Related observations during the test . 24
4.5.15 Data to be given in test report . 24
5 Methods for derivation of limits for HV power systems . 25
5.1 Overview. 25
5.2 Significance of CISPR limits for power lines . 25
5.3 Technical considerations for derivation of limits for lines . 26
5.3.1 Basic approach . 26
5.3.2 Scope General . 26
5.3.3 Minimum broadcast signal levels to be protected . 27
5.3.4 Required signal-to-noise ratio . 28
5.3.5 Use of data on radio noise compiled during measurements in the field . 29
5.3.6 Use of data obtained by prediction of the radio noise from high-voltage
overhead power lines . 30
5.4 Methods of determining compliance of measured data with limits . 32
5.4.1 Long-term recording . 32
5.4.2 Sampling method . 32
5.4.3 Survey methods . 32
5.4.4 Alternative criteria for an acceptable noise level . 33
5.5 Examples for derivation of limits in the frequency range below 30 MHz . 33
5.5.1 Radio reception . 33
5.5.2 Television reception, 47 MHz to 230 MHz . 35
5.5.3 Digital terrestrial television reception, 470 MHz to 950 MHz . 35
5.6 Additional remarks . 35
5.7 Technical considerations for derivation of limits for line equipment and
HVAC substations . 36
5.7.1 General . 36
5.7.2 Current injected by line components and hardware . 36
5.7.3 Current injected by substation equipment . 37
5.7.4 Practical derivation of limits in the l.f. and m.f. band . 37
6 Methods for derivation of limits for the radio noise produced by insulator sets . 39
6.1 General considerations . 39
6.2 Insulator types . 39
6.3 Influence of insulator surface conditions . 40
6.3.1 General . 40
6.3.2 Clean insulators . 40
6.3.3 Slightly polluted insulators . 40
6.3.4 Polluted insulators . 41
6.4 Criteria for setting up radio noise limits for insulators . 41
6.4.1 General . 41
6.4.2 Criterion for insulators to be installed in type A areas . 42
6.4.3 Criterion for insulators to be installed in type B areas . 42
6.4.4 Criterion for insulators to be installed in type C areas . 42
6.5 Recommendations . 42
7 Methods for derivation of limits for the radio noise due to HVDC converter stations
and similar installations . 44
7.1 General considerations . 44
7.2 Sources of interference . 45
7.2.1 Mechanism of radio noise generation . 45
7.2.2 Influence of station design on radio interference . 46
7.3 Radiated fields from valve halls . 47
7.3.1 Frequency spectra . 47
7.3.2 Lateral attenuation . 47
7.3.3 Reduction of the radio interference due to direct radiation from the
valve hall . 47
7.4 Conducted interference along the transmission lines . 47
7.4.1 Description of the mechanism and typical longitudinal profiles . 47
7.4.2 Reduction of the interference conducted along the transmission lines . 48
7.5 General criteria for stating limits . 48
7.5.1 Overview . 48
7.5.2 Direct radiation . 49
7.5.3 Propagation along the lines . 49
8 Figures . 50
Annex A (informative) Radio interference measuring apparatus differing from the
CISPR basic standard instruments . 64
– 4 – CISPR TR 18-2:2017 RLV IEC 2017
Annex B (normative) List of additional information to be included in the report on the
results of measurements on operational lines .
...
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