CISPR TR 18-3:2017
(Main)Radio interference characteristics of overhead power lines and high-voltage equipment - Part 3: Code of practice for minimizing the generation of radio noise
Radio interference characteristics of overhead power lines and high-voltage equipment - Part 3: Code of practice for minimizing the generation of radio noise
CISPR TR 18-3:2017 which is a technical report, applies to radio noise from overhead power lines and high-voltage equipment which may cause interference to radio reception, excluding the fields from power line carrier signals. The frequency range covered is 0,15 MHz to 3 GHz. This third edition cancels and replaces the second edition published in 2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- localisation system of spark discharges which might contain frequency components up to 3 GHz;
- information regarding equations for predetermination of the radio noise level from HVDC overhead power lines.
Keywords: radio noise from overhead power lines and high-voltage equipment
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CISPR TR 18-3 ®
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 3: Code of practice for minimizing the generation of radio noise
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
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CISPR TR 18-3 ®
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 3: Code of practice for minimizing the generation of radio noise
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.100.01 ISBN 978-2-8322-4893-5
– 2 – CISPR TR 18-3:2017 IEC 2017
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Practical design of overhead power lines and associated equipment in order to
control interference to radio broadcast sound and television reception . 8
4.1 Overview. 8
4.2 Corona on conductors . 8
4.3 Corona on metal hardware . 8
4.4 Surface discharges on insulators . 9
4.4.1 Clean or slightly polluted insulators . 9
4.4.2 Very polluted insulators . 9
4.5 Spark and microsparks due to bad contacts, commutation effects . 10
4.6 Defects on power lines and associated equipment in service . 10
5 Methods of prediction of the reference level of an overhead line . 10
5.1 General . 10
5.2 Correlation of data given elsewhere in this publication . 11
5.3 CIGRÉ formula. 12
5.4 Determination of 80 % level . 12
5.5 Conclusions . 13
6 Preventive and remedial measures to minimize radio noise generated by bad
contacts and their detection and location . 13
6.1 General . 13
6.2 Preventive and remedial measures . 13
6.3 Methods of detecting and locating bad contacts . 15
7 Formulae for predetermination of the radio noise field strength produced by large
conductor bundles (more than four sub-conductors) and by tubular conductors . 17
7.1 Basic principles . 17
7.2 Calculation of corona radio noise field strengths due to large bundles . 18
7.2.1 Procedure for the predetermination of the radio noise field strength . 18
7.2.2 Calculation of the excitation function in heavy rain . 19
7.2.3 Correction factor to evaluate the excitation function in other weather
categories . 19
7.2.4 Calculation of the radio noise field strength . 19
7.3 Evaluation of corona radio noise field strength due to large tubular
conductors . 20
8 Figures . 22
Annex A (informative) Formulae for predicting the radio noise field strength from the
conductors of an overhead line . 30
A.1 CIGRÉ formula for general use . 30
A.2 Collation of predetermination formulae used by several institutions around
the world . 31
Annex B (informative) Configuration of an RF-based spark discharge detector and
Direction Of Arrival (DOA) estimation method . 42
B.1 Configuration of RF-based spark discharge detector . 42
B.2 Direction of Arrival (DOA) estimation method based on Time Difference of
Arrival (TDOA) [17] . 42
Annex C (informative) Analytical procedure for the predetermination of the radio
noise field strength, at a given distance from an overhead line with large bundle
conductors . 44
C.1 Analytical procedure . 44
C.2 Example of calculation of the radio noise field strength . 45
Bibliography . 51
Figure 1 – Bundle conductors . 22
Figure 2 – Line with conductors in a flat configuration . 23
Figure 3 – Line with conductors in a delta configuration . 24
Figure 4 – Line with conductors in a triangular configuration . 25
Figure 5 – Line with conductors in a flat configuration . 26
Figure 6 – Line with conductors in a delta configuration . 27
Figure 7 – Line with conductors in a triangular configuration . 28
Figure 8 – Tubular conductors of 40 cm diameter. 29
Figure B.1 – Configuration of RF-based spark discharge detector [17] . 42
Figure B.2 – Coordinates and arrangement of the four-antenna-square array. 43
Figure C.1 – Designation of the geometrical quantities for the simplified analytical
method . 49
Figure C.2 – Lateral profiles of the radio noise field strengths produced by the
individual phases and of the total field, as calculated in the given example . 50
Table A.1 – Empirical methods, terms of the predetermination formulae developed by
several institutions, survey . 32
Table A.2 – Empirical methods, complete predetermination formulae developed by
several institutions, survey . 34
Table A.3 – Predetermination formulae, examples for calculation of the absolute field
strength levels . 36
Table A.4 – Empirical methods, complete predetermination formulae for DC lines
developed by several institutions, survey . 38
Table A.5 – Formulae for calculation of the excitation function in fair weather for DC
lines developed by several institutions, survey . 40
– 4 – CISPR TR 18-3:2017 IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
____________
RADIO INTERFERENCE CHARACTERISTICS
OF OVERHEAD POWER LINES
AND HIGH-VOLTAGE EQUIPMENT –
Part 3: Code of practice for minimizing
the generation of radio noise
FOREWORD
1) The International Electrotechnical Commission (IEC) is 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 other 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 the 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 conditions 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 National 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 in 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 Publication and the correspond
...
CISPR TR 18-3 ®
Edition 3.0 2017-10
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
Radio interference characteristics of overhead power lines and high-voltage
equipment –
Part 3: Code of practice for minimizing the generation of radio noise
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 corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform Electropedia - www.electropedia.org
The advanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology,
variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English
committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.
and withdrawn publications. Also known as the International Electrotechnical Vocabulary
(IEV) online.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Glossary - std.iec.ch/glossary
details all new publications released. Available online and 67 000 electrotechnical terminology entries in English and
once a month by email. French extracted from the Terms and Definitions clause of
IEC publications issued since 2002. Some entries have been
IEC Customer Service Centre - webstore.iec.ch/csc collected from earlier publications of IEC TC 37, 77, 86 and
If you wish to give us your feedback on this publication or CISPR.
need further assistance, please contact the Customer Service
Centre: sales@iec.ch.
CISPR TR 18-3 ®
Edition 3.0 2017-10
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
Radio interference characteristics of overhead power lines and high-voltage
equipment –
Part 3: Code of practice for minimizing the generation of radio noise
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.100.01 ISBN 978-2-8322-5000-6
– 2 – CISPR TR 18-3:2017 RLV IEC 2017
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 Practical design of overhead power lines and associated equipment in order to
control interference to radio broadcast sound and television reception . 9
4.1 Overview. 9
4.2 Corona on conductors . 9
4.3 Corona on metal hardware . 9
4.4 Surface discharges on insulators . 10
4.4.1 Clean or slightly polluted insulators . 10
4.4.2 Very polluted insulators . 10
4.5 Spark and microsparks due to bad contacts, commutation effects . 11
4.6 Defects on power lines and associated equipment in service . 11
5 Methods of prediction of the reference level of an overhead line . 11
5.1 General . 11
5.2 Correlation of data given elsewhere in this publication . 12
5.3 CIGRÉ formula. 13
5.4 Determination of 80 % level . 13
5.5 Conclusions . 14
6 Preventive and remedial measures to minimize radio noise generated by bad
contacts and their detection and location . 14
6.1 General . 14
6.2 Preventive and remedial measures . 14
6.3 Methods of detecting and locating bad contacts . 16
7 Formulae for predetermination of the radio noise field strength produced by large
conductor bundles (more than four sub-conductors) and by tubular conductors . 18
7.1 Basic principles . 18
7.2 Calculation of corona radio noise field strengths due to large bundles . 19
7.2.1 Procedure for the predetermination of the radio noise field strength . 19
7.2.2 Calculation of the excitation function in heavy rain . 20
7.2.3 Correction factor to evaluate the excitation function in other weather
categories . 20
7.2.4 Calculation of the radio noise field strength . 20
7.3 Evaluation of corona radio noise field strength due to large tubular
conductors . 21
8 Figures . 23
Bibliography . 52
Annex A (informative) Formulae for predicting the radio noise field strength from the
conductors of an overhead line . 31
A.1 CIGRÉ formula for general use . 31
A.2 Collation of predetermination formulae used by several institutions around
the world . 32
Annex B (informative) Configuration of an RF-based spark discharge detector and
Direction Of Arrival (DOA) estimation method . 43
B.2 Direction of Arrival (DOA) estimation method based on Time Difference of
Arrival (TDOA) [17] . 43
B.1 Configuration of RF-based spark discharge detector . 43
Annex C (informative) Analytical procedure for the predetermination of the radio
noise field strength, at a given distance from an overhead line with large bundle
conductors . 45
C.1 Analytical procedure . 45
C.2 Example of calculation of the radio noise field strength . 46
Figure 1 – Bundle conductors . 23
Figure 2 – Line with conductors in a flat configuration . 24
Figure 3 – Line with conductors in a delta configuration . 25
Figure 4 – Line with conductors in a triangular configuration . 26
Figure 5 – Line with conductors in a flat configuration . 27
Figure 6 – Line with conductors in a delta configuration . 28
Figure 7 – Line with conductors in a triangular configuration . 29
Figure 8 – Tubular conductors of 40 cm diameter. 30
Figure B.1 – Configuration of RF-based spark discharge detector [17] . 43
Figure B.2 – Coordinates and arrangement of the four-antenna-square array. 44
Figure C.1 – Designation of the geometrical quantities for the simplified analytical
method . 50
Figure C.2 – Lateral profiles of the radio noise field strengths produced by the
individual phases and of the total field, as calculated in the given example . 51
Table A.1 – Empirical methods, terms of the predetermination formulae developed by
several institutions, survey . 33
Table A.2 – Empirical methods, complete predetermination formulae developed by
several institutions, survey (1 of 2) . 35
Table A.3 – Predetermination formulae, examples for calculation of the absolute field
strength levels (1 of 2) . 37
Table A.4 – Empirical methods, complete predetermination formulae for DC lines
developed by several institutions, survey (1 of 2) . 39
Table A.5 – Formulae for calculation of the excitation function in fair weather for DC
lines developed by several institutions, survey . 41
– 4 – CISPR TR 18-3:2017 RLV IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
____________
RADIO INTERFERENCE CHARACTERISTICS
OF OVERHEAD POWER LINES
AND HIGH-VOLTAGE EQUIPMENT –
Part 3: Code of practice for minimizing
the generation of radio noise
FOREWORD
1) The International Electrotechnical Commission (IEC) is 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 other 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 the 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 conditions 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 National 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 in 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 Publication 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. I
...
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