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BSI PD CISPR/TR 18-1:2017 – TC:2020 Edition

BSI PD CISPR/TR 18-1:2017 – TC:2020 Edition

$280.87

Tracked Changes. Radio interference characteristics of overhead power lines and high-voltage equipment – Description of phenomena

Published By Publication Date Number of Pages
BSI 2020 191
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CISPR TR 18-1:2017 is available as /2 which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition. CISPR TR 18-1:2017 which is a Technical Report, applies to radio noise from overhead power lines, associated equipment, and high-voltage equipment which may cause interference to radio reception. The scope of this document includes the causes, measurement and effects of radio interference, design aspects in relation to this interference, methods and examples for establishing limits and prediction of tolerable levels of interference from high voltage overhead power lines and associated equipment, to the reception of radio signals and services. The frequency range covered is 0,15 MHz to 3 GHz. Radio frequency interference caused by the pantograph of overhead railway traction systems is not considered in this document. 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: – updated description of the RF characteristics of spark discharges which might contain spectral radio noise components up to the GHz frequency range; – addition of state of the art in HVDC converter technology Keywords: radio noise from overhead power lines and high-voltage equipment

PDF Catalog

PDF Pages PDF Title
1 compares PD CISPR/TR 18-1:2017
2 TRACKED CHANGES
Text example 1 — indicates added text (in green)
109 National foreword
111 CONTENTS
114 FOREWORD
116 INTRODUCTION
118 1 Scope
2 Normative references
3 Terms and definitions
119 4 Radio noise from HV AC overhead power lines
4.1 General
120 4.2 Physical aspects of radio noise
4.2.1 Mechanism of formation of a noise field
122 4.2.2 Definition of noise
123 4.2.3 Influence of external parameters
4.3 Main characteristics of the noise field resulting from conductor corona
4.3.1 General
4.3.2 Frequency spectrum
124 4.3.3 Lateral profile
126 4.3.4 Statistical distribution with varying seasons and weather conditions
127 5 Effects of corona from conductors
5.1 Physical aspects of corona from conductors
5.1.1 General
128 5.1.2 Factors in corona generation
129 5.2 Methods of investigation of corona by cages and test lines
5.2.1 General
5.2.2 Test cages
130 5.2.3 Test lines
5.3 Methods of predetermination
5.3.1 General
131 5.3.2 Analytical methods
5.3.3 CIGRÉ method
132 5.4 Catalogue of standard profiles
5.4.1 General
5.4.2 Principle of catalogue presentation
133 6 Radio noise levels due to insulators, hardware and substation equipment (excluding bad contacts)
6.1 Physical aspects of radio noise sources
6.1.1 General
134 6.1.2 Radio noise due to corona discharges at hardware
6.1.3 Radio noise due to insulators
135 6.2 Correlation between radio noise voltage and the corresponding field strength for distributed and individual sources
6.2.1 General
136 6.2.2 Semi-empirical approach and equation
138 6.2.3 Analytical methods
6.2.4 Example of application
139 6.3 Influence of ambient conditions
7 Sparking due to bad contacts
7.1 Physical aspects of the radio noise phenomenon
140 7.2 Example of gap sources
141 8 Radio noise from HVDC overhead power lines
8.1 General [56, 57]
8.1.1 Description of electric field physical phenomena of HVDC transmission systems
142 8.1.2 Description of radio interference phenomena of HVDC transmission system
8.2 Physical aspects of DC corona
143 8.3 Formation mechanism of a noise field from a DC line
8.4 Characteristics of the radio noise from DC lines
8.4.1 General
8.4.2 Frequency spectrum
144 8.4.3 Lateral profile
8.4.4 Statistical distribution
8.5 Factors influencing the radio noise from DC lines
8.5.1 General
145 8.5.2 Conductor surface conditions
8.5.3 Conductor surface gradient
146 8.5.4 Polarity
8.5.5 Weather conditions
147 8.5.6 Subjective effects
8.6 Calculation of the radio noise level due to conductor corona
149 8.7 Radio noise due to insulators, hardware and substation equipment
8.8 Valve firing effects
151 9 Figures
Figures
Figure 1 – Typical lateral attenuation curves for high voltage lines, normalized to a lateral distance of y0 = 15 m, distance in linear scale
152 Figure 2 – Typical lateral attenuation curves for high voltage lines, normalized to a direct distance of D0 = 20 m, distance in logarithmic scale
153 Figure 3 – Examples of statistical yearly distributions of radio-noise levels recorded continuously under various overhead lines
154 Figure 4 – Examples of statistical yearly distributions of radio-noise levels recorded continuously under various overhead lines
155 Figure 5 – Example of statistical yearly distributions of radio-noise levels recorded continuously under various overhead lines
156 Figure 6 – Examples of statistical yearly distributions of radio-noise levels recorded continuously under various overhead lines
157 Figure 7 – Equipotential lines for clean and dry insulation units
Figure 8 – Determination of the magnetic field strength from aperpendicular to a section of a line, at a distance x fromthe point of injection of noise current I
158 Figure 9 – Longitudinal noise attenuation versus distance from noise source(from test results of various experiments frequencies around 0,5 MHz)
159 Figure 10 – Lateral profile of the radio noise field strength produced by distributed discrete sources on a 420 kV line of infinite length
160 Figure 11 – Impulsive radio-noise train of gap-type discharges
Figure 12 – Example of relative strength of radio noise field as a function of frequency below 1 GHz using QP detector
161 Figure 13 – Example of relative strength of radio noise field due to gap discharge as a function of frequency 200 MHz to 3 GHz using peak detector
Figure 14 – Example of relative strength of radio noise field as a function of the distance from the line
162 Figure 15 – Unipolar and bipolar space charge regions of a HVDC transmission line
Figure 16 – The corona current and radio interference field
163 Annexes
Annex A (informative) Calculation of the voltage gradient at the surface of a conductor of an overhead line
167 Annex B (informative) Catalogue of profiles of radio noise field due to conductor corona for certain types of power line
Tables
Table B.1 – List of profiles
168 Figure B.1 – Triangular formation (1)
169 Figure B.2 – Triangular formation (2)
170 Figure B.3 – Flat formation
171 Figure B.4 – Arched formation
172 Figure B.5 – Flat wide formation
173 Figure B.6 – Vertical formation (480 (Rail) X 4B)
174 Figure B.7 – Flat formation
175 Figure B.8 – Flat formation
176 Figure B.9 – Arched formation
177 Figure B.10 – Flat formation
178 Figure B.11 – Arched formation
179 Figure B.12 – Flat formation
180 Figure B.13 – Vertical formation (480 (Cardinal) X 6B)
181 Figure B.14 – Typical frequency spectra for the radio noise fields of high voltage power lines
182 Figure B.15 – Prediction of radio noise level of a transmission line for various types of weather
183 Annex C (informative) Summary of the catalogue of radio noise profiles according to the recommendations of the CISPR
Table C.1 – Radio noise profiles
184 Figure C.1 – Examples of transformations of the profiles of Figures B.1 to B.13 using the direct distance of 20 m as reference
185 Bibliography

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BSI PD CISPR/TR 18-1:2017 - TC
$280.87