🔥🔥 Don’t Miss Out on Our End of Autumn Sale. If you have any questions, feel free to click the bottom right corner to contact our customer service..

Concat us[email protected]
Shopping Cart

No products in the cart.

🔍
BSI PD CISPR/TR 18-1:2017

BSI PD CISPR/TR 18-1:2017

$215.11

Radio interference characteristics of overhead power lines and high-voltage equipment – Part 1: Description of phenomena

Published By Publication Date Number of Pages
BSI 2017 84
PDF Format Searchable Printable Preview Now
Guaranteed Safe Checkout
Categories: ,

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

This part of CISPR 18, 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.

PDF Catalog

PDF Pages PDF Title
2 National foreword
4 CONTENTS
7 FOREWORD
9 INTRODUCTION
11 1 Scope
2 Normative references
3 Terms and definitions
12 4 Radio noise from HV AC overhead power lines
4.1 General
13 4.2 Physical aspects of radio noise
4.2.1 Mechanism of formation of a noise field
15 4.2.2 Definition of noise
16 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
17 4.3.3 Lateral profile
19 4.3.4 Statistical distribution with varying seasons and weather conditions
20 5 Effects of corona from conductors
5.1 Physical aspects of corona from conductors
5.1.1 General
21 5.1.2 Factors in corona generation
22 5.2 Methods of investigation of corona by cages and test lines
5.2.1 General
5.2.2 Test cages
23 5.2.3 Test lines
5.3 Methods of predetermination
5.3.1 General
24 5.3.2 Analytical methods
5.3.3 CIGRÉ method
25 5.4 Catalogue of standard profiles
5.4.1 General
5.4.2 Principle of catalogue presentation
26 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
27 6.1.2 Radio noise due to corona discharges at hardware
6.1.3 Radio noise due to insulators
28 6.2 Correlation between radio noise voltage and the corresponding field strength for distributed and individual sources
6.2.1 General
29 6.2.2 Semi-empirical approach and equation
31 6.2.3 Analytical methods
6.2.4 Example of application
32 6.3 Influence of ambient conditions
7 Sparking due to bad contacts
7.1 Physical aspects of the radio noise phenomenon
33 7.2 Example of gap sources
34 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
35 8.1.2 Description of radio interference phenomena of HVDC transmission system
8.2 Physical aspects of DC corona
36 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
37 8.4.3 Lateral profile
8.4.4 Statistical distribution
8.5 Factors influencing the radio noise from DC lines
8.5.1 General
38 8.5.2 Conductor surface conditions
8.5.3 Conductor surface gradient
39 8.5.4 Polarity
8.5.5 Weather conditions
40 8.5.6 Subjective effects
8.6 Calculation of the radio noise level due to conductor corona
42 8.7 Radio noise due to insulators, hardware and substation equipment
8.8 Valve firing effects
44 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
45 Figure 2 – Typical lateral attenuation curves for high voltage lines, normalized to a direct distance of D0 = 20 m, distance in logarithmic scale
46 Figure 3 – Examples of statistical yearly distributions of radio-noise levels recorded continuously under various overhead lines
47 Figure 4 – Examples of statistical yearly distributions of radio-noise levels recorded continuously under various overhead lines
48 Figure 5 – Example of statistical yearly distributions of radio-noise levels recorded continuously under various overhead lines
49 Figure 6 – Examples of statistical yearly distributions of radio-noise levels recorded continuously under various overhead lines
50 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
51 Figure 9 – Longitudinal noise attenuation versus distance from noise source(from test results of various experiments frequencies around 0,5 MHz)
52 Figure 10 – Lateral profile of the radio noise field strength produced by distributed discrete sources on a 420 kV line of infinite length
53 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
54 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
55 Figure 15 – Unipolar and bipolar space charge regions of a HVDC transmission line
Figure 16 – The corona current and radio interference field
56 Annexes
Annex A (informative) Calculation of the voltage gradient at the surface of a conductor of an overhead line
60 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
61 Figure B.1 – Triangular formation (1)
62 Figure B.2 – Triangular formation (2)
63 Figure B.3 – Flat formation
64 Figure B.4 – Arched formation
65 Figure B.5 – Flat wide formation
66 Figure B.6 – Vertical formation (480 (Rail) X 4B)
67 Figure B.7 – Flat formation
68 Figure B.8 – Flat formation
69 Figure B.9 – Arched formation
70 Figure B.10 – Flat formation
71 Figure B.11 – Arched formation
72 Figure B.12 – Flat formation
73 Figure B.13 – Vertical formation (480 (Cardinal) X 6B)
74 Figure B.14 – Typical frequency spectra for the radio noise fields of high voltage power lines
75 Figure B.15 – Prediction of radio noise level of a transmission line for various types of weather
76 Annex C (informative) Summary of the catalogue of radio noise profiles according to the recommendations of the CISPR
Table C.1 – Radio noise profiles
77 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
78 Bibliography

Related products

BSI PD CISPR/TR 18-1:2017
$215.11