BSI PD CISPR/TR 18-1:2010
$215.11
Radio interference characteristics of overhead power lines and high- voltage equipment – Description of phenomena
| Published By | Publication Date | Number of Pages |
| BSI | 2010 | 76 |
This part of CISPR 18, 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 scope of this publication 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 broadcast services.
The frequency range covered is 0,15 MHz to 300 MHz.
Radio frequency interference caused by the pantograph of overhead railway traction systems is not considered in this technical report.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | CONTENTS |
| 7 | FOREWORD |
| 9 | INTRODUCTION |
| 10 | 1 Scope 2 Normative references 3 Terms and definitions |
| 11 | 4 Radio noise from power lines 4.1 General 4.2 Physical aspects of radio noise |
| 15 | 4.3 Main characteristics of the noise field resulting from conductor corona |
| 19 | 5 Effects of corona from conductors 5.1 Physical aspects of corona from conductors |
| 21 | 5.2 Methods of investigation of corona by cages and test lines |
| 22 | 5.3 Methods of predetermination |
| 23 | 5.4 Catalogue of standard profiles |
| 25 | 6 Radio noise levels due to insulators, hardware and substation equipment (excluding bad contacts) 6.1 Physical aspects of radio noise sources |
| 27 | 6.2 Correlation between radio noise voltage and the corresponding field strength for distributed and individual sources |
| 30 | 6.3 Influence of ambient conditions 7 Sparking due to bad contacts 7.1 Physical aspects of the radio noise phenomenon |
| 31 | 7.2 Example of gap sources |
| 32 | 8 Special d.c. effects 8.1 General 8.2 Effects of corona from conductors |
| 36 | 8.3 Radio noise due to insulators, hardware and substation equipment 8.4 Valve firing effects |
| 38 | 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 |
| 39 | Figure 2 – Typical lateral attenuation curves for high voltage lines, normalized to a direct distance of D0 = 20 m, distance in logarithmic scale |
| 40 | Figure 3 – Examples of statistical yearly distributions of radio-noise levels recorded continuously under various overhead lines |
| 41 | Figure 4 – Examples of statistical yearly distributions of radio-noise levels recorded continuously under various overhead lines |
| 42 | Figure 5 – Example of statistical yearly distributions of radio-noise levels recorded continuously under various overhead lines |
| 43 | Figure 6 – Examples of statistical yearly distributions of radio-noise levels recorded continuously under various overhead lines |
| 44 | Figure 7 – Equipotential lines for clean and dry insulation units |
| 45 | Figure 8 – Determination of the magnetic field strength from a perpendicular to a section of a line, at a distance x from the point of injection of noise current I Figure 9 – Longitudinal noise attenuation versus distance from noise source (from test results of various experiments frequencies around 0,5 MHz) |
| 46 | Figure 10 – Lateral profile of the radio noise field strength produced by distributed discrete sources on a 420 kV line of infinite length |
| 47 | Figure 11 – Example of relative strength of radio noise field as a function of frequency Figure 12 – Example of relative strength of radio noise field as a function of the distance from the line |
| 48 | Annex A (informative) Calculation of the voltage gradient at the surface of a conductor of an overhead line |
| 52 | Annex B (informative) Catalogue of profiles of radio noise field due to conductor corona for certain types of power line Table B.1 – List of profiles |
| 53 | Figure B.1 – Triangular formation (1) |
| 54 | Figure B.2 – Triangular formation (2) |
| 55 | Figure B.3 – Flat formation |
| 56 | Figure B.4 – Arched formation |
| 57 | Figure B.5 – Flat wide formation |
| 58 | Figure B.6 – Vertical formation (480 (Rail) X 4B) |
| 59 | Figure B.7 – Flat formation |
| 60 | Figure B.8 – Flat formation |
| 61 | Figure B.9 – Arched formation |
| 62 | Figure B.10 – Flat formation |
| 63 | Figure B.11 – Arched formation |
| 64 | Figure B.12 – Flat formation |
| 65 | Figure B.13 – Vertical formation (480 (Cardinal) X 6B) |
| 66 | Figure B.14 – Typical frequency spectra for the radio noise fields of high voltage power lines |
| 67 | Figure B.15 – Prediction of radio noise level of a transmission line for various types of weather |
| 68 | Annex C (informative) Summary of the catalogue of radio noise profiles according to the recommendations of the CISPR |
| 69 | 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 |
| 70 | Bibliography |
