BSI PD CISPR/TR 18-2:2017
$215.11
Radio interference characteristics of overhead power lines and high-voltage equipment – Part 2: Methods of measurement and procedure for determining limits
| Published By | Publication Date | Number of Pages |
| BSI | 2017 | 80 |
CISPR TR 18-2:2017 est disponible sous forme de CISPR TR 18-2:2017 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l’édition précédente.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 4 | CONTENTS |
| 8 | FOREWORD |
| 10 | INTRODUCTION |
| 12 | 1 Scope 2 Normative references |
| 13 | 3 Terms and definitions 4 Measurements 4.1 Measuring instruments 4.1.1 Response of a standard quasi-peak CISPR measuring receiver to AC generated corona noise |
| 14 | 4.1.2 Other measuring instruments 4.2 On-site measurements on HV overhead power lines 4.2.1 General 4.2.2 Measurements in the frequency range 0,15 MHz to 30 MHz |
| 16 | 4.2.3 Measurements in the frequency range from 30 MHz to 300 MHz |
| 17 | 4.2.4 Measurements in the frequency range from 300 MHz to 3 GHz 4.3 Statistical evaluation of the radio noise level of a line |
| 18 | Tables Table 1 – Number of n sets of the radio noise level measurements and corresponding values for factor k |
| 19 | 4.4 Additional information to be given in the report 4.5 Measurements on HV equipment in the laboratory 4.5.1 Overview 4.5.2 State of the test object |
| 20 | 4.5.3 Test area 4.5.4 Atmospheric conditions 4.5.5 Test circuit – Basic diagram |
| 21 | 4.5.6 Practical arrangement of the test circuit 4.5.7 Test circuit components |
| 22 | 4.5.8 Measuring receiver connections |
| 23 | 4.5.9 Mounting and arrangement of test object 4.5.10 Measurement frequency 4.5.11 Checking of the test circuit |
| 24 | 4.5.12 Calibration of the test circuit |
| 25 | 4.5.13 Test procedure |
| 26 | 4.5.14 Related observations during the test 4.5.15 Data to be given in test report 5 Methods for derivation of limits for HV power systems 5.1 Overview |
| 27 | 5.2 Significance of CISPR limits for power lines |
| 28 | 5.3 Technical considerations for derivation of limits for lines 5.3.1 Basic approach 5.3.2 General |
| 29 | 5.3.3 Minimum broadcast signal levels to be protected Table 2 – Minimum usable broadcast signal field strengths in the v.h.f bands according to CCIR |
| 30 | 5.3.4 Required signal-to-noise ratio |
| 31 | 5.3.5 Use of data on radio noise compiled during measurements in the field |
| 32 | 5.3.6 Use of data obtained by prediction of the radio noise from high-voltage overhead power lines |
| 33 | 5.4 Methods of determining compliance of measured data with limits 5.4.1 Long-term recording 5.4.2 Sampling method |
| 34 | 5.4.3 Survey methods 5.4.4 Alternative criteria for an acceptable noise level |
| 35 | 5.5 Examples for derivation of limits in the frequency range below 30 MHz 5.5.1 Radio reception |
| 37 | 5.5.2 Television reception, 47 MHz to 230 MHz 5.5.3 Digital terrestrial television reception, 470 MHz to 950 MHz 5.6 Additional remarks 5.7 Technical considerations for derivation of limits for line equipment and HVAC substations 5.7.1 General |
| 38 | 5.7.2 Current injected by line components and hardware 5.7.3 Current injected by substation equipment |
| 39 | 5.7.4 Practical derivation of limits in the l.f. and m.f. band |
| 40 | 6 Methods for derivation of limits for the radio noise produced by insulator sets 6.1 General considerations |
| 41 | 6.2 Insulator types 6.3 Influence of insulator surface conditions 6.3.1 General |
| 42 | 6.3.2 Clean insulators 6.3.3 Slightly polluted insulators 6.3.4 Polluted insulators |
| 43 | 6.4 Criteria for setting up radio noise limits for insulators 6.4.1 General 6.4.2 Criterion for insulators to be installed in type A areas 6.4.3 Criterion for insulators to be installed in type B areas |
| 44 | 6.4.4 Criterion for insulators to be installed in type C areas 6.5 Recommendations |
| 45 | Table 3 – Recommendations for the radio noise voltage limits and for the test methods for insulator sets installed in different areas |
| 46 | 7 Methods for derivation of limits for the radio noise due to HVDC converter stations and similar installations 7.1 General considerations 7.2 Sources of interference 7.2.1 Mechanism of radio noise generation |
| 48 | 7.2.2 Influence of station design on radio interference 7.3 Radiated fields from valve halls 7.3.1 Frequency spectra 7.3.2 Lateral attenuation 7.3.3 Reduction of the radio interference due to direct radiation from the valve hall |
| 49 | 7.4 Conducted interference along the transmission lines 7.4.1 Description of the mechanism and typical longitudinal profiles |
| 50 | 7.4.2 Reduction of the interference conducted along the transmission lines 7.5 General criteria for stating limits 7.5.1 Overview 7.5.2 Direct radiation 7.5.3 Propagation along the lines |
| 52 | 8 Figures Figures Figure 1 – Transformation of pulses through a CISPR measuring receiver |
| 53 | Figure 2 – Bursts of corona pulses generated by alternating voltage Figure 3 – Example of extrapolation to determine the radio noise field strength reference level of a power line, here at the direct reference distance of 20 m |
| 54 | Figure 4 – Basic test circuit Figure 5 – Standard test circuit |
| 55 | Figure 6 – Connection to the measuring receiver by a coaxial cable Figure 7 – Connection to the measuring receiver by a balanced cable Figure 8 – Special test circuit |
| 56 | Figure 9 – Arrangement for calibration of the standard test circuit |
| 57 | Figure 10 – Map showing boundaries of zones A, B, and C in regions 1 and 3 |
| 58 | Figure 11 – Illustration of the four basic parameters for a power transmission line |
| 59 | Figure 12 – Example of typical statistical yearly "all-weather" distributions of the radio-noise levels of a bipolar direct current line (—–) and for an alternating current line in a moderate climate (- – -) Figure 13 – Example of radio noise voltage level V, as a function of the relative air humidity R.H., in clean conditions and slightly polluted conditions, of astandard insulator (—–) and a particular type of "low noise" insulator (- – -) |
| 60 | Figure 14 – Example of frequency spectra of pulses with different rise times, simulating commutation phenomena in mercury valves and in thyristor valves |
| 61 | Figure 15 – Example of frequency spectra of the radio interference recorded outside the hall of a mercury arc valve converter station with and without toroidal filters Figure 16 – Example of frequency spectra of the radio interference recorded outside the hall of a thyristor valve converter station for different operating conditions |
| 62 | Figure 17 – Attenuation of the field strength as a function of the distance on a horizontal plane, for different frequencies |
| 63 | Figure 18 – Example of frequency spectrum of the radio interference in the vicinity of a DC line (30 m) at a short distance from the converter station |
| 64 | Figure 19 – Example of frequency spectra of the radio interference in the vicinity of an AC line (20 m) at a short distance from the converter station Figure 20 – Frequency spectra of radio interference at 20 m from the electrode line at 1,5 km from the Gotland HVDC link in Sweden with mercury arc groupsor thyristor groups in operation |
| 65 | Figure 21 – Frequency spectra of radio interference at 20 m from the electrode line at 1,5 km and 4,5 km from the Gotland HVDC link in Sweden with mercury arc groups in operation Figure 22 – Frequency spectra of the radio interference recorded along a 200 kV DC line, at 20 m from the conductor, at different distances from the converter station |
| 66 | Annexes Annex A (informative) Radio interference measuring apparatus differing from the CISPR basic standard instruments |
| 67 | Annex B (normative) List of additional information to be included in the report on the results of measurements on operational lines |
| 68 | Annex C (informative) Minimum radio signal levels to be protected –ITU recommendations Table C.1 – Minimum field strength (l.f. and m.f. radio) Table C.2 – Nominal usable field strength |
| 69 | Table C.3 – Minimum field strength (h.f. radio) |
| 70 | Table C.4 – Field strength limit (amateur radio) |
| 71 | Annex D (informative) Minimum broadcast signals to be protected –North American standards Table D.1 – Signal levels at the edge of the service area in North America |
| 72 | Annex E (informative) Required signal-to-noise ratios for satisfactory reception Table E.1 – Summary of signal-to-noise ratios for corona from AC lines (Signal measured with average detector, noise measured with quasi-peak detector) |
| 73 | Table E.2 – Quality of radio reception or degree of annoyance due to RFI |
| 75 | Annex F (informative) Derivation of the equation for the protected distance |
| 76 | Bibliography |
Related products
-
BSI PD CISPR/TR 18-2:2017 – TC:2020 Edition
Tracked Changes. Radio interference characteristics of overhead power lines and high-voltage equipment – Methods of…
