Аннотация
The paper presents the results of
mass measurements of radio and television
interference from a 750 kV line. As a
result of comparison between the values
recommended by the rules and RI measurement
data permissible electric 1'ield
gradients on the surface of 750 kV line
conductors have been obtained.
Peak and quasi-peak values of TVI
intencity were measured and relationships
between them defined. For the 30-700 MHz
frequency range the law of TVI attenuation
with increasing distance from the line
was determined and frequency spectra from
various interference sources were found.
TVI levels from gap discharge were
observed to be maximum in fair weather,
and from corona on conductors - in heavy
precipitation. Integral curves of interference
distribution were obtained basing
upon the results of statistical measurements.
The measurements at high frequences
permit to detect 11noisy11 towers generating
the higher levels of interference from gap
discharges on fittings and insulators.
The 750 kV line designs with different
conductors and loss levels, meeting
the requirements of RI and TVI limitation,
are considered. The advantages of 5-conductors
bundle design are demonstr~ted.
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