Conference,

ICE ACCRETIONS ON CONDUCTORS OF OVERHEAD ELECTRICAL LINES RESULTS OF YEARS OF RESEARCH

, and .
(1981)

Abstract

Ice, or ice and wind, on conductors in general account for the most critical loading to be taken into consideration in the design of towers, when a line is located in an area subject to these meteorological phenomena. The most critical areas in this respect, in Italy, are the mountainous regions of the Appennines, which run longitudinally from one end of the country to the other. Since the 420 kV system was first developed, a series of experimental facilities have been installed in the Appennines, to investigate icing problems: in particular, these consist of a series of simple devices, which provide only the maximum yearly ice overload in a given area, and a more complete experimental station in a very critical area (Frad~ rena Pass) for the study of the influence of all the parameters affecting ice formation on conductors. The report states the main principles on which the test facilities are based, and summarizes the results of more thar. 10 years of keeping records, giving the correlations obtained between the differrent parameters (i.e., ice formation as a function of conductor diameter, height above ground, wind characteristics, conductor temperature, etcc.).

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