Abstract
The paper presents results of studies concerning wind-induced aeolian vibration and fatigue
of a 110 kV covered conductor overhead line. Self-damping measurement techniques are discussed: power
method is found to be the most reliable technique. A method for compensating tension variations during the
self-damping test is presented. Generally used empirical self-damping power models are enhanced and the
different models are compared with each other. The Energy Balance Analysis (EBA) is used to calculate
the aeolian vibration amplitudes, which thereafter are converted to bending stress for the calculation of
conductor lifetime estimate. The results of EBA are compared with field measurements. Results indicate
that adequate lifetime estimates are produced by EBA as well as field measurements. Generally the EBA
gives more conservative lifetime expectancy. This is believed to result from the additional damping
existing in true suspension structures not taken into account by EBA. Finally, the correctness of the line
design is velified using Cigre's safe design tension approach.
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