Abstract
Wind-induced vibrations are known to cause damage to the conductors and related hardware through fatigue
or clashing of the bundled conductors. Eskom has decided to follow a comprehensive programme on the
control ofoverhead mechanical oscillations, which includes aeolian and wake-induced vibration. A full scale
transmission line test station, situated in the Orange Free State in South Africa, is being utilised for the
studying of both aeolian and wake-induced vibration. Vibration data, consisting of both level of vibration
and frequency, as well as windspeed and wind direction, were logged over a two and a half month period and
analysed. Results indicate that the Stockbridge damper and Spacer dampers, as tested during this period,
are all effective for the damping of aeolian vibration. The vibration levels experienced by all of the undamped
single conductors, all exceed their respective safe bending amplitudes. A summary is provided, indicating
results and experience obtained from the test site to date.
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