Original real-time observations of aeolian vibrations on power-line conductors

in IEEE Transactions on Power Delivery (2011), 26(4), 2111-2117

Aeolian vibrations of power lines are induced by Von Karman vortex shedding. Vortex shedding is characterized by vibration frequencies in the approximate range of 3-100 Hz (sometimes higher) and by ... [more ▼]

Aeolian vibrations of power lines are induced by Von Karman vortex shedding. Vortex shedding is characterized by vibration frequencies in the approximate range of 3-100 Hz (sometimes higher) and by amplitudes that can reach conductor diameter for the lower range of frequencies, under very slow to medium wind speed (0.5 m/s to about 7 m/s). Conductor vibration causes localized bending, which may cause fatigue failure of the conductor strands. The amplitude of vibration very much depends on conductor self damping, which may be very low. The purpose of this paper to show measurements of these vibrations carried out by a new experimental device (developed by the authors), which is able to perform continuous measurements in the full range of frequencies and amplitudes. A statistical overview of measurements is presented and Lifetime is estimated. [less ▲]

Full-scale tests of torsional damper and detuner (TDD) antigalloping device

in IEEE Transactions on Power Delivery (2002), 17(2), 638-643

A new antigalloping device for overhead lines with bundle conductors was introduced ten years ago, after laboratory tests and observations on actual 400-kV lines. A systematic fullscale test was performed ... [more ▼]

A new antigalloping device for overhead lines with bundle conductors was introduced ten years ago, after laboratory tests and observations on actual 400-kV lines. A systematic fullscale test was performed in Kazakhstan in order to better evaluate torsional damper and detuner (TDD) efficiency. This report details the test station and the results obtained over a several month period of testing and measurement. The tests were carried out thanks to the mutual efforts of the ESSP and the Kazakh Power Research Institute (KazNIIE) at the field tests stand located in Chokpar. [less ▲]

Calculation of spacer compression for bundle lines under short-circuit.

in IEEE Transactions on Power Delivery (2000), 15(N°2), 839-845

Short-circuit tests results and proposal of a new method to improve Manuzio formula on bundle conductors spacer compression.

Spacer Compression for a tripple conductor bundle

in IEEE Transactions on Power Delivery (2000), 15(N°1), 236-241

Spacer compression analysis based on tests and proposed simple method

A new theory for torsional stiffness of multi-span bundle overhead transmission lines.

in IEEE Transactions on Power Delivery (1998), 13(N°4), 1405-1411

A new theory for torsional stiffness of multi-span bundle overhead lines is presented.

A new damper to solve galloping on bundled lines. Theoretical background, laboratory and field results.

in IEEE Transactions on Power Delivery (1998), 13(N°1), 260-265

A new kind of anti-galloping device for bundled lines is presented.