Fostering galloping solutions grounded in technical research.
Galloping is a function of wind speed and the aeroelastic properties of the transmission system. AR anti-galloping dampers reduce high-amplitude galloping by twisting the conductor, using aerodynamics and eccentric weights, installation methods and application to transform single and double loop gallop sine waves into a 3-loop sine wave. As wind/ice create galloping conditions, the gravitational force of the AR damper causes the conductor to start twisting and effectively dumping off the aerodynamic lift that leads to galloping conductors.
Comparing anti-galloping devices
|Comparing anti-galloping devices
|Air Flow Spoilers
|Reduces galloping ~ 38 percent Applied to at least 25% of span to be effective Up to 230kV
|Reduces galloping ~52 percent Raises critical wind speed in galloping conditions Uses acceleration and inertia to increase rotational oscillations
|Limited effectiveness in controlling galloping
|Guards against flash-over Synchronizes galloping motion, does not control it. Limited service life
|MOD2 Spacer Dampers
|Reduces galloping ~56 percent Articulating clamps twist and rotate subconductors to control galloping and maintain bundle spacing. Impact damper design dissipates energy to reduce conductor motion and Aeolian vibration.
|Reduces galloping ~70% Uses aerodynamics to reduce dynamic lift Service life can exceed 40 years; deployed in long spans like river crossings