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- Conductor_gallop abstract "Conductor gallop is the high-amplitude, low-frequency oscillation of overhead power lines due to wind. The movement of the wires occur most commonly in the vertical plane, although horizontal or rotational motion is also possible. The natural frequency mode tends to be around 1 Hz, leading the often graceful periodic motion to also be known as conductor dancing. The oscillations can exhibit amplitudes in excess of a metre, and the displacement is sometimes sufficient for the phase conductors to infringe operating clearances (coming too close to other objects), and causing flashover. The forceful motion also adds significantly to the loading stress on insulators and electricity pylons, raising the risk of mechanical failure of either.The mechanisms that initiate gallop are not always clear, though it is thought to be often caused by asymmetric conductor aerodynamics due to ice build up on one side of a wire. The crescent of encrusted ice approximates an aerofoil, altering the normally round profile of the wire and increasing the tendency to oscillate.Gallop can be a significant problem for transmission system operators, particularly where lines cross open, windswept country and are at risk to ice loading. If gallop is likely to be a concern, designers can employ smooth-faced conductors, whose improved icing and aerodynamic characteristics reduce the motion. Additionally, anti-gallop devices may be mounted to the line to convert the lateral motion to a less damaging twisting one. Increasing the tension in the line and adopting more rigid insulator attachments have the effect of reducing galloping motion. These measures can be costly, are often impractical after the line has been constructed, and can increase the tendency for the line to exhibit high frequency oscillations.Once gallop has started on a transmission line, an operator's options are more limited. If ice loading is suspected, it may be possible to increase power transfer on the line, and so raise its temperature by Joule heating, melting the ice. The sudden loss of ice from a line can result in a phenomenon called \"jump\", in which the catenary dramatically rebounds upwards in response to the change in weight. If the risk of trip is high, the operator may elect to pre-emptively switch out the line in a controlled manner rather than face an unexpected fault. The risk of mechanical failure of the line remains.".
- Conductor_gallop wikiPageExternalLink clip_23_49.mpg.
- Conductor_gallop wikiPageID "4133988".
- Conductor_gallop wikiPageLength "7310".
- Conductor_gallop wikiPageOutDegree "21".
- Conductor_gallop wikiPageRevisionID "655903637".
- Conductor_gallop wikiPageWikiLink Aerodynamics.
- Conductor_gallop wikiPageWikiLink Aeroelasticity.
- Conductor_gallop wikiPageWikiLink Airfoil.
- Conductor_gallop wikiPageWikiLink Category:Aerodynamics.
- Conductor_gallop wikiPageWikiLink Category:Electric_power_transmission.
- Conductor_gallop wikiPageWikiLink Category:Mechanical_vibrations.
- Conductor_gallop wikiPageWikiLink Electric_arc.
- Conductor_gallop wikiPageWikiLink Insulator_(electricity).
- Conductor_gallop wikiPageWikiLink Joule_heating.
- Conductor_gallop wikiPageWikiLink Kármán_vortex_street.
- Conductor_gallop wikiPageWikiLink Overhead_line.
- Conductor_gallop wikiPageWikiLink Overhead_power_line.
- Conductor_gallop wikiPageWikiLink Polyphase_system.
- Conductor_gallop wikiPageWikiLink Reynolds_number.
- Conductor_gallop wikiPageWikiLink Stockbridge_damper.
- Conductor_gallop wikiPageWikiLink Tension_(physics).
- Conductor_gallop wikiPageWikiLink Transmission_system_operator.
- Conductor_gallop wikiPageWikiLink Transmission_tower.
- Conductor_gallop wikiPageWikiLink Tuned_mass_damper.
- Conductor_gallop wikiPageWikiLink Vortex.
- Conductor_gallop wikiPageWikiLink Windward_and_leeward.
- Conductor_gallop wikiPageWikiLinkText "Conductor gallop".
- Conductor_gallop wikiPageWikiLinkText "Gallop".
- Conductor_gallop wikiPageWikiLinkText "cause them to touch".
- Conductor_gallop wikiPageWikiLinkText "flutter".
- Conductor_gallop wikiPageWikiLinkText "gallop".
- Conductor_gallop wikiPageWikiLinkText "singing".
- Conductor_gallop wikiPageUsesTemplate Template:Reflist.
- Conductor_gallop subject Category:Aerodynamics.
- Conductor_gallop subject Category:Electric_power_transmission.
- Conductor_gallop subject Category:Mechanical_vibrations.
- Conductor_gallop hypernym Oscillation.
- Conductor_gallop type Dynamic.
- Conductor_gallop type Mechanic.
- Conductor_gallop type Vibration.
- Conductor_gallop comment "Conductor gallop is the high-amplitude, low-frequency oscillation of overhead power lines due to wind. The movement of the wires occur most commonly in the vertical plane, although horizontal or rotational motion is also possible. The natural frequency mode tends to be around 1 Hz, leading the often graceful periodic motion to also be known as conductor dancing.".
- Conductor_gallop label "Conductor gallop".
- Conductor_gallop sameAs Q5159402.
- Conductor_gallop sameAs گالوپینگ.
- Conductor_gallop sameAs ギャロッピング現象.
- Conductor_gallop sameAs m.0bkyw4.
- Conductor_gallop sameAs Q5159402.
- Conductor_gallop wasDerivedFrom Conductor_gallop?oldid=655903637.
- Conductor_gallop isPrimaryTopicOf Conductor_gallop.