Method for suppressing waving of extra-high voltage bundled conductor

Abstract

The invention discloses a method for suppressing the waving of an extra-high voltage bundled conductor and belongs to the field of power transmission. According to the method, a rotatable wire clamp is arranged and can freely rotate within a certain range in the axial direction of holding a conductor core center; according to the characteristic that eccentric torsion occurs under the action of gravity when the conductor is coated with ice, the rotatable wire clamp is utilized and freely rotates in the axial direction of holding the conductor core center; and within the rotating range, the conductor is coated with the ice, and the eccentric torsion occurs under the action of gravity, so that non-round section can be effectively avoided, and lift force or torque cannot be exerted on the conductor which is blown by wind. According to the technical scheme, a structure that the conductor held by the rotatable wire clamp can freely rotate along the longitudinal axis of the conductor is adopted; and on the premise of changing and adjusting parameters of a conductor system, the phenomenon that the non-round section is formed when the conductor is coated with the ice is avoided, so that an effect of suppressing the waving of the extra-high voltage bundled conductor is achieved. The method can be widely applied to the field of the suppression of the waving of the extra-high voltage bundled conductor.

Description

technical field [0001] The invention belongs to the field of power transmission, in particular to a method for suppressing galloping of UHV overhead transmission lines. Background technique [0002] UHV power transmission has the characteristics of large capacity, long distance, and low loss, which urges my country to pay close attention to the construction of UHV projects. [0003] In the construction of UHV projects, galloping of overhead transmission lines is a frequent worldwide problem. [0004] Galloping of overhead transmission lines (hereinafter referred to as galloping) is a low-frequency, large-amplitude self-excited vibration generated by eccentric ice-coated conductors under wind excitation. [0005] Galloping, because of its large vibration amplitude, can cause short-circuit and flashover accidents. In addition, it will cause excessive tension changes to the wires, and will also cause mechanical damage to the tower, wires, fittings and components, resulting in ...

AI Technical Summary

Problems solved by technology

[0015] However, in these anti-galling technical solutions, the rotary clamps fixed on the central bracket or the fixed bracket all adopt a mechanical structure that is pinned to the central bracket or the fixed bracket, and the rotary clamps can only be fixed on the central bracket or the fixed bracket. limited rotation in the radial direction of the wire (that is, the radial direction of the wire), so that the wire held by it (that is, the aforementioned sub-wire or split wire, for the sake of brevity, is collectively referred to as the wire, the same below) along the The longitudinal axis of the wire rotates completely freely, so the eccentric icing phenomenon described above cannot be completely avoided, and the uneven formation of icing cannot be well prevented. Therefore, under strong wind climatic conditions, its anti-galling not effectively

[0016] However, anti-galling technical solutions for ultra-high voltage or ultra-high voltage transmission lines, or for high-splitting conductors, have not been reported yet.

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