Anti-galloping method of overhead lines, and pre-formed sub-conductor spacer for phase-to-phase spacing

Abstract

The invention relates to an anti-galloping method of overhead lines, and a pre-formed sub-conductor spacer for phase-to-phase spacing, and belongs to the technical field of overhead line transmission of electricity. The technical scheme includes that a sub-conductor spacer main body (1) is arranged between two adjacent overhead conductors (5); rubber gasket layers (4) wrap on the overhead conductors, pre-formed armor rods (2) wind to form spiral wires which wind on the outer surfaces of the overhead conductors wrapped by the rubber gasket layers, and the pre-formed armor rods, the overhead conductors and the rubber gasket layers are integrally fixed; wire clamps of the pre-formed armor rods (3) are arranged outside the pre-formed armor rods, and the rubber gasket layers are located at the positions of the wire clamps of the pre-formed armor rods; the sub-conductor spacer main body is connected with the two adjacent overhead conductors through the wire clamps of the pre-formed armor rods. The anti-galloping method of the overhead lines, and the pre-formed sub-conductor spacer for phase-to-phase spacing effectively reduces constant and frequent alternating / impact mechanical load of phase-to-phase spacing spacers of the overhead lines on the conductors through the sub-conductor spacer main body, effectively increases the stressed area of the overhead conductors, eliminates stress concentration to the maximum extent, and effectively ensures safety of the overhead conductors.

Description

technical field [0001] The invention relates to an anti-galling method for an overhead line and a pre-twisted sub-conductor spacer bar for interphase spacing, belonging to the technical field of overhead line transmission power. Background technique [0002] With the frequent occurrence of extreme weather, 500kV compact lines have frequently tripped due to galloping in recent years, which seriously threatens the safe operation of the power grid. Installing phase-to-phase spacers between conductors is an effective measure to control line galloping. Through mutual containment between conductors, the purpose of destroying the stable vibration of conductors is achieved. The interphase spacer bar of the background art uses a six-split sub-conductor spacer bar, which includes an interphase spacer bar body and a bracket, and one end of the bracket is connected to the interphase spacer bar, and the other end is connected to the sub-wire spacer bar body. The interphase spacer is ins...

AI Technical Summary

Problems solved by technology

Therefore, the sub-conductor spacers installed with interphase spacers will frequently apply alternating / impact mechanical loads to the overhead line conductors. In areas where galloping occurs frequently, even if interphase spacers are installed to prevent overhead line galloping, sub-conductor spacers Continuous and frequent application of alternating / impact mechanical loads to the wires will cause fatigue damage or broken strands of the wires of the overhead line, and in severe cases, the wires will even break and fall to the ground, endangering the safe and reliable operation of the power grid

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