Abstract:

Though the rotary clamp conductor spacer-dampers have been widely used in extra high voltage （EHV） and ultra high voltage （UHV） transmission lines, the anti-galloping effect of this kind of spacer still needs to be studied. According to the design and parameters of spacer-damper, the anti-galloping mechanism of the spacer had been researched and verified. Since part of the rotary clamp conductor spacer-damper can rotate, so that the sub-conductor can rotate around its own axis, therefore the cross-section of iced conductor becomes uniform, which plays a role of galloping inhibition. Moreover, a three-dimensional finite element model of the conductor spacer system was established by means of ANSYS software. Based on the modal analysis of the conductor spacer-damper system, the natural frequencies and their vibration mode graph of the first 6 modes of this conductor spacer-damper system were obtained. According to the analysis of the natural frequencies and vibration types, it shows that the rotary clamp space-damper has a better effect on anti-galloping. On this basis, a suggestion for engineering application of this rotary clamp conductor spacer-damper was proposed.

Key words: transmission line, bundled conductors, rotary clamp conductor spacer-damper, anti-galloping mechanism, anti-galloping effect