Calculating Algorithm for Torsional Stiffness of Conductors-Spacers

In galloping of transmission lines, the twist of bundled conductors plays an important role. So the research of torsional stiffness of conductors-spacers for in-depth study of the galloping of the transmission lines is important.In addition to considering the impact of previous studies involving some of the torsional stiffness of bundled conductors factors (such as the torsional stiffness of sub conductor, the actual tension, etc.), but also the effects of sag and line height difference are considered. Finally a theoretical torsional stiffness of conductors-spacers formula is deduced. With the previous formula and the measured data on the different conductor types, different sub conductor spacing and different initial tension conditions, theresults of this formula are closer to the measured data.