Research On Optimal Spacer Placement Technology Of Suppressing Subspan Oscillation Of Bundle Conductor

As an important part of power grid, the safe operation of transmission line is related to the development of national economic. With the improvement of voltage level, bundle conductor is widely accepted in the ultra-high voltage and ultra-high voltage transmission line because of its superior performance such as inhibition of corona and reactance. However, subspan oscillation is a special wind-induced vibration type of bundled conductor, it can easily eaused amage of the bundle conductor and fittings.Therefore, it need to in-depth study in suppression technology of subspan oscillation of on the technology to ensure the safe operation of the transmission line.This paper do a series of studies on subspan oscillation.Analyze its incentive of subspan oscillation from its essence. Taking the220kV Li-hai line in the Yunnan Power Grid which has occured subspan oscillation as research objects, building the computational fluid dynamic(CFD) model based on ADINA, finishing the CFD numerical simulation, studying effect of ertical spacing, horizontal spacing and wind speed on the average aerodynamic characteristics of leeward conductors.Then, analyzing the influence factors of subspan oscillation based on investigate and survey and CFD numerical simulation.In view of the widely used protective measures that suppressing subspan oscillation by placing spacer, based on the previous experience and rules, presents a calculation method of optimal spacer placement which can suppress subspan oscillation and meet the requirement of engineering design, determine the objective function and constraint conditions of optimal spacer placement, the penalty function outside point method is adopted to optimization calculation. Writing the calculation program of optimal spacer placement based on matlab software platform. Finally, compiling and packaging the M. file of optimization program into an exe. File based on Graphical User interface(GUI), developing a software for optimal spacer placement. It provides the operation interface, through inputing parameters can quickly get the optimal value of each subspan, provideing great convenience to the calculation of optimal spacer placement.