Reseaarch On Galloping And Anti-galloping Technique For UHV Transmission Lines

Galloping is a low frequency(about 0.1 ~ 3 Hz),large amplitude(about 5 ~ 300 times the diameter of the wire)self-excited vibration of non-uniform ice transmission line,which is under the action of wind.At present,the UHV power grid is in the period of the rapid development.At the same time,galloping of line has higher frequency and greater harm in the reason of rapid development of power grid and the high frequency of the bad weather.Galloping endanger the safe operation of the transmission line greatly,ranging from wire whip attack,burns,broken stocks,etc.,will cause severe break down the tower,line tripped,cause blackouts,bring significant economic losses to society.This article has carried on the following experiment and simulation research on galloping characteristic and anti-galloping technique for UHV transmission lines:Install mock ice for UHV transmission line,incent it,and let it gallop under the natural wind excitation,observe and analyze the galloping characteristics.Introduce a new anti-galloping device phase to ground spacer and carry on test research with real overhead transmission line,verify the effectiveness and applicability of the device and contrast the influence of different pre-tightening force and different installation,try to make the phase to ground spacer work better for anti-galloping.Carry on the simulation calculation for UHV transmission line and phase to ground spacer with the existing finite element analysis software,the simulation process is based on the actual parameters and working conditions.Simulate the form of galloping and the galloping characteristics when the spacer is installed or not and the influence of different pre-tightening force and different installation.Evaluate the effectiveness of the device and how can it work better for the line with test and simulation result.