On the basis of the summary of extensive literatures and combined with the climate and micro-topography of Hunan province

this paper analyses the formation factors

mechanism and prevention measures of transmission lines galloping caused by ice coating in Hunan province. By summarizing the historical data

the influence of climate and micro-topography and other factors on transmission line galloping of Hunan province. Firstly

in according with the topography and weather conditions that can easily cause galloping

measures of avoiding galloping like reasonable choice of the line alignments and directions are proposed; then measures of controlling gallop are found by improving electrical and mechanical strength without changing the galloping conditions; finally

galloping restraint measures by installing anti-galloping device on the conductors to change galloping conditions are proposed. At last

this paper concludes the relationships between galloping and grid structure（ like the line types and alignments）

put forward the forecasting techniques of galloping

and provides early warning to the power grid in advance to take ice melting and de-icing measures to further reduce the hazards of galloping.