Conductor galloping is a common phenomenon in transmission line operation

which can lead to electrical and mechanical accidents. In order to reduce the harm caused by conductor galloping

it is necessary to study the key factor of aerodynamic parameters. Firstly

the aerodynamic parameters of crescent and D-shaped typical iced conductors were obtained by wind tunnel test. Then

the effects of wind speed

ice thickness

conductor type

bundle spacing and splitting number on wire aerodynamic coefficients were analyzed. Finally

the critical galloping wind speed and galloping situation of a 500 kV four-bundle conductor were calculated and simulated using the parameters obtained from the wind tunnel test.The experimental results show that the simulation results are in good agreement with the actual situation. The aerodynamic coefficients of conductors increase first and then decrease with the increase of wind speed. With the increase of icing thickness

peaks on crescent-shaped iced conductors appear near the angle of attack at 20 degrees

and the lift coefficients of D-shaped conductors show an obvious upward trend at 100～170 degrees. Besides

the conductor type

bundle spacing

and splitting number have important effects on aerodynamic parameters. The results are of guiding significance to the prediction of galloping amplitude and the application of anti-galloping technology of ice-covered quad bundle condutor under different meteorological conditions in practical engineering.