The damage of composite insulator sheds will reduce the creepage distance

and uneven distribution of damage will lead to electric field distortion

both of which will affect the flashover performance of insulators. Consequently

the pollution flashover performance of 35 kV composite insulators under different sheds damage are studied experimentally.The results show that

as the damage radius increases

the pollution flashover voltage drop of composite insulators increases

and the pollution flashover voltage of damage radius 7 mm

13.4 mm

and 28 mm

compared to intact insulator

is decreased by 13.68%

15.66%

and 23.59%; The pollution flashover voltage drop under the same damage radius decreases with the position angle increases

and the pollution flashover voltage of position angle 0°

90° and 180° can be decreased by 13.68%

9.53% and 4.05% compared to intact insulator; As the intermittent damage number increases

the pollution flashover voltage drop under the same damage area decreases

compared to intact insulator

the pollution flashover voltage of 1

2

3 and 4 damage are decreased by 13.68%

10.43%

6.21%

and 3.39%

respectively.