Research on bird droppings flashover of 110kV transmission line composite insulator insulation-coated grading ring

In order to reduce the probability of bird manure flashover caused by the dropping of bird manure on composite insulators of transmission lines and ensure the safe operation of overhead transmission lines, it is necessary to conduct insulation treatment on the voltage sharing ring of suspended composite insulators in operation. In order to improve the insulation level between the composite insulator and the tower and reduce the probability of bird manure flashover. Using COMSOL finite element simulation software, a three-dimensional simulation model of the electric field of the insulation blanket equalization ring of the composite insulator is established. The change of the spatial electric field distribution of the insulation blanket equalization ring under the condition of simulated bird dung is studied. The difference between the insulation blanket equalization ring and the ordinary equalization ring when the bird dung and the conductor are coplanar and heterogeneous is studied. At the same time, the influence of the insulation blanket material and thickness on the spatial electric field of the composite insulator is studied. The research results can provide certain reference for composite insulators to suppress bird manure flashover.