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Bird damage is an important factor affecting the safe operation of transmission lines. In order to quantitatively analyze the spatial electric field distribution of bird droppings near insulators, we carried out simulation and calculation on the bird droppings flashover of 110 kV composite insulators, and studied the influence of different factors on the electric field. The results show that the longer the continuous channel of bird droppings, and the closer it is to the insulator, the more probable that flashover occurs. The existence of grading ring shortens the distance between the high and low voltage ends, which will increase the flashover probability; the dropping path of bird droppings has a great influence on the flashover probability, and the flashover probability is the lowest when the bird dropping is on the different surface of the transmission line. Finally, combined with the simulation results, new protection range of bird droppings is proposed to give some advice for protecting transmission line from bird damage.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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