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In order to study the surface potential and electric field variation law of porcelain insulators under suspended sand and dust weather, a simulation model of xp-70 ceramic suspension insulator was established on the basis of electrostatic field model of finite element method, and the potential and electric field distribution law of porcelain insulators in various suspended sand and dust environments was summarized on the basis of finite element software calculation. The results show that the electrically neutral sand particles in the air can cause small distortion of the surface potential and electric field of porcelain insulator. When the sand and dust around the insulator are all positively charged, the surface potential will increase, and the surface electric field will decrease near the high voltage end and will increase near the low voltage end. When the sand and dust around the insulator are all negatively charged, the surface potential will decrease as a whole, the surface electric field will increase near the high voltage side of insulator string and will decrease near the low voltage side, and its distortion amplitude is proportional to the absolute value of dust particle size, concentration, and charge-mass ratio. When the insulator is in a mixed sand and dust environment of half charged and half electro-neutral, its surface potential and electric field will be distorted, and its distortion amplitude is less than that when the entire sand and dust are charged, and greater than that of the insulator alone in the sand and dust environment. When the insulator is in a "positive and negative" sand and dust environment, the distortion amplitude of surface potential and electric field is similar to the distortion amplitude in the electro-neutral sand and dust environment.
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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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