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Regarding the internal carbonization creepage defect of composite insulator, a finite element model of electromagnetic and thermal coupling calculation for FXBW-500 large-small-small shed type composite insulator was established, and the influencing laws of defect location and surface pollution on the temperature rise caused by internal carbonization creepage defect in core rod were analyzed. The results show that when there is a local carbonization creepage defect at different positions of composite insulators, the local temperature rise from high to low is high voltage end, low voltage end, and middle end. When there is pollution, the temperature distribution of the carbonization creepage defective insulator does not change significantly, but the maximum temperature rise values of each part all increase significantly, among which the maximum temperature rise of high voltage end increases from 9.3℃ to 18.2℃, and the temperature rise along the surface increases from 2.52℃ to 4.94℃. Although the existence of pollution makes the overall temperature of the insulator rise, it still does not conceal the temperature jump at the defect location. Therefore, when the location of carbonization creepage defects are identified through temperature, the temperature jump can be taken as a reference.
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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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