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Aimed at a new type of three-element mixed insulating oil, we developed a mixed insulating oil transformer with high overload capacity. On the basis of the analysis on the heat resistance grade and temperature rise limit of the mixed insulating oil transformer and mineral insulating oil transformer, the temperature rise of insulating oil distribution transformer with different overload capacity was compared combined with the relevant calculation and test detection of the model machine. Some structural optimization suggestions of mixed insulating oil distribution transformer were proposed and the cost was compared. The results show that the overload capacity of oil-immersed distribution transformer can increase from 1.5 times to 1.75 times by using the hybrid insulation system composed of a new type of high temperature resistant ternary mixed insulating oil and DPE insulating paper or Nomex T910 insulating paper, and the corresponding cost increases less than 8%, which has strong practicability and economy.
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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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