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In order to study the influence of different interface pressure on the electric field distortion of the composite interface of crosslinked polyethylene/silicon rubber (XLPE/SR) insulation in the cold shrinkable cable intermediate joint, a simulation model of 35 kV cold shrinkable cable intermediate joint was established by the finite element simulation software. The electric-thermal-force field of the composite interface without defects and with metal impurities, circumferential scratches, and longitudinal scratches was simulated and calculated. The results show that the interface pressure has different effects on the joint deformation and electric field strength distortion under different conditions. The joint deformation with longitudinal scratch is more significant, and the field strength distribution at the defect is more obviously affected by the interface pressure. The field strength of the shielding tube is inversely proportional to the interface pressure, and the field strength of the stress cone in the joint with longitudinal scratches is directly proportional to the interface pressure. The overall field strength of the insulation composite interface except for the defects decreases with the increase of the interface pressure.
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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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