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At present, there is a lack of effective liquid repair materials for ablation defects in the buffer layer of high-voltage cables, resulting in the inability to timely and effectively eliminate the hidden dangers of ablation defects in high-voltage cable lines. In this paper, acrylic based buffer layer ablation defect liquid repair materials were prepared and repair experiments were conducted on actual ablation defects in cable buffer layer. The repair effect of carbon black content in repair solution on the electrical properties of the buffer layer was studied. The results show that when the mass fraction of carbon black in the repair solution coating is 20%, the volume resistivity of the repaired buffer layer decreases to the level of new buffer layer and basiclly remains unchange with temperature. Based on the characterization of micro morphology, it is analyzed that the repair solution forms a carbon black coating on the fiber surface of the buffer layer, covering the original uneven coating and non-conductive particles. At the same time, the continuous water blocking powder layer formed by ablation on the inner side of the non-woven fabric is repacked by the carbon black coating, rebuilding the electrical connection of the buffer layer, thus effectively repairs the erosion defects of the buffer layer.
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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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