中文摘要：

为给直流线路复合绝缘子的选型和人工污秽试验标准的制定提供参考,以伞裙结构为一大一小的复合绝缘子和相同配方的硅橡胶试片为试品,试验研究了环境温度对复合绝缘子的直流污闪电压的影响。研究结果表明,硅橡胶试片表面污秽水珠浸润区域的平均直径随着迁移时间的增长和温度的升高而逐渐减小,且近似符合线性关系;环境温度对复合绝缘子直流污闪电压的影响分为憎水性迁移的影响和雾室内外温差的影响两个方面,雾室内外温差对复合绝缘子的直流污闪电压的影响大于憎水性迁移对直流污闪电压的影响,但二者差别不大,均在0.92%/°C~1.25%°/C之间;该两个方面对复合绝缘子的人工污秽试验结果的共同影响较大,应在环境温度为15°C和25°C之间进行人工污秽试验。

英文摘要：

In order to provide the reference for the selection of the composite insulator and the experimental standard for the artificial pollution test,we investigated the influence of the environmental temperature on the flashover voltage of the composite insulator.The composite insulator with the alternating large and small shed design and the high temperature vulcanization silicon rubber specimen were used.Experimental results indicate that the diameter of the water wet area decreases with the increase of the migration time or the environmental temperature.The influence of the environmental temperature on flashover voltage is composed of the influence of the migration of the hydrophobicity and the influence of the different temperature out and in the fog chamber.The influence of the different temperature out and in the fog chamber on flashover voltage is slightly more remarkable（between 0.92%/（°C）~ 1.25%/（°C）） than that of the migration of the hydrophobicity.The artificial pollution test should be carried out with the environmental temperature between 15（°C） and 25（°C）,because that the two factors have a remarkable effect on the flashover voltage of composite insulator.