中文摘要：

覆冰下绝缘子电气性能将降低,国内外对覆冰机理和覆冰闪络特性开展了大量研究,但对支柱绝缘子的覆冰电气特性及防冰闪措施研究相对较少,为此,开展了110kV支柱绝缘子交流覆冰（雪）闪络特性试验研究,比较了加装增爬裙和涂PRTV涂料的防冰效果,分析了覆冰质量m和厚度d对110kV支柱绝缘子覆冰闪络特性的影响,得到了m与d的等价性关系,提出了提高110kV支柱绝缘子冰闪电压的措施。研究结果表明,加装增爬裙可以提高支柱绝缘子冰闪电压约50%,PRTV涂料不具有防冰效果,对于普通支柱绝缘子m和d满足m=4.7lnd-8.8。研究结果可为覆冰地区输电线路外绝缘的选择和设计提供参考。

英文摘要：

We studied the AC electric characteristics of 110 kV post insulators covered with ice or snow, compared the anti-flashover function of adding creepage extenders and permanent-room-temperature-vulcanized anti-contamination flashover composite coating（PRTV）, analyzed the influence of weight and thickness of ice on icing flashover performance of 110 kV post insulators covered with ice, and put forward the equivalent relation between them according to the equivalent principle to the flashover voltage of iced-covered composite insulators and the measures of improving the icing flashover voltage of 110 kV post insulator. The tests show that the flashover voltage can increase fifty percent for the post insulator of adding creepage extenders, there is no positive effect of PRTV on severe icing process. Compared with the post insulator string which is not coated with PRTV, the relation between rn and d is m= 4.71nd-8.8. The results can offer some consult for the external insulation selection and design of transmission lines at ice region.