中文摘要：

以750kV超高压交流、1000kV特高压交流输电线路工程为背景,介绍了线路悬式复合绝缘子伞裙结构的优化设计。在对14种不同伞裙结构的复合绝缘子试品进行人工污秽闪络试验的基础上,结合前期得到的对复合绝缘子伞裙积污特性仿真分析计算结果,优化选择了悬式复合绝缘子的伞裙结构,以使它们具有较优的综合性能。人工污秽试验及计算机仿真分析的结果表明,使用优化后的伞裙结构,可使线路悬式复合绝缘子同时具有较高的污闪电压、较优的积污特性以及较好的工程应用经济性。研究结果可为750kV超高压交流、1000kV特高压交流输电工程外绝缘的设计和绝缘子的选型提供理论依据。

英文摘要：

The external insulation is one of the most important technological issues in the construction of UHVAC transmission projects. We mainly studied the optimal design of composite insulators＇ shed. Using the results of artificial contamination test for 14 composite insulators with different profiles as well as the results of simulation analysis on the contamination depositing characteristics of composite insulator, we optimized the profiles of the composite insulators in order to improve overall performance of the composite insulators. Thereafter, flashover voltages of composite insulators can be enhanced greatly, and the composite insulators have better contamination depositing characteristics. Therefore, the dimension of towers will he decreased and the cost of transmission systems will be reduced, especially in heavy pollution areas. Accordingly, this work can provide theoretical support of the external insulation design and the selection of insulators for 750 kV EHV AC, 1000 kV UHV AC transmission projects.