高电压技术2013，Vol.39Issue(6)：1382-1389,8.DOI:10.3969/j.issn.1003-6520.2013.06.014
高海拔特高压并联绝缘子的直流污闪特性
DC Pollution Flashover Performance of Ultra High Voltage Parallel Double Insulators in High Altitude Area
摘要
Abstract
To guide operation and maintenance for established ±800 kV ultra-high voltage direct current(UHVDC)transmission lines,and to provide references for external insulation design of future UHVDC projects,we studied the pollution flashover performance of parallel double insulator strings (Ⅱ strings) in high-altitude areas.Tests were performed on samples of XZP-300 porcelain insulators and "one major,one middle and four minor sheds" shaped composite insulators.The probability distribution of flashover voltages under artificial contamination test was explored.Moreover,the difference between flashover voltages of Ⅱ strings and single Ⅰ strings was analyzed,and the influence of spacing on the flashover voltage of Ⅱ strings was investigated.The results showed that the flashover voltages of Ⅱ strings and Ⅰ strings installed by up-and-down method in high-altitude areas were distributed normally.When the equal salt density varied from 0.03 to 0.2 mg/cm2,the one-unit flashover voltages of porcelain Ⅱ strings and porcelain single Ⅰ string varied from 19.6 to 5.8 kV and from 20.5 to 6.9 kV,respectively.When the equal salt densities varied from 0.05 to 0.2 mg/cm2,the per-meter flashover voltage of porcelain Ⅱ strings and porcelain single Ⅰ string varied from 105.6 to 38.7 kV and from 109.9 kV to 43.1 kV,respectively.When the spacing exceeded 20 cm,further enlarging spacing had no significant effect on the flashover voltage of Ⅱ strings.关键词
绝缘子/人工污闪试验/污闪特性/悬挂方式/标准偏差/直流/高海拔Key words
insulators/ artificial contamination test/ pollution flashover performance/ suspension patterns/ standard deviation/ DC/ high altitude引用本文复制引用
宋磊,张福增,梁曦东,廖一帆,李锐海..高海拔特高压并联绝缘子的直流污闪特性[J].高电压技术,2013,39(6):1382-1389,8.基金项目
国家重点基础研究发展计划(973计划)(2011CB209406) （973计划）
特高压工程技术(昆明、广州)国家工程实验室开放基金(NEL201202) （昆明、广州）
Project supported by National Basic Research Program of China(973 Program) (2011CB209406),National Engineering Laboratory for Ultra High Voltage Engineering Technology (Kunming,Guangzhou) (NEL201202). （973 Program）
