本文選題：傘形結構　切入點：復合支柱絕緣子　出處：《電網(wǎng)技術》2014年10期 　論文類型：期刊論文

【摘要】：為研究高海拔地區(qū)傘形結構對復合支柱絕緣子直流污閃特性的影響規(guī)律,對4種不同傘形結構的6支復合支柱絕緣子和1支無傘裙結構的復合支柱絕緣子在昆明特高壓國家工程實驗室進行了大量的直流人工污穢試驗,分析了各類試品的爬距有效系數(shù),用紫外放電成像儀對各類試品的局部放電現(xiàn)象進行觀測,統(tǒng)計了紫外放電光子數(shù),同時利用高速攝像機觀察了不同傘形結構試品沿面電弧的發(fā)展情況,并分析了一大一中4小傘形復合支柱絕緣子傘裙參數(shù)對直流污閃電壓的影響,結果表明:一大兩小傘形是4種傘形中最優(yōu)的傘形結構,該傘形試品的直流污閃電壓和爬距有效系數(shù)均最高,等徑傘傘形最差;各類試品的爬距有效系數(shù)隨著鹽密的增大而有所增加;等徑傘傘形試品的紫外局部放電現(xiàn)象嚴重,電弧橋接現(xiàn)象最明顯,導致爬距利用率最低,而大小傘交替?zhèn)阈尾粌H紫外局部放電現(xiàn)象較弱,還能較好抑制電弧橋接現(xiàn)象,有效提高爬距利用率;建議在高海拔地區(qū)一大一中4小傘形復合支柱絕緣子的爬電系數(shù)取3.5左右,相鄰傘間距不小于35 mm,但由于一大一中4小傘形相鄰傘裙電弧橋接現(xiàn)象嚴重,即使改變傘裙參數(shù)也不能有效提高其直流污閃電壓,因此,該傘形不如一大兩小傘形。
[Abstract]:In order to study the influence of umbrella structure on DC pollution flashover characteristics of composite pillar insulators in high altitude area, A large number of direct current artificial contamination tests were carried out in Kunming UHV National Engineering Laboratory for 6 composite prop insulators with four different umbrella-shaped structures and one composite prop insulator with no umbrella skirt structure. The effective coefficient of crawling distance of all kinds of samples is analyzed. The partial discharge phenomena of various samples are observed by ultraviolet discharge imager, and the number of photons of ultraviolet discharge is counted. At the same time, the development of arcs along different umbrella structures is observed by using a high-speed camera, and the influence of the parameters of umbrella skirt on DC pollution flashover voltage is analyzed. The results show that one large and two small umbels are the best umbrella-shaped structures among the four kinds of umbels. The DC flashover voltage and the effective coefficient of climbing distance of the umbrella are the highest and the umbrellas with equal diameter are the worst. The effective coefficient of climbing distance increased with the increase of salt density, the phenomenon of ultraviolet partial discharge was serious, the phenomenon of arc bridge was the most obvious, which resulted in the lowest utilization rate of climbing distance. However, the Umbrella is not only weak in ultraviolet partial discharge, but also can restrain the arc bridging phenomenon and improve the utilization ratio of climbing distance. It is suggested that the creeping coefficient of insulators with a large, one medium and four small umbrella-shaped pillars should be about 3.5 at high altitude. The distance between the adjacent umbrellas is not less than 35mm, but the arc bridging phenomenon of the adjacent umbrella skirt is serious, even if the parameters of the umbrella skirt are changed, the DC pollution flashover voltage can not be effectively increased, so the umbrella shape is not as good as one large and two small umbrellas.
【作者單位】： 華南理工大學電力學院;南方電網(wǎng)科學研究院有限責任公司;
【基金】：the Projects of National Natural Science Foundation Program (51177052) the National Engineering Laboratory (Kunming) of UHV Engineering Technology foundation (NEL201306) the Fundamental Research Funds of the central universities (2013ZM0035) for financial support
【分類號】：TM216

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