特高压同塔双回交流线路的外绝缘特性.pdfVIP

35 7 Vol. 35 No. 7 # 1526 # 2009 7 31 High Voltage Engineering J ly 31, 2009 焦保利, 霍 锋, 陈 勇, 万启发, 徐 涛, 谷定燮, 孟 刚 ( 国网电力科学研究院, 武汉430074) : , 1 1000 kV , ; , , 1000 kV , , : ; ; ; ; ; ; ; : T M855; TM853 : A : 1003-6520( 2009) 07- 1526-07 External Insulation Characteristic for UHVAC Transmission Line with Double-circuit on the Same Tower JIAO Bao-li, HU O Feng, CHEN Yong, WAN Q-i fa, XU Tao, GU Ding-xie, MEN G Gang ( State Grid Electric Pow er Research Instit te, W han 430074, China) Abstract: Proper external ins lation design is an important factor for safe r nning of pow er transmission line, so, in order to ens re the ins lat ion strength and opt imize the tow er design of the first UH VAC t ransmission line w ith two circ its on the same tower in China , the external ins lation characteristic of the tow er gap and the wit hstand voltage characteristic of long poll ted ins lator strings w ere investigated. T he power freq ency voltage, different w ave-front sw itching imp lse volt age and lightning imp lse voltage flashover were tested by real tow er method. On the basis of the UH VAC t ransmission line, and the w ithstand voltage w as t ested on the long poll t ed ins lator at the poll tion test hall. Several important air gap flashover characteristic c rves and w ithstand voltage characteristic c rves of pol- l t ed ins lators were got ten. According to the test res lts and the overvoltage sim lation concl sion, the ins lation co-ordination problem of the line was analyzed, and the minim m safe ins lation air gap and ins lator config ration were determined, w hich has been sed as the base for the design of this power transmission project