110~220kV“三跨”悬垂双串的联塔形式  

Study on Connection Tower Type of 110~220 kV“Three-span”Suspension Double Strings

作　　者：王星涵 王晓涵 郑斌 张学凯 王茂成 WANG Xinghan;WANG Xiaohan;ZHENG Bin;ZHANG Xuekai;WANG Maocheng(State Grid Shandong Electric Power Company Longkou Power Supply Company,Longkou,Shandong 265700,China;State Grid Shandong Electric Power Company Yantai Power Supply Company,Yantai,Shandong 264000,China;State Grid Shandong Electric Power Company,Jinan,Shandong 250000,China;Yantai Dongyuan Electric Power Design Co.,Ltd.,Yantai,Shandong 264000,China)

机构地区：[1]国网山东省电力公司龙口市供电公司,山东龙口265700 [2]国网山东省电力公司烟台供电公司,山东烟台264000 [3]国网山东省电力公司,山东济南250000 [4]烟台东源电力设计有限公司,山东烟台264000

出　　处：《山西电力》2024年第3期26-29,共4页Shanxi Electric Power

基　　金：2022年国网山东省电力公司“揭榜挂帅”职工技术创新联盟专业重大攻关项目。

摘　　要：为了使悬垂双串更加安全可靠运行,以220kV双分裂导线悬垂双串为例,首次提出了辅以长、短联塔备份串的“三挂点”的设计理念,即联塔中心串两侧的长、短联塔备份串设计为“松弛连接”,在正常工况下不受力,仅有联塔中心串受力,实现双悬垂串的“双联单固定”,确保双串受力均衡;当联塔中心串断联后,两侧长、短联塔备份串才受力,实现“双联双固定”,从而解决了传统“双联双固定”和“双联单固定”的设计缺陷,确保导线悬垂双串不发生掉串事故。为了消除直线塔相邻档高差大所产生的两联长度差值现象,两侧长、短联塔备份串的串长应实施差异化设计。In order to make the suspension double strings run more safely and reliably,taking the 220 kV double split wire suspension double strings as an example,the design concept of“three suspension points”supplemented by long and short tower backup strings is put forward for the first time,that is,the long and short backup strings on both sides of the center string of the tower are designed as“loose connection”.Under normal operating conditions,there is no stress and only the center string of the tower is stressed to achieve the“double connection,single fixation”of the double suspension strings to ensure that the stress on both strings is balanced;when the center of the tower is disconnected,both sides of the long and short tower backup strings are stressed to achieve“double connection,double fixation”,thus the design defects of the traditional“double connection,double fixation”and“double connection,single fixation”are solved,ensuring that the suspension double strings of wires do not fall off.In order to eliminate the phenomenon of the difference between the two lengths caused by the large height difference between the adjacent brackets of the vertical tower,the string length of long and short tower backup strings on both sides should be differently designed.

关 键 词：三跨 悬垂双串 单挂点 双挂点 三挂点 联塔中心串 联塔备份串 差异化设计 

分 类 号：TM621.2[电气工程—电力系统及自动化]