耐张串对特高压孤立档计算方法的影响研究  

Study on Influence of Tension String on UHV Isolated Span Calculation Method

作　　者：吴伟康 晁晓艳 WU Wei-kang;CHAO Xiao-yan(East China Electric Power Design Institute Co.,Ltd.of CPECC,Shanghai 200001,China)

机构地区：[1]中国电力工程顾问集团华东电力设计院有限公司,上海200001

出　　处：《电力勘测设计》2021年第6期57-61,共5页Electric Power Survey & Design

摘　　要：特高压输电线路中,耐张绝缘子串较长、较重,会对孤立档导线的张力、弧垂计算产生重要影响。基于耐张串的组成特点,将其荷载等效为一系列作用在导线上的集中荷载,对孤立档导线耐张串荷载与导线张力、弧垂之间的关系进行分析。计算不同工况下耐张串对导线张力、弧垂的影响,通过与PLS结果对比,表明提出的计算方法是行之有效的,且可精确计算耐张串处的弧垂,为特高压孤立档输电线路的设计提供了新的思路。In UHV transmission lines,the long and heavy tension insulator strings will have a significant impact on the tension and sag calculation of isolated span conductors.Based on the compositional characteristics of the tension string,its load is equivalent to a series of concentrated loads acting on the conductor.The relationship between tension string load and conductor tension and sag is analyzed.The effects of tension strings on conductor tension and sag under different working conditions are calculated and compared with the results of PLS.It shows that the calculation method proposed in this paper is effective and the sag of the tension string can be accurately calculated,which provides a new idea for the design of UHV isolated transmission lines.

关 键 词：特高压 孤立档 耐张串 等效集中荷载 张力 弧垂 

分 类 号：TM751[电气工程—电力系统及自动化]