金具对大截面导线握力的影响因素  

Influence Factors of Fitting on Grip Strength of Large Cross-section Conductor

作　　者：万建成[1] 刘胜春[1] 刘臻[1] 孙宝东[1] 牛海军[1] 

机构地区：[1]中国电力科学研究院,北京市102401

出　　处：《电力建设》2012年第6期84-88,共5页Electric Power Construction

基　　金：国家电网公司科技项目(SGKJJSKF[2008]480号)

摘　　要：锦屏—苏南±800kV特高压直流线路采用了液压式接续金具和耐张线夹,金具的握力应不小于95%RTS。900mm2大截面钢芯铝绞线是4层铝股结构,而且JL/G3A-900/40导线铝钢比较大。研究了金具对大截面导线握力的影响因素,结果表明压接造成的单线强度损失是客观存在的,导线的铝钢比、单线强度是影响金具握力的主要因素。Jinping-Sunan ＋ 800 kV UHV DC line uses hydraulic splicing fitting and strain clamp, and the grip strength of fitting should be more than 95 % RTS. Because 900 mm2 large cross-sections ACSR was 4-layer aluminum stranded structure, especially the aluminum/steel ratio of JL/G3A- 900/40 conductor was larger, this paper mainly studied the influence factors of fitting on the grip strength of large cross-section conductor. The result shows that there is a wire strength loss caused by crimping, which is the main influence factor, as well as aluminum/steel ratio.

关 键 词：900mm2大截面导线 压接保留率 单线强度 铝钢比 

分 类 号：TM75[电气工程—电力系统及自动化]