摘要
针对厦门钟山-东渡220 kV跨海通道,分析了线路增容改造的必要性。在普通段导线的选择时,介绍了间隙型耐热铝合金导线、超强钢芯高强耐热铝合金绞线及普通钢芯耐热铝合金导线的性能特点,通过对比分析此3种导线性能参数,重点比较了弧垂和经济性,提出选择间隙型耐热铝合金导线作为普通段的更换导线。在大跨越段导线的选择时,在保证导线增容改造后弧垂不增加,通过载流量和经济性的比较分析,选择超强钢芯高强耐热铝合金导线作为大跨越段增容改造导线。
Aiming at the situation of Xiamen 220kV Zhongshan - Dongdu trans - straits passage, the paper analyzes the necessity of transmission line upgrading. In the course of choosing conductor in the simple section, the paper introduces the characteristic of clearance type heat - resistant aluminum alloy conductor, super strong steel - core high - strengthen heat - resistance aluminum alloy stranded wire and simple steel - core heat - resistant aluminum alloy conductor, after comparing with the performance of above - mentioned three types conductor, and especially comparing the sag and economies, the clearance type heat - resistant aluminum alloy conductor has been chosen to replacing the simple section conductor. Whereas in the course of choosing the conductor in large crossing section, through comparing and analyzing the current - carrying capacity and electrics, the super strong steel - core high - strengthen heat - resistance aluminum alloy stranded wire should be chosen in upgrading course in order to ensure the invariability of sag after upgrading.
出处
《青海电力》
2008年第B12期69-73,共5页
Qinghai Electric Power
关键词
间隙型
耐热
大容量
导线
架空线路
增容改造
clearance type
heat - resistance
high capacity
conductor
overhead lines
upgrading
