新型导线在厦门220kV跨海通道增容改造中的应用

针对厦门钟山-东渡220kV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、殷钢芯耐热铝合金绞线及普通钢芯耐热铝合金导线的性能特点,对比分析此3种导线性能参数,重点比较了弧垂和经济性,最后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要求下,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绞线作为大跨越段增容改造导线。

Application of New Conductor in Xiamen 220 kV Sea Crossing Line Capacity Upgrade Project

Aiming at the 220 kV Zhongshan-Dongdu sea-crossing line in Xiamen,the necessity of line capacity upgrade is analyzed.In conductor selection for normal sections,performance features of gap -type heat resistant aluminum alloy conductor,TACIR/AS,and common heat resistant aluminum alloy conductor steel core are introduced and compared,especially in sag and economy.And gap-type thermal resistant aluminum alloy conductor is chosen to replace the normal sections.In large span section,to prevent conductor sag from ...