（华北电力大学机械工程系， 保定 071003）

［摘要］为探究高电压等级设计标准以及各自设计标准下超、特高压交直流同塔多回线路杆塔构件的可靠度水平，依照现行规范GB 50545—2010及规范GB 50790—2013，采用一次二阶矩方法（FOSM）对河西走廊即将实施的±800kV/750kV交直流同塔多回线路杆塔进行了详细的可靠度计算。分析结果表明：大风工况下±800kV设计标准时的构件可靠度指标均值为3-588；各自设计标准下的构件可靠度指标均值为3-341；Q345类型钢材的构件可靠度指标略高于Q420钢材构件；同一类型钢材下的厚度等级对构件的可靠度指标有明显影响。

［关键词］超、特高压； 交直流同塔； 可靠度指标； 设计标准

中图分类号：TU323-4文献标识码：A文章编号：1002-848X(2019)23-0107-06

Research on designing reliability of UHV/EHV AC and DC tower with multi-circuit lines

An Liqiang， Zhang Haiwei， Jiang Wenqiang

(Department of Mechanical Engineering, North China Electric Power University, Baoding 071003， China)

Abstract:To explore the members′ reliability of extra and ultra-high voltage AC and DC tower under high voltage grade design criterion and respective design criterion, the FOSM was used to analyze the reliability of ±800kV/750kV AC and DC tower with multi-circuit lines in Hexi Corridor according to current national code GB 50545—2010 and GB 50790—2013. The result indicates that the average reliability indexes of members are 3-588 under ±800kV design criterion and 3-341 under respective design criterion in wind load condition; the reliability index of members with  Q345 rolled steel is larger than that of members Q420 rolled steel; the rank of thickness of same rolled steel affects to the reliability indexe of members.

Keywords:UHV/EHV; AC and DC tower; reliability index; design criteria