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（華北電力大學(xué)機(jī)械工程系， 保定 071003）

［摘要］為探究高電壓等級(jí)設(shè)計(jì)標(biāo)準(zhǔn)以及各自設(shè)計(jì)標(biāo)準(zhǔn)下超、特高壓交直流同塔多回線路桿塔構(gòu)件的可靠度水平，依照現(xiàn)行規(guī)范GB 50545—2010及規(guī)范GB 50790—2013，采用一次二階矩方法（FOSM）對(duì)河西走廊即將實(shí)施的±800kV/750kV交直流同塔多回線路桿塔進(jìn)行了詳細(xì)的可靠度計(jì)算。分析結(jié)果表明：大風(fēng)工況下±800kV設(shè)計(jì)標(biāo)準(zhǔn)時(shí)的構(gòu)件可靠度指標(biāo)均值為3-588；各自設(shè)計(jì)標(biāo)準(zhǔn)下的構(gòu)件可靠度指標(biāo)均值為3-341；Q345類型鋼材的構(gòu)件可靠度指標(biāo)略高于Q420鋼材構(gòu)件；同一類型鋼材下的厚度等級(jí)對(duì)構(gòu)件的可靠度指標(biāo)有明顯影響。

［關(guān)鍵詞］超、特高壓； 交直流同塔； 可靠度指標(biāo)； 設(shè)計(jì)標(biāo)準(zhǔn)

中圖分類號(hào)：TU323-4文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：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