文章(zhang)來源：國(guo)家電網公司 發布時間(jian)：2010-06-01
近日，國家電網西北750千伏骨干網架重點建設項目，750千伏蘭州東-平涼-乾縣輸變電工程成功投入運行，該工程是西北地區實施“西電東送”戰略的主通道，也是國內首次采用同桿雙回并架技術建設的電壓等級最高的輸變電線路，標志著西北750千伏送端電網已覆蓋陜西、甘肅、青海、寧夏4省（區），對于推動西北水、火、風電大規模“打捆”外送，帶動西北地區資源優勢向經濟優勢轉化，促進全國能源資源優化配置將發揮重要作用。
該工程(cheng)于(yu)2007年8月開(kai)工建設，包括新(xin)建750千(qian)(qian)伏陜西乾縣變(bian)電(dian)(dian)(dian)(dian)站(zhan)、甘(gan)肅平(ping)涼(liang)開(kai)關(guan)站(zhan)，擴建750千(qian)(qian)伏甘(gan)肅蘭(lan)(lan)州東(dong)變(bian)電(dian)(dian)(dian)(dian)站(zhan)，新(xin)增(zeng)變(bian)電(dian)(dian)(dian)(dian)容(rong)量(liang)210萬千(qian)(qian)伏安(an)；新(xin)建750千(qian)(qian)伏蘭(lan)(lan)州東(dong)－平(ping)涼(liang)－乾縣雙回線(xian)路(lu)，橫(heng)跨(kua)甘(gan)肅、寧夏、陜西3省（自治區(qu)）14個縣市，線(xian)路(lu)總(zong)長2×442公(gong)里，工程(cheng)動態總(zong)投資37.8億元。至此，國(guo)家(jia)電(dian)(dian)(dian)(dian)網(wang)公(gong)司已在(zai)西北地區(qu)建成750千(qian)(qian)伏變(bian)電(dian)(dian)(dian)(dian)站(zhan)10座，線(xian)路(lu)14條，總(zong)長度2080.19公(gong)里，目前在(zai)建750千(qian)(qian)伏工程(cheng)“24站(zhan)41線(xian)”，國(guo)家(jia)電(dian)(dian)(dian)(dian)網(wang)遠距離(li)、大(da)容(rong)量(liang)、高效(xiao)率、低損耗優化配置資源的能力不斷(duan)增(zeng)強。
工(gong)(gong)(gong)程建設過程中(zhong)，國家電(dian)網公(gong)司堅持統(tong)(tong)一(yi)項目組織協調、統(tong)(tong)一(yi)規劃和(he)(he)進度計劃、統(tong)(tong)一(yi)設計標準(zhun)、統(tong)(tong)一(yi)驗收(shou)和(he)(he)評(ping)定標準(zhun)、統(tong)(tong)一(yi)國產化方案和(he)(he)招標組織模(mo)式(shi)的“五統(tong)(tong)一(yi)”建設原(yuan)則，積極推行“兩型(xing)三新(xin)(xin)(xin)”（資(zi)源節(jie)(jie)約(yue)型(xing)、環(huan)(huan)境友好型(xing)、新(xin)(xin)(xin)技術、新(xin)(xin)(xin)材料、新(xin)(xin)(xin)工(gong)(gong)(gong)藝(yi)）建設理念，取得了顯(xian)著的社(she)會經濟效益(yi)。采(cai)用同塔雙回(hui)、緊湊(cou)型(xing)線(xian)路技術，減少線(xian)路走廊征地(di)75畝，降低(di)工(gong)(gong)(gong)程造(zao)價(jia)690余(yu)萬(wan)元(yuan)；采(cai)用擴徑導線(xian)技術，降低(di)電(dian)暈(yun)損失(shi)和(he)(he)可聽噪聲，有(you)效節(jie)(jie)約(yue)資(zi)源，改善周邊環(huan)(huan)境；采(cai)用聯合構架(jia)，提高構架(jia)受力性(xing)能，使電(dian)氣設備布置緊湊(cou)，與常(chang)規構架(jia)形式(shi)相比，節(jie)(jie)省鋼材15%和(he)(he)大量基礎(chu)混凝土(tu)；積極推廣基礎(chu)、鐵(tie)塔設計新(xin)(xin)(xin)技術，鐵(tie)塔采(cai)用Q420高強鋼新(xin)(xin)(xin)材料，節(jie)(jie)約(yue)塔材重量6400余(yu)噸，降低(di)工(gong)(gong)(gong)程造(zao)價(jia)約(yue)4500萬(wan)元(yuan)；施工(gong)(gong)(gong)完畢后及時恢復生態環(huan)(huan)境，鐵(tie)塔基礎(chu)回(hui)填時恢復地(di)表原(yuan)貌，山區施工(gong)(gong)(gong)時撒上草籽，保護植被(bei)，做到(dao)環(huan)(huan)境友好。