文章來源(yuan)：國(guo)家(jia)電網公司 發布時間：2010-05-31
5月25日18時，國家電(dian)網(wang)(wang)公司西北電(dian)網(wang)(wang)750千(qian)伏(fu)(fu)骨干網(wang)(wang)架(jia)的標志性工程(cheng)——750千(qian)伏(fu)(fu)蘭州東—平涼—乾縣輸(shu)變電(dian)工程(cheng)竣工投產，這是(shi)繼(ji)750千(qian)伏(fu)(fu)示范工程(cheng)之后又(you)一里程(cheng)碑(bei)工程(cheng)，也是(shi)國內第一個(ge)同(tong)塔雙回750千(qian)伏(fu)(fu)輸(shu)變電(dian)工程(cheng)。該工程(cheng)標志著(zhu)750千(qian)伏(fu)(fu)送(song)端(duan)電(dian)網(wang)(wang)已覆蓋陜西、甘肅、青海、寧夏四(si)省(sheng)（自治區），對于推進西北電(dian)力大規模外送(song)、促進全(quan)國能源(yuan)資源(yuan)優化(hua)配置將發揮重要作用(yong)。
750千(qian)(qian)(qian)伏蘭州東—平(ping)涼—乾(qian)縣(xian)輸(shu)變電(dian)(dian)工(gong)程自5月13日開始系(xi)(xi)統調(diao)試，完(wan)成了15個調(diao)試項目，對工(gong)程設計、施(shi)工(gong)、主要電(dian)(dian)氣設備安裝制造質量以及(ji)整個西北750千(qian)(qian)(qian)伏電(dian)(dian)網系(xi)(xi)統帶(dai)電(dian)(dian)等(deng)各(ge)個環節進行了考驗。系(xi)(xi)統調(diao)試期間，在西北電(dian)(dian)網西電(dian)(dian)東送潮流90萬(wan)千(qian)(qian)(qian)瓦情況下，從甘肅平(ping)涼向(xiang)陜西乾(qian)縣(xian)送電(dian)(dian)50多萬(wan)千(qian)(qian)(qian)瓦，體現了750千(qian)(qian)(qian)伏電(dian)(dian)網遠距離(li)送電(dian)(dian)的巨大優勢。
該工(gong)程自2007年8月15日開工(gong)建(jian)設(she)。包(bao)括(kuo)新建(jian)750千(qian)伏乾縣變(bian)(bian)電站，主變(bian)(bian)規(gui)劃容(rong)量(liang)3×210萬(wan)千(qian)伏安(an)、本期(qi)(qi)建(jian)設(she)1臺(tai)；750千(qian)伏出線(xian)遠期(qi)(qi)9回，本期(qi)(qi)2回；330千(qian)伏出線(xian)遠期(qi)(qi)13回，本期(qi)(qi)5回；新建(jian)甘肅平涼開關站，擴建(jian)750千(qian)伏甘肅蘭州(zhou)東變(bian)(bian)電站；新建(jian)750千(qian)伏蘭州(zhou)東—平涼—乾縣雙(shuang)(shuang)回線(xian)路，線(xian)路總長2×442千(qian)米(mi)，為國內首次采用同桿雙(shuang)(shuang)回并架技術(shu)電壓等(deng)級最高的輸(shu)變(bian)(bian)電線(xian)路。
750千伏(fu)蘭州東—平涼—乾(qian)縣輸變(bian)電(dian)工(gong)程(cheng)(cheng)是西(xi)(xi)北750千伏(fu)電(dian)網(wang)主(zhu)網(wang)架的核(he)心工(gong)程(cheng)(cheng)，也是陜(shan)西(xi)(xi)境內(nei)的第(di)一個750千伏(fu)電(dian)網(wang)項目(mu)，西(xi)(xi)北實(shi)施(shi)“西(xi)(xi)電(dian)東送”戰略(lve)的主(zhu)通道(dao)。工(gong)程(cheng)(cheng)對加強陜(shan)甘斷面潮流交換，確保陜(shan)西(xi)(xi)迎(ying)峰度夏期(qi)間可(ke)靠用(yong)電(dian)、保持西(xi)(xi)北電(dian)網(wang)系統穩定(ding)起到重(zhong)要作(zuo)用(yong)。工(gong)程(cheng)(cheng)投產后，將有(you)力促進西(xi)(xi)北水、火、風電(dian)“打捆(kun)”外送，帶(dai)動(dong)西(xi)(xi)北地區資源優勢(shi)向經(jing)濟優勢(shi)轉(zhuan)化。
在加(jia)快(kuai)750千伏骨干(gan)網(wang)(wang)架建(jian)設的基礎上，西(xi)北(bei)電力(li)外送(song)(song)(song)通道進入全面建(jian)設階段(duan)。據悉，西(xi)北(bei)至華中（四川）直(zhi)流(liu)聯(lian)網(wang)(wang)、西(xi)北(bei)（羅敷）至華中（靈(ling)寶）背(bei)靠背(bei)聯(lian)網(wang)(wang)擴建(jian)工程年(nian)內將投(tou)運，西(xi)北(bei)（寧東(dong)）至華北(bei)（山東(dong)）直(zhi)流(liu)工程正加(jia)快(kuai)建(jian)設。到(dao)(dao)(dao)今年(nian)年(nian)底，西(xi)北(bei)電網(wang)(wang)外送(song)(song)(song)能力(li)將達到(dao)(dao)(dao)261萬(wan)千瓦(wa)，2010年(nian)、2015年(nian)、2020年(nian)將分別(bie)達到(dao)(dao)(dao)886萬(wan)千瓦(wa)、3000萬(wan)千瓦(wa)和6000萬(wan)千瓦(wa)。隨著(zhu)電力(li)外送(song)(song)(song)規模的逐(zhu)步擴大，西(xi)北(bei)電網(wang)(wang)作為送(song)(song)(song)端(duan)電網(wang)(wang)的作用將會得到(dao)(dao)(dao)更大發揮。