文章來源(yuan)：國家電網(wang)公司 發布時間：2010-05-31
5月25日18時，國家電(dian)(dian)網(wang)公司西(xi)北電(dian)(dian)網(wang)750千(qian)伏(fu)骨干(gan)網(wang)架的標(biao)志性工程(cheng)——750千(qian)伏(fu)蘭州(zhou)東(dong)—平涼—乾(qian)縣(xian)輸變電(dian)(dian)工程(cheng)竣工投產，這(zhe)是繼750千(qian)伏(fu)示范工程(cheng)之后又一里(li)程(cheng)碑工程(cheng)，也是國內第一個(ge)同塔(ta)雙回750千(qian)伏(fu)輸變電(dian)(dian)工程(cheng)。該工程(cheng)標(biao)志著750千(qian)伏(fu)送(song)端電(dian)(dian)網(wang)已覆蓋陜西(xi)、甘肅、青海、寧夏四省（自治區），對(dui)于推進(jin)西(xi)北電(dian)(dian)力大規(gui)模(mo)外送(song)、促(cu)進(jin)全國能源資源優化配置將發(fa)揮(hui)重要作用。
750千伏蘭州東—平(ping)涼(liang)—乾(qian)縣輸(shu)變(bian)電(dian)工(gong)(gong)(gong)程自5月13日開始系(xi)統調試，完(wan)成了15個(ge)調試項目，對工(gong)(gong)(gong)程設計(ji)、施工(gong)(gong)(gong)、主要電(dian)氣設備安裝(zhuang)制造質量以及整個(ge)西北750千伏電(dian)網(wang)系(xi)統帶電(dian)等各個(ge)環節進行了考驗(yan)。系(xi)統調試期間，在西北電(dian)網(wang)西電(dian)東送(song)潮流90萬(wan)千瓦(wa)情況下，從甘肅平(ping)涼(liang)向陜西乾(qian)縣送(song)電(dian)50多萬(wan)千瓦(wa)，體現了750千伏電(dian)網(wang)遠距離送(song)電(dian)的巨大優勢(shi)。
該工(gong)程自(zi)2007年8月15日開工(gong)建(jian)(jian)設(she)。包括(kuo)新建(jian)(jian)750千(qian)伏(fu)(fu)乾縣(xian)變(bian)電站，主變(bian)規劃容量(liang)3×210萬(wan)千(qian)伏(fu)(fu)安、本(ben)期建(jian)(jian)設(she)1臺；750千(qian)伏(fu)(fu)出(chu)線(xian)(xian)遠(yuan)期9回(hui)(hui)，本(ben)期2回(hui)(hui)；330千(qian)伏(fu)(fu)出(chu)線(xian)(xian)遠(yuan)期13回(hui)(hui)，本(ben)期5回(hui)(hui)；新建(jian)(jian)甘肅平涼(liang)開關站，擴建(jian)(jian)750千(qian)伏(fu)(fu)甘肅蘭(lan)(lan)州東變(bian)電站；新建(jian)(jian)750千(qian)伏(fu)(fu)蘭(lan)(lan)州東—平涼(liang)—乾縣(xian)雙回(hui)(hui)線(xian)(xian)路，線(xian)(xian)路總(zong)長(chang)2×442千(qian)米，為國內首次采(cai)用同桿雙回(hui)(hui)并架技術電壓等級最(zui)高的輸變(bian)電線(xian)(xian)路。
750千伏(fu)蘭州東—平(ping)涼—乾縣輸變電(dian)工(gong)程(cheng)是西(xi)北(bei)750千伏(fu)電(dian)網主網架(jia)的核心工(gong)程(cheng)，也是陜西(xi)境內(nei)的第一個750千伏(fu)電(dian)網項目(mu)，西(xi)北(bei)實施“西(xi)電(dian)東送”戰略的主通道。工(gong)程(cheng)對加強(qiang)陜甘斷面潮流交換，確(que)保(bao)(bao)陜西(xi)迎峰度(du)夏(xia)期(qi)間可靠用(yong)電(dian)、保(bao)(bao)持(chi)西(xi)北(bei)電(dian)網系統穩定起到重要作用(yong)。工(gong)程(cheng)投(tou)產后，將有力促進西(xi)北(bei)水、火、風(feng)電(dian)“打(da)捆”外送，帶(dai)動西(xi)北(bei)地區資源(yuan)優(you)勢向(xiang)經濟優(you)勢轉(zhuan)化。
在加快750千(qian)(qian)(qian)(qian)(qian)伏(fu)骨干網(wang)(wang)架建設的(de)基(ji)礎上，西(xi)北(bei)電(dian)力(li)外(wai)送(song)通道進(jin)入全面建設階段。據悉(xi)，西(xi)北(bei)至(zhi)華(hua)中(zhong)（四川）直流(liu)聯網(wang)(wang)、西(xi)北(bei)（羅敷(fu)）至(zhi)華(hua)中(zhong)（靈寶(bao)）背靠背聯網(wang)(wang)擴(kuo)建工程(cheng)年(nian)(nian)內(nei)將投運(yun)，西(xi)北(bei)（寧東(dong)）至(zhi)華(hua)北(bei)（山東(dong)）直流(liu)工程(cheng)正加快建設。到(dao)今年(nian)(nian)年(nian)(nian)底(di)，西(xi)北(bei)電(dian)網(wang)(wang)外(wai)送(song)能力(li)將達(da)到(dao)261萬千(qian)(qian)(qian)(qian)(qian)瓦，2010年(nian)(nian)、2015年(nian)(nian)、2020年(nian)(nian)將分(fen)別達(da)到(dao)886萬千(qian)(qian)(qian)(qian)(qian)瓦、3000萬千(qian)(qian)(qian)(qian)(qian)瓦和6000萬千(qian)(qian)(qian)(qian)(qian)瓦。隨著電(dian)力(li)外(wai)送(song)規模(mo)的(de)逐(zhu)步(bu)擴(kuo)大，西(xi)北(bei)電(dian)網(wang)(wang)作為送(song)端(duan)電(dian)網(wang)(wang)的(de)作用(yong)將會(hui)得到(dao)更大發揮。