文(wen)章來源：國(guo)家電(dian)網公(gong)司 發(fa)布時間：2010-05-31
5月25日18時(shi)，國家(jia)電(dian)(dian)網(wang)公司西北電(dian)(dian)網(wang)750千(qian)(qian)伏(fu)(fu)(fu)骨干網(wang)架的標(biao)志性(xing)工程——750千(qian)(qian)伏(fu)(fu)(fu)蘭州(zhou)東—平涼—乾縣(xian)輸(shu)變(bian)電(dian)(dian)工程竣工投產，這是繼750千(qian)(qian)伏(fu)(fu)(fu)示范工程之(zhi)后又一里程碑(bei)工程，也是國內(nei)第一個同塔雙回750千(qian)(qian)伏(fu)(fu)(fu)輸(shu)變(bian)電(dian)(dian)工程。該工程標(biao)志著750千(qian)(qian)伏(fu)(fu)(fu)送(song)端電(dian)(dian)網(wang)已覆蓋陜西、甘肅、青海、寧夏四省（自治區），對(dui)于(yu)推進西北電(dian)(dian)力大規模外送(song)、促進全國能源(yuan)資源(yuan)優化(hua)配置(zhi)將發揮重(zhong)要(yao)作用(yong)。
750千(qian)(qian)伏(fu)蘭(lan)州東—平涼—乾縣(xian)輸變電(dian)(dian)(dian)工程自5月13日開始系(xi)統(tong)調(diao)試，完成(cheng)了15個(ge)(ge)調(diao)試項目，對工程設計、施工、主(zhu)要電(dian)(dian)(dian)氣設備安裝(zhuang)制造質量以及整個(ge)(ge)西北750千(qian)(qian)伏(fu)電(dian)(dian)(dian)網系(xi)統(tong)帶電(dian)(dian)(dian)等各個(ge)(ge)環節進行了考驗(yan)。系(xi)統(tong)調(diao)試期間，在西北電(dian)(dian)(dian)網西電(dian)(dian)(dian)東送潮流90萬千(qian)(qian)瓦情況下，從甘肅(su)平涼向陜西乾縣(xian)送電(dian)(dian)(dian)50多萬千(qian)(qian)瓦，體現了750千(qian)(qian)伏(fu)電(dian)(dian)(dian)網遠距離(li)送電(dian)(dian)(dian)的巨大優(you)勢。
該工程自2007年8月15日開工建(jian)設。包括新(xin)建(jian)750千伏乾(qian)縣變(bian)電(dian)站(zhan)，主變(bian)規劃(hua)容量3×210萬千伏安(an)、本(ben)期(qi)建(jian)設1臺；750千伏出線(xian)遠(yuan)期(qi)9回(hui)(hui)(hui)，本(ben)期(qi)2回(hui)(hui)(hui)；330千伏出線(xian)遠(yuan)期(qi)13回(hui)(hui)(hui)，本(ben)期(qi)5回(hui)(hui)(hui)；新(xin)建(jian)甘肅(su)平(ping)(ping)涼(liang)開關站(zhan)，擴建(jian)750千伏甘肅(su)蘭(lan)州(zhou)東變(bian)電(dian)站(zhan)；新(xin)建(jian)750千伏蘭(lan)州(zhou)東—平(ping)(ping)涼(liang)—乾(qian)縣雙(shuang)回(hui)(hui)(hui)線(xian)路(lu)，線(xian)路(lu)總(zong)長2×442千米，為國內首(shou)次采用同(tong)桿雙(shuang)回(hui)(hui)(hui)并架技術電(dian)壓等級最高(gao)的輸變(bian)電(dian)線(xian)路(lu)。
750千伏蘭(lan)州東—平(ping)涼—乾縣輸變電工程(cheng)是(shi)西(xi)(xi)北(bei)(bei)750千伏電網(wang)主網(wang)架的(de)核心工程(cheng)，也是(shi)陜(shan)(shan)西(xi)(xi)境(jing)內的(de)第一個750千伏電網(wang)項目，西(xi)(xi)北(bei)(bei)實(shi)施(shi)“西(xi)(xi)電東送”戰(zhan)略的(de)主通道(dao)。工程(cheng)對加強陜(shan)(shan)甘斷面潮流交換(huan)，確保陜(shan)(shan)西(xi)(xi)迎峰度夏期間可靠用電、保持(chi)西(xi)(xi)北(bei)(bei)電網(wang)系統穩(wen)定起(qi)到(dao)重(zhong)要作用。工程(cheng)投產后(hou)，將有(you)力(li)促進西(xi)(xi)北(bei)(bei)水、火(huo)、風電“打捆”外送，帶(dai)動西(xi)(xi)北(bei)(bei)地區(qu)資源(yuan)優(you)勢向經濟優(you)勢轉化。
在加快750千(qian)(qian)伏骨干(gan)網(wang)(wang)架(jia)建設(she)的基(ji)礎上，西北(bei)(bei)電力外送通(tong)道(dao)進入全面建設(she)階(jie)段(duan)。據悉，西北(bei)(bei)至(zhi)(zhi)華中（四川）直流聯網(wang)(wang)、西北(bei)(bei)（羅敷）至(zhi)(zhi)華中（靈寶）背靠背聯網(wang)(wang)擴建工程(cheng)年(nian)內將(jiang)投運，西北(bei)(bei)（寧東）至(zhi)(zhi)華北(bei)(bei)（山東）直流工程(cheng)正加快建設(she)。到(dao)今(jin)年(nian)年(nian)底，西北(bei)(bei)電網(wang)(wang)外送能力將(jiang)達到(dao)261萬(wan)千(qian)(qian)瓦，2010年(nian)、2015年(nian)、2020年(nian)將(jiang)分(fen)別達到(dao)886萬(wan)千(qian)(qian)瓦、3000萬(wan)千(qian)(qian)瓦和(he)6000萬(wan)千(qian)(qian)瓦。隨著電力外送規模(mo)的逐步擴大，西北(bei)(bei)電網(wang)(wang)作(zuo)為送端(duan)電網(wang)(wang)的作(zuo)用(yong)將(jiang)會得到(dao)更(geng)大發(fa)揮(hui)。