文章來源：國家電網(wang)公(gong)司 發布時(shi)間：2010-12-18
12月16日3時20分，750千(qian)(qian)伏(fu)寶雞—乾(qian)縣輸變電(dian)工(gong)程(cheng)正式投(tou)運，西北750千(qian)(qian)伏(fu)主網架與±500千(qian)(qian)伏(fu)西北—華中（四川）直流(liu)(liu)輸變電(dian)工(gong)程(cheng)成功(gong)對接。750千(qian)(qian)伏(fu)主電(dian)網匯集西北地區豐(feng)富的(de)水電(dian)、火電(dian)、風電(dian)資源(yuan)，通過直流(liu)(liu)輸電(dian)“打捆”外(wai)送的(de)宏偉規(gui)劃正在逐(zhu)步變成現實。
西(xi)(xi)北(bei)地區(qu)是(shi)我國(guo)重(zhong)要的(de)(de)能(neng)源(yuan)(yuan)(yuan)基地，水力(li)、煤炭(tan)、風能(neng)、太(tai)陽能(neng)等能(neng)源(yuan)(yuan)(yuan)資源(yuan)(yuan)(yuan)豐富，發展潛力(li)巨大。這決(jue)定了西(xi)(xi)北(bei)電網(wang)(wang)作為重(zhong)要的(de)(de)能(neng)源(yuan)(yuan)(yuan)輸出(chu)電網(wang)(wang)的(de)(de)戰略地位。近年來，西(xi)(xi)北(bei)電網(wang)(wang)有限公司加快750千伏主(zhu)網(wang)(wang)架和電力(li)外(wai)送(song)通道建(jian)設，西(xi)(xi)北(bei)電網(wang)(wang)內“點(dian)對網(wang)(wang)”、“網(wang)(wang)對網(wang)(wang)”、“背靠(kao)背”、交(jiao)直流(liu)混合運行等多(duo)(duo)種(zhong)輸電方式共(gong)同發展，多(duo)(duo)通道、多(duo)(duo)方向、多(duo)(duo)落點(dian)、多(duo)(duo)種(zhong)輸電方式、多(duo)(duo)種(zhong)電源(yuan)(yuan)(yuan)類型的(de)(de)電力(li)大規模外(wai)送(song)格局初步形成(cheng)。
750千(qian)(qian)(qian)(qian)伏(fu)寶(bao)乾(qian)輸(shu)變(bian)電(dian)工程(cheng)(cheng)全(quan)長(chang)95千(qian)(qian)(qian)(qian)米，按同(tong)(tong)塔雙回路設計，起于750千(qian)(qian)(qian)(qian)伏(fu)乾(qian)縣變(bian)電(dian)站(zhan)，止于750千(qian)(qian)(qian)(qian)伏(fu)寶(bao)雞(ji)(ji)變(bian)電(dian)站(zhan)。其中，750千(qian)(qian)(qian)(qian)伏(fu)寶(bao)雞(ji)(ji)變(bian)電(dian)站(zhan)與(yu)西(xi)北(bei)—華中直(zhi)流輸(shu)變(bian)電(dian)工程(cheng)(cheng)的(de)(de)±500千(qian)(qian)(qian)(qian)伏(fu)寶(bao)雞(ji)(ji)換流站(zhan)同(tong)(tong)址合(he)建，是世界上首(shou)座750千(qian)(qian)(qian)(qian)伏(fu)交流變(bian)與(yu)±500千(qian)(qian)(qian)(qian)伏(fu)直(zhi)流變(bian)合(he)建的(de)(de)變(bian)電(dian)站(zhan)。
750千伏(fu)寶乾輸變電(dian)(dian)(dian)工(gong)程的投運，標志著西北電(dian)(dian)(dian)網(wang)水電(dian)(dian)(dian)、火電(dian)(dian)(dian)、風電(dian)(dian)(dian)“打捆(kun)”外送戰略邁(mai)出了堅實一步(bu)。西北地區豐富的電(dian)(dian)(dian)力資源，將通過750千伏(fu)主網(wang)匯(hui)集后，輸送至(zhi)750千伏(fu)寶雞變電(dian)(dian)(dian)站，再(zai)通過±500千伏(fu)西北—華中(zhong)直流工(gong)程向華中(zhong)電(dian)(dian)(dian)網(wang)送電(dian)(dian)(dian)。
寶乾(qian)輸變電(dian)工程(cheng)的投運(yun)，還解(jie)決(jue)了(le)陜(shan)西彬長電(dian)廠送(song)出受限、寶雞地區330千(qian)伏電(dian)網(wang)負(fu)載過重的問(wen)題，使陜(shan)西電(dian)力外送(song)步伐大(da)大(da)加快。該(gai)工程(cheng)是陜(shan)西電(dian)網(wang)從(cong)330千(qian)伏向(xiang)750千(qian)伏升級的重要工程(cheng)，也是陜(shan)西境內(nei)繼750千(qian)伏彬乾(qian)線后，投運(yun)的第二項(xiang)750千(qian)伏工程(cheng)。
西北電網(wang)(wang)具有(you)大規模外送的能力，預計2010年(nian)(nian)，西北電網(wang)(wang)可外送電量(liang)1000億千瓦(wa)時以上(shang)。據悉，明年(nian)(nian)西北—華中直(zhi)流聯(lian)網(wang)(wang)工程雙極(ji)投運后，西北電網(wang)(wang)、華中電網(wang)(wang)交換功率可達(da)(da)到411萬千瓦(wa)，交易(yi)(yi)電量(liang)將實現(xian)跨越式增長，預計年(nian)(nian)交易(yi)(yi)量(liang)達(da)(da)到150億千瓦(wa)時以上(shang)，超過(guo)兩(liang)個區(qu)域電網(wang)(wang)聯(lian)網(wang)(wang)以來(lai)電能交易(yi)(yi)的總量(liang)。