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　　5月7日，西(xi)北—華中（四川(chuan)）直流聯(lian)網工(gong)(gong)程(cheng)(cheng)開工(gong)(gong)儀式在(zai)(zai)陜西(xi)寶雞、四川(chuan)德陽同(tong)時(shi)舉行(xing)。該工(gong)(gong)程(cheng)(cheng)的開工(gong)(gong)建設，標志著(zhu)國家電(dian)網公司在(zai)(zai)推進(jin)(jin)電(dian)網跨區聯(lian)網工(gong)(gong)程(cheng)(cheng)中又邁出了重(zhong)要(yao)一(yi)步(bu)，對促(cu)進(jin)(jin)電(dian)力資(zi)源更大范圍優化配置、助力西(xi)部經(jing)濟發展具有(you)重(zhong)要(yao)意義。

　　西北—華中（四川(chuan)）直流(liu)(liu)聯網(wang)工(gong)(gong)(gong)程起點為陜西寶雞換流(liu)(liu)站(zhan)，落點為四川(chuan)德(de)陽換流(liu)(liu)站(zhan)，將新建±500千(qian)(qian)伏換流(liu)(liu)站(zhan)兩(liang)座(zuo)，新建直流(liu)(liu)線(xian)路一條，全長約574千(qian)(qian)米，途經四川(chuan)、甘(gan)肅、陜西三(san)省。工(gong)(gong)(gong)程直流(liu)(liu)額(e)定電壓±500千(qian)(qian)伏，輸送容量300萬千(qian)(qian)瓦。經過各方的共同努力，該工(gong)(gong)(gong)程科研、設(she)計(ji)、施工(gong)(gong)(gong)和設(she)備(bei)(bei)制造工(gong)(gong)(gong)作穩步(bu)推進。工(gong)(gong)(gong)程核準以來，各項工(gong)(gong)(gong)作全面加快，目前已完成了工(gong)(gong)(gong)程成套設(she)計(ji)、換流(liu)(liu)站(zhan)初步(bu)設(she)計(ji)和換流(liu)(liu)站(zhan)設(she)備(bei)(bei)主設(she)備(bei)(bei)采購，輸電線(xian)路勘察設(she)計(ji)工(gong)(gong)(gong)作正(zheng)(zheng)在進行(xing)，換流(liu)(liu)站(zhan)“三(san)通(tong)一平”等開工(gong)(gong)(gong)準備(bei)(bei)工(gong)(gong)(gong)作已基本完成，具備(bei)(bei)正(zheng)(zheng)式開工(gong)(gong)(gong)條件。工(gong)(gong)(gong)程計(ji)劃(hua)2010年建成。

　　據了(le)解，我(wo)國西北(bei)地(di)區(qu)煤炭(tan)資源豐(feng)富，在(zai)全國占有重(zhong)要地(di)位。四(si)川省水(shui)(shui)電(dian)(dian)(dian)(dian)資源豐(feng)富，經濟可開發(fa)容量約1億(yi)千(qian)瓦，占全國的25%左右。西北(bei)水(shui)(shui)電(dian)(dian)(dian)(dian)調(diao)節(jie)庫容較(jiao)大(da)(da)，調(diao)節(jie)性能(neng)良(liang)好，水(shui)(shui)火電(dian)(dian)(dian)(dian)互(hu)(hu)(hu)補，電(dian)(dian)(dian)(dian)網(wang)(wang)調(diao)峰能(neng)力充足(zu)(zu)。四(si)川電(dian)(dian)(dian)(dian)網(wang)(wang)水(shui)(shui)電(dian)(dian)(dian)(dian)比(bi)重(zhong)大(da)(da)，但(dan)多(duo)為日調(diao)節(jie)及徑流式電(dian)(dian)(dian)(dian)站，調(diao)節(jie)性能(neng)差，豐(feng)、枯(ku)水(shui)(shui)期(qi)出力懸殊，豐(feng)水(shui)(shui)期(qi)棄水(shui)(shui)電(dian)(dian)(dian)(dian)量較(jiao)大(da)(da)，而枯(ku)水(shui)(shui)期(qi)水(shui)(shui)電(dian)(dian)(dian)(dian)可發(fa)電(dian)(dian)(dian)(dian)量少。工程建成后，在(zai)枯(ku)水(shui)(shui)期(qi)，西北(bei)電(dian)(dian)(dian)(dian)網(wang)(wang)每年(nian)將(jiang)向(xiang)華(hua)中電(dian)(dian)(dian)(dian)網(wang)(wang)輸(shu)送火電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)量，可極大(da)(da)地(di)緩解四(si)川由于煤炭(tan)產量不足(zu)(zu)所造成的缺電(dian)(dian)(dian)(dian)問題，并減輕(qing)西北(bei)地(di)區(qu)鐵路運輸(shu)壓力。在(zai)豐(feng)水(shui)(shui)期(qi)，西北(bei)電(dian)(dian)(dian)(dian)網(wang)(wang)每年(nian)將(jiang)接(jie)受四(si)川富余(yu)水(shui)(shui)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)量。聯網(wang)(wang)后，兩大(da)(da)電(dian)(dian)(dian)(dian)網(wang)(wang)系統可以互(hu)(hu)(hu)相獲得保證電(dian)(dian)(dian)(dian)量，減少備用(yong)(yong)容量150萬千(qian)瓦，并可在(zai)災害情況下(xia)，發(fa)揮大(da)(da)電(dian)(dian)(dian)(dian)網(wang)(wang)作用(yong)(yong)，實現(xian)互(hu)(hu)(hu)援互(hu)(hu)(hu)濟，提高電(dian)(dian)(dian)(dian)網(wang)(wang)抗災能(neng)力和可靠供電(dian)(dian)(dian)(dian)水(shui)(shui)平(ping)。

　　西北—華中聯網概況

　　2005年6月18日，國(guo)家電網(wang)公司(si)330千(qian)伏靈(ling)(ling)寶(bao)背靠(kao)背直(zhi)流(liu)(liu)聯(lian)(lian)網(wang)工(gong)程(cheng)投入(ru)試(shi)運行(xing)，西北(bei)電網(wang)和華中電網(wang)成功聯(lian)(lian)網(wang)。靈(ling)(ling)寶(bao)背靠(kao)背直(zhi)流(liu)(liu)聯(lian)(lian)網(wang)工(gong)程(cheng)是我國(guo)第一次自(zi)(zi)(zi)主設計、自(zi)(zi)(zi)主建設、自(zi)(zi)(zi)主設備制(zhi)造安裝、自(zi)(zi)(zi)主運行(xing)管理的(de)直(zhi)流(liu)(liu)聯(lian)(lian)網(wang)工(gong)程(cheng)，換(huan)流(liu)(liu)容(rong)量36萬千(qian)瓦。目前(qian)，位于河南三門峽(xia)的(de)330千(qian)伏靈(ling)(ling)寶(bao)換(huan)流(liu)(liu)站(zhan)已安全(quan)穩定運行(xing)超過(guo)1000天，部(bu)分運行(xing)指標在(zai)世界范圍(wei)內(nei)的(de)背靠(kao)背換(huan)流(liu)(liu)站(zhan)中名(ming)列前(qian)茅(mao)。

　　西北(bei)—華中（四川(chuan)）直流聯網(wang)工程是西北(bei)電網(wang)與華中電網(wang)聯網(wang)的(de)第二條輸電線路，將實現(xian)能源資源更大范(fan)圍的(de)優化配置(zhi)，效益顯著。