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　　5月7日，西(xi)北—華中（四川）直流聯網工(gong)(gong)程開工(gong)(gong)儀式在(zai)陜西(xi)寶雞、四川德陽同時舉行。該工(gong)(gong)程的開工(gong)(gong)建設，標志(zhi)著國家電網公(gong)司在(zai)推進(jin)電網跨區(qu)聯網工(gong)(gong)程中又邁出了重(zhong)要(yao)一步(bu)，對促(cu)進(jin)電力資源更大范(fan)圍優化配置、助力西(xi)部經濟發展具有重(zhong)要(yao)意(yi)義。

　　西北—華(hua)中（四川）直(zhi)流聯網工(gong)(gong)程起點為陜西寶雞換(huan)流站(zhan)，落點為四川德陽(yang)換(huan)流站(zhan)，將(jiang)新(xin)建(jian)(jian)±500千(qian)伏(fu)換(huan)流站(zhan)兩座，新(xin)建(jian)(jian)直(zhi)流線路(lu)一條，全長(chang)約574千(qian)米(mi)，途經四川、甘肅、陜西三省。工(gong)(gong)程直(zhi)流額定電壓±500千(qian)伏(fu)，輸送容量300萬(wan)千(qian)瓦(wa)。經過各(ge)方的共同努力，該工(gong)(gong)程科(ke)研、設(she)(she)(she)計、施(shi)工(gong)(gong)和(he)設(she)(she)(she)備(bei)制(zhi)造工(gong)(gong)作(zuo)(zuo)(zuo)穩步(bu)推進。工(gong)(gong)程核準以來，各(ge)項工(gong)(gong)作(zuo)(zuo)(zuo)全面(mian)加(jia)快(kuai)，目前(qian)已完(wan)成了工(gong)(gong)程成套設(she)(she)(she)計、換(huan)流站(zhan)初步(bu)設(she)(she)(she)計和(he)換(huan)流站(zhan)設(she)(she)(she)備(bei)主設(she)(she)(she)備(bei)采購，輸電線路(lu)勘(kan)察設(she)(she)(she)計工(gong)(gong)作(zuo)(zuo)(zuo)正在(zai)進行，換(huan)流站(zhan)“三通一平”等開工(gong)(gong)準備(bei)工(gong)(gong)作(zuo)(zuo)(zuo)已基本完(wan)成，具備(bei)正式開工(gong)(gong)條件。工(gong)(gong)程計劃2010年(nian)建(jian)(jian)成。

　　據(ju)了解，我國西北地(di)(di)區(qu)(qu)煤炭資源豐富(fu)(fu)(fu)，在(zai)全國占有重(zhong)要地(di)(di)位。四(si)川省水(shui)電(dian)(dian)(dian)(dian)(dian)資源豐富(fu)(fu)(fu)，經濟可開(kai)發容量(liang)(liang)約1億千瓦，占全國的(de)25%左右。西北水(shui)電(dian)(dian)(dian)(dian)(dian)調(diao)(diao)節(jie)(jie)庫容較(jiao)大，調(diao)(diao)節(jie)(jie)性能(neng)良好(hao)，水(shui)火電(dian)(dian)(dian)(dian)(dian)互補(bu)，電(dian)(dian)(dian)(dian)(dian)網(wang)調(diao)(diao)峰能(neng)力(li)(li)充足。四(si)川電(dian)(dian)(dian)(dian)(dian)網(wang)水(shui)電(dian)(dian)(dian)(dian)(dian)比重(zhong)大，但多(duo)為日調(diao)(diao)節(jie)(jie)及徑流式電(dian)(dian)(dian)(dian)(dian)站，調(diao)(diao)節(jie)(jie)性能(neng)差(cha)，豐、枯水(shui)期出力(li)(li)懸(xuan)殊(shu)，豐水(shui)期棄水(shui)電(dian)(dian)(dian)(dian)(dian)量(liang)(liang)較(jiao)大，而枯水(shui)期水(shui)電(dian)(dian)(dian)(dian)(dian)可發電(dian)(dian)(dian)(dian)(dian)量(liang)(liang)少。工程建成后，在(zai)枯水(shui)期，西北電(dian)(dian)(dian)(dian)(dian)網(wang)每(mei)年將(jiang)向(xiang)華中電(dian)(dian)(dian)(dian)(dian)網(wang)輸送火電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)量(liang)(liang)，可極大地(di)(di)緩解四(si)川由(you)于煤炭產量(liang)(liang)不足所造成的(de)缺電(dian)(dian)(dian)(dian)(dian)問題(ti)，并減輕(qing)西北地(di)(di)區(qu)(qu)鐵路運輸壓力(li)(li)。在(zai)豐水(shui)期，西北電(dian)(dian)(dian)(dian)(dian)網(wang)每(mei)年將(jiang)接受(shou)四(si)川富(fu)(fu)(fu)余(yu)水(shui)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)量(liang)(liang)。聯(lian)網(wang)后，兩(liang)大電(dian)(dian)(dian)(dian)(dian)網(wang)系統可以互相獲得保證(zheng)電(dian)(dian)(dian)(dian)(dian)量(liang)(liang)，減少備用容量(liang)(liang)150萬千瓦，并可在(zai)災害情況下，發揮大電(dian)(dian)(dian)(dian)(dian)網(wang)作用，實現(xian)互援互濟，提高電(dian)(dian)(dian)(dian)(dian)網(wang)抗災能(neng)力(li)(li)和可靠(kao)供電(dian)(dian)(dian)(dian)(dian)水(shui)平(ping)。

　　西北—華中聯網概況

　　2005年6月18日(ri)，國家電網(wang)公司330千(qian)伏靈寶(bao)背(bei)靠背(bei)直流聯(lian)網(wang)工(gong)程(cheng)投入(ru)試運行(xing)，西北電網(wang)和(he)華中電網(wang)成功聯(lian)網(wang)。靈寶(bao)背(bei)靠背(bei)直流聯(lian)網(wang)工(gong)程(cheng)是(shi)我(wo)國第一次(ci)自主(zhu)(zhu)設(she)(she)計、自主(zhu)(zhu)建設(she)(she)、自主(zhu)(zhu)設(she)(she)備制(zhi)造安裝、自主(zhu)(zhu)運行(xing)管(guan)理的直流聯(lian)網(wang)工(gong)程(cheng)，換(huan)流容量36萬(wan)千(qian)瓦。目前，位于河南三(san)門(men)峽的330千(qian)伏靈寶(bao)換(huan)流站(zhan)已安全穩定運行(xing)超過1000天，部分運行(xing)指標在(zai)世界(jie)范圍內的背(bei)靠背(bei)換(huan)流站(zhan)中名列前茅。

　　西北—華中(zhong)（四川）直流聯網工程是西北電網與華中(zhong)電網聯網的第二(er)條輸電線路(lu)，將實現能源(yuan)資(zi)源(yuan)更大范圍的優化配置(zhi)，效(xiao)益顯(xian)著。