免费菠萝视频app下载

　　5月(yue)7日(ri)，西(xi)北—華中（四川）直流聯(lian)網(wang)工(gong)程開工(gong)儀(yi)式在陜西(xi)寶雞、四川德陽同時舉行。該工(gong)程的開工(gong)建設(she)，標志(zhi)著(zhu)國家(jia)電網(wang)公司(si)在推進電網(wang)跨區聯(lian)網(wang)工(gong)程中又邁出(chu)了重(zhong)要一步，對促進電力資(zi)源更大范圍優化配(pei)置、助(zhu)力西(xi)部經濟(ji)發展具有重(zhong)要意(yi)義(yi)。

　　西北—華中（四(si)川）直(zhi)流(liu)聯網工程(cheng)起點(dian)為陜西寶雞換流(liu)站(zhan)，落點(dian)為四(si)川德陽(yang)換流(liu)站(zhan)，將新建±500千伏換流(liu)站(zhan)兩(liang)座，新建直(zhi)流(liu)線路(lu)一條，全長約(yue)574千米(mi)，途經(jing)四(si)川、甘肅、陜西三省。工程(cheng)直(zhi)流(liu)額定電(dian)壓±500千伏，輸(shu)送容(rong)量300萬千瓦。經(jing)過(guo)各方的(de)共同努力，該(gai)工程(cheng)科研、設(she)計、施工和設(she)備(bei)(bei)(bei)制造工作(zuo)穩步推進。工程(cheng)核(he)準以來，各項工作(zuo)全面加快，目前(qian)已完成(cheng)(cheng)了工程(cheng)成(cheng)(cheng)套(tao)設(she)計、換流(liu)站(zhan)初步設(she)計和換流(liu)站(zhan)設(she)備(bei)(bei)(bei)主設(she)備(bei)(bei)(bei)采購，輸(shu)電(dian)線路(lu)勘(kan)察設(she)計工作(zuo)正在進行(xing)，換流(liu)站(zhan)“三通(tong)一平”等(deng)開工準備(bei)(bei)(bei)工作(zuo)已基本完成(cheng)(cheng)，具(ju)備(bei)(bei)(bei)正式開工條件。工程(cheng)計劃2010年建成(cheng)(cheng)。

　　據了解，我國(guo)西(xi)(xi)(xi)北(bei)地(di)(di)(di)區煤炭資源豐(feng)富，在全(quan)國(guo)占(zhan)(zhan)有重(zhong)要地(di)(di)(di)位。四(si)(si)川(chuan)省水(shui)(shui)(shui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)資源豐(feng)富，經濟可(ke)開發(fa)(fa)容量(liang)約(yue)1億千(qian)(qian)瓦(wa)，占(zhan)(zhan)全(quan)國(guo)的25%左右。西(xi)(xi)(xi)北(bei)水(shui)(shui)(shui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)調(diao)(diao)節(jie)庫(ku)容較大(da)，調(diao)(diao)節(jie)性能(neng)良好，水(shui)(shui)(shui)火電(dian)(dian)(dian)(dian)(dian)(dian)(dian)互補，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)網(wang)(wang)(wang)調(diao)(diao)峰能(neng)力充足。四(si)(si)川(chuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)網(wang)(wang)(wang)水(shui)(shui)(shui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)比(bi)重(zhong)大(da)，但多為日調(diao)(diao)節(jie)及徑流(liu)式電(dian)(dian)(dian)(dian)(dian)(dian)(dian)站，調(diao)(diao)節(jie)性能(neng)差，豐(feng)、枯水(shui)(shui)(shui)期(qi)(qi)(qi)出力懸殊(shu)，豐(feng)水(shui)(shui)(shui)期(qi)(qi)(qi)棄(qi)水(shui)(shui)(shui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)量(liang)較大(da)，而枯水(shui)(shui)(shui)期(qi)(qi)(qi)水(shui)(shui)(shui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)可(ke)發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)量(liang)少(shao)。工程(cheng)建成后(hou)，在枯水(shui)(shui)(shui)期(qi)(qi)(qi)，西(xi)(xi)(xi)北(bei)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)網(wang)(wang)(wang)每(mei)年將向華中電(dian)(dian)(dian)(dian)(dian)(dian)(dian)網(wang)(wang)(wang)輸送火電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)量(liang)，可(ke)極大(da)地(di)(di)(di)緩解四(si)(si)川(chuan)由于煤炭產量(liang)不足所造成的缺電(dian)(dian)(dian)(dian)(dian)(dian)(dian)問題，并減輕西(xi)(xi)(xi)北(bei)地(di)(di)(di)區鐵路運輸壓力。在豐(feng)水(shui)(shui)(shui)期(qi)(qi)(qi)，西(xi)(xi)(xi)北(bei)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)網(wang)(wang)(wang)每(mei)年將接受四(si)(si)川(chuan)富余水(shui)(shui)(shui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)量(liang)。聯(lian)網(wang)(wang)(wang)后(hou)，兩(liang)大(da)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)網(wang)(wang)(wang)系統可(ke)以互相獲得保證電(dian)(dian)(dian)(dian)(dian)(dian)(dian)量(liang)，減少(shao)備用容量(liang)150萬千(qian)(qian)瓦(wa)，并可(ke)在災害情況下(xia)，發(fa)(fa)揮(hui)大(da)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)網(wang)(wang)(wang)作用，實現互援互濟，提高電(dian)(dian)(dian)(dian)(dian)(dian)(dian)網(wang)(wang)(wang)抗災能(neng)力和可(ke)靠(kao)供電(dian)(dian)(dian)(dian)(dian)(dian)(dian)水(shui)(shui)(shui)平(ping)。

　　西北—華中聯網概況

　　2005年6月18日(ri)，國家電網公司330千(qian)伏(fu)靈寶(bao)背(bei)靠(kao)背(bei)直(zhi)流聯(lian)網工程(cheng)(cheng)投入試(shi)運(yun)(yun)行(xing)，西北電網和華中電網成功聯(lian)網。靈寶(bao)背(bei)靠(kao)背(bei)直(zhi)流聯(lian)網工程(cheng)(cheng)是我(wo)國第一(yi)次(ci)自(zi)主設(she)計、自(zi)主建設(she)、自(zi)主設(she)備制造(zao)安裝、自(zi)主運(yun)(yun)行(xing)管理的直(zhi)流聯(lian)網工程(cheng)(cheng)，換流容量36萬千(qian)瓦(wa)。目(mu)前，位于河(he)南三門峽(xia)的330千(qian)伏(fu)靈寶(bao)換流站已(yi)安全穩定(ding)運(yun)(yun)行(xing)超過1000天，部分運(yun)(yun)行(xing)指標(biao)在世界(jie)范圍內的背(bei)靠(kao)背(bei)換流站中名列前茅。

　　西北—華中（四川(chuan)）直(zhi)流聯(lian)網(wang)工程是(shi)西北電網(wang)與(yu)華中電網(wang)聯(lian)網(wang)的(de)第二條輸電線路，將實(shi)現能(neng)源資源更大范圍的(de)優化配置，效益顯著。