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3月29日，由南方電(dian)(dian)網(wang)公(gong)司投(tou)資(zi)建設的(de)烏東德電(dian)(dian)站送電(dian)(dian)廣東廣西特(te)(te)(te)高壓(ya)多端直(zhi)流(liu)(liu)示(shi)范(fan)工(gong)(gong)(gong)(gong)程獲國(guo)家(jia)發展改革委核準(zhun)。該(gai)工(gong)(gong)(gong)(gong)程是國(guo)家(jia)電(dian)(dian)力發展“十三五”規(gui)劃(hua)要求的(de)跨省區輸電(dian)(dian)重(zhong)點工(gong)(gong)(gong)(gong)程和國(guo)家(jia)重(zhong)大(da)(da)創(chuang)新示(shi)范(fan)工(gong)(gong)(gong)(gong)程，建成后將創(chuang)造(zao)多項(xiang)世(shi)界第一(yi)：世(shi)界上容(rong)量最大(da)(da)的(de)特(te)(te)(te)高壓(ya)多端直(zhi)流(liu)(liu)輸電(dian)(dian)工(gong)(gong)(gong)(gong)程、世(shi)界上首個特(te)(te)(te)高壓(ya)多端混合直(zhi)流(liu)(liu)工(gong)(gong)(gong)(gong)程、首個特(te)(te)(te)高壓(ya)柔(rou)(rou)性(xing)直(zhi)流(liu)(liu)換流(liu)(liu)站工(gong)(gong)(gong)(gong)程、首個具(ju)備架空線路直(zhi)流(liu)(liu)故障自清除能力的(de)柔(rou)(rou)性(xing)直(zhi)流(liu)(liu)輸電(dian)(dian)工(gong)(gong)(gong)(gong)程。

工(gong)程擬建設±800千伏特高壓三端直(zhi)流，輸送(song)容量(liang)800萬(wan)(wan)千瓦(wa)，向(xiang)廣(guang)(guang)東送(song)電500萬(wan)(wan)千瓦(wa)，向(xiang)廣(guang)(guang)西(xi)送(song)電300萬(wan)(wan)千瓦(wa)，送(song)端為云南昆明祿勸(quan)縣，受端為廣(guang)(guang)東惠(hui)州(zhou)龍門縣和廣(guang)(guang)西(xi)柳州(zhou)鹿(lu)寨縣，線(xian)路全(quan)長(chang)約為1489公(gong)里，途經云南、貴州(zhou)、廣(guang)(guang)西(xi)、廣(guang)(guang)東四省（區(qu)）。工(gong)程計劃于2020年(nian)投產送(song)電，2021年(nian)全(quan)部建成投產，屆時可(ke)增(zeng)加800萬(wan)(wan)千瓦(wa)的云南清潔水電送(song)電廣(guang)(guang)東、廣(guang)(guang)西(xi)，年(nian)送(song)電量(liang)超(chao)過320億千瓦(wa)時，每年(nian)可(ke)減(jian)少煤(mei)炭(tan)消(xiao)耗920萬(wan)(wan)噸、二(er)氧化碳排放2450萬(wan)(wan)噸，對進(jin)一步(bu)促(cu)進(jin)云南水電等(deng)清潔能(neng)源(yuan)消(xiao)納、保(bao)障廣(guang)(guang)東廣(guang)(guang)西(xi)電力供(gong)應、保(bao)護生態環境、助力打好污染(ran)防治攻堅戰具有重要意義。

作為(wei)世界(jie)首個(ge)特(te)(te)高壓(ya)大(da)容(rong)量多端(duan)(duan)混合(he)直(zhi)(zhi)流(liu)輸電工程(cheng)，其(qi)(qi)容(rong)量超過現有世界(jie)上最大(da)容(rong)量為(wei)600萬千瓦的(de)特(te)(te)高壓(ya)多端(duan)(duan)直(zhi)(zhi)流(liu)工程(cheng)——印度(du)東北—阿格拉(la)輸電線路(lu)工程(cheng)。多端(duan)(duan)直(zhi)(zhi)流(liu)相對常規直(zhi)(zhi)流(liu)，打破線路(lu)僅(jin)連接兩點的(de)固有模式，形成一條線上多點連接布局，減少(shao)線路(lu)建設里(li)程(cheng)、換流(liu)站(zhan)點數(shu)量等(deng)，提升經濟性(xing)。“混合(he)”則(ze)體現在，其(qi)(qi)送端(duan)(duan)采用常規直(zhi)(zhi)流(liu)、受端(duan)(duan)采用柔性(xing)直(zhi)(zhi)流(liu)技術，工程(cheng)特(te)(te)高壓(ya)柔性(xing)直(zhi)(zhi)流(liu)換流(liu)站(zhan)建有2個(ge)，分(fen)別位于(yu)兩個(ge)受端(duan)(duan)處，架空(kong)線路(lu)直(zhi)(zhi)流(liu)故障自清(qing)除能力(li)與柔性(xing)直(zhi)(zhi)流(liu)系(xi)統的(de)應用，能提升電網(wang)運行的(de)安全性(xing)、穩定性(xing)、靈活性(xing)。

據了(le)解，工(gong)(gong)程(cheng)(cheng)前期(qi)工(gong)(gong)作在同類工(gong)(gong)程(cheng)(cheng)中最(zui)為復雜(za)，技術(shu)方案論(lun)證(zheng)首次開(kai)展了(le)特(te)高壓(ya)多端直流(liu)、特(te)高壓(ya)柔性(xing)(xing)直流(liu)、特(te)高壓(ya)常規(gui)直流(liu)與(yu)柔性(xing)(xing)直流(liu)混合系統、特(te)高壓(ya)柔性(xing)(xing)直流(liu)的(de)(de)長距離架空線(xian)路應用等創新工(gong)(gong)作，經多方反(fan)復研究論(lun)證(zheng)得以通過。工(gong)(gong)程(cheng)(cheng)具有極(ji)大示范意義(yi)，有利(li)于我國占(zhan)領特(te)高壓(ya)多端、柔性(xing)(xing)直流(liu)輸電(dian)(dian)技術(shu)制高點，提升遠(yuan)距離、大容量(liang)、多電(dian)(dian)源狀況下電(dian)(dian)網運行的(de)(de)安全穩定和(he)經濟性(xing)(xing)，從長遠(yuan)看將為未來大規(gui)模可再生能源基地的(de)(de)開(kai)發與(yu)并網提供強有力的(de)(de)技術(shu)支撐。

【責任編輯：王莉】