文章(zhang)來源：中國南(nan)方電網有限責任公(gong)司 發布時間(jian)：2018-06-28
6月26日，云南(nan)(nan)電(dian)(dian)網與(yu)南(nan)(nan)方電(dian)(dian)網主網魯西背(bei)靠背(bei)直流(liu)(liu)異步聯網二期擴建工(gong)程建成(cheng)投運(yun)(yun)，標志著(zhu)世界首(shou)個柔性直流(liu)(liu)和常規直流(liu)(liu)混合背(bei)靠背(bei)換流(liu)(liu)站全面建成(cheng)投運(yun)(yun)。工(gong)程投運(yun)(yun)后，送電(dian)(dian)規模達到(dao)300萬千(qian)瓦，預計2017年可增(zeng)加云南(nan)(nan)外送電(dian)(dian)量約30億千(qian)瓦時，將有(you)效促(cu)進(jin)云南(nan)(nan)清潔水電(dian)(dian)消(xiao)納，減少(shao)廣東(dong)省、特(te)別是珠江三角洲(zhou)的污染物(wu)排放。目前，南(nan)(nan)方電(dian)(dian)網西電(dian)(dian)東(dong)送已(yi)形(xing)成(cheng)“八條(tiao)交(jiao)流(liu)(liu)、九(jiu)條(tiao)直流(liu)(liu)”共17條(tiao)500千(qian)伏及以上大通(tong)道，通(tong)道能力增(zeng)至(zhi)4360萬千(qian)瓦。
云南電(dian)(dian)(dian)網(wang)(wang)(wang)與南網(wang)(wang)(wang)主網(wang)(wang)(wang)魯西(xi)背(bei)(bei)(bei)靠背(bei)(bei)(bei)直(zhi)(zhi)流異步(bu)聯(lian)網(wang)(wang)(wang)工(gong)程(cheng)，是(shi)目(mu)前世界上首次采用大(da)容(rong)量(liang)柔性直(zhi)(zhi)流與常規直(zhi)(zhi)流組合模式(shi)的(de)背(bei)(bei)(bei)靠背(bei)(bei)(bei)直(zhi)(zhi)流工(gong)程(cheng)，其中柔性直(zhi)(zhi)流容(rong)量(liang)和電(dian)(dian)(dian)壓均為(wei)世界第一。工(gong)程(cheng)全(quan)部投產后，共有200萬(wan)千瓦常規直(zhi)(zhi)流單(dan)(dan)元和100萬(wan)千瓦柔性直(zhi)(zhi)流單(dan)(dan)元。魯西(xi)背(bei)(bei)(bei)靠背(bei)(bei)(bei)直(zhi)(zhi)流異步(bu)聯(lian)網(wang)(wang)(wang)工(gong)程(cheng)是(shi)將(jiang)兩個(ge)(ge)換(huan)流站建在一起，使云南電(dian)(dian)(dian)網(wang)(wang)(wang)和南方電(dian)(dian)(dian)網(wang)(wang)(wang)主網(wang)(wang)(wang)間原本聯(lian)為(wei)一體的(de)大(da)電(dian)(dian)(dian)網(wang)(wang)(wang)，形成兩個(ge)(ge)不同(tong)步(bu)運行的(de)電(dian)(dian)(dian)網(wang)(wang)(wang)。這就類似于在云南西(xi)電(dian)(dian)(dian)東送大(da)通道(dao)上加了一個(ge)(ge)“安(an)全(quan)閥(fa)”，當一側出現故障，可(ke)以避免(mian)影(ying)響到(dao)另外一側，提高(gao)主電(dian)(dian)(dian)網(wang)(wang)(wang)的(de)安(an)全(quan)可(ke)靠性，也促進(jin)了清(qing)潔能(neng)源消納(na)。