6月26日，云南(nan)電(dian)網(wang)與南(nan)方電(dian)網(wang)主網(wang)魯西(xi)背靠背直流(liu)異步聯網(wang)二期擴建(jian)(jian)(jian)工程(cheng)建(jian)(jian)(jian)成(cheng)投(tou)(tou)運，標志著世(shi)界首(shou)個柔性直流(liu)和常規直流(liu)混合(he)背靠背換(huan)流(liu)站全(quan)面建(jian)(jian)(jian)成(cheng)投(tou)(tou)運。工程(cheng)投(tou)(tou)運后(hou)，送電(dian)規模達(da)到300萬(wan)千(qian)瓦(wa)，預計2017年可增加云南(nan)外送電(dian)量約30億(yi)千(qian)瓦(wa)時，將有效促(cu)進云南(nan)清潔水電(dian)消(xiao)納，減少廣(guang)東省、特別是珠江(jiang)三角洲的(de)污染(ran)物排放。目(mu)前，南(nan)方電(dian)網(wang)西(xi)電(dian)東送已形(xing)成(cheng)“八(ba)條交流(liu)、九(jiu)條直流(liu)”共17條500千(qian)伏及以上大(da)通(tong)道(dao)，通(tong)道(dao)能(neng)力(li)增至(zhi)4360萬(wan)千(qian)瓦(wa)。

云南(nan)電(dian)(dian)(dian)(dian)網(wang)與南(nan)網(wang)主網(wang)魯西背靠背直(zhi)(zhi)流(liu)(liu)異(yi)步(bu)(bu)聯(lian)網(wang)工(gong)程(cheng)，是目前世界上(shang)首(shou)次(ci)采用大(da)(da)(da)容量柔性直(zhi)(zhi)流(liu)(liu)與常規直(zhi)(zhi)流(liu)(liu)組合模式的(de)(de)背靠背直(zhi)(zhi)流(liu)(liu)工(gong)程(cheng)，其中(zhong)柔性直(zhi)(zhi)流(liu)(liu)容量和電(dian)(dian)(dian)(dian)壓(ya)均為世界第一(yi)(yi)。工(gong)程(cheng)全(quan)部投產后(hou)，共有200萬千瓦常規直(zhi)(zhi)流(liu)(liu)單(dan)元和100萬千瓦柔性直(zhi)(zhi)流(liu)(liu)單(dan)元。魯西背靠背直(zhi)(zhi)流(liu)(liu)異(yi)步(bu)(bu)聯(lian)網(wang)工(gong)程(cheng)是將兩個(ge)換流(liu)(liu)站建在一(yi)(yi)起，使云南(nan)電(dian)(dian)(dian)(dian)網(wang)和南(nan)方電(dian)(dian)(dian)(dian)網(wang)主網(wang)間(jian)原本聯(lian)為一(yi)(yi)體(ti)的(de)(de)大(da)(da)(da)電(dian)(dian)(dian)(dian)網(wang)，形成兩個(ge)不(bu)同(tong)步(bu)(bu)運行的(de)(de)電(dian)(dian)(dian)(dian)網(wang)。這就類似于在云南(nan)西電(dian)(dian)(dian)(dian)東(dong)送大(da)(da)(da)通(tong)道上(shang)加了一(yi)(yi)個(ge)“安全(quan)閥(fa)”，當一(yi)(yi)側(ce)出現故障(zhang)，可以避(bi)免影響到另(ling)外一(yi)(yi)側(ce)，提高主電(dian)(dian)(dian)(dian)網(wang)的(de)(de)安全(quan)可靠性，也促(cu)進了清潔能源消(xiao)納。