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7月21日，隨著位于張家口市蔚縣3R003～3R012區段最后一相導線牽引到位，張北—雄安1000千伏特高壓交流輸變電工程（冀北段）實現全線貫通。至此，張北—雄安1000千伏特高壓交流輸變電工程全線貫通。此前，張北—雄安1000千伏特高壓交流輸變電工程（河北段）已于7月18日全線貫通。

張(zhang)北—雄安1000千(qian)伏特(te)(te)高壓交流輸(shu)變電工(gong)程(cheng)線路全(quan)長2×319.9千(qian)米(mi)(mi)(mi)，起(qi)自張(zhang)家口張(zhang)北特(te)(te)高壓變電站(zhan)(zhan)，止于保定(ding)雄安特(te)(te)高壓變電站(zhan)(zhan)，途經張(zhang)家口張(zhang)北縣(xian)(xian)(xian)(xian)、萬全(quan)區(qu)、懷(huai)安縣(xian)(xian)(xian)(xian)、陽原縣(xian)(xian)(xian)(xian)、蔚(yu)縣(xian)(xian)(xian)(xian)和保定(ding)淶(lai)源(yuan)縣(xian)(xian)(xian)(xian)、易(yi)縣(xian)(xian)(xian)(xian)、徐水區(qu)、定(ding)興縣(xian)(xian)(xian)(xian)共(gong)9個縣(xian)(xian)(xian)(xian)（區(qu)）。工(gong)程(cheng)冀北段全(quan)長2×218千(qian)米(mi)(mi)(mi)，其中2×132千(qian)米(mi)(mi)(mi)同(tong)塔雙回(hui)(hui)架(jia)設，其余2×86千(qian)米(mi)(mi)(mi)按兩個單回(hui)(hui)路并(bing)行架(jia)設，新建鐵塔558基(ji)；工(gong)程(cheng)河北段新建鐵塔234基(ji)。

工(gong)(gong)(gong)(gong)程(cheng)自2019年3月正式開工(gong)(gong)(gong)(gong)建設以(yi)來，在國家電(dian)網(wang)有(you)限(xian)(xian)公(gong)司特(te)高壓部的(de)統籌(chou)下，工(gong)(gong)(gong)(gong)程(cheng)建管單(dan)位國網(wang)冀北電(dian)力有(you)限(xian)(xian)公(gong)司和國網(wang)河北省電(dian)力有(you)限(xian)(xian)公(gong)司克(ke)服施(shi)工(gong)(gong)(gong)(gong)難(nan)度高、有(you)效工(gong)(gong)(gong)(gong)期短、防(fang)疫防(fang)控壓力大等(deng)困難(nan)，協調(diao)各地方政府、參加單(dan)位，及時處理(li)施(shi)工(gong)(gong)(gong)(gong)中的(de)各項問題(ti)，確保(bao)工(gong)(gong)(gong)(gong)程(cheng)順利貫通。

作為(wei)華北(bei)區(qu)域特高壓電(dian)網成(cheng)環成(cheng)網的重(zhong)要組成(cheng)部分(fen)與國家(jia)電(dian)網有(you)限公司“新基建”工(gong)程(cheng)中(zhong)的重(zhong)點(dian)電(dian)網工(gong)程(cheng)，張北(bei)—雄安(an)(an)1000千伏特高壓交流輸(shu)變電(dian)工(gong)程(cheng)依托遠(yuan)距(ju)離(li)、大容量的特高壓交流輸(shu)電(dian)技術，將(jiang)張家(jia)口地區(qu)富(fu)足清(qing)潔(jie)電(dian)能(neng)輸(shu)送(song)(song)至雄安(an)(an)新區(qu)負荷中(zhong)心，避免加重(zhong)北(bei)京500千伏環網“北(bei)電(dian)南送(song)(song)”潮流穿越，建成(cheng)投運后，每年將(jiang)為(wei)雄安(an)(an)新區(qu)輸(shu)送(song)(song)70億千瓦時(shi)以(yi)上的清(qing)潔(jie)能(neng)源，為(wei)實現雄安(an)(an)新區(qu)100%清(qing)潔(jie)能(neng)源供電(dian)。