文章來源：國家電(dian)網公司 發布時間：2009-01-23
從1月11日起，湖南明顯降溫，持續(xu)低(di)溫、陰雨、霧雪、冰凍(dong)天氣(qi)，導致電網輸(shu)變電設施大面(mian)積覆冰，特別(bie)是高寒山區(qu)輸(shu)電線路連日冰凍(dong)，對電網安全構(gou)成了(le)嚴重威脅。
截至1月(yue)21日(ri)早(zao)上6點，受(shou)冰凍影響，全省(sheng)220千伏(fu)(fu)主要(yao)輸電(dian)(dian)(dian)(dian)(dian)(dian)(dian)線(xian)路共跳閘(zha)16條(tiao)(tiao)次(ci)，500千伏(fu)(fu)“電(dian)(dian)(dian)(dian)(dian)(dian)(dian)力高速公路”跳閘(zha)17條(tiao)(tiao)次(ci)，三峽、葛洲壩送(song)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)湖(hu)南和省(sheng)內西電(dian)(dian)(dian)(dian)(dian)(dian)(dian)東送(song)通道中的12條(tiao)(tiao)500千伏(fu)(fu)線(xian)路處(chu)于停(ting)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀態，500千伏(fu)(fu)株洲云田變電(dian)(dian)(dian)(dian)(dian)(dian)(dian)站處(chu)于停(ting)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀態，500千伏(fu)(fu)長沙艾家沖、湘潭鶴嶺、益陽復興、岳陽昆山、懷化牌樓(lou)等變電(dian)(dian)(dian)(dian)(dian)(dian)(dian)站和12座220千伏(fu)(fu)骨(gu)干變電(dian)(dian)(dian)(dian)(dian)(dian)(dian)站覆冰嚴重，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)網結構、安(an)全運行受(shou)到巨(ju)大沖擊(ji)，面臨(lin)著嚴峻考(kao)驗。
此(ci)次冰(bing)(bing)凍來(lai)勢兇(xiong)猛，覆蓋面(mian)積(ji)廣，持續時(shi)(shi)間(jian)長，為湖南近30年來(lai)之最(zui)。大(da)雪(xue)冰(bing)(bing)凍天氣中，不僅(jin)雪(xue)霜結冰(bing)(bing)，而(er)且(qie)在下雪(xue)間(jian)隙，連(lian)下雨都(dou)出現(xian)(xian)邊(bian)吹風邊(bian)結冰(bing)(bing)現(xian)(xian)象(xiang)。跨越山區的(de)輸電線(xian)(xian)路、塔桿上(shang)(shang)的(de)冰(bing)(bing)層就(jiu)像電焊(han)焊(han)上(shang)(shang)去(qu)的(de)一樣堅硬，像玻璃一樣光滑。部分(fen)地區的(de)線(xian)(xian)路出現(xian)(xian)了(le)40～60毫米厚的(de)覆冰(bing)(bing)，遠遠超出了(le)15～30毫米的(de)設(she)計值。冰(bing)(bing)凍嚴重(zhong)時(shi)(shi)，覆冰(bing)(bing)厚度每(mei)小時(shi)(shi)增加(jia)1毫米。拖著沉(chen)重(zhong)的(de)冰(bing)(bing)凌(ling)，很多線(xian)(xian)路出現(xian)(xian)了(le)大(da)幅度舞(wu)動。如果不及時(shi)(shi)融冰(bing)(bing)除冰(bing)(bing)，“共振(zhen)”效(xiao)應足以拉倒重(zhong)達幾十噸(dun)的(de)鋼(gang)制(zhi)塔架，造成斷線(xian)(xian)停電、局部電網崩(beng)潰甚(shen)至大(da)面(mian)積(ji)停電。
災情出現后，湖南省電力公(gong)司立即(ji)啟(qi)動了(le)預警和應急機制，把(ba)維護電網(wang)安(an)(an)全(quan)穩定運行(xing)(xing)(xing)作為(wei)當前(qian)壓倒一(yi)切的(de)首要任務(wu)，全(quan)力保(bao)障全(quan)省生(sheng)產和人民生(sheng)活用(yong)電。一(yi)方面(mian)，盡力安(an)(an)排主要線(xian)(xian)路的(de)正常融冰，加強冰情監(jian)視和線(xian)(xian)路巡視，確(que)保(bao)線(xian)(xian)路安(an)(an)全(quan)運行(xing)(xing)(xing)。另一(yi)方面(mian)，緊(jin)急動員8000多職(zhi)工，對高寒(han)山(shan)區覆冰嚴重(zhong)但又(you)無法(fa)正常融冰的(de)線(xian)(xian)路全(quan)線(xian)(xian)出擊，進行(xing)(xing)(xing)人工登(deng)桿除(chu)冰。
湖南(nan)省電(dian)(dian)(dian)力(li)公司(si)黨組(zu)(zu)書記、總(zong)經(jing)理(li)李維建，副總(zong)經(jing)理(li)黃強(qiang)、陳(chen)建平、徐(xu)云等，多次奔赴一(yi)線(xian)現(xian)(xian)場指揮抗冰(bing)保電(dian)(dian)(dian)工(gong)(gong)作。在(zai)株洲、湘潭、益陽、婁底、張家(jia)界、常德、岳陽和湘西等降雪冰(bing)凍(dong)中(zhong)心(xin)區，很(hen)多電(dian)(dian)(dian)力(li)職工(gong)(gong)在(zai)深山中(zhong)趟著齊膝深的(de)積雪，即(ji)使(shi)臉凍(dong)得發紫(zi)，手腳不聽使(shi)喚(huan)，但仍夜以繼日地(di)巡(xun)線(xian)、除冰(bing)，力(li)爭盡快搶修(xiu)被(bei)冰(bing)凍(dong)損害(hai)的(de)供電(dian)(dian)(dian)設施，防止沒有受損的(de)線(xian)路因冰(bing)凍(dong)遭受損害(hai)。同時(shi)，省電(dian)(dian)(dian)力(li)公司(si)還(huan)安排了從(cong)省市(shi)、縣(xian)鄉到農村供電(dian)(dian)(dian)所的(de)24小(xiao)時(shi)值班(ban)，設置了冰(bing)情(qing)監(jian)視固(gu)定(ding)哨和流動哨，冰(bing)情(qing)2小(xiao)時(shi)一(yi)報，由精干人員組(zu)(zu)成的(de)應急搶險隊隨時(shi)待命，做(zuo)到哪(na)(na)里出(chu)現(xian)(xian)險情(qing)哪(na)(na)里就(jiu)有人搶修(xiu)。由于(yu)電(dian)(dian)(dian)力(li)職工(gong)(gong)的(de)艱苦奮戰、頑(wan)強(qiang)拼搏(bo)，目(mu)前已使(shi)多條冰(bing)凍(dong)嚴重的(de)輸電(dian)(dian)(dian)線(xian)路轉危(wei)為安。
據氣象部門預測，未來幾天湖南還可能持續高強度降雪、冰凍天氣。針對電網面臨的緊急情況，省經委呼吁全社會團結一致、顧全大局，同舟共濟、克服自然災害帶來的暫時困難，要求認真落實有序用電方案，優先保證人民生活和重要部門、重要場所、重要用戶的供電。