文章來源(yuan)：國家(jia)電(dian)網公司(si) 發布時間：2016-06-01
5月28日，國內首個“內橋”型接線雙回(hui)路供(gong)電(dian)(dian)的(de)110千伏移動變(bian)電(dian)(dian)站在浙江(jiang)杭(hang)州(zhou)110千伏五福變(bian)正(zheng)式投運，成(cheng)功(gong)應(ying)用于市區變(bian)電(dian)(dian)站改造升級工程。這座由五個白(bai)色(se)箱子組成(cheng)的(de)移動變(bian)電(dian)(dian)站，創新采用雙回(hui)路供(gong)電(dian)(dian)和插拔式電(dian)(dian)纜(lan)頭，提(ti)高(gao)了移動變(bian)電(dian)(dian)站的(de)供(gong)電(dian)(dian)可靠性和應(ying)急處理響應(ying)速(su)度。
隨著(zhu)杭(hang)州城區變(bian)(bian)電(dian)(dian)(dian)站(zhan)投運年份(fen)增加，老舊設(she)備隱患逐(zhu)步(bu)顯現(xian)，面臨的改(gai)造(zao)壓力與日俱增。由于城區負荷(he)相對集中(zhong)，負載(zai)率超(chao)過80%的變(bian)(bian)電(dian)(dian)(dian)站(zhan)較多，依托(tuo)現(xian)有(you)(you)電(dian)(dian)(dian)網轉移(yi)負荷(he)難度較大，即使部(bu)分變(bian)(bian)電(dian)(dian)(dian)站(zhan)可依托(tuo)配(pei)網轉移(yi)負荷(he)，改(gai)造(zao)期間(jian)配(pei)網也將(jiang)承受很大的運行壓力。改(gai)造(zao)期間(jian)非正常(chang)供(gong)電(dian)(dian)(dian)方式(shi)歷時較長，若發生(sheng)設(she)備或線路(lu)(lu)故障將(jiang)導(dao)致(zhi)整站(zhan)全停(ting)。而目前(qian)的移(yi)動(dong)變(bian)(bian)電(dian)(dian)(dian)站(zhan)主要(yao)應用于應急搶修，因(yin)此(ci)普遍(bian)采用“線變(bian)(bian)組”型(xing)，只有(you)(you)單(dan)回路(lu)(lu)供(gong)電(dian)(dian)(dian)。在110千(qian)伏進(jin)線發生(sheng)故障或遭遇(yu)外(wai)力破壞時，“線變(bian)(bian)組”型(xing)移(yi)動(dong)變(bian)(bian)電(dian)(dian)(dian)站(zhan)會失電(dian)(dian)(dian)，無法滿(man)足變(bian)(bian)電(dian)(dian)(dian)站(zhan)改(gai)造(zao)升級對供(gong)電(dian)(dian)(dian)可靠性(xing)的要(yao)求(qiu)。對此(ci)，杭(hang)州供(gong)電(dian)(dian)(dian)公(gong)司研發出110千(qian)伏“內(nei)橋”型(xing)移(yi)動(dong)式(shi)變(bian)(bian)電(dian)(dian)(dian)站(zhan)，一路(lu)(lu)電(dian)(dian)(dian)源如果失電(dian)(dian)(dian)，另一路(lu)(lu)電(dian)(dian)(dian)源立刻(ke)替補供(gong)電(dian)(dian)(dian)，大大提升了供(gong)電(dian)(dian)(dian)可靠性(xing)。
這座110千伏移(yi)動變(bian)電(dian)站(zhan)由車(che)(che)載(zai)式(shi)(shi)主(zhu)變(bian)、車(che)(che)載(zai)式(shi)(shi)GIS、車(che)(che)載(zai)式(shi)(shi)10千伏箱(xiang)(xiang)式(shi)(shi)柜、車(che)(che)載(zai)式(shi)(shi)綜自箱(xiang)(xiang)、移(yi)動式(shi)(shi)電(dian)源(yuan)箱(xiang)(xiang)五(wu)大單(dan)(dan)元組成。每個單(dan)(dan)元由平(ping)板車(che)(che)和(he)集裝箱(xiang)(xiang)拼接而成，箱(xiang)(xiang)內配置消防、安防、照明、通(tong)信等設施。投運后(hou)，可(ke)解決(jue)局部地區(qu)負(fu)荷(he)突發性增長、變(bian)電(dian)站(zhan)主(zhu)變(bian)過(guo)載(zai)問題，也可(ke)解決(jue)電(dian)網改造過(guo)程中停(ting)電(dian)改造、負(fu)荷(he)轉移(yi)問題，還(huan)能提升電(dian)網應急(ji)搶(qiang)修供電(dian)和(he)防震(zhen)減災的能力。
值得一(yi)(yi)提的(de)是，由(you)于移動變(bian)電(dian)(dian)站常(chang)用于應(ying)急搶修，而原有(you)的(de)電(dian)(dian)纜(lan)(lan)頭(tou)接(jie)線方(fang)式往往需要(yao)耗費大量的(de)時間(jian)，杭州供電(dian)(dian)公司在(zai)設計中特(te)別采用一(yi)(yi)次電(dian)(dian)纜(lan)(lan)插拔頭(tou)連接(jie)、二次電(dian)(dian)纜(lan)(lan)預插拔式接(jie)口連接(jie)技術(shu)，可(ke)短時完成安(an)(an)裝(zhuang)(zhuang)，提高安(an)(an)裝(zhuang)(zhuang)調試的(de)便捷性(xing)，大大提升電(dian)(dian)網的(de)響應(ying)速度和應(ying)急處置能力。