文章來源：中國能源建設集團有限公司 發布時間：2017-11-09
11月3日，由中國能建江(jiang)蘇院承(cheng)擔設計的江(jiang)蘇蘇州南部電(dian)網(wang)500千(qian)伏統一潮(chao)流控制器（英文簡稱“UPFC”）示范工(gong)程正式(shi)開(kai)工(gong)建設。這是該院在2015年成功設計南京西環(huan)網(wang)220千(qian)伏UPFC示范工(gong)程的基礎上，向世界上電(dian)壓等級(ji)最(zui)高、容(rong)量最(zui)大的UPFC工(gong)程發起(qi)的又(you)一次(ci)成功挑戰。
隨著電網潮流的(de)涌動(dong)，如果某些區域用(yong)電激增，可能(neng)造成(cheng)輸電線路(lu)的(de)超(chao)負荷運轉。UPFC就是通(tong)過控制所有影響輸電線路(lu)潮流的(de)參數，為輸電通(tong)道加裝一套“智能(neng)交通(tong)導航(hang)儀”，疏導電力“交通(tong)”，從而實現對電網潮流的(de)靈活、精準控制，在現有網架(jia)基礎(chu)上保障電網安全(quan)運行(xing)。
據悉(xi)，該工程之(zhi)所(suo)以選址蘇(su)州(zhou)(zhou)，是(shi)因為蘇(su)州(zhou)(zhou)南部電(dian)(dian)網的±800千伏錦蘇(su)直(zhi)流(liu)特高壓輸電(dian)(dian)傳輸的是(shi)來自四川錦屏的清潔水(shui)電(dian)(dian)。由于水(shui)電(dian)(dian)季節(jie)性較(jiao)強，導(dao)致該地存(cun)(cun)在(zai)(zai)著夏季直(zhi)流(liu)雙(shuang)極閉鎖后應(ying)急拉限(xian)電(dian)(dian)多、冬季直(zhi)流(liu)來電(dian)(dian)小方式下(xia)受(shou)不(bu)(bu)滿、動態無功支撐(cheng)不(bu)(bu)足等(deng)(deng)問題(ti)。若采取新增(zeng)輸電(dian)(dian)通(tong)道、線路(lu)導(dao)線增(zeng)容等(deng)(deng)常規措施(shi)，將帶來投資高、建設(she)困難(nan)、安全(quan)風險大(da)等(deng)(deng)缺陷，而在(zai)(zai)蘇(su)州(zhou)(zhou)南部電(dian)(dian)網試點建設(she)的500千伏UPFC應(ying)用不(bu)(bu)僅能夠解決上述(shu)電(dian)(dian)網問題(ti)，還能避免常規措施(shi)所(suo)存(cun)(cun)在(zai)(zai)的弊(bi)端。
該(gai)工(gong)(gong)(gong)程(cheng)被列為(wei)國家電(dian)(dian)(dian)(dian)(dian)網公(gong)司2016年度(du)五大(da)(da)重大(da)(da)示范工(gong)(gong)(gong)程(cheng)之一，換流器容(rong)量達3×25萬千(qian)(qian)伏(fu)安，建成后(hou)將成為(wei)世(shi)界上電(dian)(dian)(dian)(dian)(dian)壓等級最高、容(rong)量最大(da)(da)的(de)UPFC工(gong)(gong)(gong)程(cheng)，也是(shi)自南京西環網220千(qian)(qian)伏(fu)UPFC工(gong)(gong)(gong)程(cheng)之后(hou)世(shi)界第二個采用基于IGBT的(de)模塊化多電(dian)(dian)(dian)(dian)(dian)平換流器（MMC）的(de)UPFC工(gong)(gong)(gong)程(cheng)，具有(you)可靠性高、損(sun)耗(hao)小、占地面(mian)積小、維護方便(bian)等諸多優點，且(qie)工(gong)(gong)(gong)程(cheng)采用的(de)設(she)備、技術均由我國自主設(she)計、研發和(he)建設(she)。該(gai)工(gong)(gong)(gong)程(cheng)將使(shi)蘇州電(dian)(dian)(dian)(dian)(dian)網消納清(qing)潔能源(yuan)的(de)能力(li)(li)提升約(yue)120萬千(qian)(qian)瓦，同時將進(jin)一步提高蘇州南部500千(qian)(qian)伏(fu)電(dian)(dian)(dian)(dian)(dian)網對特高壓交直流來電(dian)(dian)(dian)(dian)(dian)的(de)承接能力(li)(li)，有(you)力(li)(li)地保障區域(yu)性電(dian)(dian)(dian)(dian)(dian)網輸電(dian)(dian)(dian)(dian)(dian)能力(li)(li)和(he)安全(quan)穩定水(shui)平，從(cong)而(er)推動(dong)(dong)我國電(dian)(dian)(dian)(dian)(dian)網從(cong)傳統(tong)電(dian)(dian)(dian)(dian)(dian)網向安全(quan)、高效、經濟、清(qing)潔、互動(dong)(dong)現代電(dian)(dian)(dian)(dian)(dian)網的(de)升級和(he)跨越(yue)。