文章來源：中國能源建設集團(tuan)有限公司 發布時間：2017-11-09
11月3日，由中國能建江蘇(su)院(yuan)承擔(dan)設(she)計的江蘇(su)蘇(su)州南(nan)部(bu)電(dian)網500千(qian)(qian)伏(fu)統一(yi)潮流控制器（英文簡稱(cheng)“UPFC”）示范工(gong)程正(zheng)式開(kai)工(gong)建設(she)。這是(shi)該院(yuan)在2015年成(cheng)功設(she)計南(nan)京西(xi)環網220千(qian)(qian)伏(fu)UPFC示范工(gong)程的基礎上，向世界上電(dian)壓等(deng)級最(zui)高、容量最(zui)大(da)的UPFC工(gong)程發(fa)起(qi)的又一(yi)次成(cheng)功挑戰。
隨著電(dian)(dian)網潮流(liu)的(de)(de)涌動，如果某些區(qu)域(yu)用電(dian)(dian)激增，可能造成輸電(dian)(dian)線路(lu)的(de)(de)超負荷運轉。UPFC就是通過控(kong)制(zhi)所有(you)影響輸電(dian)(dian)線路(lu)潮流(liu)的(de)(de)參(can)數，為輸電(dian)(dian)通道加裝(zhuang)一套“智能交通導航儀”，疏導電(dian)(dian)力“交通”，從而實(shi)現(xian)對(dui)電(dian)(dian)網潮流(liu)的(de)(de)靈活、精準控(kong)制(zhi)，在(zai)現(xian)有(you)網架基礎(chu)上(shang)保(bao)障(zhang)電(dian)(dian)網安全運行。
據悉，該工(gong)程之所以(yi)選(xuan)址蘇(su)(su)州，是因(yin)為蘇(su)(su)州南部電(dian)(dian)(dian)網(wang)(wang)(wang)的±800千伏錦蘇(su)(su)直流(liu)特(te)高壓(ya)輸電(dian)(dian)(dian)傳輸的是來(lai)自四川錦屏的清潔水電(dian)(dian)(dian)。由于水電(dian)(dian)(dian)季(ji)節性較強，導致該地存在著(zhu)夏季(ji)直流(liu)雙極(ji)閉鎖后應(ying)急拉限電(dian)(dian)(dian)多、冬季(ji)直流(liu)來(lai)電(dian)(dian)(dian)小(xiao)方式下受(shou)不(bu)滿(man)、動態無功支撐不(bu)足等問題。若采取新增輸電(dian)(dian)(dian)通道(dao)、線路(lu)導線增容等常(chang)規措施，將帶來(lai)投資高、建(jian)設困難(nan)、安全風(feng)險大等缺(que)陷，而在蘇(su)(su)州南部電(dian)(dian)(dian)網(wang)(wang)(wang)試點建(jian)設的500千伏UPFC應(ying)用(yong)不(bu)僅能(neng)夠解決(jue)上述電(dian)(dian)(dian)網(wang)(wang)(wang)問題，還能(neng)避免常(chang)規措施所存在的弊端。
該(gai)工(gong)程(cheng)(cheng)被列為國家電(dian)(dian)(dian)(dian)網(wang)公司2016年度五大(da)重大(da)示范工(gong)程(cheng)(cheng)之(zhi)一，換(huan)流器容量(liang)(liang)達3×25萬千伏(fu)安(an)，建(jian)成(cheng)(cheng)后(hou)將成(cheng)(cheng)為世界上電(dian)(dian)(dian)(dian)壓等級最高(gao)(gao)、容量(liang)(liang)最大(da)的(de)UPFC工(gong)程(cheng)(cheng)，也是自南京西環(huan)網(wang)220千伏(fu)UPFC工(gong)程(cheng)(cheng)之(zhi)后(hou)世界第(di)二個采(cai)用(yong)基于(yu)IGBT的(de)模塊化多電(dian)(dian)(dian)(dian)平換(huan)流器（MMC）的(de)UPFC工(gong)程(cheng)(cheng)，具(ju)有可(ke)靠性高(gao)(gao)、損(sun)耗小、占(zhan)地面積(ji)小、維護方便等諸多優(you)點，且工(gong)程(cheng)(cheng)采(cai)用(yong)的(de)設備、技術均由我國自主設計、研(yan)發(fa)和(he)(he)建(jian)設。該(gai)工(gong)程(cheng)(cheng)將使蘇(su)州(zhou)電(dian)(dian)(dian)(dian)網(wang)消(xiao)納清(qing)潔能(neng)源的(de)能(neng)力提升(sheng)約120萬千瓦，同時(shi)將進一步提高(gao)(gao)蘇(su)州(zhou)南部500千伏(fu)電(dian)(dian)(dian)(dian)網(wang)對特高(gao)(gao)壓交直流來(lai)電(dian)(dian)(dian)(dian)的(de)承接能(neng)力，有力地保障區域(yu)性電(dian)(dian)(dian)(dian)網(wang)輸(shu)電(dian)(dian)(dian)(dian)能(neng)力和(he)(he)安(an)全(quan)穩定水平，從(cong)而(er)推動我國電(dian)(dian)(dian)(dian)網(wang)從(cong)傳統電(dian)(dian)(dian)(dian)網(wang)向安(an)全(quan)、高(gao)(gao)效、經濟(ji)、清(qing)潔、互動現代電(dian)(dian)(dian)(dian)網(wang)的(de)升(sheng)級和(he)(he)跨越。