文章來源：中(zhong)國(guo)南方電網(wang)有限(xian)責任(ren)公司 發布時間：2016-07-14
截(jie)至2015年7月9日，國家(jia)西電(dian)(dian)東(dong)(dong)送重(zhong)點(dian)工程(cheng)、黔電(dian)(dian)送粵第一(yi)條直流輸電(dian)(dian)通道——±500千(qian)伏貴廣一(yi)回直流輸電(dian)(dian)工程(cheng)實(shi)現(xian)安全運行11年，累計向廣東(dong)(dong)送電(dian)(dian)量1500.3億千(qian)瓦時(shi)；其中，今年以(yi)來送電(dian)(dian)量達92.7億千(qian)瓦時(shi)，同(tong)比增長(chang)58%，為保(bao)障廣東(dong)(dong)電(dian)(dian)力供(gong)應提供(gong)了有(you)力支撐。
該工程是落實國家“十五(wu)”末期“西電(dian)(dian)東(dong)(dong)(dong)(dong)送(song)(song)”新增向(xiang)廣東(dong)(dong)(dong)(dong)送(song)(song)電(dian)(dian)1000萬千(qian)瓦(wa)的(de)重點(dian)項(xiang)目(mu)，也(ye)是南方電(dian)(dian)網第一條300萬千(qian)瓦(wa)的(de)直流輸電(dian)(dian)工程。工程西起(qi)貴州安順，東(dong)(dong)(dong)(dong)至廣東(dong)(dong)(dong)(dong)肇慶，送(song)(song)電(dian)(dian)容量300萬千(qian)瓦(wa)，線路全長882公(gong)里；于2004年5月(yue)31日、9月(yue)24日先后(hou)實現單極(ji)(ji)投(tou)運和雙極(ji)(ji)投(tou)運。
自工(gong)程投運(yun)(yun)以來(lai)，南方電(dian)(dian)網(wang)公司科學抓好電(dian)(dian)網(wang)風險(xian)閉環管控，持續開展設(she)備(bei)隱患整治，有(you)效保障了(le)工(gong)程穩定(ding)運(yun)(yun)行。2014年，該直流輸電(dian)(dian)線(xian)路能量可利用率達到98.79%，優于全國(guo)平均(jun)值(zhi)（93.84%）。公司成功研制500千伏貴廣直流保護定(ding)檢(jian)系統，提高檢(jian)修(xiu)維護效率達10倍以上(shang)；為國(guo)內大(da)直流工(gong)程運(yun)(yun)維積累了(le)豐富經驗，對(dui)超高壓輸電(dian)(dian)相關技術發展具有(you)積極的促進作(zuo)用。