文章來源(yuan)：國家電網公(gong)司(si) 發(fa)布時間：2012-04-11
3月25日(ri)，國家電(dian)網公司所(suo)屬的(de)國家能源大型風(feng)電(dian)并網系統研發(fa)（實驗(yan)）中心張北(bei)風(feng)電(dian)試驗(yan)基地(di)，順利完成1號(hao)風(feng)電(dian)機組(zu)低電(dian)壓(ya)穿越測試的(de)所(suo)有測試項目(mu)。張北(bei)風(feng)電(dian)試驗(yan)基地(di)是目(mu)前國內唯一具備開展低電(dian)壓(ya)穿越試驗(yan)、可對風(feng)電(dian)機組(zu)進行(xing)電(dian)網適應(ying)性(xing)檢測的(de)試驗(yan)基地(di)。
低電(dian)(dian)(dian)壓穿越(yue)是指當電(dian)(dian)(dian)網故障或擾動引(yin)起風電(dian)(dian)(dian)場并(bing)網點的(de)(de)電(dian)(dian)(dian)壓跌落時，在一定的(de)(de)電(dian)(dian)(dian)壓跌落范(fan)圍內，風電(dian)(dian)(dian)機(ji)組能夠不間(jian)斷(duan)并(bing)網運行(xing)。在本次(ci)測試期間(jian)，技術人員(yuan)分(fen)別(bie)嚴格測試了該機(ji)組在多重(zhong)條件(jian)組合(he)環(huan)境(jing)下的(de)(de)低電(dian)(dian)(dian)壓穿越(yue)表現(xian)，包括(kuo)小(xiao)功(gong)率輸(shu)出、大功(gong)率輸(shu)出、電(dian)(dian)(dian)網三(san)相短路、相間(jian)短路以(yi)及不同電(dian)(dian)(dian)壓跌落深(shen)度（20%、35%、50%、75%和90%）等20余種組合(he)環(huan)境(jing)的(de)(de)近百次(ci)測試。他們科學安排測試計劃，嚴格遵守(shou)測試流程，積極幫助制造商調試和改(gai)善(shan)風機(ji)性能。
風(feng)電(dian)(dian)(dian)(dian)機(ji)組低(di)電(dian)(dian)(dian)(dian)壓(ya)(ya)穿越能(neng)(neng)力包括三項重要指標：風(feng)電(dian)(dian)(dian)(dian)場并(bing)網(wang)點電(dian)(dian)(dian)(dian)壓(ya)(ya)跌至20%標稱電(dian)(dian)(dian)(dian)壓(ya)(ya)時，風(feng)電(dian)(dian)(dian)(dian)場內的風(feng)電(dian)(dian)(dian)(dian)機(ji)組能(neng)(neng)夠(gou)保(bao)證(zheng)不(bu)脫(tuo)網(wang)連(lian)續運(yun)行625毫秒；風(feng)電(dian)(dian)(dian)(dian)場并(bing)網(wang)點電(dian)(dian)(dian)(dian)壓(ya)(ya)在發生跌落后(hou)2秒內能(neng)(neng)夠(gou)恢復(fu)到標稱電(dian)(dian)(dian)(dian)壓(ya)(ya)的90%時，風(feng)電(dian)(dian)(dian)(dian)場內的風(feng)電(dian)(dian)(dian)(dian)機(ji)組能(neng)(neng)夠(gou)保(bao)證(zheng)不(bu)脫(tuo)網(wang)連(lian)續運(yun)行；風(feng)電(dian)(dian)(dian)(dian)機(ji)組有功功率(lv)在故障清除(chu)后(hou)應快速恢復(fu)，自故障清除(chu)時刻開始(shi)，能(neng)(neng)以至少(shao)10％額定功率(lv)秒的功率(lv)變化(hua)率(lv)恢復(fu)至故障前的值。
經各(ge)方共同(tong)努力(li)，1號風電(dian)機(ji)組的各(ge)項性能指(zhi)標均滿足國家電(dian)網(wang)公司企業標準對(dui)低(di)電(dian)壓穿越(yue)能力(li)的要求(qiu)，順利通(tong)過(guo)了風電(dian)機(ji)組低(di)電(dian)壓穿越(yue)現場測(ce)試。