文章來源：國家電網公司 發布時間：2012-04-11
3月25日，國(guo)家電(dian)(dian)(dian)(dian)網(wang)公司所(suo)屬的國(guo)家能源大(da)型風(feng)(feng)(feng)電(dian)(dian)(dian)(dian)并(bing)網(wang)系(xi)統研發(fa)（實驗）中心張北(bei)風(feng)(feng)(feng)電(dian)(dian)(dian)(dian)試驗基(ji)地(di)，順利(li)完成1號風(feng)(feng)(feng)電(dian)(dian)(dian)(dian)機(ji)組低電(dian)(dian)(dian)(dian)壓穿(chuan)越測(ce)試的所(suo)有測(ce)試項(xiang)目。張北(bei)風(feng)(feng)(feng)電(dian)(dian)(dian)(dian)試驗基(ji)地(di)是目前國(guo)內(nei)唯(wei)一具備開展(zhan)低電(dian)(dian)(dian)(dian)壓穿(chuan)越試驗、可對風(feng)(feng)(feng)電(dian)(dian)(dian)(dian)機(ji)組進行電(dian)(dian)(dian)(dian)網(wang)適應性檢測(ce)的試驗基(ji)地(di)。
低電(dian)(dian)壓(ya)(ya)穿越(yue)(yue)是指(zhi)當電(dian)(dian)網(wang)故障或擾動引起風電(dian)(dian)場(chang)并網(wang)點的電(dian)(dian)壓(ya)(ya)跌落時，在一定的電(dian)(dian)壓(ya)(ya)跌落范圍(wei)內，風電(dian)(dian)機組能夠不間斷并網(wang)運(yun)行。在本(ben)次(ci)(ci)測試(shi)期間，技(ji)術人員分別(bie)嚴格測試(shi)了該(gai)機組在多重條(tiao)件組合環(huan)境(jing)下的低電(dian)(dian)壓(ya)(ya)穿越(yue)(yue)表現，包(bao)括小功(gong)率輸出、大功(gong)率輸出、電(dian)(dian)網(wang)三相(xiang)短路、相(xiang)間短路以及(ji)不同電(dian)(dian)壓(ya)(ya)跌落深(shen)度（20%、35%、50%、75%和(he)90%）等20余種(zhong)組合環(huan)境(jing)的近百次(ci)(ci)測試(shi)。他們科學安(an)排(pai)測試(shi)計劃，嚴格遵守測試(shi)流程，積極幫助制造(zao)商調(diao)試(shi)和(he)改善風機性能。
風電(dian)(dian)機組(zu)低電(dian)(dian)壓穿越(yue)能力包括三項重要指標(biao)：風電(dian)(dian)場并網(wang)點(dian)(dian)電(dian)(dian)壓跌(die)至(zhi)20%標(biao)稱電(dian)(dian)壓時，風電(dian)(dian)場內的(de)(de)風電(dian)(dian)機組(zu)能夠(gou)保(bao)證不(bu)脫網(wang)連續運(yun)(yun)行625毫秒；風電(dian)(dian)場并網(wang)點(dian)(dian)電(dian)(dian)壓在發生跌(die)落后2秒內能夠(gou)恢復(fu)(fu)到標(biao)稱電(dian)(dian)壓的(de)(de)90%時，風電(dian)(dian)場內的(de)(de)風電(dian)(dian)機組(zu)能夠(gou)保(bao)證不(bu)脫網(wang)連續運(yun)(yun)行；風電(dian)(dian)機組(zu)有功(gong)功(gong)率在故障清除(chu)后應快速恢復(fu)(fu)，自故障清除(chu)時刻開(kai)始，能以至(zhi)少(shao)10％額定功(gong)率秒的(de)(de)功(gong)率變(bian)化率恢復(fu)(fu)至(zhi)故障前的(de)(de)值。
經各(ge)方(fang)共(gong)同努力，1號風(feng)電(dian)機組的各(ge)項性能指標均滿足國(guo)家電(dian)網公司企(qi)業標準(zhun)對低電(dian)壓穿越能力的要(yao)求，順利通過了(le)風(feng)電(dian)機組低電(dian)壓穿越現場(chang)測試。