文章來(lai)源：國家電網公司(si) 發(fa)布時間：2012-04-11
3月25日，國家電(dian)(dian)(dian)網(wang)公司所屬的(de)國家能(neng)源大型風電(dian)(dian)(dian)并網(wang)系(xi)統研(yan)發（實驗(yan)(yan)）中(zhong)心(xin)張北風電(dian)(dian)(dian)試(shi)驗(yan)(yan)基(ji)(ji)地(di)(di)，順利完成1號(hao)風電(dian)(dian)(dian)機(ji)組低(di)電(dian)(dian)(dian)壓(ya)穿越測(ce)試(shi)的(de)所有測(ce)試(shi)項(xiang)目。張北風電(dian)(dian)(dian)試(shi)驗(yan)(yan)基(ji)(ji)地(di)(di)是目前國內唯一具備開展低(di)電(dian)(dian)(dian)壓(ya)穿越試(shi)驗(yan)(yan)、可對(dui)風電(dian)(dian)(dian)機(ji)組進行電(dian)(dian)(dian)網(wang)適應(ying)性檢測(ce)的(de)試(shi)驗(yan)(yan)基(ji)(ji)地(di)(di)。
低(di)電(dian)(dian)壓穿越是指當電(dian)(dian)網故障或擾動引(yin)起風(feng)電(dian)(dian)場并網點的電(dian)(dian)壓跌(die)落(luo)時，在一定的電(dian)(dian)壓跌(die)落(luo)范圍內，風(feng)電(dian)(dian)機(ji)組(zu)(zu)(zu)能夠不間斷并網運行。在本次測(ce)(ce)(ce)試(shi)(shi)期間，技術人員分別嚴(yan)格測(ce)(ce)(ce)試(shi)(shi)了該機(ji)組(zu)(zu)(zu)在多重條(tiao)件組(zu)(zu)(zu)合環境下的低(di)電(dian)(dian)壓穿越表現，包(bao)括小(xiao)功率輸出(chu)、大功率輸出(chu)、電(dian)(dian)網三相短(duan)路、相間短(duan)路以(yi)及不同(tong)電(dian)(dian)壓跌(die)落(luo)深(shen)度（20%、35%、50%、75%和(he)90%）等20余種(zhong)組(zu)(zu)(zu)合環境的近百次測(ce)(ce)(ce)試(shi)(shi)。他們科(ke)學安排測(ce)(ce)(ce)試(shi)(shi)計(ji)劃，嚴(yan)格遵(zun)守測(ce)(ce)(ce)試(shi)(shi)流程(cheng)，積極幫助制造商(shang)調試(shi)(shi)和(he)改(gai)善(shan)風(feng)機(ji)性能。
風(feng)(feng)(feng)(feng)(feng)(feng)電(dian)機組低電(dian)壓(ya)穿(chuan)越能力包括三(san)項重(zhong)要指標：風(feng)(feng)(feng)(feng)(feng)(feng)電(dian)場并網點電(dian)壓(ya)跌至(zhi)20%標稱電(dian)壓(ya)時，風(feng)(feng)(feng)(feng)(feng)(feng)電(dian)場內的(de)(de)風(feng)(feng)(feng)(feng)(feng)(feng)電(dian)機組能夠(gou)保證不脫(tuo)網連(lian)續運(yun)行625毫(hao)秒(miao)；風(feng)(feng)(feng)(feng)(feng)(feng)電(dian)場并網點電(dian)壓(ya)在發生跌落后(hou)2秒(miao)內能夠(gou)恢(hui)(hui)復(fu)到標稱電(dian)壓(ya)的(de)(de)90%時，風(feng)(feng)(feng)(feng)(feng)(feng)電(dian)場內的(de)(de)風(feng)(feng)(feng)(feng)(feng)(feng)電(dian)機組能夠(gou)保證不脫(tuo)網連(lian)續運(yun)行；風(feng)(feng)(feng)(feng)(feng)(feng)電(dian)機組有功(gong)功(gong)率在故(gu)障清(qing)(qing)除后(hou)應快速(su)恢(hui)(hui)復(fu)，自故(gu)障清(qing)(qing)除時刻開始，能以(yi)至(zhi)少10％額定功(gong)率秒(miao)的(de)(de)功(gong)率變化率恢(hui)(hui)復(fu)至(zhi)故(gu)障前的(de)(de)值。
經各方(fang)共同努力，1號(hao)風電機組(zu)(zu)的各項性能指標均滿足(zu)國家電網公司企業標準對低電壓穿(chuan)越能力的要(yao)求，順利通過了風電機組(zu)(zu)低電壓穿(chuan)越現場測試。