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海上風電-中電投大豐H3#300MW海上風電場陸上集控中心SVG

據中央電(dian)(dian)視臺(tai)報道，2018年12月25日13時21分(fen)，隨著第57號風(feng)(feng)機的成功(gong)并網，國家電(dian)(dian)投(tou)(tou)大豐H3海(hai)上(shang)風(feng)(feng)電(dian)(dian)項(xiang)目(mu)72臺(tai)風(feng)(feng)機順利實現(xian)全容量投(tou)(tou)產并網。標(biao)志(zhi)著我(wo)國離岸(an)最遠的海(hai)上(shang)風(feng)(feng)電(dian)(dian)場正式投(tou)(tou)入運營(ying)；標(biao)志(zhi)著該項(xiang)目(mu)順利實現(xian)全容量并網，創下(xia)了(le)電(dian)(dian)力行業內同等(deng)規模海(hai)上(shang)風(feng)(feng)電(dian)(dian)項(xiang)目(mu)建設及投(tou)(tou)運在當年開工、當年建成、當年收益(yi)的三項(xiang)紀錄(lu)。也為我(wo)國在深海(hai)領域(yu)發展(zhan)大容量、大規模海(hai)上(shang)風(feng)(feng)電(dian)(dian)積(ji)累了(le)寶貴經(jing)驗(yan)。

風電場抑制次同步振蕩的典型應用-新疆天電三塘湖

當前大(da)規模(mo)風(feng)(feng)(feng)電(dian)(dian)(dian)場(chang)(chang)由數(shu)百臺(tai)(tai)甚(shen)至(zhi)數(shu)千臺(tai)(tai)風(feng)(feng)(feng)電(dian)(dian)(dian)機(ji)組(zu)組(zu)成，它們類(lei)型(xing)多樣（雙饋風(feng)(feng)(feng)電(dian)(dian)(dian)機(ji)組(zu)、鼠籠(long)式(shi)風(feng)(feng)(feng)電(dian)(dian)(dian)機(ji)組(zu)、直(zhi)驅風(feng)(feng)(feng)電(dian)(dian)(dian)機(ji)組(zu)等），控制參數(shu)各(ge)異，而且(qie)運(yun)行方式(shi)各(ge)不相同。風(feng)(feng)(feng)電(dian)(dian)(dian)場(chang)(chang)大(da)多地處(chu)偏遠(yuan)地區，遠(yuan)離負荷中(zhong)心，其并網(wang)點短路比(SCR)隨著風(feng)(feng)(feng)電(dian)(dian)(dian)機(ji)組(zu)并網(wang)數(shu)量(liang)的增加而降低，形(xing)成弱交(jiao)流系統。同時，大(da)規模(mo)風(feng)(feng)(feng)電(dian)(dian)(dian)場(chang)(chang)常采用高壓直(zhi)流輸電(dian)(dian)(dian)（HVDC）技(ji)術(shu)或串(chuan)聯補(bu)償(chang)技(ji)術(shu)實(shi)現遠(yuan)距離外(wai)送。相關研(yan)究(jiu)表明，當風(feng)(feng)(feng)電(dian)(dian)(dian)場(chang)(chang)并入(ru)弱交(jiao)流系統、含串(chuan)聯補(bu)償(chang)系統，以及HVDC系統時，均可能發生(sheng)次同步振蕩。

用于電弧爐負載補償——福建華安水力發電廠變電站

福(fu)建省華安水(shui)電(dian)(dian)(dian)廠電(dian)(dian)(dian)力(li)發(fa)展(zhan)公司35kV金山2#變(bian)電(dian)(dian)(dian)站10kV母線接(jie)有(you)裕興Ⅰ、Ⅱ、Ⅲ、Ⅳ路4條饋線，供(gong)華易鑫鐵廠負荷，其(qi)中(zhong)裕興Ⅰ、Ⅱ路分別供(gong)兩臺(tai)(tai)容量(liang)為(wei)8000kVA電(dian)(dian)(dian)弧(hu)爐(lu)，裕興Ⅲ路供(gong)一(yi)臺(tai)(tai)容量(liang)為(wei)4000kVA精(jing)煉(lian)爐(lu)，裕興Ⅳ路供(gong)一(yi)臺(tai)(tai)容量(liang)630kVA動力(li)變(bian)及(ji)5000kVA無功(gong)補(bu)償裝置。正常生(sheng)產時，兩臺(tai)(tai)電(dian)(dian)(dian)弧(hu)爐(lu)和精(jing)煉(lian)爐(lu)會(hui)同時生(sheng)產。

因(yin)為電(dian)弧(hu)爐工作(zuo)時會(hui)產(chan)生(sheng)很大(da)無功(gong)(gong)(gong)沖擊，會(hui)使電(dian)網(wang)公共(gong)母線上產(chan)生(sheng)較大(da)的(de)無功(gong)(gong)(gong)變動(dong)，且會(hui)產(chan)生(sheng)不規(gui)則的(de)低次諧波，對離此(ci)負荷較近的(de)水力發電(dian)廠設備產(chan)生(sheng)較大(da)影(ying)響。現場反饋電(dian)弧(hu)爐工作(zuo)時，水力發電(dian)機(ji)組(zu)(zu)的(de)有(you)功(gong)(gong)(gong)功(gong)(gong)(gong)率波動(dong)達(da)6MW~7MW，有(you)功(gong)(gong)(gong)功(gong)(gong)(gong)率的(de)快(kuai)速波動(dong)可(ke)能(neng)導致機(ji)組(zu)(zu)振動(dong)，對機(ji)組(zu)(zu)的(de)長期穩定運行有(you)著極大(da)危害。