本文關(guān)鍵詞：雙饋感應(yīng)發(fā)電機(jī)接入電網(wǎng)的三相短路電流峰值評(píng)估　出處：《電力系統(tǒng)自動(dòng)化》2014年18期 　論文類型：期刊論文

  更多相關(guān)文章： 雙饋感應(yīng)發(fā)電機(jī) 靜態(tài)等值電路 撬棒電阻 轉(zhuǎn)速 短路電流峰值

【摘要】：短路電流計(jì)算是電網(wǎng)規(guī)劃和保護(hù)的基礎(chǔ),文中將雙饋感應(yīng)發(fā)電機(jī)(DFIG)定子磁鏈強(qiáng)制分量歸算至定子側(cè),將定子磁鏈直流分量歸算至轉(zhuǎn)子側(cè),形成靜態(tài)等值電路,分析轉(zhuǎn)子感應(yīng)磁鏈隨轉(zhuǎn)速的變化規(guī)律,研究轉(zhuǎn)子電阻對(duì)故障時(shí)定子磁鏈直流分量動(dòng)態(tài)衰減及其與轉(zhuǎn)子繞組感應(yīng)過(guò)程的影響,推導(dǎo)電網(wǎng)三相短路時(shí)DFIG定子短路電流解析式。比較了近端和遠(yuǎn)端故障時(shí)不同撬棒電阻對(duì)應(yīng)定子短路電流特性,提出了DFIG接入電網(wǎng)的三相短路電流峰值評(píng)估方法。該方法能有效計(jì)算DFIG機(jī)端、饋線上下游和其他饋線故障時(shí)的三相短路電流峰值序列,采用MATLAB/Simulink軟件仿真驗(yàn)證了所提出方法的正確性。
[Abstract]:Short circuit current calculation is the basis of power grid planning and protection, the doubly fed induction generator (DFIG) stator flux forced component reduction to the stator, the stator flux of DC component reduction to the rotor side, forming a static equivalent circuit analysis of rotor flux variations with the rotational speed of the rotor resistance of stator fault the flux of DC component of dynamic attenuation and its influence and the rotor winding of the induction process, derived when three-phase short-circuit fault DFIG stator short-circuit current formula. Comparison of the proximal and distal faults of different corresponding stator crowbar resistance short-circuit current characteristics, method of three-phase short-circuit current peak grid DFIG evaluation is proposed. This method can effectively calculate the DFIG machine at the end of the peak, three-phase short-circuit current series feeder and other downstream feeder fault, verify the correctness of the proposed method by MATLAB/Simulink simulation software.

【作者單位】： 輸配電裝備及系統(tǒng)安全與新技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室 重慶大學(xué);廣東電網(wǎng)公司珠海供電局;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51277184) 國(guó)家高技術(shù)研究發(fā)展計(jì)劃(863計(jì)劃)資助項(xiàng)目(2011AA05A107)~~
【分類號(hào)】：TM31
【正文快照】： 0引言雙饋感應(yīng)發(fā)電機(jī)(doubly-fed inductiongenerator,DFIG)以其靈活的控制性能,在風(fēng)力發(fā)電系統(tǒng)中應(yīng)用廣泛。電網(wǎng)短路時(shí)DFIG機(jī)端電壓下降,在定子繞組產(chǎn)生沖擊電流,對(duì)于大部分商用DFIG機(jī)組,須在轉(zhuǎn)子側(cè)接入合適的撬棒電阻,以保護(hù)DFIG和實(shí)現(xiàn)低電壓穿越運(yùn)行[1-2]。短路電流計(jì)算是

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1 高滿茹;;低壓大功率異步電動(dòng)機(jī)對(duì)三相短路電流的影響[J];建筑電氣;2010年03期

2 王玉卿;王振聲;王莉;;大型數(shù)據(jù)中心低壓柴油發(fā)電機(jī)組配電系統(tǒng)短路電流計(jì)算[J];智能建筑電氣技術(shù);2007年01期

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本文編號(hào)：1414426