雙饋電機(jī)風(fēng)電場(chǎng)無(wú)功功率分析及控制策略

提出一種雙饋電機(jī)風(fēng)力發(fā)電系統(tǒng)無(wú)功極限的計(jì)算方法，該方法以雙饋電機(jī)風(fēng)電系統(tǒng)的功率關(guān)系為基礎(chǔ)，考慮了網(wǎng)側(cè)變換器在其功率允許范圍內(nèi)的無(wú)功發(fā)生能力，系統(tǒng)動(dòng)態(tài)無(wú)功極限為定子與網(wǎng)側(cè)變換器的無(wú)功極限之和。對(duì)雙饋電機(jī)風(fēng)電場(chǎng)在強(qiáng)電網(wǎng)無(wú)功調(diào)節(jié)中的應(yīng)用進(jìn)行了探討，提出雙饋電機(jī)風(fēng)電場(chǎng)對(duì)當(dāng)?shù)赜脩暨M(jìn)行就近無(wú)功補(bǔ)償?shù)牟呗?，并給出相應(yīng)的無(wú)功分配策略，包括風(fēng)電場(chǎng)各風(fēng)機(jī)之間以及單臺(tái)風(fēng)電機(jī)組定子和網(wǎng)側(cè)變換器之間的無(wú)功分配原則。雙饋電機(jī)風(fēng)電場(chǎng)在實(shí)現(xiàn)變速恒頻優(yōu)化運(yùn)行的同時(shí)，充分發(fā)揮了風(fēng)電機(jī)組和整個(gè)風(fēng)電場(chǎng)的無(wú)功處理能力，使其參與所連電網(wǎng)的無(wú)功調(diào)節(jié)。
Abstract: A method is proposed to calculate the reactive power limit of DFIG (doubly fed induction generator) wind
power generation system based on the power relationships of overall system. Considering the reactive power capacity of the
grid side converter, total reactive power includes reactive power of both stator and the converter. Reactive power regulation
application of DFIG wind farm in the grid has been studied. A reactive power compensation strategy for the local user using
DFIG wind farm has been developed and the distribution algorithms of reactive power demand are given which includes that
for distribution among DFIG wind power systems in the farm and that for distribution between stator and the grid side converter in one generation unit. With VSCF (variable speed and constant frequency) optimum operation of each generation unit, DFIG wind farm contributes to the reactive power regulation in the grid at its full reactive power capacity.
關(guān)鍵詞﹕風(fēng)力發(fā)電；雙饋電機(jī)；變速恒頻；無(wú)功功率極限；無(wú)功補(bǔ)償
Keywords: wind power generation system; doubly fed induction generator; variable speed and constant frequency;
reactive power limit; reactive power compensation