【摘要】：含柔性直流電網(wǎng)的交直流混聯(lián)系統(tǒng)中換流站功率參考值和下垂系數(shù)分別決定了換流站功率分配以及直流電壓與直流功率間的斜率控制關(guān)系,進(jìn)而決定了整個(gè)交直流混聯(lián)系統(tǒng)的潮流分布,因此功率參考值和下垂系數(shù)的選取至關(guān)重要。為此,提出一種含柔性直流電網(wǎng)的交直流混聯(lián)系統(tǒng)潮流優(yōu)化控制策略,對(duì)功率參考值和下垂系數(shù)進(jìn)行優(yōu)化,以實(shí)現(xiàn)系統(tǒng)網(wǎng)絡(luò)損耗和直流電壓偏差率綜合最小的目標(biāo)。首先,針對(duì)含柔性直流電網(wǎng)的交直流混聯(lián)系統(tǒng)建立了換流站模型、交流系統(tǒng)模型和直流電網(wǎng)模型,并建立了直流電網(wǎng)在主從運(yùn)行方式或下垂運(yùn)行方式下的控制方程統(tǒng)一表達(dá)式。然后,基于含柔性直流電網(wǎng)的交直流混聯(lián)系統(tǒng)最優(yōu)潮流,在線自適應(yīng)修正換流站功率參考值和下垂系數(shù)。最后,對(duì)不同運(yùn)行方式下含五端柔性直流電網(wǎng)的修正IEEE 39和IEEE 118節(jié)點(diǎn)交直流混聯(lián)系統(tǒng)進(jìn)行計(jì)算分析,其結(jié)果驗(yàn)證了所述方法的有效性。
[Abstract]:In the AC / DC hybrid system with flexible DC network, the power reference value and sag coefficient of converter station determine the power distribution of converter station and the slope control relationship between DC voltage and DC power, respectively. Thus, the power flow distribution of the AC / DC hybrid system is determined, so the selection of power reference value and sag coefficient is very important. Therefore, an optimal power flow control strategy for AC / DC hybrid system with flexible DC network is proposed. The power reference value and sag coefficient are optimized to achieve the goal of minimum network loss and DC voltage deviation rate. First of all, the converter station model, AC system model and DC network model are established for the AC / DC hybrid system with flexible DC network, and the unified expression of the control equation of DC network under master-slave operation mode or droop operation mode is established. Then, based on the optimal power flow of AC / DC hybrid system with flexible DC network, the power reference value and sag coefficient of converter station are adaptively corrected online. Finally, the modified IEEE 39 and IEEE 118 bus AC / DC hybrid systems with five terminals flexible DC network under different operation modes are calculated and analyzed. The results show that the proposed method is effective.
【作者單位】： 四川大學(xué)電氣信息學(xué)院;
【基金】：國(guó)家電網(wǎng)公司科技項(xiàng)目(SGRIZLKJ[2015]457)~~
【分類號(hào)】：TM721.3

【相似文獻(xiàn)】

相關(guān)期刊論文 前1條

1 毛志強(qiáng);;基于VSC技術(shù)的交直流混聯(lián)系統(tǒng)靜態(tài)電壓穩(wěn)定分析[J];山東電力技術(shù);2014年03期

相關(guān)碩士學(xué)位論文 前3條

1 武驍;交直流混聯(lián)系統(tǒng)輸電線路繼電保護(hù)關(guān)鍵問題研究[D];西南交通大學(xué);2015年

2 徐鳴;發(fā)電廠高壓側(cè)電壓控制對(duì)交直流混聯(lián)系統(tǒng)穩(wěn)定性影響的研究[D];華南理工大學(xué);2012年

3 陸明;特高壓交直流混聯(lián)系統(tǒng)諧波特性研究[D];華北電力大學(xué);2014年

，

本文編號(hào)：2408936