【摘要】：現(xiàn)有智能配電網(wǎng)孤島劃分研究主要從功率平衡的角度出發(fā),對(duì)電網(wǎng)安全約束考慮不充分,未考慮電能質(zhì)量的影響,難以保證孤島安全可靠運(yùn)行。提出一種計(jì)及電能質(zhì)量影響的智能配電網(wǎng)孤島劃分策略。故障后,首先計(jì)及聯(lián)絡(luò)開(kāi)關(guān)進(jìn)行網(wǎng)絡(luò)連通性分析,進(jìn)行初始孤島劃分。然后,對(duì)每個(gè)初始孤島,建立切負(fù)荷-網(wǎng)絡(luò)重構(gòu)雙層優(yōu)化模型,并采用微分進(jìn)化算法和混合粒子群算法求解,以降低搜索空間維數(shù)。具體地,在切負(fù)荷優(yōu)化模型中,在允許頻偏范圍內(nèi)充分發(fā)揮DG的調(diào)頻特性,以減少負(fù)荷切除量;在網(wǎng)絡(luò)重構(gòu)優(yōu)化模型中,建立包含頻率約束、負(fù)序及諧波不確定性約束的電能質(zhì)量綜合約束集。提出基于序列二次規(guī)劃法的配電網(wǎng)柔性潮流算法計(jì)算頻率偏移條件下的孤島潮流,引入點(diǎn)估計(jì)法進(jìn)行負(fù)序、諧波不確定性分析,以改善孤島的電能質(zhì)量,提高其運(yùn)行可靠性。最后,基于實(shí)際復(fù)雜配電網(wǎng)算例,驗(yàn)證了該策略的有效性和優(yōu)越性。
[Abstract]:The existing research on islanding of smart distribution network is mainly from the point of view of power balance. It is difficult to ensure the safe and reliable operation of the island because of the insufficient consideration of security constraints and the influence of power quality. An islanding strategy for intelligent distribution network is proposed, which takes into account the influence of power quality. After the fault, the network connectivity is analyzed with the contact switch, and the initial island partition is carried out. Then, for each initial isolated island, a double layer optimization model of shedding load network reconstruction is established and solved by using differential evolution algorithm and hybrid particle swarm optimization algorithm to reduce the dimension of search space. Specifically, in the load shedding optimization model, the frequency modulation characteristic of DG is brought into full play in the range of allowable frequency offset to reduce the load removal. In the optimization model of network reconfiguration, a comprehensive constraint set of power quality including frequency constraint, negative sequence constraint and harmonic uncertainty constraint is established. A flexible power flow algorithm based on sequential quadratic programming is proposed to calculate the islanding power flow under frequency offset condition. The point estimation method is introduced to analyze the negative sequence and harmonic uncertainty in order to improve the power quality of the isolated island and improve its operational reliability. Finally, the effectiveness and superiority of the strategy are verified based on a practical example of complex distribution network.
【作者單位】： 武漢大學(xué)電氣工程學(xué)院;太陽(yáng)能高效利用湖北省協(xié)同創(chuàng)新中心;華中電力調(diào)控分中心;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51177111) 太陽(yáng)能高效利用湖北省協(xié)同創(chuàng)新中心重大專項(xiàng)(HBSZD2014003)資助
【分類號(hào)】：TM732

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 ;智能配電管理中心[J];企業(yè)科技與發(fā)展;2010年03期

2 劉東;;智能配電網(wǎng)的特征及實(shí)施基礎(chǔ)分析[J];電力科學(xué)與技術(shù)學(xué)報(bào);2011年01期

3 鄭旭濤;;福州智能配電網(wǎng)發(fā)展模式初探[J];科技傳播;2011年12期

4 張振環(huán);許曉輝;龍斌;;工礦企業(yè)智能配電系統(tǒng)的應(yīng)用[J];科技信息;2011年29期

5 顧瑞婷;陳虹;朱菲菲;朱健;;智能配電網(wǎng)通信技術(shù)幾個(gè)問(wèn)題的探討[J];電力系統(tǒng)通信;2011年11期

6 亓富軍;魏飛;馮德品;;智能配電網(wǎng)建設(shè)與發(fā)展淺析[J];機(jī)電信息;2012年12期

7 趙t，

本文編號(hào)：2424008