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电动汽车接入微网优化调度模型建立及其算例
2021年电子技术应用第1期
金商鹤1,张 宇1,2,王育飞1,时珊珊2,王皓靖2
1.上海电力大学 电气工程学院,上海200090;2.国网上海市电力公司电力科学研究院,上海200437
摘要: 为了解决风、光出力波动性和电动汽车接入电网无序充电问题,根据电动汽车用户对激励因素的敏感程度不同,建立电动汽车分类接入微网两阶段优化调度模型,并开展算例分析。研究结果表明,与无序充电相比,电动汽车两阶段调度微网在负荷峰、谷时段的?琢值都明显减小,储能单元基本能满足微网运行需求,风光利用率高达95.43%,联络线交换功率仅为24.2 kW,显著减小微网风光出力波动对大电网的影响。随着III类电动汽车占比逐渐增加,风光利用率明显上升。算例分析证明所提出的两阶段优化调度模型能有效降低微网外购电量,提高风光利用率,改善微网功率波动对大电网的影响。
中圖分類號: TP33
文獻標(biāo)識碼: A
DOI:10.16157/j.issn.0258-7998.200179
中文引用格式: 金商鶴,張宇,王育飛,等. 電動汽車接入微網(wǎng)優(yōu)化調(diào)度模型建立及其算例[J].電子技術(shù)應(yīng)用,2021,47(1):82-85,107.
英文引用格式: Jin Shanghe,Zhang Yu,Wang Yufei,et al. Establishment of optimal scheduling model for electric vehicles connected to microgrid and calculation examples[J]. Application of Electronic Technique,2021,47(1):82-85,107.
Establishment of optimal scheduling model for electric vehicles connected to microgrid and calculation examples
Jin Shanghe1,Zhang Yu1,2,Wang Yufei1,Shi Shanshan2,Wang Haojing2
1.Shanghai University of Electric Power,Shanghai 200090,China; 2.State Grid Shanghai Electric Power Research Institute,Shanghai 200437,China
Abstract: In order to solve the problem of fluctuation of wind-power output and disordered charging of electric vehicles connected to the power grid, a two-stage optimal dispatching model of electric vehicles connected to the micro grid by classification was established according to the sensitivity of electric vehicle users to the incentive factors, and a case study was carried out. The research results show that compared with disordered charging, the two-stage dispatching micro grid of electric vehicles significantly reduces the value in load peak and valley periods, the energy storage unit can basically meet the operation demand of the micro grid, the wind-energy utilization rate is up to 95.43%, and the connection line exchange power is only 24.2 kW, which significantly reduces the impact of wind-energy fluctuations of the micro grid on the large power grid. With the increase of the proportion of class III electric vehicles, the utilization rate of wind-power increased obviously. An example shows that the proposed two-stage optimal dispatching model can effectively reduce the power purchased from the micro grid, which improves the utilization rate of wind and wind, and improves the influence of micro grid power fluctuations on the large power grid.
Key words : access micro network;electric cars;scheduling model;wind utilization rate;the example analysis

0 引言

    近年來微網(wǎng)和電動汽車發(fā)展突飛猛進,風(fēng)、光出力波動性和電動汽車接入電網(wǎng)無序充電問題亟待解決[1]。為此國內(nèi)外學(xué)者構(gòu)想將電動汽車與微網(wǎng)協(xié)調(diào)運行,以緩解兩者單獨接入電網(wǎng)的不利影響,促進兩者的應(yīng)用和發(fā)展[2-5]。在微電網(wǎng)中連接電動汽車進行儲能時,可以有效避免發(fā)生間歇性新能源出力的情況,現(xiàn)階段已有許多學(xué)者研究了將電動汽車與微網(wǎng)進行連接時的優(yōu)化調(diào)度技術(shù)。例如,文獻[6]-[8]設(shè)計了一種對含有電動汽車的微網(wǎng)系統(tǒng)進行多目標(biāo)調(diào)度的分析模型,結(jié)果發(fā)現(xiàn)采取有序充放電的方式可以獲得比無序充電入網(wǎng)方式更高的經(jīng)濟性;文獻[8]報道了由電動汽車構(gòu)成的光、風(fēng)、儲能微電網(wǎng)調(diào)度模型,通過引入更加協(xié)調(diào)的運行模式能夠有效減小系統(tǒng)的運行成本并降低電動汽車運行費用;文獻[9]同時分析了微網(wǎng)發(fā)電成本及其對環(huán)境造成的影響,對分布式電源的出力狀況進行了動態(tài)分析,因此能夠?qū)崿F(xiàn)在低發(fā)電成本的條件下獲得更優(yōu)的環(huán)境效益;文獻[10]根據(jù)微網(wǎng)內(nèi)存在的不確定因素設(shè)計得到了具有良好魯棒性的經(jīng)濟調(diào)度模型,并達到了較低的電動車損耗,同時滿足魯棒性與經(jīng)濟性要求?,F(xiàn)有文獻多通過直接負荷控制的方式滿足實施方需求,其對電動汽車特殊性的考慮不夠充分,較少關(guān)注單輛電動汽車參與激勵型需求響應(yīng)項目后的實際響應(yīng)效果[11-14]。文獻[15]-[16]以負荷峰值削減為目標(biāo),制定有序的電動汽車充電策略,該類方法通常缺少對電動汽車參與響應(yīng)的效果評估,忽略用戶側(cè)需求[17]。上述文獻較少考慮電動汽車車主響應(yīng)意愿,單方面認為入網(wǎng)的電動汽車皆可參與充放電調(diào)度;其次,優(yōu)化調(diào)度通常直接針對單輛電動汽車,電動汽車數(shù)量較多時容易引發(fā)“維數(shù)災(zāi)”問題。

    本文從電動汽車用戶響應(yīng)意愿角度出發(fā),建立兩階段優(yōu)化調(diào)度模型,兩階段優(yōu)化方法的決策變量數(shù)顯著減少,有利于大量電動汽車充放電優(yōu)化問題的快速求解。




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作者信息:

金商鶴1,張  宇1,2,王育飛1,時珊珊2,王皓靖2

(1.上海電力大學(xué) 電氣工程學(xué)院,上海200090;2.國網(wǎng)上海市電力公司電力科學(xué)研究院,上海200437)

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