本文選題：分布式發(fā)電 + 微網(wǎng)��； 參考：《天津大學(xué)》2014年博士論文

【摘要】：為了提高配電系統(tǒng)供電可靠性和促進(jìn)可再生能源高效利用，分布式發(fā)電微網(wǎng)技術(shù)受到越來越多的重視。微網(wǎng)在配電系統(tǒng)中的應(yīng)用日益廣泛，但相應(yīng)的可靠性分析方法尚不完善。論文針對(duì)微網(wǎng)可靠性分析指標(biāo)與方法、含高密度分布式電源的配電系統(tǒng)可靠性評(píng)估、以及含微網(wǎng)的配電系統(tǒng)可靠性規(guī)劃開展了研究。主要工作如下： 結(jié)合微網(wǎng)結(jié)構(gòu)與運(yùn)行的特點(diǎn)，定義了一系列用于評(píng)價(jià)微網(wǎng)可靠性與經(jīng)濟(jì)性的新指標(biāo)。這些指標(biāo)從微網(wǎng)孤島運(yùn)行充裕度、微網(wǎng)內(nèi)分布式電源特征、微網(wǎng)與配電系統(tǒng)的關(guān)系等幾方面反映微網(wǎng)的可靠性；從微網(wǎng)發(fā)電成本、微網(wǎng)同配電系統(tǒng)能量交換狀況、微網(wǎng)整體收益狀況等幾方面衡量微網(wǎng)的經(jīng)濟(jì)性。所提指標(biāo)可為微網(wǎng)的性能評(píng)價(jià)與規(guī)劃決策提供科學(xué)依據(jù)。 建立了微網(wǎng)公共耦合點(diǎn)（PCC）的等效發(fā)電機(jī)模型，并基于該模型提出了微網(wǎng)可靠性評(píng)估的兩階段序貫蒙特卡羅模擬法。該方法利用PCC等效發(fā)電機(jī)模型將配電系統(tǒng)與微網(wǎng)的可靠性分析過程在微網(wǎng)PCC處解耦，既能反映配電系統(tǒng)中的隨機(jī)故障和孤島轉(zhuǎn)換過程對(duì)微網(wǎng)可靠性的影響，又能通過小步長的仿真給出微網(wǎng)運(yùn)行的更為詳細(xì)的信息。 提出了光伏接入可靠性的概念及相應(yīng)的指標(biāo)，可以定量分析配電系統(tǒng)保證光伏可靠接入并使其發(fā)電得到充分利用的能力�；跉v史數(shù)據(jù)，利用統(tǒng)計(jì)方法建立了能夠反映光伏出力與負(fù)荷水平在時(shí)間上對(duì)應(yīng)關(guān)系的概率解析模型，并結(jié)合該模型分別分析了光伏高密度接入時(shí)電壓約束與系統(tǒng)故障對(duì)用戶負(fù)荷與光伏接入可靠性的影響。建立了系統(tǒng)電壓越限時(shí)的切光伏優(yōu)化模型，可以在最大程度保證光伏發(fā)電就地消納的基礎(chǔ)上實(shí)現(xiàn)系統(tǒng)切光伏總量最小。 提出了含多微網(wǎng)配電系統(tǒng)的可靠性分析方法，該方法基于分塊最小割集算法，可以有效處理微網(wǎng)多層解列運(yùn)行結(jié)構(gòu)對(duì)系統(tǒng)可靠性評(píng)估過程的影響。提出了反映配電系統(tǒng)的供電能力與負(fù)荷多樣化可靠性需求契合程度的可靠性偏移度指標(biāo)，，并以該指標(biāo)最優(yōu)為目標(biāo)建立了配電系統(tǒng)中靜態(tài)開關(guān)與微型燃?xì)廨啓C(jī)的優(yōu)化配置模型，實(shí)現(xiàn)在有限的投入下，通過形成合理的微網(wǎng)來最大程度滿足各類負(fù)荷對(duì)可靠性的不同需求。提出了基于疫苗庫進(jìn)化的改進(jìn)免疫遺傳算法對(duì)上述組合優(yōu)化問題進(jìn)行求解，該算法通過種群與疫苗庫的雙重進(jìn)化機(jī)制有效保證了算法的全局搜索能力與局部開發(fā)能力。
[Abstract]:In order to improve the reliability of power distribution system and promote the efficient utilization of renewable energy, the distributed generation micronetwork technology has been paid more and more attention. The application of micro network in the distribution system is becoming more and more extensive, but the corresponding reliability analysis method is not perfect. The reliability evaluation of distribution system and the reliability planning of distribution system with microgrid are studied. The main work is as follows:
A series of new indexes to evaluate the reliability and economy of micronetworks are defined in the light of the characteristics of micronet structure and operation. These indexes reflect the reliability of micronetworks in several aspects, such as the margin margin of the micronetwork isolated island operation, the characteristics of the distributed power in the micronet and the relationship between the micro network and the distribution system, and the energy of the microgrid and the power of the distribution system from the micro network. The exchange status, the overall revenue status of microgrid and other aspects measure the economics of microgrid. The index can provide a scientific basis for performance evaluation and planning decision of microgrid.
The equivalent generator model of micronetwork common coupling point (PCC) is established. Based on this model, a two stage sequential Monte Carlo simulation method for the reliability evaluation of micronet is proposed. This method uses the PCC equivalent generator model to decouple the reliability analysis process of the distribution system and the micronet at the micronetwork PCC, which can not only reflect the random faults in the distribution system. And the effect of island transformation on the reliability of microgrid, and the more detailed information of microgrid operation can be given through the simulation of small step length.
The concept of photovoltaic access reliability and the corresponding indexes are proposed, which can be used to quantitatively analyze the ability of the power distribution system to ensure the reliable access of the photovoltaic system and make the power generation fully utilized. Based on the historical data, a probabilistic analytical model which can reflect the time corresponding relationship between the photovoltaic power and the load level is established by using the statistical method, and is combined with this model. The effects of voltage constraints and system failures on the user load and the reliability of photovoltaic access are analyzed respectively, and a photovoltaic optimization model is established when the system voltage is limited, which can minimize the total photovoltaic volume on the basis of the maximum guaranteed cost of photovoltaic generation in situ.
The reliability analysis method of a multi microgrid distribution system is proposed. Based on the block minimum cut set algorithm, this method can effectively deal with the influence of the operation structure of the microgrid multilayer disassembly on the system reliability evaluation process. The optimal configuration model of the static switch and micro gas turbine in the distribution system is set up with the target optimal. Under the limited input, a reasonable micronet is formed to meet the different requirements of the reliability of all kinds of loads. An improved immune genetic algorithm based on the phylogenetic tree evolution is proposed. Solving the optimization problem, the algorithm can effectively guarantee the global search ability and local development ability of the algorithm through the dual evolution mechanism of population and vaccine library.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM732

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