本文選題：虛擬電廠　切入點：優(yōu)化調(diào)度　出處：《東南大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：虛擬電廠是多個分布式電源、負(fù)荷及儲能裝置的集合,能有效管理大量地域分散、所屬權(quán)各異的分布式電源,也可集成多個不同區(qū)域的微電網(wǎng),利用自身通信技術(shù)對微電網(wǎng)進(jìn)行管理控制,將其統(tǒng)一呈現(xiàn)給電網(wǎng),減輕電網(wǎng)管理負(fù)擔(dān)。虛擬電廠的核心是能量管理系統(tǒng),它可協(xié)調(diào)發(fā)電單元、負(fù)荷及儲能單元間的能量分配。虛擬電廠的能量管理和優(yōu)化運行因其內(nèi)部分布式電源類型與控制方式的多樣性與特殊性而呈現(xiàn)較高的復(fù)雜性。對含多個微電網(wǎng)的虛擬電廠進(jìn)行優(yōu)化調(diào)度時既應(yīng)考慮多個微電網(wǎng)間的協(xié)調(diào)運行,又應(yīng)實現(xiàn)各微電網(wǎng)自身的最優(yōu)調(diào)度。本文對含微電網(wǎng)的虛擬電廠提出了一種分層隨機優(yōu)化調(diào)度方法。(1)介紹了虛擬電廠內(nèi)分布式電源的類型及相應(yīng)機組特性,給出了其在虛擬電廠優(yōu)化調(diào)度中的數(shù)學(xué)模型。闡述了Copula理論及其在間歇性分布式電源發(fā)電相關(guān)性中的運用,并重點分析了風(fēng)力、光伏發(fā)電的隨機性與相關(guān)性。基于Copula理論構(gòu)建了多個間歇性分布式電源輸出功率的聯(lián)合概率分布模型。(2)依據(jù)分層優(yōu)化與機會約束隨機優(yōu)化理論,建立了虛擬電廠分層隨機優(yōu)化調(diào)度模型。上層虛擬電廠層以虛擬電廠整體利潤最大為目標(biāo),以發(fā)電計劃約束等為約束條件;下層各微電網(wǎng)層以綜合成本最小為目標(biāo),以微電網(wǎng)電能平衡約束、分布式電源發(fā)電約束等為約束條件。下層各微電網(wǎng)模型充分考慮了風(fēng)力、光伏等間歇性分布式電源發(fā)電隨機性與相關(guān)性,建立的優(yōu)化模型均為機會約束優(yōu)化模型。(3)研究了機會約束優(yōu)化的抽樣平均近似轉(zhuǎn)化方法(SAA)及GAMS優(yōu)化軟件的建模使用。通過算例分析了間歇性分布式電源發(fā)電相關(guān)性、機會約束置信水平以及SAA抽樣次數(shù)對虛擬電廠分層隨機優(yōu)化調(diào)度的影響效果。結(jié)果表明了所提虛擬電廠分層隨機優(yōu)化調(diào)度方法的可行性。
[Abstract]:A virtual power plant is a collection of distributed power sources, loads and energy storage devices, which can effectively manage a large number of distributed power sources with different geographical distribution and ownership rights, and can also integrate multiple microgrids in different regions. The microgrid is managed and controlled by its own communication technology, which is presented to the grid in a unified way to lighten the management burden of the power network. The core of the virtual power plant is the energy management system, which can coordinate the generation units. Load and energy distribution among energy storage units. The energy management and optimal operation of virtual power plants presents high complexity due to the diversity and particularity of their internal distributed generation types and control modes. The coordinated operation of multiple microgrids should be taken into account in the optimal dispatching of virtual power plants. In this paper, a hierarchical stochastic optimal dispatching method for virtual power plants with microgrid is proposed. The types of distributed generation in virtual power plants and the characteristics of corresponding units are introduced in this paper. In this paper, the mathematical model of optimal dispatching of virtual power plant is given. The theory of Copula and its application in the correlation of intermittent distributed power generation are expounded, and the wind power is analyzed emphatically. Based on the Copula theory, a joint probability distribution model of output power of multiple intermittent distributed power sources is constructed, which is based on the theory of stratified optimization and chance constrained stochastic optimization. The hierarchical stochastic optimal dispatching model of virtual power plant is established. The upper layer of virtual power plant takes the maximum profit of the virtual power plant as the goal, and the constraint of the generation plan is taken as the constraint condition, while the lower layer of micro-grid layer takes the minimum comprehensive cost as the goal. The power balance constraints and distributed generation constraints of microgrid are taken as constraints, and the randomness and correlation of intermittent distributed generation such as wind and photovoltaic are fully considered in the lower microgrid models. The established optimization models are all opportunity-constrained optimization models. (3) the sampling average approximate transformation method of opportunity-constrained optimization and the modeling application of GAMS optimization software are studied. The correlation of intermittent distributed power generation is analyzed through an example. The effect of chance constraint confidence level and SAA sampling number on hierarchical stochastic optimal dispatching of virtual power plant is studied. The results show the feasibility of the proposed hierarchical stochastic optimal dispatching method for virtual power plant.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TM73

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