發(fā)布時(shí)間：2019-03-08 20:16

【摘要】：隨著我國(guó)經(jīng)濟(jì)建設(shè)的持續(xù)發(fā)展,電力行業(yè)的壟斷式經(jīng)營(yíng)方式不能適應(yīng)電力工業(yè)的發(fā)展要求,為此,世界各國(guó)都在大力推進(jìn)電力市場(chǎng)改革,引入競(jìng)爭(zhēng)機(jī)制。與此同時(shí),傳統(tǒng)的集中供電方式不能夠滿足國(guó)民生產(chǎn)生活的用電需求,加上全球能源問(wèn)題與環(huán)境壓力的不斷增大,利用可再生能源發(fā)電、有效提高能源利用效率的分布式發(fā)電技術(shù)應(yīng)運(yùn)而生,而單一的分布式電源并網(wǎng)運(yùn)行會(huì)對(duì)大電網(wǎng)的穩(wěn)定性產(chǎn)生不利影響。為解決這一矛盾,國(guó)內(nèi)外專(zhuān)家們提出了微網(wǎng),通過(guò)微網(wǎng)的能量管理,以協(xié)調(diào)分布式電源與配電網(wǎng)的運(yùn)行方式。對(duì)構(gòu)成微網(wǎng)的不同分布式電源進(jìn)行了研究,分析了分布式電源發(fā)電的技術(shù)特點(diǎn),并建立其功率特性的數(shù)學(xué)模型。結(jié)合風(fēng)、光等自然因素的統(tǒng)計(jì)模型,建立了風(fēng)力發(fā)電、光伏發(fā)電出力模型;通過(guò)對(duì)熱電聯(lián)供系統(tǒng)的分析,根據(jù)以熱定電的原則,確定微型燃?xì)廨啓C(jī)的出力下限;考慮蓄電池的使用壽命,提出蓄電池充放電過(guò)程中的條件約束。在深入研究電力市場(chǎng)的基礎(chǔ)上,分析了電力市場(chǎng)與微網(wǎng)在電力工業(yè)發(fā)展進(jìn)程中的相互影響。配電公司通過(guò)調(diào)整交易電價(jià)進(jìn)行需求側(cè)管理,刺激和鼓勵(lì)用戶改變消費(fèi)行為和用電方式,減少電量消耗和電力需求;作為電力價(jià)格的需求側(cè)響應(yīng),微網(wǎng)通過(guò)對(duì)分布式電源與儲(chǔ)能裝置的有效控制,調(diào)整峰谷時(shí)段的交易電量,在實(shí)現(xiàn)自身經(jīng)濟(jì)利益的同時(shí),改善配電網(wǎng)的功率波動(dòng)。通過(guò)分析電力市場(chǎng)環(huán)境中的微網(wǎng)運(yùn)行成本,建立考慮合約期經(jīng)濟(jì)利益的微網(wǎng)能量管理數(shù)學(xué)模型,在目標(biāo)函數(shù)中引入隨機(jī)變量。根據(jù)置信區(qū)間的概念,建立基于置信區(qū)間的優(yōu)化模型,說(shuō)明了不同隨機(jī)變量的處理方法,并提出變置信區(qū)間的優(yōu)化思想。最后通過(guò)仿真算例進(jìn)行驗(yàn)證,證明優(yōu)化方法的有效性,能夠解決電力市場(chǎng)環(huán)境下的微網(wǎng)能量管理問(wèn)題。
[Abstract]:With the sustainable development of China's economic construction, the monopoly management mode of electric power industry can not meet the requirements of the development of electric power industry. Therefore, all the countries in the world are pushing forward the reform of electric power market and introducing the competition mechanism. At the same time, the traditional centralized mode of power supply cannot meet the needs of national production and life, coupled with the increasing global energy problems and environmental pressures, and the use of renewable energy to generate electricity, Distributed power generation technology, which can effectively improve energy utilization efficiency, emerges as the times require, and single distributed power supply connected to the grid will have an adverse impact on the stability of the large power grid. In order to solve this contradiction, experts at home and abroad put forward micro-grid, through the energy management of micro-grid, to coordinate the operation mode of distributed power supply and distribution network. This paper studies the different distributed power sources which constitute the micro-grid, analyzes the technical characteristics of the distributed power generation, and establishes the mathematical model of its power characteristics. Combined with the statistical model of natural factors such as wind and light, the output model of wind power generation and photovoltaic power generation is established, and the lower limit of output of micro gas turbine is determined according to the principle of heat and electricity determination through the analysis of the co-generation system of heat and power. Considering the service life of battery, the condition constraint in the process of battery charging and discharging is put forward. Based on the in-depth study of the power market, the interaction between the power market and the micro-grid in the development of the electric power industry is analyzed. The power distribution company carries on the demand side management through the adjustment transaction price, stimulates and encourages the user to change the consumption behavior and the power consumption way, reduces the electricity consumption and the electricity demand; As the demand-side response of electricity price, micro-grid can adjust the trading quantity during peak-valley period by controlling the distributed power supply and energy storage device effectively, so as to realize its own economic benefit and improve the power fluctuation of distribution network at the same time. By analyzing the operating cost of micro-grid in power market environment, a mathematical model of micro-grid energy management considering the economic benefits of contract period is established, and random variables are introduced into the objective function. According to the concept of confidence interval, the optimization model based on confidence interval is established. The processing methods of different random variables are explained, and the optimization idea of variable confidence interval is put forward. Finally, a simulation example is given to verify the effectiveness of the optimization method, which can solve the energy management problem of micro-grid in the environment of power market.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TM732

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