本文選題：新能源聯(lián)合供電　切入點：多輸入直流變換器　出處：《電子科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：為了緩解能源危機和環(huán)境問題,新能源的開發(fā)利用越來越受到人們的重視。但一些新能源受到自身的和環(huán)境的各種因素制約,具有供電不連續(xù)、不穩(wěn)定等缺點�？梢岳眯履茉锤髯跃哂械奶匦院透鞣N新能源之間的聯(lián)系,將多種新能源發(fā)電形式組合起來構(gòu)成新能源聯(lián)合供電系統(tǒng),并對這些能源形式進行合理的能量分配,便可使系統(tǒng)更加穩(wěn)定和連續(xù),還可實現(xiàn)能源的優(yōu)化利用。在新能源聯(lián)合供電系統(tǒng)中,使用單個多輸入直流變換器(Multiple-Input Converter,MIC),而不是以往的多個單輸入直流變換器,如此可以簡化系統(tǒng)結(jié)構(gòu)和降低系統(tǒng)成本。太陽能作為一種具有無限免費資源的可再生清潔能源,現(xiàn)已受到世界各國學(xué)者的廣泛研究。在易于獲得的地區(qū),市電作為一種穩(wěn)定的能源,非常適合作為太陽能的補充能源來彌補太陽能受外界環(huán)境限制大的缺點。本文由聯(lián)合供電系統(tǒng)的概念引入到多輸入直流變換器,首先介紹了多輸入直流變換器的基本結(jié)構(gòu)和組成單元,然后由這些組成單元按照一些級聯(lián)規(guī)則得到了各種類型的MIC電路。然后本文以雙輸入Buck變換器作為例子,分析了此類MIC的基本原理和電路特性,并給出了基于光伏與市電聯(lián)合供電系統(tǒng)的能量管理策略。該變換器具有電路簡單、控制靈活、兩路輸入源可以同時給負載供電的優(yōu)點。為了實現(xiàn)太陽能電池和市電之間的能量合理分配,就需要弄清楚二者的工作特性。本文介紹了太陽能電池的工作原理和工作特性,對太陽能電池進行了數(shù)學(xué)建模,并在Matlab/Simulink中搭建了仿真模型,并結(jié)合市電搭建了基于雙輸入Buck變換器的光伏與市電聯(lián)合供電系統(tǒng)的仿真模型。為了實現(xiàn)太陽能電池的優(yōu)先利用,能量管理在新能源聯(lián)合供電系統(tǒng)中是必不可少的。能量管理的核心思想為使系統(tǒng)工作在三種工作模式下,使負載盡可能多地使用太陽能電池所提供的能量,剩余能量由市電補充。本文結(jié)合雙輸入Buck變換器,采用兩個調(diào)節(jié)器,一個調(diào)節(jié)太陽能電池的功率使其以最大功率輸出,另外一個調(diào)節(jié)輸出電壓使其穩(wěn)定在額定電壓。本文最后搭建了一臺200W的基于雙輸入Buck變換器的光伏與市電聯(lián)合供電系統(tǒng)進行了實驗驗證,實驗結(jié)果驗證了系統(tǒng)的工作原理是正確的,所采用的能量管理策略也是合理的。
[Abstract]:In order to alleviate the energy crisis and environmental problems, people pay more and more attention to the development and utilization of new energy. Instability and other shortcomings. It is possible to combine various forms of new energy generation to form a new energy joint power supply system using the characteristics of each new energy source and the linkages between various new sources of energy, and to allocate these forms of energy reasonably. It can make the system more stable and continuous, and realize the optimal utilization of energy. In a new energy supply system, a single multi-input DC / DC converter, Multiple-Input converter, is used instead of the previous single-input DC / DC converter. Solar energy, as a renewable and clean energy source with unlimited free resources, has been extensively studied by scholars all over the world. As a kind of stable energy, municipal power is very suitable as a supplementary energy of solar energy to compensate for the limitation of solar energy by external environment. In this paper, the concept of joint power supply system is introduced into multi-input DC / DC converters. This paper first introduces the basic structure and components of multi-input DC / DC converters, and then obtains various types of MIC circuits according to some cascade rules by these components. Then, this paper takes double input Buck converters as an example. The basic principle and circuit characteristics of this kind of MIC are analyzed, and the energy management strategy based on photovoltaic and municipal power supply system is given. The converter has the advantages of simple circuit and flexible control. In order to realize the reasonable distribution of energy between solar cells and municipal electricity, we need to find out their working characteristics. The working principle and characteristics of solar cells are introduced in this paper. The mathematical model of solar cell is established, and the simulation model is built in Matlab/Simulink, and the simulation model of photovoltaic and municipal power supply system based on dual-input Buck converter is built. In order to realize the preferential utilization of solar cell, the simulation model of photovoltaic and municipal power supply system based on dual-input Buck converter is built. Energy management is essential in a new energy supply system. The core idea of energy management is to make the system work in three modes, so that the load uses as much energy as possible from solar cells. The residual energy is replenished by municipal power. In this paper, two regulators are used in combination with dual input Buck converter, one adjusts the power of the solar cell to make it output with maximum power. The other one adjusts the output voltage to make it stable at rated voltage. Finally, a 200W photovoltaic and electric power supply system based on dual-input Buck converter is built. The experimental results show that the principle of the system is correct and the energy management strategy is reasonable.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM46;TM72

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相關(guān)碩士學(xué)位論文 前1條

1 田勤曼;光伏發(fā)電系統(tǒng)中最大功率跟蹤控制方法的研究[D];天津大學(xué);2008年

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本文編號：1612809