本文選題：電動汽車充電站　切入點：PWM變流器　出處：《西安理工大學(xué)》2017年碩士論文

【摘要】：隨著環(huán)境問題的日益加劇,煤炭石油等傳統(tǒng)行業(yè)造成的環(huán)境問題顯著威脅著人類的正常生活。霧霾常年籠罩城市,成為了隱形的殺手。為此,國家大力倡導(dǎo)清潔能源的發(fā)展,因此對環(huán)境友好的電動汽車應(yīng)運而生。隨著政策的大力扶持,電動汽車數(shù)量急劇增加,隨之而來的建設(shè)電動汽車充電站以及充電站如何與大電網(wǎng)進(jìn)行有效的溝通和交互成為了人們研究的焦點問題。本文研究了一種可以實現(xiàn)電網(wǎng)側(cè)單位功率因數(shù)運行和能量雙向流動的電動汽車充電站,并將充電站應(yīng)用于交直流混合微電網(wǎng)中,研究其并網(wǎng)與孤島模式下的運行狀態(tài)和控制策略。為未來大批量的充電站和大電網(wǎng)之間的溝通與交互提供了一種新的思路和手段。本文首先論述了電動汽車充電站的研究背景、意義及目的,介紹了交直流混合微電網(wǎng)的國內(nèi)外研究現(xiàn)狀、發(fā)展趨勢及現(xiàn)存問題。其次,針對傳統(tǒng)電動汽車充電站對電網(wǎng)側(cè)諧波含量高,功率因數(shù)較低且只能功率單相傳輸?shù)葐栴},提出了基于全控器件的PWM變流器,仿真結(jié)果表明了該方法可以實現(xiàn)電網(wǎng)側(cè)單位功率因數(shù)和能量的雙向流動,為充電站與微電網(wǎng)和大電網(wǎng)的交互奠定了基礎(chǔ)。再次,討論了交直流混合微電網(wǎng)及其典型的關(guān)鍵設(shè)備如風(fēng)力發(fā)電系統(tǒng),光伏發(fā)電系統(tǒng),儲能系統(tǒng)以及交直流負(fù)載等,并實現(xiàn)了風(fēng)電和光伏系統(tǒng)的最大功率跟蹤控制(MPPT)算法和恒壓算法,為后期研究充電站的應(yīng)用環(huán)境提出了條件。最后,本文研究了混合微電網(wǎng)的系統(tǒng)級控制策略,并采用主從控制算法,將電動汽車充電站應(yīng)用于交直流混合微電網(wǎng)之中,使用仿真軟件Matlab/Simulink對混合微電網(wǎng)的并網(wǎng)模式和孤島模型下的各種運行狀態(tài)及其切換方式進(jìn)行了仿真分析,仿真結(jié)果表明,所提出的充電站控制方法和使用的混合微電網(wǎng)的控制策略可以實現(xiàn)分布式能源的有效利用,實現(xiàn)微電網(wǎng)的可靠、穩(wěn)定運行。
[Abstract]:With the increasing of environmental problems, the environmental problems caused by traditional industries such as coal and oil have significantly threatened the normal life of human beings. Haze has shrouded the city all year round and become an invisible killer. Therefore, the country vigorously advocates the development of clean energy. As a result, environment-friendly electric vehicles came into being. With the strong support of the policy, the number of electric vehicles has increased dramatically. How to communicate and interact effectively with the large power grid has become the focus of research. In this paper, a kind of unit power factor operation on the power grid side can be realized, which is the focus of the research on the construction of electric vehicle charging station and how to effectively communicate and interact with the large power grid. And two-way energy flow in electric vehicle charging stations, The charging station is applied to AC / DC hybrid microgrid. This paper studies the operation state and control strategy in the mode of grid-connected and islanding. It provides a new way of communication and interaction between charging stations and power grids in the future. Firstly, this paper discusses the research background of charging stations for electric vehicles. In this paper, the research status, development trend and existing problems of AC / DC hybrid microgrid at home and abroad are introduced. Secondly, aiming at the high harmonic content of traditional electric vehicle charging station on the grid side, The power factor is low and can only be transmitted by single phase power. The PWM converter based on full control device is proposed. The simulation results show that the method can realize the bidirectional flow of unit power factor and energy on the power grid side. It lays the foundation for the interaction between charging station and microgrid and large grid. Thirdly, the AC / DC hybrid microgrid and its typical key equipments such as wind power system, photovoltaic system, energy storage system and AC / DC load are discussed. The maximum power tracking control algorithm and constant voltage algorithm for wind power and photovoltaic systems are implemented, which provides the conditions for the later research on the application environment of charging stations. Finally, the system level control strategy of hybrid microgrid is studied in this paper. Using master-slave control algorithm, the charging station of electric vehicle is applied to AC / DC hybrid microgrid. The simulation software Matlab/Simulink is used to simulate and analyze the various operation states and switching modes of hybrid microgrid under the grid-connected mode and islanding model. The simulation results show that the proposed charging station control method and the hybrid microgrid control strategy can realize the effective utilization of distributed energy and the reliable and stable operation of the microgrid.
【學(xué)位授予單位】：西安理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM727

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