计及电动汽车充电站的微电网综合控制研究

发布时间：2018-03-24 19:33

本文选题：电动汽车充电站　切入点：PWM变流器　出处：《西安理工大学》2017年硕士论文

【摘要】：随着环境问题的日益加剧,煤炭石油等传统行业造成的环境问题显著威胁着人类的正常生活。雾霾常年笼罩城市,成为了隐形的杀手。为此,国家大力倡导清洁能源的发展,因此对环境友好的电动汽车应运而生。随着政策的大力扶持,电动汽车数量急剧增加,随之而来的建设电动汽车充电站以及充电站如何与大电网进行有效的沟通和交互成为了人们研究的焦点问题。本文研究了一种可以实现电网侧单位功率因数运行和能量双向流动的电动汽车充电站,并将充电站应用于交直流混合微电网中,研究其并网与孤岛模式下的运行状态和控制策略。为未来大批量的充电站和大电网之间的沟通与交互提供了一种新的思路和手段。本文首先论述了电动汽车充电站的研究背景、意义及目的,介绍了交直流混合微电网的国内外研究现状、发展趋势及现存问题。其次,针对传统电动汽车充电站对电网侧谐波含量高,功率因数较低且只能功率单相传输等问题,提出了基于全控器件的PWM变流器,仿真结果表明了该方法可以实现电网侧单位功率因数和能量的双向流动,为充电站与微电网和大电网的交互奠定了基础。再次,讨论了交直流混合微电网及其典型的关键设备如风力发电系统,光伏发电系统,储能系统以及交直流负载等,并实现了风电和光伏系统的最大功率跟踪控制(MPPT)算法和恒压算法,为后期研究充电站的应用环境提出了条件。最后,本文研究了混合微电网的系统级控制策略,并采用主从控制算法,将电动汽车充电站应用于交直流混合微电网之中,使用仿真软件Matlab/Simulink对混合微电网的并网模式和孤岛模型下的各种运行状态及其切换方式进行了仿真分析,仿真结果表明,所提出的充电站控制方法和使用的混合微电网的控制策略可以实现分布式能源的有效利用,实现微电网的可靠、稳定运行。
[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.
【学位授予单位】：西安理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM727

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