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面向实验室建设的微电网运行控制系统设计

时间:2019-01-19 20:20来源:毕业论文
搭建15kW光伏发电系统,并完成运行控制系统的仿真运行和实验调试。本文分析了光伏电池的工作原理和等效电路,建立其仿真模型,在此基础上完成了最大功率跟踪点控制的调试,光伏

摘要21世纪以来,全球能源需求量急剧增大,环境污染和能源危机问题日益突出,开发清洁绿色的可再生能源刻不容缓,并已成为人类当前的首要任务。为高效利用这些可再生能源,人们提出了小型模块化、分散的、布置在用户附近的发电单元即分布式发电,而基于分布式发电的微电网则迎来了新的发展机遇。32964
本文主要研究目的是结合我校实验室建设的要求,搭建15kW光伏发电系统,并完成运行控制系统的仿真运行和实验调试。本文分析了光伏电池的工作原理和等效电路,建立其仿真模型,在此基础上完成了最大功率跟踪点控制的调试,光伏电池能够灵敏地工作在效率最高的状态。然后对并网逆变器的闭环控制策略做了研究,采用瞬时值反馈的单极性SPWM控制方式完成了逆变部分的设计,并做了仿真运行调试,逆变输出电流满足并网要求。仿真与实验结果证明本文设计的单相光伏并网发电系统能够很好地满足实验室建设的要求,并且经济、清洁、安全,发电效率较高。
关键词   分布式发电   微电网    光伏电池    并网逆变器
毕业论文设计说明书外文摘要
Title Design of micro grid operation control system for laboratory project
Abstract
Since twenty-first century, global energy demand is increasing rapidly, Energy crisis and environmental pollution problems have become increasingly prominent, so the development of clean green renewable energy crunch time and has become the primary task for human being. For the efficient use of these renewable energy, people put forward the small modular, scattered layout, power generation units in the user in the vicinity of the distributed power generation. SO the micro grid based on distributed generation will usher in a new development opportunity. 源`自*六)维[论*文'网www.lwfree.cn
The purpose of this paper is to build 15kW photovoltaic power generation system and finish the simulation and experiment of the control system, combining requirements of our school laboratory project. In this paper, the working principle and equivalent circuit of photovoltaic cells are analyzed, its simulation model is also built. The debugging of maximum power point tracking control is completed based on the analysis. It shows that photovoltaic cells can work sensitively in the highest efficiency state. Then the closed-loop control strategy of grid connected inverter is studied. I complete the design of inverter circuit with the unipolar SPWM control based on instantaneous value feedback, also some    simulation .The result shows that inverter output current meets grid requirements. The simulation and experimental results prove that the unidirectional photovoltaic power generation system designed in this paper can well meet the requirements of the laboratory project, with the advantages of economical, clean, safe and high   efficiency.
Keywords    DG    Micro-grid    Photovoltaic cell    Grid connected inverter
 目    次
1  引言    1
1.1  课题背景及意义    1
1.2  光伏发电发展状况    2
1.3  光伏电池简介    3
1.4  并网光伏逆变器简介    3
1.5  本文主要研究内容    4
2  光伏发电系统总体方案    5
2.1 实验室微电网建设需求分析    5
2.2  光伏并网系统拓扑结构    5
2.3  光伏并网发电系统模型    7
2.4 本章小结    7
3  光伏电池最大功率跟踪控制    8
3.1  光伏电池工作原理    8 源`自*六)维[论*文'网www.lwfree.cn
3.2  光伏电池板等效电路及其仿真模型    8 面向实验室建设的微电网运行控制系统设计:http://www.lwfree.cn/zidonghua/20190119/29781.html
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