某海岛智能微网系统设计与实现

发布时间：2018-06-10 01:21

本文选题：海岛微电网 + 直流微电网　；参考：《山东建筑大学》2017年硕士论文

【摘要】：近年来,化石能源危机日益严重,传统火力发电将面临资源枯竭的考验,同时火力发电排放大量二氧化碳,带来了严重的环境问题。同时,大电网在本世纪初发生了几次大规模停电事件,暴漏了大电网运行维护难度大,难以满足用户日益增长的用电质量需求等缺点。大电网在军事上也易成为攻击目标,一旦被攻击,造成电力系统停电,依赖电力的设施将全部瘫痪。微电网的提出为解决这些问题提供了新的思路。微电网整合分布式电源、储能单元,协调控制成为一个自治系统,既可以与大电网进行能量交换,也可以独立运行为系统内负荷提供电能。开展微电网技术方面研究,迫切需要以实际工程为依托。基于此,本课题着手设计一个海岛微电网系统。首先,对海岛微电网进行整体方案设计。介绍了海岛微电网的目前供用电情况,并对供电需求进行了分析,分别比较交流微电网方案与直流微电网方案在项目实施地点的优劣。分析了含混合储能的直流微电网在本项目中的优势,并对海岛微电网内设备进行选型,确定了海岛微电网的整体设计方案。其次,对微电网内变流器的设计。变流器是微电网控制实现的关键设备,本文将课题内五台变流器分为三种类型,分别从拓扑结构设计、内部主要元件选型方面对这三种类型的变流器进行设计,介绍了变流器控制模块的结构,并给出了变流器的控制模块检测与驱动的实现方法。再次,针对海岛微电网内分布式发电单元与混合储能的协调控制问题,提出一种基于直流母线电压分层协调控制策略,分别阐述了运行在这种控制方法下的各变流器控制模式的实现方法。随后,搭建了基于昆仑通态(MCGS)组态软件的海岛微电网监控系统。不仅实现了数据显示、曲线与报表输出、故障记录等功能,还将上述协调控制方法嵌入监控系统中,实现了海岛微电网的智能化无人值守。最后,进行系统实验。分别观测离网模式下系统抗扰动能力、并离网切换时系统输出曲线的波动。实验结果表明,系统能够稳定运行。
[Abstract]:In recent years, the crisis of fossil energy is becoming more and more serious. Traditional thermal power generation will face the test of resource depletion. Meanwhile, thermal power generation emissions a lot of carbon dioxide, which brings serious environmental problems. At the same time, several large-scale power outages occurred at the beginning of this century, which made the operation and maintenance of large power grid difficult to meet the increasing demand for power quality. Large power grids are also easy to be targeted militarily. Once attacked, the power system will be cut off and all the facilities that rely on electricity will be paralyzed. The microgrid provides a new way to solve these problems. Microgrid integrates distributed power generation, energy storage unit and coordinated control into an autonomous system, which can exchange energy with large power grid and provide power for system load independently. Research on microgrid technology is urgently needed to rely on practical engineering. Based on this, this subject begins to design an island microgrid system. Firstly, the overall scheme design of island microgrid is carried out. This paper introduces the current situation of power supply and demand of island microgrid, and analyzes the demand of power supply, and compares the advantages and disadvantages of AC microgrid scheme and DC microgrid scheme in the project implementation location respectively. The advantages of DC microgrid with mixed energy storage in this project are analyzed, and the equipment selection in island microgrid is selected, and the overall design scheme of island microgrid is determined. Secondly, the design of the converter in the microgrid. The converter is the key equipment of microgrid control. In this paper, five converters in the subject are divided into three types. The three types of converters are designed from the aspects of topology design and selection of internal main components. The structure of the converter control module is introduced, and the method of detecting and driving the converter control module is given. Thirdly, aiming at the problem of coordinated control between distributed generation unit and hybrid energy storage in island microgrid, a hierarchical coordinated control strategy based on DC bus voltage is proposed. The realization methods of each converter control mode running under this control method are described respectively. Then, an island microgrid monitoring system based on Kunlun on-state MCGS configuration software is built. Not only the functions of data display, curve and report output, fault record and so on are realized, but also the coordination and control methods mentioned above are embedded in the monitoring system, and the intelligent and unattended island microgrid is realized. Finally, the system experiment is carried out. The anti-disturbance ability of the system in off-grid mode and the fluctuation of the output curve of the system in off-grid switching are observed respectively. The experimental results show that the system can run stably.
【学位授予单位】：山东建筑大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM727

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