直流微电网并网双端口变流站主从式控制研究

发布时间：2018-02-24 23:13

本文关键词： 直流微电网分布式电源并网接口控制策略最大功率跟踪　出处：《河北科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着能源短缺和环境污染等问题变得越来越严重,急需寻找清洁的新能源来解决目前的问题。而太阳能发电这种环保的发电方式得到了人们的认可。科学技术不断提高,直流负载的应用持续增加,导致供电方式发生变化,促进了直流微电网的发展。直流微电网的结构由分布式再生能源发电模块、储能模块和负载模块等组成。为了实现能量的协调控制以及保证供电的安全性和稳定性问题,就需要采用恰当的策略对直流微网进行控制。本文主要是对由太阳能电池阵列、蓄电池组和可控负载等组成的主从式直流微电网系统进行分析,运用分层控制策略来实现直流微电网的稳定运行。本文首先对光伏发电系统、储能装置以及变换器的特性进行了分析,并对发电模块中的最大功率追踪原理和储能模块的控制方法进行了详细的研究,为实现对整个系统的控制奠定了基础。然后对多台逆变器的并联问题进行了分析。最后在Matlab/Simulink环境下搭建了层次控制下的仿真模型,通过仿真验证所提出的控制策略的有效性。
[Abstract]:As energy shortages and environmental pollution become more and more serious, there is an urgent need to find clean new sources of energy to solve the current problem. Solar power, an environmentally friendly form of power generation, has gained recognition. Science and technology are constantly improving. The application of DC load continues to increase, which leads to the change of power supply mode and promotes the development of DC microgrid. In order to realize the coordinated control of energy and ensure the security and stability of power supply, it is necessary to adopt the appropriate strategy to control the DC microgrid. The master-slave DC microgrid system composed of battery group and controllable load is analyzed, and the hierarchical control strategy is used to realize the stable operation of DC microgrid. The characteristics of energy storage device and converter are analyzed, and the principle of maximum power tracking and the control method of energy storage module are studied in detail. It lays a foundation for the control of the whole system. Then the parallel problem of multiple inverters is analyzed. Finally, the simulation model under hierarchical control is built in Matlab/Simulink environment, and the effectiveness of the proposed control strategy is verified by simulation.
【学位授予单位】：河北科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM727

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