摘要
综述了国内外直流微电网控制技术的研究现状。首先,针对直流微电网具有底层复杂、上层简单且已完全电力电子化的物理特性,指出直流微电网在结构与控制技术上与交流电网的差别;其次,在描述直流微电网基本结构的基础上阐述了直流微电网控制技术的分类与组成,指出底层控制是维持整个系统稳定运行的基石,而协调层控制通过设置各功率接口的工作模式和控制参数来实现系统的功率平衡和母线电压稳定;对底层控制中的电压电流控制、最大功率跟踪、荷电状态控制和电流分配机制进行分析,并对协调层控制中的分散控制、分布式控制与集中控制进行分析与比较。最后,指出不同控制技术适合的应用场景,并且展望了直流微电网控制技术未来的发展趋势。
This paper summarizes the current situation and development trend of control techniques for DC micro-grid. Considering that the DC micro-grid is a pure power electronic system with complex bottom layer and simple upper layer, it firstly points out the differences of structure and control technique between the DC micro-grid and AC grid. Then, based on the description of the basic structure, it states classification and composition of control techniques for the DC micro-grid. Meanwhile, it points out that the bottom layer control is the cornerstone for maintaining stable operation of a whole DC micro-grid, and the coordination layer control is used to realize power balance and bus voltage stability by setting operation mode and control parameters for each power interface. It also analyzes voltage and current control, the maximum power tracking, the state of charge control and the current distribution mechanism in the bottom layer, as well as the decentralized control, distributed control and centralized control in the coordination layer. Finally, it points out the application scenarios of different control techniques, and prospects the future development trend of DC micro-grid control technology.
作者
姜碧佳
叶远茂
JIANG Bijia;YE Yuanmao(School of Automation,Guangdong University of Technology,Guangzhou,Guangdong 510006,China)
出处
《广东电力》
2020年第5期1-10,共10页
Guangdong Electric Power
基金
国家自然科学基金项目(51907033)
广东省自然科学基金项目(2017A030313316)。
关键词
直流微电网
协调控制
底层控制
下垂控制
电流共享机制
DC micro-grid
coordinated control
bottom layer control
droop control
current sharing mechanism
