基于改进下垂控制的直流微网运行研究

李靖; 王志和; 倪浩

doi:10.12096/j.2096-4528.pgt.21003

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基于改进下垂控制的直流微网运行研究

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- 基于改进下垂控制的直流微网运行研究
- Research on DC Microgrid Operation Based on Improved Droop Control
- 发电技术 2021年42卷第6期页码：765-774
- 作者机构：
  
  1.内蒙古工业大学电力学院, 内蒙古自治区呼和浩特市 010080
  2.内蒙古电能变换传输与控制重点实验室(内蒙古工业大学), 内蒙古自治区呼和浩特市 010080
- 作者简介：
  
  [ "李靖(1992), 男, 硕士研究生, 研究方向为新能源发电技术, 1125409232@qq.com" ]
  王志和(1963), 男, 硕士, 教授, 研究方向为电力电子系统建模与控制, 本文通信作者, wangzh@imut.edu.cn
  [ "倪浩(1992), 男, 硕士研究生, 研究方向为新能源发电技术" ]
- 基金信息：
  
  国家自然科学基金项目(51767019)
- DOI：10.12096/j.2096-4528.pgt.21003
  中图分类号： TK01;TM76
- 收稿：2021-02-10，
  
  纸质出版：2021-12-31
- 稿件说明：
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李靖, 王志和, 倪浩. 基于改进下垂控制的直流微网运行研究[J]. 发电技术, 2021,42(6):765-774.

Jing LI, Zhihe WANG, Hao NI. Research on DC Microgrid Operation Based on Improved Droop Control[J]. Power Generation Technology, 2021, 42(6): 765-774.
李靖, 王志和, 倪浩. 基于改进下垂控制的直流微网运行研究[J]. 发电技术, 2021,42(6):765-774. DOI： 10.12096/j.2096-4528.pgt.21003.

Jing LI, Zhihe WANG, Hao NI. Research on DC Microgrid Operation Based on Improved Droop Control[J]. Power Generation Technology, 2021, 42(6): 765-774. DOI： 10.12096/j.2096-4528.pgt.21003.

摘要

以光伏阵列发电、锂电池储能、直流负荷和网侧变换器组成的直流微网为研究对象，将整个系统分为6种运行模式，通过不同工作模式的转换运行研究该微网的协调控制策略。锂电池分为2组，为提高电池和系统整个运行效率，优化电池的工作特性，引入了能量均衡的思想，将能量均衡算法和基于蓄电池荷电状态量的下垂控制相结合，以此达到2组锂电池功率均衡的目的。利用Matlab/Simulink仿真软件搭建了该系统的仿真模型，通过改变负荷功率的大小实现系统运行的变化，仿真结果表明，直流母线电压保持恒定，整个系统的功率达到了平衡，验证了系统协调控制策略的可行性。

Abstract

Taking photovoltaic array power generation

lithium battery energy storage

DC load and grid-side converter as the research objects

the whole system was divided into 6 working modes

and the coordinated control strategy of the microgrid was studied through the conversion operation of different working modes. The lithium battery was divided into two groups. In order to improve the efficiency of the battery and the whole system and optimize the working characteristics of the battery

the idea of energy balance was introduced

and the energy balance algorithm was combined with the droop control based on the state of charge value

which helped to achieve power balance of two groups of lithium batteries. The simulation model of the system was built using Matlab/Simulink software. The change of system operation was realized by changing the size of load power. The simulation results show that the DC bus voltage keeps constant

the power balance of the entire system is realized

and the feasibility of the coordinated control strategy of the system is verified.

关键词

Keywords

references

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