直流微电网中能量协调控制策略的研究

doi:10.16182/j.issn1004731x.joss.22-0160

系统仿真学报 ›› 2023, Vol. 35 ›› Issue (6): 1215-1225.doi: 10.16182/j.issn1004731x.joss.22-0160

直流微电网中能量协调控制策略的研究

卢自宝¹^,²(), 丁浩¹, 孙方云¹, 丁梓琼¹, 龚莉¹, 郑睿¹^,²

^1.安徽师范大学物理与电子信息学院，安徽芜湖 241000
^2.安徽智能机器人信息融合与控制工程实验室，安徽芜湖 241000

收稿日期:2022-03-03 修回日期:2022-03-22 出版日期:2023-06-29 发布日期:2023-06-20
作者简介:卢自宝(1985-)，男，副教授，博士，研究方向为微电网控制技术。E-mail：luzibao@163.com
基金资助:
国家自然科学基金面上项目(62071005);安徽省自然科学基金(2008085MF199)

Research on Energy Coordination Control Strategy in DC Microgrid

Zibao Lu¹^,²(), Hao Ding¹, Fangyun Sun¹, Ziqiong Ding¹, Li Gong¹, Rui Zheng¹^,²

^1.College of Physics and Electronic Information, Anhui Normal University, Wuhu 241000, China
^2.Anhui Provincial Engineering Laboratory on Information Fusion and Control of Intelligent Robot, Wuhu 241000, China

Received:2022-03-03 Revised:2022-03-22 Online:2023-06-29 Published:2023-06-20

摘要/Abstract

摘要：

为解决直流微电网中母线电压稳定和能量流动平衡的问题，提出了基于直流微电网能量平衡关系的切换控制策略，将直流微电网的母线电压平衡转化为能量平衡，并将直流微电网建模为具有5种模式的线性切换系统，针对每种模式设计了稳定母线电压的控制器；为实现模式之间的无缝平滑切换，在任意切换稳定的基础上，针对微电网的能量流动特点，给出相应的模式切换规则。通过理论分析可知，该切换控制策略能够很好地实现母线电压稳定和能量平衡，对单一模式以及模式之间的切换进行了仿真研究，结果表明：该控制策略能在功率不平衡时，将母线电压波动控制在额定电压的 $± 5 %$ 以内并能快速恢复到期望电压。

关键词: 直流微电网, 切换控制策略, 母线电压平衡, 能量平衡, 线性切换系统

Abstract:

Aiming of the bus voltage stability and energy flow balance in DC microgrids, a switching control strategy based on the energy balance relationship of DC microgrid is proposed. The bus voltage balance of DC microgrid is transformed into energy balance, and DC microgrid is modeled as a linear switching system with five modes. A controller is designed for each mode to stabilize the bus voltage. To achieve the seamless and smooth switching between modes, on the basis of maintaining the stability of any switching, the corresponding mode switching rules are given based on the energy flow characteristics of microgrid. Theoretical analysis shows that the switching control strategy can effectively achieve bus voltage stability and energy balance. The results of simulation on both individual modes and mode switching show that the control strategy can control bus voltage fluctuations within $± 5 %$ of the rated voltage and quickly return to the desired voltage in the case of power imbalance.

Key words: DC microgrid, mode switching strategy, bus voltage balance, energy balance, linear switching system

中图分类号:

TP391.9

卢自宝, 丁浩, 孙方云, 丁梓琼, 龚莉, 郑睿. 直流微电网中能量协调控制策略的研究[J]. 系统仿真学报, 2023, 35(6): 1215-1225.

Zibao Lu, Hao Ding, Fangyun Sun, Ziqiong Ding, Li Gong, Rui Zheng. Research on Energy Coordination Control Strategy in DC Microgrid[J]. Journal of System Simulation, 2023, 35(6): 1215-1225.

图/表 10

图1

图2

图3

表1

运行模式及工作条件

模式	工作条件	母线调节单元
1	$P D G - P L o a d - P E S S - c h > P g a$	可再生能源
2	$0 < P D G - P L o a d - P E S S - c h < P g a$	大电网
3	$0 < P D G - P L o a d < P E S S - c h$	储能单元
4	$0 < P D G + P E S S - d c h - P L o a d < P E S S - d c h$	储能单元
5	$P D G + P E S S - c h - P L o a d < 0$	大电网

表1

图4

图5

图6

图7

图8

图9

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直流微电网中能量协调控制策略的研究

Research on Energy Coordination Control Strategy in DC Microgrid

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