Flexible power flow control strategy for interlinking converter in AC/DC hybrid microgrid

被引：0
|
作者：
Shi J. [1 ]
Li Y. [1 ]
Wang Z. [1 ]
He L. [1 ]
Cao Y. [1 ]
机构：
[1] College of Electrical and Information Engineering, Hunan University, Changsha
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2018年 / 38卷 / 11期
基金：
中国国家自然科学基金;
关键词：
AC/DC hybrid microgrid; Droop control; Interlinking converter; Power control; Virtual inertia;
D O I：
10.16081/j.issn.1006-6047.2018.11.016
中图分类号：
学科分类号：
摘要：
To address the issues of dynamic power balance in AC/DC hybrid microgrid and the low utilization of distributed generators, a novel flexible power flow control strategy for interlinking converter in hybrid microgrid is proposed, which can flexibly allocate power without the requirement of communication. Firstly, the droop control mode of distributed generators connected by AC and DC sub-microgrids is analyzed in detail. Secondly, based on the characteristics of interlinking converter, which is required to maintain the stability of AC microgrid frequency and DC bus voltage as well as the bidirectional power transmission, the virtual inertia of hybrid microgrid AC/DC interface is analyzed. At the same time, the linear coupling relationship between the AC frequency and DC voltage is deduced to accomplish the mutual support of AC/DC power at both sides. Finally, a typical AC/DC hybrid microgrid model is built on the DIgSILENT simulation platform, based on which the proposed power control strategy of interlinking converter is validated. Simulative results show that the proposed control strategy can effectively maintain the power balance at both sides and improve the power quality under the islanded mode, which fully exploits the power adjustment capability of distributed generators. © 2018, Electric Power Automation Equipment Press. All right reserved.
引用
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页码：107 / 113
页数：6
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