Distributed Coordinated Control of AC Microgrids Based on Grid-supporting Inverters

被引：0
|
作者：
Wei S. [1 ,2 ]
Gao F. [1 ,2 ]
Liao D. [1 ,2 ]
Yan C. [3 ]
Cai W. [4 ]
Liu D. [1 ,2 ]
机构：
[1] Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education, Shanghai Jiao Tong University, Shanghai
[2] Department of Electrical Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai
[3] Huaian Power Supply Branch, State Grid Jiangsu Electric Power Co., Ltd, Huaian
[4] Shanghai Institute of Space Power-Source, Shanghai
来源：
Gaodianya Jishu/High Voltage Engineering | 2023年 / 49卷 / 01期
关键词：
AC microgrid; diffusion algorithm; distributed coordinated control; droop control; grid-supporting inverter; hierarchical control;
D O I：
10.13336/j.1003-6520.hve.20211306
中图分类号：
学科分类号：
摘要：
In a droop-based hierarchical control, the primary control has the inherent compromise between voltage regulation performance and power distribution, and the secondary control is commonly installed to solve these problems in a long-time scale, which significantly affects the system stability. To solve these problems, this paper proposes a distributed cooperative control strategy for grid supporting inverters-based AC microgrid. This strategy is independent of droop mechanism. Firstly, a weight coefficient is introduced to coordinate the load proportion born by each distributed generation. Secondly, distributed control and diffusion algorithm are adopted in voltage regulator, reactive power regulator, and active power regulator,and the power sharing and voltage/frequency regulation are controlled on the basis of the diffusion algorithm. The convergence performance of diffusion algorithm and consensus algorithm is analyzed theoretically. In addition, by comparison with droop-based hierarchical control, the consensus algorithm-based cooperative control strategy is conducted in simulation. The results show that, the proposed strategy has high stability and can realize high-quality voltage/frequency regulation and accurate power sharing can be realized in the case of line impedance mismatch, load mutation, communication link failure, inverter failure and communication delay. © 2023 Science Press. All rights reserved.
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页码：269 / 278
页数：9
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