Distributed Optimal Synchronization Rate Control for AC Microgrids Under Event-Triggered Mechanism

With the development of distributed generation (DG) technologies, distributed energy resources (DERs) with low capacity and low inertia are highly penetrated in the islanded AC microgrid. This has highlighted the need for secondary control strategies to remedy frequency deviation and strongly limita...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on power systems 2021-05, Vol.36 (3), p.1780-1793
Main Authors: Yu, Chang, Zhou, Hong, Lu, Xiaoqing, Lai, Jingang, Liu, Guo-Ping
Format: Article
Language:English
Subjects:
Ac microgrid
Convergence
distributed control
Distributed generation
Distributed power generation
Energy sources
event-triggered mechanism
Frequency control
Frequency deviation
Frequency synchronization
Microgrids
Process control
Stability analysis
Synchronization
synchronization rate
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:With the development of distributed generation (DG) technologies, distributed energy resources (DERs) with low capacity and low inertia are highly penetrated in the islanded AC microgrid. This has highlighted the need for secondary control strategies to remedy frequency deviation and strongly limitation of the frequency synchronization rate, which are associated with the primary control. To solve this problem, an optimal condition, in terms of explicit synchronization rate formula, is derived. Then, a distributed event-triggered control strategy is proposed to synchronize the microgrid frequency to the nominal value and maximize the synchronization rate for the primary control process. To reduce the communication and computation burdens, an event-triggered mechanism that enables each agent to update its input based on discrete information from only one of its neighbors are provided. The stability of the event condition and event interval are also analyzed using Lyapunov method. Finally, the theoretical results are applied to a parallel-feeder test system consisting of fourteen DGs, which verifies the effectiveness of the proposed strategy.
ISSN:0885-8950
1558-0679
DOI:10.1109/TPWRS.2020.3035688