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Peng et al. Intell Robot 2022;2(3):298­312 Intelligence & Robotics
DOI: 10.20517/ir.2022.27

Research Article Open Access

Networked scheduling for decentralized load frequency
control

Chen Peng , Hongchenyu Yang 1
1
1 School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China.

Correspondence to: Prof. Chen Peng, School of Mechatronic Engineering and Automation, Shanghai University, No. 99, Shangda
Road, Baoshan District, Shanghai 200444, China. E-mail: c.peng@shu.edu.cn
How to cite this article: Peng C, Yang H. Networked scheduling for decentralized load frequency control. Intell Robot 2022;2(3):298-
312. http://dx.doi.org/10.20517/ir.2022.27.

Received: 14 Aug 2022 First Decision: 17 Aug 2022 Revised: 30 Aug 2022 Accepted: 1 Sep 2022 Published: 3 Sep 2022
Academic Editor: Simon X. Yang Copy Editor: Jia-Xin Zhang Production Editor: Jia-Xin Zhang

Abstract
This paper investigates the scheduling process for multi-area interconnected power systems under the shared but
band-limited network and decentralized load frequency controllers. To cope with sub-area information and avoid
node collision of large-scale power systems, round-robin and try-once-discard scheduling are used to schedule sam-
pling data among different sub-grids. Different from existing decentralized load frequency control methods, this paper
studies multi-packet transmission schemes and introduces scheduling protocols to deal with the multi-node collision.
Considering the scheduling process and decentralized load frequency controllers, an impulsive power system closed-

loop model is well established. Furthermore, sufficient stabilization criteria are derived to obtain decentralized ∞
output feedback controller gains and scheduling protocol parameters. Under the designed decentralized output feed-
back controllers, the prescribed system performances are achieved. Finally, a three-area power system example is
used to verify the effectiveness of the proposed scheduling method.

Keywords: Multi-area power systems, round-robin scheduling, try-once-discard scheduling, load frequency control

1. INTRODUCTION
With the vigorous development of power markets, the degree of interconnection among power grid regions is
increasing. At present, power grids have developed into multi-area interconnected power systems [1,2] . Gen-
erally, there are two communication schemes to transmit data between neighborhood areas, that is, the dedi-
cated channel and the open infrastructure. Since the latter has outstanding advantages over the former, such

© The Author(s) 2022. Open Access This article is licensed under a Creative Commons Attribution 4.0
International License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, shar­
ing, adaptation, distribution and reproduction in any medium or format, for any purpose, even commercially, as long as you
give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate
if changes were made.

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