Load frequency control for power systems considering communication delays and sampling periods

被引：0

作者：

Lian H.-H. ^{[1
]}

Qin S.-G. ^{[1
]}

Xiao S.-P. ^{[2
]}

Li M.-F. ^{[1
,3
]}

Xiao H.-Q. ^{[2
]}

机构：

[1] School of Wind Energy Engineering, Hunan Electrical College of Technology, Hunan, Xiangtan

[2] School of Electrical and Information Engineering, Hunan University of Technology, Hunan, Zhuzhou

[3] School of Electrical and Information Engineering, Hunan University, Hunan, Changsha

来源：

Kongzhi Lilun Yu Yingyong/Control Theory and Applications | 2023年 / 40卷 / 05期

基金：

中国国家自然科学基金;

关键词：

communication delays; LFC; Lyapunov functional; power systems; sampled-data periods;

D O I：

10.7641/CTA.2021.10643

中图分类号：

学科分类号：

摘要：

This paper proposes a delay/sampled-dependent discrete load frequency control (LFC) scheme for the load frequency stability control problem of power systems. First, a LFC model of closed-loop power systems is established by considering the impact of both transmission delays of communication network and sampling periods of feedback signals on the systems. Then, based on the LFC model, by employing a two-side looped Lyapunov functional and LMI technique, a less conservative and delay/sampled-dependent stability criterion and a controller design approach are developed, which guarantee that the proposed control scheme can maintain the system stable operation in a larger communication delay and sampling period. Finally, a one-area power system and a three-area power system are applied to verify the effectiveness of the proposed approach. It is demonstrated from the simulation that the proposed LFC scheme has better control performance and robustness than others in the existing literature, and it can also improve dynamic performance of the power systems under the communication delay of a certain size. © 2023 South China University of Technology. All rights reserved.

引用

页码：891 / 902

页数：11

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