Nonfragile power and frequency control in islanded microgrids under abnormal asynchronous stochastic cyber attacks

Sheng Han; Qishui Zhong; Kaibo Shi; Oh-Min Kwon; Xiao Cai; Shouming Zhong

doi:10.1016/j.isatra.2023.09.012

Nonfragile power and frequency control in islanded microgrids under abnormal asynchronous stochastic cyber attacks

ISA Trans. 2023 Dec:143:409-419. doi: 10.1016/j.isatra.2023.09.012. Epub 2023 Sep 20.

Authors

Sheng Han¹, Qishui Zhong², Kaibo Shi³, Oh-Min Kwon⁴, Xiao Cai⁵, Shouming Zhong⁶

Affiliations

¹ Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, PR China; School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, PR China. Electronic address: gracehansheng@gmail.com.
² School of Aeronautics and Astronautics, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, PR China. Electronic address: zhongqs@uestc.edu.cn.
³ Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, PR China; School of Electronic Information and Electrical Engineering, Chengdu University, Chengdu, Sichuan 610106, PR China. Electronic address: skbs111@163.com.
⁴ School of Electrical Engineering, Chungbuk National University, Chungdae-ro, Seowon-Gu, Cheongju 28644, South Korea. Electronic address: madwind@chungbuk.ac.kr.
⁵ School of Information and Software Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, PR China. Electronic address: caixiao327327@163.com.
⁶ School of Mathematics Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, PR China. Electronic address: zhongsm@uestc.edu.cn.

PMID: 37758524
DOI: 10.1016/j.isatra.2023.09.012

Abstract

In this paper, we focus on the real power sharing and frequency regulation of distributed generators in islanded microgrids with abnormal asynchronous stochastic cyber attacks, which is of great significance to the information security and stable operation of microgrids. Firstly, considering the possible cyber attacks in the communication network, a distributed non-fragile controller with coupled memory delay is proposed according to the nonperiodic sampled-data control. Then, the construction of delay-dependent two-sided looped-functional makes the Lyapunov-Krasovskii functional contain more delay and sampling information and relaxes constraints on free matrices. In addition, based on the enhanced integral inequality technique and the linear convex combination method, a sampling-based consensus protocol is presented to solve the issues of real power sharing and frequency regulation in the islanded microgrids. Finally, to verify the effectiveness and feasibility of the designed control strategy, a modified IEEE 34-bus test system is used for the experiment.

Keywords: Cyber attacks; Distributed control; Lyapunov–Krasovskii functional; Microgrids; Sampled-data control.