Open AccessDetection‐based weighted H ∞ LFC for multi‐area power systems under DoS attacks
Author(s) -
Cheng Zihao,
Yue Dong,
Hu Songlin,
Xie Xiangpeng,
Huang Chongxin
Publication year - 2019
Publication title -
iet control theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.059
H-Index - 108
eISSN - 1751-8652
pISSN - 1751-8644
DOI - 10.1049/iet-cta.2018.6469
Subject(s) - control theory (sociology) , denial of service attack , actuator , piecewise , aperiodic graph , computer science , set (abstract data type) , scheme (mathematics) , power (physics) , stability (learning theory) , electric power system , mathematics , control (management) , physics , quantum mechanics , artificial intelligence , mathematical analysis , the internet , combinatorics , machine learning , world wide web , programming language
This study is concerned with resilient load frequency control (LFC) scheme design of multi‐area power systems with communication delay and aperiodic denial‐of‐service (DoS) attacks. First, to identify DoS attacks, a detection mechanism in the actuator side is proposed which is a time counter measuring the input delay. The identified DoS attacks are constrained by its upper bound of frequency and duration. When DoS attacks are identified, actuator switches to zero‐input strategy from hold‐input strategy. According to the switching control inputs, switched time delay system model is established to describe the attack influence on LFC system. Further, a criterion of preserving weighted H ∞ performance is derived by combining piecewise Lyapunov–Krasovskii functional method with switched system method. Based on the criterion, the resilient control gain is designed by solving a set of LMIs. Finally, numerical simulations are given to verify the validness of the attack detection based resilient LFC scheme.