期刊
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
卷 23, 期 8, 页码 12191-12201出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TITS.2021.3110759
关键词
Power system stability; Stability criteria; Delays; Frequency control; Symmetric matrices; Power system dynamics; Oscillators; H∞ LFC; event-triggered control; nonlinear power systems; Lyapunov method; NPI-control
资金
- Sichuan Science and Technology Plan [2020YFH0098, 21YYJC0469]
- Fundamental Research Funds for the Central Universities [ZYGX2019J081]
- China Postdoctoral Science Foundation [2020M683274, 2021T140092]
- Open Research Project of the State Key Laboratory of Industrial Control Technology, Zhejiang University, China [ICT2021B38]
- Guangdong Basic and Applied Basic Research Foundation [2021A1515011692]
This article presents a new event-triggered $H_{infinity}$ load frequency control approach with dynamic triggered algorithm and non-fragile proportional integral control strategy, aiming to reduce the communication bandwidth usage and data computation burden in multi-area nonlinear power systems.
In this article, a new event-triggered $H_{infinity}$ load frequency control (LFC) approach with dynamic triggered algorithm (DTA) for multi-area nonlinear power systems (NPSs) based on non-fragile proportional integral control (NPI-control) strategy is addressed. Firstly, different from the existing linear single-area LFC model for power systems, an improved nonlinear multi-area model with the performance of large-scale adjustment frequency fluctuation is constructed by considering the phenomenon of overshoots and long-term oscillations. Due to the existence of control uncertainty, it is the first time that the NPI-control scheme is applied to LFC approach for NPSs. Then, the DTA is proposed to adjust the dynamic event-triggered parameters, which reduces the occupation of communication bandwidth and the data computation of NPSs. Furthermore, a modified quadratic form with time-varying matrix and two-side closed functional method are adopted to construct the relaxed Lyapunov-Krasovskii functional, where some slack matrices are unnecessarily positive definite. Based on Lyapunov method, some less-conservatism stability criteria are derived. Utilizing the linear matrix inequality toolbox, the allowable upper bound of time-varying delays and the NPI-controller are obtained. Finally, a numerical example is presented to demonstrate the availability of the approach developed in this work.
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