Effect of Simultaneous FDI and DoS Attack of Multi-Area Power System with Dynamic Event-Triggering Algorithm

The twenty-first century comes with advancements in information technology, which positively upgrades the conventional communication infrastructure. However, this improvement comes at the price of compromised system security. Broadly, the attackers can hamper normalcy in any system in two ways: firstly, falsifying data through the network in a false data injection (FDI) type attack; secondly, the attackers will make the network unavailable for communication in denial of service (DoS) attack. Lately, in a real-world scenario, the attackers are incorporating hybrid attacks, i.e., combining the above-mentioned attacks to damage the system performance further. The automatic load frequency control (ALFC) incorporated in modern smart grids relies on communication channels, so any interference in data can result in frequency diversion and instability in the system. Thus, a resilient $H$∞ controller, which is verified to be exponentially stable, designed by Lyapunov Krasovskii functional (LKF), is implemented in this work. The dynamic event-triggering algorithm (DETA) scheme is also incorporated with the controller to save on bandwidth use. The linear matrix inequality (LMI) method is used to find the controller's gain and weight of the event-triggered system of the three-area power system to verify the effectiveness of the designed controller.