Bandwidth Based Approach for Mitigation of Delay-Cyberattacks of Load Frequency Control Via LADRC

Modern power systems are prone to cyberattacks due to sophisticated computer networks and open communication channels. Delay cyberattack is one of a few dangerous cyberattacks that can happen in power systems. It can quickly destabilize the whole power system's operation. Due to this, the mitigation of delay-based cyberattacks is an important topic. This paper proposes a heuristic linear active disturbance controller (LADRC) tuning approach for mitigation of time delay cyberattack. In this paper, first, the “bandwidth parameterization” method of tuning is explained using the controller bandwidth and observer bandwidth. Afterwards, a new linear active disturbance controller (LADRC) tuning approach is presented. Finally, proposed method of LADRC controller tuning is validated on the a single area load frequency control problem under a delay-based cyberattack. Simulations in MATLAB/Simulink are used to validate the proposed LADRC controller.