Gain-Scheduling Event-Triggered Load Frequency Control in Power Systems Under Delay Attacks

Abstract

AbstractThis paper proposes a resilient event-triggered load frequency control scheme based on gain scheduling against the time delay attacks. Based on a series of possible delay intervals representing different attack intensities, the corresponding controller gains are obtained by constructing a Lyapunov functional. Then, under the switching control framework, the controller switching criteria are strictly derived. The control center can switch the most matched event trigger control parameters to the control loop according to the actual transmission delays. Numerical simulation results show that compared with the existing event triggered control schemes, the proposed method reduces the conservatism and improves the control performance with less additional search time consumption.KeywordsLoad frequency controlDelay attackAdaptive event-triggered control