Robust Load Frequency Control of Power Systems Against Random Time-Delay Attacks

This letter presents a perturbation estimation based robust load frequency control (LFC) scheme for power system subject to random time-delay attack. Perturbation term is defined to describe the measurement deviation caused by random time-delay attack. Besides, perturbation observer is designed to estimate the system perturbation. The load frequency controller is compensated based on the perturbation estimation to mitigate the random time-delay attack and ensure the stable operation of power system. Case studies are undertaken on a two-area LFC model to demonstrate the control performance of the scheme.

Automated summary

This letter introduces a robust load frequency control scheme based on perturbation estimation to deal with random time-delay attacks in power systems. The system's perturbation is estimated using a perturbation observer, and the load frequency controller is adjusted accordingly to mitigate the attacks and ensure stable operation. Case studies on a two-area LFC model demonstrate the effective control performance of the scheme.