  Defense against cyberattacks is an emerging topic related to fault-tolerant
control. In order to avoid difficult mathematical modeling, model-free control
(MFC) is suggested as an alternative to classical control. For illustration
purpose a Load Frequency Control of multi-areas power network is considered. In
the simulations, load altering attacks and Denial of Service (DoS) in the
communication network are applied to the system. Our aim is to compare the
impact of cyberattacks on control loops closed via respectively a classical
controller in such situations and a model-free one. Computer experiments show
impressive results with MFC.
