A novel observer-based approach to delay-dependent LFC of power systems with actuator faults and uncertain communications conditions. (October 2021) - Arunagirinathan, S.
Highlights: The proposed power system has been demonstrated in the form of the stochastic closed-loop system with probabilistic interval delays. Compared with existing LFC systems, output data missing scheme and occurring actuator faults in the control system are taken into account. A new form of Lyapunov Krasovski's Functional is developed to obtain the sufficient condition for the asymptotic stability of proposed error system based on observer method by utilizing integral inequalities in the form of linear matrix inequalities (LMIs). Estimated feasible region for the stability of one- and two-area load frequency system for the power system is substantially increased when compared to those in the existing literature. Abstract: In this paper, a novel observer-based approach is proposed for the delay-distribution-dependent (DDD) load frequency control (LFC) of multi-area power systems with actuator faults and probabilistic communication conditions. LFC is designed considering missing data which obey the Bernoulli distribution and actuator faults. After that, an observer gain matrix is constructed for realizing Lyapunov stability, where delay-dependent stability criteria are derived under the consideration of different factors such as packet dropout during data transmission and faults in control. The stability conditions are derived in terms of linear matrix inequalities to achieve less conservative results in the communication delay and H ∞ performance. Finally, the efficiency of the proposed observer-based DDD LFC is demonstrated and compared through time-domain simulations.