A novel observer-based approach to delay-dependent LFC of power systems with actuator faults and uncertain communications conditions

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.