Decentralized Disturbance Observer-Based Sliding Mode Load Frequency Control in Multiarea Interconnected Power Systems

The load frequency control (LFC) problem in interconnected multiarea power systems is facing more challenges due to increasing uncertainties caused by the penetration of intermittent renewable energy resources, random changes patterns, system parameters and unmodeled dynamics, leading a compromised reliability risk outages. In responding this problem, paper proposes decentralized disturbance observer-based sliding mode LFC scheme for interlinked with external disturbances. First, reduced order constructed lumping disturbances from tie-line deviations, variations output resources. observer then designed estimate lumped disturbance, which further utilized construct novel integral-based surface. necessary sufficient conditions determine tuning surface are formulated terms linear matrix inequalities (LMIs), thus guaranteeing that resultant dynamics meet H∞ performance requirements. controller synthesized drive trajectories onto predesigned finite time presence disturbance. From practical perspective, merit proposed method minimizes impact on frequency, has not been considered date design. Numerical simulations illustrated validate effectiveness strategy verify its advantages over other approaches.