Load Frequency Control for Multi-area Power Systems with Renewable Energy Penetration

This paper is concerned with the problem of load frequency control for multi-area power systems with renewable energy sources penetration which increase the instability of the interconnected power system because of system inertia reduction. In order to tackle this problem, by using the virtual inertia control technique, a new load frequency control model has been proposed to improve frequency stability of the interconnected power system due to the negative impact causing by renewable energy sources. Firstly, load frequency scheme with network induced delays is formulated for multi-area power systems. Secondly, by using the Lyapunov theory and linear matrix inequalities (LMIs) technique, stabilization criteria and H-infinity controller for the multi-area power systems are derived. Finally, a case study demonstrates the effectiveness and merits of the present method.