Resilient fixed-order distributed dynamic output feedback load frequency control design for interconnected multi-area power systems

Abstract

The paper proposes a novel H-&#x221E load frequency control &#x0028 LFC &#x0029 design method for multi-area power systems based on an integral-based non-fragile distributed fixed-order dynamic output feedback &#x0028 DOF &#x0029 tracking-regulator control scheme. To this end, we consider a nonlinear interconnected model for multi-area power systems which also include uncertainties and time-varying communication delays. The design procedure is formulated using semi-definite programming and linear matrix inequality &#x0028 LMI &#x0029 method. The solution of the proposed LMIs returns necessary parameters for the tracking controllers such that the impact of model uncertainty and load disturbances are minimized. The proposed controllers are capable of receiving all or part of subsystems information, whereas the outputs of each controller are local. These controllers are designed such that the resilient stability of the overall closed-loop system is guaranteed. Simulation results are provided to verify the effectiveness of the proposed scheme. Simulation results quantify that the distributed &#x0028 and decentralized &#x0029 controlled system behaves well in presence of large parameter perturbations and random disturbances on the power system.