This assessment represents a Multi-Input-Multi-Output-Proportional-Integral-Derivative (MIMO-PID) controller for load frequency balance issues.The objective of load frequency control is to minimize the transient deviations in area frequency and tie-line power. To improve the robustness of the system the transfer function H ∞ norm is used. So the proposed technique is known as PIDH ∞ controller. The LFC problem is articulated as a H ∞ SOF (State Output Feedback) control approach to attain the decentralized robust MIMO-PIDH ∞ controller. H ∞ controller is used here for accomplishing stabilization with definite performance. The optimization difficult is formulated and iterative LMI algorithm is used to tune the control parameters of the MIMO-PIDH ∞ controller. The simulation results show the proposed strategy is very effective and guaranteed good robust performance against the parametric uncertainties and load changes.
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