ROBUST POWER SYSTEM LOAD‐FREQUENCY CONTROLLER DESIGN BASED ON H_∞ OPTIMIZATION APPROACH

Abstract

SUMMARY An H ∞ controller based on the standard H ∞ control design approach is proposed for power system load‐frequency control with system parametric uncertainties. The variation bounds of power system parameters are obtained by changing parameters by 30%‐50% simultaneously from their typical values. The existing H ∞ control technique is applied to design a load‐frequency controller for power systems. The design procedure is given. The proposed H ∞ controller is simple, effective and can ensure that the overall system is asymptotically stable for all admissible uncertainties. Our simulation results show that for the example system the proposed H ∞ load‐frequency controller can achieve good performance even in the presence of generation rate constraint.