Abstract
In this article, a robust load frequency controller is designed by adopting H ∞ loop shaping design procedure given in [1]. Using a selected pre-compensator, the singular values of the nominal system are modified to satisfy the requirements for closed-loop performance specifications along with the sufficient robust stability margin of the system. The design of stabilizing controller for the perturbed plant is performed in the framework of normalized coprime factors of the shaped plant. This method does not require an iterative procedure for robust stability margin and thus improves the computational efficiency. The real μ-analysis is adopted to ensure the robust stability of the system. The effectiveness of the method has been demonstrated through the simulation studies of a two-area interconnected power system.
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