ROBUST STABILIZER OF ELECTRIC POWER GENERATOR USING H^∞ WITH POLE PLACEMENT CONSTRAINTS

Mohamed Bouhamida - Mouloud A. Denai

   This paper deals with the application of robust control theory to the design of electric power system stabilisers. The well-known H^∞ technique is combined with pole placement constraints and solved with Linear Matrix Inequalities approach. This convex optimisation problem guarantees robust pole placement and leads to improved closed-loop system robustness and transient response characteristics. Uncertainties are taken into account in a robust fixed parameter and structure control law to allow for parameter variations and perturbations acting on the electrical power system. The proposed controllers are compared with μ-synthesis under a variety of operating conditions of the electrical power network.

Keywords: robust control, H^∞, pole placement, LMI, μ-analysis and synthesis, power system stabiliser

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