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A Multivariable Excitation Controller Design for a Multi-Machine Power System

The performance of a multivariable robust controller based on linear quadratic gaussian with loop transfer recovery (LQG/LTR) design methodology is investigated in a multi-machine power system (MMPS). This type of controller is known to provide good damping, noise and disturbance rejections. The model of the MMPS is based on generalized Heffron-Phillips linear model which has the feature of allowing for representation of frequency and voltage dependent IQMIS. Non-linear simulation was performed to show the effectiveness of the proposed controller.