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This paper presents a nonlinear-controller design approach for ultracapacitor-based energy storage systems (UCESSs) for supplying active and reactive power in grid-connected power system applications. The controller is designed based on the dynamical model of UCESSs where the model is developed from the electrical equivalent circuit of the ultracapacitor (UC) connected to the grid through a voltage...
This paper presents a robust excitation controller design for power systems to improve the dynamic stability following large disturbances. The controller is designed based on the partial feedback linearization where some parts of power systems need to be linearized. The robustness of the proposed control scheme is ensured by considering uncertainties within power systems model. In this paper, the...
This paper presents a novel excitation control design to improve the voltage profile of power distribution networks with distributed generation and induction motor loads. The system is linearised by perturbation technique. Controller is designed using the linear-quadratic-Gaussian (LQG) controller synthesis method. The LQG controller is addressed with norm-bounded uncertainty. The approach considered...
This paper deals with the design of a nonlinear controller for single-phase grid-connected photovoltaic (PV) systems to maintain the current injected into the grid in phase with grid voltage and to regulate the DC link voltage for achieving maximum power point tracking (MPPT). The controller is designed based on the partial feedback linearization which transforms the nonlinear system into a reduced...
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