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This article presents the decentralized sliding mode control design for two marine turbines connected to Grid. MPPT strategy control (Maximum Power Point Tracking) is used to maximize the energy production. Simulations in Matlab environment are made over one tide period of semidiurnal type and under some perturbations using data of Raz de Sein (Britany, France). In the first part of the simulation, the obtained results show that the energy production system can be directly connected to grid. In the second part of simulations, a comparative result using the proposed method and conventional AVR-PSS is discussed.

This paper presents the adaptive nonlinear controller for power system stabilization and voltage regulation that is capable of providing satisfactory voltage in the presence of unknown variations of the power system operating conditions. The design is based on a standard third-order model of synchronous generator which requires only information about the physical available measurements of relative angular speed, active and reactive powers and terminal voltage. The power angle, mechanical power and the total reactance, are not assumed to be available for feedback. The proposed adaptive controller is implementable in practice since only measurable outputs have been used. The robustness with respect to 3–phase short-circuit and mechanical power variation constitutes the main positive features of the proposed approach. The results of accurate numerical simulations are reported, comparing the performance of the proposed adaptive nonlinear control scheme to one of the AVR/PSS controller.

In this paper, an online rotor resistance estimator for induction motor adaptive control is presented. The proposed algorithm is an improvement of the previous work Kenne et al.. The rotor resistance scheme uses the rotor speed, the stator current, voltage provided by the controller, time-derivatives of the stator current and voltage. The time derivatives of the stator current and voltage are estimated by using 2 nd order sliding mode observer. The convergence of the estimated rotor resistance to the nominal value in finite time is achieved when the classical persistent excitation condition is satisfied by the input signal. Experimental results with 100% variation of the stator resistance and online variation of the rotor resistance show that the proposed algorithm gives better performance compared to the previous work.