Mohammed Kendzi

The main objective of this article is to adapt an independent power supply system to optimize the energy production of a wind turbine and thus eliminate power outages on the electrical grid when supplying power to the rotor of a doubly-fed induction generator (DFIG). This system uses a permanent magnet synchronous generator (PMSG) to supply power to the DFIG rotor and offers robust control, comparing PI and sliding mode control methods as a function of varying reference parameters. We begin by presenting the dynamic model of the wind turbine connected to the various generators, followed by the electrical model of the PMSG and DFIG with the control strategy. Next, we explain the theory and mathematical equation of the AC/DC rectifier and the DC/AC inverter. Then, we present the PI controller and the sliding mode control method. Finally, simulation results comparing the PI and sliding mode control methods illustrate and demonstrate the performance and feasibility of this system.

The purpose of this paper is the elimination of interruptions of electrical energy produced by a multi-source production system, so we have assured the feed of DFIG rotor in a wind system by different energy sources (photovoltaic generator, battery group) and switchover between them by auxiliary contacts controlled by a supervisor via a power control algorithm. For the photovoltaic generator, a controller for tracking the maximum power point is designed using direct search approach perturb observe method. For the battery group, the installation of a number of the capacitor battery elements in series and in parallel will be kept the power necessary to supply the DFIG rotor. For the wind system, it contains the power generated by DFIG is controlled by sliding mode system. With regard to switching between electrical energy sources, our proposed system relies on an algorithm to compare the energies produced by each generator with the energy required to feed the DFIG rotor and the energies consumed in the system, where the energy source with high production energy and available is exploited to feed the system and charge the batteries. Simulations were performed to confirm the reliability and efficacy of the system proposed.

In this paper, a hybrid power system is proposed to eliminate any interruption caused to absence of power supply network by the Fusion between the wind source and the photovoltaic source to create a hybrid system with internal power supply autonomy. The hybrid power system includes a solar and wind source whose wind energy conversion system is based on a doubly fed induction generator. The photovoltaic conversion system extracts the maximum power from the sun. A part of this power is used to supply the rotor of a doubly fed induction generator; the rest is injected in the grid. The connection between the two conversion systems is made by means of static converters (chopper/inverter). In the photovoltaic conversion chain, a controller for tracking the maximum power point is designed using the direct search approach the Perturb and observe method. The wind energy conversion system contains a doubly fed asynchronous generator with a control system of generated powers by the technique of the fuzzy logic. The simulation was done to prove the validity of the strategy and of the control method used for the control of the power generated by the hybrid system.