This article deals with the analysis, modeling, and control of the doubly-fed induction generator (DFIG) for wind turbines. The DFIG wind turbine can deliver more energy to the grid. There are some different methods to modify the DFIG system in order to accomplish the stator reactive power proposed. One of these methods is to modify the DFIG system for nominal voltage to evaluate cost and materials-efficiency consequences. A specific control strategy is implemented according to the vector control strategy. The proportional-integral (PI) regulators used are simple and precise controllers. This type of regulation, which is closed-loop rotor currents, allows adjustment of the sliding of the DFIG. This gives a good adjustment of the powers of the stator and the rotor. The percentage error of the simulation is less than 2 %. The results obtained in these investigations show that it is possible to adjust the powers of the stator, even with a variation of the parameters. The developed method will allow achieving the maximum efficiency of the wind energy conversion chain. The objective of this article is to optimize the quality of energy generated by wind turbines by controlling the reactive stator power and reducing the losses of the energy of the reactive stator power, which must be a physically minimal value. The results will be presented in the Matlab - Simulink environment.
This paper presents a global and optimal environment of the electro-mechanical conversion chain using the doubly-fed induction generator (DFIG) in wind turbines having an active power in the stator of the order of Megawatts (MW).
This paper will discuss the study, analysis and simulation of a photovoltaic (PV) electrical system performance adapted to a Maximum Power Point Tracking (MPPT) command for ensuring the pursuit of the maximum power supplied by the generator.To attain this purpose, the focus was on obtaining a system which presents a better adaptation between its various components: Photovoltaic generator (GPV) and load.The proposed approach is a (MPPT) command based on the algorithm perturb and observe, the role of which is to fix the optimal tension to the (GPV) output.The control carried out allows searching for the Maximum Power Point (MPP). The results obtained show that the controller used manages to force the system to operate at a maximum output power of (GPV) independently of the weather conditions and of the variation of the load.In this analysis, the conceived system is a (GPV) of the type producing, under standard test conditions (STC), a peak power of , an optimal current of 4.41A and an optimal tension of .
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