Power Quality Improvement of a Wind Turbine System in Mauritania Using a Fuzzy Logic Controlled Dynamic Voltage Restorer

The problems of power fluctuations, induced by the integration of wind turbines into a power grid, during changes in wind speed are manifested usually by variations in the voltage, current or frequency. Besides affecting the quality of energy, these problems can lead to the dysfunction of sensitive equipment. To solve these disturbances caused by the wind turbines, effective protection of the sensitive loads connected to the grid is required. The purpose of this paper is to improve the quality of the energy produced by a wind power plant. This new approach is then validated in the context of Mauritania. For that, a Dynamic Voltage Restorer (DVR) is proposed to compensate for the voltage drops and harmonic distortions of the voltage supplied by the wind turbine when the wind speed changes. In order to boost the performance of the proposed system without using its model, a fuzzy controller is adopted. In addition, to verify the efficiency of the proposed control, a simulation model using MATLAB/Simulink is developed and the behavior analysis of the restorer under different operating conditions is carried out. The obtained results show that the reactive power is reduced by 15% and the harmonic distortion rate of the voltage is limited to 1%. This is fully compatible with the IEEE-519 standard.