Active power filter based on wind turbine for electric power system quality improvement

The increasing number of grid-connected non-linear loads causes more disruption problems to power grids. Indeed, these loads absorb periodic currents with different waveforms and consume reactive power which causes the emergence of harmonic distortion in the mains current and voltage levels that should be avoided. In order to solve this drawback, this paper presents a control scheme based on shunt active filter supplied by a wind turbine generator to compensate at the same time the harmonics currents and the reactive power caused by nonlinear loads. The aim of this compensation is to provide a high voltage quality at the point of common coupling (PCC) through a proper control of wind turbine distributed generators interface converters. The system is simulated using MATLAB software and results are provided in order to show the performance of this compensation technique in terms of harmonic distortion reduction and power-factor improvement.