Harmonic Distortions on Grid Connected Double Fed Generator: A Review

There are a number of distortions that affect the correct operation of a wind energy conversion system, among them one of the most significant is the presence of harmonics, which can lead to power or torque pulsations, overheating and increased losses in the stator windings, low power factor, etc. According to the literature, the harmonic sources in a wind energy conversion system can be classified from the grid and harmonics produced in the wind energy conversion system. This paper presents a review about the solutions for harmonic distortions on grid connected double fed generator based in a back to back converter. The techniques employed to reduce the harmonic contamination to the grid in both scenarios are reviewed.