Wind power can bring new challenges when it is connected to the power grid. Generated power from wind energy system is always fluctuating due to the fluctuations in the wind. This paper shows a study on Power Quality (PQ) analysis of wind turbines installed in Hatay region and has been working for three years. Power quality parameters such as voltage, current, active, reactive and apparent power and harmonics are measured, analyzed and evaluated taking into consideration IEEE 519-1992 standards. These parameters are continuously measured for three months. The recorded parameters are voltage and current rms values of all single phase for every 10 power frequency cycles, average values of current and voltage harmonics every 3 sec, active, reactive, and apparent power values and the power factor every second. (C) 2015 The Authors. Published by Elsevier Ltd.