Hi. My name is costas. I start my master thesis and i face a problem. i take measurements in a hybrid renewable energy system (with photovoltaics and a wind turbine) to see the produce power quality of the system (i take measuremets after the inverter). From measurements i notice that i have big harmonig currents. I want to know if anybody have the IEEE standards for power quality (current, voltage) to compare them with the values of the measurements i take and also if there is a way to reduse this harmonics in the real system. Thanks.