This part of IEC 61400 includes: 9• definition and specification of the quantities to be determined for characterizing the power quality of a grid connected wind turbine; • measurement procedures for quantifying the characteristics; • procedures for assessing compliance with power quality requirements, including estimation of the power quality expected from the wind turbine type when deployed at a specific site, possibly in groups. The measurement procedures are valid for single wind turbines with a three-phase grid connection. The measurement procedures are valid for any size of wind turbine, though this standard only requires wind turbine types intended f