Measurement systems dedicated to wind turbine power quality applications

The influence of wind turbines on the power quality and their interaction with the grid has led to the development of measurement systems and evaluation procedures dedicated to such applications. Two different measurement systems have been developed at CRES for measuring and analysing the quality of the power produced from grid connected wind turbines. Both systems have been designed in order to meet the MEASNET requirements. These measurement requirements have been proposed in the framework of the EU project “European Wind Turbine Standards II” and comply with the prerequisites of the relevant power quality IEC standards, modified to address the special aspects of wind turbine applications. In the present paper, the wind turbine power quality evaluation procedure, the measurement equipment and the different measurement procedures used are described. The assessment of the performance of the systems is accomplished through measurements on a 110 kW wind turbine, operating at CRES´ Test Station. The results are presented and compared