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Full certification of EWT DW61 wind turbine at Ecofys WTTS Test Site Lelystad

EWT has successfully obtained the IEC-64100 wind turbine class certification for its wind energy generator DW61, with 61 m rotor diameter and 900kW rated power.

In 2015, EWT constructed a prototype of its DW61 wind turbine type with a hub height of 69 m at Test Site Lelystad. The wind turbine testing ground is owned and run by Ecofys WTTS, a subsidiary of Ecofys, A Navigant Company. Supporting EWT at the time, Ecofys WTTS conducted the world’s first IEC-compliant site calibration based completely on LiDAR measurements, and build a tubular met mast of 69 m of height to acquire wind measurements according to the IEC specifications.

The wind turbine performance was tested in collaboration with windtest grevenbroich, which comprised power curve measurements, load measurements and power quality. The results of the performance test were certified by DEWI-OCC in 2016, with the wind turbine obtaining the IEC class IIIA. EWT has since moved on to test the DW61 in other power modes.

With this successful certification, Ecofys WTTS supports the turbine manufacturer EWT and takes a big step forward in the use of LiDAR as primary source for site calibration measurements.