Performance check of wind turbines

Site: medium size wind farm in Belgium

Procedure:

• combination of analyses of SCADA data and a nearby wind measurement
• comparison to reanalyses data, met station data and aj production indices

Results:

• inconsistencies related to the power curve could be detected in the past, including longer periods with reduced availabilities and a variety of curtailments
• more recently, the operational behaviour of the turbines has improved; however, some inconsistencies still occur around rated wind speed which need to be analysed further with respect to an additional load on the turbines
• realistic performance of the wind turbines in the wake of neighbouring turbines, i.e. no under-performance with respect to the power curve