On the basis of analyzing the conventional methods for wind turbine output performance evaluation

several problems occurred during the evaluation were discussed.Then

a method evaluating the performance of wind turbine was presented

which acquires relevant production data of wind farm through real-time/historical database and then converts the data into standard conditions values.By online calculation

the characteristic curves of the turbine electrical output power and wind speed will be drew automatically.Combing with the rated design calibration values

the deviation of discrete degree of the actual operation data was compared

thus the staff can supervise and evaluate the operation performance of the units in a certain period and the current period.