Abstract: Wind turbine generating capacity indicator is one of the important indicators reflecting the post-evaluation process of wind farm operator. Wind energy randomly changed, which principally influences the power generation in wind farm. The situation of wind could not be given an exact prediction. Therefore, it is really difficult to evaluate the generation quantity depending on wind. In this article, confronting this problem, the solution could be demonstrated that the actual generation quantity of operating wind farm would be calibrated with the representative year, and theoretical generation could be evaluated.By contrasting wind farm operation with result of feasible research, and adjusting accurately the electricity generation on operation period with representative year. It can be analyzed and summarized the practical effects on generation by some factors, according to the present situation of wind farm, it can be offered some advisements to resist these adverse influences, after the adjustment generating capacity more tally with the actual situation, as references for next feasibility research designing.

Key words: wind farm, power generation, post evaluation