Abstract: The traditional selection method is still used for the economic cross-section of wind farm conductors, and the different wind speeds in four seasons and morning and evening and the distinctive characteristics of wind farms with more power generation in winter, less power generation in summer, more power generation at night and less power generation during the day are not considered. In view of this, a method for calculating the maximum load loss hours of wind farms is proposed. Firstly, according to the method of minimizing the annual cost of the whole life cycle, the operation loss cost is comprehensively considered, and the influence of the maximum load loss hours of the wind farm on the economic cross-section of the wind farm conductor is emphatically studied. Then, the correspondence between the maximum load loss hours and the maximum load utilization hours is re-established through the actual power data of the wind farm. Then, with the help of the average ratio and the peak-to-valley difference ratio to describe the correlation between wind farms, the quantitative expression of the maximum load loss hours is given, and the economic cross-section of the conductor is calculated by using the minimum annual cost method of the whole life cycle. Combined with real-time data verification, the proposed method can guide the unbuilt wind farm to select the economic cross-section of the conductor.

Key words: wind farm, economic cross-section of the conductor, wind power generation characteristics, maximum load loss hours, maximum load utilization hours