Abstract:

Utilizing hourly wind speed observation data from eight national meteorological stations in the western region of Jilin province from 2012 to 2021, the wind shear power law formula was used to extrapolate specific wind speed thresholds corresponding to three conditions of non-operation, full capacity operation, and cut-out wind power generation at the observation heights of the weather stations. The statistical analysis was conducted of the annual total duration, continuous duration, and yearly variability of these specific wind speeds and their climatic characteristics, as well as assessing their impact on wind power generation. The results indicate that the western region of Jilin province possesses favorable wind energy resources, characterized by high annual average wind speeds, a high occurrence frequency of full capacity wind speeds, and a short duration of non-operation wind speeds, implying infrequent wind speed conditions unfavorable for wind power generation. The best wind resources in this region were observed from March to May, with higher monthly average wind speeds. Relatively favorable wind resources were concentrated in January, July, August, and December, with comparatively lower monthly average wind speeds and longer duration of non-operation wind speeds. The least specific wind speeds conducive for wind power generation occurred in February, May, and June. In the eastern parts of the western Jilin province, the wind resources were relatively unprominent, with lower annual average wind speeds compared to the western parts, longer periods of non-operation wind speeds, a lower frequency of full capacity wind speeds, and virtually no occurrences of cut-out wind speeds.

Key words: Zero-output wind speed, Rated wind speed, Cut-out wind speed, Wind energy resources