COUPLING ANALYSIS OF POWER OUTPUT CHARACTERISTICS AT SENDING AND RECEIVING ENDS OF CROSS-REGIONAL TRANSMISSION CONSIDERING WIND DROUGHT AND HYDROLOGICAL DROUGHT

Ma Ruijie; Zhou Yujie; Su Sheng; Liu Taowen; Yang Hongming; Wang Jin

doi:10.19912/j.0254-0096.tynxb.2024-2049

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (3) : 212-221. DOI: 10.19912/j.0254-0096.tynxb.2024-2049

COUPLING ANALYSIS OF POWER OUTPUT CHARACTERISTICS AT SENDING AND RECEIVING ENDS OF CROSS-REGIONAL TRANSMISSION CONSIDERING WIND DROUGHT AND HYDROLOGICAL DROUGHT

Ma Ruijie¹, Zhou Yujie², Su Sheng¹, Liu Taowen³, Yang Hongming¹, Wang Jin¹

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Abstract

The transmission of clean energy sources, such as wind power from the Northwest, across regions to southern provinces with primary energy shortages, is a crucial support for building a diversified clean energy supply system. The output of high-proportion hydropower in the southern receiving grids and wind power in the northern sending grids can be significantly affected by hydrological droughts and widespread low-output wind power events, respectively. This poses severe challenges to ensuring a stable power supply. Due to the lack of long-term operational experience with high-proportion clean energy transmission systems across large regions, a wind power shortage event assessment method based on meteorological data inversion is proposed. By combining ERA5 reanalysis meteorological data with wind turbine power output models, and constructing hourly time series of regional wind power capacity factors, the interannual and seasonal wind power shortage intensity and duration are analyzed. Using meteorological and hydrological data from Gansu and Hunan provinces, the monthly wind power shortage intensity and hydrological drought indices over several years are calculated. The coupling levels between hydropower and wind power are classified accordingly, and the seasonal characteristics and interannual variations of the output from both sending and receiving end power sources are analyzed, and the patterns of insufficient output from wind and hydropower at both ends are identified.

Key words

low wind power / hydrological drought / renewable power system / reanalyze data / coupling coordination analysis / standardized discharge index

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Ma Ruijie, Zhou Yujie, Su Sheng, Liu Taowen, Yang Hongming, Wang Jin. COUPLING ANALYSIS OF POWER OUTPUT CHARACTERISTICS AT SENDING AND RECEIVING ENDS OF CROSS-REGIONAL TRANSMISSION CONSIDERING WIND DROUGHT AND HYDROLOGICAL DROUGHT[J]. Acta Energiae Solaris Sinica. 2026, 47(3): 212-221 https://doi.org/10.19912/j.0254-0096.tynxb.2024-2049

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