2022年长江上游流域严重干旱对三峡水电站水力发电的影响分析OA北大核心CSTPCD

High temporal resolution hydrologic data of the Three Gorges Hydropower Station were used to calculate high temporal resolution data of hydroelectricity production.Accordingly,the impact of severe drought in the Upper Yangtze River basin on hydroelectricity production of the Three Gorges Hydropower Station in 2022 was quantified.And,the mechanism of the impact of meteorological drought on hydropower power was analyzed by combining the precipitation data of meteorological stations in the confluence area.The results showed that the reduction of hydroelectricity production of the Three Gorges Hydropower Station in 2022 was mainly concentrated in July-November,which the total hydroelectricity production decreased by 24.110 billion kW∙h(44.75%)compared with the normal condition.Among them,the decrease in hydroelectricity production was the largest in September,with hydroelectricity production decreased by 6.843 billion kW∙h(61.05%)compared with normal condition.In 2022,the meteorological drought in July and August in the confluence area of the Three Gorges Hydropower Station quickly caused the hydrological drought.Meanwhile,the adjustment capacity of the Three Gorges Hydropower Station was weak from June to November,and the impact of hydrological drought on hydroelectricity production was strong.The meteorological drought that occurred in the confluence area of the Three Gorges Hydropower Station in July-August and the requirement for flood control storage capacity both had a strong impact on hydroelectricity production,and its function of"saving abundant and replenishment dry"had also been obviously adversely affected.