Results 31 to 40 of about 5,560 (220)
Optimal Daily Operation of Cascade Hydropower Stations
Journal of Water Resources Research, 2014 采用以水定电和以电定水两种运行方式，分别以发电量最大和总耗水量最小为目标函数，建立了梯级水电站群日优化调度模型，并采用动态规划方法进行求解。使用梯级水电站群日发电资料和径流资料(2013年7月~12月)的应用检验结果表明，优化调度较实际调度提高发电量约0.67亿kW·h(增加11.54%)和减少耗水量0.26亿m3(减少−0.89%)，发电保证率由92%提高到100%，显著提高了水电站群的发电效益。Daily operation models for cascade hydropower stations were proposed and developed in this paper.
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Characterisation of Drought and Wet Events in the Paraíba do Sul River Basin—Brazil
International Journal of Climatology, EarlyView.Trend analysis identified statistically significant reductions in precipitation (at the 5% significance level) at specific pluviometric stations in São Paulo and Rio de Janeiro, while other areas, mainly in Minas Gerais, experienced significant increases in annual and seasonal rainfall, particularly during summer and spring. These significant trends at
Gildo Rafael de Almeida Santana +4 more
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AIP AdvancesIn wind power prediction, the input probability distributions in the different sub-periods are shifted owing to the strong randomness of the input features, such as wind speed and direction.
Dan Li +5 more
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River, EarlyView.Abstract Optimizing reservoir refill operation rules is crucial for enhancing reservoir sustainability and resilience. This study proposes a refill operation model designed to derive optimal refill guide curves by considering flood risk prevention, maximum storage levels, and the combined benefits of hydropower generation and energy storage.
Lihua Chen +4 more
wiley +1 more source
IEEE Access, 2021 In order to meet the challenges brought by the high penetration of intermittent and fluctuating wind and solar power, a short-term optimal scheduling model for wind-solar-hydro hybrid generation system with cascade hydropower is established with the ...
Jun Xie +5 more
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Practical Day‐Ahead Gas Generator Dispatch Optimisation for Enhancing the Reserved Capacity
IET Smart Energy Systems, EarlyView.Practical day‐ahead gas generator dispatch optimisation model is proposed to enhance the system reserved capacity. ABSTRACT In order to reduce carbon dioxide emissions, traditional coal‐fired power generation has been strictly limited in China recently, which has led to the problem of reserved capacity shortage. As one of the critical east provinces of
Shengyuan Liu +6 more
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Use of hydraulic rating to set environmental flows in the Zhangxi River, China [PDF]
, 2010 Ningbo city, China, is a rapidly growing residential and industrial centre, with a current population of 4 million. Its development has required a major water supply expansion programme providing 400,000 m3 of water per day from the upper reaches of the ...
Acreman, M.C. +6 more
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Sex‐Specific Atlantic Salmon Upstream Passage and Fallback at a Natural Cascade After Dam Removal
Fisheries Management and Ecology, EarlyView.ABSTRACT In the Boquet River (NY, USA) a low‐head dam set above a ~200‐m bedrock cascade was removed in 2015. We used radio‐telemetry to assess landlocked Atlantic salmon passage at the remaining cascade (2020, 2022). Across years, 52% of males (13/25) attempted cascade passage whereas females made no discernable attempts (0/11).
Kurt C. Heim +5 more
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MATEC Web of Conferences, 2018 With the succession of river basins and inter-basin hydropower stations, the joint optimal operation of cascade hydropower stations in the river basin has large-scale, nonlinear, strong coupling, and multi-target characteristics, and must consider the ...
Li Mo +3 more
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Water models and scenarios inventory for the Danube region [PDF]
, 2015 This technical report presents an inventory of existing models currently used in the Danube Region by local, regional, national authorities and scientific institutes for the development of a hydro-economic multi-model ensemble for the Danube with a ...
FEHER Janos, MUERTH Markus
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