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Hydro-wind Optimal Operation for Joint Bidding in Day-ahead Market: Storage Efficiency and Impact of Wind Forecasting Uncertainty

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Journal of Modern Power Systems and Clean Energy 2020年第1期8卷 142-149页

作者： António cerejo Sílvio J.P.S.Mariano Pedro M.S.Carvalho Maria R.A.Calado Technical-Scientific Unity of Electrical and Industrial Engineering Polytechnic Institute of Castelo BrancoAvenida do Empresário6000-767 Castelo BrancoPortugal Department of Electromechanical Engineering University of Beira Interior and Instituto de TelecomunicacoesCalcada Fonte do Lameiro6201-001 CovilhaPortugal Department of Electrical and Computer Engineering Instituto Superior Técnicoand INESC-IDUniversity of LisbonAv.Rovisco Pais1049-001 LisbonPortuga

Wind power production is *** imbalance between committed and delivered energy in pool markets leads to the increase of system costs,which must be incurred by defaulting producers,thereby decreasing their *** avoid this situation,wind producers can submit their bids together with hydro *** the mismatches between the predicted and supplied wind power can be used by hydro producers,turbining or pumping such differences when *** study formulates the problem of hydro-wind production optimization in operation contexts of pool *** problem is solved for a simple three-reservoir cascade case to discuss optimization *** results show a depreciation in optimal revenues from hydro power when wind forecasting is *** depreciation is caused by an asymmetry in optimal revenues from positive and negative wind power *** problem of neutralizing the effect of forecasting uncertainty is subsequently formulated and solved for the three-reservoir *** results are discussed to conclude the impacts of uncertainty on joint bidding in pool market contexts.

关键词： Optimization hydro power wind power uncertainty joint bidding pool market

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术中脑组织氧分压偏低与动脉瘤性蛛网膜下腔出血术后血管痉挛相关(英文)

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中华神经外科疾病研究杂志 2012年第5期11卷 417-417页

作者： cerejo a Silva PA Vilarinho A Dias C Vaz R Faculty of Medicine Hospital S.JoaoPortoPortugal

Background Vasospasm is a frequent complication of subarachnoid hemorrhage ( SAH) ,implicated in poor outcome,and prediction of its occurrence might be important on the therapeutic approach of this condition. Brain oxygenation in aneurysmal SAH was prospectively monitored during surgery in 28 patients,using brain tissue oxygen pressure ( PbtO 2 ) ,studying its association with the occurrence of post-operative vasospasm,detected by transcranial Doppler. Methods PbtO 2 monitoring was performed during surgery of 28 patients with aneurysmal SAH,using a polarographic microcatheter ( Licox; GMS,Kiel,Germany) ,inserted into the cerebral tissue. The aneurysms were localized in the anterior communicating artery ( AcoA) complex ( eight cases) ,in the posterior communicating artery ( Pcom) origin ( seven cases) ,and in the middle cerebral artery ( MCA) bifurcation ( 13 cases) . Basal PbtO 2 values,obtained immediately before application of temporary or definitive clips,were studied according to age,clinical status and CT findings. The association between the basal values and the occurrence of increased blood flow velocity in the post-operative transcranial Doppler ( TCD vasospasm) was investigated. Results Post-operative TCD vasospasm developed in 13 patients,all of them with basal values inferior to 10 mmHg. PbtO 2 basal value was significantly lower in cases that developed TCD vasospasm. This association was independent of age, clinical status,or CT findings. Conclusion The finding of low intraoperative basal PbtO 2 values may be an indicator for a high risk of occurrence of post-operative TCD vasospasm in cases of aneurysmatic SAH.

关键词：神经外科学疾病临床研究医学研究

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