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Impact of the Intermittency of Photovoltaic Power Plants on the Frequency Management: Case of the Senegalese Electricity Grid

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Journal of Power and Energy Engineering 2020年第7期8卷 55-70页

作者： Mahamat Adoum Abdoulaye gabriel jean philippe tevi Djicknoum Diouf Amadou Seidou Maiga LEITER Laboratoire Electronique Informatique Télécommunication et Energies Renouvelables Université Gaston Berger Saint-Louis Sénégal

This paper investigates the impact of the intermittency of the photovoltaic (PV) power plants on the electric grid frequency management and the consequences that can occur. To meet these purposes, three years data of the Senegalese grid frequency are used, combined with three PV power plants data since their starting-up. Using these data, we analyzed two days of heavily disturbed operation of the Senegalese grid in order to emphasize the real impact of the presence of PV power plants on the electrical grid. Our study has highlighted that how the intermittency of photovoltaic power plants affects frequency management. It obviously appears that the PV production curves follow the irradiation variations. Instantaneous variations of PV production make it difficult to manage the grid frequency leading to more frequent load shedding as we have shown with the data after the commissioning of the PV power plants. We also estimate the power then energy losses during the load shedding induced by the PV integration on the power grid by comparing a period corresponding to one month before (February 2017) and one month after (February 2018) the integration of variable PV production.

关键词： Intermittency Frequency Fluctuation Energy Loss Power Loss Fluctuating Power

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Tunnel junctions in a III-V nanowire by surface engineering

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Nano Research 2015年第3期8卷 980-989页

作者： Salman Nadar Chloe Rolland jean-Frangois Lampin Xavier Wallart philippe Caroff Renaud Leturcq Institute of Electronics Microelectronics and Nanotechnology CNRS-UMR 8520 ISEN Department Avenue Poincare CS 60069 59652 Villeneuve d'Ascq Cedex France Department of Electronic Materials Engineering Research School of Physics and Engineering The Australian National University Canberra ACT0200 Australia Departement Science et Analyse des Mat~riaux Centre de Recherche Public-Gabriel Lippmann 41 rue du Brill L-4422 Belvaux Luxembourg

We demonstrate a simple way of fabricating high performance tunnel devices from p-doped InAs nanowires by tailoring the n-doped surface accumulation layer inherent to InAs surfaces. By using appropriate ammonium sulfide based surface passivation before metallization without any further thermal treatment, we demonstrate characteristics of tunnel p-n junctions, namely Esaki and backward diodes, with figures of merit better than previously published for InAs homojunctions. The further optimization of both the surface doping, in a quantitative way, and the device geometry allows us to demonstrate that these nanowire-based technologically-simple diodes have promising direct current characteristics for integrated high frequency detection or generation.

关键词：表面工程纳米线隧道结 InAs 隧道设备表面钝化表面掺杂几何形状

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郑州建业艾美酒店

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城市环境设计 2015年第Z1期 222-231页

作者：郭锡恩胡如珊 Alex Mok 谢宜加马丽媛闵捷 Peter Eland 陆颖芝 Victor Ung Eva Wieland 王琢 Andrew Roman 张致云倪端龚梦胡正芳 Begonia Sebastian 穆忆恩 Erika Lanselle Debby Haepers 蔡春燕 Dagmar Niecke 杨延蕙 Briar Hickling Dirk Weihlen 王翔 Jadesupa Pittasporn 王宇扬邱琪 Joseph Lee Singeyong Pham Shelley gabriel Arnau Baril Talitha Liu 郭锡真任四维赵颖丝彭立恬周浩鲁永新赵云 jean-philippe Bonzon(产品设计师) 陈晓雯 Nicholas Faradet 李希米 Pedro Pegenaute 如恩设计研究室

档案——游走一个城市的脉络河南,曾是中国古老的政治经济及文化中心,也是帝王定都之地,如今吸引着世界各地的旅人。本案旨在将位于河南省省会城市郑州的建业艾美酒店,打造为郑州的全新地标。为了通过艺术(文学、自然、饮食、戏剧以及图... 详细信息

档案——游走一个城市的脉络河南,曾是中国古老的政治经济及文化中心,也是帝王定都之地,如今吸引着世界各地的旅人。本案旨在将位于河南省省会城市郑州的建业艾美酒店,打造为郑州的全新地标。为了通过艺术(文学、自然、饮食、戏剧以及图案)展现河南的历史,建筑师的设计理念就是将新旧手工艺品'归档',形成为当地居民与旅客的观光热点。档案理念在建筑立面上表现为系

关键词：平面设计师建筑立面酒店建业郑州河南档案理念建筑师美术家客房大堂后台区高级项目经理中庭盒子

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Renal impairment and heart failure with preserved ejection fraction early post-myocardial infarction

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World Journal of Cardiology 2010年第1期2卷 13-18页

作者： Vinod Jorapur Gervasio A Lamas Zygmunt P Sadowski Harmony R Reynolds Antonio C Carvalho Christopher E Buller James M Rankin jean Renkin philippe gabriel Steg Harvey D White Carlos Vozzi Eduardo Balcells Michael Ragosta C Edwin Martin Vankeepuram S Srinivas William W Wharton III Staci Abramsky Ana C Mon Shari S Kronsberg Judith S Hochman Columbia University Division of Cardiology Mount Sinai Medical Center II Ischemic Heart Disease Department National Institute of Cardiology Leon Charney Division of Cardiology New York University School of Medicine Cardiology Division-Hospital Sao Paulo Federal University of Sao Paulo Division of Cardiology University of British Columbia Department of Cardiovascular Medicine Royal Perth Hospital Department of Cardiology UCL St Luc University Hospital INSERM U-698 Department of CardiologyHopital Bichat Cardiology Department Green Lane Cardiovascular ServiceAuckland City Hospital Interventional Cardiology Instituto de Intervenciones Cardiovasculares S.A. Cardiovascular Associates Wellmont Holston Valley Medical Center Cardiovascular Division University of Virginia Department of Medicine-Division of Cardiology York Hospital Division of Cardiology Montefiore Medical Center/Albert Einstein College of Medicine Research Department Asheville Cardiology AssociatesP.A. Maryland Medical Research Institute

AIM:To study if impaired renal function is associated with increased risk of peri-infarct heart failure (HF) in patients with preserved ejection fraction (EF).METHODS:Patients with occluded infarct-related arteries (IRAs) between 1 to 28 d after myocardial infarction (MI) were grouped into chronic kidney disease (CKD) stages based on estimated glomerular filtration rate (eGFR).Rates of early post-MI HF were compared among eGFR *** regression was used to explore independent predictors of ***:Reduced eGFR was present in 71.1% of 2160 patients,with significant renal impairment (eGFR < 60 mL/min every 1.73 m2) in 14.8%.The prevalence of HF was higher with worsening renal function:15.5%,17.8% and 29.4% in patients with CKD stages 1,2 and 3 or 4,respectively (P < 0.0001),despite a small absolute difference in mean EF across eGFR groups:48.2 ± 10.0,47.9 ± 11.3 and 46.2 ± 12.1,respectively (P=0.02).The prevalence of HF was again higher with worsening renal function among patients with preserved EF:10.1%,13.6% and 23.6% (P < 0.0001),but this relationship was not significant among patients with depressed EF:27.1%,26.2% and 37.9% (P= 0.071).Moreover,eGFR was an independent correlate of HF in patients with preserved EF (P=0.003) but not in patients with depressed EF (P=0.181).CONCLUSION:A significant proportion of post-MI patients with occluded IRAs have impaired renal *** renal function was associated with an increased rate of early post-MI HF,the association being strongest in patients with preserved *** findings have implications for management of peri-infarct HF.

关键词： Heart failure Myocardial infarction Kidney disease

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