检索结果-南通市图书馆

Guest Editorial:Special Section on Control Centers for the Evolving Power Grid:Architecture and Applications

Journal of Modern Power Systems and Clean Energy 2022年第2期10卷 I0001-I0002页

作者： anjan bose Patrick Panciatici Xin Shan Washington State University PullmanUSA RTE ParisFrance NARI Group Corporation(State Grid Electric Power Research Institute) NanjingChina

THE world-wide drive to decrease greenhouse gases in the atmosphere is rapidly changing the mix of fuel resources that are used to generate *** percentage of fossil fuels,especially coal,is declining while the percentage of renewable resources,like wind and solar,is *** generation mix has always depended on the avail-ability of different fuels in different regions,like the availability of hydro or the acceptability of nuclear power,and the recent changes also depend on this geography,like the radiance of the sun or the intensity of the *** these changes will lead to different architectures in the evolving power grid,some trends are already being felt.

关键词： Power gases fuels

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Control and Stability of Large-scale Power System with Highly Distributed Renewable Energy Generation:Viewpoints from Six Aspects

引用

CSEE Journal of Power and Energy Systems 2023年第1期9卷 8-14页

作者： Qing-Hua Wu anjan bose Chanan Singh Joe H.Chow Gang Mu Yuanzhang Sun Zhaoxi Liu Zhigang Li Yang Liu School of Electric Power Engineering South China University of TechnologyGuangzhou 510640China School of Electrical Engineering&Computer Science Washington State UniversityPullmanWA 99164USA Department of Electrical and Computer Engineering Texas A&M UniversityCollege StationTX 77843USA Department of Electrical Computer and Systems EngineeringRensselaer Polytechnic Institute(RPI)TroyNYUSA Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology Ministry of Education(Northeast Electric Power University)Jilin 132012China School of Electrical Engineering and Automation Wuhan UniversityWuhan 430072China

Power systems are moving toward a low-carbon or carbon-neutral future where high penetration of renewables is *** conventional fossil-fueled synchronous generators in the transmission network being replaced by renewable energy generation which is highly distributed across the entire grid,new challenges are emerging to the control and stability of large-scale power *** analysis and control methods are needed for power systems to cope with the ongoing *** the CSEE JPES forum,six leading experts were invited to deliver keynote speeches,and the participating researchers and professionals had extensive exchanges and discussions on the control and stability of power ***,potential changes and challenges of power systems with high penetration of renewable energy generation were introduced and explained,and advanced control methods were proposed and analyzed for the transient stability enhancement of power grids.

关键词： Distributed energy resources high converter penetration power system control renewable energy generation stability control transient stability

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

基于综合几何指标的广域电力系统稳定器设计

引用

电力系统自动化 2013年第2期37卷 18-22页

作者：陈刚程林孙元章 anjan bose 清华大学电机工程与应用电子技术系北京市100084 电力系统及发电设备控制和仿真国家重点实验室清华大学北京市100084 School of Electrical Engineering and Computer Science Washington State University美国 Pullman WA 99164

选择适当的控制器落点和反馈信号是广域电力系统稳定器(WPSS)设计的一个关键步骤。而作为应用最为广泛的留数法,在面对多种不同类型备选信号时会因为不同类型信号幅值比例问题而失效。文中采用基于系统可观性和可控性的综合几何指标来... 详细信息

选择适当的控制器落点和反馈信号是广域电力系统稳定器(WPSS)设计的一个关键步骤。而作为应用最为广泛的留数法,在面对多种不同类型备选信号时会因为不同类型信号幅值比例问题而失效。文中采用基于系统可观性和可控性的综合几何指标来选择控制器的落点和反馈信号,能够有效克服留数法的缺陷。重点讨论了在考虑实际电网量测和通信要求条件下的广域反馈信号选择问题,把反馈输入备选信号范围扩大到线路功率、母线频率偏差、区域惯性中心角差、机端功率及发电机角频率等。研究表明,联络线有功功率最适合作为WPSS的反馈输入信号。最后,结合设计控制器参数的留数相位补偿法完成WPSS的设计。2区4机系统算例详细说明了WPSS的设计过程,表明所提出的方法能够从不同类型的反馈信号中选择最优的信号。数值仿真结果表明,按照该方法设计的WPSS能够有效提高电网稳定性,抑制区间模式低频振荡。

关键词：低频振荡广域测量系统阻尼控制几何指标电力系统稳定器

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

WPSS输入反馈时延的自适应分段补偿设计

引用

电力系统自动化 2013年第14期37卷 25-31页

作者：陈刚程林张放孙元章 anjan bose 电力系统及发电设备控制和仿真国家重点实验室清华大学北京市100084 四川电力科学研究院四川省成都市610072 School of Electrical Engineering and Computer Science Washington State UniversityPullmanWA 99164美国

广域电力系统稳定器(WPSS)是抑制电力系统区间模式振荡最有效的方法之一。WPSS以相量测量单元(PMU)量测的远方同步信号为反馈输入,在将其应用到工程实际时需要着重考虑远方信号的时延问题。从长期来看,时延通常会在一定范围内呈现一定... 详细信息

广域电力系统稳定器(WPSS)是抑制电力系统区间模式振荡最有效的方法之一。WPSS以相量测量单元(PMU)量测的远方同步信号为反馈输入,在将其应用到工程实际时需要着重考虑远方信号的时延问题。从长期来看,时延通常会在一定范围内呈现一定的随机分布特性。文中设计了一种自适应分段时延补偿器,将时延分为若干个区间,对每一个区间设计时延补偿。时延补偿器根据在线量测得到的实际时延自适应地调整控制器的时延补偿区间,以达到最优补偿的目的。文中重点讨论了时延分段的方法以及时延补偿器自适应调整的规则。将提出的自适应分段时延补偿器在两区四机系统中实现,不同工况下的数值仿真结果表明了补偿器的有效性和鲁棒性。RTDS实验结果进一步表明所提方法可行且有效。该方法考虑了长时期内时延的变化,符合工程实际情况,适合于现场工程应用。

关键词：低频振荡广域量测系统阻尼控制时延补偿自适应控制

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Role of CYP2E1 gene polymorphisms association with hepatitis risk in Northeast India

引用

World Journal of Gastroenterology 2010年第38期16卷 4800-4808页

作者： Manab Deka Moumita bose Bharati Baruah Purabi Deka bose Subhash Medhi Sujoy bose anjan Saikia Premashish Kar Subhash Medhi Sujoy bose Department of Biotechnology Gauhati University Department of Medicine Maulana Azad Medical College Medical and Gastroenterology Unit Central Hospital N.F.Railway MaligaonGuwahati-781011India

AIM:To investigate hepatitis virus, genetic and environmental factors, and their interactions in predisposing patients to liver diseases in Northeast India. METHODS:A total of 104 jaundice patients and 124 community controls were included. Serological analysis was performed by routine enzyme-linked immunosorbent assay, and nucleic acid testing for hepatitis viruses was done by polymerase chain reaction (PCR), followed by PCR direct sequencing for viral genotyping. Cytochrome P450 2E1 (CYP2E1) polymorphism was studied by PCR-restriction fragment length polymorphism. Nitrite and volatile nitrosamines in indigenous foods consumed routinely by the Northeast Indian ethnic population were estimated by Griess’s reagent and GC-MS, ***: Hepatitis A virus (HAV) infection was predominantly prevalent (36.5%) in our cohort, followed by hepatitis B virus (HBV), hepatitis E virus (HEV) andhepatitis C virus. HBV genotype D and HEV genotype 1 were the most dominant. CYP2E1 c1/c2 genotype frequency was comparatively higher in alcoholic (P<0.0001,OR =30.5) and cryptogenic (P=0.014, OR=8.714) patients, and was associated with significantly higher hepatitis risk (P=0.0.007,OR=6.489). Mutant C allele of Cyp2E1 DraⅠ frequency was comparatively higher in HAV (P=0.006), alcoholic (P =0.003) and cryptogenic (P=0.014) cases, and was associated with overall hepatitis risk (P=0.026, OR=5.083). Indigenous foods, Gundruk, Kharoli, betel leaf and nuts were found to have the highest nitrite content. CONCLUSION: Apart from viral factors, CYP2E1 polymorphism might be associated with increased risk of liver diseases in Northeast India. Indigenous foods that contain nitrite and nitrosamine might be an associated risk factor.

关键词： Viral hepatitis Cytochrome P450 2E1 Gene polymorphism Nitrites Nitrosamines

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Field-dependent spin waves in high-aspect-ratio singlecrystal ferromagnetic nanowires

引用

Nano Research 2016年第5期9卷 1426-1433页

作者： Semanti Pal Susmita Saha M. Venkata Kamalakar anjan Barman Department of Condensed Matter Physics and Material Sciences S. N. Bose National Centre for Basic Sciences Block JD Sector Ⅲ Salt Lake Kolkata 700 098 India Department of Physics and Astronomy Uppsala University Box 516 75120 Uppsala Sweden

We investigate the spin wave （SW） modes in high-aspect-ratio single-crystal ferromagnetic nanowires （FMNWs） using an all-optical time-resolved magnetooptical Kerr effect （TR-MOKE） microscope. The precessional magnetization dynamics in such FMNWs unveil the presence of uniform and quantized SW modes that can be tuned by varying the bias magnetic field （H）. The frequencies of the modes are observed to decrease systematically with a decreasing magnetic field, and the number of modes in the spectrum is reduced from four to three for H 〈 0.7 kOe. To understand these results, we perform micromagnetic simulations that reveal the presence of edge, standing wave, and uniform SW modes in the nanowires （NWs）. Our simulations clearly show how the standing wave and uniform SW modes coalesce to form a single mode with uniform precession over the entire NW for H 〈 0.7 kOe, reproducing the experimentally observed reduction in modes. Our study elucidates the possibility of manipulating the SW modes in magnetic nanostructures, which is useful for applications in magnonic and spintronic devices.

关键词： Field-dependent high-aspect-ratio nanowires

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：