检索结果-内蒙古大学图书馆

control OF POWER systemS WITH FACTS DEVICES CONSIDERING DIFFERENT LOAD CHARACTERISTICS

IFAC Proceedings Volumes 2005年第1期38卷 239-244页

作者： Ingo Winzenick Michael Fette Joachim Horn Helmut-Schmidt-University / University of the Federal Armed Forces Hamburg Department of Electrical Engineering Institute of Automatic Control Engineering Holstenhofweg 85 D–22043 Hamburg Germany System & Dynamik Beratungsunternehmen Tempelhoferstraße 37 D–33100 Paderborn Germany

Power systems form one of the largest and most complex technical systems. Changes of load parameters may lead to so called bifurcations, resulting in nonlinear phenomena like voltage collapse or interarea oscillations. Special software tools are able to simulate these systems and to identify bifurcations. This paper presents a systematic approach to determine gain factors of Flexible AC Transmission Devices (FACTS) considering changes of load parameters. This approach is applied to two different power system models.

关键词： Nonlinear systems Power systems Load Model Voltage Collapse Critical Points Hopf Bifurcation

来源：评论

学校读者我要写书评

暂无评论

A combined SOC estimation method under varied ambient temperature for a lead-acid battery

A combined SOC estimation method under varied ambient temper...

引用

Annual IEEE Conference on Applied Power Electronics Conference and Exposition (APEC)

作者： M. Coleman C.B. Zhu C.K. Lee W.G. Hurley Power Electronics Research Centre National University of Ireland Galway Ireland Department of Automation Measurement and Control Engineering Harbin Institute of Technology Harbin China

This paper describes a practical ambient temperature dependant battery state of charge (SOC) estimation algorithm that can determine the SOC of a battery operating under load conditions. SOC is an essential parameter in a monitoring system, which is the basis of a battery management system (BMS). Temperature has a profound effect on the actual capacity or SOC of the battery. The proposed model in this paper determines the SOC by incorporating the changes occurring to charge acceptance, power deliverable and internal resistance due to the variations in temperature.

关键词： Temperature dependence Equivalent circuits Voltage Chemicals Power system modeling Power electronics automation Battery charge measurement Power measurement Power engineering and energy

来源：评论

学校读者我要写书评

暂无评论

Analysis of different crystalliser configurations to perform preferential crystallisation

Analysis of different crystalliser configurations to perform...

引用

作者： Elsner, M.P. Muslera, E. Alonso Angelov, I. Fernaśndez Menéndez, D. Lorenz, H. Polenske, D. Vollmer, U. Raisch, J. Seidel-Morgenstern, A. Max Planck Institute for Dynamics of Complex Technical Systems Physical and Chemical Foundations of Process Engineering Sandtorstr. 1 39106 Magdeburg Germany Max Planck Institute for Dynamics of Complex Technical Systems Systems and Control Theory Group Sandtorstr. 1 39106 Magdeburg Germany Otto von Guericke University Department of Chemical Engineering Universitätsplatz 2 39106 Magdeburg Germany Otto von Guericke University Department of System Theory of Process Engineering PO Box 4120 39106 Magdeburg Germany

The intention of this paper is the analysis of general concepts for preferential crystallisation with the focus on aspects of quantification. In this preliminary examination, the amino acid threonine was used as a model system. The use of on-line polarimetry in combination with on-line densimetry as well as microscopic investigation enables to obtain some indispensable information about the crystallisation kinetics. Taking these estimated values into consideration a simplified mathematical description as a first approach including a population balance model was established for the simulation of the time changes of liquid phase composition during the preferential crystallisation process. Based on this simplified model different crystalliser configurations were investtigated.

关键词： Crystallization

来源：评论

学校读者我要写书评

暂无评论

Design of a vision-based sensor for autonomous pig house cleaning

Design of a vision-based sensor for autonomous pig house cle...

引用

作者： Braithwaite, Ian Blanke, Mogens Zhang, Guo-Qiang Carstensen, Jens Michael Automation Section Ørsted-DTU Technical University of Denmark 2800 Kongens Lyngby Denmark Danish Institute of Agricultural Sciences Research Centre Bygholm P.O. Box 536 8700 Horsens Denmark Informatics and Mathematical Modelling Technical University of Denmark 2800 Kongens Lyngby Denmark Technical University of Denmark Department of Automation Technical University of Denmark IFAC International Federation of Automatic Control IEEE Danish Institute of Agricultural Sciences China Agricultural University Danish Society of Engineers Danish Society of Agricultural Engineering European Agricultural Engineering Technical University of Denmark

Current pig house cleaning procedures are hazardous to the health of farm workers, and yet necessary if the spread of disease between batches of animals is to be satisfactorily controlled. Autonomous cleaning using robot technology offers salient benefits. This paper addresses the feasibility of designing a vision-based system to locate dirty areas and subsequently direct a cleaning robot to remove dirt. Novel results include the characterisation of the spectral properties of real surfaces and dirt in a pig house and the design of illumination to obtain discrimination of clean from dirty areas with a low probability of misclassification. A Bayesian discriminator is shown to be efficient in this context and implementation of a prototype tool demonstrates the feasibility of designing a low-cost vision-based sensor for autonomous cleaning.

关键词： Computer vision

来源：评论

学校读者我要写书评

暂无评论

Web-Based MATHEMATICA Platform for systems and controls Education

Web-Based MATHEMATICA Platform for Systems and Controls Educ...

引用

IEEE International Symposium on Intelligent control (ISIC)

作者： P. Kujan M. Hromcik M. Sebek Institute of Information Theory and Automation Centre for Applied Cybernetics Praque Czech Republic Department of Control Engineering Faculty of Electrical Engineering Czech Technical University Prague Czech Republic Centre for Applied Cybernetics Faculty of Electrical Engineering Czech Technical University Prague Czech Republic Institute of Information Theory and Automation AS CR Praque Czech Republic

Computer algebra software tools in general, and the MATHEMATICA system in particular, are increasingly employed during the controls and systems graduate and undergraduate courses at FEE CTU in Prague. MATHEMATICA benefits from its high-level user interface, graphical abilities, as well as numerical and symbolic computational power and dedicated packages for control systems analysts and design (control systems professional and advanced numerical methods). In addition, MATHEMATICA provides a Web-based platform for publication of results and presenting user-callable routines (webMATHEMATICA). In the Czech Republic a project financed by the Ministry of Education and called PUMA (power user mathematic array) has been started recently, focused on creation of Web-accessible software tools to support education at technical universities. The authors have been involved in these efforts and would like to contribute by creating a Web site based on webMATHEMATICA dedicated to numerical and symbolic computations for systems and controls. This paper is the first report on this topic. The work is in rapid progress now and the paper summarizes the authors' plans and first results

关键词： control systems Software tools Computer science education Algebra User interfaces Computer interfaces Packaging control system analysis Mathematics Educational institutions

来源：评论

学校读者我要写书评

暂无评论

Practical approach to real-time trajectory tracking of UAV formations

Practical approach to real-time trajectory tracking of UAV f...

引用

American control Conference (ACC)

作者： B. Vanek T. Peni J. Bokor G. Balas Department of AeroSpace Engineering and Mechanics University of Minnesota Minneapolis MN USA Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences (ATOMKI) Budapest Hungary

An unmanned aerial vehicle (UAV) formation in a leader-follower structure, where the UAVs are flying a common trajectory determined by a route planner hosted on the leader is considered. The path description is compressed by polynomial functions with respect to the flight envelope constraints and transmitted to the followers, where a model predictive control (MPC) outer loop controller specifies the command signals for the 7-h locally controlled dynamics with respect to the nonlinear constraints of the aircraft dynamics. Real time feasibility issues associated with the design are discussed.

关键词： Trajectory Unmanned aerial vehicles Communication system control Aerodynamics Aircraft Vehicle dynamics Predictive models Predictive control Aerospace control Polynomials

来源：评论

学校读者我要写书评

暂无评论

Assessing the technical value of FACTS-based wide-area damping control loops

Assessing the technical value of FACTS-based wide-area dampi...

引用

2005 IEEE Power engineering Society General Meeting

作者： Kamwa, I. Heniche, A. Trudel, G. Dobrescu, M. Grondin, R. Lefebvre, D. IEEE Hydro-Québec IREQ1800 boul. Lionel-Boulet Varennes Que. J3X 1S1 Canada Hydro-Québec TransÉnergie Complexe Desjardins Montréal Que. H5B1H7 Canada HydroQuebec Research Institute CIGRÉ System Dynamic Performance Committee AdCom Power System Analysis Operation and Control Department IEEE Power Engineering Society System Planning Department Hydro-Quebec TransEnergie Division Hydro-Quebec research institute IREQ

ISBN: (纸本)078039156X

Engineers intuit that, as power systems interconnect more and more to exchange large amounts of power over longer transmission lines, wide-area damping control should become increasingly rewarding. However, given the current technological and psychological barriers, decision makers need tools to assess whether the inherent advantages of wide-area control over local control can outweigh the risk incurred by the additional complexity of the underlying telecommunication and SCADA systems. This paper devises a simple small signal analysis-based methodology for pinpointing control sites where wide-area control has a substantial technical advantage over a purely local control. Using a novel fuzzy logic-based PSS scheme applicable to both Static Var Compensators (SVC) and Synchronous Condensers (SC), the authors first demonstrate the claims of their paper on an interesting three-area power system proposed by Anderson and Farmer. Based on small- and large-signal studies, the findings are then generalized to a large study network from Québec's provincial ISO, equipped with SVCs and SCs at six and four 735-kV substations respectively, all of them included in the scope of this study. Overall, wide-area control is consistently three to 20 times more efficient technically than the competing local control, depending on the network and the control site. © 2005 IEEE.

关键词： control systems

来源：评论

学校读者我要写书评

暂无评论

Optimization of finite interval CMA implementation for FPGA

Optimization of finite interval CMA implementation for FPGA

引用

IEEE Workshop on Signal Processing systems (SIPS)

作者： A. Hermanek J. Schier P. Sucha Z. Hanzalek Institute of Information Theory and Automation Academy of Sciences슠of the슠Czech Republic Czech Republic Centre for Applied Cybernetics Department of Control Engineering Czech Technical University Czech Republic

The paper deals with optimization of an FPGA implementation of iterative algorithms with nested loops, using integer linear programming. The scheduling is demonstrated on an example of the FI-CMA blind equalization algorithm, with implementation using limited (and small) number of arithmetic units with non-zero latency. The optimization is based on cyclic scheduling with precedence delays for distinct dedicated processors. The approach is based on construction of an optimally scheduled abstract model, modeling imperfectly nested loops.

关键词： Field programmable gate arrays Iterative algorithms Integer linear programming Processor scheduling Delay Equalizers Scheduling algorithm Arithmetic Information theory automation

来源：评论

学校读者我要写书评

暂无评论

On selection of supplementary input signals for STATCOM to damp inter-area oscillations in power systems

On selection of supplementary input signals for STATCOM to d...

引用

2005 IEEE Power engineering Society General Meeting

作者： Farsangi, Malihe M. Song, Yong Hua Lee, Kwang Y. IEEE Kerman University Kerman Iran Brunel Institute of Power System Brunel University Uxbridge UB8 3PH United Kingdom Department of Electrical Engineering Pennsylvania State University University Park PA 16802 United States Brunel of Power Systems Brunel Institutes of Power Systems Brunel University Uxbridge United Kingdom Univ. of Houston MI Univ. of Houston OR Pennsylvania State University Department of Electrical Engineering Power Systems Control Laboratory

ISBN: (纸本)078039156X

This paper proposes a method to select the supplementary input signal for systems equipped with STATic synchronous COMpensators (STATCOM) to damp inter-area mode(s). Input-output observabiliy-controllability analysis, minimum singular value, right half plane zeros and relative gain array are used to assess the most appropriate supplementary input signal. The open-loop frequency of the system is shown to examine the sensitivity of the selected supplementary input signal to inter-area mode. The method is applied to select the input signal for a small power system equipped with a single STATCOM and for a large power system equipped with two STATCOMs. © 2005 IEEE.

关键词： Electric power systems

来源：评论

学校读者我要写书评

暂无评论

Geomagnetic field from KOMPSAT-1 magnetometer measurements

Geomagnetic field from KOMPSAT-1 magnetometer measurements

引用

IEEE International Symposium on Geoscience and Remote Sensing (IGARSS)

作者： Jeong Woo Kim Jong-Sun Hwang Seon-Ho Lee Kyung Duck Min Hyung Rae Kim Department of Geoinformation Engineering Sejong University South Korea Department of Earth System Sciences Yonsei University South Korea Satellite Control system Department Korea Aerospace Research Institute South Korea NASA Goddard Space Flight Center Greenbelt MD USA

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：