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International Universities Power engineering Conference (UPEC)

作者： Kun Liu Xinzhou Dong Zhiqian Bo State Key Laboratory of Control and Simulation of Power System and Generation Equipments Department of Electrical Engineering Tsinghua University Beijing China AREVA T&D Automation슠and Information Systems Staffordshire UK

Non Conventional Instrument Transformer (NCIT) and IEC 61850 are crucial technologies in digital substations. But they bring some new uncertainties to protection IEDs, especially the time synchronization issue in current differential protection. The paper analyzes the time delay of transferring sampled values from NCIT to current differential relay in NCIT and IEC61850 based digital substation, then finds out the delay-non-deterministic problem, at last presents a novel current differential protection scheme by using Phase-Locked Loops (PLL ) technology.

关键词： Substations Delay effects Synchronization IEC Phase locked loops Data communication Ethernet networks

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Study of Non-Conventional Instrument Transformer and IEC61850 impact on current differential protection

Study of Non-Conventional Instrument Transformer and IEC6185...

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IEEE/PES Transmission and Distribution Conference and Exposition: Latin America

作者： K. L. S. Shenxing X. Dong Z. Bo State Key Lab of Control and Simulation of Power System and Generation Equipments Department of Electrical Engineering Tsinghua University Beijing 100084 China Tsinghua University Beijing Beijing CN State Key Laboratory of Control and Simulation of Power System and Generation Equipments Department of Electrical Engineering Tsinghua University Beijing China AREVA T&D Automation슠and Information Systems Stafford UK

Non conventional instrument transformer (NCIT) and IEC 61850 are crucial technologies in digital substations. But they bring some new uncertainties to protection IEDs, especially the time synchronization issue in current differential protection. The paper analyzes the time delay of transferring sampled values from NCIT to current differential relay in NCIT and IEC61850 based digital substation, then finds out the delay-non-deterministic problem, at last presents a novel current differential protection scheme by using phase-locked loops (PLL ) technology.

关键词： Substations Delay effects Ethernet networks Phase locked loops IEC Synchronization Data communication

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Packet-loss dependent controller design for networked control systems via switched system approach

Packet-loss dependent controller design for networked contro...

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IEEE Conference on Decision and control

作者： Junyan Yu Long Wang Mei Yu Yingmin Jia Jie Chen Intelligent Control Laboratory Center for Systems and Control College of Engineering Peking University Beijing China Department of Automation North China Electric Power University Zhuxinzhuang Beijing China The Seventh Research Division Beihang University Beijing China Beijing Institute of Technology Key Laboratory of Complex System Intelligent Control and Decision Ministry of Education Beijing China

ISBN: (纸本)9781424431236

The stabilization problem of networked control systems with bounded packet loss is addressed. We model such networked control systems as a class of switched systems, and present sufficient conditions for the stabilization by using a packet-loss dependent Lyapunov function. Moreover, different from existing results, we propose the design for packet-loss dependent stabilizing controllers for two types of packet-loss processes: one is a arbitrary packet-loss process, and the other is a Markovian packet-loss process. Several numerical examples and simulations are worked out to demonstrate the effectiveness of the proposed design technique.

关键词： control systems Networked control systems Switched systems Sufficient conditions Optimal control Delay effects Communication system control Communication system traffic control Feedback control Electrical equipment industry

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An Indoor Localization Algorithm for Lighting control using RFID

An Indoor Localization Algorithm for Lighting Control using ...

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IEEE Energy 2030 Conference, ENERGY

作者： Zi-Ning Zhen Qing-Shan Jia Chen Song Xiaohong Guan Department of Automation Tsinghua University Beijing China Center for Intelligent and Networked Systems (CFINS) Tsinghua National Laboratory for Information Science and Technology Department of Automation Tsinghua University Beijing China United Technologies Research Center China and the Tsinghua-UTC Research Institute for Integrated Building Energy Safety and Control Systems Beijing 100084 P. R. China (phone: +86-10-62772183 fax: +86-10-62770554 e-mail: songc@***) SKLMS Laboratory and System Engineering Institute Xi''an Jiaotong University Xi'an China

Occupant's identity and location are important information for lighting control in order to reduce the energy consumption while increasing livelihood. While active RFID system provides occupant's identity, it is nontrivial to localize the occupant's location in an indoor environment due to the multipath effect, the changing environment, and the unreliable communication link. In this paper, we implement a system with multiple active RFID readers, and develop a localization algorithm based on support vector machine (SVM). The algorithm uses round-robin comparison to localize the occupant to one of the multiple regions in a floor. The geometric relationship among the rooms and the historical localization data are used to further improve the localization accuracy. Numerical results demonstrate a high localization accuracy of this algorithm. We hope this work sheds insight on lighting control for energy saving and an increased livelihood.

关键词： Lighting control Radiofrequency identification Energy consumption Active RFID tags Educational institutions Indoor environments Round robin Support vector machines Humans Safety

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International Collaboration in Synchronized Measurement Experiment in Russia

International Collaboration in Synchronized Measurement Expe...

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Power systems Conference on Advanced Metering, Protection, control, Communication and Distributed Resources

作者： Grobovoy, Andrey Bondareva, Natalia Stepanov, Vladimir Atienza, Edsel Power System Emergency Control Laboratory Ltd Siberian Electric Power Research Institute Russian Federation ABB Automation Schweitzer Engineering Laboratories Inc. United States

ISBN: (纸本)9781424408542

The paper discusses the results of the synchronized measurement experiment recently conducted in the Russian Far East Interconnected Power system. An international team of experts conducted a set of unique tests in the bulk power system. The tests used five devices for synchronized phasor measurement. In conjunction with digital fault recorders (DFRs), the phasor measurement units (PMUs) were able to demonstrate the feasibility of using PMUs to monitor and control the Russian Far East Interconnected Power system.

关键词： Phasor measurement units

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Research on rough set theory and applications in China

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Lecture Notes in Computer Science

作者： Wang, Guoyin Zhang, Qinghua Huang, Houkuan Ye, Dongyi Hu, Qinghua Hu, Xuegang Shi, Zhongzhi Li, Yongli Shang, Lin An, Liping Sai, Ying Chen, Shanben Liang, Jiye Qin, Keyun Zeng, Huanglin Xie, Keming Miao, Duoqian Min, Fan Wu, Zhaocong Wu, Weizhi Dai, Jianhua Institute of Computer Science and Technology Chongqing University of Posts and Telecommunications Chongqing 400065 China School of Information Science and Technology Southwest Jiaotong University Chengdu 610031 China School of Computer and Information Technology Beijing Jiaotong University Beijing 100044 China College of Math. and Computer Fuzhou University Fuzhou 350002 China Harbin Institute of Technology PO Box 458 Harbin 150006 China School of Computer and Information Hefei University of Technology Hefei 230009 China Institute of Computing Technology Chinese Academy of Sciences Beijing 100080 China Lanzhou University No.222 Tianshui South Rd. Lanzhou 730000 China State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210093 China Management Science and Engineering Department Business School Nankai University Tianjin 300071 China Shandong University of Finance No.40 Shun-geng Road Jinan 250014 China Welding Engineering Institute Shanghai Jiaotong University Shanghai 200030 China School of Computer and Information Technology Shanxi University Taiyuan 030006 China Intelligent Control Development Center Southwest Jiaotong University Chengdu 610031 China Artificial Intelligence of Key Laboratory Sichuan University of Science and Engineering Zigong 643000 China Department of Automation College of Information Engineering Taiyuan University of Technology Taiyuan 030024 China 4800 CaoAn Highway Shanghai 201804 China School of Computer Science and Technology University of Electronic Science and Technology of China Chengdu 610054 China School of Remote Sensing Information Engineering Wuhan University Wuhan 430079 China Institute for Information and System Sciences Faculty of Science Xi'an Jiaotong University Xi'an 710049 China Information College Zhejiang Ocean University Zhejiang 316004 China Institute of Artificial Intelligence Zhejiang University Hangzhou 310027 China

ISBN: (纸本)3540850635

This article gives a capsule view of research on rough set theory and applications ongoing at universities and laboratories in China. Included in this capsule view of rough set research is a brief description of the following things: Chinese research groups on rough set with their URLs for web pages, names of principal researchers (supervisors), numbers of graduate students, and topics being investigated. Statistical summaries showing the growth in the research on rough set theory and application in China are included. In addition, an introduction summarizing the research interests of Chinese researchers is included in this article. The contribution of this article is a complete overview of the principal research directions in rough set theory and its applications in China. © 2008 Springer-Verlag Berlin Heidelberg.

关键词： Rough set theory

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Grey systems for intelligent sensors and information processing

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Journal of systems engineering and Electronics 2008年第4期000卷

作者： Chen Chunlin Dong Daoyi Chen Zonghai Wang Haibo Chen Chunlin (Dept.of Control and System Engineering School of Management and EngineeringNanjing Univ.Nanjing 210093P.R.China State Key Laboratory for Novel Software Technology Nanjing Univ.Nanjing 210093P.R.China) Dong Daoyi (State Key Laboratory for Novel Software Technology Nanjing Univ.Nanjing 210093P.R.China) Chen Zonghai (Dept.of Automation Univ.of Science and Technology of ChinaHefei 230027P.R.China)

In a measurement system,new representation methods are necessary to maintain the uncertainty and to supply more powerful ability for reasoning and transformation between numerical system and symbolic system.A grey measurement system is discussed from the point of view of intelligent sensors and incomplete information processing compared with a numerical and symbolized mea8urement *** methods of grey representation and information processing are proposed for data collection and *** a case study,multi-ultrasonic sensor systems are demonstrated to verify the effectiveness of the proposed methods.

关键词： grey system grey sensors information processing

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Comparison between model based controllers for a distributed solar collector field 9

Comparison between model based controllers for a distributed...

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2007 9th European control Conference, ECC 2007

作者： Galvez-Carrillo, M. De Keyser, R. Ionescu, C. Department of Control Engineering and System Analysis Université Libre de Bruxelles Av. F.D. Roosevelt 50 - CP 165/55 BrusselsB-1050 Belgium EeSA Department of Electrical Energy Systems and Automation Ghent University Technologiepark 913 GentB-9052 Belgium

ISBN: (纸本)9783952417386

This work presents the comparison between the results obtained from applying three different control strategies for regulating the temperature in a distributed solar collector (DSC) field. A nonlinear predictive control strategy, the Nonlinear Extended Prediction Self-Adaptive control (Nonlinear EPSAC or NEPSAC), is compared with a linear predictive controller and a PI controller. All control strategies include a Smith Predictor and use a model of the process for the tuning of the controllers. Simulations on a model based on physical and geometric properties of the solar field are performed and controllers are validated on real data measurements. © 2007 EUCA.

关键词： Solar energy

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Application of a Smith Predictor based nonlinear predictive controller to a Solar Power Plant

Application of a Smith Predictor based nonlinear predictive ...

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作者： Gálvez-Carrillo, Manuel De Keyser, Robin Ionescu, Clara Department of Control Engineering and System Analysis Université Libre de Bruxelles Av. F.D. Roosevelt 50-CP165/55 B1050 Brussels Belgium Department of Electrical Energy Systems and Automation Ghent University Technologiepark 913 B9052 Gent Belgium

ISBN: (纸本)9783902661289

Renewable energies are gaining space in the energy generation panorama, thanks to technological advances and policy support. To take profit of these energies in an optimal and sustained way, research of new control strategies becomes imperative. This work presents the study and application of a nonlinear control strategy, where a Smith Predictor is added to the Nonlinear Extended Prediction Self-Adaptive control (NEPSAC), for the control of a Solar Power Plant. Different simulations are performed to study the effect of the design parameters in the dynamic behavior of the system. Copyright © 2007 IFAC.

关键词： Solar energy

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International collaboration in synchronized measurement experiment in Russia

International collaboration in synchronized measurement expe...

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Power systems Conference: Advanced Metering, Protection, control, Communication, and Distributed Resources, PSC

作者： Andrey Grobovoy Natalia Bondareva Vladimir Stepanov Edsel Atienza Power System Emergency Control Laboratory Limited Siberian Electric Power Research Institute Serbia ABB Automation Switzerland Schweitzer Engineering Laboratories Inc. USA

关键词： International collaboration Power system interconnection Power system faults Power system measurements Phasor measurement units Power measurement system testing Monitoring control systems Power system control

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