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第35届中国控制会议

作者： Fei Wang Li Zhu Hongli Zhao State Key Lab.of Rail Traffic Control and Safety Beijing Jiaotong University National Eng.Research Center of Rail Transportation Operation and Control System Beijing Jiaotong University

ISBN: (纸本)9781509009107

Train ground communication systems for different applications are deployed and managed independently in current urban rail transit systems with Wireless Local Area Network(WLAN) technology. Investing and constructing communication infrastructures repeatedly not only waste substantial social resources but also bring many difficulties to maintain all these infrastructures. In this paper, we design an Integrated TD-LTE based train ground communication system which includes all the applications in the urban rail transit system and analyze its theoretical throughput. In order to test the throughput of the Integrated TD-LTE based train ground communication system, a real testing environment is set up. The testing environment simulates the real urban rail transit environment, including the real train and real equipment. Test results show that the designed Integrated TD-LTE based train ground communication system throughput satisfies urban rail transit communication requirement and has strong comprehensive bearing capability.

关键词： TD-LTE train-ground communication Integrated Application

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Investigation into Influence Factors of synchronous movement of Multi-cylinders

Investigation into Influence Factors of synchronous movement...

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2016 IEEE/CSAA International Conference on Aircraft Utility systems(AUS)

作者： Chao Hu Pengfei Zhang Xiaoping Ouyang Houtao Ku Qinghe Zhou Enxiao Zhang State Key Lab.of Fluid Power Transmission and Control Zhejiang University Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration State Key Lab.of Fluid Power Transmission and Control Zhejiang Univ. The High School Attached to Zhejiang University

Seal is one of the most important characteristics for cylinders and suitable seal configuration will guarantee the long life cycle of the seal and the *** is the only way which can demonstrate the best seal configuration in *** this paper,one approach is brought forward for testing the seal performance of cylinders with different seals configurations at the same load working condition for saving the test *** the test-rig,the synchronization of cylinders is one of the key *** test system is modelled in the AMESim *** effect caused by the changes of the different physical parameters is analyzed,such as load stiffness,viscous damping coefficient of cylinder,dead volume of cylinder and internal leakage *** experiment is carried out and test results agree with the simulation ***,the appropriate solution is proposed for improving the synchronization of the multi-cylinders further.

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Switching system stability analysis of DC microgrids with DBS control

Switching system stability analysis of DC microgrids with DB...

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

作者： Na Zhi Hui Zhang Xi Xiao Faculty of Automation and Information Engineering Xi'an University of technology Xi'an Shannxi China State Key Lab of Control and Simulation of Power System and Generation Equipments Tsinghua Universty Beijing China

ISBN: (纸本)9781467395519

DC microgrids are becoming popular in distribution systems based on its higher reliability and system efficiency. DC bus signal (DBS) control as a common control strategy was widely used in dc microgrids, in which, control mode of each power electronic converter is triggered by monitoring the dc voltage variation to keep the power balance of the dc microgrid. Most of the dc microgrid stability analysis are linear and based on the impedance matching theory. But the dc microgrid will be a nonlinear system when the operation mode was automatically switched based on switching information. In this paper, the switched system theory was used to analyze the stability of dc microgrids under DBS control strategy. The stability conditions in each subsystem and switched system was present in this paper and simulation results verify the effectiveness of the proposed criterion.

关键词： Microgrids Voltage control Stability analysis Satellite broadcasting Switches power system stability

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Investigation into influence factors of synchronous movement of multi-cylinders

Investigation into influence factors of synchronous movement...

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IEEE International Conference on Aircraft Utility systems (AUS)

作者： Chao Hu Pengfei Zhang Xiaoping Ouyang Houtao Ku Qinghe Zhou Enxiao Zhang State Key Lab. of Fluid Power Transmission and Control Zhejiang University Hangzhou China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing China The High School Attached to Zhejiang University Hangzhou China

ISBN: (纸本)9781509010882

Seal is one of the most important characteristics for cylinders and suitable seal configuration will guarantee the long life cycle of the seal and the cylinder. Experiment is the only way which can demonstrate the best seal configuration in applications. In this paper, one approach is brought forward for testing the seal performance of cylinders with different seals configurations at the same load working condition for saving the test time. In the test-rig, the synchronization of cylinders is one of the key technologies. The test system is modelled in the AMESim software. The effect caused by the changes of the different physical parameters is analyzed, such as load stiffness, viscous damping coefficient of cylinder, dead volume of cylinder and internal leakage coefficient. The experiment is carried out and test results agree with the simulation results. Finally, the appropriate solution is proposed for improving the synchronization of the multi-cylinders further.

关键词： Synchronization Valves Seals Damping Load modeling Springs Servomotors

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Formal modeling and performance analysis of safety communication protocol in train control system

Formal modeling and performance analysis of safety communica...

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第35届中国控制会议

作者： LIU Hongjie CHEN Lijie Eckehard Schnieder State Key Lab of Rail Traffic Control & Safety Beijing Jiaotong University National Engineering Research Center of Rail Transportation Operation & Control System Beijing Jiaotong University Institute of Standards & Measurements China Academy of Railway Sciences Institute for traffic safety and automation engineering Technical University Braunschweig

ISBN: (纸本)9781509009107

The safety communication protocol is a main factor affecting the train control system. Its performance analysis is of great significance to the train control system. After introducing the procedure of safety communication protocol in the train control system briefly, this paper first explores the application of hierarchy timed Colored Petri Net(CPN) to establish the models of the protocol, including the models of state transition process and the models with time delay and packet loss to imply the influent factors, then collects related performance data such as time for establishment of safety connection, with different time delay and probability of packet loss via simulation. The simulation results could provide a certain reference for the safety communication protocol design and development. Finally, this paper finds how the time delay and packet loss could influent the time for the establishment of safety connection through data interaction process based on theory of probability and mathematical statistic, which is reasonable.

关键词： Safety communication protocol Train control system Petri net Theory of probability Mathematical statistic

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Modeling and Simulation for Safety Redundant Architecture in Train control system

Modeling and Simulation for Safety Redundant Architecture in...

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2015 4th National Conference on Electrical,Electronics and Computer Engineering(NCEECE 2015)

作者： Hongjie Liu Bing Ning Tao Tang Yu Mu State Key Lab of Rail Traffic Control & Safety Beijing Jiaotong University National Engineering Research Center of Rail Transportation Operation & Control System Beijing Jiaotong University 101 Institute of the Ministry of Civil Affairs

ISBN: (纸本)9781510819085

It is an effective way to enhance the safety of train control system by using safety redundant architectures. This paper consider the typical safety redundant architectures, including double hot standby, 2-out-of-2, 2*2-out-of-2, and 2-out-of-3, establishes models for these architectures by Markov chain. Then the safety of different architectures are simulated using Matlab. The simulation results can provide a certain reference when choosing redundant architectures in real engineering.

关键词： train control system Markov model safety redundant architecture

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Fault Line Identification of Single Line to Ground Fault for Non-Effectively Grounded Distribution Networks with Double-Circuit Lines

Fault Line Identification of Single Line to Ground Fault for...

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IEEE power and Energy Society General Meeting

作者： Bo Jiang Xinzhou Dong Shenxing Shi Bin Wang State Key Lab. Of Control and Simulation of Power System and Generation Equipment Dept. of Electrical Engineering Tsinghua University Beijing 100084 China

ISBN: (纸本)9781467380416

Single Line to Ground (SLG) faults in non-effectively grounded networks are difficult to detect. Immune to neutral point grounding type, load conditions and system operation conditions, traveling-wave based method is an effective fault line identification method. However, due to the strong coupling between the double-circuit lines, the wavefront magnitude of them are the same, and the polarity of them are opposite. Thus, the mal-identification will be resulted under such condition. This paper analyzed the traveling wave characteristics of double-circuit lines, and proposed an improved fault line identification method based on the initial process of zero sequence currents and voltage traveling waves. Tests show that, the proposed method has high effectiveness in fault line identification of double-circuit lines in distribution networks.

关键词： distribution networks double-circuit fault line identification non-effectively grounded traveling wave Double circuit power grids line down Earth faults traveling waves single line

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A hybrid converter for energy management of EV drives

A hybrid converter for energy management of EV drives

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

作者： Teng Hu Lie Xu Lin Qiu Yongdong Li Xuejun Han Department of Electrical Engineering Northeast Dianli University Jilin China State Key Lab. of Control and Simulation of Power System and Generation Equipment Tsinghua University Beijing China

This paper proposed a novel hybrid power converter topology based on cascaded H-bridge (CHB) and matrix converter (MC) in order to improve the performance of the conventional energy management systems in EV/PHEV application. The power demand by the load is supplied by the generator and batteries, which are connected to the primary winding of the medium frequency transformer (MFT) by the matrix converter and the cascaded H-bridge respectively. The power transfer between the sources and load can be controlled and isolated by using the MFT. The cascaded H-bridge, as the energy control unit, can be used to balance the voltage/SOC of battery packages individually, significantly improve the modularity, stability and safety of EV system.

关键词： Batteries Matrix converters Energy management system-on-chip Topology Voltage control Windings

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Directional Beamforming for High-Speed Railway Communications with Frequency Offset Precorrection

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Chinese Journal of Electronics 2014年第1期23卷 163-168页

作者： CAO Yuan WEN Yinghong XU Wei XIE Xin School of Electronics and Information Engineering National Engineering Research Center of Rail Transportation Operation and Control System Beijing Jiaotong University State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University National Mobile Communications Research Lab. Southeast University

This paper considers a multi-antenna transmission strategy for high speed railway communications. In order to achieve better performance than conventional space-frequency block coding schemes, we propose a directional beamforming strategy for the High-speed railway(HSR) communication by exploiting some characteristic of the railway system including predetermined moving tracks and real-time positioning information. Moreover,for alleviating the effect of Doppler shift due to the moving train, a frequency offset precorrection method is also incorporated with direction beamforming. Theoretical Signalto-noise ratio(SNR) gain of the proposed beamforming scheme over traditional HSR communication schemes is also derived for illustrating the performance *** results verify the effectiveness of our proposed scheme even with some kind of imperfect position information available at the transmitter.

关键词： Multiple-input multiple-output(MIMO) Directional beamforming High-speed railway communications Frequency offset precorrection

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An integrative study of home energy management for residential energy consumers

An integrative study of home energy management for residenti...

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IEEE International Conference on Cyber Technology in Automation, control, and Intelligent systems

作者： Dong Zhang Peng Zeng Yanyu Zhang Shuhui Li State Grid Tianjin Electric Power Research Institute Tianjin China Key Lab. of Networked Control System Chinese Academy of Sciences Shenyang China Department of Electrical & Computer Engineering University of Alabama Tuscaloosa AL USA

This paper studies how to optimize the energy usage of home appliances in the demand response framework from the consumer's perspective. The loads of major home appliances are divided into three categories: fixed loads, regulate-able loads, and deferrable loads. For efficient usage of the home appliances, an integrative optimization of the three category loads is needed. The paper investigates the relation of the integrative optimization and individual optimization of each category load. A regression-based learning strategy is employed to learn HAVC energy consumption model for development of more efficient DR policy. The study is conducted through an integrative computational experiment approach that combines a home energy simulator and MATlab together for demand response development and evaluation. The paper examines how the integrative demand response of the residential home appliances are affected by dynamic pricing tariffs, seasons, and weather. Case studies are conducted by considering home energy consumption, dynamic electricity pricing schemes, and demand response methods.

关键词： Home appliances Energy consumption Load modeling Optimization Load management Water heating Thermostats

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