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International Conference on Smart Grid and Clean Energy Technologies

作者： Zhengwei Chang Tianhao Xu Shi Jing State Grid Electric Power Research Institute of Sichuan Province Sichuan Provincial Key Lab of Power System Wide-area Measurement and Control University of Electronic Science and Technology of China

ISBN: (纸本)9781467387729

The signal quality of auxiliary system is very important for substation to assure operation in safe conditions, but the external environment like electromagnetic interference, high or low temperature, and equipment aging will directly influence the video signal quality transferred by the auxiliary system, which makes a high demand for the cracking resistance of the auxiliary system device. This paper designs a signal quality simulator for substation auxiliary system and simulates common damage situations in the substation to reproduce the real damage situations in the laboratory environment. The results show that this simulator can provide a research platform to test the capability of anti-interference and data recovery of the auxiliary system and so on.

关键词： Simulator Signal quality Anti-interference Data recovery Substation

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Robust Exponential Stability of a Class of Markovian Jump system with Polytopic Uncertainties and Mode-dependent delays

Robust Exponential Stability of a Class of Markovian Jump Sy...

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第三十三届中国控制会议

作者： Zhaohui Chen Qi Huang Sichuan Provincial key Lab of Power System Wide-area Measurement and Control University of Electronic Science and Technology of China Department of Mathematics and Physics Chongqing University of Science and Technology

ISBN: (纸本)9781479947249

The robust stability is investigated for a class of Markovian jump system with polytopic uncertainties and mode-dependent time-varying *** the Markovian jump system,the mode of delay is different from the mode of *** appropriate parameter-dependent and mixed-mode-dependent Lyapunov-Krasovskii functional is constructed to reduce the *** on the Lyapunov-Krasovskii theory,integral inequality and reciprocally convex approach,a sufficient condition in terms of linear matrix inequalities(LMIs) is derived,which ensures the system *** developed criterion is delay-dependent,mode-dependent as well as ***,numerical examples are provided to illustrate the less conservatism of our results.

关键词： Polytopic uncertainty,Reciprocally convex approach,Linear matrix inequality(LMI),Markovian jump system

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Development and application of a portable 3-axis transient magnetic field measuring system based on AMR sensor

Development and application of a portable 3-axis transient m...

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2013 IEEE International Conference on Smart Instrumentation, measurement and Applications, ICSIMA 2013

作者： Wang, Xiaohua Huang, Qi Lu, Youliang Du, Mo Sichuan Provincial Key Lab of Power System Wide-area Measurement and Control School of Energy Science and Engineering UESTC Chengdu China

ISBN: (纸本)9781479908431

With the development of smart substations, much attention has been focused on the transient magnetic field (TMF) generated during switching operation in substations. In order to study the TMF, a portable integrated system based on Anisotropic Magneto-resistive (AMR) sensor has been developed. The system mainly consists of magnetic probe, sampling card, and industrial computer. A GPS has also been brought in to stamp the TMF events time. This system can record TMF across a bandwidth from DC to 5MHz and a dynamic range from 20mGs to 6Gs for at least 50ms continuously. laboratory tests show that the system linearity is greater than 97%, the measuring error is less than 3% and the verified rising time of input magnetic field reaches 6.4μs. Field applications are presented at last, they show that the TMF is very complex but regular to some extent, and the stable magnetic fields are in conformity with operation theory. In conclusion, the proposed system is high sensitivity, wide dynamic and relatively wide bandwidth, and it is qualified to most applications in substations. © 2013 IEEE.

关键词： Smart power grids

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Design and implementation of a non-contact magnetic field measurement based fault location system for overhead transmission line

Design and implementation of a non-contact magnetic field me...

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2013 IEEE International Conference on Smart Instrumentation, measurement and Applications, ICSIMA 2013

作者： Huang, Qi Yao, Ruoting Li, Fuchao Zhen, Wei Sichuan Provincial Key Lab of Power System Wide-area Measurement and Control School of Energy Science and Engineering UESTC Chengdu China Sichuan Electric Power Research Institute Chengdu China

ISBN: (纸本)9781479908431

As the rapid development MEMS (micro-electromechanical systems) packaging technology and magnetoresistance material technology, MR (magnetoresistive) sensors based on magnetoresistance effect which can carry out point measurement of magnetic field may change the measurement techniques in power systems. The currently available fault location of overhead transmission line approaches are mainly based on traveling-wave technique and impedance-based measurement technique. The novel approach based on non-contact measurement of magnetic field is advantageous over traditional approaches in that it is independent of the distributed line parameters and has a location error smaller than one span. In this paper, after a brief reviewing of the whole system architecture, design of a sensor prototype and the associated monitoring software are presented, and tests are performed to verify the functionalities of the designed system. The sensor is developed based on a 3-D AMR (anisotropic magnetoresistance) sensor and the software supports GIS interface, making the fault location intuitively clear and convenient. © 2013 IEEE.

关键词： Location

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A panoramic test system for intelligent substation based on wireless time synchronization technology

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Dianli Xitong Zidonghua/Automation of Electric power systems 2013年第2期37卷 72-78页

作者： Jing, Shi Huang, Qi Zhen, Wei Wang, Biao Key Lab of Wide-area Measurement and Control on Power System of Sichuan Province University of Electric Science and Technology of China Chengdu 611731 China Sichuan Electric Power Research Institute Chengdu 610072 China

The organization and distribution of information in secondary system of intelligent substation is so complex that it is almost impossible to use traditional test approach to identify the drawbacks. A novel panoramic test method based on wireless time synchronization technology is presented and the corresponding system is developed. The proposed system performs debugging test of intelligent substation secondary system under steady-state and transient state based on numerical simulation of power network, distributed injection of synchronized signals, wireless time synchronization and data transmission, etc. Total design of the test system and implement scheme of wireless synchronization technology is described. And accuracy of synchronization has been verified. The developed system has been applied to the test of many intelligent substations under construction. It shows that the proposed approach improves the integrity and the efficiency of the test, achieving better test results. © State Grid Electric power Research Institute Press.

关键词： Synchronization

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A new wireless time synchronization approach for whole-view test system in smart substation

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Dianli Xitong Zidonghua/Automation of Electric power systems 2013年第9期37卷 103-109页

作者： Jing, Shi Huang, Qi Zhen, Wei Wu, Jie Key Lab. of Wide-Area Measurement and Control on Power System of Sichuan Province University of Electronic Science and Technology of China Chengdu 611731 China Sichuan Electronic Power Research Institute Chengdu 610072 China

The whole-view test method for smart substation is a new test approach in which data transmission and time synchronization are implemented with wireless communication. This paper proposes a new time synchronization method based on wireless local area networks (WLAN) to satisfy the demand of synchronized triggering of data and time labeling in the system. The proposed method is implemented by integrating IEEE 1588 precise time protocol and IEEE 802.11 WLAN standard considering the specialty of transmission mechanism and data link in wireless communication, thus current available time synchronization method is improved. Simulation result shows that the precision of wireless time synchronization can be improved up to ±10 μs. © 2013 State Grid Electric power Research Institute Press.

关键词： IEEE Standards

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Icing monitoring system based on Fiber Bragg Grating sensor for overhead transmission lines

Icing monitoring system based on Fiber Bragg Grating sensor ...

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IEEE International Conference on Smart Instrumentation, measurement and Applications (ICSIMA)

作者： Zhihang Xue Qi Huang Changhua Zhang Yongxing Cao Ran Zhang Sichuan Provincial Key Lab of Power System Wide-area Measurement and Control University of Electronic Science and Technology of China (UESTC) Chengdu China Sichuan Electric Power Research Institute Chengdu China

Online monitoring of power devices' state is a very important part of the Smart Grid (SM) building plan. Icing on the overhead transmission lines cause great accidents and vast economic loss. In China, icing monitoring technology and relative research is a hot point. The current operating icing monitoring systems based on electrical measurement do not work efficiently because it cannot solve the problem of electromagnetic interference with power supply. The fiber optic sensors, with light as the measurement media, solve those problems perfectly. In this paper, an icing monitoring system based on Fiber Bragg Grating (FBG) sensors is proposed. The system architecture design, the sensors fixing methods, and the development of the monitoring software, are introduced in detail.

关键词： Monitoring Conductors power transmission lines Optical fiber sensors Fiber gratings Strain

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An anti mode mixing emd algorithm for detecting the characteristics of low frequency oscillations in power system

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Telkomnika - Indonesian Journal of Electrical Engineering 2013年第8期11卷 4742-4750页

作者： Yi, Jianbo Huang, Qi Jing, Shi Ding, Lijie University of Electric Science and Technology of China Key Lab of Wide-area Control and Measurement on Power System of Sichuan province Chengdu China Sichuan Electric Power Research Institute Chengdu China

The dynamics of modern interconnected power system is characterized by low frequency oscillations (LFOs) which are produced as results of various disturbances such as changes in loads, tripping of lines, faults, and other discrete events. A data driven empirical mode decomposition (EMD) method is applied to the detection of low frequency oscillation modes from disturbed trajectory with its strong non-stationary signal processing capability, but the mode mixing phenomenon serious impact on the analysis credibility and accuracy of EMD method. In this paper, an anti mode mixing EMD composite algorithm is proposed for detecting the characteristics of LFOs in power system. First, the improved frequency heterodyne method is proposed to increase the spectral distance between adjacent mode components in order to meet the octave resolution requirements. Second, the wavelet singularity detection technology is proposed to determine the adaptive sliding analysis window for each mode, in which there implements the intermittency mixed modes separation and their nonstationary parameters identification. Finally, the analysis result of interconnected grid test case verify that the proposed algorithm can effectively overcome the impact of the mode mixing existed in EMD and improve the characteristics detection accuracy of LFOs characteristics. © 2013 Universitas Ahmad Dahlan.

关键词： Mixing

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Application study on distribution network operations management system based on smart phones

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Journal of Convergence Information Technology 2012年第23期7卷 476-483页

作者： Yi, Jianbo Li, Yongbin Huang, Qi He, Sihai Sichuan Provincial Key Laboratory of Power System Wide-Area Measurement and Control University of Electronic Science and Technology of China UESTC Chengdu Sichuan Province 611731 China Jianyang Power Supply Bureau Sichuan Electric Power Company Jianyang Sichuan Province 641400 China

An application system of distribution network field operation and management (DNFQMS) based on smart phones and hybrid network communication technology is presented in this paper. The distribution network operation and maintenance management as an important part of the security of electricity supply is required to have high efficiency and reliability. In order to overcome the low efficiency and less standardized problems in traditional distribution network operation and maintenance, the novel DNFQMS proposed employs smart phones equipped with windows mobile operation system and mobile communication with general packet radio service (GPRS), then utilizes Internet to constructive web servers and mobile clients information system. The first step is to develop smart phones application software, which uses C# language to implement the field operations data real-time collection and process. The second step is web server design which has the ability to handle multimedia information and global position system (GPS) information. Finally, the E-sheet, multimedia and GPS data transmission technology are described in detail. Furthermore, the system performance test and the user application analysis verify the validity and reliability of the proposed system in the present paper.

关键词： Efficiency

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The Adequacy Model and Analysis of Swapping Battery Requirement for Electric Vehicles

The Adequacy Model and Analysis of Swapping Battery Requirem...

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IEEE power and Energy Society General Meeting

作者： Chang-Hua Zhang Jin-Song Meng Yong-Xing Cao Xin Cao Qi Huang Qing-Chang Zhong School of Energy Science and Technology of University of Electronic Science and Technology of China (UESTC) and Sichuan Provincial Key Lab of Power System Wide-area Measurement and Control of UESTC Chengdu Sichuan 611731 China. Since Oct. 2011 Changhu Sichuan Electric Power Research Institute No. 23 Qinghua Rd. Chengdu 610072 Sichuan China Department of Aeronautical and Automotive Engineering Loughborough University Leicestershire LE11 3TU UK

ISBN: (纸本)9781467327275

Compared with fossil fuel vehicles, plug-in hybrid electric vehicles (PHEVs) and electric vehicles (EVs) maintain obvious and profound significance for the less city pollutant and operation noise. Moreover, EVs can benefit operation of the power systems via friendly feeding back the energy stored in the EV batteries into the grids when needed. The related research about charging of batteries for EVs has been extensively developed, which is one of the main issues for the application of EVs. This paper focuses on the cooperation between the battery demand and the supply curve problems, when the charging of EV is operated in the swapping way. Firstly, the concept of the swapping battery requirement (SBR) adequacy is presented, and then the corresponding mathematical model is established and the algorithm based on the Monte Carlo method is proposed. In addition, some critical factors which have great influence on the SBR and reserved fully charged battery (RFCB) curves are demonstrated, such as EVs driving cycle, battery capacity, average energy-consuming level and charging time. Simulation results are presented to verify the proposed method.

关键词： Index Terms-- Adequacy Charging management Demand and supply Electrical Vehicle Monte Carlo method Plug-in Hybrid Electrical Vehicle Swapping battery requirement Vehicle-to-grid (V2G). Electric vehicles Batteries Swap charging Monte Carlo technique power systems SBR Mathematical Model ADEQUACY grids Analysis

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