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International Conference on Computer, Mechatronics, Control and Electronic Engineering (CMCE)

作者： Chen Zhi Chen Deng-ke Zhang Yao Yu Ren National key laboratory of design technology of nuclear reactor system Nuclear Power Institute of China (NPIC) Chengdu China Department of nuclear power science and engineering Naval university of engineering Wuhan China

ISBN: (纸本)9781424479573

At present, the information and control system (I&C) and operation support system (OSS) of the nuclear power plants (NPPs) are designed separately; their structures and functions are independent. So, the compatibility, availability and dependability of them are not desirable, and the comprehensive advantages of them are not to exert fully. In order to resolve these problems, this paper presents a new idea that designing and developing the I&C and the OSS coordinately, so that their structures and functions are integrated. Firstly, this paper reviewed the evolution and application status of the OSS. And then, the realization methods and forms for the integrated system are analyzed. At last, the hierarchy and architecture of the integrated system which have the double-functions of the I&C and OSS is founded. Analysis and study is also carried out in terms of the hierarchy and characteristics of the integrated system.

关键词： Europe Instruments Reliability engineering Maintenance engineering

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Error Analysis and Improved Measures for Centralized Multi-users Electronic Energy Meters

Error Analysis and Improved Measures for Centralized Multi-u...

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International Conference on Electrical and Control Engineering (ICECE)

作者： Jiafei Yao Yu Zheng Architectural Design Research Institute Chongqing University Chongqing China State Key Laboratory of Power Transmission Equipment & System Security and New Technology College of Electrical Engineering Chongqing University China

The basic error of ADE7755 and its application in the remote meter reading system were introduced. The error between the remote meter reading data and the register displaying was detailed analyzed in centralized multi-users electronic energy meters. The power down test simulated work-site condition showed that frequent power down was the main factor causing the error. New improved methods of the hardware interface circuit and micro-controller programming were presented to achieve an agreement between the remote meter reading data and the register displaying. The application example analysis showed that the method can be widely applied in centralized multi-users electronic energy meters.

关键词： Instruments Electric variables measurement Registers Meter reading Security Laboratories Integrated circuits

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Error analysis and improved measures for centralized multi-users electronic energy meters

Error analysis and improved measures for centralized multi-u...

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International Conference on Electrical and Control Engineering, ICECE 2010

作者： Yao, Jiafei Zheng, Yu Architectural Design Research Institute Chongqing University Chongqing China State Key Laboratory of Power Transmission Equipment and System Security and New Technology College of Electrical Engineering Chongqing University China

ISBN: (纸本)9780769540313

The basic error of ADE7755 and its application in the remote meter reading system were introduced. The error between the remote meter reading data and the register displaying was detailed analyzed in centralized multi-users electronic energy meters. The power down test simulated worksite condition showed that frequent power down was the main factor causing the error. New improved methods of the hardware interface circuit and micro-controller programming were presented to achieve an agreement between the remote meter reading data and the register displaying. The application example analysis showed that the method can be widely applied in centralized multi-users electronic energy meters. © 2010 IEEE.

关键词： Errors

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Ontology-Based Product Knowledge Integration in Mobile Environment

Ontology-Based Product Knowledge Integration in Mobile Envir...

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International Conference on Control, Automation, Robotics and Vision

作者： Cao.LI Zongwu.XIE Kui.SUN Hong.LIU Yongjun.ZHENG State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin P.R.China School of Architecture Design and the Built Environment Nottingham Trent University Nottingham UK

ISBN: (纸本)9781424478149

This paper is to develop an ontology-based mobile environment for collaborative product design and manufacture, which enables geographically dispersed team members to collaborate over the internet within the total design or manufacturing process, including product design specification, conceptual design, detail design, manufacture and recycling. In this paper, a database which based on a new method named ontology is built up to demonstrate the all related information in order to achieve an efficient and convenient management. According these two achievements, a new data management system is built and tested in the mobile device and compared to the traditional data management system at the end of this paper.

关键词： ontology mobile web

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The linear source approximation in three dimension characteristics method

The linear source approximation in three dimension character...

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International Conference on Mathematics, Computational Methods and reactor Physics 2009, M and C 2009

作者： Chai, X.M. Wang, K. Yao, D. Department of Engineering Physics Tsinghua University Beijing 100084 China China State Key Laboratory of Reactor System Design Technology P.O. Box 622-509 Chengdu 610041 China

ISBN: (纸本)9781615673490

The Method of Characteristics (MOC) which can calculate arbitrary geometry neutron transport equation becomes more and more popular and is adopted in many neutron transport codes. However, the MOC codes with Flat Source Approximation (FSA) needs large storage space and long computing time when calculating large-scale three dimensional neutron transport problems. This paper proposes a new source approximation called Linear Source Approximation (LSA). By calculating several three dimensional neutron transport problems using the codes with FSA and LSA respectively, it was shown that the LSA MOC code gets more accurate results than the FSA MOC code with the same spatial meshes, and that the LSA MOC code with large meshes can get the results with the same accuracy of the FSA MOC code with fine spatial meshes. By using large spatial meshes which means there are less meshes and ray trajectories to store in memory, the LSA MOC code can calculate the three dimensional neutron transport problems with less storage and shorter computing time than FSA MOC code with fine meshes. Therefore, it is concluded that LSA MOC with large spatial meshes is able to calculate large-scale three dimensional problems with reasonable storage space and computing time.

关键词： Transport properties

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Simulation Analysis on Lightning Accident of ± 500 kV DC Transmission Line Based on ATP-EMTP

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高电压技术 2009年第4期35卷 802-808页

作者： FU Jin SIMA Wen-xia YANG Qing YANG Li-bin LI Zhi-tai State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing 400044 China Yangjiaping Power Supply Bureau Chongqing 400051 China Guangdong Electric Power Design Institute Guangzhou 510600 China

This paper calculates and researches on lightning accident of ±500 kV Xing-An DC transmission line in Guangdong based on ATP-EMTP and the simulation calculation model of the HVDC has been constructed. The results show that: when a lightning current strikes to the positive polar conductor of double circuit transmission line and the flashover of insulator strings occurs, as the over-voltage wave propagating along the lines due to the coupling effect between the conductors, the grounding electrode lines would produce the coupling voltage wave, which makes the flashover of the insulator strings occur at the different place along the grounding electrode lines, the un- balanced current of the grounding polar line is produced due to the insulator strings flashover and the unbalanced current exists for a long time, when the unbalanced current is up to the locking condition, the negative polar conductor is locked and the double-pole block fault occurs. In the paper, some effective measures are given to prevent this accident.

关键词：高压电技术闪电意外事故传输线

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Application of computer aided tolerance analysis in product design

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Hedongli Gongcheng/Nuclear Power Engineering 2009年第SUPPL. 1期30卷 82-85页

作者： Du, Hua National Key Laboratory of Reactor System Design Technology Nuclear Power Institute of China Chengdu 610041 China

This paper introduces the shortage of the traditional tolerance design method and the strongpoint of the computer aided tolerancing (CAT) method, compares the shortage and the strongpoint among the three tolerance analysis methods, which are Worst Case Analysis, Statistical Analysis and Monte-Carlo Simulation Analysis, and offers the basic courses and correlative details for CAT. As the study objects, the reactor pressure vessel, the core barrel, the hold-down barrel and the support plate are used to upbuild the tolerance simulation model, based on their 3D design models. Then the tolerance simulation analysis has been conducted and the scheme of the tolerance distribution is optimized based on the analysis results.

关键词： Product design

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Efficient method for dynamic problems and its application to the transient response analysis for functionally graded material plates

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Guti Lixue Xuebao/Acta Mechanica Solida Sinica 2009年第2期30卷 182-188页

作者： Huang, Yonghui Han, Xu Ran, Chengxin State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College of Mechanical and Automotive Engineering Hunan University Changsha 410082 China College of Information System and Management National University of Defence Technology Changsha 410073 China

In this paper, a hybrid method is developed to real-timely solve dynamic problems governed by second partial differential equation (PDE). The present method involves the combination of reduced-basis method (RBM) and implicit Newmark's method. In this method, it needs a training space, which contains the solutions corresponding to some carefully selected sample parameters and all time steps. A greedy algorithm is adopted to adaptively select basis vectors from the training space for constructing reduced basis space. It results in a reduced system by the standard Galerkin projection the matrices and loading vector. The solutions in arbitrary new parameters are approximately regenerated by solving the reduced Newmark's formulas. To further enhance the efficiency, an off-line/on-line decomposition is suggested for the computational implementation of the method. The present method is applied to analysis the transient response in an actual functionally graded material (FGM) plate. In comparison, the computational cost of transient displacement analysis in FGM plate is reduced significantly. The numerical example demonstrates the efficiency and accuracy of our algorithm.

关键词： Transient analysis

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Mixing performance analysis for advanced fuel assembly grid

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Hedongli Gongcheng/Nuclear Power Engineering 2008年第3期29卷 1-4+27页

作者： Chen, Wei-Hong Zhang, Hong Zhang, Feng-Lin Hu, Hai-Xiang Hu, De-Yong Chen, Ping Lei, Tao State Key Laboratory of Reactor System Design Technology Nuclear Power Institute of China Chengdu 610041 China

Fuel assembly grids of pressurized water reactor strengthen the coolant mixing around fuel rod through mixing structure. The size and shape of mixing vane affects the mixing performance and flow resistance. This paper introduces the process and result of grid mixing performance optimizing design. Using CFD software, three dimensional flow field of three grid design schemes are analyzed and compared. The results show that the mixing performance of scheme 3 is better than that of scheme 1 and 2 in terms of the highest fluid temperature and the most difference in temperature. And mixing performance of scheme 1 and 2 is better than that of scheme 3 in terms of typical channel average temperature.

关键词： Pressurized water reactors

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Discrete ordinates method for three-dimensional neutron transport equation based on unstructured-meshes

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中国高等学校学术文摘·能源与动力工程 2008年第2期2卷 179-182页

作者： Haitao JU Hongchun WU Dong YAO Chunyu XIAN School of Energy and Power Engineering Xi'an Jiaotong UniversityXi'an 710049China National Key Laboratory of Reactor System Design Technology Nuclear Power Institute of ChinaChengdu 610041China

A discrete ordinates method for a threedimensional first-order neutron transport equation based on unstructured-meshes that avoids the singularity of the second-order neutron transport equation in void regions was *** finite element variation equation was obtained using the least-squares method.A three-dimensional transport calculation code was *** the triangular-z and the tetrahedron elements were *** numerical results of some benchmark problems demonstrated that this method can solve neutron transport problems in unstructuredmeshes very *** most problems,the error of the eigenvalue and the angular flux is less than 0.3% and 3.0% respectively.

关键词： discrete ordinates method least-squares finite element unstructured-mesh

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