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2017 3rd IEEE International Conference on control Science and Systems engineering (ICCSSE)

作者： Hai Rong Sun Peng Sun School of Control and Computer Engineering North China Electric Power University Hebei Engineering Research Center of Simulation & Optimized Control for Power Generation

ISBN: (纸本)9781538604854

As the pollution of the modern society, the circulating fluidized bed boiler, typical of new type, efficiency and low pollution, is booming. Nevertheless, its combustion process is more sophisticated than the common one. As that, it is difficult to build an accurate digital model. As the control effect, the traditional PID is less easy to be effective. The bed temperature is an important parameter in the operation of the circulating fluidized bed boiler, and is the key to the failurefree operation. The fuzzy controller was designed to the bed temperature and was proofed through the simulation experiment of the Matlab. The result has demonstrated that for the control of the sophisticated system, fuzzy control is the best way to achieve the intended goal, compared with the PID the common one.

关键词： circulating fluidized bed bed temperature fuzzy controller

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Continuous Attribute Reduction Method Based on an Automatic Clustering Algorithm and Decision Entropy 36

Continuous Attribute Reduction Method Based on an Automatic ...

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第36届中国控制会议

作者： Hairong Sun Rui Wang Bixia Xie Yao Tian School of Control and Computer Engineering North China Electric Power University Hebei Engineering Research Center of Simulation & Optimized Control for Power Generation

ISBN: (纸本)9781538629185

The data in the process of power plant are mostly *** at the problems existing in the discretization of the continuous attributes with associated relationship,a strategy combining k-means clustering algorithm and the degree of compatibility of the decision table was *** degree of compatibility was taken as judgment conditions to determine whether a new cluster type is added,while ensuring that the degree of compatibility can be *** method take full account of the relationship among *** automatic clustering is realized when discretizing the continuous attributes,which makes the clustering results effective and *** attribute reduction algorithm based on approximate decision entropy is used to extract the main relations of the system,and the dimensionality of the data set can be effectively *** improved scheme is applied to continuous data of main steam temperature system of thermal power plant,and the validity of the method is verified.

关键词： Automatic clustering Continuous attribute Attribute reduction Decision Entropy Degree of compatibility

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A Fusion Method of Dual Mode Process Tomography Based on D-S Evidence Theory 29

A Fusion Method of Dual Mode Process Tomography Based on D-S...

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第29届中国控制与决策会议

作者： Zhining Si Pei Tian Department of Automation North China Electric Power University Hebei Engineering Research Center of Simulation & Optimized Control for Power Generation

ISBN: (纸本)9781509046584

In order to improve the image quality of multiphase flow process tomography system,a new fusion method of dual mode process tomography based on D-S evidence theory is *** CT system,due to the small angle of projection,the reconstructed image edge prone to distortion,but Ray's hard field characteristics determine the image has a higher resolution;and ECT system,as the "soft field" characteristic of sensitive field,making the edges of the image with the actual situation reconstruction matches,but lower image *** on the analysis of the imaging mechanism and the aim of the fusion,the D-S evidence theory is applied to the CT/ECT image fusion,and the basic probability assignment is indicated by the distance between the gray value and the cluster *** simulation results show that the proposed method can improve the quality of reconstructed image,and it is verified by the root mean square error.

关键词： Process tomography D-S evidence theory Image fusion Basic probability assignment function

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Modeling and simulation of Double Capacity Tank Level control System Based on Linear Graph Theory

Modeling and Simulation of Double Capacity Tank Level Contro...

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第37届中国控制会议

作者： Hui Leng Yue Zhang North China Electric Power School of Control and Computer Engineering Hebei Power Generation Process Simulation and Optimization Control Engineering Technology Research Center

The double-capacity tank liquid level system has the characteristics of inertia,time delay and *** practical industrial objects can be abstracted as the tank model to describe their working *** techniques are widely used to assist in representing dynamic system models,while linear graphs represent the internal relationships between components in a *** to the linear graph modeling theory,this paper takes the double-capacity water tank as the research object,and establishes the mathematical model of the tank liquid level control *** simulate the system on this basis,and the transfer function of the system is obtained based on the state space equation,the correctness of the transfer function is verified by the equivalent impedance *** simulation results show that the modeling of linear graph theory can ensure that the model can better reflect the true characteristics of the system.

关键词： Double Capacity Tank Linear Graph Theory State Space Equation Equivalent Impedance Method

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Modeling and simulation of Double Capacity Tank Level control System Based on Linear Graph Theory

Modeling and Simulation of Double Capacity Tank Level Contro...

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Chinese control Conference (CCC)

作者： Hui Leng Yue Zhang Hebei Power Generation Process Simulation and Optimization Control Engineering Technology Research Center Baoding China North China Electric Power School of Control and Computer Engineering Beijing

The double-capacity tank liquid level system has the characteristics of inertia, time delay and nonlinearity. Many practical industrial objects can be abstracted as the tank model to describe their working characteristics. Graphical techniques are widely used to assist in representing dynamic system models, while linear graphs represent the internal relationships between components in a system. According to the linear graph modeling theory, this paper takes the double-capacity water tank as the research object, and establishes the mathematical model of the tank liquid level control system. Then simulate the system on this basis, and the transfer function of the system is obtained based on the state space equation, the correctness of the transfer function is verified by the equivalent impedance method. The simulation results show that the modeling of linear graph theory can ensure that the model can better reflect the true characteristics of the system.

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Copula Based Time Delay Estimation for Linear First Order System

Copula Based Time Delay Estimation for Linear First Order Sy...

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2017 International Conference on Applied Mathematics, Modelling and Statistics Application（AMMSA2017）

作者： Xuguang Wang Wei Dong Yan Zhang Hebei Engineering Research Center Simulation & Optimized Control for Power Generation

Time Delay is common and inevitable in the dynamic system. The accuracy of system identification will not be guaranteed if time delay is not accurately estimated or handled properly. Using the theory of dependency measurement, this paper studies the delay identification of SISO system. Firstly, the copula theory is introduced into time delay identification. Secondly, use dependency to measure the relationship of input and output signals and then estimate the time delay with this relationship, Finally, several first order system experiments are used to verify the proposed theory.

关键词： time delay estimation(TDE) first order system copula dependence system identification

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Evaluation Model for Smart Distribution Network Planning under Energy Interconnection

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IOP Conference Series: Earth and Environmental Science 2019年第4期300卷

作者： Yan Zhang Zefu Jiang Jinsen Liu Wenxia Liu Hua Gao Yanmin Wang Power Grid Planning Research Center of Guizhou Power Grid Co. Ltd Guiyang Guizhou 550003 China State Key Laboratory of Power System and Power Generation Equipment Control and Simulation Department of Electrical Engineering Tsinghua University Haidian Beijing 100084 China

Due to the development of the energy interconnection, smart distribution networks (SDNs) should needs be transformed and upgraded to meet new demands. In order to assess the SDN planning, a new index system was conducted from the five attributes. The quantitative methods of all criteria were also defined. An evaluation model was proposed based on AHP weighting and TOPSIS methods. Empirical analysis was performed to verify the feasibility of the evaluation system.

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Near-real-time monitoring of global CO2 emissions reveals the effects of the COVID-19 pandemic (vol 11, 5172, 2020)

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NATURE COMMUNICATIONS 2020年第1期11卷 5172页

作者： Liu, Zhu Ciais, Philippe Deng, Zhu Lei, Ruixue Davis, Steven J. Feng, Sha Zheng, Bo Cui, Duo Dou, Xinyu Zhu, Biqing Guo, Rui Ke, Piyu Sun, Taochun Lu, Chenxi He, Pan Wang, Yuan Yue, Xu Wang, Yilong Lei, Yadong Zhou, Hao Cai, Zhaonan Wu, Yuhui Guo, Runtao Han, Tingxuan Xue, Jinjun Boucher, Olivier Boucher, Eulalie Chevallier, Frederic Tanaka, Katsumasa Wei, Yiming Zhong, Haiwang Kang, Chongqing Zhang, Ning Chen, Bin Xi, Fengming Liu, Miaomiao Breon, Francois-Marie Lu, Yonglong Zhang, Qiang Guan, Dabo Gong, Peng Kammen, Daniel M. He, Kebin Schellnhuber, Hans Joachim Department of Earth System Science Tsinghua University Beijing China. zhuliu@***. Laboratoire des Sciences du Climat et de l'Environnement LSCE CEA CNRS UVSQ Centre d'Etudes Orme de Merisiers Gif-sur-Yvette France. Department of Earth System Science Tsinghua University Beijing China. Department of Meteorology and Atmospheric Science The Pennsylvania State University University Park PA USA. Department of Earth System Science University of California Irvine 3232 Croul Hall Irvine CA USA. Division of Geological and Planetary Sciences California Institute of Technology Pasadena CA USA. Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Collaborative Innovation Center of Atmospheric Environment and Equipment Technology School of Environmental Science and Engineering Nanjing University of Information Science & Technology Nanjing China. Key Laboratory of Land Surface Pattern and Simulation Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing China. Climate Change Research Center Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China. Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China. School of Environment Tsinghua University Beijing China. School of Mathematical School Tsinghua University Beijing China. Department of Mathematical Sciences Tsinghua University Beijing China. Center of Hubei Cooperative Innovation for Emissions Trading System Wuhan China. Institut Pierre-Simon Laplace Sorbonne Université / CNRS Paris France. Université Paris Dauphine Place du Maréchal de Lattre de Tassigny 75016 Paris France. Center for Energy and Environmental Policy Research Beijing Institute of Technology Beijing China. Department of Electrical Engineering the State Key Lab of Control and Simulation of Power Systems and Generation Equipment Institute for National Governance and G

A Correction to this paper has been published: https://***/10.1038/s41467-020-20254-5

关键词： Climate sciences Atmospheric science Environmental sciences Environmental social sciences

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Realization and Application of PSASP-MATLAB Associated Mixed Step simulation based on Engine Calling Mode

Realization and Application of PSASP-MATLAB Associated Mixed...

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2017 International Electrical and Energy Conference (CIEEC 2017)

作者： Yiming ZHANG Qinglai GUO Wenlu ZHAO Tian XIA Haoqing XIONG Ran SUN Henan Electric Power Dispatching and Control Center State Grid Corporation of China(SGCC) State Key Lab of Control and Simulation of Power Systems and Generation Equipment Department of Electrical Engineering Tsinghua University Energy Internet Research Institute Tsinghua University

By calling MATLAB calculation engine function library,associated simulation between power System Analysis Software Package(PSASP) and MATLAB can be realized in parallel and serial *** could use different timing sequence from PSASP,and mixed step simulation can be *** calculation method was used in a 10-nodes power system case for the modeling and simulation of Automatic Voltage Regulator(AVR),and the correctness of the proposed approach is *** this foundation,the electromechanical transient model of Static Var Generator(SVG) was founded with MATLAB/Simulink,and it is of universal applicability and *** inner inverter model can also be used in general grid-connection simulating models of wind power generator,photovoltaic generation,energy storage,***,simulation and analysis for grid-connected wind farm by introducing the SVG model into PSASP were carried out via the proposed associated simulation method above,and the correctness of the model is verified via the calculation *** research results can be used to do assistant analysis for reactive voltage of grid-connected new energy power generation.

关键词： PSASP MATLAB engine static var generator reactive voltage mixed step simulation

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Design of a coal quality detection management system for power plants based on UML

Design of a coal quality detection management system for pow...

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International Conference on Testing and Measurement: Techniques and Applications, TMTA 2015

作者： Liu, Z. Hebei Engineering Research Center of Simulation & Optimized Control for Power Generation North China Electric Power University Baoding China

ISBN: (纸本)9781138028128

The coal quality detection is an integral part of the fuel management, including coal sampling, coal sample preparation, and coal detection three parts. Based on the idea of object-oriented analysis and design, the requirements analysis model for a Coal Quality Detection Management System (CQDMS) is established by using the Unified Modeling Language. Three-level electronic coding based on bar code technology is designed and the statistic model and the dynamic model of the system are visually modeled using UML. Finally, the CQDMS is developed by the *** technology. © 2015 Taylor & Francis Group, London.

关键词： Unified Modeling Language

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