检索结果-内蒙古大学图书馆

作者： Hui YAO Hai-rong SUN Yue ZHANG Ya-ting GUO Hebei Technology Innovation Center of Simulation & Optimized Control for Power Generation North China Electric Power University

In order to realize the three-dimensional display of boiler equipment model across the Internet, this paper proposes a lightweight method for the three-dimensional model of boiler equipment: a mesh simplification algorithm based on triangle folding. To make full use of the limited computing power, rendering power and storage space of mobile devices for rapid display and interaction of three-dimensional models, and realize the Internet publishing of models. The design scheme of intelligent control platform for boiler maintenance and maintenance based on model lightweight is put forward.

关键词： Model lightweight Triangular folding Boiler equipment Maintenance

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Quantitative Evaluation Method of Turbine Virtual Maintenance Based on Improved AHP

Quantitative Evaluation Method of Turbine Virtual Maintenanc...

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作者： Ya-ting GUO Ze DONG Chang-qing LI Hui YAO Hebei Technology Innovation Center of Simulation & Optimized Control for Power Generation North China Electric Power University

In order to evaluate the training process of steam turbine virtual maintenance for personnel training more reasonably, a quantitative evaluation method of turbine virtual maintenance based on improved analytic hierarchy process(AHP) is proposed in this paper. This paper establishes a set of evaluation index system and gives the quantitative algorithm of the corresponding index according to the characteristics of virtual maintenance of steam turbine equipment. The traditional AHP is also improved without consistency checking, which avoids the blindness of artificial adjustment of the judgment matrix and makes it easier and faster to get the weight value of the index. Under the balanced consideration of all evaluation factors, the evaluation of operators is completed, and the results of the comprehensive evaluation are more objective and credible. This method has been applied to a virtual maintenance training and assessment platform of steam turbine in thermal power plant, and the validity of the method has been verified.

关键词： Improved AHP Virtual maintenance Steam turbine Quantitative evaluation

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NO_x emission model for coal-fired boilers using partial least squares and extreme learning machine

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Journal of Southeast University(English Edition) 2019年第2期35卷 179-184页

作者： Dong Ze Ma Ning Li Changqing Hebei Engineering Research Center of Simulation and Optimized Control for Power Generation North China Electric Power UniversityBaoding 071003China School of Control and Computer Engineering North China Electric Power UniversityBeijing 102206China

To implement a real-time reduction in NOx,a rapid and accurate model is required.A PLS-ELM model based on the combination of partial least squares(PLS)and the extreme learning machine(ELM)for the establishment of the NOx emission model of utility boilers is ***,the initial input variables of the NOx emission model are determined according to the mechanism ***,the initial input data is extracted by ***,the extracted information is used as the input of the ELM model.A large amount of real data was obtained from the distributed control system(DCS)historical database of a 1 000 MW power plant boiler to train and validate the PLS-ELM *** modeling performance of the PLS-ELM was compared with that of the back propagation(BP)neural network,support vector machine(SVM)and ELM *** mean relative errors(MRE)of the PLS-ELM model were 1.58%for the training dataset and 1.69%for the testing *** prediction precision of the PLS-ELM model is higher than those of the BP,SVM and ELM *** consumption time of the PLS-ELM model is also shorter than that of the BP,SVM and ELM models.

关键词： NOx emission partial least squares extreme learning machine coal-fired boiler

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Application of Virtual Reality technology in the Maintenance of Steam Turbine

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Journal of Physics: Conference Series 2021年第1期1966卷

作者： Zijie Pan Hairong Sun Li Li School of Control and Computer Engineering North China Electric Power University Baoding 071000 China Hebei Engineering Research Center of Simulation Optimized Control for Power Generation North China Electric Power University Baoding 071003 China

Traditional steam turbine maintenance work has many shortcomings, such as poor effectiveness, high cost, and long cycle. In order to solve this problem and improve the professional skills and maintenance efficiency of steam turbine maintenance personnel, we first collect steam turbine equipment drawings and 3D dimension data of parts, and use 3D modeling software to establish augmented reality scene model. Then combined with the virtual reality technology and image fusion technology to realize the maintenance procedure training and maintenance auxiliary guidance of the steam turbine unit. The practical application results show that this technology can realize the virtual and real operation of the model by users in augmented reality scenes, bring interactive and immersive experience to operators, and improve the work efficiency of maintenance personnel.

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Study on Fuzzy control of Circulating Fluidized Bed Temperature 3

Study on Fuzzy Control of Circulating Fluidized Bed Temperat...

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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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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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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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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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