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Bi-objective short-term operation model for wind power penetrated system

Bi-objective short-term operation model for wind power penet...

引用

3rd International Conference on Energy and Environmental Protection, ICEEP 2014

作者： Zhang, Hai Feng Zhang, Zhao Jun Zhou, Jun Yang, Yuan Chao School of Mechanical Engineering Shanghai University of Engineering Science Shanghai 201620 China School of Electrical Engineering and Automation Jiangsu Normal University Xuzhou Jiangsu 221116 China AVIC Xi'an Flight Automatic Control Research Institute Xi'an Shaanxi 710065 China

ISBN: (纸本)9783038351344

In view of the uncertainty and intermittency of wind power, this paper presents a bi-objective short-term operation model to manage wind-thermal power systems. This model takes into account both the offer cost and emission. Wind power is regarded as a random variable and is assumed to follow the beta distribution. The bi-objective particle swarm optimization (BOPSO) approach is applied to solve the bi-objective model and Pareto front is obtained. The model and the solution method are tested on a generic system. The validity of the model and the method has been approved. © (2014) Trans Tech Publications, Switzerland.

关键词： Wind power

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Torque Closed-loop Vector control of Induction Motor Based on Stator Flux Observer

Torque Closed-loop Vector Control of Induction Motor Based o...

引用

Conference on Industrial Electronics and Applications

作者： Tao Rui Lei Zhang Cheng Zhou Maosong Zhang Innovative Center of Industrial Energy-saving and Power Quality Control Anhui University Hefei China College of Electrical Engineering and Automation Anhui University Hefei China

ISBN: (纸本)9781479984671

Vector control of Induction Motor (IM) is usually used in speed regulating system. However, in wind power generation system, speed regulator is not needed. On the contrary, there is only a stator current closed-loop in the traditional wind power generation system. The torque set by the turbine controller is controlled indirectly by closed-loop current control. However, the torque control accuracy is low because of the influence of the parameters. Torque closed-loop control can improve the control accuracy, but the feedback torque needs be observed. In this paper, a real-time stator flux observation method based on minimum order flux observer is proposed, based on which the stator flux and torque are calculated. The proposed stator flux observer avoids the flaws of the traditional pure integral strategy, such as saturation, phase shift, amplitude deviation, and so on. Meanwhile, the proposed stator flux observer is robust to parameters, namely, the preciseness of the observed torque is almost not affected by mutual inductance. Experiments of 130KW IM validate the performance of the proposed method.

关键词： stator flux induction motor torque control wind power generation system

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Robust remote tracking control with partly quantized information and packed-dropout 33

Robust remote tracking control with partly quantized informa...

引用

第三十三届中国控制会议

作者： GE Yang WANG Jingcheng LI Kang Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information Processing Ministry of Education of China School of Electronics Electrical Engineering and Computer ScienceQueen’s University Belfast

ISBN: (纸本)9781479947249

This paper mainly discusses the remote tracking problem with partly quantized information and packet-dropout. Since the network exists between the remote plant and the local plant, any information transmitted between each other will experience the quantization errors and may be lost. In this situation, the controller of the local system needs to consider both the exact local information and the inaccurate remote information. A state feedback controller is adopted and the theorems to design such controller are given in terms of bilinear matrix inequalities(BMIs). Moreover, an algorithm is proposed and these BMIs are converted into a convex optimization problem. Finally, the efficiency of the proposed method is demonstrated by a simulation example.

关键词： Networked control systems,robust control,quantized,remote tracking,packet-dropout

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Adaptive Backstepping control of Lightweight Tower Wind Turbine

Adaptive Backstepping Control of Lightweight Tower Wind Turb...

引用

American control Conference

作者： Roberto Galeazzi Kasper T. Borup Henrik Niemann Niels K. Poulsen Fabio Caponetti Automation and Control Group DTU Electrical Engineering Technical University of Denmark Kgs. Lyngby Denmark Centre for Autonomous Marine Operations and Systems Norwegian University of Science and Technology Trondheim Norway Section of Dynamical Systems DTU Compute Technical University of Denmark Kgs. Lyngby Denmark Vestas Wind Systems Aarhus Denmark

ISBN: (纸本)9781479917730

This paper investigates the feasibility of operating a wind turbine with lightweight tower in the full load region exploiting an adaptive nonlinear controller that allows the turbine to dynamically lean against the wind while maintaining nominal power output. The use of lightweight structures for towers and foundations would greatly reduce the construction cost of the wind turbine, however extra features ought be included in the control system architecture to avoid tower collapse. An adaptive backstepping collective pitch controller is proposed for tower point tracking control, i.e. to modify the angular deflection of the tower with respect to the vertical axis in response to variations in wind speed. The controller is shown to guarantee asymptotic tracking of the reference trajectory. The performance of the control system is evaluated through deterministic and stochastic simulations including an extreme wind gust event, and the feasibility of stabilizing the tower position while maintaining the rated power output is shown.

关键词： Poles and towers Wind turbines Rotors Aerodynamics Torque Wind speed Generators

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Robust Fault Tolerant control on Distributed Networked control Systems with Quantized Outputs 33

Robust Fault Tolerant Control on Distributed Networked Contr...

引用

第三十三届中国控制会议

ISBN: (纸本)9781479947249

In this paper, we consider the robust fault tolerant control of the distributed networked control systems(DNCSs). In DNCSs, sub-systems are connected with each other through a communication network. Each sub-system has its own sensor, controller, actuator and quantizer. The output of each sub-system will be transmitted to all other sub-systems through the network. As a result, quantization errors and packet-dropouts cannot be avoided. We also consider the actuator faults situations, including outage, loss of effectiveness and impulse which is modeled by a Markov chain in this paper. A mode-based static output feedback controller is proposed to stable the DNCSs and to meet the robust H-inf performance. Finally, a simulation example is given to illustrate the effectiveness of the proposed method.

关键词： Distributed networked control systems,robust control,fault tolerant,quantized

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A Novel Online Model for Furnace Exit Gas Temperature of Coal-fired Boiler 33

A Novel Online Model for Furnace Exit Gas Temperature of Coa...

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第三十三届中国控制会议

作者： Liu Zhengfeng Wang Jingcheng Shi Yuanhao Zhang Langwen Li Kang Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information ProcessingMinistry of Education of China School of Electronics Electrical Engineering and Computer Science Queen's University Belfast

ISBN: (纸本)9781479947249

Furnace exit gas temperature(FEGT) is the key parameter in the furnace ash fouling monitoring system. Since the standard least squares support vector machine(LSSVM) is not suitable for online identification and control of FEGT,a novel CM-LSSVM-PLS method is proposed to predict FEGT in this paper. In the process of CM-LSSVM-PLS method, c-means cluster(CM) algorithm is used to partition the training data into several different subsets by considering the characteristics of operational data. Submodels are subsequently developed in the individual subsets based on LSSVM method. Partial least squares algorithm(PLS) is employed as the combination strategy. The online updating algorithm is then applied to the CM-LSSVM-PLS model. The proposed online model is verified through operation data of a 300 MW generating unit. The simulation results show that the proposed online updating model is effective for online FEGT forecasting.

关键词： Coal-fired boiler Furnace exit gas temperature C-means cluster Least squares support vector machine Partial least squares Online updating

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A cooperative modeling scheme between power transformer substation and control center 4

A cooperative modeling scheme between power transformer subs...

引用

2014 4th IEEE International Conference on Information Science and Technology, ICIST 2014

作者： Jiaan, Zhang Tao, Xu Wei, Liang Sheng, Xu Lingxu, Guo Zhigang, Huang Guangmin, Fan School of Control Science and Engineering Hebei University of Technology Tianjin300130 China School of Electrical Engineering and Automation Tianjin University Tianjin300072 China Tianjin Electric Power Dispatching and Communication Center Tianjin300010 China

ISBN: (纸本)9781479948086

To meet the requirements for power grid data sharing and model maintenance, this paper proposes a cooperative modeling scheme between transformer substations and the control center. The implementation is based on chartmodel integration in which power grid data and graphics are described interactively. The models cover the standards of the 61850 and 61970. The SCL described substation configurations such as ICD, SCD, SSD and CID files may be derived from the integrated model for intelligent substation assembling. The CIM model and the SVG graphics may be also derived from it. The integrated model is applicable for substation modeling and grid model merging. The scheme facilitates the power grid data sharing and the equipment model maintenance both in the substation and the control center. © 2014 IEEE.

关键词： Electric power transmission networks

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Discussions about cooperative modeling between electricity substation and control center

Discussions about cooperative modeling between electricity s...

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2013 2nd International Conference on Sustainable Energy and Environmental engineering, ICSEEE 2013

作者： Zhang, Jia An Xu, Tao Xu, Sheng Fan, Guang Min Huang, Zhi Gang Guo, Ling Xu Liu, Hai Feng Liu, Ning Meng, Xin Yi School of Control Science and Engineering Hebei University of Technology Tianjin 300130 China School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China Tianjin Electric Power Dispatching and Communication Center Tianjin 300010 China

ISBN: (纸本)9783038350217

Power grid modeling, data maintenance and management in substation and control center are based on IEC61850 standard and IEC61970 standard respectively. The difference between the two standards inevitably affects the data sharing and maintainability of grid models and the operational efficiency of the whole system. The key issues concerning on cooperative modeling, such as power equipment collaborative naming mechanism, mutual mapping between SCL and CIM, constructing complete model for traditional substation, power grid model segmentation and merging are discussed in detail. The analysis shows that collaborative modeling is imperative for power grid to improve efficiency, reduce workload and enhance power system intelligent level in the future. © (2014) Trans Tech Publications, Switzerland.

关键词： Electric power transmission networks

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Evolving fuzzy-model-based on c-regression clustering

Evolving fuzzy-model-based on c-regression clustering

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2014 IEEE Conference on Evolving and Adaptive Intelligent Systems, EAIS 2014

作者： Škrjanc, Igor Dovžan, Dejan Gomide, Fernando Laboratory of Modelling Simulation and Control Faculty of Electrical Engineering University of Ljubljana Tržaška 25 LjubljanaSI-1000 Slovenia Department of Computer Engineering and Automation DCA School of Electrical and Computer Engineering FEEC University of Campinas UNICAMP Av. Albert Einstein 400 Campinas SP13083-852 Brazil

ISBN: (纸本)9781479933471

In this paper a new approach to data stream evolving fuzzy model identification is given. The structure of the model is given in the form of Takagi-Sugeno and the partitioning of the input-output space is obtained using a fuzzy c-regression clustering method and the approach also involves the evolving properties. The method is given in a recursive form. The proposed approach is shown with two simple examples of nonlinear system approximation and nonlinear dynamical system modelling. © 2014 IEEE.

关键词： Nonlinear dynamical systems

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ECG-based detection of left ventricle hypertrophy 2

ECG-based detection of left ventricle hypertrophy

引用

2nd International Congress on Cardiovascular Technologies, CARDIOTECHNIX 2014

作者： Zago, Gabriel Tozatto Andreão, Rodrigo Varejão Filho, Mário Sarcinelli Industrial Automation Department Federal Institut of Espírito Santo Linhares Brazil Electrical Engineering Department Federal Institut of Espírito Santo Vitória Brazil Graduate Program of Electrical Engineering Federal University of Espírito Santo Vitória Brazil

ISBN: (纸本)9789897580550

This works proposes an electrocardiogram based approach for left ventricle hypertrophy (LVH) classification. LVH classification is based on features extracted from the ECG signal, where the main features are the ones related to the QRS wave amplitude and duration. Instead of working on only one LVH criteria, we employed a score which explores the complementarity of the best criteria through a fusion strategy. The best criteria are the ones which discriminate normal and LVH ECGs according to the t-test. We carried out experiments in a database with a group of fifty men, where a half has LVH. The gold standard to detect LVH was the left ventricle mass index measured using echocardiography. Our approach achieved a sensitivity of 69.7%, outperforming all LVH criteria. Copyright © 2014 SCITEPRESS - Science and Technology Publications All rights reserved.

关键词： Electrocardiograms

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