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Mediterranean Conference on control and Automation (MED)

作者： L. Keviczky Cs. Bányász Computer and Automation Research Institute of the H. Ac. of Sc. Control Engineering Research Group of the H. Ac. of Sc. at the Department of Automation and Informatics Budapest University슠of슠Technology슠and슠Economics Budapest Hungary

Using an equivalent transfer function representation (TFR) it is easier to investigate the error properties of state-feedback/observer (SFO) topologies of modern control systems. The TFR is used to explain why an SFO can radically reduce large model errors. Then the same principle is applied together with Youla-parametrization (YP) introducing a new class of regulators.

关键词： Observers Mathematical model Polynomials Computational modeling Topology Transfer functions

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Discrete-time H∞ control of PWM inverters: Experimental results complying with IEC 62040-3

Discrete-time H∞ control of PWM inverters: Experimental res...

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IEEE International Symposium on Circuits and Systems (ISCAS)

作者： S. P. Ribas V. F. Montagner H. Pinheiro R. C. L. F. Oliveira Power Electronics and Control Research Group-GEPOC Federal University of Santa Maria Santa Maria Rio Grande do Sul Brazil School of Electrical and Computer Engineering-FEEC State University of Campinas-UNICAMP Sao Paulo Brazil

This paper aims on the design and experimental validation of a discrete-time H ∞ control for single phase PWM inverters with linear and nonlinear loads, providing results complying with IEC 62040-3 Standard for uninterruptible power supplies. This compliance ensures sinusoidal voltages of high quality for critical loads. The H ∞ control used here is designed by means of linear matrix inequality conditions including constraints on the norm of the control signal, in order to ensure high performance with a feasible action of control, avoiding saturation and high spent of energy from the actuator. Additionally, the controller is implemented in a digital signal processor under constraints as delay in the application of the control signal and limitations on precision and dynamic range of data representation. The control action is a linear combination of the plant states and the states of a controller based on the internal model principle, allowing to track sinusoidal reference signals in the presence of loads with harmonics. The main contribution of the paper is the experimental implementation of this control technique taking into account all the above constraints and producing results complying with IEC 62040-3 Standard.

关键词： IEC standards Harmonic analysis Inverters Pulse width modulation Uninterruptible power systems Power harmonic filters Load modeling

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Guest Editorial

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IEEE Transactions on Industrial Electronics 2011年第4期58卷 1074-1080页

作者： Marco Liserre Josep Balcells Thomas Basso Jan T. Bialasiewicz Carlo Cecati Sudipta Chakraborty Josep M. Guerrero Mehrdad Kazerani Friederich Kupzog Adel Nasiri Peter Palensky José Rodriguez Pedro Rodríguez Thilo Sauter Remus Teodorescu Polytechnic University of Bari Bari Italy Universitat Politéchnica de Catalunya Barcelona Spain National Renewable Energy Laboratory (NREL) Golden CO USA Electrical Engineering Department University of Colorado Denver CO USA Department of Electrical and Information Engineering University of L'Aquila L'Aquila Italy National Renewwable Energy Laboratory (NREL) Golden CO USA Department of Automatic Control Systems and Computer Engineering Technical University of Catalonia Barcelona Spain Department of Electrical and Computer Engineering University of Waterloo Waterloo ON Canada Institue of Computer Technology Vienna Technical University Vienna Austria Department of Electrical Engineering and Computer Science University of Wisconsin Milwaukee WI USA Sustainable Building Technologies Austrian Institue of Technology (AIT) Vienna Austria Department of Electronics Engineering Universidad Técnica Federico Santa María Valparaiso Chile Research Group on Renewable Electrical Energy Systems Department of Electrical Engineering Universitat Politécnica de Catalunya (UPC) Barcelona Spain Austrian Academy of Sciences Institute of Integraded Sensor Systems Wiener Neustadt Austria

The 20 papers in this second part of this special section are classified by energy sources (wind, photovoltaic, hydro, etc.), grid-related issues (islanding, synchronization, microgrid, and smart grid), and converters... 详细信息

关键词： Special issues and sections Smart grids Renewable energy resources Photovoltaic systems Power conversion Wind energy Hydroelectric power generation Power grids

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THD reduction with grid synchronized inverter's power injection of renewable sources

THD reduction with grid synchronized inverter's power inject...

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2010 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM 2010

作者： Gorbe, Peter Magyar, Attila Hangos, Katalin M. Department of Electrical Engineering and Information Systems University of Pannonia 8200 Veszprém Hungary Process Control Research Group Computer and Automation Research Institute 1518 Budapest Hungary

ISBN: (纸本)9781424449873

A control method for small domestic power plants using renewable energy is described in this paper. This method is not only capable of optimizing the working point of the plant but also implements active power factor correction and lowers the extant harmonic distortion in the line. The novel element in the proposed complex controller structure is the upper harmonic controller that minimizes the amplitudes of the 3rd, 5th 7th, 9th, and the 11th upper harmonic component in the output voltage. The proposed controller has been investigated by simulation in Matlab environment, and as a result, substantial improvement of the output voltage and current waveform could be achieved. Robustness of the method against nonlinear loads has also been tested. 0 © 2010 IEEE.

关键词： Solar power generation

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Dynamic modeling and model analysis of a large industrial synchronous generator

Dynamic modeling and model analysis of a large industrial sy...

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作者： Fodor, Attila Magyar, Attila Hangos, Katalin M. Department of Electrical Engineering and Information Systems University of Pannonia 8200 Veszprém Hungary Process Control Research Group Computer and Automation Research Institute HAS Budapest Hungary

ISBN: (纸本)9788070438657

A simple dynamic model of an industrial size synchronous generator operating in a nuclear power plant is developed in this paper based on first engineering principles. The constructed state-space model consists of a nonlinear state equation and a bi-linear output equation. It has been shown that the model is locally asymptotically stable with parameters obtained from the literature for a similar generator. The effect of load disturbances on the partially controlled generator has been analyzed by simulation using a traditional PI controller. It has been found that the controlled system is stable and can follow the set-point changes in the effective power well. The disturbance rejection of the controller is also satisfactory.

关键词： Disturbance rejection

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Mass action realizations of reaction kinetic system models on various time scales

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Journal of Physics: Conference Series 2011年第1期268卷

作者： K M Hangos G Szederkényi Process Control Research Group Computer and Automation Reseach Institute Kende u. 13-17 H-1111 Budapest Hungary Department of Electrical Engineering and Information Systems University of Pannonia Egyetem u. 10 Veszprém Hungary

Complex chemical reaction networks often exhibit different dynamic behaviour on different time scales. A combined approach is proposed in this work for determining physically meaningful mass action realizations of complex chemical reaction networks that describe its dynamic behaviour on different time scales. This is achieved by appropriately reducing the detailed overall mass action kinetic scheme using quasi steady state assumptions fit to the particular time scale, and then searching for an optimal realization using mixed integer linear programing. Furthermore, the relationship between the properties (reversibility, deficiency, stability) of the obtained realizations of the same system on different time scales are also investigated and related to the same properties of the detailed overall model. It is shown that the reduced models obtained by quasi steady state assumptions may show exotic nonlinear behaviour, such as oscillations, when the original detailed is globally asymptotically stable. The proposed methods are illustrated by using a simple Michaelis-Menten type reaction kinetic example. The simplified versions of the well known Brusselator model have also been investigated and presented as a case study.

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Youla-parametrized MIMO controller design for stable multivariable processes

Youla-parametrized MIMO controller design for stable multiva...

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UKACC International Conference on control 2010

作者： Bányász, Cs. Keviczky, L. Computer and Automation Research Institute of the H. Ac. of Sc. Control Engineering Research Group of the H. Ac. of Sc. Budapest Univ. of Technology and Economics Kende u 13-17 H-1111 Budapest Hungary

The Youla-parametrization is a useful method and widely applied to design controllers for open-loop stable single-input-singe-output (SISO) plants. The KB-parametrization is a successful extension of this method for t... 详细信息

ISBN: (纸本)9781846000386

关键词： controllers

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A new variable tap-length LMS algorithm and application in fixed satellite communications

A new variable tap-length LMS algorithm and application in f...

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International Conference on Wireless Communications, Networking and Mobile Computing (WiCom)

作者： Hui, Chen Yanguang, Han Haibin, Li Xinping, Guan Xidian University Xian China 54th Research Institute China Electronics Technology Group Corporation Shijiazhuang China Key Lab. of Industrial Computer Control Engineering Hebei Province Yanshan University Qinhuangdao China

ISBN: (纸本)9781424437092

A new variable tap-length LMS algorithm is proposed in this paper. This algorithm can effectively obtain both fast convergence rate and small steady state error by non-linear weighting L errors of the current moment and past moments. The algorithm analysis is also given which the ideal tap-length is obtained by increasing the error information and eliminating the effect of correlated noise sequences. Then the new algorithm is applied to the fixed satellite communications system in which the channel is affected by weather conditions attenuation and multipath effect. Simulation results are presented to support the analysis. The new algorithm converges faster than usual algorithms under same steady state performance. The signal BER performance is greatly improved with the new adaptive filter algorithm equalizer when the signal passes simulation model of fixed satellite communications system. © 2010 IEEE.

关键词： Satellites

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The application of discrete particle swarm optimization in attitude determination

The application of discrete particle swarm optimization in a...

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2010 WASE International Conference on Information engineering, ICIE 2010

作者： Chang, Chuanwen Mao, Wenshen Mao, Na Gu, Jing No.28 Research Institute China Electronics Technology Group Corporation Nanjing 210007 China School of Computer and Information Hefei University of Technology Hefei 230009 China Engineering Research Center of Safety Critical Industrial Measurement and Control Technology Ministry of Education Hefei 230009 China

ISBN: (纸本)9780769540801

Attitude determination with navigation satellites is a key technology in aviation, marine and land navigation. In the method based on carrier phase difference, the double difference integer ambiguity solving is important and difficult. This paper adopts Discrete Particle Swarm Optimization to search for the optimal integer ambiguity directly without the decorrelation of ambiguity, and calculates the baseline vector consequently. This method can improve the efficiency of integer ambiguity solving, so as to be applied in dynamic attitude determination. The experimental results show the validity of this method. © 2010 IEEE.

关键词： Particle swarm optimization (PSO)

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THD reduction with grid synchronized inverter’s power injection of renewable sources

THD reduction with grid synchronized inverter’s power injec...

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International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM

作者： Péter Görbe Attila Magyar Katalin M. Hangos Department of Electrical Engineering and Information Systems University of Pannonia Veszprém Hungary Process Control Research Group Computer and Automation Research Institute Budapest Hungary

关键词： Power factor correction Costs Power generation Voltage control Harmonic distortion Robustness Nonlinear distortion Solar power generation Power supplies Inverters

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