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Smart AC grid integrating dispersed small hydropower sources 集成分散小水电的智能交流电网
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602431
R. Magureanu, M. Albu, V. Bostan, A. Dumitrescu, G. Dimu, F. Popa, M. Rotaru
{"title":"Smart AC grid integrating dispersed small hydropower sources","authors":"R. Magureanu, M. Albu, V. Bostan, A. Dumitrescu, G. Dimu, F. Popa, M. Rotaru","doi":"10.1109/OPTIM.2008.4602431","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602431","url":null,"abstract":"The paper presents a variable speed solution for optimal operation of a group of small water turbines integrated in a medium voltage AC grid. As the efficiency of hydro machines is dependent on the water flow, which usually exhibits a large variation, operation at variable speed is considered. Due to the fact that all hydro generators are AC machines, the connection to the 50 Hz power grid can be done using an AC/DC-DC/AC interface. This power electronics-based interface, additional to transferring the energy from the generator to the grid, will also operate as a reactive power and a harmonic voltage compensator. A small AC micro grid was designed, comprising an 45 kW Frances turbo group, an 7 kW diesel synchronous generator, an 1.2 kW Ballard fuel cell, an 1.5 PV solar panel, an 3 kW energy storage acid lead battery and various loads.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130712156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
2-D FEM simulation of an electromagnetic flowmeter 电磁流量计的二维有限元模拟
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602345
M.A. Rodriguez, D. Morinigo, J. Fernandez, R. Cuesta, J. Maroto
{"title":"2-D FEM simulation of an electromagnetic flowmeter","authors":"M.A. Rodriguez, D. Morinigo, J. Fernandez, R. Cuesta, J. Maroto","doi":"10.1109/OPTIM.2008.4602345","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602345","url":null,"abstract":"A computational investigation was carried out in a contactless electromagnetic induction flowmeter to measure the velocity of molten aluminum flowing though a ceramic duct. This paper includes the simulation and the experimental validation using as a reference the electromagnetic induction flowmeter and the experimental test. The results make it possible to demonstrate the reliability of the simulation of the electromagnetic induction flowmeter, using ANSYS. This work provides the process for the simulation of an contacless electromagnetic induction flowmeter to measure the flowrate of molten aluminum in the EPGS (Electromagnetic Pump Green Sand) casting process.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128127616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An optimal selection of induction heater capacitance by genetic algorithm considering dissipation loss caused by ESR 考虑ESR损耗的感应加热器电容的遗传算法优化选择
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602415
E. Daryabeigi, Fathollahi Fard, G. Arab
{"title":"An optimal selection of induction heater capacitance by genetic algorithm considering dissipation loss caused by ESR","authors":"E. Daryabeigi, Fathollahi Fard, G. Arab","doi":"10.1109/OPTIM.2008.4602415","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602415","url":null,"abstract":"In design of a parallel resonant Induction heating system, choosing a proper capacitance for the resonant circuit is quite important. The capacitance affects the resonant frequency, output power, Q-factor, heating efficiency and power factor. In this paper, the role of equivalent series resistance (ESR) in the choice of capacitance is significantly recognized. Optimal value of the induction heating resonance capacitor is achieved by used genetic algorithm under voltage constraint for maximizing the output power of an induction heater, while minimizing the power loss of the capacitor and inverter switching frequency at the same time. Based on the equivalent circuit model of an induction heating system, the output power, and the capacitor losses are calculated. The effectiveness of the proposed method is verified by computer simulations.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134633591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Series hybrid powertrain based on the dual two-level inverter 基于双双电平逆变器的串联混合动力系统
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602421
C. Rossi, G. Grandi, P. Corbelli
{"title":"Series hybrid powertrain based on the dual two-level inverter","authors":"C. Rossi, G. Grandi, P. Corbelli","doi":"10.1109/OPTIM.2008.4602421","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602421","url":null,"abstract":"A multilevel converter in the 'dual two level' configuration is proposed as the core of a hybrid series powertrain. The generation system of the powertrain is constituted by an internal combustion engine (ICE) connected to a three-phase permanent magnet synchronous generator (PMSG). This machine is in the three phase open end winding configuration and is driven by the dual two- level converter. The two dc-link of the multilevel converter supply two motor drives connected to the final mechanical transmission. A new control principle of the generation system is combined to a proper modulation strategy of the dual two- level converter allowing to share the generated power between the two output drives. The power sharing capability of the generation system satisfies the different power demand from the two output drives. This architecture can be applied to road vehicles (i.e. buses, urban light truck) where the two wheels are driven by the two motor drives, and to naval ship propulsion systems (i.c leisure craft, work craft) where two propeller shafts are driven by two motor drives. This powertrain configuration can be easily integrated with a battery energy storage system for pure electric operation of the system.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134474465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
An interpretation of convergence theory for communication systems 通信系统收敛理论的解释
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602481
M.-C. Vulpe, A. Vulpe, F. Sisak, S. Moraru
{"title":"An interpretation of convergence theory for communication systems","authors":"M.-C. Vulpe, A. Vulpe, F. Sisak, S. Moraru","doi":"10.1109/OPTIM.2008.4602481","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602481","url":null,"abstract":"The last fifty years were marked by an impressive evolution of ICT and the convergence theory was not in focus for a long time in this field. The present paper treats the convergence theory in the context of communication systems and tries to forecast the next steps in this area of interest. The paper analyzes the current market status, the business and technological convergence that marked the last years and tries to give a prediction for the future of fixed telephony, mobile telephony, Internet, proposing an unified approach. The paper also proofs that with the current research speed it will be possible soon to have a unified network of interacting machines and humans.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133914193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Stand-alone power system with synchronous and asynchronous generators 具有同步和异步发电机的独立电力系统
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602359
M. Babescu, C. Chioreanu
{"title":"Stand-alone power system with synchronous and asynchronous generators","authors":"M. Babescu, C. Chioreanu","doi":"10.1109/OPTIM.2008.4602359","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602359","url":null,"abstract":"In the Synchronous Generator (SG)+Asynchronous Generator (AG)+Load (L) system there are, for certain load values, one or three working points. In this paper, we present the correct assessment of the working point with a view to building a mathematical model of generators valid both in stationary and transitory regimes. Numerical simulations and modelling of a stand-alone electric power system has large applications today because of wind aggregates operating in isolated energy supply.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113931773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Control methods on unstable periodic orbits of a chaotic dynamical system — control chaos in buck converter 混沌动力系统不稳定周期轨道的控制方法——buck变换器中的混沌控制
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602458
C. Ivan, A. Serbanescu
{"title":"Control methods on unstable periodic orbits of a chaotic dynamical system — control chaos in buck converter","authors":"C. Ivan, A. Serbanescu","doi":"10.1109/OPTIM.2008.4602458","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602458","url":null,"abstract":"Recently, there has been an extensive interest in research on the analysis and control of chaotic behavior in nonlinear systems. Various control problems can be defined for such systems, such as targeting the trajectories to a desired point, stabilizing unstable periodic orbits etc. In this paper we present the necessity and possibility to control chaotic dynamic systems. The first part of this paper describes the methods for the identification of Unstable Periodic Orbits (UPO) of a chaotic dynamic system. Some methods of control are applied to stabilize UPO embedded in the dynamics of the system. The chaos control was first advanced by Ott, Grebogi and York (OGY method). Finally, the resonant parametric perturbation method is applied to control chaos in buck converter. In particular, the effect of phase shift in the perturbing signal is studied.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114002521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Anatase (TiO2) thin layers for solar energy conversion 锐钛矿(TiO2)薄层用于太阳能转换
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602449
A. Duţă, M. Vişa, S. Manolache, M. Nanu
{"title":"Anatase (TiO2) thin layers for solar energy conversion","authors":"A. Duţă, M. Vişa, S. Manolache, M. Nanu","doi":"10.1109/OPTIM.2008.4602449","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602449","url":null,"abstract":"This paper describes the possibilities of obtaining nanostructured TiO<sub>2</sub> using Spray Pyrolysis Deposition and its application in a solid state solar cell (FTO/ TiO<sub>2</sub> In<sub>2</sub>S<sub>3</sub>/ CuSbS<sub>2</sub>/ graphite). Nanostructured TiO<sub>2</sub> films are deposited from ethanolic solution of titanium (IV) isopropoxid, (TTIP, 99.99%, Sigma-AIdrich), and acetilacetonate, (AcAc, 99+%, Aldrich); two parameters are proposed for investigation: the annealing duration in air at 500degC, t<sub>TT</sub> (h), and the number of sprayed sequences, No.<sub>p.c.</sub>. The layers are characterised by XRD, AFM, Raman Spectroscopy, UV-VIS Spectroscopy and the cells by current-voltage measurement in dark and under illumination. It was found that annealing and the spraying time structure can be o a method of tailoring the TiO<sub>2</sub> thin films properties and can influence the photovoltaic response of the cells. The best response was obtained for the cell obtained with TiO<sub>2</sub> thin films deposited with 20 number of sprayed sequences and 6 h of annealing in air at 500degC, for which the open circuit voltage is V<sub>oc</sub> = 210 mV, the short circuit current is I<sub>Ic</sub> = 8.13-10<sup>-2</sup> mA, the values of the maximal power is defined by V<sub>max</sub> = 117 mV and I<sub>max</sub> = 4.64O<sub>2</sub>ldr10<sup>2</sup> mA, corresponding to a fill factor FF = 0.318.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122611927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Performance comparison of GA and DEA in solving distribution system reconfiguration problem 遗传算法与DEA在解决配电系统重构问题中的性能比较
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602364
Saeed Jazebi, S. Hosseinian, M. Pooyan, B. Vahidi
{"title":"Performance comparison of GA and DEA in solving distribution system reconfiguration problem","authors":"Saeed Jazebi, S. Hosseinian, M. Pooyan, B. Vahidi","doi":"10.1109/OPTIM.2008.4602364","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602364","url":null,"abstract":"Distribution network reconfiguration (DNR) is a crucial issue in the operating horizon of distribution systems. In distribution networks tie switches will be changed to obtain an appropriate network configuration with minimum losses. Distribution networks have hundreds of switches and determining the best status of switches is a complicated combinatorial, non-differentiable constrained optimization problem, which can be solved using heuristic optimization algorithms. Many researches have been focused on introducing appropriate search algorithms to this real-time optimization problem. To judge which method is best suited for this particular problem, performance comparison is necessary. In this paper GA and DEA are compared solving reconfiguration problem from convergence rate and computational time point of view.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122862081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Software reliability estimation in the power process management 电源进程管理中的软件可靠性评估
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602487
S. Coman
{"title":"Software reliability estimation in the power process management","authors":"S. Coman","doi":"10.1109/OPTIM.2008.4602487","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602487","url":null,"abstract":"Software reliability is the most important measure of software quality and, naturally, should be customer- oriented. In the current article, a reliability study related to the software exploitation behavior for the remote control of the GVR (gas vacuum recloser) reclosers, using the homogeneous Poisson method, is going to be examined.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123051041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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