terça-feira, 4 de novembro de 2014
segunda-feira, 3 de novembro de 2014
Comparison of Simulation using PSIM and SIMULINK in Power Electronics Circuits SAMNANG KUONG
DEPARTMENT OF ELECTRICAL AND COMMUNICATION SYSTEM ENGINEERING GRADUATE SCHOOL OF SOONCHUNHYANG UNIVERSITY
ABSTRACT
This thesis proposed the comparison of both simulation softwares PSIM and MATLAB/SIMULINK, implemented on the power electronics circuits. It will be helpful for designers to decide which software is preferable for the analysis of their power electronics circuits. The circuits that invoked to simulation are AC to DC converters(rectifiers), DC-DC converters, DC-AC converters(inverters), and AC-AC converters. The pure resistances and inductances load are used and input power is supplied by the single-phase and three-phase AC or DC voltage source. The comparison is focusing on the differences of output performances between these two simulation softwares, and the results are considered on the output waveforms of circuit which is drawn and simulated on the schematic window of each software; whether the waveforms in each circuit are matched or not. The process of comparison was accomplished on the same condition of both simulation softwares. The explanations and the features of these comparison is included.
A study on the performance of 10kW Grid-Connected Photovoltaic Power Conditioning System with characteristics variation in inductor core materials Lee, Kyoung-Jun
Grid-Connected power conditioning system (PCS) is widely used for distributed generation system. In Grid-Connected PCS, the LC filter is essential to reduce the current harmonics injected to the grid. In this paper adequate inductor core materials are selected to analyze the performance of 10 kW Grid-Connected Photovoltaic (PV) PCS. Core materials can be classified into three groups: power core, sheet core and ferrite core. For the experiment, Fe-3%Si core, Fe-6.5%Si (Super core) and Mega Flux core were chosen as a filter inductor core. Optimal condition for each inductor core is determined by the efficiency and THD.
Development of A Low Cost Active Power Filter to Suppress Neutral Current Harmonics in Three-Phase Four-Wire System JANG MIN SOO DEPARTAMENT OF CONTROL AND INSTRUMENTATION ENGINEERING SEOUL NATIONAL UNIVERSITY OF TECHNOLOGY
Development of A Low Cost Active Power Filter to Suppress Neutral Current Harmonics in Three-Phase Four-Wire System JANG MIN SOO
DEPARTAMENT OF CONTROL AND INSTRUMENTATION ENGINEERING SEOUL NATIONAL UNIVERSITY OF TECHNOLOGY
Three-phase four-wire electrical distribution systems are widely employed in manufacturing plants, commercial and residential buildings. Due to the nonlinear loads connected to the distribution system, the neutral conductor carries excessive harmonic currents even under balanced loading since the triplen harmonics in phase currents do not cancel each other. This may result in wiring failure of the neutral conductor and overloading of the distribution transformer. This paper proposes a reduced rating active power filter to suppress neutral current harmonics in three-phase four-wire electrical distribution systems. The proposed scheme employs a single-phase inverter connected in series with the neutral conductor and a -Y transformer connected in parallel with the load. The proposed active filter eliminates neutral current harmonics while it does not affect the fundamental current due to unbalanced loading. The VA rating of the inverter is significantly reduced since only fundamental current due to unbalanced loading could flow through the inverter switch. The experimental results on a prototype validate the proposed control approach.
LINK PAPER
https://copy.com/VEbQ8vgFzQ6xAXrG
domingo, 2 de novembro de 2014
sábado, 1 de novembro de 2014
Uninterruptible Power Supplies Josep M. Guerrero Technical University Catalonia Juan C. Vasquez Technical University Catalonia
Uninterruptible Power Supplies
Josep M. Guerrero
Technical University Catalonia
Juan C. Vasquez
Technical University Catalonia
18.1 Introduction Uninterruptible power supply (UPS) systems become more and more important due to the growing critical loads, such as telecommunication systems, computer sets, and hospital equipments. In the last few years, an increasing number of publications about UPS systems research have appeared, and, at the same time, different kinds of industrial UPS units have been introduced in the market. Furthermore, the development of novel energy storage systems, power electronic topologies, fast electrical devices, high-performance digital processors, and other technological advances yield new opportunities for UPS systems [King03, Bekiarov02].
LINK
http://www.mediafire.com/view/p8o9ggq89i552wj/UPS.pdf
Contactless Energy Transfer Marian P. Kazmierkowski Warsaw University of Technology Artur Moradewicz Electrotechnical Institute
Contactless Energy
Transfer
Marian P.Kazmierkowski
Warsaw University of Technology
Artur Moradewicz Electrotechnical Institute
Jorge Duarte Eindhoven University of Technology
Elena Lomonowa Eindhoven Universityof Technology
LINK
http://www.mediafire.com/view/7febbqijwkx80i3/850_pdfsam_Power_Electronics_and_Motor_Drives.pdf
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