EMC FILTERING OF THREE-PHASE PWM CONVERTERS MARCELO LOBO HELDWEIN DISSERTATION TO THE ETD ZURICH FOR THE DEGREE OF DOCTOR SCIENCES

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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.
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Instalações Elétricas – 4ª Edição – Ademaro A. M. B. Cotrim PDF

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