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Simulacijski in eksperimentalni model trinivojskega razsmernika
PRAH, BLAŽ (Author), Vončina, Danjel (Mentor) More about this mentor... This link opens in a new window

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Abstract
V magistrskem delu so obravnavane zgradba, simulacije, delovanje in izdelava aktivnega večnivojskega NPC razsmernika. Najprej je predstavljen pregled razsmerniških naprav, s poudarkom na večnivojskih razsmerniških topologijah. Opisani so tudi različni principi proženja in krmiljenja razsmerniških naprav, kot tudi proženje trinivojskega NPC razsmernika. V osrednjem delu je najprej obravnavana izdelava simulacijskega modela, ki nam je služil kot osnova pri fizični izdelavi naprave. Nato pa sledi obravnava izdelave razsmernika. Prestavljeni so posamezni segmenti vezja, konstrukcijski ukrepi in modifikacije. V nadaljevanju sledi opis krmilnega programa. Tu so predstavljena peklopna stanja tranzistorjev, potek programa in implementacija regulatorja za vzdrževanje konstantne napetosti srednje točke. Za konec so predstavljeni rezultati simulacij, kjer je ovrednoteno delovanje pretvornika za celoten močnostni spekter. Predstavljeni so tudi izkoristki pretvornika pri različnih obratovalnih stanjih, kot tudi rezultati preliminarnih meritev z namenom prikaza delovanja izdelanega pretvornika.

Language:Slovenian
Keywords:večnivojski aktivni NPC razsmernik, proženje MOSFET-ov, DSP, regulacija srednje točke, simulacije v programskem paketu Ansys Simplorer
Work type:Master's thesis/paper (mb22)
Organization:FE - Faculty of Electrical Engineering
Year:2018
Views:716
Downloads:384
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Secondary language

Language:English
Title:Simulation and experimental model of three-level inverter
Abstract:
The master thesis examines structure, simulations, principles of operation, development, and assembly of an active multilevel NPC inverter. Firstly, an overview of voltage converting devices devices is presented, with an emphasis on topologies of multilevel inverters. Different principles of triggering and control of inverters, as well as the triggering of a three-level NPC inverter is described. In the central part, the development of a simulation model was first examined, which served as the basis for the physical construction of the device. Following this, a description of inverter development and assembly is given. Separately are described circuit segments, structural measures, and the post-development modifications. Furthermore, a description of control program is provided. Triggering states of the utilized transistors are presented along with the program flow and implementation of the control algorithm, which is needed for maintaining a constant voltage of the DC link midpoint. Finally, simulation results are presented through performance evaluation, given for the entire power spectrum. Efficiency of the converter is presented at different operating conditions. Furthermore, results of preliminary measurements are provided to demonstrate the operation of the developed converter.

Keywords:multi-level active NPC inverter, MOSFET triggering, DSP, mid-point control, simulations in the Ansys Simplorer software package

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