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Dissertations / Theses on the topic 'Harmonic Inverter'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Sirisukprasert, Siriroj. "Optimized Harmonic Stepped-Waveform for Multilevel Inverter." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/35333.

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The concept of multilevel voltage source inverters and their modulation topologies are described. The concept of the Optimized Harmonic Stepped-Waveform (OHSW) technique for a multilevel inverter is presented. By applying this concept, specific harmonics can be eliminated, and the output voltage THD can be improved. A procedure to achieve the appropriate switching angles of the OHSW is proposed. Experimental results are presented to verify the concept. The proposed OHSW technique is implemented on a multilevel inverter using cascaded-inverter with separated dc sources. Comparison between the S

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2

Yang, Yang. "Harmonic Losses in Windings of Inverter-Fed High-Speed PM Motors." Thesis, KTH, Elektrisk energiomvandling, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-179193.

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This master thesis focuses on the estimation of losses in windings of a high-speed PermanentMagnet (PM) motor. The PM motor studied in this thesis is applied to a nut-runner systemwith specic characteristics such as operating at a high speed (30000 rpm), relatively smallsize and being slot-less. Previously published analytical models for calculation the losses inwindings are discussed in the literature study along with related background theory. Finiteelement method (FEM) 2D is applied in the simulations using FLUX v12. Simulations beginwith several conductors and bundles. Meanwhile, the analy

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3

Du, Yang. "Modeling and analysis of single-phase two-stage inverter for grid-connected photovoltaic application." Thesis, The University of Sydney, 2013. http://hdl.handle.net/2123/9334.

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In order to extract the maximum amount of power from the PV modules and convert it into an appropriate form for grid integration, a power electronics interface is needed. This thesis focuses on analysis and modeling of the single-phase two-stage inverter for grid-connected PV application with special attention given to the harmonic issues. A DC/DC battery-integrated boost converter can serve as the front end in a two-stage PV inverter configuration. A steady-state analysis for this new type of converter is carried out. An application of this converter in distributed Maximum Power Point Trackin

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4

Al, Shammeri Bashar Mohammed Flayyih. "A novel induction heating system using multilevel neutral point clamped inverter." Thesis, University of Plymouth, 2017. http://hdl.handle.net/10026.1/8305.

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This thesis investigates a novel DC/AC resonant inverter of Induction Heating (IH) system presenting a Multilevel Neutral Point Clamped (MNPCI) topology, as a new part of power supply design. The main function of the prototype is to provide a maximum and steady state power transfer from converter to the resonant load tank, by achieving zero current switching (ZCS) with selecting the best design of load tank topology, and utilizing the advantage aspects of both the Voltage Fed Inverter (VFI) and Current Fed Inverter (CFI) kinds, therefore it can considered as a hybrid-inverter (HVCFI) category

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5

Uesugi, Y., T. Imai, K. Kawada, and S. Takamura. "Fundamental and Third Harmonic Operation of SIT Inverter and its Application to RF Thermal Plasma Generation." IEEE, 2002. http://hdl.handle.net/2237/7175.

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6

Knezevic, Aleksa. "Real-time power system impedance estimation for DG applications: Using PV-inverter based harmonic injection method." Master's thesis, University of Cape Town, 2017. http://hdl.handle.net/11427/25325.

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On-line power system (PS) Thévenin equivalent impedance (TEI) estimation involves the reduction of the PS's complex circuit into a simple form that provides valuable insight into its state and behaviour. It finds application in numerous areas such as voltage stability monitoring and islanding detection. In the context of distributed generation (DG), on-line TEI estimation can be easily implemented in existing hardware to add functionality and improve the operation of power converters – the key components of DG systems. Two distinct methods of on-line PS TEI estimation exist. The passive method

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7

John, Malte [Verfasser]. "Frequency-domain modeling of harmonic interactions in pulse-width modulated voltage-source inverter drives / Malte John." Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2019. http://d-nb.info/1183907060/34.

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8

Uesugi, Y., T. Imai, K. Kawada, and S. Takamura. "3RD HARMONIC OPERATION OF SIT INVERTER RF SOURCE FOR ICRF HEATING IN THE DIVERTOR PLASMA SIMULATOR NAGDIS-Ⅱ." IEEE, 2001. http://hdl.handle.net/2237/7170.

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9

Chaing, Chia-Tsung. "Five-level inverter employing WRPWM switching scheme." Diss., University of Pretoria, 2005. http://upetd.up.ac.za/thesis/available/etd-07102008-081413/.

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10

Häger, Emil. "Performance Evaluation of Medium-Power Voltage Inverters." Thesis, Linköpings universitet, Elektroniska Kretsar och System, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-118568.

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Power inverters, used to convert DC power to AC, are often used in e.g. solar power applications. However, they tend to be impractically large and expensive; as such, power miniaturization is an active research area. In this thesis, several classes of modern power inverters are evaluated and compared with regards to size, efficiency and output quality in order to identify areas of potential improvement. Methods for estimation of THD, power losses and input ripple are created and verified against a simulation of a five-level neutral-point-clamped inverter with SPWM control. Finally, this design

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11

Ingram, David. "An Evaluation of Harmonic Isolation Techniques for Three Phase Active Filtering." Thesis, University of Canterbury. Electrical and Computer Engineering, 1998. http://hdl.handle.net/10092/1260.

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Recent advances in power electronics have lead to the wide spread adoption of advanced power supplies and energy efficient devices. This has lead to increased levels of harmonic currents in power systems, degrading the performance of electrical machinery and interfering with telecommunication services. Active filters provide a solution to these problems by compensating for the distorted currents drawn by non-linear loads. Optimal methods for controlling these active filters have been determined by computer simulation and experimental implementation. Methods used for isolating the harmonic cont

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12

Arman, Mahmoud Fayez. "An 'active' passive-filter topology for low power DC/AC inverters." Thesis, Brunel University, 2011. http://bura.brunel.ac.uk/handle/2438/6072.

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This thesis presents a new output passive filter for voltage source inverter applications which is based on a shunt connected single tuned filter topology. The proposed circuit has the advantage of tracing harmonic components wherever its location in the frequency spectrum. The change in the harmonic location might be as a result of a change in the inverter operating frequency. Also, the proposed filter achieves harmonic reduction close to the traditional single tuned passive filter. In order to show the superiority of the proposed model, a comparison is introduced with other self tuning harmo

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13

Senturk, Osman Selcuk. "Series Active Filter Design, Control, And Implementation With A Novel Load Voltage Harmonic Extraction Method." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608819/index.pdf.

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Series Active Filters (SAF) are designed for harmonic isolation and load voltage regulation of single-phase and three-phase voltage harmonic source type nonlinear loads. The novel Absolute Value Method (AVM) for load voltage harmonic extraction is proposed and applied in the control algorithm of SAF. The SAF compensated systems are represented by simplified linear models such that SAF controller gains can be easily determined. Harmonic isolation and load voltage regulation performances of 2.5 kW single-phase and 10 kW three-phase SAF compensated systems are evaluated by detailed simulations. L

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14

Fernández, Palomeque Efrén Esteban. "Optimization of a CSI inverter and DC/DC elevator with silicon carbide devices, for applications in electric traction systems." Doctoral thesis, Universitat Politècnica de Catalunya, 2019. http://hdl.handle.net/10803/666485.

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The applications of electric traction systems currently focus on developing technologies with greater energy efficiency and lower environmental impact. Manufacturers of hybrid and electric vehicles are looking for ways to improve and optimize the efficiency of their models. Manufacturers are looking for more efficient and more compact converter topologies. The use of new band gap materials in the construction of these topologies has generated many debates and new lines of research especially in the optimization of these topologies. The silicon carbide (SiC) based switching devices provide sig

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15

Deib, Deib Ali. "Programmed harmonic reduction in inverters and controlled rectifiers." Ohio : Ohio University, 1993. http://www.ohiolink.edu/etd/view.cgi?ohiou1173759592.

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16

Narayanan, G. "Synchronised Pulsewidth Modulation Strategies Based On Space Vector Approach For Induction Motor Drives." Thesis, Indian Institute of Science, 1999. https://etd.iisc.ac.in/handle/2005/139.

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In high power induction motor drives, the switching frequency of the inverter is quite low due to the high losses in the power devices. Real-time PWM strategies, which result in reduced harmonic distortion under low switching frequencies and have maximum possible DC bus utilisation, are developed for such drives in the present work. The space vector approach is taken up for the generation of synchronised PWM waveforms with 3-Phase Symmetry, Half Wave Symmetry and Quarter Wave Symmetry, required for high-power drives. Rules for synchronisation and the waveform symmetries are brought out. Th

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Narayanan, G. "Synchronised Pulsewidth Modulation Strategies Based On Space Vector Approach For Induction Motor Drives." Thesis, Indian Institute of Science, 1999. http://hdl.handle.net/2005/139.

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In high power induction motor drives, the switching frequency of the inverter is quite low due to the high losses in the power devices. Real-time PWM strategies, which result in reduced harmonic distortion under low switching frequencies and have maximum possible DC bus utilisation, are developed for such drives in the present work. The space vector approach is taken up for the generation of synchronised PWM waveforms with 3-Phase Symmetry, Half Wave Symmetry and Quarter Wave Symmetry, required for high-power drives. Rules for synchronisation and the waveform symmetries are brought out. Thes

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18

Buchta, Luděk. "Kompenzace nelinearit při řízení střídavých pohonů." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2019. http://www.nusl.cz/ntk/nusl-408028.

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Analysis of the dead-time effect and other nonlinearities of the voltage source inverter was carried out in the introduction of the doctoral thesis. Three compensation strategies for vector controlled PMSM were proposed based on the analysis. The voltage disturbance observer with cost function of current errors is based on the model of PMSM, known machine parameters and easily measurable quantities. The second observer which estimates the dq- axes currents and the value of the voltage error with one parameter only is designed based on the harmonic analysis and Kalman filter algorithm. The thir

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19

Rutkovskiy, Yaroslav. "A Novel Control Method for Grid Side Inverters Under Generalized Unbalanced Operating Conditions." Cleveland State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=csu1610646102417883.

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20

Zelený, Miroslav. "Provoz distribučních sítí s odporovými svářečkami." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219391.

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This Diploma thesis deals with assessment of the influence of two fundamental types of resistance welders operation on chosen power quality parameters at the point of common coupling (PCC) of the power network. The assessed parameters of power quality are the total harmonic distortion of the supply voltage, asymmetry of the supply voltage and the level of short term flicker at the point of common coupling. The assessment is based on the comparison of the results of computer simulations done in PSCad 4.2.0 with the requirements of technical standards. The outcome of this thesis is the determina

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21

Sahoo, Smrutirekha. "Impact Study: Photo-voltaic Distributed Generation on Power System." Thesis, Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-32369.

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The grid-connected photo-voltaic (PV) system is one of the most promising renewable energy solutions which offers many benefits to both the end user and the utility network and thus it has gained the popularity over the last few decades. However, due to the very nature of its invariability and weather dependencies, the large scale integration of this type of distributed generation has created challenges for the network operator while maintaining the quality of the power supply and also for reliable and safe operations of the grids. In this study, the behavioral impact of large scale PV system

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22

Downing, Ross M. "History and Application of Dualism and Inverse Harmony." Kent State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=kent1588259522335479.

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23

Teeters, Bradley W. "Variable frequency control of voltage source inverters using harmonic distortion minimization scheme." Ohio : Ohio University, 1999. http://www.ohiolink.edu/etd/view.cgi?ohiou1175285333.

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24

Kumar, Rajiv. "Programmed harmonic reduction in single phase and three phase voltage-source inverters." Ohio : Ohio University, 1996. http://www.ohiolink.edu/etd/view.cgi?ohiou1178302407.

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25

Ahmadi, Khatir Damoun. "A Universal Selective Harmonics Elimination Method for High Power Inverters." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1339611032.

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26

Salimin, Suriana. "Low order harmonics mitigation in grid connected, parallel PV inverters." Thesis, University of Newcastle upon Tyne, 2014. http://hdl.handle.net/10443/2670.

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This research is concerned with the problem of network power quality when grid connected systems are used to feed the network distribution grid. A parallel connection of photovoltaic (PV) system is the main interest of study for this research. This type of PV system uses power electronic components such as inverter and current controller that produce harmonics which adversely affect the power quality of the distribution network. Development and simulation of current controller using the proportional resonance (PR) scheme is considered to overcome the harmonic problems in single and parallel PV

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27

Platz, Daniel. "Reconstructing force from harmonic motion." Doctoral thesis, KTH, Nanostrukturfysik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-122583.

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High-quality factor oscillators are often used in measurements of verysmall force since they exhibit an enhanced sensitivity in the narrow frequencyband around resonance. Forces containing frequencies outside this frequencyband are often not detectable and the total force acting on the oscillatorremains unknown. In this thesis we present methods to eciently use theavailable bandwidth around resonance to reconstruct the force from partialspectral information.We apply the methods to dynamic atomic force microscopy (AFM) wherea tip at the end of a small micro-cantilever oscillates close to a samp

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28

Albanna, Ahmad. "HARMONIC MODELING AND SIMULATION OF NON-LINEAR PWM INVERTERS IN DISTRIBUTED GENERATION SYSTEMS." OpenSIUC, 2010. https://opensiuc.lib.siu.edu/dissertations/243.

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The research presented in this dissertation primarily focuses on providing analytical frequency-domain equations that use the system and controller parameters to accurately characterize the power conversion harmonics resulting from the deployment of hysteresis current-controlled inverters within the ac network. In addition, the ac and dc harmonic interactions under both ideal system conditions (constant dc excitation and pure sinusoidal ac voltages) and non-ideal system conditions (harmonic terms are added to the dc and ac sources) are derived for the fixed- and variable-band hysteresis curren

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29

Akhtar, Nahid. "A multiscale harmonic spline interpolation method for the inverse spheroidal gravimetric problem." Aachen Shaker, 2009. http://d-nb.info/1000335380/04.

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30

Goh, Hong Soo. "The effect of grid operating conditions on the harmonic performance of grid-connected PV inverters." Thesis, University of Newcastle Upon Tyne, 2012. http://hdl.handle.net/10443/1369.

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Solar energy is a readily available alternative energy source that can be utilised to help reduce carbon emission; typically created by traditional, yet depleting, fossil fuel sources such as coal, gas and oil. For this reason, there has been a rapid increase in the installation and development of grid-connected Photovoltaic (PV) systems. Typically, grid-connected PV systems require a power electronic inverter to interface with the distribution grid. This thesis is concerned with the power quality interactions which arise between the distribution grid and the connected inverter. In particular,

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31

Ayhan, Ufuk. "Investigation Of Dc Bus Current Harmonics In Two And Three Level Three-phase Inverters." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614182/index.pdf.

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Within scope of this work, double-fourier analysis method of rapid calculation and detailed simulation method, which are used to investigate DC bus current harmonics in two level and three level three-phase inverters systematically, will be emphasized and two methods will be compared via applying different modulation techniques. In addition, DC bus currents will be investigated visually for various working conditions and modulation methods. After that, analysis methods will be applied and harmonic spectrums will be determined. After all, it will be showed that calculated harmonic spectrums cou

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32

Ponomarev, Dmitry. "Quelques problèmes inverses avec des données partielles." Thesis, Nice, 2016. http://www.theses.fr/2016NICE4027/document.

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La thèse se compose de 3 parties. Dans la partie I, nous considérons des problèmes à lafrontière pour une EDP de Laplace dans un domaine simplement connexe de bordLispschitz continu. Depuis des données Dirichlet et Neumann suffisamment régulièresdisponibles sur une partie de la frontière, nous développons une méthode non-itérative derésolution de ce problème de Cauchy, régularisé par une contrainte en norm L2 portantsur la solution sur la partie complémentaire du bord. Notre approche par les fonctionsanalytiques de la variable complexe permet d'imposer des contraintes ponctuellessupplémentaire

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33

Akhtar, Nahid [Verfasser]. "A Multiscale Harmonic Spline Interpolation Method for the Inverse Spheroidal Gravimetric Problem / Nahid Akhtar." Aachen : Shaker, 2010. http://d-nb.info/1124365478/34.

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34

Baniulis, Mantas. "Dažnio keitiklių generuojamų į tinklą aukštesniųjų srovės harmonikų tyrimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20120528_131457-87823.

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Darbe analizuojamos dažnio keitiklio į tinklą generuojamos aukštesniosios eilės harmonikos. Atlikti nagrinėjamo dažnio keitiklio tuščiosios veikos ir apkrovos bandymai, bei išmatuotos generuojamos į tinklą aukštesniosios eilės srovės harmonikos. Nustatyta netiesinių iškreipių faktoriaus priklausomybė nuo maitinimo įtampos dažnio ir apkrovos. Taip pat atliktas vieno iš tinklo taršos slopinimo įrenginių – linijinio droselio bandymas. Nustatyta, kad netiesinių iškreipių faktorius, priklausomai nuo apkrovos kito nuo 30 % iki 80 %, dirbant 50 Hz dažniu. Didinant maitinimo įtampos dažnį, netiesinių

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35

Roeber, Jochen Erich. "Influence of higher time harmonics on the electrical and mechanical performance of an inverter-fed squirrel cage induction motor." Master's thesis, University of Cape Town, 1991. http://hdl.handle.net/11427/19507.

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Due to the ruggedness, reliability and low maintenance required, small inverter-fed induction motors (1.5 kW to 25 kW) have earned a reputation and are utilized more and more frequently in industry for variable speed applications. The applied voltage and current waveforms are generally quite non-sinusoidal and polluted with higher time harmonic components. The higher time harmonics affect the electrical and mechanical performance significantly, and adverse effects are investigated. Literature on the effect of higher time harmonics is reviewed. Recommendations referring to various aspects under

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36

Etesami, Mohammadhossein. "On metaheuristics for design and modulation of multilevel inverters." Thesis, Queensland University of Technology, 2019. https://eprints.qut.edu.au/132309/1/Mohammadhossein%20Etesami%20Thesis_Redacted.pdf.

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Multilevel inverters are introduced as a promising technology for high voltage applications. Associated design limits and control complexities hinder the wide use of multilevel converters. Motor drive overall efficiency is largely affected by the applied modulation technique. Selective Harmonic Elimination (SHE) Pulse Width Modulation (PWM) is a modulation technique which gives an excellent outcome suppressing low-order detrimental harmonics. Solving of the associated highly nonlinear equation set in SHE PWM has been one of the widely discussed numerical problems in power electronics. Three ke

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Bin, Mohd Rozlan Mohd Helmy Hakimie. "DC/AC inverter based switched capacitor circuit topology with reduced number of components for low power applications." Thesis, Brunel University, 2017. http://bura.brunel.ac.uk/handle/2438/16009.

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This thesis presents a new DC/AC inverter circuit which is based on a switched-capacitor circuit topology with reduced components (power switch and capacitor) count for low power applications. The proposed circuit has distinct features of both voltage boost-up and near sinusoidal (multi-level/staircase) AC output voltage. The main idea is to utilise a simple circuit technique called resonant-based Double Switch Single Capacitor Switched-Capacitor (DSSC SCC) with variable duty cycle Pulse Width Modulation (PWM) control technique in such a way that multi-level voltage can be realised across a ca

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Campanhol, Leonardo Bruno Garcia. "Filtro ativo de potência paralelo utilizando inversores monofásicos full-bridge aplicado em sistemas trifásicos a quatro-fios." Universidade Tecnológica Federal do Paraná, 2012. http://repositorio.utfpr.edu.br/jspui/handle/1/774.

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CAPES<br>Este trabalho apresenta o estudo, projeto e implementação digital usando DSP de um Filtro Ativo de Potência Paralelo (FAPP) trifásico com potência de 4,5kVA, sendo este implementado utilizando três topologias de inversores monofásicos em ponte completa compartilhando o mesmo barramento de tensão CC. O FAPP é utilizado em sistemas trifásicos a quatro-fios para supressão de harmônicos de corrente, compensação de reativos e compensação de desbalanços das correntes de carga. Dentre as características mais relevantes desta topolgia de FAPP, pode-se citar: possibilidade de controle de corre

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Joca, Davi Rabelo. "TÃcnica de ModulaÃÃo para ReduÃÃo de DHT em Inversor MultinÃvel com Capacitor Flutuante de TrÃs NÃveis." Universidade Federal do CearÃ, 2014. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=11222.

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CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior<br>Diante da necessidade em aperfeiÃoar as tecnologias existentes para a conversÃo de energia elÃtrica em sistemas de alta potÃncia, este trabalho tem por finalidade projetar, analisar e implementar experimentalmente uma tÃcnica de modulaÃÃo com o intuito de reduzir o conteÃdo harmÃnico da tensÃo de saÃda em um inversor multinÃvel com capacitor flutuante de trÃs nÃveis. Algumas das diversas tÃcnicas de modulaÃÃo (PSPWM, LSPWM, HE-PWM e CSV-PWM) foram analisadas e implementadas no controlador digital FPGA a fim de comparar suas caracte

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40

Zachlin, Paul Francis. "On the Field of Values of the Inverse of a Matrix." Case Western Reserve University School of Graduate Studies / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=case1181231690.

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Pothuraju, Maneesha. "A Study on the Electromagnetic and Mechanical Vibrations of a Dynamometer Using Spectral Analysis." University of Cincinnati / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1613747909641685.

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42

Sandberg, Henrik. "Linear Time-Varying Systems: Modeling and Reduction." Licentiate thesis, Lund University, Department of Automatic Control, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-74720.

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Linear time-invariant models are widely used in the control community. They often serve as approximations of nonlinear systems. For control purposes linear approximations are often good enough since feedback control systems are inherently robust to model errors. In this thesis some of the possibilities for linear time-varying modeling are studied. In the thesis it is shown that the balanced truncation procedure can be applied to reduce the order of linear time-varying systems. Many of the attractive properties of balanced truncation for time-invariant systems can be generalized into the time-v

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Acordi, Edson Junior. "Estudo e implementação de um filtro ativo de potência paralelo aplicado em sistemas trifásicos a quatro fios com controle e modulação vetorial." Universidade Tecnológica Federal do Paraná, 2012. http://repositorio.utfpr.edu.br/jspui/handle/1/775.

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O presente trabalho realiza o estudo e implementação de um filtro ativo de potência paralelo (FAPP) aplicado em sistemas trifásicos a quatro fios utilizando a topologia de um inversor de tensão four-legs, visando a redução do conteúdo harmônico gerado por cargas não lineares e a compensação de reativos. A geração das correntes de referência de compensação é obtida através da estratégia de compensação baseada no sistema de eixos de referência síncrona (SRF) a qual utiliza conceitos de controle vetorial. O sincronismo do sistema SRF é realizado através de um circuito q-PLL (q-Phase Locked Loop)

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Yan, Shuai [Verfasser], and Christoph [Akademischer Betreuer] Pflaum. "Numerical Analysis and Application of Time-harmonic Inverse Iterative Method on Simulation of Plasmonic Effects in Silver Nanowire Films / Shuai Yan. Gutachter: Christoph Pflaum." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2014. http://d-nb.info/1075741998/34.

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Nelson, Joel A. "EFFECTS OF CLOUD-INDUCED PHOTOVOLTAIC POWER TRANSIENTS ON POWER SYSTEM PROTECTION." DigitalCommons@CalPoly, 2010. https://digitalcommons.calpoly.edu/theses/430.

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As the world strives towards finding alternative sources of power generation, photovoltaic generation has become an increasingly prevalent alternative energy source on power systems world-wide. This paper studies the effects that incorporating photovoltaic generation has on the existing power systems and their power system protection schemes. Along with the addition of this emerging alternative energy source comes the volatility of PV power generation as cloud-cover produces erratic variations in solar irradiance and PV power production. Such variations in PV power may lead to unfavorable oper

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Souza, Wallace Gabriel de. "Estudo de um inversor fotovoltaico para controle e compensação de reativos e harmônicos." Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/154529.

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Submitted by Wallace Gabriel de Souza (wgs.gabriel@hotmail.com) on 2018-07-16T16:35:11Z No. of bitstreams: 1 dissertacao_wgs.pdf: 3537876 bytes, checksum: 56fef2d280007dba43983b71988d997b (MD5)<br>Approved for entry into archive by Maria Marlene Zaniboni null (zaniboni@bauru.unesp.br) on 2018-07-17T13:07:06Z (GMT) No. of bitstreams: 1 souza_wg_me_bauru.pdf: 3537876 bytes, checksum: 56fef2d280007dba43983b71988d997b (MD5)<br>Made available in DSpace on 2018-07-17T13:07:06Z (GMT). No. of bitstreams: 1 souza_wg_me_bauru.pdf: 3537876 bytes, checksum: 56fef2d280007dba43983b71988d997b (MD5) Pr

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Gerkens, Rick, and David Berg. "Elkvalitéproblem vid varvtalsstyrd motordrift i industrimiljö." Thesis, KTH, Data- och elektroteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-122892.

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Övertoner orsakade av varvtalsstyrda motordrifter ger problem i industrisystem. Syftet med studien är att identifiera problemen och ge rekommendationer för att undvika dem. Studien utfördes som examensjobb på KTH för konsultföretaget Ramböll. En litteraturstudie i ämnet kombinerades med elkvalitémätningar på drifter hos Sandvik Mining. Elkvalitéproblem orsakade av varvtalsstyrda motordrifter kommer till stor del av att frekvensstyrningen ger olinjärt strömuttag som, om nätet inte är tillräckligt starkt, påverkar spänningskvalitén. Problemen kan vara driftstopp, störd utrustning och ökat slitag

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Henn, Gustavo Alves de Lima. "TÃcnica de ModulaÃÃo Aplicada Ãs Estruturas de Inversores MultinÃveis com Neutro Grampeado e Capacitor Flutuante Para ReduÃÃo de Perdas e DistorÃÃo HarmÃnica." Universidade Federal do CearÃ, 2012. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=8095.

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CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior<br>Visando superar os desafios inerentes Ã conversÃo de energia elÃtrica em sistemas de alta potÃncia, minimizando as perdas e melhorando a qualidade da energia processada, este tra-balho tem por objetivo analisar e implementar uma tÃcnica de modulaÃÃo para ser aplicada nas duas topologias de inversores multinÃveis mais disseminadas - com neutro grampeado (NPC), e com capacitor flutuante (FC) - a fim de reduzir os esforÃos nos semicondutores, bem como melhorar o Ãndice de distorÃÃo harmÃnica da tensÃo de saÃda. Ao longo do trabalho fo

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Fischer, Pierre. "Nouvelles approches de tomographies hydrauliques en aquifère hétérogène : théories et applications en milieu karstique et fracturé." Thesis, Normandie, 2018. http://www.theses.fr/2018NORMR059/document.

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Ce manuscrit de thèse présente une nouvelle approche pour caractériser qualitativement et quantitativement la localisation et les propriétés des structures dans un aquifère fracturé et karstique à l’échelle décamétrique. Cette approche est basée sur une tomographie hydraulique menée à partir de réponses à une investigation de pompages et interprétée avec des méthodes d’inversions adaptées à la complexité des systèmes karstiques. L’approche est appliquée sur un site karstique d’étude expérimental en France, une première fois avec des signaux de pompage constants, et une deuxième fois avec des s

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Monteiro, Júnior Alcy. "Modelagem da usina fotovoltaica do estádio do Mineirão para estudos de propagação harmônica." Universidade Federal de Minas Gerais, 2014. http://hdl.handle.net/11612/464.

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Este trabalho apresenta um estudo de medições e simulações de fluxo harmônico na Usina Solar Fotovoltaica do Estádio Mineirão em Belo Horizonte/MG. O objetivo foi verificar o comportamento dos inversores solares fotovoltaicos na geração de harmônicos e a atenuação ocorrida pela agregação de múltiplos inversores. Para isso, foram realizadas medições em seis pontos estratégicos da usina investigada, por meio de analisadores de qualidade de energia, o que possibilitou a verificação do comportamento da usina em horários distintos e condições climáticas diversas. Foi avaliada a injeção de harmônico

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