Bibliographies thématiques / Power Quality in DC

Littérature scientifique sur le sujet « Power Quality in DC »

Auteur : Grafiati
Publié le 14 mars 2023

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Articles de revues sur le sujet "Power Quality in DC"

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Barros, Julio, Matilde de Apráiz et Ramón Diego. « Power Quality in DC Distribution Networks ». Energies 12, no 5 (5 mars 2019) : 848. http://dx.doi.org/10.3390/en12050848.

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This paper presents an overview of power quality in low-voltage DC distribution networks. We study which of the power quality disturbances in AC networks are also relevant in DC networks, as well as other disturbances specific to DC networks. The paper reviews the current status of international regulations in this topic and proposes different indices for the detection and characterization of the main types of power quality disturbances, presenting some results obtained in different laboratory tests in DC networks using different DC voltage shapes delivered by different DC power source types.
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Mariscotti, Andrea. « Power quality metrics for DC grids with pulsed power loads ». ACTA IMEKO 10, no 2 (29 juin 2021) : 153. http://dx.doi.org/10.21014/acta_imeko.v10i2.1065.

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<span lang="EN-GB">DC grids can effectively feed pulsed power loads (PPLs), integrating local energy storage to minimize the impact on other connected loads and implementing buffered sub-grids to isolate susceptible loads even more. The identification of regulatory limits for PPL integration and DC grid response and the assessment of PPL impact necessitate suitable Power Quality (PQ) metrics. Existing indexes and limits (e.g. ripple and distortion, voltage fluctuation) are compared to other metrics, derived from control methods and knowledge of the peculiar characteristics of PPL and interaction with DC grids in some examples. The objective is a unified approach for PQ metrics suitable for a wide range of DC grids and in particular to the behavior of PPLs.</span>
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Whaite, Stephen, Brandon Grainger et Alexis Kwasinski. « Power Quality in DC Power Distribution Systems and Microgrids ». Energies 8, no 5 (15 mai 2015) : 4378–99. http://dx.doi.org/10.3390/en8054378.

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Chen, Jun-Hao, Kuang-Hsiung Tan et Yih-Der Lee. « Intelligent Controlled DSTATCOM for Power Quality Enhancement ». Energies 15, no 11 (30 mai 2022) : 4017. http://dx.doi.org/10.3390/en15114017.

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In this study, a three-phase four-wire distribution static compensator (DSTATCOM) is proposed to improve power quality, including the compensation of the three-phase unbalanced grid currents, the total harmonic distortion (THD) reduction of the grid current, and the power factor (PF) correction. Moreover, when different types of loads vary in the power system, the instantaneous power follows into or out of the DC-link capacitor in the DSTATCOM and results in poor transient responses of the grid current and DC-link voltage and performance deterioration. Hence, the DC-link voltage control plays a significant part in the DSTATCOM under load variation. For the purpose of mending the transient responses of the grid currents and DC-link voltage control and the performance of the DSTATCOM, the conventional proportional-integral (PI) controller is substituted with a novel online trained wavelet Takagi-Sugeno-Kang fuzzy neural network (WTSKFNN) controller in this study. Furthermore, the network structure and the online learning method of the proposed WTSKFNN controller are described in detail. Finally, the experimental results are given to certify the feasibility and effectiveness of the DSTATCOM using the proposed WTSKFNN controller for the power quality enhancement and the DC-link control improvement under load variation.
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Vasudevan, K., et M. Balasingh Moses. « Renewable Energy Resources based DC-DC Power Converter for Micro Grid Power Quality Analysis ». Asian Journal of Research in Social Sciences and Humanities 6, no 9 (2016) : 1509. http://dx.doi.org/10.5958/2249-7315.2016.00886.8.

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Singh, Shihka, Bhim Singh, G. Bhuvaneswari et Vashist Bist. « Power Quality Improvement in Bridgeless Ac–Dc Converter Based Multi-output Switched Mode Power Supply ». International Journal of Emerging Electric Power Systems 15, no 6 (1 décembre 2014) : 533–44. http://dx.doi.org/10.1515/ijeeps-2014-0124.

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Abstract Computer power supplies are required to have multiple isolated regulated dc voltages with low ripple content and high input power factor at the utility interface. A dc–dc converter is used for obtaining these isolated multi-output dc voltages with excellent regulation. In this paper, a non-isolated ac–dc converter is proposed as the first stage converter to obtain a regulated dc output rather than using a simple uncontrolled diode bridge rectifier at the front end. A dc–dc converter is used at the second stage that has a high frequency transformer with multiple secondary windings to obtain different dc voltage levels at the output. The proposed bridgeless converter based power supply is designed using fundamental design equations, and different component values are calculated. Extensive simulations are carried out to demonstrate the improved performance of the proposed bridgeless converter based multi-output computer power supply at varying source voltages and load conditions. Experimental validation of the power supply is carried on a developed hardware prototype, and the test results are compared with the simulated performance for design verification.
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Sadikin, Muhammad, Tomonobu Senjyu et Atsushi Yona. « DC–DC Type High-Frequency Link DC for Improved Power Quality of Cascaded Multilevel Inverter ». International Journal of Emerging Electric Power Systems 14, no 4 (28 juin 2013) : 333–40. http://dx.doi.org/10.1515/ijeeps-2012-0007.

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Abstract Multilevel inverters are emerging as a new breed of power converter options for power system applications. Recent advances in power switching devices enabled the suitability of multilevel inverters for high voltage and high power applications because they are connecting several devices in series without the need of component matching. Usually, a transformerless battery energy storage system, based on a cascaded multilevel inverter, is used as a measure for voltage and frequency deviations. System can be reduced in size, weight, and cost of energy storage system. High-frequency link circuit topology is advantageous in realizing compact and light-weight power converters for uninterruptible power supply systems, new energy systems using photovoltaic-cells, fuel-cells and so on. This paper presents a DC–DC type high-frequency link DC (HFLDC) cascaded multilevel inverter. Each converter cell is implemented a control strategy for two H-bridge inverters that are controlled with the same multicarrier pulse width modulation (PWM) technique. The proposed cascaded multilevel inverter generates lower voltage total harmonic distortion (THD) in comparison with conventional cascaded multilevel inverter. Digital simulations are carried out using PSCAD/EMTDC to validate the performance of the proposed cascaded multilevel inverter.
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Bialobrzheskyi, O., I. Reva, S. Yakimets et A. Sulym. « The electrical power quality indicator – interference power factor ». Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no 4 (30 août 2022) : 71–77. http://dx.doi.org/10.33271/nvngu/2022-4/071.

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Purpose. Substantiation of the methodology for calculating an indicator characterizing the pulsating current power distortion. Methodology. When analyzing the power of direct and alternating sinusoidal currents, the features of the ratio of a root-mean-square norm to its mean value, known as the invariance power factor, are noted. In this case, the root-mean-square power value acts as a normalizing parameter. Using a combination of direct and sinusoidal (pulsating) current, the dependences of the invariance power factor on the ratio of direct and alternating components are obtained. Findings. Taking into account the interaction of the current and voltage components of different frequencies, the corresponding power component is highlighted, called interference power. With its use, by analogy with the invariance power factor, the interference power factor is introduced. The interference power factor behavior for AC non-sinusoidal current circuit and DC pulsed current circuit of rectifier was investigated, as a result of which a difference was established in the interference power factor dependence in these circuits. Originality. The obtained dependences of the interfere power factor on the ratio of DC and AC components for current and voltage prove the versatility of its application for assessing power distortion in both DC and AC circuits, as proved by the example of a circuit with a single-phase controlled rectifier. Practical value. The results obtained can be used to assess the electrical power distortion level in electric complexes and systems of various kinds of current and kind of energy, including when it is taken into account. This is a prerequisite for the measures development to improve the electricity quality.
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Abdelkader, Abdallah Ben, Othmane Abdelkhalek, Youssef Mouloudi, Mohamed Amine Hartani et Benabid Slimane. « Series active power filter supplied by fuel cell for mitigating power quality issues ». International Journal of Applied Power Engineering (IJAPE) 9, no 2 (1 août 2020) : 173. http://dx.doi.org/10.11591/ijape.v9.i2.pp173-192.

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<div data-canvas-width="174.49288953839948">In this paper, the combination of the series active power filter (SAPF) with a fuel cell (FC) source is deliberated. The FC based on the SAPF aims to compensate voltage deviations or disturbances that occur in the system caused by power quality issues. The proposed system consists of a fuel cell source connected to the DC l ink through two DC-DC converters, the first extracts the maximum power of the FC source through pulse width modulation (PWM) signals generated from the maximum power point tracker (MPPT) controller. Thus, the second converter is used to regulate the high voltage side of the converter through closed control loops, in addition to a voltage source inverter (VSI) and a series injection transformer. Despite of fluctuations of the DC link during the compensation of the needed energy, MPPT and closed control loops generate PWM signals to the switching devices of DC-DC boost converters in order to extract maximum fuel cell power and to maintain the bus voltage within its limits and around its reference values respectively. The proposed topology is simulated in MATLAB/Simulink software, where simulation results show that the proposed FC based SAPF can efficiently reduce problems of voltage sags-wells and harmonics.</div>
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Wang, Y. J., et C. L. Chen. « Power quality issues in the TRTS DC railway power networks ». European Transactions on Electrical Power 13, no 5 (septembre 2003) : 307–14. http://dx.doi.org/10.1002/etep.4450130506.

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Thèses sur le sujet "Power Quality in DC"

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Ballukja, Erjon. « Power Quality Analysis in DC/DC Converters under Steady State and Transient Conditions ». Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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The modern electric power systems are going through significant changes because of continuous increasing demand of electric power. Further, a growing number of renewable energy systems that directly deliver DC power jointly considered with the advance in DC technology allows a more efficient and affordable use of energy. Furthermore, a rising use of DC systems and microgrids in a wide number of applications has motivated the study of Power Quality (PQ). The concept of power quality in DC systems and microgrids brings many challenges and the aim of this thesis is to understand the delivered power quality in DC microgrid systems. In this thesis, the effects of low frequency range (0-2 kHz) conducted emissions on power quality from a microgrid based DC/DC converter under steady state and transient loading conditions represent the main purpose of this work. Indeed, for a DC distribution network there is a lack of standards and guidelines concerning power quality issues and acceptable levels of conducted disturbances in the aforementioned frequency range. Consequently, the objective of this thesis is to quantify adequate power quality indices for DC systems or networks with connected loads such as Low Frequency Sinusoidal Disturbance (% LFSD) and Amplitude Probability Distribution (APD) indices.
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Farhadi, Mustafa. « Hybrid Energy Storage Implementation in DC and AC Power System for Efficiency, Power Quality and Reliability Improvements ». FIU Digital Commons, 2016. http://digitalcommons.fiu.edu/etd/2471.

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Battery storage devices have been widely utilized for different applications. However, for high power applications, battery storage systems come with several challenges, such as the thermal issue, low power density, low life span and high cost. Compared with batteries, supercapacitors have a lower energy density but their power density is very high, and they offer higher cyclic life and efficiency even during fast charge and discharge processes. In this dissertation, new techniques for the control and energy management of the hybrid battery-supercapacitor storage system are developed to improve the performance of the system in terms of efficiency, power quality and reliability. To evaluate the findings of this dissertation, a laboratory-scale DC microgrid system is designed and implemented. The developed microgrid utilizes a hybrid lead-acid battery and supercapacitor energy storage system and is loaded under various grid conditions. The developed microgrid has also real-time monitoring, control and energy management capabilities. A new control scheme and real-time energy management algorithm for an actively controlled hybrid DC microgrid is developed to reduce the adverse impacts of pulsed power loads. The developed control scheme is an adaptive current-voltage controller that is based on the moving average measurement technique and an adaptive proportional compensator. Unlike conventional energy control methods, the developed controller has the advantages of controlling both current and voltage of the system. This development is experimentally tested and verified. The results show significant improvements achieved in terms of enhancing the system efficiency, reducing the AC grid voltage drop and mitigating frequency fluctuation. Moreover, a novel event-based protection scheme for a multi-terminal DC power system has been developed and evaluated. In this technique, fault identification and classifications are performed based on the current derivative method and employing an artificial inductive line impedance. The developed scheme does not require high speed communication and synchronization and it transfers much less data when compared with the traditional method such as the differential protection approach. Moreover, this scheme utilizes less measurement equipment since only the DC bus data is required.
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Ng, Fan. « Operation and DC-link voltage control of three-phase four-wire unified power quality conditioners ». Thesis, University of Macau, 2007. http://umaclib3.umac.mo/record=b1677859.

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Faktor, Richard. « Kvalita napětí v DC sítích ». Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-316940.

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This diploma thesis deals with elektrical power quality in DC grids. Electrical power is commodity and therefore it must be represented not just with quantitative, but also with qualitative parameters. Nowadays, there is an increasing demand for bigger implementation of renewable energy sources and more efficient power systems, which motivates installation of DC grids. However, development of DC grids is decelerated by lack of standardization alson in power quality. The work includes definition of power quality parameters and their measurement methodology.
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Lam, Chi Seng. « An adaptive low dc-voltage controlled LC coupling hybrid active power filter in three-phase four-wire power systems ». Thesis, University of Macau, 2012. http://umaclib3.umac.mo/record=b2580608.

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Kukacka, Leos. « Qualité de l'énergie dans les alimentations électriques : applications dans les réseaux d'éclairage ». Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30011/document.

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Cette thèse de doctorat porte sur les fluctuations temporelles du flux lumineux des lampes LED, ce phénomène portant le nom de papilottement (flicker). Le papillotement est habituellement considéré comme une perturbation en raison de son impact négatif sur la santé. Pour les systèmes d'éclairage à base de diodes électroluminescentes (LED), sa définition vient d'être formalisée dans la norme IEEE 1789:2015 et a été décrite pour les appareils alimentés en courant alternatif (CA). Ce papillotement alternatif résulte des interactions entre l'impédance du réseau, l'onde de tension, les courants harmoniques et le convertisseur de courant alternatif en courant continu (CA - CC). L'alimentation en courant continu est généralement obtenue via des convertisseurs à découpage. Par conséquent, les mêmes facteurs perturbateurs sont également présents sur les réseaux à courant continu. Cette thèse résume les diférences entre les propriétés caractéristiques du papillotement sous alimentation en CA et en CC. Il a été montré dans la littérature et aussi dans cette thèse qu'avec les LED, le facteur clé qui affecte le papillotement réside dans la conception du driver de LED - une partie indispensable des systèmes d'éclairage à LED. Cette thèse décrit une méthodologie d'évaluation de la sensibilité au papillotement des lampes LED sous alimentation en CC et analyse la façon dont cette sensibilité se modifie lorsque les drivers de LED sont simplifiés et adaptés à des alimentations CC. La thèse présente un ensemble d'expériences de mesure visant à déterminer la réaction typique du papillotement des lampes LED à la fois sous alimentation CA et CC. D'autres expériences ont été efectuées pour révéler l'impact de l'adaptation du driver à l'alimentation CC (en enlevant le pont redresseur à diodes). On constate que certaines lampes présentent une meilleure résistance au papillotement, tandis que d'autres lampes présentent une moindre résistance. Ces expériences sont accompagnées de simulations de drivers pour les lampes LED visant à reproduire et à expliquer les résultats des mesures. La thèse décrit en outre une expérience de mesure visant à montrer la sévérité typique de la variation de tension dans un réseau CC à basse tension couplé au CA domestique et son impact sur le papillotement. On conclut qu'un tel système est suisamment robuste pour filtrer les perturbations provenant du CA, mais une interaction indésirable entre la lampe et l'alimentation peut se produire
This dissertation thesis is concerned with temporal fluctuations of the luminous flux of LED lamps, a phenomenon referred to as flicker. Flicker is usually regarded as a disturbance due to its negative impact on human health. For lighting systems based on light emitting diodes (LED), its definition has recently been formalised in norm IEEE 1789-2015 and has been documented on devices supplied with AC voltage. AC flicker results from interactions between network impedance, voltage and current harmonics, and the AC to DC converter. DC supplies are generally obtained by switching converters. Consequently, the same perturbing factors are present on DC networks. The thesis summarises the differences between the characteristic properties of flicker under AC and DC supplies. It has been shown in the literature and also in this thesis that the key factor affecting flicker with LEDs is the design of the LED driver-a necessary part of the LED lighting systems. This thesis describes a methodology for the evaluation of the flicker sensitivity of DC supplied LED lamps and analyses how the sensitivity changes when the LED drivers are simplified and accustomed to DC supply. The thesis presents a set of measurement experiments aimed to determine the typical flicker response of LED lamps both under AC and DC supply. Further experiments were performed to reveal the impact of accustomising the driver to the DC supply (removing the diode rectifier). It was found that some lamps show better flicker immunity while other lamps show worse flicker immunity. These experiments are accompanied by LED driver simulations aiming to reproduce and explain the measurement results. The thesis further describes a measurement experiment aimed to show the typical severity of the voltage fluctuation in a low voltage DC network coupled to AC mains and its impact on the flicker. It is concluded that such a system is robust enough to filter out any perturbations coming from the AC supply, but an undesired interaction between the lamp and the supply may occur
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Nami, Alireza. « A new multilevel converter configuration for high power and high quality applications ». Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/33216/1/Alireza_Nami_Thesis.pdf.

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The Queensland University of Technology (QUT) allows the presentation of theses for the Degree of Doctor of Philosophy in the format of published or submitted papers, where such papers have been published, accepted or submitted during the period of candidature. This thesis is composed of ten published /submitted papers and book chapters of which nine have been published and one is under review. This project is financially supported by an Australian Research Council (ARC) Discovery Grant with the aim of investigating multilevel topologies for high quality and high power applications, with specific emphasis on renewable energy systems. The rapid evolution of renewable energy within the last several years has resulted in the design of efficient power converters suitable for medium and high-power applications such as wind turbine and photovoltaic (PV) systems. Today, the industrial trend is moving away from heavy and bulky passive components to power converter systems that use more and more semiconductor elements controlled by powerful processor systems. However, it is hard to connect the traditional converters to the high and medium voltage grids, as a single power switch cannot stand at high voltage. For these reasons, a new family of multilevel inverters has appeared as a solution for working with higher voltage levels. Besides this important feature, multilevel converters have the capability to generate stepped waveforms. Consequently, in comparison with conventional two-level inverters, they present lower switching losses, lower voltage stress across loads, lower electromagnetic interference (EMI) and higher quality output waveforms. These properties enable the connection of renewable energy sources directly to the grid without using expensive, bulky, heavy line transformers. Additionally, they minimize the size of the passive filter and increase the durability of electrical devices. However, multilevel converters have only been utilised in very particular applications, mainly due to the structural limitations, high cost and complexity of the multilevel converter system and control. New developments in the fields of power semiconductor switches and processors will favor the multilevel converters for many other fields of application. The main application for the multilevel converter presented in this work is the front-end power converter in renewable energy systems. Diode-clamped and cascade converters are the most common type of multilevel converters widely used in different renewable energy system applications. However, some drawbacks – such as capacitor voltage imbalance, number of components, and complexity of the control system – still exist, and these are investigated in the framework of this thesis. Various simulations using software simulation tools are undertaken and are used to study different cases. The feasibility of the developments is underlined with a series of experimental results. This thesis is divided into two main sections. The first section focuses on solving the capacitor voltage imbalance for a wide range of applications, and on decreasing the complexity of the control strategy on the inverter side. The idea of using sharing switches at the output structure of the DC-DC front-end converters is proposed to balance the series DC link capacitors. A new family of multioutput DC-DC converters is proposed for renewable energy systems connected to the DC link voltage of diode-clamped converters. The main objective of this type of converter is the sharing of the total output voltage into several series voltage levels using sharing switches. This solves the problems associated with capacitor voltage imbalance in diode-clamped multilevel converters. These converters adjust the variable and unregulated DC voltage generated by renewable energy systems (such as PV) to the desirable series multiple voltage levels at the inverter DC side. A multi-output boost (MOB) converter, with one inductor and series output voltage, is presented. This converter is suitable for renewable energy systems based on diode-clamped converters because it boosts the low output voltage and provides the series capacitor at the output side. A simple control strategy using cross voltage control with internal current loop is presented to obtain the desired voltage levels at the output voltage. The proposed topology and control strategy are validated by simulation and hardware results. Using the idea of voltage sharing switches, the circuit structure of different topologies of multi-output DC-DC converters – or multi-output voltage sharing (MOVS) converters – have been proposed. In order to verify the feasibility of this topology and its application, steady state and dynamic analyses have been carried out. Simulation and experiments using the proposed control strategy have verified the mathematical analysis. The second part of this thesis addresses the second problem of multilevel converters: the need to improve their quality with minimum cost and complexity. This is related to utilising asymmetrical multilevel topologies instead of conventional multilevel converters; this can increase the quality of output waveforms with a minimum number of components. It also allows for a reduction in the cost and complexity of systems while maintaining the same output quality, or for an increase in the quality while maintaining the same cost and complexity. Therefore, the asymmetrical configuration for two common types of multilevel converters – diode-clamped and cascade converters – is investigated. Also, as well as addressing the maximisation of the output voltage resolution, some technical issues – such as adjacent switching vectors – should be taken into account in asymmetrical multilevel configurations to keep the total harmonic distortion (THD) and switching losses to a minimum. Thus, the asymmetrical diode-clamped converter is proposed. An appropriate asymmetrical DC link arrangement is presented for four-level diode-clamped converters by keeping adjacent switching vectors. In this way, five-level inverter performance is achieved for the same level of complexity of the four-level inverter. Dealing with the capacitor voltage imbalance problem in asymmetrical diodeclamped converters has inspired the proposal for two different DC-DC topologies with a suitable control strategy. A Triple-Output Boost (TOB) converter and a Boost 3-Output Voltage Sharing (Boost-3OVS) converter connected to the four-level diode-clamped converter are proposed to arrange the proposed asymmetrical DC link for the high modulation indices and unity power factor. Cascade converters have shown their abilities and strengths in medium and high power applications. Using asymmetrical H-bridge inverters, more voltage levels can be generated in output voltage with the same number of components as the symmetrical converters. The concept of cascading multilevel H-bridge cells is used to propose a fifteen-level cascade inverter using a four-level H-bridge symmetrical diode-clamped converter, cascaded with classical two-level Hbridge inverters. A DC voltage ratio of cells is presented to obtain maximum voltage levels on output voltage, with adjacent switching vectors between all possible voltage levels; this can minimize the switching losses. This structure can save five isolated DC sources and twelve switches in comparison to conventional cascade converters with series two-level H bridge inverters. To increase the quality in presented hybrid topology with minimum number of components, a new cascade inverter is verified by cascading an asymmetrical four-level H-bridge diode-clamped inverter. An inverter with nineteen-level performance was achieved. This synthesizes more voltage levels with lower voltage and current THD, rather than using a symmetrical diode-clamped inverter with the same configuration and equivalent number of power components. Two different predictive current control methods for the switching states selection are proposed to minimise either losses or THD of voltage in hybrid converters. High voltage spikes at switching time in experimental results and investigation of a diode-clamped inverter structure raised another problem associated with high-level high voltage multilevel converters. Power switching components with fast switching, combined with hard switched-converters, produce high di/dt during turn off time. Thus, stray inductance of interconnections becomes an important issue and raises overvoltage and EMI issues correlated to the number of components. Planar busbar is a good candidate to reduce interconnection inductance in high power inverters compared with cables. The effect of different transient current loops on busbar physical structure of the high-voltage highlevel diode-clamped converters is highlighted. Design considerations of proper planar busbar are also presented to optimise the overall design of diode-clamped converters.
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Fernandes, Rodolfo Castanho. « Retificador trifásico de 18 pulsos com estágio CC controlado por histerese constante / ». Ilha Solteira : [s.n.], 2010. http://hdl.handle.net/11449/87117.

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Orientador: Falcondes Jose Mendes de Seixas
Banca: Carlos Alberto Canesin
Banca: Luiz Carlos Gomes de Freitas
Resumo: Este trabalho propõe um novo conversor CA-CC trifásico de múltiplos pulsos com estágios CC-CC elevadores de tensão controlados pela técnica de histerese constante. Nesta proposta não são empregados indutores de interfase. A finalidade deste conversor é a de possibilitar um barramento CC regulado para aplicações embarcadas, acionamentos elétricos e afins, sempre com preocupações relacionadas aos aspectos de Qualidade de Energia Elétrica. Assim, a proposta deve apresentar elevado fator de potência, baixa distorção harmônica total de corrente drenada da rede elétrica. Ampla revisão bibliográfica, reunindo as propostas mais recentes da literatura para conversores com mesma finalidade, é feita para que sejam estudadas as estruturas de potência, técnicas de controle, versatilidade, possibilidade de isolamento galvânico e robustez. Em seguida, é detalhada a proposta principal deste trabalho por meio da apresentação do equacionamento do autotransformador, dos estágios elevadores de tensão e da técnica de controle. Esta análise permite que sejam feitas simulações com todos os elementos do conversor CA-CC e então, se desenvolva o projeto físico dos elementos magnéticos e se escolham os componentes eletrônicos do protótipo. O número reduzido de componentes de controle e a simplicidade dos circuitos de potência são grandes atrativos da proposta discutida. Todas as informações relevantes são descritas detalhadamente e, sempre que possível, meios alternativos de solucionar problemas são também apresentados, de forma que fiquem claras as possibilidades de melhoria da técnica empregada. A operação conjunta de todos os elementos mais a técnica de controle foi validada, de maneira que se comprovou, por meio de ensaios, todos os princípios de funcionamento da proposta de conversor CA-CC. Pelos resultados experimentais, obteve-se corrente drenada... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: This work proposes a new AC-DC three-phase multipulse converter with DC-DC boost stages and constant hysteresis control. The objective of this converter is to provide a reliable DC bus for on-board applications, electric motor drives and similars, always considering power quality issues. Thus, the proposal presents high power factor and low harmonic distortions in the currents from the mains. A wide revision is made on other recent proposals found in the scientific literature. Different topologies are compared considering power circuits, control techniques, isolation possibility and robustness. The second chapter presents the details on the main proposal of this work and also the mathematical equations that describe the autotransformer, boost converters and control strategy. Later, simulation results are commented and discussed and the physical design is detailed. The output filter elements, power components and control elements are specified. Experimental results including main waveforms, efficiency, voltage regulation and temperature rise are presented for the autotransformer. The boost stages are also tested and its results are discussed. Finally, the proposed AC-DC converter is tested and the control technique applied to the power stage is validated
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Boulanger, Isabelle. « Lillgrund Wind Farm Modelling and Reactive Power Control ». Thesis, KTH, Elektriska energisystem, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-119256.

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The installation of wind power plant has significantly increased since several years due to the recent necessity of creating renewable and clean energy sources. Before the accomplishment of a wind power project many pre-studies are required in order to verify the possibility of integrating a wind power plant in the electrical network. The creation of models in different software and their simulation can bring the insurance of a secure operation that meets the numerous requirements imposed by the electrical system. Hence, this Master thesis work consists in the creation of a wind turbine model. This model represents the turbines installed at Lillgrund wind farm, the biggest wind power plant in Sweden. The objectives of this project are to first develop an accurate model of the wind turbines installed at Lillgrund wind farm and further to use it in different kinds of simulations. Those simulations test the wind turbine operating according to different control modes. Also, a power quality analysis is carried out studying in particular two power quality phenomena, namely, the response to voltage sags and the harmonic distortion. The model is created in the software PSCAD that enables the dynamic and static simulations of electromagnetic and electromechanical systems. The model of the wind turbine contains the electrical machine, the power electronics (converters), and the controls of the wind turbine. Especially, three different control modes, e.g., voltage control, reactive power control and power factor control, are implemented, tested and compared. The model is tested according to different cases of voltage sag and the study verifies the fault-ride through capability of the turbine. Moreover, a harmonics analysis is done. Eventually the work concludes about two power quality parameters.
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Fernandes, Rodolfo Castanho [UNESP]. « Retificador trifásico de 18 pulsos com estágio CC controlado por histerese constante ». Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/87117.

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Made available in DSpace on 2014-06-11T19:22:32Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-12-03Bitstream added on 2014-06-13T20:29:04Z : No. of bitstreams: 1 fernandes_rc_me_ilha.pdf: 1607084 bytes, checksum: d60bd1d35a36564730a6c9f6b43790ab (MD5)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Este trabalho propõe um novo conversor CA-CC trifásico de múltiplos pulsos com estágios CC-CC elevadores de tensão controlados pela técnica de histerese constante. Nesta proposta não são empregados indutores de interfase. A finalidade deste conversor é a de possibilitar um barramento CC regulado para aplicações embarcadas, acionamentos elétricos e afins, sempre com preocupações relacionadas aos aspectos de Qualidade de Energia Elétrica. Assim, a proposta deve apresentar elevado fator de potência, baixa distorção harmônica total de corrente drenada da rede elétrica. Ampla revisão bibliográfica, reunindo as propostas mais recentes da literatura para conversores com mesma finalidade, é feita para que sejam estudadas as estruturas de potência, técnicas de controle, versatilidade, possibilidade de isolamento galvânico e robustez. Em seguida, é detalhada a proposta principal deste trabalho por meio da apresentação do equacionamento do autotransformador, dos estágios elevadores de tensão e da técnica de controle. Esta análise permite que sejam feitas simulações com todos os elementos do conversor CA-CC e então, se desenvolva o projeto físico dos elementos magnéticos e se escolham os componentes eletrônicos do protótipo. O número reduzido de componentes de controle e a simplicidade dos circuitos de potência são grandes atrativos da proposta discutida. Todas as informações relevantes são descritas detalhadamente e, sempre que possível, meios alternativos de solucionar problemas são também apresentados, de forma que fiquem claras as possibilidades de melhoria da técnica empregada. A operação conjunta de todos os elementos mais a técnica de controle foi validada, de maneira que se comprovou, por meio de ensaios, todos os princípios de funcionamento da proposta de conversor CA-CC. Pelos resultados experimentais, obteve-se corrente drenada...
This work proposes a new AC-DC three-phase multipulse converter with DC-DC boost stages and constant hysteresis control. The objective of this converter is to provide a reliable DC bus for on-board applications, electric motor drives and similars, always considering power quality issues. Thus, the proposal presents high power factor and low harmonic distortions in the currents from the mains. A wide revision is made on other recent proposals found in the scientific literature. Different topologies are compared considering power circuits, control techniques, isolation possibility and robustness. The second chapter presents the details on the main proposal of this work and also the mathematical equations that describe the autotransformer, boost converters and control strategy. Later, simulation results are commented and discussed and the physical design is detailed. The output filter elements, power components and control elements are specified. Experimental results including main waveforms, efficiency, voltage regulation and temperature rise are presented for the autotransformer. The boost stages are also tested and its results are discussed. Finally, the proposed AC-DC converter is tested and the control technique applied to the power stage is validated
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Livres sur le sujet "Power Quality in DC"

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United States. Congress. House. Committee on Resources. Subcommittee on Water and Power Resources. California Central Valley water management : Hearing before the Subcommittee on Water and Power Resources of the Committee on Resources, House of Representatives, One Hundred Sixth Congress, first session, May 20, 1999, Washington, DC. Washington : U.S. G.P.O., 1999.

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United States. Congress. House. Committee on Interior and Insular Affairs. Subcommittee on Water and Power Resources. National Ground Water Contamination Research Act : Hearing before the Subcommittee on Water and Power Resources of the Committee on Interior and Insular Affairs, House of Representatives, One Hundredth Congress, first session on H.R. 791 ... : hearing held in Washington, DC, February 26, 1987. Washington : U.S. G.P.O., 1987.

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Bausière, R. Power electronic converters : DC-DC conversion. Berlin : Springer-Verlag, 1992.

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United States. Congress. House. Committee on Interior and Insular Affairs. Subcommittee on Water and Power Resources. National Ground Water Contamination Research Act : Hearing before the Subcommittee on Water and Power Resources of the Committee on Interior and Insular Affairs, House of Representatives, One Hundredth Congress, first session on H.R. 791 to authorize the water resources research activities of the United States Geological Survey, and for other purposes, hearing held in Washington, DC, February 26, 1987. Washington : U.S. G.P.O., 1987.

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Loveday, George. Designing DC power supplies. Kent : Benchmarks, 1988.

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Kazimierczuk, Marian K. Pulse-width modulated DC-DC power converters. Chechester, West Sussex, United Kingdom : John Wiley & Sons Inc., 2015.

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Kazimierczuk, Marian K. Pulse-Width Modulated DC-DC Power Converters. Chichester, West Sussex : John Wiley & Sons, Ltd., 2008. http://dx.doi.org/10.1002/9780470694640.

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Choi, Byungcho. Pulsewidth Modulated Dc-to-Dc Power Conversion. Hoboken, NJ, USA : John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118772188.

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Kazimierczuk, Marian. Pulse-width modulated DC-DC power converters. Chichester, West Sussex, England : Wiley, 2008.

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Moreno-Muñoz, Antonio, dir. Power Quality. London : Springer London, 2007. http://dx.doi.org/10.1007/978-1-84628-772-5.

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Chapitres de livres sur le sujet "Power Quality in DC"

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A. Elbaset, Adel, et M. S. Hassan. « Small-Signal MATLAB/Simulink Model of DC–DC Buck Converter ». Dans Design and Power Quality Improvement of Photovoltaic Power System, 97–114. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-47464-9_5.

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Anu, A. G., R. Hari Kumar et S. Ushakumari. « Power Quality Enhancement of DC Micro-grid Using DC Electric Spring ». Dans Lecture Notes in Electrical Engineering, 137–48. Singapore : Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-7245-6_12.

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Piquet, Hubert, Nicolas Roux, Babak Nahid-Mobarakeh, Serge Pierfederici, Pierre Magne et Jérôme Faucher. « Quality and Stability of Embedded Power DC Networks ». Dans Systemic Design Methodologies for Electrical Energy Systems, 159–222. Hoboken, NJ, USA : John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118569863.ch5.

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Kumar, L. Ashok, et S. Albert Alexander. « AC–DC Boost Converter Control for Power Quality Mitigation ». Dans Computational Paradigm Techniques for Enhancing Electric Power Quality, 389–400. First edition. | New York, NY : CRC Press/Taylor & Francis Group, 2019. : CRC Press, 2018. http://dx.doi.org/10.1201/9780429442711-10.

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Shringi, Surbhi, Santosh Kumar Sharma et Utkarsh Gupta. « Power Quality Assessment of Solar PV Standalone System Using Various DC-DC Converters ». Dans Algorithms for Intelligent Systems, 139–48. Singapore : Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8820-4_14.

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Manglik, Saurabh, et Anish Garg. « Power Quality Improvement and Performance Enhancement of Permanent Magnet Brush-Less DC Motor ». Dans Lecture Notes in Electrical Engineering, 327–39. Singapore : Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-9008-2_30.

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Balasubramaniam, P. M., et S. U. Prabha. « Performance Comparison of AI Controllers for DC Link Voltage of SAPF System for Power Quality Enhancements ». Dans Lecture Notes in Electrical Engineering, 1385–95. New Delhi : Springer India, 2014. http://dx.doi.org/10.1007/978-81-322-2119-7_135.

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Rajasree, S. R., V. Ravikumar Pandi et K. Ilango. « Power Quality Analysis for Brushless DC Motor Drive Fed by a Photovoltaic System Using SRF Theory ». Dans Lecture Notes in Electrical Engineering, 661–71. Singapore : Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2256-7_60.

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Dokić, Branko L., et Branko Blanuša. « PWM DC/DC Converters ». Dans Power Electronics, 211–309. Cham : Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-09402-1_4.

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Neacşu, Dorin O. « dc/dc Converters ». Dans Automotive Power Systems, 133–58. Boca Raton : CRC Press, 2020. : CRC Press, 2020. http://dx.doi.org/10.1201/9781003053231-8.

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Actes de conférences sur le sujet "Power Quality in DC"

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van Vuuren, Riekert Jansen, et Gerhard Botha. « DC Power Quality Emulator ». Dans 2020 International SAUPEC/RobMech/PRASA Conference. IEEE, 2020. http://dx.doi.org/10.1109/saupec/robmech/prasa48453.2020.9041079.

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Martinez, Wilmar, Shota Kimura, Jun Imaoka, Masayoshi Yamamoto et Camilo A. Cortes. « Volume comparison of DC-DC converters for electric vehicles ». Dans 2015 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA). IEEE, 2015. http://dx.doi.org/10.1109/pepqa.2015.7168204.

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Vinnikov, Dmitri, Indrek Roasto et Tanel Jalakas. « An improved high-power DC/DC Converter for distributed power generation ». Dans 2009 10th International Conference on Electrical Power Quality and Utilisation - (EPQU). IEEE, 2009. http://dx.doi.org/10.1109/epqu.2009.5318863.

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Gomez, Tania, Wendy Hernandez, Wilmar Martinez et Camilo A. Cortes. « Control techniques for interleaved DC/DC converters with magnetic coupling ». Dans 2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA). IEEE, 2017. http://dx.doi.org/10.1109/pepqa.2017.7981676.

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Martinez, Wilmar H., et Camilo A. Cortes. « High power density interleaved DC-DC converter for a high performance electric vehicle ». Dans 2013 Workshop on Power Electronics and Power Quality Applications (PEPQA). IEEE, 2013. http://dx.doi.org/10.1109/pepqa.2013.6614971.

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Giordano, D., D. Signorino, A. Delle Femine, D. Gallo et G. Cipolletta. « Power Quality in DC railway systems ». Dans 2021 IEEE 11th International Workshop on Applied Measurements for Power Systems (AMPS). IEEE, 2021. http://dx.doi.org/10.1109/amps50177.2021.9586027.

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Salazar-Duque, John E., Eduardo I. Ortiz-Rivera et Jesus Gonzalez-Llorente. « Analysis and non-linear control of SEPIC dc-dc converter in photovoltaic systems ». Dans 2015 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA). IEEE, 2015. http://dx.doi.org/10.1109/pepqa.2015.7168243.

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Pica, C., R. Bojoi, G. Griva et A. Tenconi. « Series-connected DC-DC power converters for low-voltage dc source in distributed generation ». Dans 2007 9th International Conference on Electrical Power Quality and Utilisation. IEEE, 2007. http://dx.doi.org/10.1109/epqu.2007.4424173.

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Fernanda, Lopez Arauz Maria, Cruz Dominguez Ghandy Vladimir, Tlapa Juarez Manuel, Bonilla Barranco Hector, Zuniga Torillo Erwin et Quirino Morales Felix. « Comparative analysis of an DC-DC interleaved converter of high power and control techniques ». Dans 2015 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA). IEEE, 2015. http://dx.doi.org/10.1109/pepqa.2015.7168202.

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Ramos, Gustavo A., Miguel E. Hernandez et Manuel D. Trujillo. « Function test by HIL for DC-DC converters type : Buck, boost and buck-boost ». Dans 2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA). IEEE, 2017. http://dx.doi.org/10.1109/pepqa.2017.7981647.

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Rapports d'organisations sur le sujet "Power Quality in DC"

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Shimane, Iwao, et Kosuke Oguri. Development of High Power Density DC-DC Converter for HEV. Warrendale, PA : SAE International, mai 2005. http://dx.doi.org/10.4271/2005-08-0397.

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Ayyanar, Raja, et Enrique Ledezma. Towards a Fully Modular Power System Architecture for DC-DC Converters. Fort Belvoir, VA : Defense Technical Information Center, janvier 2006. http://dx.doi.org/10.21236/ada443437.

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de Lira, A. SPEAR3 INTERMEDIATE DC MAGNET POWER SUPPLIES. Office of Scientific and Technical Information (OSTI), juin 2004. http://dx.doi.org/10.2172/827010.

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de Lira, A. SPEAR3 LARGE DC MAGNET POWER SUPPLIES. Office of Scientific and Technical Information (OSTI), juin 2004. http://dx.doi.org/10.2172/827011.

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de Lira, A. SPEAR3 DC MAGNET POWER SUPPLIES - AN OVERVIEW. Office of Scientific and Technical Information (OSTI), mars 2004. http://dx.doi.org/10.2172/826808.

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Garbesi, Karina, Vagelis Vossos et Hongxia Shen. Catalog of DC Appliances and Power Systems. Office of Scientific and Technical Information (OSTI), octobre 2010. http://dx.doi.org/10.2172/1076790.

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Fang, Chung-Chieh, et Eyad H. Abed. Sampled-Data Modeling and Analysis of the Power Stage of PWM DC-DC Converters. Fort Belvoir, VA : Defense Technical Information Center, janvier 1999. http://dx.doi.org/10.21236/ada438683.

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MacAlpine, S., et C. Deline. Modeling Microinverters and DC Power Optimizers in PVWatts. Office of Scientific and Technical Information (OSTI), février 2015. http://dx.doi.org/10.2172/1171792.

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Northup, R. L., et R. E. Hammond. 2-KW DC Instantaneous Uninterruptible Power Supply Description. Fort Belvoir, VA : Defense Technical Information Center, novembre 1989. http://dx.doi.org/10.21236/ada216765.

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Fang, Chung-Chieh, et Eyad H. Abed. Sampled-Data Modeling and Analysis of PWM DC-DC Converters Part 2. The Power Stage. Fort Belvoir, VA : Defense Technical Information Center, janvier 1998. http://dx.doi.org/10.21236/ada438678.

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