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Статті в журналах з теми "Onduleur Multi-Niveaux"
Benabderrahman, Hossam Eddine, Rachid Taleb, M'hamed Helaimi, and Fayçal Chabni. "Commande par mode glissant d’ordre deux d’un moteur asynchrone lié à un convertisseur multi-niveau asymétrique." Journal of Renewable Energies 21, no. 2 (June 30, 2018): 267–78. http://dx.doi.org/10.54966/jreen.v21i2.687.
Повний текст джерелаTaleb, Rachid, Taieb Bessaad, Adil Yahdou, Fayçal Mehedi, and Abdelkader Belboula. "Apport des techniques neuromimétiques à la commande d'un onduleur asymétrique à onze niveaux Application à l'alimentation d'une MASDE." Journal of Renewable Energies 21, no. 4 (December 31, 2018): 661–74. http://dx.doi.org/10.54966/jreen.v21i4.719.
Повний текст джерелаBessaad, Taieb, Rachid Taleb, Abdelkader Belboula, Fayçal Chabni, and Hacene Mellah. "Commande par gradins d'un convertisseur multiniveau asymétrique à structure cascade pour l'entraînement d'une machine asynchrone." Journal of Renewable Energies 22, no. 1 (October 6, 2023): 93–101. http://dx.doi.org/10.54966/jreen.v22i1.729.
Повний текст джерелаДисертації з теми "Onduleur Multi-Niveaux"
Karania, Nabil. "Contrôle du Compensateur Actif Parallèle à Génération Photovoltaïque pour les Réseaux Intelligents." Electronic Thesis or Diss., CY Cergy Paris Université, 2024. http://www.theses.fr/2024CYUN1288.
Повний текст джерелаIn the electrical distribution networks and smart grids, the widespread adoption of power electronics components among customer loads poses diverse challenges to power quality. The integration of renewable energy sources further exacerbates these challenges due to voltage fluctuations, frequency deviations, and waveform distortion inherent in these sources, significantly dependent on weather conditions. This thesis addresses these challenges through three distinct solutions for power quality improvement in distribution networks, focusing on integrating renewable energy sources, particularly photovoltaic (PV) systems, in the third solution.The first solution introduces a developed multi-level structure of an AC/DC/AC Converter. This solution aims to regulate voltage amplitude, ensure sinusoidal-like output stepping voltage, and mitigate a wide range of harmonics, including the predominant harmonics affecting sensitive loads such as asynchronous motor drives. To address these aspects, this work develops a novel modulation technique to control the DC/AC part of the converter, configured via an Asymmetrical Cascaded H-Bridge Inverter.The second solution involves an Advanced Hybrid Control System Developed for Shunt Active Filter Based on a Multi-Level Inverter. This solution improves the performance of the shunt active filter, raises its apparent switching frequency, and reduces the size of its output coupling filter. The hybrid controller, implemented using Petri Nets (PNs), ensures high-performance tracking of the compensating current, in addition to stabilizing, controlling, and balancing the DC voltages across the MLI inputs. The practical stability of the DC voltage errors is analytically proved via the Lyapunov theorem. This solution is explored in detail for n H-Bridge modules per phase, with real measurement and simulation validations evaluated for 2 and 3 H-Bridge modules per phase within a real industrial environment to prove the structure's effectiveness.The third solution presents a Grid-Connected PV Structure Incorporated with a Shunt Active Filter Based on a Multi-Level Inverter. This configuration enhances power quality and provides renewable energy for both loads and the grid. The DC inputs of the multi-level inverter are connected directly to PV subsystems or via DC-DC converters. Linear controllers are employed to establish the control strategy for the shunt active filter based on (n) H-bridge modules, including injecting compensating current, maximizing the produced power of the PV system, and regulating DC voltages across capacitors. Multi-carrier PWM modulation ensures balanced power distribution among the modules. Maximum Power Point Tracking (MPPT) algorithms, such as Perturb & Observe (P&O), with three control strategies including Proportional Integral, Duty-cycle, and Model Predictive Controller, are employed to maximize PV subsystem power generation. Additionally, the DC-DC converter utilizes PWM modulation techniques across all three control strategies to maintain a consistent switching frequency.The performance of the three aforementioned solutions is validated, for finite HB modules, within a textile factory suffering from harmonic impact on the main textile machine, which represents a sensitive load of 50 kVA, driven by an asynchronous motor. This motor drive is highly sensitive to predominant torque and voltage harmonics, requiring appropriate control of the fundamental output voltage amplitude and the phase and amplitude of the harmonic voltage components. This control system is particularly designed to regulate motor speed variation and mitigate undesired fluctuations caused by harmonic torques. To ensure reliable results, on-site measurements using power quality analyzer devices are collected to create a numerical model of the entire factory's network. Finally, the performance of each solution is investigated on the sensitive load operating within this textile factory
Bouarfa, Abdelkader. "Méthodes de commande par allocation de convertisseurs statiques polyphasés, multi-niveaux : de la modélisation à la mise en oeuvre temps-réel." Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30261/document.
Повний текст джерелаIn our works, we are interested in control of high-switch-count power converters. The development of multileg, multilevel converters has opened the access to high power and high harmonic quality. The special control of these devices brings to the converter advanced abilities that are more and more requested nowadays, like active harmonic filtering, fault tolerance, active and reactive power transfer, High Voltage Direct Current (HVDC) links, etc. However, a higher number of switches in a conversion structure leads to a higher number of control variables, as well as more redundancies and a combinatorial explosion of the number of possible configurations. The development of control laws resulting from approaches traditionally designed for classical topologies, as for space vector modulation methods, becomes harder for new, much complex topologies. Moreover, the too many available switches bring strong control redundancies that are not necessarily exploited, at least arbitrarily. We propose a new control approach that is expected to be less dependent on the number of switches, and that does not suffer from limitations proper to geometrical modulation methods. Firstly, our approach consists in the algebraic formulation of control problems that are generally under-determined, highlighting the presence of redundancies and degrees of freedom, and constrained, because control limitations are taken into account. Interestingly, a connection can be highlighted to the so-called control allocation problem in flight control, robotics, or marine applications. Secondly, in order to compute a unique and optimized control solution at each switching period, we develop new control allocation methods for power converters based on on-line numerical optimization using linear programming techniques. Consequently, duty cycles are automatically optimized to satisfy voltage references while respecting saturations and exploiting available redundancies depending on the state of the converter. We highlight the properties naturally offered by our methods. In particular, all modulation solutions yield a maximized extension of the linearity range of the converter. We propose control allocation methods for the voltage or current control of many topologies: the four-leg two-level inverter, the multicellular flying capacitor inverter, the modular multilevel inverter
Khair, Allah Mohannad. "Etude d'une nouvelle modélisation et d'une nouvelle topologie d'onduleur triphasé multi niveaux à commutations pré calculées : application aux énergies renouvelables." Versailles-St Quentin en Yvelines, 2008. http://www.theses.fr/2008VERS0014.
Повний текст джерелаThis work presents a novel switching angles and voltage levels determination method to cancel harmonics in the output of a three phased inverter. The objective is to optimize the number of successive cancelled harmonics for a given number of switching actions and of voltage levels. After the modelization, the voltage levels and the switching angles are drawn by solving a non linear equation system using the simplex method. Then a set of succeded rank harmonics are cancelled. This approach allows to reduce the THD rate and to increase the fundamental amplitude of the voltage in the inverter output. The number of cancelled harmonics depends on the number of voltage levels voltages and the number of switching angles. To reduce the number of power switches, we have proposed a new topology. All the results were validated by simulation and experimentally. The experimental validation has been done by using our new topology multilevel inverter, a dPACE card controlled by Matlab Simulink
Vidales, Luna Benjamin. "Architecture de convertisseur intégrant une détection de défauts d'arcs électriques appliquée au sources d'énergie continues d'origine photovoltaïques." Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0040.
Повний текст джерелаIn this research work, the development of a multilevel inverter for PV applications is presented. The PV inverter, has two stages one DC/DC converter and one DC/AC inverter, and is capable of generating an AC multilevel output of nine levels, it's a transformerless inverter and uses a reduced number of components compared to other topologies. The conception of a novel DC/DC converter is capable of generating two isolated DC voltage levels needed to feed the DC/AC stage. This DC/DC stage is developed in two variants, buck and boost, the _rst to perform the reduction of voltage when the DC bus is too high, and second to increase the voltage when the DC bus is too low to perform interconnection with the grid through the DC/AC inverter. This is achieved thanks to the parallel functioning of the developed topology, which make use of moderated duty cycles, that reduces the stress in the passive and switching components, reducing potential losses. The validation of the PV inverter is performed in simulation and experimental scenarios. In the other hand, the response of the inverter facing an arc fault in the DC bus is studied by performing a series of tests where the fault is generated in strategic points of the DC side, this is possible thanks to the design and construction of an arc fault generator based in the specifications of the UL1699B norm. During the tests is observed that with the apparition of an arc fault, there is a lost in the half-wave symmetry of the AC multilevel output voltage waveform, generating even harmonics which aren't present during normal operation, only when an arc fault is present in the DC system. The monitoring of even harmonics set the direction for developing the detection technique. Since the magnitude of even harmonics in the inverter is very low, the total even harmonic distortion is employed as a base for the detection technique presented in this thesis. The effectiveness of this method is verified with a series of tests performed with different loads
Berhail, Abdelkader. "Commande d'une éolienne à base de GSAP connectée au réseau électrique par convertisseur multiniveaux." Thèse, 2020. http://depot-e.uqtr.ca/id/eprint/9562/1/eprint9562.pdf.
Повний текст джерелаКниги з теми "Onduleur Multi-Niveaux"
Bentouba, Said. Optimisation d’un Système Photovoltaïque en Couche Mince: Intégration d'un Onduleur Multi Niveaux et Comparaison entre MPPT. Omniscriptum, 2014.
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