Bibliografie tematiche / Multilevel Inverter Photovoltaic (PV) systems

Letteratura scientifica selezionata sul tema "Multilevel Inverter Photovoltaic (PV) systems"

Autore: Grafiati

Pubblicato: 8 giugno 2024

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Articoli di riviste sul tema "Multilevel Inverter Photovoltaic (PV) systems":

Memon, Abdul Jabbar, Mukhtiar Ahmed Mahar, Abdul Sattar Larik e Muhammad Mujtaba Shaikh. "A Comprehensive Review of Reduced Device Count Multilevel Inverters for PV Systems". Energies 16, n. 15 (26 luglio 2023): 5638. http://dx.doi.org/10.3390/en16155638.

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This article presents a comprehensive review of reduced device count multilevel inverter (RDC MLI) topologies for PV systems. Multilevel inverters are widely used in medium-voltage and high-power applications such as wireless power transform applications, flexible AC transmission (FACT), active filters, AC motor drives, high-voltage DC transmission (HVDC), and renewable energy sources due to their high modularity and high-power quality output. Multilevel inverters have the ability to diminish the harmonics content in the output voltage by applying various modulation techniques. The literature in this field showed that the high-power quality and high modularity of the output demand an undeniable need for multilevel inverter topology. Research in this field has identified various multilevel inverter topologies, each possessing their own merits and demerits. The ubiquitous availability of multilevel inverter topologies illustrates the complexity of their accurate selection. To avoid such complexity, this review shows the state of the art of various reduced device count (RDC) multilevel inverter (MLI) topologies. Details of the various RDC MLIs, along with their comparisons, are provided in this paper. This review will be an important reference tool for future work on RDC MLI for photovoltaic (PV) systems.

Ahmad, Marwan E., Ali H. Numan e Dhari Y. Mahmood. "Enhancing performance of grid-connected photovoltaic systems based on three-phase five-level cascaded inverter". International Journal of Power Electronics and Drive Systems (IJPEDS) 12, n. 4 (1 dicembre 2021): 2295. http://dx.doi.org/10.11591/ijpeds.v12.i4.pp2295-2304.

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<span lang="EN-US">Multilevel inverters play an important role in power converters due to their good advantages. The cascaded H-bridge inverter is one of the most prominent and most suitable multilevel inverters in PV systems. Each H-bridge has a separate photovoltaic (PV) array as an independent direct current (DC) source. This paper introduces a three-phase cascaded H-bridge inverter with five levels connected to the grid to improve the performance and efficiency of the photovoltaic system. In the proposed system, each PV group has MPPT to extract the maximum power point from the PV group at certain irradiation and temperature and also to mitigate the mismatch that causes in the imbalance transmitted power from inverter to the main grid. The proposed control scheme with modulation compensation was used, and the system was simulated in MATLAB/Simulink with two different scenarios. The simulation results demonstrate the effectiveness of the proposed connection in minimizing the total harmonic distortion (THD) to acceptable limit, low overshoot, and fast-tracking to the desired value.</span>

Bughneda, Ali, Mohamed Salem, Anna Richelli, Dahaman Ishak e Salah Alatai. "Review of Multilevel Inverters for PV Energy System Applications". Energies 14, n. 6 (12 marzo 2021): 1585. http://dx.doi.org/10.3390/en14061585.

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Over the last decade, energy demand from the power grid has increased significantly due to the increasing number of users and the emergence of high-power industries. This has led to a significant increase in global emissions with conventional energy generation. Therefore, the penetration of renewable energy resources into the power grid has increased significantly. Photovoltaic systems have become the most popular resources as their protentional is enormous, thus, the worldwide installed PV capacity has increased to more than 635 gigawatts (GW), covering approximately 2% of the global electricity demand. Power electronics are an essential part of photovoltaic generation; the drive for efficient power electronic converters is gaining more and more momentum. Presently, multilevel inverters (MLI) have become more attractive to researchers compared to two-level inverters due to their abilities to provide lower electromagnetic interference, higher efficiency, and larger DC link voltages. This paper reviews multilevel inverters based on their classifications, development, and challenges with practical recommendations in utilizing them in renewable energy systems. Moreover, PV systems with various maximum power point tracking (MPPT) methods have been extensively considered in this paper as well. The importance and the development of a modified multilevel inverter are also highlighted in this review. In general, this paper focuses on utilizing multilevel inverters for PV systems to motivate and guide society to focus on inventing an efficient and economical multilevel inverter that has the combined capabilities of these converters reported in the literature.

Sathish Kumar, S., R. Ramkumar, S. Sivarajeswari, D. Ramya, T. Subburaj e Martin Sankoh. "Performance Enhancement of a Three Phase Boost-Cascaded Fifteen Level Inverter Using the PI Controller". Mathematical Problems in Engineering 2022 (19 maggio 2022): 1–17. http://dx.doi.org/10.1155/2022/3888571.

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Photovoltaic power generation is a potential alternative energy source that offers several benefits over other alternative energy sources such as wind, sun, ocean, biomass, geothermal, and so on. Multilevel inverters are essential for power conversion in solar power generation. These multilevel inverters employ three distinct topologies: diode-clamped (neutral-point clamped) inverter, capacitor-clamped (flying capacitor) inverter, and cascaded H-bridge multilevel inverter. The cascaded H-bridge multilevel inverter is more appropriate for photovoltaic applications than the other two topologies. The proposed system asymmetrical cascaded multilevel inverter (ACMLI) is energized using a photovoltaic system (PV). A three-phase cascaded H-bridge fifteen-level inverter for grid-connected solar systems is given in this study utilizing a proportional integral controller. The harmonic distortion was removed using a multicarrier pulse width modulation method. The MATLAB/Simulink is used to simulate the performance of a three-phase cascaded H-bridge fifteen-level inverter in terms of harmonic content and number of switches. To test the performance of the designed system, a hardware prototype was created. From the obtained results, the proposed method reduces the switch count, harmonic distortion, and rejects the external disturbances of input and output variables.

Kiruba Samuel, C. S., e K. Ramani. "Performance Analysis of Seven Level Multilevel Inverter Using Renewable Energy Systems". Asian Journal of Electrical Sciences 1, n. 2 (5 novembre 2012): 15–22. http://dx.doi.org/10.51983/ajes-2012.1.2.1682.

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With the increasing concerns on energy issues, the development of renewable energy sources is becoming more and more attractive. A new kind of wind-PV hybrid generated system that comprises of wind and photovoltaic generation subsystems as input to a cascaded H-bridge multilevel inverter is developed in this paper. In conventional methods the inverter with solar and wind energy sources are used. In this method a seven level multilevel inverter with wind–PV hybrid generation system as input are proposed for application to remote and isolated areas. The wind and the solar light are captured in greatest degree, as well as the multilevel inverter using pulse width modulation technique is adopted. The objectives of this hybrid system are, to satisfy the load power demand and, presence of high number of output levels in inverter to maintain the dc output voltage level of the inverter to produce a nearly sinusoidal output. This reduces harmonics in inverter output voltage. This paper discusses about the control of seven-level H-bridge cascaded multilevel inverter with Fast Fourier Transform analysis in inverter output voltage through simulation. The simulated wind-PV system consists of an AC-to-DC boost converter, aDC-to-AC nverter, a photovoltaic module, and wind module. Its shown by the simulations that a multilevel inverter utilizing renewable resource has lower Total Harmonics Distortion in output voltage. In this paper comparison of conventional inverter and proposed seven level cascaded H-bridge multilevel inverter using solar and wind energy sources are presented.

Tiwari, Pawan Kumar, e Mrs Madhu Upadhyay. "Converter Topologies and Optimization Control in PV Systems for on Grid Load Applications Study". SMART MOVES JOURNAL IJOSCIENCE 6, n. 9 (29 settembre 2020): 6–10. http://dx.doi.org/10.24113/ijoscience.v6i9.321.

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Renewable energy sources around the world, especially solar energy, are increasing dramatically in the face of energy shortages and environmental concerns. The cascade multistage converter structure can be fascinating for high performance solar photovoltaic (PV) systems due to its interchangeability, extension and MPPT (Maximum Power Point Tracking) exemption. However, power divergence in cascaded unified PV converter modules can result in unstable system voltage and operation. This article introduced multilevel inverter and H-bridge multilevel cascaded inverter, as well as the power requirements of PV inverters. This paper examines the effects of reactive power compensation and optimization on the safety and performance characteristics of the system and proposes a synchronized distribution of active and reactive power in the network to reduce this instability.

Jammu, Akhil, Vamshi Krishna Gajula, Yashwanth Guntuka e Mounika Dasari. "Nine-level cascaded multilevel inverter for PV systems". i-manager’s Journal on Electrical Engineering 15, n. 4 (2022): 27. http://dx.doi.org/10.26634/jee.15.4.18840.

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This paper presents an improved Cascaded Multilevel Inverter (CMLI) based on a highly efficient and reliable configuration for the minimization of the leakage current. The suggested technique also exhibits minimal switching and conduction losses in addition to having fewer switches. The proposed topology using the specified, high-frequency voltage is decreased by the Pulse Width Modulation (PWM) approach, voltage changes at the terminal and commonmode levels. Keeping away from high-frequency voltage changes results in the reduction in leakage current and a reduction in the size EMI filter. In addition, the continuation of the CMLI and the PWM method for 2m+1 levels is also shown, where m denotes quantity, solar energy, photovoltaic (PV) sources. The suggested PWM to cover all 2m+1, only one carrier wave is required levels of performance. Total Harmonic Distortion (THD) is the planned CMLI network current that meets the specifications of the Institute of Electrical and Electronics Engineers (IEEE) 1547 standard. The paper also includes a comparison of the proposed CMLI topology and the existing multilevel inverter (MLI) PV topology. The article presents the full features of the common-mode and photovoltaic voltage terminal analysis proposed by CMLI using switching function ideas, simulations, and experimental results.

Rechach, Abdelkrim, Sihem Ghoudelbourk e Mihoub Mohamed Larbi. "Impact of Choice of Neutral Point Clamped and H-Bridge Multilevel Inverters for PV Systems". European Journal of Electrical Engineering 24, n. 4 (31 agosto 2022): 213–19. http://dx.doi.org/10.18280/ejee.240406.

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The exploitation of solar energy and the universal interest in photovoltaic systems have increased nowadays due to galloping energy consumption and current geopolitical and economic issues. This has led to high technical and economic requirements. The PV system still faces major obstacles such as high cost and low efficiency compared to other renewable technologies. In addition, the photovoltaic system suffers from the rate of undesirable harmonics of the generated power which could alter the quality of energy and the performance requested by users. In order to remedy this problem, the use of the multi-level inverter is in these cases one of the most promising solutions. Indeed, the multi-level technology seems to be well suited to photovoltaic applications to help fill the need for several sources on the DC side of the converter. The technical performance and reliability of the multi-level inverter used to connect the PV modules to the electrical power distribution networks can improve and make profitable the power produced. In this work, we compare two multi-level inverter topologies for PV systems: H-Bridge (HB) and Neutral Point Clamped (NPC). The comparison between these inverters is based on the criteria of spectral quality of the output voltage and the complexity of the power circuits.

Gajula, Ujwala, Kalpanadevi Manivannan e Nomula Malla Reddy. "Solar PV based seventeen level reduced switch symmetrical multilevel inverter topology fed induction motor". International Journal of Power Electronics and Drive Systems (IJPEDS) 15, n. 2 (1 giugno 2024): 1009. http://dx.doi.org/10.11591/ijpeds.v15.i2.pp1009-1016.

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Multilevel inverters have received a lot of interest in recent years due to their ability to deliver more voltage levels than typical two-level inverters. Because of this property, multilevel inverters can produce output waveforms that closely resemble sinusoidal waveforms, lowering harmonic distortion dramatically. The emergence of reduced switch symmetrical multilevel inverter topologies has developed the curiosity of many different power conversion systems. These new topologies offer numerous advantages, including greater output voltage quality, fewer harmonic distortions, and increased power conversion efficiency. The inclusion of these inverters in the feeding of induction motors is one of their many prominent uses. A 17 levels of multi-level inverter (MLI) topology is presented with reduced switch count and harmonic reduction for power quality improvement. The inverter is fed by isolated equal photovoltaic panels which act as direct current or DC source. To reduce complexity, switching pulses are generated using hybrid pulse width modulation technique which is designed as controller. Through the use of MATLAB/Simulink, the performance assessment of a unique cascaded multilevel inverter-based reduced switch symmetrical inverter feeding an induction motor drive has been verified. The harmonic distortion with reduced switches obtained is 7.47% which is comparatively less than when compared with conventional cascaded H-bridge topology.

Qasim, Mohammed A., Vladimir Ivanovich Velkin, Mustafa Fawzi Mohammed, Alaa Ahmad Sammour, Yang Du, Sajjad Abdul-Adheem Salih, Baseem Abdulkareem Aljashaami e Sharipov Parviz Gulmurodovich. "Design of a multi-level inverter for solar power systems with a variable number of levels technique". International Journal of Power Electronics and Drive Systems (IJPEDS) 14, n. 2 (1 giugno 2023): 1218. http://dx.doi.org/10.11591/ijpeds.v14.i2.pp1218-1229.

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<p>Overall harmonic distortion and losses will grow during an energy conversion process, while power stability will be reduced. Multilevel inverter technologies have recently become very popular as low-cost alternatives for a variety of industrial purposes. The design's minimal benefits include reduced component losses, decreased switching and conduction losses, along with enhanced output voltage and current waveforms. Also, a reduction of the harmonic components of the current and output voltage of the inverter are the most important requirements in multilevel inverters. A seven-level inverter design is presented in this paper that is simulated using MATLAB/Simulink. The inverter converts the DC voltage from three photovoltaic (PV) systems into AC voltage at seven levels. During an outage of one of the PV systems, the inverter will make a switching reduction and supply the AC voltage as a five-level inverter. The inverter’s total harmonic distortion (THD) when it performs as a five-level or seven-level inverter is 4.19% or 1.13% respectively. The modulation technique used is phase disposition via four carriers and a single reference signal at the fundamental frequency.</p>

Più fonti

Tesi sul tema "Multilevel Inverter Photovoltaic (PV) systems":

Prichard, Martin Edward. "SINGLE PHASE MULTILEVEL INVERTER FOR GRID-TIED PHOTOVOLTAIC SYSTEMS". UKnowledge, 2015. http://uknowledge.uky.edu/ece_etds/81.

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Multilevel inverters offer many well-known advantages for use in high-voltage and high-power applications, but they are also well suited for low-power applications. A single phase inverter is developed in this paper to deliver power from a residential-scale system of Photovoltaic panels to the utility grid. The single-stage inverter implements a novel control technique for the reversing voltage topology to produce a stepped output waveform. This approach increases the granularity of control over the PV systems, modularizing key components of the inverter and allowing the inverter to extract the maximum power from the systems. The adaptive controller minimizes harmonic distortion in its output and controls the level of reactive power injected to the grid. A computer model of the controller is designed and tested in the MATLAB program Simulink to assess the performance of the controller. To validate the results, the performance of the proposed inverter is compared to that of a comparable voltage-sourced inverter.

Chen, Baifeng. "High-efficiency Transformerless PV Inverter Circuits". Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/56686.

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With worldwide growing demand for electric energy, there has been a great interest in exploring photovoltaic (PV) sources. For the PV generation system, the power converter is the most essential part for the efficiency and function performance. In recent years, there have been quite a few new transformerless PV inverters topologies, which eliminate the traditional line frequency transformers to achieve lower cost and higher efficiency, and maintain lower leakage current as well. With an overview of the state-of-the-art transformerless PV inverters, a new inverter technology is summarized in the Chapter 2, which is named V-NPC inverter technology. Based this V-NPC technology, a family of high efficiency transformerless inverters are proposed and detailly analyzed. The experimental results demonstrate the validity of V-NPC technology and high performance of the transformerless inverters. For the lower power level transformerless inverters, most of the innovative topologies try to use super junction metal oxide semiconductor field effect transistor(MOSFET) to boost efficiency, but these MOSFET based inverter topologies suffer from one or more of these drawbacks: MOSFET failure risk from body diode reverse recovery, increased conduction losses due to more devices, or low magnetics utilization. By splitting the conventional MOSFET based phase leg with an optimized inductor, Chapter 3 proposes a novel MOSFET based phase leg configuration to minimize these drawbacks. Based on the proposed phase leg configuration, a high efficiency single-phase MOSFET transformerless inverter is presented for the PV micro-inverter applications. The PWM modulation and circuit operation principle are then described. The common mode and differential mode voltage model is then presented and analyzed for circuit design. Experimental results of a 250 W hardware prototype are shown to demonstrate the merits of the proposed MOSFET based phase-le and the proposed transformerless inverter. New codes require PV inverters to provide system regulation and service to improve the distribution system stabilization. One obvious impact on PV inverters is that they now need to have reactive power generation capability. The Chapter 4 improves the MOFET based transformerless inverter in the Chapter 3 and proposed a novel pulse width modulation (PWM) method for reactive power generation. The ground loop voltage of this inverter under the proposed PWM method is also derived with common mode and differential mode circuit analyses, which indicate that high-frequency voltage component can be minimized with symmetrical design of inductors. A 250-W inverter hardware prototype has been designed and fabricated. Steady state and transient operating conditions are tested to demonstrate the validity of improved inverter and proposed PWM method for reactive power generation, high efficiency of the inverter circuit, and the high-frequency-free ground loop voltage. Besides the high efficiency inverter circuit, the grid connection function is also the essential part of the PV system. The Chapter 5 present the overall function blocks for a grid-connected PV inverter system. The current control and voltage control loop is then analyzed, modeled, and designed. The dynamic reactive power generation is also realized in the control system. The new PLL method for the grid frequency/voltage disturbance is also realized and demonstrate the validity of the detection and protection capability for the voltage/frequency disturbance. At last, a brief conclusion is given in the Chapter 6 about each work. After that, future works on device packaging, system integration, innovation on inverter circuit, and standard compliance are discussed.
Ph. D.

Durrant, A. R. "The design and simulation of an efficient photovoltaic inverter". Thesis, University of Reading, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262995.

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Harb, Souhib. "Three-port micro-inverter with power decoupling capability for photovoltaic (pv) systems applications". Master's thesis, University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4683.

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The Photovoltaic (PV) systems have been realized using different architectures, starting with the string and centralized PV system to the modular PV system. Presently, decentralized inverters are being developed at the PV panel power level (known as AC ?? PV Modules). Such new PV systems are becoming more attractive and many expect this will be the trend of the future. The AC-Module PV system consists of an inverter attached to one PV panel. This integration requires that both devices have the same life-span. Although, the available commercial inverters have a relatively short life-span (10 years) compared to the 25 ??year PV. It has been stated in literature that the energy storage capacitor (electrolytic type) in the single-phase inverter is the most vulnerable electronic component. Hence, many techniques such as (power decoupling techniques) have been proposed to solve this problem by replacing the large electrolytic capacitor with a small film capacitor. This thesis will present a quick review of these power decoupling techniques, and proposes a new three-port micro-inverter with power decoupling capability for AC-Module PV system applications.
ID: 028732249; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Thesis (M.S.)--University of Central Florida, 2010.; Includes bibliographical references.
M.S.
Masters
Department of Electrical Engineering and Computer Science
Engineering and Computer Science

Byamungu, Cirhuza Alain. "The formulation and validation of PV inverter efficiency under South Africa climate conditions". Thesis, Cape Peninsula University of Technology, 2018. http://hdl.handle.net/20.500.11838/2823.

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Thesis Submitted in Partial Fulfilment of the Requirements for the Degree of Master of Technology: Electrical Engineering (Energy) in the Department of Electrical, Electronic and Computer Engineering at the Cape Peninsula University of Technology, South Africa.
In photovoltaic power systems, the DC/AC conversion efficiency depends on weather conditions causing PV inverters to operate under fluctuating input power from PV modules. The peak efficiency stated by the inverter manufacturers are often used by project designers to estimate how much power PV plants can produce. However, the varying nature of the DC input power to the inverters, occasioned by varying irradiation and temperature, leads to deviations of the actual efficiency from the peak efficiency. Literature surveys prove that inverter efficiencies must be evaluated against local irradiation profiles to get more precise annual energy yield estimations, since meteorological conditions and solar irradiation profiles vary from one site to another around the planet.

Perez, de Larraya Espinosa Mikel. "Photovoltaic Power Plant Aging". Thesis, Högskolan i Gävle, Avdelningen för byggnadsteknik, energisystem och miljövetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-33252.

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One of the most pressing problems nowadays is climate change and global warming. As it name indicates, it is a problem that concerns the whole earth. There is no doubt that the main cause for this to happen is human, and very related to non-renewable carbon-based energy resources. However, technology has evolved, and some alternatives have appeared in the energy conversion sector. Nevertheless, they are relatively young yet. Since the growth in renewable energies technologies wind power and PV are the ones that have taken the lead. Wind power is a relatively mature technology and even if it still has challenges to overcome the horizon is clear. However, in the PV case the technology is more recent. Even if it is true that PV modules have been used in space applications for more than 60 years, large scale production has not begun until last 10 years. This leaves the uncertainty of how will PV plants and modules age. The author will try to analyse the aging of a specific 63 kWp PV plant located in the roof of a building in Gävle, monitoring production and ambient condition data, to estimate the degradation and the new nominal power of the plant. It has been found out that the degradation of the system is not considerable. PV modules and solar inverters were studied, and even if there are more elements in the system, those are the principal ones. PV modules suffered a degradation of less than 5%, while solar inverters’ efficiency dropped from 95,4% to around 93%.

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.

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Détection de défaut d'arcs intégrée dans un convertisseur intelligent contrôlé par FPGA pour les panneaux photovoltaïques. La mise au point de convertisseur intelligents intégrant des dispositifs de protection est une thématique que cherche à développer l'Institut Technologique de Morelia (Mexique) avec laquelle nous collaborons sur ce projet. L'objectif plus spécifique de ce travail repose sur la détection de défauts d'arc électrique en se basant sur le contrôle intelligent des onduleurs utilisés dans la gestion de l'énergie produite par des panneaux photovoltaïques. Depuis plusieurs années, le développement croissant des panneaux solaires photovoltaïques comme source d’énergie s’est imposé et la sécurité de ces dispositifs liée à la détection de défauts d’arcs électriques est devenu un enjeu majeur. L'approche que nous proposons dans ce travail est le développement d'une stratégie novatrice pour la surveillance et la prédiction de défaillance du réseau électrique constitué de panneaux solaires en présence de défauts d’arcs. Actuellement, la majorité des systèmes de détection comprennent des modules détecteurs disposés dans le circuit électrique à protéger dont la robustesse est loin d'être optimale. L'approche que nous proposons consiste à développer un dispositif de surveillance et de détection de défaut directement intégré dans l'onduleur intelligent. Le contrôle optimal de l'onduleur intelligent assurera une détection fiable de défaut d'arc sans déclenchement intempestif. Le dispositif comprendra également un système de coupure. La méthode de détection que nous privilégions sera basée sur l'analyse du courant et de la tension de ligne. Les algorithmes seront basés sur une analyse temps/fréquence des signatures courant et de tension suivie par une logique pertinente de décision de telle manière à minimiser le taux de fausses détections.Le noyau du convertisseur intelligent est constitué par un FPGA. Le parallélisme des traitements de données assurera le respect des contraintes temps réel. Dans le cadre du projet de thèse, la mise en œuvre, le test des algorithmes de détection et l’implémentation optimale afin de respecter les contraintes temps réel dans le FPGA sera mené dans le cadre d’une cotutelle de thèse entre l’institut technologique de Morelia et l’Université de Lorraine
In 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

Crisafulli, Vittorio Claudio. "Analysis and Development of new strategies for solar energy conversion: New systems of integration, topologies and control". Thesis, Università degli Studi di Catania, 2011. http://hdl.handle.net/10761/226.

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In the recent past, energy and environment have played opposite roles in human progress. Energy has been as an engine for the development and the environment has been as the breaker of it. Only after a more conscious and rigorous international policy on environment protection, not opposed to the development, energy and environmental matters have become unified behind a new sustainable model. This has determined new strategies in the energy sector. Hence, renewable sources have become a must in this new sustainable model. The key role in the last decade has been played by the Distributed Power Generation Systems (DPGS) which present an efficient and economic way of generating electricity closer to the load(s). The DPGS can contribute to an efficient and renewable electricity future by potentially: increasing the use of renewable sources of energy; improving the efficiency of the electricity system by reducing transmission and distribution losses; improving the security of the electricity supply through increased diversity of supply and reduced vulnerability to simultaneous system failures. However, the new trend of using DPGS comes also with a suite of new challenges. One of the challenges is the interaction between the DPGS and the utility grid. As a consequence, grid interconnection requirements applied to the distributed generation are continuously updated in order to maintain the quality and the stability of the utility grid. Consequently, the major tasks of this thesis were to analyze and to develop new strategies for solar energy conversion addressing efficiency and quality in order to allow the DPGS not only to deliver power with high efficiency to the utility grid but also to sustain it. This thesis was divided into three main parts, as follows: Ã Â¢ Small Photovoltaic System: AC moduleÃ Â¢ , Ã Â¢ Control of DPGSÃ Â¢ and Ã Â¢ New Topologies and Devices, technologies for multilevel inverter addressing grid connectionÃ Â¢ . 8 In the first part, the main focus was on topologies for module integration. Additionally, a new topology has been proposed and developed and successfully tested. In the second part, the main focus was c on Control, PWM techniques and ancillary function as grid-connection algorithms. In the third part, the main reported research was concentrated around the role of multilevel inverter in the next future of DPGS. Focusing on topologies and technologies device.

Liu, Xiao. "Power control of single-stage PV inverter for distribution system volt-var optimization". UKnowledge, 2013. http://uknowledge.uky.edu/ece_etds/36.

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Abstract (sommario):

The output power variability of intermittent renewable sources can cause significant fluctuations in distribution system voltages. A local linear controller that exploits the capability of a photovoltaic inverter to provide both real and reactive power is described. This controller substitutes reactive power for real power when fluctuations in the output of the photovoltaic source are experienced. In this way, the inverter can help mitigate distribution system voltage fluctuations. In order to provide real and reactive to the grid, a three-phase grid-connected single-stage photovoltaic system with maximum power point tracking and power control is described. A method of reducing the current harmonic caused by resonance of the LC filter and transformer is presented. The local linear controller is examined using an example distribution system, and it is found that the controller is effective at mitigating voltage violations. The photovoltaic control system is examined using three-phase single-stage PV inverter system. The power control and damping system show good performance and stability under rapid change of irradiance.

Sultani, Jasim Farhood. "Modelling, design and implementation of D-Q control in single-phase grid-connected inverters for photovoltaic systems used in domestic dwellings". Thesis, De Montfort University, 2013. http://hdl.handle.net/2086/9631.

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Abstract (sommario):

This thesis focuses on the single-phase voltage-source inverter for use in photovoltaic (PV) electricity generating systems in both stand-alone and grid-tied applications. In many cases, developments in single-phase PV systems have followed developments in three-phase systems. Time-variant systems are more difficult to control than time-invariant systems. Nevertheless, by using suitable transformation techniques, time-variant systems can often be modelled as time-invariant systems. After the transformation, the control signals that are usually time-variant (often varying sinusoidally in time) become time-invariant at the fundamental frequency, and are hence much easier to deal with. With this approach, synchronous rotating frame control techniques have been previously proposed for high performance three-phase inverter applications. The transformation theory cannot be applied directly in single-phase systems without modification, and the d-q components would not be time-invariant in situations where harmonics, resonances or unbalance is present. Single-phase inverter controller designs based on the use of a synchronous rotating reference frame have been proposed, but such designs do not always perform as well as expected. This thesis aims to improve single-phase voltage-source inverters. The main objective is to address, in terms of cost, efficiency, power management and power quality, the problems found with single-phase designs based on a synchronous rotating frame single-phase inverter controller. Consequently, this thesis focuses on a novel controller approach in order to obtain a more reliable and flexible single-phase inverter. As the first step, this thesis investigates the single-phase inverter switching gate-drive algorithms and develops a form of space-vector pulse-width-modulation (SVPWM) in order to reduce total harmonic distortion. The results of the new SVPWM algorithm demonstrate its superior performance when compared with sinusoidal pulse-width-modulation (SPWM) which is often used with single-phase inverters. The second step, which is further reviewed and presented in this thesis, is the modelling of the single-phase inverter control based on the synchronous rotating frame. A mathematical analysis is conducted to determine the mechanism of the coupling that exists between the voltage phase and amplitude terms, and a new transformation strategy is proposed based on using the voltage phase as a reference at the Park transformation stages, and the current phase as a reference for the current at the transformation stages. The line-frequency components of the feedback signals are transformed to time-invariant components, thus eliminating the ripple and reducing the computational burden associated with the controller stage. Consequently, the inverter feedback controller stage is designed so that the coupling terms are decoupled within the controller itself. The effectiveness of the techniques proposed in this thesis are demonstrated by simulation using the MATLAB/SIMULINK environment. The proposed technique was also investigated through a practical implementation of the control system using a Digital Signal Processor (DSP) and a single-phase inverter. This practical system was tested up to 1 kW only (limited by the available inverter hardware). Nevertheless, the correlation between the simulation and the practical results is high and this gives confidence that the developed mechanism will allow the 2.5kW goal to be achieved. Practical test cases illustrate the effectiveness of the models. In addition, the comparisons between experimental and simulation results permit the system's behaviour and performance to be accurately evaluated. With the development of the new controller, small-scale single-phase renewable energy systems will become more useful in the field of power quality management through their ability to separately control the phase and amplitude of the output voltage. Consequently, incorporation of this type of generator within the national electrical distribution network, as distributed generators (DG) at low-voltage level, can assist with power quality management at the consumer side of the grid. In addition, such a generator can also operate in stand-alone mode if the grid becomes unavailable. The third step in this thesis investigates small-scale single-phase renewable energy systems operating as decentralized distributed generators within a local network. This operation is achieved by controlling the inverter side using the quantities measured at the common coupling point between the grid and the inverter, without requiring other extensive communications. Thus, the small-scale single-phase renewable energy distributed generator systems will contain only a local controller at each installation.

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Capitoli di libri sul tema "Multilevel Inverter Photovoltaic (PV) systems":

Yusop, Nur Iffah Amirah, Naziha Ahmad Azli e Norjulia Mohamad Nordin. "An Asymmetrical Multilevel Inverter in Photovoltaic (PV) Application". In 10th International Conference on Robotics, Vision, Signal Processing and Power Applications, 293–98. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-6447-1_37.

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Crastan, Valentin. "Solar Inverter for Grid-Connected PV-Systems". In Tenth E.C. Photovoltaic Solar Energy Conference, 1027–28. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3622-8_263.

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Srujay, P., Sd Abeebunnisa, N. Prasad, K. Hanu Vamshi e M. Srinivas. "Cascaded H-Bridge Multilevel Inverter for PV Applications". In Lecture Notes in Networks and Systems, 339–51. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1976-3_42.

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Nathgosavi, K. M., e P. M. Joshi. "Possibility Study of PV-STATCOM with CHB Multilevel Inverter: A Review". In Information and Communication Technology for Intelligent Systems, 579–89. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-7078-0_56.

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Ho, Anh-Vu, e Tae-Won Chun. "A Buck-Boost Multilevel Inverter for PV Systems in Smart Cities". In Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 295–306. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-74176-5_26.

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Oliveira, Kleber C., João L. Afonso e Marcelo C. Cavalcanti. "Multilevel Inverter for Grid-Connected Photovoltaic Systems with Active Filtering Function". In IFIP Advances in Information and Communication Technology, 289–98. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-37291-9_31.

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Mohapatra, Gayatri, e Manoj Kumar Debnath. "Implementation of Fuzzy Hysteresis Controller for a Three-Phase Photovoltaic Multilevel Inverter". In Lecture Notes in Networks and Systems, 129–41. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8218-9_11.

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Bishnoi, Tanmay, Ronnie Khanna, Arvind Karandikar e Deepanker Bishnoi. "Annexure 1 – Sample Test Certificates of Solar PV Modules and Grid-Connected Inverter". In Interconnection and Inspection of Grid-Connected Rooftop Solar Photovoltaic Systems, 112–16. London: Routledge, 2021. http://dx.doi.org/10.4324/9781003260509-7.

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Khemili, Fatima Zahra, Moussa Lefouilli, Omar Bouhali e Lakhdar Chaib. "Control of Three Phase Cascaded H Bridge Multilevel Inverter Supplied by a Photovoltaic System". In Lecture Notes in Networks and Systems, 58–65. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-21216-1_6.

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Joshi, Nirav R., e Amit V. Sant. "Control of 7-Level Simplified Generalized Multilevel Inverter Topology for Grid Integration of Photovoltaic System". In Advances in Intelligent Systems and Computing, 473–86. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-5952-2_41.

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Atti di convegni sul tema "Multilevel Inverter Photovoltaic (PV) systems":

A. F. Ferreira, Rodrigo, Márcio C. B. P. Rodrigues e Pedro G. Barbosa. "PV Micro-Inverters as Modules of Multilevel Converters". In Congresso Brasileiro de Automática - 2020. sbabra, 2020. http://dx.doi.org/10.48011/asba.v2i1.1602.

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Abstract (sommario):

The increasing use of renewable energies, especially photovoltaic energy generation, has motivated research in the area of power electronics in order to optimize the integration of these sources into the conventional electric system. In general, photovoltaic systems are connected to the AC grid and, for this purpose, use voltage Inverters. Several topologies can be used for this, among them, the Micro-Inverters and the Multi-Modular Converters, both having their advantages and disadvantages. Therefore, the objective of this paper is to integrate the concepts of both technologies in a Modular Multilevel Converter in which each module is given by a Micro-Inverter. The proposed system is modeled in PSIM and simulation results show that the proposed system presents satisfactory results even under conditions of total or partial shading of PV modules.

Sharma, Mayank, Uma Yadav, Himanshu Kumar Singh e Javalkar Dinesh Kumar. "Comparative Assessment of Photovoltaic-Based Diode-Clamped Multilevel Inverters for Renewable Energy Integration". In International Conference on Cutting-Edge Developments in Engineering Technology and Science. ICCDETS, 2024. http://dx.doi.org/10.62919/iofd2132.

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The integration of photovoltaic (PV) systems with the electrical grid is a crucial step toward increasing the penetration of renewable energy sources. This paper presents a comparative assessment of photovoltaic-based diode-clamped multilevel inverters (DCMLIs), which are pivotal for efficient energy conversion and grid integration. We evaluate various configurations of DCMLIs in terms of efficiency, harmonic distortion, cost-effectiveness, and scalability. Through a combination of simulation and experimental methods, we identify optimal inverter designs that offer enhanced performance for different scales of PV installations. Our findings reveal that specific DCMLI configurations significantly reduce harmonic distortion and improve the overall efficiency of power conversion, thereby facilitating more reliable and robust integration of solar energy into the grid. The study provides valuable insights into the selection of appropriate inverter technology that aligns with the operational demands and economic considerations of modern PV systems.

Suhana, Hadi, Ngapuli I. Sinisuka, Muhammad Nurdin, Yvon Besanger e Vincent Debusschere. "Switches Controlling to Implement Adaptive Multilevel Inverter on PV System". In 2017 IEEE 44th Photovoltaic Specialists Conference (PVSC). IEEE, 2017. http://dx.doi.org/10.1109/pvsc.2017.8366418.

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Lee, Hoe-Gil. "Multilevel Optimal Design of a Solar PV Array System Using Game Theory Approach". In ASME 2019 Power Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/power2019-1840.

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Abstract This study proposes a method, grounded in a multilevel decision-making approach, for a stationary fixed-plate photovoltaic (PV) collector system. The system is comprised of three different subsystems: cell, panel, and array. We consider photovoltaic effects for output performance and an inverter system for distribution from the PV collector, including multiple conflicting objectives in individual subsystems in terms of cell conversion efficiency, power output, incident solar energy, seasonal characteristics, and costs. In terms of the performance in individual subsystems, the problem is reformulated into several smaller subproblems at each subsystem, and a coordination problem at the system level is compromised for optimization purposes. Multilevel optimization for the stationary fixed-plate PV collector system is achieved through the results of single-objective optimization that uses Genetic Algorithm programming (GA) to find global optimum solutions with decision-making under modified game theory. Thus, this work contributes to the optimal design of a stationary fixed-plate PV collector system for the best compromise solution based on specified requirements.

Letha, Shimi Sudha, Tilak Thakur, Jagdish Kumar, Dnyaneshwar Karanjkar e Santanu Chatterji. "Design and Real Time Simulation of Artificial Intelligent Based MPP Tracker for Photo-Voltaic System". In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-37967.

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This paper presents an Artificial Intelligent based Maximum Power Point Tracking (MPPT) of a photo-voltaic system implementation using dSPACE 1104. The paper also proposes a novel Adaptive Neuro-Fuzzy Inference System (ANFIS) / Constant Voltage Tracker (CVT) for a photovoltaic (PV) powered multilevel inverter which requires a fixed constant dc voltage at its input. The MPPT algorithms viz. perturb and observe, incremental conductance, neural network, ANFIS and ANFIS/CVT have been designed and implemented on laboratory prototype. The modeling of various MPPT algorithms have been done on MATLAB/SIMULINK platform. Real time simulations have been carried out using dSPACE R&D controller board and CONTROLDESK software. The performance comparisons of various MPPT techniques applied to stand-alone PV system with resistive load have been presented for varying solar radiation conditions. The authors hope that the comparative analysis presented in this work will be helpful for further research.

Patangia, Hirak, e Dennis Gregory. "An efficient cascaded multilevel inverter suited for PV application". In 2010 35th IEEE Photovoltaic Specialists Conference (PVSC). IEEE, 2010. http://dx.doi.org/10.1109/pvsc.2010.5615922.

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Kumar, Ashutosh, R. K. Mandal, Ravi Raushan e Pratyush Gauri. "Grid Connected Photovoltaic Systems with Multilevel Inverter". In 2020 International Conference on Emerging Frontiers in Electrical and Electronic Technologies (ICEFEET). IEEE, 2020. http://dx.doi.org/10.1109/icefeet49149.2020.9187010.

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Chamarthi, Phanikumar, Nataraj Pragallapati e Vivek Agarwal. "Novel 1-ϕ multilevel current source inverter for balanced/unbalanced PV sources". In 2014 IEEE 40th Photovoltaic Specialists Conference (PVSC). IEEE, 2014. http://dx.doi.org/10.1109/pvsc.2014.6925591.

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Singh, Deepak Kumar, Saibal Manna e A. K. Akella. "Grid Connected PV System Using Multilevel Inverter". In 2021 7th International Conference on Electrical Energy Systems (ICEES). IEEE, 2021. http://dx.doi.org/10.1109/icees51510.2021.9383721.

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Dave, Mayuresh, e Madhav Bhagdev. "A comparative study of photovoltaic (PV) based diode clamped multilevel inverter (DCMLI)". In 2016 7th India International Conference on Power Electronics (IICPE). IEEE, 2016. http://dx.doi.org/10.1109/iicpe.2016.8079330.

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