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Gotowa bibliografia na temat „Grid Tied Multilevel Inverter”

Autor: Grafiati

Data publikacji: 6 września 2023

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Artykuły w czasopismach na temat "Grid Tied Multilevel Inverter"

G, Nayana, i Dr Savita D. Torvi. "Multilevel Inverter for Solar Photovoltaic Applications - A Review". International Journal for Research in Applied Science and Engineering Technology 11, nr 7 (31.07.2023): 439–41. http://dx.doi.org/10.22214/ijraset.2023.54669.

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Abstract: This paper presents a review of Multilevel inverter for solar Photovoltaic applications. Design and Implementation of Multilevel Inverters for electric vehicles has been studied. Grid tied PV system using modular multilevel inverter is analysed. Performance analysis of Nested multilevel inverter topology for 72V electric vehicle applications is studied. Multilevel inverter for PV system employing MPPT technique is studied. Power Electronics application in renewable application in renewable energy is studied.

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N., Sujitha, Partha Sarathi Subudhi, Krithiga S., Angalaeswari S., Deepa T. i Subbulekshmi D. "Grid tied PV System using modular multilevel inverter". International Journal of Power Electronics and Drive Systems (IJPEDS) 10, nr 4 (1.12.2019): 2013. http://dx.doi.org/10.11591/ijpeds.v10.i4.pp2013-2020.

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A grid tied photovoltaic system using modular multilevel inverter topology is proposed in this paper. Basic unit structure of modular multilevel inverter used in this system is capable of converting DC power from PV array to AC power for feeding power to the household loads or utility grid. The proposed modular multilevel inverter structure has lesser power electronic devices compared to the existing multilevel inverter topologies. The proposed system generates a nearly sinusoidal signal and achieves better output profile with low total harmonic distortion. Simulation of the proposed system is carried out in MATLAB/Simulink software and the results are presented.

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Salem, Mohamed, Anna Richelli, Khalid Yahya, Muhammad Najwan Hamidi, Tze-Zhang Ang i Ibrahim Alhamrouni. "A Comprehensive Review on Multilevel Inverters for Grid-Tied System Applications". Energies 15, nr 17 (29.08.2022): 6315. http://dx.doi.org/10.3390/en15176315.

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Multi-level inverters (MLIs) have been widely used in recent years due to their various advantages in industrial and grid-connected applications. Traditional MLI topologies are being hampered by the rapid surge of renewable energy systems (RES) as a result of performance difficulties such as poor power reliability, an economically unviable structure, and a lack of efficiency. These difficulties are due to the traditional MLI topologies’ inability to keep up with the increasing demand for RES. Because of concerns about performance and limitations posed by classic MLI topologies, researchers have found themselves driven to the idea of building innovative hybrid MLI topologies. This study provides a comprehensive analysis of multilevel inverter systems that are wired into the main power supply. Grid-connected inverter types and their configurations are discussed in depth in this review. Diverse multi-level inverter topologies, as well as the different approaches, are divided into various categories and discussed in depth. Additionally, a number of control reference frames for inverters were brought forward for discussion. Furthermore, different inverter control strategies were investigated, followed by a tabular summary of recent developments in the inverter-related literature for the convenience of the readers. Moreover, the recently proposed grid-connected multi-level inverter systems were discussed including their findings and innovations. In conclusion, a brief description of the study’s scope was offered and research directions for future studies were provided.

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Fu, Xingang, Shuhui Li, Abdullah Hadi i Rajab Challoo. "Novel Neural Control of Single-Phase Grid-Tied Multilevel Inverters for Better Harmonics Reduction". Electronics 7, nr 7 (12.07.2018): 111. http://dx.doi.org/10.3390/electronics7070111.

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A single-phase Cascaded H-Bridge (CHB) grid-tied multilevel inverter is introduced with a detailed discussion of the proposed novel neural controller for better efficiency and power quality in the integration of renewable sources. An LCL (inductor-capacitor-inductor) filter is used in the multilevel inverter system to achieve better harmonic attenuation. The proposed Neural Network (NN) controller performs the inner current control and tracks the references generated from the outer loop to satisfy the requirements of voltage or power control. Two multicarrier-based Pulse Width Modulation (PWM) techniques (phase-shifted modulation and level-shifted modulation) are adopted in the development of the simulation model to drive the multilevel inverter system for the evaluation of the neural control technique. Simulations are carried out to demonstrate the effectiveness and efficient outcomes of the proposed neural network controller for grid-tied multilevel inverters. The advantages of the proposed neural control include a faster response speed and fewer oscillations compared with the conventional Proportional Integral (PI) controller based vector control strategy. In particular, the neural network control technique provides better harmonics reduction ability.

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Ben Hamad, Khlid, Doudou N. Luta i Atanda K. Raji. "A Grid-Tied Fuel Cell Multilevel Inverter with Low Harmonic Distortions". Energies 14, nr 3 (29.01.2021): 688. http://dx.doi.org/10.3390/en14030688.

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As a result of global energy demand increase, concerns over global warming, and rapid exhaustion of fossil fuels, there is a growing interest in energy system dependence on clean and sustainable energy resources. Attractive power technologies include photovoltaic panels, wind turbines, and biomass power. Fuel cells are also clean energy units that substitute power generators based on fossil fuels. They are employed in various applications, including transportation, stationary power, and small portable power. Fuel cell connections to utility grids require that the power conditioning units, interfacing the fuel cells and the grids, operate accordingly (by complying with the grid requirements). This study aims to model a centralised, single-stage grid-tied three-level diode clamped inverter interfacing a multi-stack fuel cell system. The inverter is expected to produce harmonic distortions of less than 0.5% and achieve an efficiency of 85%. Besides the grid, the system consists of a 1.54 MW/1400 V DC proton exchange membrane fuel cell, a 1.3 MW three-level diode clamped inverter with a nominal voltage of 600 V, and an inductance-capacitance-inductance (LCL) filter. Two case studies based on the load conditions are considered to assess the developed system’s performance further. In case 1, the fuel cell system generates enough power to fully meet this load and exports the excess to the grid. In the other case, a load of 2.5 MW was connected at the grid-tied fuel cell inverter’s output terminals. The system imports the grid’s power to meet the 2.5 MW load since the fuel cell can only produce 1.54 MW. It is demonstrated that the system can supply and also receive power from the grid. The results show the developed system’s good performance with a low total harmonic distortion of about 0.12% for the voltage and 0.07% for the current. The results also reveal that the fuel cell inverter voltage and the frequency at the point of common coupling comply with the grid requirements.

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Baig, Muhammad Anas, Syed Abdul Rahman Kashif, Irfan Ahmad Khan i Ghulam Abbas. "Quick Search Algorithm-Based Direct Model Predictive Control of Grid-Connected 289-Level Multilevel Inverter". Electronics 12, nr 15 (2.08.2023): 3312. http://dx.doi.org/10.3390/electronics12153312.

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Multilevel inverters, known for their low switching loss and suitability for medium- to high-power applications, often create a heavy computational overhead for the controller. This paper addresses the aforementioned limitation by presenting a novel approach to Direct Model Predictive Control (DMPC) for a grid-tied 289-level ladder multilevel inverter (LMLI). The primary objective is to achieve perfect inverter current control without enumeration. The proposed control method provides a single best solution without complete exploration of the search space. This generalized method can be applied to any multilevel inverter (MLI), enabling them to be used in the grid-tied mode without the computational burden due to a large number of switching states. The DMPC of LMLI with 289-level output and corresponding 289 control inputs, utilizes a discrete model to predict the future state of the state variable. In order to alleviate the enumeration burden, virtual sectors on a linear scale are introduced, and a general formula is provided to identify the single best state among the 289 states, reducing the time required to find the best optimal state per sampling period. Moreover, the proposed control scheme is independent of objective evaluation.

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GRABKO, Volodymyr. "Mathematical control system of grid-tied multilevel voltage inverter". PRZEGLĄD ELEKTROTECHNICZNY 1, nr 3 (5.03.2017): 135–41. http://dx.doi.org/10.15199/48.2017.03.31.

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Shadab, Mirza Mohammad, Mohammad Arifuddin Mallick, Mohammad Tufail i M. S. Jamil Asghar. "Development of a Novel Three Phase Grid-Tied Multilevel Inverter Topology". International Journal of Power Electronics and Drive Systems (IJPEDS) 7, nr 3 (1.09.2016): 826. http://dx.doi.org/10.11591/ijpeds.v7.i3.pp826-834.

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The conventional line-commutated ac-to-dc converters/ inverters have square-shaped line current. It contains higher-order harmonics which generates EMI and it causes more heating of the core of distribution or power transformers. PWM based inverters using MOSFET/IGBT have higher switching losses, and the power handling capability and reliability are quite low in comparison to thyristors/ SCR. A thyristor based forced commutated inverters are not suitable for PWM applications due to the problems of commutation circuits. A pure sinusoidal voltage output or waveform with low harmonic contents is most desirable for ac load using dc to ac conversion. This paper presents a new multilevel inverter topology in which three phase ac- to-dc converter circuits are used in inversion mode by controlling the switching angle. Due to natural commutation, no separate circuit is required for synchronization. In this paper simulation and analysis are done for grid-tied three-phase 6-pulse, Two three-phase, 3-pulse and 12-pulse converter. These converters are analysed for different battery voltage and different switching angle combinations in order to reduce the total harmonic distortion (THD). Three-phase harmonic filters are further added to the grid side to reduce the harmonic content in the line current. A comparative study of these converters is also presented in this paper.

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Khoun Jahan, Hossein, Reyhaneh Eskandari, Tohid Rahimi, Rasoul Shalchi Alishah, Lei Ding, Kent Bertilsson, Mehran Sabahi i Frede Blaabjerg. "A Limited Common-Mode Current Switched-Capacitor Multilevel Inverter Topology and Its Performance and Lifetime Evaluation in Grid-Connected Photovoltaic Applications". Energies 14, nr 7 (30.03.2021): 1915. http://dx.doi.org/10.3390/en14071915.

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In this paper, a switched-capacitor multilevel inverter with voltage boosting and common-mode-voltage reduction capabilities is put forth. The proposed inverter is synthesized with one-half bridge and several switched-capacitor cells. Due to the voltage boosting and common-mode current reduction features, the proposed multilevel inverter is suitable for grid-connected PV applications. In addition, an analytical lifetime evaluation based on mission profile of the proposed inverter has been presented to derive lifetime distribution of semiconductors. Whereas in the proposed inverter, any components failure can bring the whole system to a shutdown. The series reliability model is used to estimate the lifetime of the overall system. The performance of the suggested multilevel inverter in grid-connected applications is verified through the simulation results using the grid-tied model in Matlab/Simulink. Moreover, the viability and feasibility of the presented inverter are proven by using a one kW lab-scaled prototype.

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Madasamy, P., V. Suresh Kumar, P. Sanjeevikumar, Jens Bo Holm-Nielsen, Eklas Hosain i C. Bharatiraja. "A Three-Phase Transformerless T-Type- NPC-MLI for Grid Connected PV Systems with Common-Mode Leakage Current Mitigation". Energies 12, nr 12 (24.06.2019): 2434. http://dx.doi.org/10.3390/en12122434.

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DC to AC inverters are the well-known and improved in various kinds photovoltaic (PV) and gird tied systems. However, these inverters are require interfacing transformers to be synchronized with the grid-connected system. Therefore, the system is bulky and not economy. The transformerless inverter (TLI) topologies and its grid interface techniques are increasingly engrossed for the benefit of high efficiency, reliability, and low cost. The main concern in the TL inverters is common mode voltage (CMV), which causes the switching-frequency leakage current, grid interface concerns and exaggerates the EMI problems. The single-phase inverter two-level topologies are well developed with additional switches and components for eliminating the CMV. Multilevel inverters (MLIs) based grid connected transformerless inverter topology is being researched to avail additional benefits from MLI, even through that are trust topologies presented in the literature. With the above aim, this paper has proposed three -phase three-level T type NP-MLI (TNP-MLI) topology with transformerless PV grid connected proficiency. The CM leakage current should handle over mitigating CMV through removing unwanted switching events in the inverter pulse width modulation (PWM). This paper is proposes PV connected T type NP-MLI interface with three-phase grid connected system with the help of improved space vector modulation (SVM) technique to mitigate the CM leakage current to overcome the above said requests on the PV tied TL grid connected system. This proposed the SVM technique to mitigate the CM leakage current by selecting only mediums, and zero vectors with suitable current control method in order to maintain the inverter current and grid interface requirements. The proposed PV tied TNP-MLI offering higher efficiency, lower breakdown voltage on the devices, smaller THD of output voltage, good reliability, and long life span. The paper also investigated the CM leakage currents envisage and behavior for the three-phase MLI through the inverter switching function, which is not discussed before. The proposed SVM on TL-TNP-MLI offers the reliable PV grid interface with very low switching-frequency leakage current (200mA) for all the PV and inverter operation conditions. The feasibility and effectiveness of the TLI and its control strategy is confirmed through the MATLAB/Simulink simulation model directly as compared with 2kW roof top PV plant connected TL-TNP-MLI experimentation, showing good accordance with theoretical investigation. The simulation and experimental results are demonstrated and presented in the good stability of steady state and dynamics performances. The proposed inverter reduces the cost of grid interface transformer, harmonics filter, and CMV suppressions choke.

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Rozprawy doktorskie na temat "Grid Tied Multilevel Inverter"

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.

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Di, Tullio Luccas. "Optimization of a grid-tied inverter : an application-oriented for designing multilevel converters". Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/58542.

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Recent developments in energy systems, including the rapid adoption of renewable energy sources and expansion of microgrids have been introducing new challenges and opportunities for the power electronics industry. Of particular interest to this thesis is the increase of grid-connected DC systems. As a means to reduce cost of copper infrastructure these systems favour the utilization of higher DC link voltages. To accommodate higher voltages, a variety of multilevel converters have been proposed, which generally can be built without specialized components, present lower dV/dt losses and synthesize AC signals with better power quality. Irrespective of the application, the power electronics industry has traditionally relied on generic rules and practices to quickly design converters. Rarely does the development cycle allow for thorough investigation of the converter design, which could enhance performance and give an edge over competitors. This thesis proposes using optimization techniques to aid power electronics engineers in the design of multilevel converters. The Neutral Point Clamped (NPC) with its variant the Active NPC (ANPC) were selected for the exercise presented. Chapter 2 of this thesis explains the operation and modulation of the topologies. From the analysis, the conduction and switching losses of each device can be predicted. A description of three semiconductor technologies is presented with their characteristics and source of losses. Lastly an equation to size the filter inductor is introduced. All this information is packaged into a model used in the optimization. Chapter 3 introduces the optimization strategy. Given the complex nature of power electronics, four objective functions were adopted: efficiency, loss distribution, inductance and cost. These functions were combined through a weight system which allows priorities to be asserted. Next, design variables are introduced along with their respective impacts on the objective functions. Experiments performed with a hardware platform showed the model closely predicts the impact of the design variables on the objective functions. Confident in the model, the optimization was carried out for various scenarios. Single objective optimization led to converters that excel in one aspect but were often not practical. When optimizing with multiple objectives a good compromise was reached with a practical converter.
Applied Science, Faculty of
Electrical and Computer Engineering, Department of
Graduate

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Liu, Qing. "Control of grid-tied inverters for nano-grids". Doctoral thesis, Università degli studi di Padova, 2019. http://hdl.handle.net/11577/3422338.

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In recent times, with the development of renewables, the concept of micro-grid emerged, representing a novel bottom up power distribution organization. The micro-grid can integrate the nearby distributed, and mostly renewable, energy sources, the storage devices and the loads into the grid, with increased efficiency, flexibility and reliability, showing significant economical and environmental benefits. The micro-grid concept can be further scaled down to the range of a single house or small building, and differentiated by a new terminology, nano-grid. The proposal of the nano-grid concept is aimed at simplifying the application scenarios, so that a hierarchical bottom-up power distribution network can be established, where the nano-grid plays the lowest-end role. It can not only operate autonomously, feeding the typical household appliances from the available renewable sources; thanks to the modular smart grid architecture, it can also be conveniently interconnected to other similar units, operating in parallel and harmoniously energizing a larger region in a city, a small-island or a village. In addition, the nano-grid also has the possibility of self-integrating into the utility grid, exchanging power with the mains when needed, thanks to a specifically designed grid interface converter. Referring to the latter, a variety of requirements are defined by applicable standards, in terms of load power quality, grid support functionalities, abnormal condition ride-through and protection means. The realization of the above functionalities is heavily dependent on the control of the grid interfacing inverter hosted within the nano-grid, about which numerous solutions have been proposed in the existing literature. However, few of them can realize all the functionalities simultaneously in a single controller. The target of this dissertation is therefore proposing, analyzing and testing a high-quality, multi-functional control scheme for grid-tied inverters. This goal is reached in three steps: i) a deep literature review, ii) the identification, study and realization of the multi-functional inverter controller, and iii) the implementation of further, higher level functionalities, like the grid-supporting and parallel operation capabilities. Accordingly, the study is initiated from step i), with an overview of existing control strategies and key functionalities of grid-tied inverters. The comprehensive review of a research topic is, in any case, very advantageous to define the state of the art solutions and to evaluate the margins for improvement in the existing technology. In this research case, it allowed to understand that a triple-loop controller structure is the most suitable to achieve high-performance control of the nano-grid electrical system and the most promising as to the capability of implementing multiple interface and protection functionalities jointly. In the second step ii), a large-bandwidth triple-loop controller is proposed, whose implementation is the first contribution of this dissertation. The peculiarity of the proposed controller is the large-bandwidth control of the injected grid current, which brings in many beneficial features. Leveraging on this controller organization, multiple functionalities are later implemented by means of a superimposed flexible mode-transition manager and an auto-tuner, altogether forming a high quality, multi-functional control scheme for grid-tied inverters. This represents the second contribution delivered by this dissertation. Finally, in step iii), the extended scenario of multiple parallel-connected grid-tied inverters is discussed, targeting the realization of distributed grid-supporting functionalities in grid-tied mode and the automatic balanced power sharing in parallel-islanded mode. The final implemented control scheme provides a feasible solution for the forthcoming smart nano-grids and represents the third contribution of this research activity.

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Zhao, Zheng. "High Efficiency Single-stage Grid-tied PV Inverter for Renewable Energy System". Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/27520.

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A single-phase grid connected transformerless photovoltaic (PV) inverter for residential application is presented. The inverter is derived from a boost cascaded with buck converter along with a line frequency unfolding circuit. Due to its novel operating modes, high efficiency can be achieved because there is only one switch operating at high frequency at a time, and the converter allows the use of power MOSFET and ultra-fast reverse recovery diode. This dissertation begins with theoretical analysis and modeling of this boost-buck converter based inverter. And the model indicates small boost inductance will leads to increase the resonant pole frequency and decrease the peak of Q, which help the system be controlled easier and more stable. Thus, interleaved multiple phases structure is proposed to have small equivalent inductance, meanwhile the ripple can be decreased, and the inductor size can be reduced as well. A two-phase interleaved inverter is then designed accordingly. The double-carrier modulation method is proposed based on the inverterâ s operation mode. The duty cycle for buck switch is always one if the inverter is running in boost mode. And the duty cycle for boost switches are always zero if the inverter is running in buck mode. Because of this, the carrier for boost mode is stacked on the top of the carrier for buck mode, as a result, there is no need to compare the input and output voltage to decide which mode the inverter should operate in. And the inverter operates smoothly between these two modes. Based on similar concept, three advanced modulation methods are proposed. One of them can help further improve the efficiency, and one of them can help increase the bandwidth and gain, and the last one takes the advantage of both. Based on similar concept, another three dual-mode double-carrier based SPWM inverters are proposed. With both step-up and step-down functions, this type of inverter can achieve high efficiency in a wide range because only one switch operates at the PWM frequency at a time. Finally, the simulation and experiment results are shown to verify the concept and the tested CEC (California Energy Commission) efficiency is 97.4%. It performs up to 2% more efficiently better than the conventional solution.
Ph. D.

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Abdelrazek, Ahmed Abdelhakim Moustafa. "Transformerless Grid-Tied Impedance Source Inverters for Microgrids". Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3427190.

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Renewable energy source (RESs) diffusion into the power system is continuously increasing, where the world cumulative installed capacity of solar and wind energy sources increased from around 63.2 GW in 2005 to around 903.1 GW in 2017 according to International Renewable Energy Agency (IRENA). The energy utilization from these RESs implies the use of what is called power conditioning stage (PCS). Such PCS acts as an interfacing layer between the RES side and the customer side, i. e. the load or the grid. These PCSs can utilize many different configurations depending on the employed RES, where the two-stage architecture is commonly used with solar photovoltaic (PV) systems due to the low or variable output voltage. Such two-stage architecture is usually implemented using a boost converter in order to regulate the PV source output voltage and maximize the output power, and a voltage source inverter (VSI) in order to achieve the inversion operation. On the other hand, impedance source inverters represent a different family of the existing PCSs, which are called single-stage power converters as they embraces the boosting capability within the inversion operation. This family of PCSs is seen as an interesting and competitive alternative to the twostage configuration, which are mandatory for low or variable voltage energy sources, such as PV and fuel cell energy sources. Therefore, these impedance source inverters have been utilized in many different applications, such as distributed generation and electric vehicles. This family of PCSs, i. e. impedance source inverters, has experienced a fast evolution during the last few years in order to replace the conventional two-stage architecture since the first release of the three-phase Zsource inverter (ZSI) in 2003. Consequently, many research activities have been established in order to improve the ZSIs performance from different perspectives, such as overall voltage gain, voltage stresses across the different devices, continuity of the input current, and conversion efficiency. Among these different topological improvements, the conventional ZSI and the quasi-ZSI (qZSI), are the most commonly used structures. Accordingly, the objective of this thesis is to study and reinforce the performance of this family of PCSs. Hence, the work in this thesis starts first by addressing the challenges behind eliminating the low frequency transformer in grid-tied PV systems in order to improve the conversion system efficiency, where a new measurement technique for the dc current component is proposed in order to effectively mitigate this dc current component. Then, the performance of the classical impedance source inverters has been assessed by studying all the possible modulation schemes and proposing a new one, under which the efficiency of these classical impedance source inverters have been improved. Furthermore, the partial-load operation of these impedance source inverters, considering the three-phase qZSI, has been studied and the possible ways of achieving a wide range of operation have been investigated. Due to the seen demerits behind the classical impedance source inverters, an alternative new topology, which is called split-source inverter (SSI), is proposed, under which these demerits have effectively been mitigated or eliminated. Then, the challenges behind grid-tied operation of this single-stage dc-ac power converters has been investigated considering the SSI topology. It is worth to note that all the prior mentioned contributions have been validated experimentally. Finally, this thesis is divided into two chapters, where the first chapter introduces an extended summary of the work done concerning the thesis topic, while the second part includes some selected papers from the publications that have been developed during the doctoral study. These selected papers give all the details of the work done in each section in the extended summary.

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Photong, Chonlatee. "A current source inverter with series AC capacitors for transformerless grid-tied photovoltaic applications". Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/13128/.

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The Current Source Inverter (CSI) is one of the simplest power converter topologies that can convert DC to AC and feed power generated from photovoltaic (PV) cells into the AC grid with a single power conversion stage over the whole PV voltage range. The CSI also provides smooth DC current which is one of the requirements of the PV cells as well as preventing reverse current using unidirectional switches. However, the CSI operates with low efficiency at lower PV voltages, which is where the PV cells produce maximum output power. This low efficiency is caused by large differences in voltage levels between the PV side and the grid side across the converter. This thesis presents an alternative topology to the three-phase CSI by connecting an AC capacitor in series with each AC phase line of the CSI circuit. The presence of the series AC capacitors in the CSI topology allows the AC voltage levels to be adjusted to match the voltage levels of the PV cells. Therefore, the CSI with series AC capacitors is able to operate with optimal DC-AC voltage levels. Performance of the proposed topology is evaluated in comparison to the standard CSI and five other converter topologies based on transformerless circuit concepts selected from those already available in the market and suitable converters discussed in the literature. All converter topologies were modeled and simulated with the SABER simulation software package. The CSI with series AC capacitors prototype was constructed in order to validate the feasibility of the proposed topology and the performance of the proposed topology in comparison to the standard CSI. Simulation results show that the CSI with series AC capacitors provides improved efficiency and better input/output power quality in comparison to the standard CSI. The proposed topology also achieves the lowest output line current distortion, lowest voltage stress across the circuit components and lowest estimated cost of power semiconductors when compared to all considered topologies. Experimental results are also presented to validate the simulation results.

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Eldridge, Christopher Sean. "Using super capacitors to interface a small wind turbine to a grid-tied micro-inverter". Thesis, Kansas State University, 2011. http://hdl.handle.net/2097/8754.

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Streszczenie:

Master of Science
Department of Electrical Engineering
William B. Kuhn
During the development of an educational renewable energy production platform, it was found that there were no low-cost, efficient grid-tie interfaces for a 160 W DC wind turbine. Typically, a small DC wind turbine is used in conjunction with a rechargeable battery bank or, if the wind turbine is directly interfaced with a grid-tie inverter, a regulator with a diversion-load. The use of batteries is undesirable due to their high-cost and high-maintenance characteristics. Diversion loads by nature waste power, as any excess energy that cannot be accepted by a battery or inverter is usually converted into heat through a resistive element. Initially, a 24 V DC, 160 W Air Breeze small wind turbine was directly connected to an Enphase Energy M190 grid-tie micro-inverter. The 24 V DC Air Breeze wind turbine is designed to charge a battery or bank of batteries while the M190 micro-inverter is designed to convert the DC output of a 200 W solar panel to grid-tied AC power. As expected, the power-production response time associated with the small wind turbine and the power-accepting, load-matching response time of the micro-inverter were not compatible. The rapidly changing power output of the small wind turbine conflicted with the slow response time of the micro-inverter resulting in little power production. Ultimately, the response time mismatch also produced sufficiently large voltage spikes to damage the turbine electronics. In this thesis, a solution for a low-cost, efficient grid-tie interface using no batteries and no diversion load is presented. A capacitance of eight Farads is placed in parallel with the small wind turbine and the micro inverter. The large capacitance sufficiently smoothes the potential abrupt voltage changes produced by the wind turbine, allowing the micro-inverter adequate time to adjust its load for optimal power conversion. Laboratory experiments and data from an implementation of such a parallel super capacitor wind turbine to grid-tie micro-inverter configuration are provided along with DC and AC power production monitoring circuits interfaced with a micro controller.

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Johnson, Benjamin Anders. "Modeling and Analysis of a PV Grid-Tied Smart Inverter's Support Functions". DigitalCommons@CalPoly, 2013. https://digitalcommons.calpoly.edu/theses/994.

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The general trends in the past decade of increasing solar cell efficiency, decreasing PV system costs, increasing government incentive programs, and several other factors have all combined synergistically to reduce the barriers of entry for PV systems to enter the market and expand their contribution to the global energy portfolio. The shortcomings of current inverter functions which link PV systems to the utility network are becoming transparent as PV penetration levels continue to increase. The solution this thesis proposes is an approach to control the inverters real and reactive power output to help eliminate the problems associated with PV systems at their origin and in addition provide the grid with ancillary support services. The design, modeling, and analysis of a grid-tied PV system was performed in the PSCAD software simulation environment. Results indicate that in the presence of grid disturbances the smart inverter can react dynamically to help restore the power system back to its normal state. A harmonic analysis was also performed indicating the inverter under study met the applicable power quality standards for distributed energy resources.

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Alskran, Faleh A. "Dynamic modeling and analysis of the three-phase voltage source inverter under stand-alone and grid-tied modes". Thesis, Kansas State University, 2014. http://hdl.handle.net/2097/18220.

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Master of Science
Department of Electrical and Computer Engineering
Behrooz Mirafzal
Increasing energy demand, rising oil prices, and environmental concerns have forced attention to alternative energy sources that are environmentally friendly and independent of fossil fuels. Renewable energy sources (RES) have become an attractive alternative to the traditional energy sources for electric power generation. However, one of the main challenges of RES adaption arises when connecting RES to the electric grid. Voltage source inverters (VSIs), typically, connect RES to the electric grid. Similar to any engineering system, detailed dynamic models of the VSIs are needed for design and analysis purposes. However, due to the non-linearity of VSIs, development of dynamic models that can accurately describe their behavior is a complex task. In this thesis, a detailed averaged-state-space model of the two-level three-phase space vector pulse width modulation VSI and its companion LCL filter is derived. Because VSIs can operate under stand-alone and grid-tied modes, two models were derived for each case. In the derived models, the VSI modulation index m and phase angle ϕ are initially considered constant. In practice, however, these parameters are considered the main control parameters. To model these parameters as control inputs, small-signal models of the VSI under stand-alone and grid-tied modes were derived. To verify the accuracy of the developed large-signal and small-signal models, Matlab/Simulink simulations were carried out. The simulation results were compared against the models results. Moreover, the models were verified through lab experiments. The developed models can be used as design and analysis tools. In addition, the developed models can be used as fast and efficient simulation tools for system studies, when the modeling of switching transients is not needed. Nowadays, the number of VSIs connected to the electric grid is growing exponentially. The amount of time and computation needed to simulate VSIs using simulation software packages can be significantly decreased by the use of the developed models.

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Khlid, Ben Hamad. "Fuel cell power conditioning multiphase converter for 1400 VDC megawatts stacks". Thesis, Cape Peninsula University of Technology, 2019. http://hdl.handle.net/20.500.11838/3042.

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Thesis (PhD (Electrical Engineering))--Cape Peninsula University of Technology, 2019
Energy systems based on fossil fuel have demonstrated their abilities to permit economic development. However, with the fast exhaustion of this energy source, the expansion of the world energy demand and concerns over global warming, new energy systems dependent on renewable and other sustainable energy are gaining more interests. It is a fact that future development in the energy sector is founded on the utilisation of renewable and sustainable energy sources. These energy sources can enable the world to meet the double targets of diminishing greenhouse gas emissions and ensuring reliable and cost-effective energy supply. Fuel cells are one of the advanced clean energy technologies to substitute power generation systems based on fossil fuel. They are viewed as reliable and efficient technologies to operate either tied or non-tied to the grid to power applications ranging from domestic, commercial to industrial. Multiple fuel cell stacks can be associated in series and parallel to obtain a fuel cell system with high power up to megawatts. The connection of megawatts fuel cell systems to a utility grid requires that the power condition unit serving as the interface between the fuel cell plant and the grid operates accordingly. Different power conditioning unit topologies can be adopted, this study considers a multilevel inverter. Multilevel inverters are getting more popularity and attractiveness as compared to conventional inverters in high voltage and high-power applications. These inverters are suitable for harmonic mitigation in high-power applications whereby switching devices are unable to function at high switching frequencies. For a given application, the choice of appropriate multilevel topology and its control scheme are not defined and depend on various engineering compromises, however, the most developed multilevel inverter topologies include the Diode Clamped, the Flying Capacitor and the Cascade Full Bridge inverters. On the other hand, a multilevel inverter can be either a three or a five, or a nine level, however, this research focuses on the three-level diode clamped inverters. The aim of this thesis is to model and control a three-level diode clamped inverter for the grid connection of a megawatt fuel cell stack. Besides the grid, the system consists of a 1.54 MW operating at 1400 V DC proton exchange membrane fuel cell stack, a 1.26 MW three-level diode clamped inverter with a nominal voltage of 600 V and an LCL filter which is designed to reduce harmonics and meet the standards such as IEEE 519 and IEC 61000-3-6. The inverter control scheme comprises voltage and current regulators to provide a good power factor and satisfy synchronisation requirements with the grid. The frequency and phase are synchronised with those of the grid through a phase locked loop. The modelling and simulation are performed using Matlab/Simulink. The results show good performance of the developed system with a low total harmonic distortion of about 0.35% for the voltage and 0.19% for the current.

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Książki na temat "Grid Tied Multilevel Inverter"

Chung, Henry S., Yuanbin He, Frede Blaabjerg, Weimin Wu i Min Huang. Principle and Damping Design of LCL/LLCL-Filtered Single-Phase Grid-Tied Inverter. Wiley & Sons, Incorporated, John, 2023.

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Chung, Henry S., Yuanbin He, Frede Blaabjerg, Weimin Wu i Min Huang. Principle and Damping Design of LCL/LLCL-Filtered Single-Phase Grid-Tied Inverter. Wiley & Sons, Incorporated, John, 2023.

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Chung, Henry S., Yuanbin He, Frede Blaabjerg, Weimin Wu i Min Huang. Principle and Damping Design of LCL/LLCL-Filtered Single-Phase Grid-Tied Inverter. Wiley & Sons, Incorporated, John, 2023.

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Chung, Henry S., Yuanbin He, Frede Blaabjerg, Weimin Wu i Min Huang. Principle and Damping Design of LCL/LLCL-Filtered Single-Phase Grid-Tied Inverter. Wiley & Sons, Incorporated, John, 2023.

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Części książek na temat "Grid Tied Multilevel Inverter"

Khan, Mohd Suhail, Mirza Mohammad Shadab, Mohammed Asim i Javed Ahmad. "Modeling and Simulation of Solar PV-Based Grid-Tied Multilevel Inverter". W Lecture Notes in Electrical Engineering, 449–57. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4080-0_43.

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Lim, Ziyou. "Active Neutral-Point-Clamped Inverter". W Advanced Multilevel Converters and Applications in Grid Integration, 275–318. Chichester, UK: John Wiley & Sons, Ltd, 2018. http://dx.doi.org/10.1002/9781119476030.ch14.

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Tiwari, Anish, i Anandita Chowdhury. "Bi-q MSZSI Topology for Grid-Tied Inverter Under Ideal Grid Conditions". W Sustainable Technology and Advanced Computing in Electrical Engineering, 73–82. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-4364-5_7.

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Roomi, Muhammad M. "Z-Source Inverter-Based Fuel Cell Power Generation". W Advanced Multilevel Converters and Applications in Grid Integration, 433–54. Chichester, UK: John Wiley & Sons, Ltd, 2018. http://dx.doi.org/10.1002/9781119476030.ch18.

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Santhiya, R., A. Senthilnathan, V. Kumar Chinnaiyan i R. Nithya Priya. "Grid Connected Multilevel Inverter and MPPT for Photovoltaic System". W Lecture Notes in Electrical Engineering, 201–11. New Delhi: Springer India, 2014. http://dx.doi.org/10.1007/978-81-322-2119-7_21.

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Pandey, Piyush, Saurabh Mani Tripathi, Utkrisht Goswami, Hemant Kumar Verma i Aman Kumar Sriwastava. "MIL, SIL, and PIL Simulations of a Grid-Tied Inverter". W Springer Proceedings in Energy, 657–66. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-6879-1_63.

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Lim, Ziyou. "Three-Phase Seven-Level Three-Cell Lightweight Flying Capacitor Inverter". W Advanced Multilevel Converters and Applications in Grid Integration, 217–50. Chichester, UK: John Wiley & Sons, Ltd, 2018. http://dx.doi.org/10.1002/9781119476030.ch12.

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Lim, Ziyou. "Three-Phase Seven-Level Four-Cell Reduced Flying Capacitor Inverter". W Advanced Multilevel Converters and Applications in Grid Integration, 251–74. Chichester, UK: John Wiley & Sons, Ltd, 2018. http://dx.doi.org/10.1002/9781119476030.ch13.

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Saravanan, K., i C. Sharmeela. "Grid Interactive Level Multiplying Cascaded Multilevel Inverter for Photovoltaic MPPT". W Proceedings of 2nd International Conference on Intelligent Computing and Applications, 683–94. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-1645-5_57.

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Trabelsi, Mohamed, i Haitham Abu-Rub. "Grid Integration of Quasi-Z Source Based PV Multilevel Inverter". W Impedance Source Power Electronic Converters, 362–89. Chichester, UK: John Wiley & Sons, Ltd, 2016. http://dx.doi.org/10.1002/9781119037088.ch19.

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Streszczenia konferencji na temat "Grid Tied Multilevel Inverter"

Coppola, M., P. Guerriero, F. Di Napoli, A. Dannier, S. Daliento, D. Iannuzzi i A. Del Pizzo. "Modulation technique for grid-tied PV multilevel inverter". W 2016 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM). IEEE, 2016. http://dx.doi.org/10.1109/speedam.2016.7525980.

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Vivert, Miguel, Diego Patino, Rafael Diez, Diego Bernal Cobaleda i Marc Cousineau. "Decentralized Controller for a Grid Tied Cascade Multilevel Inverter". W 2019 IEEE 4th Colombian Conference on Automatic Control (CCAC). IEEE, 2019. http://dx.doi.org/10.1109/ccac.2019.8920877.

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Sharma, Deepak, Prabir Ranjan Kasari, Sumit Kumar, Sudhanshu Kumar, Abanishwar Chakraborty i Bikram Das. "A Modified Controller for Solar PV Grid Tied Multilevel Inverter". W 2019 Innovations in Power and Advanced Computing Technologies (i-PACT). IEEE, 2019. http://dx.doi.org/10.1109/i-pact44901.2019.8960094.

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Vazquez, G., P. R. Martinez-Rodriguez, J. M. Sosa, G. Escobar i M. A. Juarez. "Transformerless single-phase multilevel inverter for grid tied photovoltaic systems". W IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society. IEEE, 2014. http://dx.doi.org/10.1109/iecon.2014.7048756.

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Coblaeda, Diego Gerardo Bernal, Miguel Vivert, Rafael Diez Medina, Fredy Ruiz, Diego Patino i Gabriel Perilla. "A current controller for a grid-tied, cascade multilevel inverter". W 2019 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA). IEEE, 2019. http://dx.doi.org/10.1109/pepqa.2019.8851566.

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Sajedi, Shahab, Malabika Basu i Michael Farrell. "New grid-tied cascaded multilevel inverter topology with reduced number of switches". W 2017 52nd International Universities Power Engineering Conference (UPEC). IEEE, 2017. http://dx.doi.org/10.1109/upec.2017.8231983.

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Silva, J., J. Espinoza, D. Sbarbaro, L. Moran, Jaime Rohten i Luis Vaccaro. "Fast MPC Algorithm for a Grid Tied Photovoltaic System based on a Multilevel Inverter". W IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society. IEEE, 2019. http://dx.doi.org/10.1109/iecon.2019.8927053.

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Muftah, Magdi G., Mohamed Salem, Khlid Ben Hamad i Mohamad Kamarol. "Open-loop control of a grid-tied multilevel inverter interfacing a fuel cell stack". W 2021 IEEE International Conference on Environment and Electrical Engineering and 2021 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe). IEEE, 2021. http://dx.doi.org/10.1109/eeeic/icpseurope51590.2021.9584586.

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Devi, B. Gayathri, i M. Mahesh. "A brief survey on different multilevel inverter topologies for grid-tied solar photo voltaic system". W 2017 IEEE International Conference on Smart Energy Grid Engineering (SEGE). IEEE, 2017. http://dx.doi.org/10.1109/sege.2017.8052775.

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Trabelsi, Mohamed, Sertac Bayhan, Haitham Abu-Rub, Lazhar Ben-Brahim i Pericle Zanchetta. "Finite control set model predictive control for grid-tied quasi-Z-source based multilevel inverter". W 2016 IEEE International Conference on Industrial Technology (ICIT). IEEE, 2016. http://dx.doi.org/10.1109/icit.2016.7474768.

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Raporty organizacyjne na temat "Grid Tied Multilevel Inverter"

Granata, Jennifer E., Michael A. Quintana, Coryne Adelle Tasca i Stanley Atcitty. Utility-scale grid-tied PV inverter reliability workshop summary report. Office of Scientific and Technical Information (OSTI), lipiec 2011. http://dx.doi.org/10.2172/1029793.

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