Relevant bibliographies by topics / Microinverter

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Academic literature on the topic 'Microinverter'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 February 2022

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Journal articles on the topic "Microinverter"

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Burbano-Benavides, Donovan Steven, Oscar David Ortiz-Sotelo, Javier Revelo-Fuelagán, and John E. Candelo-Becerra. "Design of an On-Grid Microinverter Control Technique for Managing Active and Reactive Power in a Microgrid." Applied Sciences 11, no. 11 (May 22, 2021): 4765. http://dx.doi.org/10.3390/app11114765.

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This paper presents the design and implementation of an on-grid microinverter control technique for managing active and reactive power based on a dq transformation. The system was implemented in a solar microinverter development kit (Texas Instruments—TMDSSOLARUINVKIT). This microinverter has two stages: DC-DC and DC-AC. The DC-DC stage contains an active clamp flyback converter, where the maximum power point tracking (MPPT) of the solar panel is obtained with a current-based incremental conductance algorithm. The DC-AC stage comprises a dual-buck inverter in which voltage-, current-, and phase-tracking control loops are implemented to control the active and reactive power. These techniques were simulated in MATLAB using the proposed mathematical model and experimentally validated in the solar development kit. The results show that the simulated model behaved similarly to the real system, and the control techniques presented good performance. The maximum power point (MPP) of the solar panel was monitored in the DC-DC stage using a current reference provided by the incremental conductance MPPT algorithm and was regulated by a 2P2Z control. The algorithm is robust against continuous changes in irradiance, as it quickly follows the ideal power and continually operates at a point close to the MPP. In addition, the active and reactive power control in the DC-AC stage enables the microinverter to supply the maximum active power. Moreover, the microinverter supplies reactive power according to a defined reference and within the established limits. The proposed mathematical model of the microinverter can be used to design new control techniques and other microinverter topologies. In addition, this active and reactive power-control technique can be implemented in low-power and low-cost microinverters to successfully maintain power quality in small microgrids.
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Shawky, Ahmed, Mahrous Ahmed, Mohamed Orabi, and Abdelali El Aroudi. "Classification of Three-Phase Grid-Tied Microinverters in Photovoltaic Applications." Energies 13, no. 11 (June 7, 2020): 2929. http://dx.doi.org/10.3390/en13112929.

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Microinverters are an essential part of the photovoltaic (PV) industry with significant exponential prevalence in new PV module architectures. However, electrolyte capacitors used to decouple double line frequency make the single-phase microinverters topologies the slightest unit in this promising industry. Three-phase microinverter topologies are the new trend in this industry because they do not have double-line frequency problems and they do not need the use of electrolyte capacitors. Moreover, these topologies can provide additional features such as four-wire operation. This paper presents a detailed discussion of the strong points of three-phase microinverters compared to single-phase counterparts. The developed topologies of three-phase microinverters are presented and evaluated based on a new classification based on the simplest topologies among dozens of existing inverters. Moreover, the paper considers the required standardized features of PV, grid, and the microinverter topology. These features have been classified as mandatory and essential. Examples of the considered features for classifications are Distributed Maximum Power Point Tracking (DMPPT), voltage boosting gain, and four-wire operation. The developed classification is used to identify the merits and demerits of the classified inverter topologies. Finally, a recommendation is given based on the classified features, chosen inverter topologies, and associated features.
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Lopez-Santos, Oswaldo, Sebastián Tilaguy-Lezama, Sandra Patricia Rico-Ramírez, and Luis Darío Cortes-Torres. "Operation of a Photovoltaic Microinverter as Active Power Filter using the single phase P-Q Theory and Sliding Mode Control." Ingeniería 22, no. 2 (May 5, 2017): 254. http://dx.doi.org/10.14483/udistrital.jour.reving.2017.2.a06.

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Context: Microinverters are widely used in modular photovoltaic installations but its operation with reduced power is limited to inject real power into the grid. One way to optimize the use of microinverters consist of providing them the Active Power Filtering (APF) capability, which allows its use as both distributed generation and compensation unit even under unfavorable conditions of insolation. With this approach, the output stage of the microinverter can provide reactive and distortive components of power in order to compensate power quality defects of a localized load.Method: This paper proposes a non-linear control strategy to integrate the APF function in a single-phase two-stage photovoltaic microinverter. The proposal involves the use of the single-phase P-Q theory to generate the current reference, sliding mode control to achieve a robust tracking of that reference and linear robust control to maintain the power balance regulating the DC-link voltage of the microinverter. The proposed control does not require the use of low-pass filters and in turn uses a recursive average computation improving the general performance of the system.Results: The theoretical approach is validated by means of simulation results in which appropriate levels of harmonic distortion are obtained in the grid-side current for different load types and power levels. The robustness of the control system is tested by applying disturbances in the harmonic content of the load current and its power level obtaining an appropriate dynamic performance adapted to the demands of the application.Conclusions: The main advantage of this proposal is the possibility to add the active filter function to coventional microinverters extending its capability to power conditioning only integrating some algorithms. A simple design method to ensure reliability, robustness and high power quality is detailed.Language: English
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Abbood, Hayder D., and Andrea Benigni. "Data-Driven Modeling of a Commercial Photovoltaic Microinverter." Modelling and Simulation in Engineering 2018 (April 2, 2018): 1–11. http://dx.doi.org/10.1155/2018/5280681.

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We present a data-driven modeling (DDM) approach for static modeling of commercial photovoltaic (PV) microinverters. The proposed modeling approach handles all possible microinverter operating modes, including burst mode. No prior knowledge of internal components, structure, and control algorithm is assumed in developing the model. The approach is based on Artificial Neural Network (ANN) and Fast Fourier Transform (FFT). To generate the data used to train the model, a Power Hardware in the Loop (PHIL) approach is applied. Instantaneous inputs-outputs data are collected from the terminals of a commercial PV microinverter at time domain. Then, the collected data are converted to the frequency domain using Fast Fourier Transform (FFT). The ANNs that are the core of the DDM are developed in frequency domain. The outputs of the ANNs are then converted back to time domain for validation and use in system level simulation. The comparison between measured and simulated data validates the performance of the presented approach.
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Kawa, Adam, Adam Penczek, and Stanisław Piróg. "DC-DC boost-flyback converter functioning as input stage for one phase low power grid-connected inverter." Archives of Electrical Engineering 63, no. 3 (September 1, 2014): 393–407. http://dx.doi.org/10.2478/aee-2014-0029.

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Abstract The paper treats about main problems of one phase DC-AC microinverters that allow single solar cell to be joined with the grid. One of the issues is to achieve high voltage gain with high efficiency in DC circuit, which is necessary for proper operation of inverter. The operating principles, results of practical implementation and investigations on boost-flyback converter, which meets mentioned demands, are presented. (high step-up DC-DC boost-flyback converter for single phase grid microinverter)
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Razi, A., M. Nabil Hidayat, and M. N. Seroji. "Microinverter Topology based Single-stage Grid-connected Photovoltaic System: A Review." Indonesian Journal of Electrical Engineering and Computer Science 11, no. 2 (August 1, 2018): 645. http://dx.doi.org/10.11591/ijeecs.v11.i2.pp645-651.

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This paper discussed the topology development of a single-stage microinverter in grid-connected PV system. In general, the microinverter topologies can be categorized into four type of topologies: 1) Flyback inverter, 2) Double-boost inverter, 3) Derived zeta-cuk configuration and 4) Buck-boost inverter. Flyback configuration is widely used for single-stage microinverter which offers protection between solar panel and utility grid. However due to the bulkiness of the transformer, new arrangement circuit employ the Half-Bridge topology with film capacitor and microcontroller provide a good room for research and future developments to obtain greater efficiency and compact design of single-stage microinverter grid-connected PV system. Plus, there are several characteristics need to be taken care for future development of the microinverter technology.
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Razi, A., M. Nabil Hidayat, M. N. Seroji, and S. Z. Mohammad Noor. "A novel single-stage PWM microinverter topology using two-power switches." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 2 (June 1, 2020): 792. http://dx.doi.org/10.11591/ijpeds.v11.i2.pp792-800.

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This paper presents a novel single-stage Microinverter topology using only two-power switches. The number of components count are directly proportional to the power losses, weight, cost and complexity of the design. Nowadays, conventional Microinverter without transformer having minimum of six power switches, while only three power switches involved in a Microinverter structure with the presence of a transformer. Thus, this paper proposed a novel Microinverter topology with only two-power switches to convert DC-voltage from Photovoltaic (PV) module to an AC-output. Modes of operation and current flow during each cycle are being explained. Variation of modulation index, irradiance and temperature of the PV module, the switching frequency and harmonic content of the proposed Microinverter are being analysed. A simulated model of Microinverter topology, employed only two power switches with a standard Unipolar Sinusoidal Pulse Width Modulation (SPWM) having 0.85% harmonic percentage; able to inject current to the load; have been successfully built and demonstrated through simulation based on MATLAB/Simulink, thus provide theoretical validation for further research.
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Kahawish Hassan, Turki, and Enaam Abdul Khaliq Ali. "TRANSFORMERLESS PHOTOVOLTAIC MICROINVERTER." Journal of Engineering and Sustainable Development 22, no. 02 (March 1, 2018): 41–55. http://dx.doi.org/10.31272/jeasd.2018.2.66.

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Bielskis, Edvardas, Algirdas Baskys, and Gediminas Valiulis. "Controller for the Grid-Connected Microinverter Output Current Tracking." Symmetry 12, no. 1 (January 7, 2020): 112. http://dx.doi.org/10.3390/sym12010112.

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The modification of the proportional–integral (PI) controller with the variable proportional constant for tracking of the grid-connected photovoltaic microinverter output current has been proposed. The obtained results show that in the case when the proportional constant of the PI controller varies in time according to the appropriate law, the microinverter output current sinus shape distortions decrease as compared to the case when the ordinary PI controller is used. The operation of the microinverter with the proposed controller was investigated for the cases when the electrical grid voltage sinus shape is not distorted and when it is distorted by the higher harmonics.
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Barros, Luis A. M., Mohamed Tanta, Tiago J. C. Sousa, Joao L. Afonso, and J. G. Pinto. "New Multifunctional Isolated Microinverter with Integrated Energy Storage System for PV Applications." Energies 13, no. 15 (August 4, 2020): 4016. http://dx.doi.org/10.3390/en13154016.

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This paper proposes a novel multifunctional isolated microinverter which is able to extract the maximum available power from a solar photovoltaic module and inject it into the power grid, while simultaneously charging a battery energy storage system (BESS). The proposed microinverter integrates a novel DC–DC power converter and a conventional DC–AC power converter. The DC–DC power converter is able to send electrical energy to the secondary side of a high-frequency transformer and to the BESS, using only two power switches. Throughout this paper, the converter topology, the operation modes, the control algorithms, and the development of a laboratory prototype of the proposed microinverter are described in detail. Moreover, simulation and experimental results are presented to demonstrate the feasibility of the proposed solution.
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Dissertations / Theses on the topic "Microinverter"

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Yogeswaran, Kesavan. "A stacked full-bridge microinverter topology for photovoltaic applications." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/85805.

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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2012.
Title as it appears in MIT degrees awarded program, September 19, 2012: A new topology for high-efficiency solar microinverters Cataloged from PDF version of thesis.
Includes bibliographical references (pages 95-96).
Previous work has been done to develop a microinverter for solar photovoltaic applications consisting of a high-frequency series resonant inverter and transformer section connected to a a cycloconverter that modulates the resonant current into a single-phase 240 VRMS utility line. This thesis presents a new stacked full-bridge topology that improves upon the previous high-frequency inverter section. By utilizing new operating modes to reduce the reliance on frequency control and allowing for the use of lower blocking voltage transistors, the operating frequency range of the HF inverter is reduced and efficiency is increased, especially at low output powers and lower portions of the line cycle. The design of an experimental prototype to test the stacked full-bridge HF inverter topology is presented along with test results that demonstrate the success of the topology. Future improvements to increase performance are also suggested.
by Kesavan Yogeswaran.
M. Eng.
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Fonkwe, Fongang Edwin. "Reactive power support capability of flyback microinverter with pseudo-dc link." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/101794.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2015.
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 101-102).
The flyback micro-inverter with a pseudo-dc link has traditionally been used for injecting only active power in to the power distribution network. In this thesis, a new approach will be proposed to control the micro-inverter to supply reactive power to the grid which is important for grid voltage support. Circuit models and mathematical analyses are developed to explain underlying issues such as harmonic distortion, and power losses, which can limit the reactive power support capability. A novel current decoupling circuit is proposed to effectively mitigate zero crossing distortion. Simulations and experimental results are provided to support the theoretical propositions.
by Edwin Fonkwe Fongang.
S.M.
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Hossain, Mohammad Akram. "Thermal Characteristics of Microinverters on Dual-axis Trackers." Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1396888841.

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Dominic, Jason. "Comparison and Design of High Efficiency Microinverters for Photovoltaic Applications." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/78045.

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With the decrease in availability of non-renewable energy sources coupled with the increase in the amount of energy required for the operation of personal electronic devices there has been an increased focus on developing systems that take advantage of renewable energy sources. Renewal energy sources such as photovoltaic (PV) panels have become more popular due to recent developments in PV panel manufacturing that decreases material costs and improves energy harvesting efficiency. Since PV sources are DC sources power conversion stages have to be used in order to interface this power to the existing electrical utility system. The structure of large scale PV systems usually consists of several PV panels connected in series to achieve a high input source voltage that can be fed into a high power centralized DC-AC inverter. The drawback to this approach is that when the PV panels are subjected to less than ideal conditions. If a single PV panel is subjected to drastically less solar irradiation during cloud conditions, then its output power will drop dramatically. Since this panel is series connected with the other PV panels, their current output is also dragged low decreasing the power output of the system. Algorithms that have the power converter operate at different input conditions allow the system to operate at a maximum power point (MPP), however this only allows the system to operate at a higher power point and not the true MPP. To get around this limitation a new PV system implementation was created by giving each panel its own DC-AC power conversion system. This configuration gives each panel the ability to operate at its own MPP increasing the total system energy harvest. Another advantage of the single panel DC-AC microinverter power conversion stage is that the outputs are parallel connected to the utility grid easily allowing the ability to expand the system without having to shut down the entire system. The most prevalent implementation of the microinverter consists of a single power converter that uses the PV low voltage DC and outputs high voltage AC. In order to ensure that the double line AC ripple does not propagate to the PV panel a large bank of electrolytic capacitors are used to buffer the ripple. There is concern that the electrolytic capacitor will degrade over time and affect the system efficiency. To get around having to use electrolytic capacitors a two stage microinverter has been proposed. The two stage microinverter consists of a DC-DC converter that steps up the low DC voltage of the PV panel to high voltage DC and the second stage is a DC-AC inverter that takes the high voltage DC and converts it to high voltage AC. There is a capacitor that connects the two power converter stages called the DC link capacitor which can buffer the double line energy ripple without using electrolytic capacitors. This thesis focuses on the review of several DC-AC inverter topologies suitable for use in PV microinverter systems. Operation capabilities such as common mode noise and efficiency are compared. The main focus of the review is to determine the optimal DC-AC inverter using the performance metrics of cost, efficiency and common mode performance. A 250 W prototype is built for each inverter topology to verify its performance and operation.
Master of Science
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Schenkel, Gabriela. "Monitoramento e análise de um sistema fotovoltaico conectado à rede com uso de microinversor." Universidade do Vale do Rio dos Sinos, 2015. http://www.repositorio.jesuita.org.br/handle/UNISINOS/4909.

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CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Os sistemas fotovoltaicos conectados à rede tem como finalidade a conversão da energia solar em energia elétrica. No Brasil, recentemente foi dado o primeiro passo efetivo com a publicação pela ANEEL da Resolução Normativa n° 482. Esta resolução, publicada em 17 de abril de 2012, possibilita à um consumidor doméstico e comercial possuir um sistema de microgeração de energia (hidráulica, solar, eólica, biomassa ou cogeração qualificada) conectado à rede elétrica e fazer compensação de energia. Neste trabalho foi instalado em caráter experimental, no Laboratório de Energias Renováveis da Unisinos, um sistema fotovoltaico conectado à rede com uso de um modelo de microinversor, e buscou-se por meio desta instalação e do monitoramento, analisar o comportamento elétrico e energético do sistema. O sistema é composto por um módulo monocristalino LG255S1C de 255 Wp conectado a um microinversor ENPHASE M215 de 215 W. O período de monitoramento foi de 1° de agosto até 20 de dezembro de 2014. Uma central de aquisição de dados Agilent HP 34970A foi empregada para coletar dados de irradiância no plano do gerador fotovoltaico, corrente e tensão na entrada e saída do microinversor, temperatura de uma célula FV no centro do módulo fotovoltaico e temperatura no dissipador do microinversor. Também foi utilizado como medidor o analisador de energia Fluke 43B, que coleta os dados de potência ativa, potência reativa e potência aparente injetada na rede elétrica pelo sistema. Índices de qualidade de energia como a distorção harmônica total de corrente e fator de deslocamento também foram medidos. A eficiência média diária máxima, considerando a incerteza, medida no microinversor empregado foi de 95,18 % e é semelhante aos valores de eficiência média diária dos microinversores de primeira e segunda geração. O sistema fotovoltaico monitorado com o uso do microinversor atingiu o valor máximo de desempenho global de 0,93. A produção de energia máxima diária em corrente alternada foi de 1,49 kWh. Estima-se, levando em consideração este valor, que a produção mensal pode ser de até 44,7 kWh. Isto significa uma redução de 58 % no consumo de energia em uma residência, levando em consideração o custo de disponibilidade e o sistema instalado em uma residência com consumo médio mensal da região nordeste que é de 120 kWh.
Photovoltaic grid-connected systems aims the conversion of solar energy into electrical energy. In Brazil, was recently given the first effective step with the publication by ANEEL Normative Resolution No. 482. This resolution published on 17 th April, 2012, enables domestic and commercial consumers have an energy microgeneration system (hydro, solar, wind, biomass or qualified cogeneration) connected to mains power and make compensation. In this work was mounted on an experimental character, in the Renewable Energy Laboratory of Unisinos, a photovoltaic grid-connected system that uses a microinverter model, and through this installation and monitoring, analyse the electrical and energetical behavior of the system. The system consists of a 255 Wp LG255S1C monocrystalline module, connected to a 215 W ENPHASE M215 microinverter. The monitoring period was 1 st August to 20 th December, 2014. A central acquisition of Agilent HP 34970A data was used to collect data irradiance in the plane of the PV array, current and voltage at the input and output of microinverter, temperature of a PV cell in the center of the PV module and the microinverter sink. It was also used as a measuring the energy analyzer Fluke 43B, which collects the data of active power, reactive power and apparent power injected into the grid by the system. Power quality indices as the total harmonic current distortion and displacement factor were also measured. The maximum daily average efficiency, considering the uncertainty, measured on the employed microinverter was 95.18 % and is similar than the daily average efficiency values of microinverters of first and second generation. The photovoltaic system monitored using the microinverter peaked overall performance of 0.93. The production maximum daily energy into alternating current was 1.49 kWh. It is estimated taking into account the value that the monthly production can achieved 44.7 kWh. This means a reduction of 58 % in the consumption of a residence considering the availability cost and that the system is installed in a residence with the northest comsumption whose the average monthly consumption is 120.00 kWh.
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Blair, Daniel P. "SolarBridge Technologies: Entrepreneurship in the Solar Inverter Industry." Case Western Reserve University School of Graduate Studies / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=case1301506263.

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Kiddoo, Cameron. "Energy Harvesting from Exercise Machines: Comparative Study of EHFEM Performance with DC-DC Converters and Dissipative Overvoltage Protection Circuit." DigitalCommons@CalPoly, 2017. https://digitalcommons.calpoly.edu/theses/1732.

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Energy Harvesting from Exercise Machines (EHFEM) is an ongoing project pursuing alternate forms of sustainable energy for Cal Poly State University. The EHFEM project seeks to acquire user-generated DC power from exercise machines and sell that energy back to the local grid as AC power. The end goal of the EHFEM project aims to integrate a final design with existing elliptical fitness trainers for student and faculty use in Cal Poly’s Recreational Center. This report examines whether including the DC-DC converter in the EHFEM setup produces AC power to the electric grid more efficiently and consistently than an EHFEM system that excludes a DC-DC converter. The project integrates an overvoltage protection circuit, a DC-DC converter, and a DC-AC microinverter with an available elliptical trainer modified to include an energy converting circuit. The initial expectation was that a DC-DC converter would increase, when averaged over time, the overall energy conversion efficiency of the EHFEM system, and provide a stable voltage and current level for the microinverter to convert DC power into AC power. In actuality, while including a DC-DC converter in a test setup allows the EHFEM system to function with less frequent interruptions, this occurs at the cost of lower efficiency. Testing demonstrates the EHFEM project can convert user-generated DC mechanical power into usable AC electrical power. Retrofitting existing equipment with the EHFEM project can reduce Cal Poly’s energy cost.
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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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Knabben, Gustavo Carlos. "Microinversor fotovoltaico não isolado de dois estágios." reponame:Repositório Institucional da UFSC, 2017. https://repositorio.ufsc.br/xmlui/handle/123456789/178588.

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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Elétrica, 2017.
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Esta dissertação de mestrado apresenta o procedimento utilizado no projeto e construção de um protótipo de microinversor fotovoltaico, capaz de processar energia de um módulo fotovoltaico de silício cristalino de até 250 W de potência e injetá-la na rede elétrica com 220 V de valor eficaz de tensão e 60 Hz de frequência. O trabalho compreende revisão bibliográfica em microinversores comerciais, normas para conexão à rede elétrica, caracterização de geradores fotovoltaicos, topologias aplicadas a microinversores e influência das correntes de modo comum na operação desses equipamentos. Optou-se por processar a energia em dois estágios de conversão. O primeiro, cc-cc, é composto por um conversor Boost com célula de ganho. O segundo, cc-ca, principal foco desta dissertação, é o conversor em ponte completa com modulação dois níveis. A estratégia de controle é baseada em compensação da corrente injetada na rede elétrica, com imposição, por PLL, de uma forma de onda senoidal em fase com a tensão; regulação do barramento cc principal; técnica de MPPT; método de anti-ilhamento; partida suave de todo o sistema; algoritmos de proteção; e desacoplamento dos estágios cc-cc e cc-ca por filtragem ativa. A experimentação do sistema projetado e construído contou com resultados satisfatórios e de acordo com teoria e simulação.

Abstract : This Master's Thesis presents the design and construction procedure of a photovoltaic (PV) micro-inverter prototype capable of absorbing energy from a 250 W crystalline silicon PV module and injecting into a 220 V / 60 Hz utility grid. The work includes a literature review on commercial micro-inverters, standards for connectins to grid, characterization of photovoltaic generators, topologies applied to microinverters and influence of common mode currents in the operation of these equipments. Two stages of conversion were choosen to process the energy. The first, dc-dc, is composed by a Boost converter with gain cell. The second, dc-ac, main focus of this work, is the Full-Bridge converter with two level sinusoidal modulation. The control strategy is based on current compensation; dc link voltage controlling; PLL; MPPT; anti-islanding method; soft start of the entire system; protection algorithms; and decoupling of the dc-dc and dc-ac stages by active filtering. The experimentation of the designed and constructed system reached satisfactory results, according to theory and simulation.
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Gu, Bin. "Power Converter and Control Design for High-Efficiency Electrolyte-Free Microinverters." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/25236.

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Microinverter has become a new trend for photovoltaic (PV) grid-tie systems due to its advantages which include greater energy harvest, simplified system installation, enhanced safety, and flexible expansion. Since an individual microinverter system is typically attached to the back of a PV module, it is desirable that it has a long lifespan that can match PV modules, which routinely warrant 25 years of operation. In order to increase the life expectancy and improve the long-term reliability, electrolytic capacitors must be avoided in microinverters because they have been identified as an unreliable component. One solution to avoid electrolytic capacitors in microinverters is using a two-stage architecture, where the high voltage direct current (DC) bus can work as a double line ripple buffer. For two-stage electrolyte-free microinverters, a high boost ratio dc-dc converter is required to increase the low PV module voltage to a high DC bus voltage required to run the inverter at the second stage. New high boost ratio dc-dc converter topologies using the hybrid transformer concept are presented in this dissertation. The proposed converters have improved magnetic and device utilization. Combine these features with the converter's reduced switching losses which results in a low cost, simple structure system with high efficiency. Using the California Energy Commission (CEC) efficiency standards a 250 W prototype was tested achieving an overall system efficiency of 97.3%. The power inversion stage of electrolyte-free microinverters requires a high efficiency grid-tie inverter. A transformerless inverter topology with low electro-magnetic interference (EMI) and leakage current is presented. It has the ability to use modern superjunction MOSFETs in conjunction with zero-reverse-recovery silicon carbide (SiC) diodes to achieve ultrahigh efficiency. The performance of the topology was experimentally verified with a tested CEC efficiency of 98.6%. Due to the relatively low energy density of film capacitors compared to electrolytic counterparts, less capacitance is used on the DC bus in order to lower the cost and reduce the volume of electrolyte-free microinverters. The reduced capacitance leads to high double line ripple voltage oscillation on DC bus. If the double line oscillation propagates back into the PV module, the maximum power point tracking (MPPT) performance would be compromised. A control method which prevents the double line oscillation from going to the PV modules, thus improving the MPPT performance was proposed. Finally, a control technique using a single microcontroller with low sampling frequency was presented to effectively eliminate electrolyte capacitors in two-stage microinverters without any added penalties. The effectiveness of this control technique was validated both by simulation and experimental results.
Ph. D.
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Book chapters on the topic "Microinverter"

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Gabbar, Hossam A., Jason Runge, and Khairy Sayed. "Microinverter Systems For Energy Conservation In Infrastructures." In Energy Conservation in Residential, Commercial, and Industrial Facilities, 125–202. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2018. http://dx.doi.org/10.1002/9781119422099.ch5.

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Lopez-Santos, Oswaldo, Luis Cortes-Torres, and Sebastián Tilaguy-Lezama. "Discrete Time Nested-Loop Controller for the Output Stage of a Photovoltaic Microinverter." In Communications in Computer and Information Science, 320–31. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-50880-1_28.

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Deline, Chris. "Inverters, Power Optimizers, and Microinverters." In Photovoltaic Solar Energy, 530–38. Chichester, UK: John Wiley & Sons, Ltd, 2017. http://dx.doi.org/10.1002/9781118927496.ch47.

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Scotta, Isabella Cristina, Gabriela Moreira Ribeiro, Wellington Maidana, and Vicente Leite. "Over-Voltage Protection for Pico-Hydro Generation Using PV Microinverters." In Smart Cities, 25–37. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-38889-8_3.

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"2.4 kW DC Grid-Tied PV System with Microinverters." In Photovoltaic Laboratory, 291–342. CRC Press, 2018. http://dx.doi.org/10.1201/9781315222417-16.

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Ruchira, S. K. Sinha, and R. N. Patel. "Techno-Commercial Analysis of Microinverters as a Future Technology in Solar PV Power Generation." In Handbook of Renewable Energy Technology & Systems, 313–37. WORLD SCIENTIFIC (EUROPE), 2021. http://dx.doi.org/10.1142/9781786349033_0012.

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Conference papers on the topic "Microinverter"

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Mazumder, Sudip K., Abhijit Kulkarni, Ankit Gupta, Debanjan Chatterjee, and Nikhil Kumar. "Grid-Connected GaN Solar Microinverter." In 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC). IEEE, 2018. http://dx.doi.org/10.1109/pvsc.2018.8548020.

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Quiroz, Jimmy E., Sigifredo Gonzalez, and Joshua S. Stein. "PV microinverter testbed for interoperability." In 2013 IEEE 39th Photovoltaic Specialists Conference (PVSC). IEEE, 2013. http://dx.doi.org/10.1109/pvsc.2013.6744943.

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Erickson, Robert W., and Aaron P. Rogers. "A Microinverter for Building-Integrated Photovoltaics." In 2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2009. http://dx.doi.org/10.1109/apec.2009.4802771.

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Lopez, Diana, Freddy Flores-Bahamonde, Hugues Renaudineau, and Samir Kouro. "Double voltage step-up photovoltaic microinverter." In 2017 IEEE International Conference on Industrial Technology (ICIT). IEEE, 2017. http://dx.doi.org/10.1109/icit.2017.7913265.

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Nezamuddin, Omar, Jonah Crespo, and Euzeli C. dos Santos. "Design of a highly efficient microinverter." In 2017 IEEE 44th Photovoltaic Specialists Conference (PVSC). IEEE, 2017. http://dx.doi.org/10.1109/pvsc.2017.8366813.

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Nezamuddin, Omar, Jonah Crespo, and Euzeli C. dos Santos. "Design of a highly efficient microinverter." In 2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC). IEEE, 2016. http://dx.doi.org/10.1109/pvsc.2016.7750310.

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Renaudineau, H., S. Kouro, K. Schaible, and M. Zehelein. "Flyback-based sub-module PV microinverter." In 2016 18th European Conference on Power Electronics and Applications (EPE'16 ECCE Europe). IEEE, 2016. http://dx.doi.org/10.1109/epe.2016.7695427.

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Cagnini, Paulo R., Luiz H. Meneghetti, Victor E. S. Barbosa, Emerson G. Carati, Carlos M. Stein, Zeno L. I. Nadal, Jean M. S. Lafay, Jean Patric da Costa, and Rafael Cardoso. "Microinverter with reduced number of semiconductor switches." In 2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference (COBEP/SPEC). IEEE, 2019. http://dx.doi.org/10.1109/cobep/spec44138.2019.9065517.

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Elrayyah, A., Y. Sozer, I. Husain, and M. Elbuluk. "Power flow control in a microinverter based microgrid." In 2012 IEEE Applied Power Electronics Conference and Exposition - APEC 2012. IEEE, 2012. http://dx.doi.org/10.1109/apec.2012.6166087.

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Alluhaybi, Khalil, Xi Chen, and Issa Batarseh. "A Grid Connected Photovoltaic Microinverter with Integrated Battery." In IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society. IEEE, 2018. http://dx.doi.org/10.1109/iecon.2018.8591658.

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Reports on the topic "Microinverter"

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Quiroz, Jimmy Edward, Sigifredo Gonzalez, Bruce Hardison King, Daniel Riley, Jay Tillay Johnson, and Joshua Stein. Photovoltaic Microinverter Testbed for Multiple Device Interoperability. Office of Scientific and Technical Information (OSTI), November 2014. http://dx.doi.org/10.2172/1490540.

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Bellus, Daniel R., and Jeffrey A. Ely. Cascaded Microinverter PV System for Reduced Cost. Office of Scientific and Technical Information (OSTI), April 2013. http://dx.doi.org/10.2172/1076853.

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

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Riley, Daniel M., Clifford W. Hansen, and Michaela Farr. A Performance Model for Photovoltaic Modules with Integrated Microinverters. Office of Scientific and Technical Information (OSTI), January 2015. http://dx.doi.org/10.2172/1504111.

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Fierro, Andy, Ken Le, David Sanabria, Ross Guttromson, Matthew Halligan, and Jane Lehr. Effects of EMP Testing on Residential DC/AC Microinverters. Office of Scientific and Technical Information (OSTI), September 2020. http://dx.doi.org/10.2172/1670521.

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