No Blog Eletrônica de Potência você encontrará informações sobre teses,artigos,seminarios,congressos,tecnologias,cursos,sobre eletrônica potência. “TEMOS O DESTINO QUE MERECEMOS. O NOSSO DESTINO ESTA DE ACORDO COM OS NOSSOS MERITOS” ALBERT EINSTEIN. Imagination is more important than knowledge, for knowledge is limited while imagination embraces the entire world. EL FUTURO SE CONSTRUYE HOY,EL SUCESSO NO ES FRUTO DE LA CASUALIDAD,SE HUMILDE ,APRENDE SIEMPRE CADA DIA.
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domingo, 6 de outubro de 2019
Analysis and Modeling of Transformerless Photovoltaic Inverter Systems Kerekes, Tamas Faculty of Engineering, Science & Medicine at Aalborg University DENMARK
Analysis and Modeling of Transformerless Photovoltaic Inverter Systems Kerekes, Tamas Faculty of Engineering, Science & Medicine at Aalborg University DENMARK
Dissertation submitted to the Faculty of Engineering, Science & Medicine at Aalborg University in partial fulfillment of the require-ments for the degree of Doctor of Philosophy in Electrical Engineering
Preface
This thesis is written in the frame of two research projects: the first, entitled “Transformerlose solcelle invertere”, was financially supported by the Eltra PSO-F&U contract nr. 5780 signed between Aalborg University and Energinet in cooperation with Powerlynx A/S, now Danfoss Solar A/S. The second part of the research, entitled “Electrical energy conversion and condition-ECON2”, was supported by the EU framework entitled “Marie Curie Host Fellowships for Early Stage Researcher Train-ing”, financially supported by the EC Contract MEST-CT-2004-504243. Acknowledgements are given to Aalborg University and the above mentioned institu-tions for their financial support. The research was carried out under the supervision of Professor Remus Teodores-cu from Institute of Energy Technology (IET) at Aalborg University. My deepest gratitude goes to my supervisor for his guidance and professional support during the elaboration of the work done in this thesis. I would like to express my sincere thanks to Dr. Christian Klumpner and Dr. Mark Sumner for their guidance and support during my one-year stay at Nottingham University. I’m also grateful to Dr. Marco Liserre from Politecnico di Bari for his kindness and professional guidance during my six month stay at the Dipartimento di Elettrotecnica ed Elettronica. I would also like to thank Uffe Borup, from Danfoss Solar A/S, for participating in the steering meetings and for his active support. I want to thank to all my colleagues from Institute of Energy Technology for their friendly companionship which guided me through life at Aalborg University. Special thanks go to Dr. Pedro Rodriguez and Professor Vassilios Agelidis for their un-selfish help and moral support, during their stay at IET. Also many thanks to all my fellow PhD students, who assisted me many times and gave me support in different ways. In particular, I thank to Dezső Séra, Mihai Ciobotaru and Máthé László for their friendly help and encouragement. I would also like to thank Gerardo Vazquez from Universitat Politecnica de Catalonya for sharing his experience and time with me during his visit at IET. And, last but not least, I want to express my deepest gratitude to my wife Erzsébet Kerekes and to my entire family in Romania for the substantial and conti-nuous support which I have received during the elaboration and finalization of this work. Tamás Kerekes August 2009; Aalborg
LINK:https://vbn.aau.dk/ws/portalfiles/portal/123201790/tamas_kerekes_no_publications.pdf
Analysis of Leakage Current Elimination in Single Phase Transformerless Inverter for Grid-Tied Photovoltaic Applications Indira , Venmathi Mahendran Research Scholar, Dept of EEE, Associate Professor, Dept of EEE St.Joseph’s College of Engineering, Chennai, Tamilnadu, India
Transformerless Inverter for Grid-Tied Photovoltaic Applications Indira D1, Venmathi Mahendran2 1Research Scholar, Dept of EEE, 2Associate Professor, Dept of EEE St.Joseph’s College of Engineering, Chennai, Tamilnadu, India.
Abstract:
In photovoltaic (PV) application, it is possible to remove the transformer from the PV system in order to reduce size, losses, and cost and improve the efficiency. Due to the characteristics of low cost and high efficiency, the transformerless PV gridconnected inverters have been popularized in the application of solar electric generation system in residential market. Unfortunately, presence of the parasitic capacitor between the panel’s metal frame and cells causes the leakage current issue. The leakage current increases current harmonics injected into the utility grid, the radiated, conducted EMI, and losses. Eliminating the leakage current is one of the most important issues for transformerless single-phase photovoltaic (PV) systems. This paper focuses on analysis of leakage current elimination in single-phase transformerless inverter for PV applications. A simple unipolar Sinusoidal Pulse-Width Modulation (SPWM) technique is used to modulate the inverter to minimize the switching loss, output current ripple, and the filter requirements.The main benefits of the proposed inverter are (1) The neutral of the grid is directly connected to the negative terminal of the PV panel, so the leakage current is eliminated, (2) low cost, (3) its compact size, (4) flexible grounding configuration, (5) capability of reactive power flow, and (6) high efficiency. A complete description of the operating principle and analysis of the proposed inverter are presented and simulation results are verified.
Keywords— Charge Pump Circuit, Grid Connected Inverter, Leakage Current Elimination, Photovoltaic, Transformerless Inverter, common mode voltage, parasitic capacitor, sinusoidal pulse width modulation, SPWM.
LINK
http://oaji.net/articles/2017/1992-1537360621.pdf
sexta-feira, 4 de outubro de 2019
Designing a Solar PV System to Power a SinglePhase Distribution System Ana Guerra Vega University of Arkansas, Fayetteville
Designing a Solar PV System to Power a SinglePhase Distribution System Ana Guerra Vega University of Arkansas, Fayetteville
A thesis submitted to the Honors College in partial fulfillment of the requirements for the degree of Honors Bachelor of Science in Electrical Engineering
ABSTRACT
Over the last decade, the costs of PV system components have dropped more than 70%. Additionally, green energy incentives like the 30% tax credit have been pushed forward. PV solar systems have become accessible to the general public. Companies are pledging to reduce their carbon emissions. As part of their green initiative, the City of Fayetteville has requested a feasibility study for a PV system to be installed on the rooftop of the Facilities Management building, 115 S. Church Ave, Fayetteville, AR, 72701. This thesis shows the design process of this PV system and the return on investment estimation. While the system would not be expected to generate large revenue, for the purpose of carbon emission reduction it is feasible.
FULL TEXT VIEW
https://scholarworks.uark.edu/cgi/viewcontent.cgi?article=1068&context=eleguht
sábado, 28 de setembro de 2019
ICT&I reivindicam a continuidade dos incentivos fiscais concedidos pela Lei de Informática
LINK ORIGINAL: http://www.fpmciencia.org.br/
sexta-feira, 27 de setembro de 2019
Seminário Mecanismos de Qualidade no Setor Fotovoltaico MECANISMOS DE QUALIDADE NO SETOR FOTOVOLTAICO 10 agosto de 2018 9h00 às 17h00 Auditório do IEE/USP-BRASIL
MANHA
TARDE
Foi uma grande satisfação ter participado em este brilhante evento a qualidade dos palestrantes e o conteúdo dos temas foi excelente este tema esta vigente cada dia toda vez que o setor fotovoltaico cresce cada dia no BRASIL.
MECANISMOS DE QUALIDADE NO SETOR FOTOVOLTAICO 10 agosto de 2018 9h00 às 17h00 Auditório do IEE/USP - Av. Prof. Luciano Gualberto, 1.289 - Cidade Universitária, São Paulo
O Seminário discutiu questões estruturais que contribuem para promover a qualidade nas instalações fotovoltaicas. Ele será baseado no conceito Quality Infrastructure da Agência Internacional de Energias Renováveis (IRENA) que envolve três mecanismos, que são:
a) Normas e Regulamentação;
b) Certificação de Produtos;
c) Certificação de Pessoas
Os palestrantes convidados são renomados atores chave do Setor Fotovoltaico incluindo a participação internacional do diretor da certificadora americana NABCEP, Shawn O'Brien. O público alvo do evento foi composto por stakeholders e agentes do setor fotovoltaico como concessionárias, seguradoras, instituições financeiras, instituições de ensino, integradoras e fabricantes. PROGRAMAÇÃO
09h00 - Abertura dos Trabalhos Representantes das instituições organizadora do evento (IEE/USP, ABINEE, ABSOLAR, ABGD, ABENS, SENAI/SSCP e GIZ Mecanismos de Qualidade no Setor Fotovoltaico
09h30 - Apresentação do conceito IRENA - Infraestrutura/Mecanismos de Qualidade no Setor Fotovoltaico Roberto Zilles, IEE/USP Normas e Regulamentação
10h00 - ABNT CB-03/IEC 60364-7: Instalações elétricas de baixa tensão: Arranjos Fotovoltaicos Marcelo Pinho, IEE/USP
10h30 - Experiências das Distribuidoras com Geração Distribuída/Sistemas de Compensação Ciceli Martins Luiz, CEMIG
11h00 - Visão das Distribuidoras sobre Geração Distribuída/Sistemas de Compensação Elio Vicentini, ABRADEE
11h30 - Roda de perguntas e discussão em plenário Certificação de Produtos
14h00 - Critérios de Qualidade em Dispositivos de Proteção contra Surto (DPS) para Sistemas Fotovoltaicos Bruno Sacute, Finder
14h20 - Critérios de Qualidade em Cabos Fotovoltaicos Ivan Arca Uliana, Prysmian
14h40 - Critérios de Qualidade em Módulos Fotovoltaicos Gabriel Magdalon, Jinko Solar
15h00 - Roda de perguntas e discussão em plenário Certificação de Pessoas
15h30 - Experiências Internacionais com Certificação de Instaladores de Sistemas Fotovoltaicos Shaw O'Brien, NABCEP, Certificadora nos EUA
16h00 - Certificação de Instaladores de Sistemas Fotovoltaicos SENAI/SSCP no Brasil Fernando Gusmão, SENAI/SSCP e Enio de Oliveira, SENAI/SSCP
16h30 - Roda de perguntas e discussão em plenário.
17h00 - Encerramento
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