Power Electronics,Eletrônica de Potencia,СИЛОВОЙ ЭЛЕКТРОНИКИ,전력전자,Engenharia Eletrônica,Paradigmas da Ciencias,Inovaçoes Tecnologicas
“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.
Linha de Transmissão (LT) Corrente Contínua (CC) +800 kV
Xing/Estreito e de suas Instalações Associadas. Esta LT, com
extensão de 2.086,9 km, interceptará quatro estados – Pará,
Tocantins, Goiás e Minas Gerais. A LT terá início na
Subestação (SE) Xingu, localizada a aproximadamente 17 km da
UHE Belo Monte, no município de Anapu-PA, seguindo até a SE
Estreito, localizada no município de Ibiraci-MG.
Considerando a extensão e importância do empreendimento e
buscando otimizar o planejamento e a execução das obras, a LT
(CC) +800 kV Xingu/Estreito foi dividida em 8 trechos, cada um
com aproximadamente 260 km. Um grupo de quatro construtoras
(EPCistas) será responsável pelos respectivos trechos
contratados, possibilitando, dessa forma, um maior controle por
parte da equipe da SPE S.A.
Um dos Eletrodos será instalado no município de Altinópolis, SP,
e será interligado à Estação Conversora (EC) Estreito por meio
da Linha de Eletrodo, que interceptará 5 municípios: Ibiraci e
Claraval, no Estado de Minas Gerais, e Franca, Patrocínio
Paulista e Altinópolis, no Estado de São Paulo. Já o Eletrodo que
interligará a EC Xingu será instalado em Anapu, PA, com a Linha
de Eletrodo sendo instalada apenas neste município. LOCALIZAÇÃO DO EMPREENDIMENTO
O Mapa de Localização apresenta a localização geográfica do
empreendimento, nos Estados de Pará, Tocantins, Goiás, Minas
Gerais e São Paulo.
OBJETIVOS E JUSTIFICATIVAS DO EMPREENDIMENTO
A Usina Hidrelétrica de Belo Monte, em construção na região de
Altamira e Vitória do Xingu, no Pará, na sua configuração final,
terá capacidade instalada de 11.233 MW, sendo 11.000 MW na
casa de força principal e 233 MW na casa de força secundária.
Por se tratar de uma usina hidrelétrica com grande capacidade
instalada, com potencial para gerar muita energia, parte da
produção durante os meses chuvosos será enviada para os
estados das regiões Sudeste e Nordeste, principais consumidores
do país.
A fim de facilitar e otimizar o escoamento da energia produzida,
foram comparadas diversas tecnologias existentes. Por fim,
optou-se pelo sistema de Corrente Contínua de ±800 kV para
reforço à interligação Norte – Sudeste, além de um sistema em
corrente alternada de 500 kV como reforço às interligações Norte
- Nordeste – Sudeste.
As Instalações Associadas da LT (CC) +800 kV Xingu/Estreito
incluem as Estações Conversoras (EC) Xingu e Estreito, dois
Eletrodos de Terra, com suas respectivas Linhas de Eletrodo,
com extensões de aproximadamente 46 km (Linha de Eletrodo
Xingu) e 74 km (Linha de Eletrodo Estreito), para interligação
desses eletrodos às ECs, e sete Estações Repetidoras (ERs).
SEPOC 2017 is the 10th edition of the Seminar on Power Electronics and Control and this year the conference will be held with the IEEE seal. The meeting will take place at the Technology Center of the Federal University of Santa Maria and is organized by the IEEE Chapters and Student Branch.
The seminar’s objective is to provide interaction among academia and industry to discuss the latest cutting-edge technologies on Power Electronics and Control and their applications. In 2017, the conference is themed on distributed power generation.
Plenary Session 03: Reliability of Power Electronic Systems – Challenges and State-of-the-Art
Speaker: Huai Wang - Aalborg University, Denmark
Huai Wang is currently an Associate Professor and a Research Thrust Leader with the Center of Reliable Power Electronics (CORPE), Aalborg University, Denmark.
His research addresses the fundamental challenges in modelling and validation of power electronic component failure mechanisms, and application issues in system-level predictability, condition monitoring, circuit architecture, and robustness design. Prof. Wang is a lecturer of a 2-day industry/PhD course on Capacitors in Power Electronics Applications, and a 3-day industry/PhD course on Reliability of Power Electronic Systems held annually at Aalborg University. He is an invited speaker at the European Center for Power Electronics (ECPE) workshops, and a tutorial lecturer at leading power electronics conferences (ECCE, APEC, EPE, PCIM, IECON, etc.). He has co-edited a book on Reliability of Power Electronic Converter Systems in 2015, filed four patents in capacitive DC-link inventions, and contributed a few concept papers in the area of power electronics reliability. Prof. Wang received his PhD degree from the City University of Hong Kong, Hong Kong, and Bachelor degree from Huazhong University of Science and Technology, Wuhan, China. He was a visiting scientist with the ETH Zurich, Switzerland, from August to September 2014, and with the Massachusetts Institute of Technology (MIT), Cambridge, MA, USA, from September to November 2013. He was with the ABB Corporate Research Center, Baden, Switzerland, in 2009. He received the IEEE PELS Richard M. Bass Outstanding Young Power Electronics Engineer Award, in 2016, for the contribution to the reliability of power electronic conversion systems. He serves as an Associate Editor of IEEE Journal of Emerging and Selected Topics in Power Electronics and IEEE Transactions on Power Electronics.
Single phase transformerless inverter topologies for grid-tied
photovoltaic system: A review
Monirul Islam a,Saad Mekhilef ,Mahamudul Hasan Power Electronics and Renewable Energy Research Laboratory (PEARL), Department of Electrical Engineering, Faculty of Engineering, University of Malaya,
Kuala Lumpur 50603, Malaysia Department of Mechanical Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia Abstract :
Grid-tied inverters are the key components of distributed generation system because of their function as
an effective interface between renewable energy sources and utility. Recently, there has been an
increasing interest in the use of transformerless inverter for low-voltage single-phase grid-tied
photovoltaic (PV) system due to higher efficiency, lower cost, smaller size and weight when compared
to the ones with transformer. However, the leakage current issues of transformerless inverter, which
depends on the topology structure and modulation scheme, have to be addressed very carefully. This
review focuses on the transformerless topologies, which are classified into three basic groups based on
the decoupling method and leakage current characteristics. Different topologies under the three classes
are presented, compared and evaluated based on leakage current, component ratings, advantages, and
disadvantages. An examination of demand for the inverter, the utility grid, and the PV module are
presented. A performance comparison in MATLAB/Simulink environment is done among different
topologies. Also an analysis has been presented to select a better topology. Finally, based on the analysis
and simulation results, a comparison table has been presented. Furthermore, some important experimental
parameters have been summarized.
LINK http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.702.4372&rep=rep1&type=pdf
H6-type transformerless single-phase inverter
for grid-tied photovoltaic system
ISSN 1755-4535
Received on 20th April 2014
Accepted on 7th October 2014
doi: 10.1049/iet-pel.2014.0251
www.ietdl.org
Monirul Islam, Saad Mekhilef ✉
Power Electronics and Renewable Energy Research Laboratory (PEARL), Department of Electrical Engineering, University of Malaya,
Kuala Lumpur 50603, Malaysia
✉ E-mail: saad@um.edu.my
Abstract:
There has been an increasing interest in transformerless inverter for grid-tied photovoltaic (PV) system because
of the benefits of lower cost, smaller volume as well as higher efficiency compared with the ones with transformer.
However, one of the technical challenges of the transformerless inverter is the safety issue of leakage current which
needs to be addressed carefully. In addition, according to the international regulations, transformerless inverter should
be capable of handling a certain amount of reactive power. In this study, a new H6-type transformerless inverter for
grid-tied PV system is proposed that can eliminate the threat of leakage current. The proposed topology has also the
capability to inject reactive power into the utility grid. Three-level output voltage employing unipolar sinusoidal pulsewidth
modulation can be achieved with the proposed topology. The proposed topology structure and detail operation
principle with reactive power control are investigated. The relationship among the existing topologies and their
reactive power control capability are also discussed. The proposed topology is simulated in MATLAB/Simulink software
to initially verify the accuracy of theoretical explanations. Finally, a universal prototype rated 1 kW has been built and
tested. The experimental results validate the theoretical analysis and simulation results.
VIEW COMPLETE TEXT: https://pdfs.semanticscholar.org/43da/3251d204cbce6582f68347422b84d95e4a1f.pdf
High-Frequency Transformer Design for Solid-State Transformers in Electric Power Distribution
Systems ABSTRACT
A thesis submitted in partial fulfillment
of the requirements for the degree of
Master of Science in Electrical Engineering
by
Roderick Javier Garcia Montoya
Universidad Tecnológica de Panamá
Bachelor of Science in Electromechanical Engineering, 2011
December 2015
University of Arkansas
This thesis is approved for recommendation to the Graduate Council.
ABSTRACT
The objective of this thesis is to present a high- or medium-frequency transformer design
methodology for Solid-State Transformer (SST) applications. SSTs have been proposed as a
replacement of the traditional 50/60 Hz transformer in applications demanding high-power
density. Moreover, due to the high penetration of distributed generation, DC grids, energy storage
systems, and sensitive loads, SSTs have been considered as an enabling technology for envisioned
future energy systems. These applications demand additional functionalities that may not be
achieved with traditional transformers. For example, active power flow control, harmonic
suppression, voltage regulation, voltage sag compensation, and reduced size and volume.
In this thesis, SST topologies are evaluated in order to determine their impact upon the
transformer design. In addition, design considerations for core and wire selections, isolation
requirements, and different transformer structures are investigated. As a result, the proposed
transformer design methodology accounts for leakage inductance requirements for optimal power
transfer, high-frequency effects in the transformer core and windings, and a flux density
optimization to maximize transformer’s efficiency. The design procedure has been implemented
in MATLAB® as an interactive tool for designing high-frequency transformers. LINK http://scholarworks.uark.edu/cgi/viewcontent.cgi?article=2381&context=etd
Design and Development of High-voltage and High-frequency
Transformer for Solid-state Transformer*
Park Siho
School of Architectural, Civil, Environmental, and Energy Engineering
Graduate School, Kyungpook National University
Daegu, Korea (Supervised by Professor Cha Honnyong)
(Abstract)
In this paper, design guide of high-voltage isolated high-frequency transformer is
proposed. Since a potential difference of up to 20 kV occurs at both ends of a transformer
constituting a 3-port 3-level NPC based dual half-bridge DAB converter of solid-state
transformer, it is necessary to design a transformer capable of 30 kV insulation considering
margin. In order to insulate a voltage of 30 kV with air only, a very long distance between
the primary and secondary wire of the transformer must be used. Therefore, bobbins made of
Teflon resin and Polycarbonate were fabricated and insulation was obtained. To reduce the
insulation parameter, core was connected to output neutral point terminal. The bobbin
consists of an inner bobbin, an outer bobbin, a guard, and is designed to have sufficient
dielectric strength. Through the simulation verification, only the primary wire portion was
molded to remove the dielectric breakdown element generated at the portion where the outer
bobbin and the guard contact with each other. A prototype transformer was built, completed
operation verification and passed 30kV withstand voltage test. In the case of temperature
test, there is no enough air layer to allow heat to escape from the secondary wire.
Therefore, a high number of temperatures are measured, but this can be solved by turning
the fan on.
O Instituto de Eletrônica de Potência (INEP) promoverá o terceiro Seminário Científico de Sistemas de Eletrônica de Potência – SCSEP 2017, evento que ocorrerá nos dias 13 e 14 de dezembro de 2017 no Auditório Luiz Antonio Teixeira, localizado no prédio da Engenharia Elétrica da UFSC, Florianópolis e será organizado por comissão local. O seminário está programado para receber aproximadamente 100 pessoas, entre alunos e professores da instituição e de outras, assim como profissionais da área que atuam nos setores público e privado.
O evento tem como objetivo apresentar e divulgar os últimos avanços da área por meio da ação de alunos e pesquisadores do Instituto, incluindo pós-doutorandos, doutorandos, mestrandos, alunos de iniciação científica e tecnológica e em conclusão de curso de graduação. Tais trabalhos estão sendo desenvolvidos no INEP e se encontram em estágio avançado, representando possíveis soluções para a indústria e possibilitando, assim, a interação entre as partes. No evento serão realizadas também palestras e debates com convidados especialistas da área, com a finalidade de discutir as tendências e demandas atuais para a área de Eletrônica de Potência, bem como suas perspectivas futuras. WEBSITE: http://scsep.inep.ufsc.br/
Doctoral Thesis A Study on High Efficiency Bidirectional
Grid-tied Converters
Sung-Ho Lee (이 성 호) Department of Electrical Engineering
Pohang University of Science and Technology
2016
This thesis presents three high efficiency grid-tied converter topologies and their
respective control algorithms. These converters are applicable to various industrial fields
such as energy storage systems (ESS), renewable energy systems, uninterruptible power
supply (UPS) systems, and electric vehicles (EV).
First, a high efficiency bidirectional grid-tied flyback converter that uses a single
power conversion technique and a control system for it are introduced. The proposed
converter consists of a bidirectional flyback dc-dc converter and an unfolding circuit.
Due to its switching control strategy, the proposed converter performs bidirectional
power conversion between the energy storage device and the grid through only single
step. From the model analysis, the inherent dynamic characteristics are figured out.
Based on the analysis, a control system is developed, which consists of a linear
feedback controller with a low pass filter, a repetitive controller, and a feed-forward
controller; this overcomes the constrains caused by a right-half-plane zero and a filter
resonance and makes the proposed converter achieve the desired control
performances and stability. In conclusion, the proposed converter can obtain high
efficiency using a single power conversion technique, and the developed control
system makes the proposed converter feasible.
Second, a high efficiency single-phase bidirectional inverter for a PV energy
system integrated with an energy storage system. The proposed single-phase inverter
is developed using the transformerless system configuration so that it provides high
power conversion efficiency, excellent power density, and low production cost.
Using its circuit structure and switching operation, the proposed inverter can
suppress the ground leakage current which is considered to be one of the most
important design parameters in a transformerless PV system. Therefore, the proposed
inverter gives the feasibility for the transforemrless system configuration in a PV
energy system integrated with an energy storage system and enhances the overall
performance of the bidirectional power converter system.
The third is a novel high efficiency three-phase bidirectional grid-tied converter with high
power density for high power applications. The proposed converter is composed of the threelevel
dc-dc converter and the modified three-phase T-type three-level inverter. The threelevel
converter circuit configuration gives smaller passive component size and lower switch
voltage stress compared to other two-level grid-tied converters. In addition, due to its novel
circuit structure, the proposed converter can use the active and passive components for only
two phases of the grid in the inverter stage and eliminate the leakage current problem. Thus,
because the proposed converter enables to not only decrease the number of components but
also make the transformerless configuration feasible, it provides higher efficiency and higher
power density compared to other high power grid-tied converters.
All proposed converters are analyzed theoretically, and implemented practically.
to evaluate their performance. Finally, the experimental results show that the
proposed converters improve overall performance such as high power conversion
efficiency, power density, and production cost with satisfying the standards for the
grid regulations.
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COBEP1991-1st BRAZILIAN POWER ELECTRONICS CONFERENCE-FLORIANOPOLIS-SC-BRAZIL
PRIMER CONGRESSO BRASILEIRO ELETRÔNICA DE POTÊNCIA-1991
EN MEMORIA A MI QUERIDA MADRE JUANA MIRANDA DE CAVERO
IN MEMORY OF MY DEAR MOTHER JUANA MIRANDA DE CAVERO
HOMENAGEM A MEU CACHORRO CEBOLINHA UM GRANDE AMIGO
BODO POWER MAGAZINE POWER ELECTRONICS
Power Solutions-SOLUÇÕES EM NOBREAKS E ESTABILIZADORES
REVISTA POTÊNCIA ENG. HILTON MORENO
INFORDATA INGENIERIA DE LA INFORMATICA PERÚ
TEST UPS ONLINE NONLINEAR LOAD FORTALEZA CEARA BRASIL
CONCEITOS BASICOS DE UPS ONLINE EMPRESA KOLFF
BLOGS E WEBSITES
Eng.Gustavo C. Branco Departamento de Engenharia Elétrica da Universidade Federal de Ceará -BRASIL
ENG. ARMANDO CAVERO MIRANDA MASTER IN INDUSTRIAL ELECTRONICS PERU-BRASIL