Linhas de Transmisão - Apresentação da Obra LT CC 800kV XINGU - ESTREITO (BMTE)-BRASIL

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).

VER RELATORIO COMPLETO  NO SEGUINTE LINK ORIGINAL
http://www.bmte.com.br/wp-content/uploads/2016/06/RIMA.pdf

10th SEMINAR ON POWER ELECTRONICS AND CONTROL-SANTA MARIA RS - BRAZIL

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.

LINK  : http://farol.ufsm.br/transmissao/transmissao-ao-vivo-sepoc-24102017-09h

Single phase transformerless inverter topologies for grid-tied photovoltaic system: A review - Monirul Islam a,Saad Mekhilef ,Mahamudul Hasan

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 -Monirul Islam, Saad Mekhilef ✉ Power Electronics and Renewable Energy Research Laboratory (PEARL), Department of Electrical Engineering, University of Malaya.

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 Roderick Javier Garcia Montoya University of Arkansas, Fayetteville

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