SETOR ELÉTRICO : NA LINHA DAS IMPREVISIBILIDADES PAULO LUDMER - REVISTA ELETRICIDADE MODERNA

"NINGUÉM SE ENGANE: ÁGUA E ENERGIA SERÃO MAIS CARAS E DE PLANEJAMENTO MUITO COMPLEXO ATÉ PELO MENOS 2017 "

PAULO LUDMER
JORNALISTA,ENGENHEIRO,PROFESSOR,CONSULTOR E AUTOR DE LIVROS COMO DERIÇA ELETRICA E SERTÃO ELÉTRICO
WEBSITE; www.pauloludmer.com.br
FONTE DA NOTICIA
REVISTA ELETRICIDADE MODERNA NOVEMBRO2014-ANO XLIII-EM-488
LINK REVISTA
http://www.arandanet.com.br/midiaonline/eletricidade_moderna/2014/novembro/index.html

Harmonics Reduction in High-Efficiency Operation of Double-Conversion UPS Lorenzo Giuntini

Abstract
UPS are used to protect critical loads, and double-conversion is often the preferred choice. While
providing optimum protection, this topology offers limited efficiency. Some double-conversion UPS
feature a high-efficiency (ECO) mode, with the load normally fed via the bypass path. In this
operating mode, load current harmonics may be let through towards the utility, and may induce a high
load on the neutral conductor. In this context, this paper discusses Advanced ECO Mode topologies
that reduce neutral current and mitigate harmonics resulting from non-linear or unbalanced load.

Introduction
 Uninterruptible Power Supplies (UPS) provide power conditioning and backup power for critical and sensitive equipment, the typical example being Information Technology (IT) equipment in data centers. Double-conversion topology is often the preferred choice, especially for larger UPS installations (as a matter of fact, double conversion topology dominates the market for UPSs larger than 5 kVA used in US data centers [1]). While providing optimum protection, double conversion topology may not offer the highest efficiency: best-in-class efficiency for double conversion transformer-based UPS is around 94 %. Actual efficiency may further drop depending on UPS operating conditions, particularly the load level. In fact, UPS losses may account for 10 % of the total power consumed in a data center [2]. Given the challenges posed by greenhouse gases (GHG) emission targets, energy intensive facilities are looking at alternative UPS operating modes to increase the overall site efficiency. Some double conversion UPS feature a high-efficiency mode (typically referred to as ECO mode), where losses are greatly reduced by feeding the load via the bypass path, with resulting efficiency exceeding 98 %. A common concern is that bypass operation may expose the load to utility disturbances. To address such concerns, previous research activity focused on protection against power quality events (such as interruptions, sags, swells, spikes, etc.) during ECO mode operation. This paper takes another perspective, focusing on current harmonics and neutral current resulting from non-linear or unbalanced load. When the UPS is feeding loads with non-linear input characteristics (such as IT equipment) via the bypass path, the resulting harmonics may potentially pollute the power system. These harmonics may induce voltage distortion and increase losses, eventually leading to premature failure of electrical equipment [3]. Additionally, triplen harmonics accumulate in the neutral conductor, and combined with unbalanced loads may potentially lead to overload of the neutral conductor and overheating of the distribution transformer [4]. In this context, this paper explores Advanced ECO Mode topologies that reduce neutral conductor loading and mitigate harmonic injection on the utility supply, presenting experimental results from testing high-power UPS installations.
LINK FULL PAPER
https://copy.com/uFvkhtpuxhNUmGxz

HIGH FREQUENCY LINK UPS SYSTEM By Emad Abdulrazzaq Rasool School of Engineering and Design Department of Electrical Engineering and Electronics Brunel University UNITED KINGDOM

HIGH FREQUENCY LINK UPS SYSTEM
A thesis submitted for the degree of Master of Philosophy
 By Emad Abdulrazzaq Rasool
 School of Engineering and Design Department of Electrical Engineering and Electronics
Brunel University January 2013

ABSTRACT
The main aim of this thesis is to propose, design, simulate and build a new UPS system which can be used for compact applications. The idea of the proposed system is to operate the transformers within the UPS at high frequency so that the size and the weight are kept to minimum. In order to achieve this aim, the transformer within the UPS system is operated at high frequency; however it also carries two 50 Hz waveforms at 180 phase shift so that the transformer does not see this 50 Hz frequency. A cycloconverter is then used to reconstruct the 50 Hz waveform for the UPS output.
The UPS system is simulated using PSPICE software at high frequency link of 500 Hz, 1 kHz, 5 kHz and 10 kHz. The simulation results show that the transformer only passes the high frequency component while the 50 Hz frequency is ‘hidden’ within the transformer. The proposed UPS system is then built using MOSFETs IRF740 as the main switches for the inverter and cycloconverter circuits. A Chipkit-uno32-development-board is used to control the MOSFET switches. Simulated and practical results show the viability of the proposed UPS system.

LINK FULL THESIS
http://bura.brunel.ac.uk/bitstream/2438/7246/1/FulltextThesis.pdf

Design of Robust Controller for Single-Phase Double-Conversion UPS System Seung-Beom Lim, Young-Min Seol, Sang-Hoon Kim, Jin-Woo Lee, and Soon-Chan Hong Dankook University, Korea, Kangwon National University, Korea

Design of Robust Controller for Single-Phase
Double-Conversion UPS System

Seung-Beom Liml, Young-Min Seo, Sang-Hoon Kim, Jin-Woo Lee, and Soon-Chan Hongl
 Dankook University, Korea,  Kangwon National University, Korea, Doowon Technical College,
Koreabus1327@hotmail.com, maniyan@nate.com, kshoon@kangwon.ac.kr, jinwoo@doowon.ac.kr, schong@dku.edu

Abstract-UPS is largely divided into passive-standby, line interactive,
and double-conversion types. In general, a double conversion
type is used at a site requiring a high reliability. The
main function of the double-conversion UPS is providing the
constant voltage, constant frequency, regardless of the linear or
non-linear load and variation of the load. In this paper, the
robust controller of the single phase double-conversion UPS is
designed and its performance is verified by both simulations and
experimentation.

Encuentro Científico Internacional 2015 de verano "François Piuzzi" Viernes 2 - domingo 4 de enero de 2015- LIMA -PERÚ

Encuentro Científico Internacional 2015 de verano -LIMA - PERÚ
"François Piuzzi"
Viernes 2 - domingo 4 de enero de 2015
Cuartel General del Ejército "Pentagonito" donde se llevó a cabo la COP 20 oficial
Programa completo preliminar
http://www.encuentrocientificointernacional.org/eci2015v/eci2015vprograma20141130.pdf

Libro de resúmenes del ECI 2015 de verano
http://www.encuentrocientificointernacional.org/eci2015v/eci2015vlibroderesumenessinmails.pdf

WORKSHOP COMSOL ENG. ALISSON ROMAN -CAMPINAS SÃO PAULO-09 DECEMBRO 2014

Eng.Tiago Davi Curi Busarello - Doutorado-CONDICIONAMENTO DE ENERGIA ELÉ...

VISITA AO LABORATORIO DE PESQUISA CONDICIONAMENTO ENERGIA
 TESE DE DOUTORADO DO MESTRE ENG. TIAGO CURI BUSARELLO
 LABORATÓRIO DE CONDICIONAMENTO DE ENERGIA ELÉTRICA - LCEE- UNICAMP-BRASIL AV. ALBERT EINSTEIN 400 -CAMPINAS - SP-BRASIL
 DEPARTAMENTO DE SISTEMAS E ENERGIA - DSE
 ATIVIDADES DESENVOLVIDAS NO LCEE
 São definidos como Condicionamento da Energia Elétrica os procedimentos e tecnologias necessários para: i) minimizar o conteúdo harmônico da tensão e da corrente; ii) maximizar o fator de potência das cargas; iii) estabilizar a tensão de suprimento; iv) minimizar a geração de componentes de alta freqüência; v) fornecer de modo adequado a alimentação para a carga; iv) flexibilizar o uso do sistema de energia elétrica.

Design and Implementation of the 40kV, 13kW High Efficiency High Voltage Capacitor Charger

This paper deals with design and implementation of the 40kV, 13kW high-efficiency high-voltage capacitor charger for the pulsed power modulator. The proposed capacitor charger consists of the 24 series-connected power cells, a resonant inverter, and a distinctive high-voltage transformer. Moreover, third winding of high-voltage transformer is added to compensate voltage unbalance of each power cell automatically, and the relay mode operation is suggested to generate minimum 1kV even at light load condition while restricting the maximum switching frequency. In this paper, the operation principles of series-loaded resonant converter are explained and analyzed. In addition, the mode analysis of the resonant converter operating at above resonance frequency are conducted. Based on these analysis, the design of the 40kV, 13kW capacitor charger is suggested. To verify the proposed design, PSpice simulation modeling was performed, and the reliability and robustness of the proposed high voltage capacitor charger is proved through experimental results. In future, the pulsed power modulator based on the proposed high voltage capacitor charger will be developed by connecting IGBT switches between the power cells.

Circuit Systems with MATLAB1 and PSpice Won Y. Yang and Seung C. Lee Chung-Ang University, South Korea

LINK ORIGINAL
http://idd.bookzz.org/book/2072742/1c713a

Electrotechnical Systems: Calculation and Analysis with Mathematica and PSpice

LINK ORIGINAL
http://idd.bookzz.org/book/881655/d9a6bc

PSPICE HERNITER

LINK
https://copy.com/zzfZZCRzxQeOiVzD

HVDC AND FACTS CONTROLLERS The use of static converters in power systems Vijay K. Court

Preface the author The reason for writing the book was that when significant development power direct current (HVDC) and flexible power transfer alternating current (EGTT) in the past 10 years is still not a book appeared, which would be a simple and brief summary reflected these new data. Advances in recent years primarily due to the success of in the development of electronic converters and microprocessors. It is necessary eg hoped that this book is at least partially fill the gap in technical literature on the subject.

Semiconductor Power Electronics Author Belous Efimenko Turtsevich

Belous A., Efimenko SA, AS Turtsevich Semiconductor Power Electronics Moscow: Technosphere, 2013. - 216 p. The book provides information about the operating principles and fundamental technical characteristics of the basic elements of power electronics. Using practical examples, the basic aspects of designing  and manufacturing elements of power electronics, especially their use in various types of energy-saving appliances and electric tronic devices for lighting equipment, automotive electronics, control  motors and power supplies.
LINK
https://copy.com/cBSiMpyljyyF1CIh

WELLE TECNOLOGIA LASER Brazilian-German Innovation Congress 01-04 DECEMBRO 2014 SÃO PAULO

PALESTRA DO ENG. RAFAEL M. BOTTOS PRESIDENTE CEO WELLE TECNOLOGIA LASER BRASIL BRAZILIAN GERMAN INNOVATION CONGRESS WORLD TRADE CENTER SAO PAULO

Bem Vindo a Welle Laser - máquinas de marcação laser e gravação laser. Seja bem vindo a empresa Welle Tecnologia Laser, uma organização que possui foco no desenvolvimento de soluções baseadas em uma das mais fantásticas e versáteis ferramentas industriais da atualidade: a tecnologia laser. Temos foco em solução de marcação a laser e gravação a laser - marcação de metais e polimeros e gravação em metais. Somos apaixonados pelo que fazemos, sempre buscando oferecer o que há de mais moderno disponível no mundo, em máquinas laser. Para isso, trabalhamos próximos dos principais centros mundiais de tecnologia laser, como o Fraunhofer Institute – Alemanha, com o objetivo de levar à indústria soluções inovadoras, eficientes e com expressivas vantagens em redução de custos e o aumento de produção. Assim nos posicionamos na vanguarda do desenvolvimento de tecnologias para máquinas laser no Brasil, sendo pioneiro por exemplo no desevolvimento de codificadoras laser e soluções para rastreabilidade industrial.

I CSS di Riello UPS verificati da IMQ - Ristori (RGR TV) intervista Mori...

BRAZILIAN GERMAN INNOVATION CONGRESS WORLD TRADE CENTER SAO PAULO

PARTICIPAÇÃO  NO SEI SEMINARIO DE EMPREENDEDORISMO INOVADOR WORLD TRADE CENTER  01-04 DECEMBRO 2014 SÃO PAULO BRASIL,REALMENTE FOI MUITO GRATO CONHECER NOVAS EMPRESAS QUE ESTÃO MUDANDO A REALIDADE BRASILEIRA.

O PAPEL DA UNIVERSIDADE NA FORMAÇÃO EMPRENDEDORA MARCOS HASHIMOTO - OPEN INNOVATION WEEK 01-04 DECEMBRO 2014 SAO PAULO BRASIL

O PAPEL DA UNIVERSIDADE NA FORMAÇÃO EMPRENDEDORA MARCOS HASHIMOTO

PARTE DA PALESTRA MINISTRADA PELO ESPECIALISTA Doutor em Administração pela FGV,SR. MARCOS HASHIMOTO NO SEMINARIO DE EMPREENDEDORISMO INOVADOR 01-04 DECEMBRO 2014 NO WORLD TRADE CENTER SÃO PAULO-BRASIL.
WEBSITE AUTOR
http://www.marcoshashimoto.com/

MEDIDOR ENERGIA SMART GRID APRESENTADO PELO ENGENHEIRO HUGO SCHETTINI DA EMPRESA SMARTI9 NA BRAZILIAN GERMAN INNOVATION CONGRESS - 1-4 DECEMBRO 2014 NO WORLD TRADE CENTER SÃO PAULO BRASIL

EXCELENTE PRODUTO MEDIDOR SMART GRID APRESENTADO PELO ENGENHEIRO
HUGO SCHETTINO DA EMPRESA SMARTI9 UNIVERSIDADE FEDERAL JUIZ DE FORA -MG-BRASIL NO BRAZILIAN -GERMAN INNOVATION CONGRESS- 01-04 DECEMBRO 2014  WORL TRADE CENTER SÃO PAULO BRASIL
Smarti9 Communications A Smarti9 Ltda é uma spinoff que desenvolve soluções inovadoras e confiáveis, atuando principalmente com sistemas Power Line Communication (PLC) de elevada confiabilidade para smart grid communications e internet of things. A empresa é resultado da experiência e know-how adquiridos pelos seus sócios ao longo dos últimos doze anos no ramo de pesquisa e desenvolvimento para o setor de telecomunicações. Os mesmos instituíram o único laboratório especializado para ações de Pesquisa, Desenvolvimento e Inovação relacionadas à tecnologia PLC da América Latina na Universidade Federal de Juiz de Fora. Com a possibilidade de industrialização dos sistemas desenvolvidos no laboratório, os sócios fundaram a Smarti9 em 28/11/2012 e atualmente a empresa está incubada no CRITT (Centro Regional de Inovação e Transferência de Tecnologia) da Universidade Federal de Juiz de Fora, que oferece infraestrutura e serviços de suporte para o desenvolvimento da empresa.
WEBSITE
http://smarti9.com.br/

High Efficiency Power Electronics - 2013 UC Santa Barbara Summit on Ener...

Comemoração da Milésima Tese de Doutorado da FEEC - UNICAMP 2014

Experiencias de Titulacion en la FIEE UNI 26 10 2013

MODELING OF PIEZO-INDUCED ULTRASONIC WAVES FOR STRUCTURAL HEATH MONITORING KULDEEP DOCTORAL THESIS DEFENSE DEPARTMENT OF AERONAUTIC AND ASTRONAUTIC STANFORD UNIVERSITY

Master's Thesis Defense: Vehicle-to-grid (V2G) Integration with the Chevy Volt Drivetrain Master's Electrical Engineering Thesis Defense. Cal Poly - San Luis Obispo, CA-USA

My Master's Electrical Engineering Thesis Defense. Cal Poly - San Luis Obispo, CA.

Presentation Q&A Available: 

Full paper thesis is available via: http://digitalcommons.calpoly.edu/the...

"Rastreador de Máxima potência para sistemas fotovoltaicos utilizando o método da impedância característica de conversores estáticos". Defesa de mestrado - Jefferson William Zanotti Programa de Pós-Graduação em Engenharia Elétrica INEP UNIVERSIDADE FEDERAL SANTA CATARINA BRASIL

 Defesa de mestrado - Jefferson William Zanotti O coordenador do Programa de Pós-Graduação em Engenharia Elétrica, Prof. Carlos Galup Montoro, aprovou no dia 27 de maio de 2014, a indicação de Banca Examinadora de Dissertação de Mestrado do aluno Jefferson William Zanotti cujo título é "Rastreador de Máxima potência para sistemas fotovoltaicos utilizando o método da impedância característica de conversores estáticos". Área de Conhecimento: Eletrônica de Potência e Acionamento Elétrico Banca Examinadora: Prof. Denizar Cruz Martins, Dr. - orientador - UFSC; Prof. Adriano Péres, Dr. - FURB; Prof. Enio Valmor Kassick, Dr. - IFSC; Prof. Roberto Francisco Coelho, Dr. - UFSC e Prof. Samir Ahmad Mussa, Dr. -- suplente - UFSC

"Rastreador de Máxima potência para sistemas fotovoltaicos utilizando o método da impedância característica de conversores estáticos" Defesa de mestrado - Jefferson William Zanotti - Arguições - INEP -UNIVERSIDADE FEDERAL DE SANTA CATARINA BRASIL

 Defesa de mestrado - Jefferson William Zanotti - Arguições O coordenador do Programa de Pós-Graduação em Engenharia Elétrica, Prof. Carlos Galup Montoro, aprovou no dia 27 de maio de 2014, a indicação de Banca Examinadora de Dissertação de Mestrado do aluno Jefferson William Zanotti cujo título é "Rastreador de Máxima potência para sistemas fotovoltaicos utilizando o método da impedância característica de conversores estáticos".
 Área de Conhecimento: Eletrônica de Potência e Acionamento Elétrico
 Banca Examinadora: Prof. Denizar Cruz Martins, Dr. - orientador - UFSC; Prof. Adriano Péres, Dr. - FURB; Prof. Enio Valmor Kassick, Dr. - IFSC; (17:25) Prof. Roberto Francisco Coelho, Dr. - UFSC; (42:30) Prof. Samir Ahmad Mussa, Dr. -- suplente - UFSC

Sensor de Imagem CMOS Simplificado Com Largo Alcance Dinâmico Apresentação de Defesa da Tese de Doutorado em Engenharia Elétrica PPGEE UFMG 31 JUL 2014

Apresentação de Defesa da Tese de Doutorado em Engenharia Elétrica PPGEE UFMG 31 JUL 2014

The PDF text of the thesis presented in this video can be downloaded from:

http://www.ppgee.ufmg.br/defesas/932D.PDF