RETIFICADOR CARREGADOR MICROPROCESSADO RTA

RTA presente no Power Electronics South America 2012 An event sponsored by PCIM

11. - 13.09.2012
São Paulo

Power Electronics South America 2012
An event sponsored by PCIM
 PCIM in Sao Paulo is an international meeting point for professionals from the field of power electronics and its applications in drive technology, as well as for power quality. Visitors will find at the fair the latest power semiconductors, passive components, products for thermal management, new materials and sensors and servo technology and products related to power quality and energy management. And all of that compact under one roof.

Advisory Board

Chairman

Prof. Marcelo Lobo Heldwein

Federal University of Santa Catarina, BR

Consultatory Board

Members

Prof. Ivo Barbi

Federal University of Santa Catarina, BR

Prof. Leo Lorenz

ECPE, D

Technical Conference Board

Members

Prof. Maurício Aredes

Federal University of Rio de Janeiro, BR

Ildo Bet

PHB ELETRONICA Ltda., BR

Prof. Henrique A. Carvalho Braga

Federal University of Juiz de Fora, BR

João Cairo

Emerson Network Power do Brasil Ltda., BR

Prof. Carlos Alberto Canesin

São Paulo State University, BR

Prof. Renato Carlson

Federal University of Technology of Parana, BR

Nicholas Clark

Powerex, USA

Prof. Jerôme Cros

University of Laval, CA

Prof. Nilson de Lucca

Equisul-GPL, BR

Prof. Guillermo O. García

National University of Rio Cuarto, RA

Prof. Roger Gules

Federal University of Technology of Parana, BR

Prof. Antonio M. Nogueira Lima

Federal University of Campina Grande, BR

Günter Johann Maass

Embraco, BR

Alexandre Saccol Martins

CP Eletrônica S.A., BR

Marcello Mezaroba

Supplier-Mezaroba, BR

Armando Cavero Miranda

RTA Rede de Tecnologia Avançada, BR

Prof. Maria Marta Molinas

Norwegian University of Science and Technology, N

Álvaro Oliveira

Eltek Valere Energy S/A, BR

Prof. Demercil de Souza Oliveira Jr.

Federal University of Ceará, BR

Prof. José Mario Pacas

University of Siegen, D

Norton Petry

WEG do Brasil, BR

Prof. Humberto Pinheiro

University of Santa Maria, BR

Prof. José Antenor Pomilio

University of Campinas, BR

Dr. Edelweis Ritt

Semikron Semicondutores Ltda., BR

Dr. Leonardo Serpa

ABB, CH

Dr. Wanderlei M. da Silva

CTMSP – Brazilian Navy Technological Center in São Paulo, BR

Grover Torrico-Bascopé

Huawei Technologies Sweden AB

GERENG

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HANNOVER MESSE 2012 - Technology meets progress

HANNOVER MESSE 2012, 23 - 27 April

Hannover, 23 - 27 April

Feira de Hannover começa com participação de 135 empresas e entidades brasileiras

De 23 a 27 de abril, durante a Feira Industrial de Hannover, na Alemanha, empresários e empresas brasileiras – através de estandes ou integrando missões comerciais – irão demonstrar e conhecer novas soluções para a produção industrial sustentável, denominada “Greentelligence”.

“A chamada ‘Greentellingence’ é o tema central da Hannover Messe este ano e será abordada em oito diferentes setores de exposição e também nos eventos paralelos à feira”, conta Constantino Bäumle, diretor da Hannover Fairs do Brasil, subsidiária no País da Deutsche Messe AG, promotora do evento.

Segundo ele, o objetivo da Hannover Messe 2012 é mostrar como é possível integrar, de forma inteligente, processos industriais eficientes, materiais ecologicamente amigáveis e produtos sustentáveis. Bäumle informa ainda que as empresas brasileiras estarão distribuídas em quatro áreas da exposição: Suprimentos Industriais (hall 5), Automação Industrial (hall 8), Energia (halls 11 e 13) e Negócios & Mercados Globais (hall 13).

“Os expositores brasileiros buscam parcerias e maior visibilidade no mercado europeu. Há tradicionais expositores como a Novus, de Porto Alegre, especializada em automação industrial, e que expõe pela 15ª vez na feira, e estreantes, como a JPrayon&Partners Brasil, com sede em Blumenau – SC, cujo foco é auxiliar pequenas e médias empresas estrangeiras a ingressarem no mercado brasileiro, através de parcerias, joint-ventures ou fusões que proporcionem troca de tecnologia, principalmente na área de energias renováveis”, explica o executivo.

Cerimônia oficial com destaque para a China

A China é o país parceiro da feira este ano, e neste domingo, 22 de abril, a Hannover Messe será oficialmente aberta pelo primeiro-ministro da República Popular da China, Wen Jiabao, e a chanceler alemã, Angela Merkel, em cerimônia realizada no Centro de Feiras de Hannover, às 18h (horário local). Também serão palestrantes na ocasião, Annette Schavan, ministra alemã da Educação e Pesquisa; Stephan Weil, prefeito da cidade de Hannover e Thomas Lindner, presidente da Federação Alemã de Engenharia (VDMA).

A Review of Multilevel Inverter Based Active Power Filter Madhukar Waware and Pramod Agarwal

A Review of Multilevel Inverter Based Active Power Filter
Madhukar Waware and Pramod Agarwal

Abstract—Use of nonlinear loads at high voltages has increased tremendously in industry. These non-linear loads distort power quality by generating harmonics. Conventional active filters have limitations in high power high voltage systems. Use of multilevel inverter in active filters effectively reduces harmonics in high voltage systems eliminating need of high cost and bulky transformer. This paper presents the state of art of different topologies of multilevel inverter (MLI) used for active power filters (APF), the different control techniques and advanced modulation methods. It is aimed to provide a broad perspective on the status of MLI based APF technology to researchers and application engineers dealing with power quality issues in high voltage systems.
FULL PAPER HERE :http://www.ijcee.org/papers/314-E336.pdf

Webinar: Digital Oscilloscope Power Analysis

Webinar: Power Measurement & Harmonic Analysis

RTA UNICA FABRICANTE DE AMERICA LATINA Filtro Ativo de Harmônicas SAO PAULO BRASIL

RTA REDE DE TECNOLOGIA AVANÇADA :http://www.rta.com.br

FILTERON

Filtro Ativo de Harmônicas

Capacidade: 25 até 800 amperes, paralelis de tensão 220/380/480/690 VCA

Disponível em média tensão até 13800Volts.

Configuração: 3 fases – 4 fios

Frequência: 50/60hz.

Customizações em diferentes montagens mecânicas e graus de proteção.

Interface Modbus e LCD (opcional). Compativel com a IEEE519

Funções

FILTERON é um conversor de potência em estado sólido, que proporciona as seguintes funções:

— Elimina a corrente harmônica em sistemas com carga não-linear.

— Compensação do fator de potência.

— Resistor virtual de amortecimento para prevenir a destruição por ressonância harmônica.

FILTERON é como um gerador de corrente reativa, especialmente quando são necessárias ao sistema. As harmônicas produzidas pelo FILTERON cancelam as harmônicas geradas pela carga não-linear, bem como a corrente injetada com o deslocamento capacitivo necessária a correção do fator de potência total, incluindo o fator de deslocamento.

Após o cancelamento das correntes harmônicas, seguem algumas vantagens óbvias:

(1) Prevenir a destruição por ressonância da corrente harmônica;

(2) Diminuição significativa da distorção da forma de onda da tensão;

(3) Diminuição da queda de tensão em transformadores e cabos;

(4) Redução da variação de temperatura em transformadores e cabos;

(5) Aumento do fator de potência, podendo chegar a unitário

(6)Aumento da vida útil das cargas

(7)Eficiência energética com redução das perdas por aquecimento

(8) Redução dos custos de manutenção.

Power Quality Enhancement of Three-Phase Front-End Rectifier of UPS System Using Current Injection Technique

Power Quality Enhancement of Three-Phase
Front-End Rectifier of UPS System Using
Current Injection Technique
Gunwant A. Dhomane and Hiralal M. Suryawanshi
Visvesvaraya National Institute of Technology, Nagpur, India

Summary: Power Quality, in terms of power factor and harmonics, is greatly hampered by a threephase
rectifier used as a front-end ac-to-dc converter in many systems including a UPS. This paper
presents the high power factor operation of the converter with reduced total harmonic distortion up
to 4%. The power quality up gradation is due to high-frequency current injection, at the input of the
front-end rectifier. A small filter is required at the output for filtering the high-frequency content.
Sinusoidal PWM technique is used for controlling the output voltage. DSP is used for generating
the desired gate pulses. The converter has high efficiency, low EMI emissions, high power packing
density and suitable for UPS system. A Simulation and experimentation is carried out on a 3 kW
converter and experimental results are in good agreement with simulation results.
FULL PAPER HERE:http://www.epqu.agh.edu.pl/archives/journal/v14i2/v14i2_04.pdf

A Modified Harmonics Reduction Technique for a Three-Phase Controlled Converter

A Modified Harmonics Reduction Technique
for a Three-Phase Controlled Converter
Ali M. Eltamaly
Abstract—Three-phase controlled converters have many applications
especially in adjustable speed drives and renewable energy.
A three-phase controlled converter is a good option in these applications
due to its low cost, simplicity, and maintainability with
respect to other solutions like a full-bridge insulated gate bipolar
transistor converter or a Vienna rectifier. Line current harmonics
in this converter is very high; therefore, a harmonics reduction
technique is needed to remedy the problem. In this paper, an
improved injection current technique is introduced to reduce line
current harmonics. The optimal amplitude and phase angle of
the injection current for different loads and firing angles have
been mathematically determined. Simulation for this technique
has been performed by using the PSIM simulation program. An
experimental prototype has been built to verify the mathematical
and simulation results. The simulation and experimental results
show a sensitive variation in the total harmonic distortion of
the line current for the amplitude and angle of injection current
variations. The simulation and experimental results prove the
superiority of this technique in mitigating the requirements for
harmonics standards.
FULLPAPER HERE:http://repository.ksu.edu.sa/jspui/bitstream/123456789/6648/1/Modified%20Harmonics%20Reduction%20Technique%20for%20a%20Three-Phase%20Controlled%20Converter.pdf

LINK2:http://www.mediafire.com/?96w252ckdl10953

Aplicacion de LaPlace (Cir.Elect.)(UTP) parte 1

Emprededurismo en ciencia y tecnología. Ricardo Alcázar, director Cámara de Comercio de Lima

Enviado por memontoyaz em 25/03/2012

Emprededurismo en ciencia y tecnología
Ricardo Alcázar, director Cámara de Comercio de Lima
entrevistado por Modesto Montoya
en Encuentro con la Ciencia
Programa de Radio San Borja, los domingos a las 10:00 am

Filtros ativos paralelos para compensação dinâmica de problemas de corrente em sistemas monofásicos e trifásicos

Este artigo apresenta resultados experimentais de um Filtro Ativo Paralelo Trifásico a 4 fios e de um Filtro Ativo Paralelo Monofásico. O filtro ativo trifásico tem a capacidade de compensar harmônicos de corrente, fator de potência e desequilíbrios de corrente.

Já o filtro ativo monofásico compensa harmônicos de corrente e fator de potência. Ambos os filtros têm o sistema de controle baseado na teoria da potência instantânea (Teoria p-q), que foi implementado num DSP, e utilizam inversores a dois níveis do tipo fonte de tensão com controle de corrente. Resultados experimentais dos filtros ativos mencionados são apresentados.

Para ver o artigo completo, acesse o seguinte endereço:
http://repositorium.sdum.uminho.pt/bitstream/1822/7658/3/XCLEE-07_FAP_MONO_TRI.pdf
FONTE ORIGINAL:http://qualidadedaenergia.blogspot.com.br/

FILTER DESIGN FOR GRID CONNECTED PV INVERTERS

FILTER DESIGN FOR GRID CONNECTED PV INVERTERS
Hyosung Kim Kyoung-Hwan Kim
Kongju National University KACO Korea Inc.
School of Electrical Electronics Engineering 1st Floor, Dongbang Rental Bldg
275, Budae, Cheonan, Chungnam, 330-717 Korea 333-1, Sangdaeeon, Jungwon, Seongnam, Korea
e-mail: hyoskim@kongju.ac.kr e-mail: paul.kim@kacokorea.com

Abstract-This paper proposes filter design guideline for
single-phase grid-connected PV inverters. By analyzing the
instantaneous voltage applied on the filter inductor, the
switching ripple current through the filter inductor is
precisely calculated. Therefore, filter inductance can be
designed accurately which guaranties the switching ripple
current under the target value. Proposed filter design
method is verified by experiment.
FULL PAPER: http://www.mediafire.com/?8co1ka9so395tcr

A Harmonic Circulation Current Reduction Method for Parallel Operation of UPS with a Three-Phase PWM Inverter

A Harmonic Circulation Current Reduction Method for Parallel
Operation of UPS with a Three-Phase PWM Inverter
Kyung-Hwan Kim†, Wook-Dong Kim* and Dong-Suk Hyun**
†*EHWA Technologies and Information, Seoul, Korea
**Dept. of Electrical Eng., Hanyang University, Seoul, Korea



ABSTRACT
In a parallel operation of UPS, there are two types of circulating currents between UPS. One is the low order circulating
current with a fundamental frequency caused by the amplitude and phase differences of UPS output voltages, and the other
is the harmonic circulating current with PWM switching frequency caused by non-synchronized PWM waveforms among
UPS. The elimination of the low order circulating current is essential for optimal load sharing in parallel operations of UPS,
which can be accomplished by the phase and magnitude control at each UPS. The harmonic circulating current may cause
troubles and deteriorate in performance of the controller for optimal load sharing in parallel operation of UPS. This paper
presents a PWM synchronizing method to eliminate the harmonic circulation current in parallel operation of UPS. The
effectiveness of the proposed scheme has been investigated and verified through experiments by a 50kVA UPS.

FULL PAPER HERE:http://www.mediafire.com/?d4zu28a1f8cm9m2

Design of Advanced Voltage Controller for Three-Phase UPS inverters by KYUNG-HWAN KIM

Design of Advanced Voltage Controller for
Three-Phase UPS inverters
by
KYUNG-HWAN KIM
Under the supervision of
Prof. DONG-SEOK HYUN, Ph.D.
Dept. of Electrical Engineering
The Graduate School of Hanyang University

Inverter system, which uses LC component as the output filter, is essential for
a UPS (Uninterruptible Power supply), UPQC (Universal Custom Power Conditioner) and PCS (Power Conditioning System) for the photovoltaic power system.

This paper presents DSP (Digital Signal Processor) controlled voltage
controller for a 3-phase UPS inverter, which is able to compensate the voltage
distortions due to unbalanced and nonlinear loads. The paper discussed the problem
of conventional control schemes for the compensation of voltage distortion when
they are applied to UPS inverter, and proposes advanced synchronous reference
frame control scheme which is able to overcome the problem. In order to solve the
problem of low damping ratio of LC filter, the inverter current feed-forward
compensator including the selection of the feed-forward gain is proposed. And the
digital filter for a compensation of the voltage distortion due to unbalanced and
nonlinear loads is also proposed, which makes PI controllers in the synchronous
reference frame are able to operate with DC values even under nonlinear and
unbalanced load, likewise ensures PI controllers are able to provide zero steady
state error.
In order to improve the practical usability of the proposed scheme in the paper,
the realization of the PLL and the parallel operation, which are essential for UPS,
using the proposed controller is also presented. Especially, this paper shows that
the feed-forward compensation of the inverter current and the PWM
synchronization method proposed in the paper ensures a high precise load-sharing
performance in parallel operation of inverter system.
The effectiveness of the proposed scheme has been investigated and verified in
digital simulation. This thesis also investigates the digital implementation of the
proposed systems and all of the related theoretical concepts and control systems
have been verified in experimental prototype of the UPS systems.

HIGH POWER FACTOR THREE PHASE UNINTERRUPTIBLE POWER SUPPLY USING THE FUEL CELL BASED AUXILIARY POWER SYSTEM JAE HYEONG

HIGH POWER FACTOR THREE PHASE UNINTERRUPTIBLE POWER SUPPLY USING THE FUEL CELL BASED
AUXILIARY POWER SYSTEM
JAE HYEONG

DEPARTAMENT OF ELECTRICAL AND COMPUTER ENGINEERING
SUNGKYUNKWAN UNIVERSITY

FULL PAPER HERE:http://www.mediafire.com/?o8bw1d43d8qfxqq

Thevenin's Theorem - by Prof. Dr. C. B. Bangal

Lecture - 11 The Graph Theory Approach for Electrical Circuits(Part-I)

VISITA DE ENGENHEIROS ELETRICOS DA UNIVERSIDADE FEDERAL DE CEARA

HOJE TEVE A ALEGRIA E A HONRA DE RECEBER A VISITA EM SAO PAULO DOS DESTACADOS PESQUISADORES DE ELETRONICA DE POTENCIA DA UNIVERSIDADE FEDERAL DE CEARA ENG.CICERO TAVAREZ CRUZ E ENG. GUSTAVO C.BRANCO,ELES TEM UMA LABOR DE DESTAQUE NA CIENCIA E TECNOLOGIA NO LABORATORIO DE ELETRONICA DE POTENCIA GEPEC EM CEARA,DESEJO A MEUS AMIGOS UMA FELIZ ESTADIA EM SAO PAULO,SUCESO.

ABB's ACTIVE HARMONIC COMPENSATION systems