SAFT EMPRESA GLOBAL BATERIAS CONCLUIU SISTEMA DE ARMAZENAMENTO DE ENERGIA SOLAR

ARTICULO PUBLICADO NA REVISTA ELETRICIDADE MODERNA No 457 ABRIL 2012 ARANDA EDITORA ANO XL BRASIL

INCUBADORA DE EMPRESAS - PARTE 1

Power Quality Improvement of Single-Phase Grid-Connected Photovoltaic Inverter

A Dissertation for the Degree of Doctor of Philosophy

Power Quality Improvement of Single-Phase

 Grid-Connected Photovoltaic Inverter

Department of Information and Communications Engineering

Graduate School

Chungnam National University

By

Trung-Kien Vu

Advisor

Se-Jin Seong

February 2011 

 

ABSTRACT*

 

The economical and environmental impacts of fossil fuels have forced society to  investigate sustainable solutions.  The  interest  has

            focused on the renewable energy sources since the green and clean benefits. Consequently, investments in research and development in the field of power electronics have increased proportionally, especially in high voltage and high power grid-connected systems.

 

The distributed power generation (DG) systems are becoming more common as the need  for electric power increases because of taking advantage of using different energy sources such as wind and solar. A few examples are hybrid cars, solar houses or hospitals in remote  areas  where  providing  clean,  efficient  and  reliable  electric power is critical to the loads. In such systems, the power is distributed from the source side to the load side via power electronic converters in the system. At low and medium power applications, the task is often left to single-phase inverters where they are the only interface between sources connected to dc bus and loads connected to an ac bus. This dissertation investigates the power quality improvements to properly regulate  the  power  flow  between renewable  source  and  the  utility network. The control method for single-phase inverters used in low and medium power DG systems is based on (and also takes the advantage of) the well-known d-q transformation (which is mostly employed for three-phase   converters’   analysis   and   control   design).   The transformation requires at least two independent phases for each state variable in the system; thus a second phase must  be created. This virtual-phase can be done by DSP implementation, hence there is no need for additional hardware in the system, making it more attractive and cost effective method. 

 

The Proportional-Resonant (PR) controller based current control scheme,   compared   with   conventional  Proportional-Integral (PI)

            controller, not only provides a superior transient  response but  also provides a zero steady-state error as well as a high disturbance rejection and a low output current THD under grid-tie mode operation. The entire controller can be implemented in a DSP digital control board

LINK THESIS

Design and Implementation of Digital Dimming Electronic Ballast

Department of Electrical Engineering Journal

Design and development of digital dimming electronic ballast

Design and Implementation of
The Digital Dimming Electronic Ballast

Advisor: He Jinman
Graduate Student: Wang Ming Shan
 China 2002 CHUN YUAN CHRISTIAN UNIVERSITY
Abstract

    This  thesis  aims  to  present  the  design  and  practice  of  a  digital electronic ballast for fluorescent lamps. It introduces the characteristics of lamp, DC/DC converter, power factor correction circuit IC  6561, and resonant circuit IC 6574, The electronic ballast is developed by using IC 6561and IC  6574, and other circuits to meet the need for high power factor, long lamp life, high luminous efficiency, and dimming control.
    Also the circuit operation principle, analysis of carefully designed circuit parameters, practical consideration of self-excitation, and dimming control are explained in detail .The test of real design is carried out at last, and the result shows the proposed digital electronic ballast can fulfill the design purposes.

A REDUCED RATING ACTIVE POWER FILTER TO SUPPRESS NEUTRAL CURRENT HARMONICS IN THREE PHASE FOUR WIRE SYSTEMS JANG MIN SOO

LINK

SEMINARIO ELETRONICA POTENCIA SEPOC 2011 - Prof. Dr. José Marcos Alonso Álvarez -- (UNOVI, Espanha) - Parte 1/6

Título: Sistemas de alimentação de Lâmpadas LED - Inovação e Transferência de Tecnologia na Universidade de Oviedo Palestrante: Prof. Dr. José Marcos Alonso Álvarez -- (UNOVI, Espanha)

CONTROL AND POWER SUPPLY FOR RESISTANCE SPOT WELDING (RSW) (Spine title: Control and Power Supply for RSW) (Thesis format: Monograph) by Meranda Salem

Graduate Program in Electrical and Computer Engineering
A thesis submitted in partial fulfillment
of the requirements for the degree of
Doctor of Philosophy
The School of Graduate and Postdoctoral Studies
The University of Western Ontario
London, Ontario, Canada
© Meranda Salem 2011

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PWM RECTIFIER WITH ACTIVE FILTERING PHD THESIS M.Sc MARIUSZ CICHOWLAS.

Warsaw University of Technology
Faculty of Electrical Engineering
Institute of Control and Industrial Electronics

Ph.D. Thesis
M. Sc. Mariusz Cichowlas

Thesis supervisor
Prof. Dr Sc. Marian P. Ka mierkowski

Warsaw, Poland 2004

The work presented in this thesis was carried out during my Ph.D. studies at the Institute of Control and Industrial Electronics at the Warsaw University of Technology. Some parts of the work  were  realized  in  cooperation  with  University  of  Aalborg,  Denmark  (International Danfoss Professor Programme - Prof. Frede Blaabjerg).
LINK DOWNLOAD THESIS

RETIFICADORES TRIFASICOS COM FATOR DE POTENCIA UNITARIO BASADOS NOS TRANSFORMADORES TRIFASICOS/BIFASICOS

RETIFICADORES TRIFÁSICOS COM FATOR DE. POTÊNCIA UNITÁRIO BASEADOS NOS. TRANSFORMADORES TRIFÁSICOS/BIFÁSICOS
:LINK TESE

Engenharia de Energia 2/2 UNIVERSIDADE DE SAO PAULO SAO CARLOS BRASIL

 Palestra sobre a criação de uma carreira de Engenharia de Energia na USP de São Carlos.

Engenharia de Energia 1/2 UNIVERSIDADE DE SAO CARLOS USP BRASIL

Palestra sobre a criação de uma carreira de Engenharia de Energia na USP de São Carlos.

DESARROLLO AEROESPACIAL EN EL PERÚ-27 10 2011-SOCIEDAD LASER

Ing. Martín Canales Romero, Agencia Espacial Alemana- Programa Agencia Espacial Europea Ing. Jaime Estela Brinda Servicios a la Agencia Espacial Alemana Conducción: Ing. CIP Luis Castañeda Lizárraga En este tema del "Desarrollo Aeroespacial en el Perú" El Ing. Luis CASTAÑEDA L. se comunica vía SKYPE con el Ing.. Martín CANALES R. y el Ing. Jaime ESTELA peruanos residentes en Alemania quienes brindan servicios para la Agencia Espacial Alemana, programa Agencia Espacial Europea y pertenecen a la Red Europea de Ingenieros Peruanos-REIP.

Ing. Martín Canales y Jaime Estela FORO SATÉLITE PARA EL DESARROLLO ECONÓMICO...

Ing. Martín Canales y Jaime Estela de la Agencia Aeroespacial de Alemania. FORO SATÉLITE PARA EL DESARROLLO ECONÓMICO E INCLUSION SOCIAL DEL PERÚ,

"Las patentes y el grado de innovaciónde una sociedad" María Rivera y Modesto Montoya

Seminario "Respondiendo a las necesidades de la empresa: Rol de la Propiedad Intelectual en el marco de los Fondos Fincyt, Fidecom y Fondecyt" 31 de mayo de 2012 "Pueden las patentes medir el grado de innovaciónde una sociedad" María Rivera y Modesto Montoya

Por que os artigos de postgraduação são recusados/reprovados?

David Camelô - Como Transformar R$12,00 em R$120.000,00 mensais

Sáiba como ganha um bom dinheiro na Internet, ótimo método com depoimentos Reais no Site. Confira: http://www.internetdinheiro.com.br/65499 Como Transformar R$ 12,00 Em R$ 120.000,00 Mensais Um dos maiores palestrantes do Brasil começou como camelo. Escritor, palestrante e consultor de marketing. Definido como um dos maiores consultores palestrantes na área de marketing e vendas do Brasil, onde é citado pelo americano Phill Kotler, a maior autoridade em marketing do mundo. David chega a fazer 15 palestras por mês e concede inúmeras entrevistas na mídia nacional e internacional. O segredo da Banca de David que é reconhecida mundialmente, foi desvendado. "O segredo é se destacar sempre dos concorrentes", conta David. "O sucesso de um produto está em saber lidar com o publico". "O cliente é mesmo um Rei e não tem conversa. É preciso ter transparência, então não mostre aquilo que não pode oferecer. Os clientes gostam sempre de boas novidades, por isso devemos surpreende-los a toda hora" orientou. Você assistirá a uma performance incrível de Portes gravada ao vivo no Hotel Transamérica.

BRASIL NA AVENTURA ESPACIAL PARTE1

ENG. MARCOS PONTES PRIMER ASTRONAUTA BRASILEIRO

Maxwell's Equations and Electromagnetic Waves I

 Fundamentals of Physics, II (PHYS 201) Waves on a string are reviewed and the general solution to the wave equation is described. Maxwell's equations in their final form are written down and then considered in free space, away from charges and currents. It is shown how to verify that a given set of fields obeys Maxwell's equations by considering them on infinitesimal cubes and loops. A simple form of the solutions is assumed and the parameters therein fitted using Maxwell's equations. The wave equation follows, along with the wave speed equal to that of light (3 x 10^8), suggesting (correctly) that light is an electromagnetic wave. The vector relationship between the electric field, the magnetic field and the direction of wave propagation is described. 00:00 - Chapter 1. Background 04:43 - Chapter 2. Review of Wave Equation 20:01 - Chapter 3. Maxwell's Equations 56:47 - Chapter 4. Light as an Electromagnetic Wave Complete course materials are available at the Open Yale Courses website: http://open.yale.edu/courses

9. Magnetism II

 Fundamentals of Physics, II (PHYS 201) The mechanism by which electric currents produce a magnetic field (Law of Biot-Savart) is discussed in greater detail. The field due to a single loop and an infinite wire are computed. Ampere's Law is derived. The operation of the DC electric motor is used to illustrate the torque generated on moving charges in a magnetic field. 00:00 - Chapter 1. Review of Magnetic Fields 14:00 - Chapter 2. Torque on Charge moving in Magnetic Field 20:56 - Chapter 3. Magnetic effects produced by electric currents 51:26 - Chapter 4. Ampere's Law Complete course materials are available at the Open Yale Courses website: http://open.yale.edu/courses

11. Lenz's and Faraday's Laws

Fundamentals of Physics, II (PHYS 201) The electric effect of a changing magnetic field is described using Faraday's Law. The direction of the current so generated is given by Lenz's Law. The operation and energy accounting of the generator are described. The concept of inductance is introduced. The Betatron is described as an example of Faraday's Law. Self and mutual inductance are introduced. The energy density in a magnetic field is derived. 00:00 - Chapter 1. Review of Lenz and Faraday's Law 25:37 - Chapter 2. The power generator 37:45 - Chapter 3. Mutual and self inductance 64:10 - Chapter 4. Energy density of a magnetic field Complete course materials are available at the Open Yale Courses website: http://open.yale.edu/courses This course was recorded in Spring 2010.