A Study on the Transient Operation Algorithm of 30kW Micro-grid based on CVCF Inverter Hu Dong, Lee Department of Electronic and Electrical Engineering The Graduate School Korea University of Technology and Education

A Study on the Transient Operation Algorithm of 30kW Micro-grid based on CVCF Inverter Hu Dong, Lee Department of Electronic and Electrical Engineering The Graduate School Korea University of Technology and Education
ABSTRACT
The phenomenon of energy sinking can be occurred if the output of renewable energy sources is larger than customer loads. In this case, voltage of CVCF battery could be increased rapidly according to the condition of SOC(State of Charge) and blackout could be occurred due to shut-down of CVCF inverter, at carbon free island micro-grid based on the CVCF(Constant Voltage & Constant Frequency) inverter. In order to overcome these problems, this paper proposes a transient operation algorithm in CVCF based micro-grid which in advance prevents shut-down of CVCF inverter during the energy sinking. And also this paper proposes the modeling of 30kW micro-grid including CVCF inverter, PV system, customer load using PSCAD/EMTDC S/W and implements test device of 30kW micro-grid. From the results of 30kW micro-grid modeling and test device based on the proposed algorithm, it is confirmed that CVCF based micro-grid can properly prevent shut-down of CVCF inverter according to SOC and battery voltage of CVCF inverter when energy sinking is occurred.
 Keyword : Carbon free island Micro-grid, CVCF inverter, Energy sinking, Transient operation
LINK:https://www.mediafire.com/file/aakhn6edjiqxuuq/A_Study_on_the_Transient_Operation_Algorithm_of_30kW_Micro-grid_based_on_CVCF_Inverter.pdf/file

UNIFIED POWER QUALITY CONDITIONER: DESIGN, SIMULATION AND EXPERIMENTAL ANALYSIS PhD THESIS-Ahmet TEKE DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING ÇUKUROVA UNIVERSITY

UNIFIED POWER QUALITY CONDITIONER: DESIGN, SIMULATION AND EXPERIMENTAL ANALYSIS PhD THESIS-Ahmet TEKE DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING ÇUKUROVA UNIVERSITY 

 ABSTRACT
 Power quality (PQ) problem can be defined as the deviations of the voltage and/or current from the nominal sine wave. PQ problems generally concern with voltage sags/swells and harmonic currents. Custom Power (CP) devices that mitigate these power quality problems have gained more attention in the recent decades. Unified Power Quality Conditioner (UPQC) is one of the CP devices and it mitigates both load current and supply voltage problems, simultaneously. In this study, UPQC and a new topology of UPQC namely OPEN UPQC are designed, modeled and setup experimentally to mitigate voltage sag/swells and harmonic currents. UPQC consists of Dynamic Voltage Restorer (DVR) and Active Power Filter (APF). An improved voltage compensation controller and new sag/swell detection method based on Enhanced Phase Locked Loop (E-PLL) are presented for DVR. Traditional Instantaneous Reactive Power Theory (IRPT) is optimized for APF control algorithm to compensate harmonic load current under unbalanced and distorted supply voltages. Digital Signal Processor based 6 kVA, 230Vline-lineUPQC and OPEN UPQC prototypes have been developed for laboratory tests. UPQC and OPEN UPQC with proposed controller algorithms effectively compensates the sag/swell in supply voltage by keeping the load voltage amplitude at 0.9-1 per unit and eliminates the load current harmonics by keeping supply current at 5%

Key Words: Unified Power Quality Conditioner, OPEN UPQC, Custom Power, Active
Power Filter, Dynamic Voltage Restorer.
LINK: https://www.mediafire.com/file/wtcckymm7e4qn7i/8411-CONDICIONADOR_POTENCIA.pdf/file

PROJETO E CONSTRUÇÃO DE UM CONVERSOR MONOFÁSICO EM PONTE H MULTICELULAR ENTRELAÇADO PARA GERAÇÃO FOTOVOLTAICA E EÓLICA DE PEQUENO PORTE-GEOVANE LUCIANO DOS REIS-UNIVERSIDADE FEDERAL DE MINAS GERAIS

PROJETO E CONSTRUÇÃO DE UM CONVERSOR MONOFÁSICO EM PONTE H MULTICELULAR ENTRELAÇADO PARA GERAÇÃO FOTOVOLTAICA E EÓLICA DE PEQUENO PORTE-GEOVANE LUCIANO DOS REIS-UNIVERSIDADE FEDERAL DE MINAS GERAIS PROGRAMA DE PÓS-GRADUAÇÃO EM ENGENHARIA ELÉTRICA

 Dissertação de Mestrado submetida à Banca Examinadora designada pelo Colegiado do Programa de Pós-Graduação em Engenharia Elétrica da Escola de Engenharia da Universidade Federal de Minas Gerais, como requisito para obtenção do Título de Mestre em Engenharia Elétrica
 RESUMO
 A demanda por energia elétrica tem aumentado nos últimos anos, além da busca por novas fontes de energia para atender esse crescimento de forma não poluente e sustentável. Assim, as energias renováveis como a fotovoltaica e a eólica, tem ganhado posição de destaque no cenário energético mundial. O proposito deste trabalho é apresentar o projeto, construção e comissionamento de um conversor monofásico híbrido em ponte H multicelular entrelaçado para geração fotovoltaica e eólica de pequeno porte, com potência nominal de 11,7 kW. O sistema é composto por: i) dois arranjos fotovoltaicos de 5,1 kW cada que tem sua potência rastreada através de dois conversores Boost entrelaçados; ii) uma turbina eólica com gerador de imã permanente com potência de 1,5 kW, cuja potência é extraída através de um terceiro conversor Boost. A interface entre a geração e a rede elétrica é realizada por um inversor VSI entrelaçado de quatro braços via um ICT. O trabalho de dissertação apresenta os principais conceitos da geração fotovoltaica e eólica, modelagem dos principais elementos do sistema e as técnicas utilizadas para o controle e rastreamento da máxima potência do sistema. Por fim os resultados simulados e experimentais para o sistema desenvolvido são apresentados e discutidos. Palavras-chave: Geração distribuída, conversor híbrido, MPPT, energia eólica, energia fotovoltaica.
LINK:  https://www.ppgee.ufmg.br/defesas/1389M.PDF

BRAZILIAN POWER ELECTRONICS CONFERENCE 2013 Hotel Serra Azul - Gramado-RS-BRASIL

About COBEP
 The main objectives of COBEP (Brazilian Power Electronics Conference) are to promote a forum to discuss research, development, applications, new trends, and latest advances in Power Electronics and Electrical Machine Control. The event is open for the whole community, but it mainly targets specialists in Power Electronics, Electrical Drives, and Machine Control. Researchers, engineers, businessmen, and engineering students are encouraged to participate in COBEP.
 COBEP has technical co-sponsor from the IEEE (The Institute of Electrical and Electronics Engineers), through a cooperation agreement with PELS (Power Electronics Society), allowing its internationalization and increasing its divulgation. It is a bi-annual event that is organized every odd year by one or more Universities, Research Groups or Institutes from various regions of Brazil. COBEP 2013 is organized by the Federal University of Santa Maria (UFSM), and will take place in the touristic town in the southern Brazilian state of Rio Grande do Sul, Gramado, from 27 to 31 October 2013. Currently, COBEP is the national meeting of Brazilian researchers of Power Electronics and Applications. The organizers are expecting and welcoming increasing participation from the international scientific community, to further strengthen this consolidated forum of advanced technical discussions.

PROPOSIÇÃO DE UM ROTEIRO DE ENSAIOS DE DESEMPENHO PARA FONTES ININTERRUPTAS DE ENERGIA EM CONFORMIDADE COM AS NORMAS NBR 15204 E IEC 62040-3 GILBERTO FERREIRA E SILVA FILHO UNIVERSIDADE FEDERAL DO CEARÁ-BRASIL

PROPOSIÇÃO DE UM ROTEIRO DE ENSAIOS DE DESEMPENHO PARA FONTES ININTERRUPTAS DE ENERGIA EM CONFORMIDADE COM AS NORMAS NBR 15204 E IEC 62040-3
 GILBERTO FERREIRA E SILVA FILHO UNIVERSIDADE FEDERAL DO CEARÁ-BRASIL CENTRO DE TECNOLOGIA GRADUAÇÃO EM ENGENHARIA ELÉTRICA Filho.
RESUMO
Esta monografia apresenta a proposição de um roteiro de ensaios de desempenho elétrico para fontes ininterruptas de energia, tomando como base as normas NBR 15204 e IEC 62040-3. São apresentados os principais tipos e topologias dessas fontes, análises qualitativas das normas citadas, roteiro de ensaios proposto e resultados experimentais da aplicação do mesmo em equipamento desenvolvido pela Universidade Federal do Ceará. É descrito um breve histórico dos diversos tipos de distúrbios apresentados pela rede elétrica e suas respectivas causas. Os conceitos básicos acerca de fontes ininterruptas de energia necessários para o entendimento e aplicação do roteiro em questão são devidamente revisados e restringidos ao assunto tratado no texto. São apresentados os principais aspectos de cada norma acima citadas no que concerne ensaios de natureza elétrica, bem como os conceitos de tipos de carga a serem utilizadas nos ensaios. O roteiro proposto apresenta uma sequência de testes e ensaios desempenho para fontes ininterruptas de energia, explicados passo a passo, indicando instrumentação necessária e mostrando esquema de montagem do circuito para cada ensaio. Por fim, são apresentados resultados experimentais de um equipamento submetido ao roteiro de ensaios proposto. Palavras-Fontes ininterruptas de energia, NBR 15204, IEC 62040-3, ensaios elétricos, desempenho, conformidade.
BANCA EXAMINADORA
PRESIDENTE: PROF. CARLOS GUSTAVO CASTELO BRANCO Msc.
                          PROF. FRANCISCO KLEBER  ARAUJO LIMA Dr.
                          PROF. LUIS DANIEL SANTOS BEZERRA Msc.
                          ENG. ARMANDO CAVERO MIRANDA
LINK MONOGRAFIA
https://www.mediafire.com/file/mf27ot7hvqzu5d0/Monografia__Eng._Gilberto.pdf/file

DATA: 08 DE JULHO DE 2010 FACULDADE DE ENGENHARIA ELÉTRICA
UNIVERSIDADE FEDERAL DE CEARA-BRASIL-AUDITÓRIO DE GRADUAÇÃO
FOI MUITA HONRA SER CONVIDADO DA BANCA EXAMINADORA COMO REPRESENTANTE DA INDUSTRIA EM PARTICULAR TRABALHAVA COMO ENGENHEIRO DE PESQUISA E DESENVOLVIMENTO DA MICROSOL HOJE APC-SCHNEIDER ELECTRIC
NA FOTOGRAFIA COM BRILHANTES REPRESENTANTES DA ELETRÔNICA DE POTENCIA NO BRASIL DE ESQUERDA A DIREITA:
PROF. CARLOS GUSTAVO CASTELO BRANCO Msc.,GILBERTO FERREIRA E SILVA FILHO,
PROF. FRANCISCO KLEBER  ARAUJO LIMA Dr., ENG. ARMANDO CAVERO MIRANDA, PROF. LUIS DANIEL SANTOS BEZERRA Msc.

Inversores Solares e suas Topologias - Webinar-SEMIKRON-REVISTA POTENCIA

REVISTA POTENCIA
 Introdução aos Inversores Solares com comparação entre principais topologias em 2 e 3 níveis, explicando o funcionamento básico e as vantagens e desvantagens de cada uma, seja na complexidade do circuito, nos custos dos componentes (Silício ou SiC) ou na redução dos elementos filtrantes. Apresentação dos componentes disponíveis no mercado para Aplicação Solar, IGBTs Si, MOSFETs SiC e Gate Drivers para controle e proteção dos elementos ativos. Através dos palestrantes Engº Clovis Gajo e Engº Fabio Miura da SEMIKRON, você poderá aprimorar seus conhecimentos sobre o tema.

Workshop Cooperação Técnica IEE/USP e Consulado Geral dos Estados Unidos em São Paulo-24 Julho, 2019 - 14:00 até 17:00

Workshop Cooperação Técnica IEE/USP e Consulado Geral dos Estados Unidos em São Paulo
Evento  Workshop Cooperação Técnica IEE/USP e Consulado Geral Dos Estados Unidos Em São Paulo
Data: quarta-feira, 24 Julho, 2019 - 14:00 até 17:00 

Workshop Cooperação Técnica IEE/USP e Consulado Geral dos Estados Unidos em São Paulo

 O Instituto de Energia e Ambiente da Universidade de São Paulo e o Consulado Geral dos Estados Unidos em São Paulo, no contexto das atividades de cooperação e difusão de conhecimentos, realizarão um workshop para divulgar as atividades de pesquisa com foco na inserção de sistemas de acumulação no sistema elétrico.

 Data: 24 de julho de 2019 horário: 14h00 às 17h00 local: auditório do IEE/UUSP - Av. Prof. Luciano Gualberto, 1.289 - Cidade Universitária São Paulo

Programação

 14h00 - Apresentação das atividades desenvolvidas no IEE/USP Ildo Sauer, IEE/USP

 14h30 - Energy storage systems for the provision of flexibility to the power grid - current status and trends in the USA Owen Zinaman, Clean Energy Transition Partners

 15h30 - Projeto de P&D do IEE/USP em sistemas fotovoltaicos e armazenamento de energia Marcelo Almeida, IEE/USP

 16h30 - Visita aos sistema de armazenamento e instalações fotovoltaicas do IEE/USP

INSCRIÇÕES NO WEBSITE ORIGINAL:
http://www.iee.usp.br/?q=pt-br/evento/workshop-coopera%C3%A7%C3%A3o-t%C3%A9cnica-ieeusp-e-consulado-geral-dos-estados-unidos-em-s%C3%A3o-paulo

Circuit theory 1 Chapter 5 Problem solving 2- 회로이론1 5장 문제풀이 2-Professor Kim, Myung-Sik- Kumoh National Institute of Technology-SOUTH KOREA

Electronic Engineering -Circuit theory 1 Professor Kim, Myung-Sik- Kumoh National Institute of Technology-SOUTH KOREA

Hightech Marketing-Konkuk University-INSTRUCTOR Yeonghwan Lee

Hightech Marketing-Konkuk University-INSTRUCTOR Yeonghwan Lee Social Science ManagementㆍEconomy International Management; Commerce

 In the midst of the rapid changes of technologies and the market, how a business can attain and increase its competitiveness. This includes discussions on efficient management techniques and some related anecdotes of successes. In the latter part of the semester, social media marketing strategies using some social network services such as Facebook and Twitter will be discessed. If time permits, cult braning and marketing 3.0 will be covered (In the midst of the rapid changes of technologies and the market, how a business can attain and increase its competitiveness. This includes discussions on efficient management techniques and some related anecdotes of successes. In the latter part of the semester, social media marketing strategies using some social network services such as Facebook and Twitter will be discessed. If time permits, cult braning and marketing 3.0 will be covered)

Laplace Equation- MIT OpenCourseWare-Instructor: Gilbert Strang

AUTOMATIC CONTROL-CHAPTER 8 -ROOT LOCUS TECHNIQUE 01-INSTRUCTOR-Kwan-Woong Gwak- Sejong University Mechanical and Aerospace Engineering

AUTOMATIC CONTROL-CHAPTER 8 -ROOT LOCUS TECHNIQUE 01-INSTRUCTOR-Kwan-Woong Gwak- Sejong University  Mechanical and Aerospace Engineering

Course Title
Automatic Control  -Instructor  Kwan-Woong Gwak

This course introduces the basic principles of feedback control of dynamic system, related system analysis technics, and the design of the controller satisfying the given dynamic specifications.
To achieve the course goals, system modeling technics describing the dynamic systems into mathematical differential equations, technics (root locus, Nyquist) analyzing the dynamic characteristics (stability, tranqusient response) in both time and frequency domain will be
studied.
Also, PID and lead-lag controller design method that makes the system dynamic characteristics satisfy the required specifications will beinvestigated.

Main text: Franklin, Powell, Emami-Naeini, "Feedback Control of Dynamic Systems",
7th ed., Pearson Education
reference: Normal S. Nise, "Control Systems Engineering", 5th ed., Wiley
Ogata, "Modern Control Engineering", 4th ed., Prentice Hall

Franklin, Powell, Emami-Naeini, "Feedback Control of Dynamic Systems", 6th ed.,
Pearson Education

LINK FULL COURSE AUTOMATIC CONTROL
http://www.kocw.net/home/search/kemView.do?kemId=1321135

Engineering Mathematics 2 Hanyang University FOURIER SERIES

Digital signal processing -ADVANCED TOPICS ON DSP-Kyungpook National University-OPEN COURSEWARE-INSTRUCTOR HA YEONG-HO- SOUTH KOREA

Lyapunov Function Based Control for Single-Switch Isolated Converters by Seok-Min Wi Department of Electrical Engineering Pohang University of Science and Technology

Lyapunov Function Based Control for Single-Switch Isolated Converters by Seok-Min Wi Department of Electrical Engineering Pohang University of Science and Technology 

A dissertation submitted to the faculty of the Pohang University of Science and Technology in partial fullment of the requirements for the degree of Doctor of Philosophy in the Department of Electrical Engineering Pohang, Korea

 Abstract
 In this dissertation, we propose a Lyapunov function based control scheme for a single-switch isolated converter. A single-switch isolated converter can be designed to operate either in the discontinuous conduction mode (DCM) or in the continuous conduction mode (CCM). Naturally, a single-switch isolated converter operating in di erent modes results in di erent dynamics. When it operates in CCM, it su ers from nonminimum phase behavior due to the occurrence of right-half-plane zeros in its transfer function. When it operates in DCM, it experiences low system gain. Thus, it is di - cult to stabilize the isolated converter operating only in CCM, and both in DCM and CCM. With regard to control design of the single-switch isolated converter, the small signal model around a xed operating point has been popular due to its simplicity. However, linearized model cannot re ect the complete dynamic behavior of the single-switch isolated converter particularly under large perturbations from the operating point. For this reason, it shows poor transient response under large-signal perturbation. Therefore, a nonlinear controller should be developed that does not require any linearization process in case of large-signal perturbation. The Lyapunov function based control strategy, which usually o ers a solution that guarantees global asymptotic stability under large perturbations from the operating point. In constructing the controller, we rst derive the large-signal nonlinear dynamic model of the single-switch isolated converter using averaged state-space modeling technique considering the parasitic components. After that, we develop the duty-ratio feedforward control part and use it to derive the error dynamics. The resulting error dy namic model is then used to develop the Lyapunov function based feedback controller. The proposed control scheme consists of two components: the duty-ratio feedforward control term that helps the output voltage to track the reference voltage, and the Lyapunov function based feedback control term that drives the closed-loop system to become globally exponentially stable. The control system guarantees global exponential stability of the closed-loop system and provides fast transient response under largesignal perturbations. Numerical simulations con rmed its superior performance, and experimental tests validated the proposed control approach.

LINK
http://postech.dcollection.net/public_resource/pdf/200000007651_20190622041129.pdf

Digital signal processing -THE Z TRANSFORM-Kyungpook National University-OPEN COURSEWARE-INSTRUCTOR HA YEONG-HO- SOUTH KOREA

Digital signal processing Kyungpook National University-OPEN COURSEWARE-INSTRUCTOR HA YEONG-HO Engineering> Electrical & Electronics> Electrical Engineering.
The objective of this course is to make students understand and cultivate the principles and applications of digital signal processing in graduate level, and expand the concepts to the advanced topics

Novel Gel Electrolyte for Efficient Rechargeable Battery UNIVERSITY OF WATERLOO

Rechargeable lithium-ion batteries have recently become infamous for causing explosions, and are known to have issues relating to efficiency. With lithium ion-based batteries so prevalent in today’s technology, the need for a safer, more efficient battery is clear.  Rechargeable lithium-ion batteries have recently become infamous for causing explosions, and are known to have issues relating to efficiency. With lithium ion-based batteries so prevalent in today’s technology, the need for a safer, more efficient battery is clear. This Nanotechnology Engineering team has designed a novel aqueous gel electrolyte that includes silica nanoparticles and polyvinyl alcohol (PVA) to reduce corrosion and induce thixotropy, the property of a solution becoming liquid-like when shaken or stirred and solid-like when left alone. This new design will improve upon the safety and efficiency of the lithium-ion battery.
 Capstone Design Team Members: Sunghee (Sydney) Bang, In Sik (Brian) Cho, Jessica Ly, and Hansol (Skylar) Yoo
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Centre for Intelligent Antenna and Radio Systems UNIVERSITY WATERLOO

Centre for Intelligent Antenna and Radio Systems, a world-class research facility, supports transformative national and international industry collaborative activities in radio science and technology. CIARS offers unique prototyping, simulation, and measurement capabilities for integrated antenna and radio system technologies in the MHz to THz bands. CIARS current research targets 5G communication systems, Internet of Things (IoT) networks, next generation mobile satellite communications, advanced sensor devices and novel measurement techniques. Exploring unconventional approaches to meet future challenges in wireless communication, sensing, and imaging.

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