Operation Analysis of Bipolar Low-Voltage DC distribution system based on Distributed Generation

Hardware   configuration .Dual Buck voltage Balancer

Operation Analysis of Bipolar Low-Voltage DC distribution system based on Distributed Generation Han, Tae Hee
Department of Electrical Engineering Graduate School, Myongji University
 Supervised by Prof. Byung Moon Han
The DC distribution has higher efficiency than the AC distribution because it easily controls the power flow in the distributed generators, DC load, and battery storage using single power conversion. However, the DC distribution is not easy to block the fault current and it does not have specific standards compared with the AC distribution, which should be prepared through a lot of technical efforts. The DC distribution is divided into unipolar type and bipolar type. The unipolar type has a positive terminal and a negative terminal, while the bipolar type has a positive terminal, a negative terminal, and the ground terminal. Although the structure of unipolar type is simple, the reliability against fault is rather low. On the other hand, the bipolar type has higher transmission capacity and lower rated voltage of the converter, which secures the cost effectiveness. Also it is possible to form a neutral point with advantages of high reliability and stability. In this thesis, many problems that can occur from the operation of bipolar DC distribution in connection with the AC/DC interconnection operation were analyzed. The energy management method for the AC/DC power trade and the operational principle of distributed generator and energy storage were analyzed. In order to analyze the operation and performance of unipolar distribution system, a 3kW-class hardware simulator was built, which is composed of the grid-tied three-level inverter, battery storage, super capacitors, and the voltage balancer. Also the various analysis results through experiments with hardware simulator were described by a variety tests of produces hardware are described.
THESIS LINK
http://www.mediafire.com/view/iyq0ziqvjxq269y/Operation_Analysis_of_Bipolar_Low-Voltage_DC_distribution_system_based_on_Distributed_Generation-2014.pdf

Analysis of PWM Inverter Characteristics for High-Speed Train Drive System

Analysis of PWM Inverter Characteristics for High-Speed Train Drive System
AUTHOR SOON HWAN KWON
MAJOR IN ELECTRICAL ENERGY AND NEW TECHNOLOGY ENG.
DEPT. OF ELECTRONICS AND ELECTRIC ENG.
THE GRADUATE SCHOOL CHUNG-ANG UNIVERSITY

( Abstract )
Interior permanent magnet synchronous motor is in the limelight as traction motor because it has advantages of miniaturization, reducing weight, and saving on maintenance costs. Because high-speed trains are large capacity loads, it is necessary to establish the design and development of inverter topology for driving IPMSM. NPC 3-level inverter has a high voltage rating and low harmonic, and can implement large capacity power conversion system. Also, it is easy to miniaturize and reduce weight because it does not need additional capacitors in comparison with other multilevel inverter topology. In this study, speed control of the IPMSM drives for the next generation domestic high-speed train system using 2-level inverter and NPC 3-level inverter is presented. Simulators of the system are implemented and simulations are performed. Finally, the designed systems are verified by comparison between simulations and experiments.
LINK THESIS
https://www.mediafire.com/?mopph11g5iju1bj

A PWM control strategy for low-speed operation of three-level NPC inverter Department of Electrical and Computer Engineering Graduate School, Pusan National University

 

A PWM control strategy for low-speed operation of three-level NPC inverter based on bootstrap gate drive circuit
Jun-Hyung Jung
Department of Electrical and Computer Engineering Graduate School, Pusan National University Abstract
This paper proposes the pulse with modulation (PWM) control strategy for low- speed operation in the three-level neutral-point-clamped (NPC)inverters based onthe bootstrap gate drive circuit
FULL THESIS
https://www.mediafire.com/?4qfn7i7ell3f8uf

Back-to-Back NPC Switching Technique to Reduce Power Loss of Back-to-Back NPC System for Offshore Wind Farm 2013

Switching Technique to Reduce Power Loss of Back-to-Back NPC System for Off shore Wind Farm HongSeok-Jin
Mechatronics Engineering Cooperation Course Sungkyunkwan University
ABSTRACT
 In this paper,3-LevelNPC is applied as Back-to-Back foroffshore wind farm topology using PMSG.In caseofapplying 3-LevelNPC,each switch can withstand higher voltage than existing 2-Levelinverter,but overallloss of power converters is dramatically increased because amount of switching elemenT is increased.Thus,new switching method issuggested for 3-LevelNPC VSC If suggested method is applied,loss in NPC is minimized.
FULL THESIS
https://www.mediafire.com/?9fyma5k7jvdg4gl

ZVT Resonant Boost Converter with New Auxiliary Circuit Kim Mo Se Dept. of Mechatronics Engineering Sungkyunkwan University 2013

ABSTRACT
Switch mode power supplies have become smaller and lighter due to higher switching frequency. However, higher switching frequency causes lots of periodic losses at switch turn-ON and turn-OFF,resulting in increasing losses of the whole system.Therefore,many converters have been presented that use resonance circuit to reduces witching losses. In this paper,A new zero voltage transition resonant boost converter is proposed.The conventional boost converter generates switching losses at turn ON and OFF,and this causesa reduction in the whole system’sefficiency.The proposed ZVT resonant boost converter utilizes a  method using an auxiliary circuit with a resonant inductor,capacitor and two auxiliary switch. Therefore the proposed zero voltage transition n resonant boost converter reduces switching losses more than the conventional hard switching converter. Also,the experimentis conducted with the 4[kW],30[kHz]converter which steps up the voltage from 200[V]to 400[V].It is confirmed that the result of the experimentand that of the simulation are same,and the validity of the converter is verified.
FULL THESIS
https://www.mediafire.com/?m14iamz6pzj6kj7

The integrated Operation and Design of the DC Distribution Systems combined Wind Turbine and Photovoltaic Power Systems-ANPC BACK TO BACK CONVERTER

The integrated Operation and Design of the DC
Distribution Systems combined Wind Turbin and
Photovoltaic Power Systems
Shin,Soo Cheol
Department of Electrical and
Computer Engineering
Sungkyunkwan University
FULL PAPER
https://www.mediafire.com/?mf2v9343a99mro1

A Study on the Analysis and Improvement of Power Quality Using Real-time Simulator in Distribution System with Distributed Generation AnHeeJin Interdisciplinary Program in Photovoltaic System Engineering The Graduate School of Sungkyunkwan University

ABSTRACT
The distributed generation has been increased significantly.However,there
are some problems caused by distributed generation such as reverse power flow,
voltage fluctuation and harmonics when it is connected to the distribution
system.Also,we observed the voltage fluctuation in the distribution system
with distributed generation.This paper analyzes the voltage fluctuation according
to the output fluctuation of distributed generation and presents a study on
D-STATCOM which is a shuntdevice used to compensate powerquality on
distribution lines using real-time simulator.The modeling ofthe distribution
system with distributed generation is modeled by using SIMULINK software.
FULL THESIS
LINK1
ftp://dcollection.skku.edu/dcoll/data/service/000000038/000000038744.pdf

Output Filter Design of Grid-Connected Inverter for High Power Offshore Wind Power System

Output Filter Design of Grid-Connected Inverter for High Power Offshore Wind Power System
 The output filter design for high power grid-connected inverter of offshore wind-turbine has many limitations such as low switching frequency, allowable DC-voltage, and the component volume and weight. In addition, the injected harmonic current into the grid is constrained by various grid connection requirements. This paper compared and weighed with several harmonic regulations and suggested the optimal design procedure of the output filter compliance with the grid code using spectrum analysis of inverter output voltage that contains harmonics. In this paper, the output filter of grid connected inverter for 7MVA offshore wind power system is designed to meet the BDEW harmonic currents limits and the IEEE 519-1992 requirements. The performance of the designed output filter is validated by extensive simulations using Matlab/Simulink.
FULL THESIS
https://www.mediafire.com/?z4tizq8in557vih

PWM RECTIFIER WITH ACTIVE FILTERING PHD THESIS M.SC. MARIUSZ CICHOWLAS WARSAW UNIVERSITY OF TECHNOLOGY

 WARSAW UNIVERSITY OF TECHNOLOGY
FACULTY OF ELECTRICAL ENGINEERING
INSTITUTE OF CONTROL AND INDUSTRIAL ELECTRONICS
PHD. THESIS
M.SC. MARIUSZ CICHOWLAS
PWM RECTIFIER WITH ACTIVE FILTERING
 FULL THESIS HERE:
http://www.isep.pw.edu.pl/icg/pdf/phd/mariusz_cichowlas.pdf

Análisis de Redes Eléctricas 1-Circuitos Trifásicos Sesión 8 1/13

HIHG POWER FACTOR SINGLE PHASE AC/DC CONVERTER DESIGN WITH A NEW HYSTERESIS CONTROL METHOD

FULL PAPER LINK

https://www.mediafire.com/?bov443oswmwqbm6 

 

SEMINARIO SISTEMAS DE ALIMENTACION ININTERRUMPIDA UPS-AVANCES TECNOLOGICOS FACULTAD DE INGENIERIA ELECTRONICA UNMSM PERU 2013

 

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ENERO DE 2013 FACULTAD DE INGENIERIA ELECTRONICA UNIVERSIDAD NACIONAL MAYOR DE SAN MARCOS LIMA PERU

A Review of High-Frequency Power Distribution Systems: For Space, Telecommunication, and Computer Applications

Praveen Jain, Fellow, IEEE, Majid Pahlevaninezhad, Member, IEEE, Shangzhi Pan, Member, IEEE, and Josef Drobnik, Senior Member, IEEE
Abstract—High-frequency AC (HFAC) power distribution systems have been the subject of great interest over the last several decades. This paper presents a thorough review of different HFAC power distribution architectures on which the authors haveworked in the last 30 years. The review is focused on the HFAC power architectures and topologies for space, telecommunications, and computer applications. Detail of each architecture is given and evaluated in terms of performance specific to each application.

 

FULL PAPER
https://www.mediafire.com/?9r1n6z43bb2kha7

COMPENSAÇÃO DA FORMA DE ONDA DE UM INVERSOR PWM UTILIZANDO UMA TÉCNICA DE CONTROLE REPETITIVO Vinícius Cordeiro Durães Araújo -UFMG-BRASIL

Universidade Federal de Minas Gerais
Escola de Engenharia
Programa de Pós-Graduação em Engenharia Elétrica

COMPENSAÇÃO DA FORMA DE ONDA DE UM INVERSOR PWM
UTILIZANDO UMA TÉCNICA DE CONTROLE REPETITIVO


Vinícius Cordeiro Durães Araújo
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

Orientador: Prof. Porfírio Cabaleiro Cortizo
Belo Horizonte - MG-BRASIL
Agosto de 2011

RESUMO
Os inversores para sistemas UPS devem fornecer uma tensão de saída regulada e com baixo valor de distorção harmônica total (THD - Total harmonic distortion). Este trabalho apresenta um estudo de diversas técnicas de controle para o estágio de saída de um sistema UPS. Foi realizada uma pesquisa bibliográfica de estratégias de controle que contemplam este objetivo. A utilização de uma técnica de controle digital para regular o valor RMS da forma de onda associada com a ação integral repetitiva é avaliada para inversores PWM de baixo custo. Como resultado da ação integral repetitiva, esta estratégia de controle digital reduz o erro de regime permanente e as distorções causada por perturbações periódicas tais como cargas não lineares. Além disso, a técnica de controle digital analisada mede apenas a tensão de saída, reduzindo o custo com sensores.

LINK
http://www.bibliotecadigital.ufmg.br/dspace/bitstream/handle/1843/BUOS-98KJJ7/199m.pdf?sequence=1

FIABILIDAD EN UN SISTEMA ALIMENTACION ININTERRUMPIDA UPS-RAFAEL ESPARZA-SALVADOR MARTINEZ

FIABILIDAD EN UN SISTEMA ALIMENTACION ININTERRUMPIDA UPS-RAFAEL ESPARZA-SALVADOR MARTINEZ
REVISTA MUNDO ELECTRONICO-1976-No 49
ARTICULO COMPLETO:https://www.mediafire.com/?kf26xmzaya6ytr8

ESTABILIZADORES DE CORRIENTE ALTERNA POR PASOS CON INTENSIDAD DE CORRIENTE COMPARTIDA

 

ESTABILIZADORES DE CORRIENTE ALTERNA POR PASOS CON INTENSIDAD DE CORRIENTE COMPARTIDA SALVADOR MARTINEZ GARCIA REVISTA MUNDO ELECTRONICO-1986-No 166
FACULTAD INGENIERIA ELECRONICA -UNIVERSIDAD NACIONAL MAYOR DE SAN MARCOS-LIMA -PERU
LINK FULL PAPER:https://www.mediafire.com/?p2quca9umctcp89

High Power Density Power Electronic Converters for Large Wind Turbines Osman Selcuk Senturk

Dissertation submitted to Faculty of Engineering, Science, and Medicine at Aalborg University in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Electrical Engineering Aalborg University Department of Energy Technology Aalborg, Denmark Aalborg University Department of Energy Technology Pontoppidanstraede 101 9220 Aalborg East Denmark Phone: +45 9940 9240 Fax: +45 9815 1411
Web: http://www.et.aau.dk
link
 https://www.mediafire.com/?9emgfz1dw3gku88

Uma contribuição para a área de saúde por meio da verificação do impacto da qualidade de energia e das instalações elétricas nos equipamentos eletromédicos-RAMOS MARIO CESAR TESE DOUTORADO USP-SISTEMAS DE POTENCIA

LINK THESIS
 Tese_versaofinal.pdf (6.68 Mbytes)
 ONDA DE TENSÃO E CORRENTE EQUIPAMENTO DE RESSONANCIA
MAGNETICA NUCLEAR  PHILIPS  MODELO HR8552  TRIFASICO 380VAC

CORRENTE NO MODO CONTINUO (STAND-BY) E CORRENTE DURANTE EXAME

Uma contribuição para a área de saúde por meio da verificação do impacto da qualidade de energia e das instalações elétricas nos equipamentos eletromédicos

Tese de Doutorado

Autor

Ramos, Mário César Giacco (Catálogo USP)

Nome completo

Mário César Giacco Ramos

Unidade da USP

Escola Politécnica

Área do Conhecimento

Sistemas de Potência

Data de Defesa

2009-04-29

Orientador

Tahan, Carlos Márcio Vieira (Catálogo USP)

LINK THESIS
 Tese_versaofinal.pdf (6.68 Mbytes)

IP 65, IP66, IP67… O que significa?

Líquidos, segundo dígito

FONTE ORIGINAL
http://blog.bcend.com.br/ip-65-ip66-ip67-o-que-significa/

IP 65, IP66, IP67… O que significa? International Protection, Proteção Internacional

Usuários de equipamentos industriais constantemente se deparam com um IP seguido de dois dígitos e, muitas vezes, não sabem o que significam ou qual a diferença entre um e outro.
O código ou classificação IP (IP pode significar Ingress Protection, Proteção contra Ingresso, ou International Protection, Proteção Internacional) foi criado pela Comissão Internacional de Eletrotécnica – IEC – para determinar critérios de ingresso de materiais sólidos e líquidos em equipamentos elétricos protegidos mecanicamente por algum tipo de carcaça, conforme norma 60529. Cada número representa a resistência a uma condição padrão: o primeiro dígito representa a ingresso de elementos sólidos – inclusive partes do corpo, como dedos – e o segundo dígito representa a entrada de elementos líquidos. Quanto maior o número, maior sua a resistência ao ingresso de corpos estranhos.
Letras adicionais podem ser inseridas para determinar outras condições sob as quais o equipamento foi submetido.
Veja a tabela a abaixo para maiores detalhes:
Sólidos, primeiro dígito