A New Synchronization Technique of a Three-Phase Grid Tied Inverter for Photovoltaic Applications Mohannad JabbarMnati ,Dimitar V. Bozalakov and Alex Van den Bossche1

Figure 1 :The analog circuit of DISM (a) single phase circuit

Figure :The analog circuit of DISM (b) three-phase circuit

A New Synchronization Technique of a Three-Phase Grid Tied Inverter for Photovoltaic Applications Mohannad JabbarMnati ,Dimitar V. Bozalakov and Alex Van den Bossche

 Department of Electronic Technology, Institute of Technology Baghdad, Middle Technical University

 Three-phase grid synchronization is one of the main techniques of the three-phase grid connected power inverters used in photovoltaic systems. This technique was used to reach the fast and accurate three-phase grid tied inverter synchronization. In this paper a new synchronization method is presented on the basis of integrating the grid voltage two times (line-to-line or phase voltage).This method can be called “double integral synchronization method” (DISM) as it integrates the grid voltage signals two times to generate the reference signals of three-phase photovoltaic inverter currents. DISMis designed and simulated in this paper to operate in both analog and digital circuits of three-phase photovoltaic inverter system with the same topology.The digital circuit design and dsPIC33FJ256GP710A as a microcontroller (the dsPIC33FJ256GP710A with the Explorer 16 Development Board from microchip) was used practically in this paper to generate and control the sine pulsewidth modulation (SPWM) technique according to DISM for three-phase photovoltaic inverter system. The main advantage for this method (DISM) is learning how to eliminate the integration constant to generate the reference signals without needing any reference signals or truth table, just the line-to-line or phase voltage of grid.

LINK:https://biblio.ugent.be/publication/8569474/file/8569476.pdf

First Emirati astronaut Hazzaa AlMansoori and team enter ISS, make history for United Arab Emirates

Three space travelers, including NASA astronaut Jessica Meir, Oleg Skripochka of the Russian space agency Roscosmos and spaceflight participant Hazzaa Ali Almansoori from the United Arab Emirates, launched to space at 9:57 a.m. EDT on Wednesday, Sept. 24, 2019, for a nearly six-hour ride to the International Space Station. 

 UAE makes history with the launch of Hazzaa AlMansoori to space. The Soyuz spacecraft carrying him and two other astronauts had blasted off to the International Space Station from Baikonur Cosmodrome in Kazakhstan. The spacecraft successfully docked at ISS in about 6 hours after blast off and the Emirati austronaut and other crew members entered International Space Station. Here's how the events unfolded. AlMansoori is set to participate in the Station's ongoing scientific missions. He'll observe the effect of microgravity and conduct 15 experiments designed by UAE school students, selected from the MBRSC's "Science in Space" competition. Back on Earth, those students will also conduct those same experiments to compare the results with those done in space. And AlMansoori has plenty of material that he'll be taking with him.

Conheça a Telha Solar -A novidade que parou a Intersolar 2019-São Paulo-BRASIL

BAIXE O DATASHEET:
 https://static.wixstatic.com/ugd/b683ff_1138043cc69c4b17bef9116829beb3bf.pdf

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Fórum Potência SÃO PAULO 24 de setembro de 2019 Horário: 8h00 às 18h00 CENTRO DE CONVENÇÕES REBOUÇAS Endereço: Av. Rebouças, 600 Pinheiros – São Paulo (SP)

Fórum Potência SÃO PAULO 24 de setembro de 2019 Horário: 8h00 às 18h00 CENTRO DE CONVENÇÕES REBOUÇAS Endereço: Av. Rebouças, 600 Pinheiros – São Paulo (SP)

 O Fórum Potência é idealizado e dirigido pelo Prof. Hilton Moreno e o Jornalista Marcos Orsolon

Prof. Hilton Moreno 
Engenheiro Eletricista pela Escola Politécnica da Universidade de São Paulo; Diretor da Revista Potência; Membro do Comitê Brasileiro de Eletricidade da ABNT; Professor universitário; Palestrante em congressos, seminários e cursos no Brasil e no exterior; Autor e coautor de várias publicações; consultor de empresas.

Marcos Orsolon
Jornalista pela Universidade São Judas Tadeu; Diretor da Revista Potência; Ex-editor da Revista Anamaco; Ex-editor do Jornal República da Mooca; Ex-editor do Jornal Folha da Capital

 Programa do evento 
08h00 – 08h30: Credenciamento
 08h30 – 09h00: Abertura com participação do Eng. Vinicius Marchese Marinelli, presidente do CREA-SP
 09h00 – 09h30: Conceitos de proteção elétrica e geração fotovoltaica para instalações de baixa tensão | Tiago Dalzochio, especialista da SOPRANO
 09h30 – 10h00: Soluções fotovoltaico | Loris Andreoli e Renan Juliatti, especialistas CHINT
 10h00 – 10h30: Soluções em atendimento e mix de produtos Etil | Julio Cesar Theodoro Junior, especialista da ETIL
 10h30 – 11h15: Intervalo
 11h15 – 11h45: Soluções descentralizadas na indústria de máquinas | Rogério Cantelli, especialista da WEIDMÜELLER CONEXEL
 11h45 – 12h15: Indústria 4.0 na Distribuição de Energia | Pedro Okuhara, especialista da MITSUBISHI ELECTRIC
 12h15 – 12h45: MÚTUA e os benefícios para os profissionais do CREA | Aldo Leopoldo Rosseto Filho, especialista da MÚTUA-SP
 12h45 – 14h00: Intervalo
 14h00 – 14h30: Plataforma BIM / Biblioteca para o Revit | Fábio Itiro Sato, consultor da DUTOTEC 14h30 – 15h00: Manutenção e substituição de Semicondutores de Potência em Inversores e Soft Starters | Rivaldo Caram e Sr. Clóvis Gajo, especialistas da SEMIKRON
 15h00 – 15h30: Solução em segurança e instalação elétrica industrial – seus conceitos, mitos e realidade | Marcos Leandro Oliveira, especialista da TRAMONTINA ELETRIK
 15h30 – 16h15: Intervalo
 16h15 – 16h45: A evolução do uso da imagem térmica | Vitor Unterkicher, especialista da FLIR 16h45 – 17h15: especialista da STECK
 17h15 – 17h45: Regras de ouro para instalação de cabos elétricos em instalações fotovoltaicas | Hilton Moreno, consultor da COBRECOM
 17h45 – 18h15: Vícios e problemas encontrados nas instalações elétricas fotovoltaicas no Brasil | Hilton Moreno, professor, diretor da REVISTA POTÊNCIA, consultor do PROCOBRE 18h15: Sorteio de brindes – encerramento
LINK PARA INSCRIÇÃO GRATUITA
https://revistapotencia.com.br/forum-potencia-sao-paulo-2019/

Advanced Grid-Tied Photovoltaic Micro-Inverter Yuheng Lu-Electrical and Computer Engineering at the University of Canterbury, Christchurch, New Zealand. 2015

Advanced Grid-Tied Photovoltaic Micro-Inverter -Yuheng Lu
 A thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering in Electrical and Computer Engineering at the University of Canterbury, Christchurch, New Zealand. 2015

ABSTRACT 
Along with the damaged environment and the emerging energy crisis, many problems have been caused by utilizing fossil fuels. Green energy, also known as renewable energy, has been trusted as a good alternative for the conventional energy resources and e ort has been contributed in the development of modern green energy. Solar energy is one of the renewable energy resources. Owing to its advantages of being nearly unlimited, pollution free, noise free and relatively easy to maintain, photovoltaic (PV) systems have experienced a signi cant increase in the past few decades. In this thesis, a grid-tied solar micro inverter has been presented and several key technology issues on this PV system are investigated: 1. Maximum power point tracking (MPPT) strategies. Under changing atmospheric conditions, intensity of the sunlight irradiation and shading problems, the output of a solar panel varies nonlinearly. MPPT techniques are designed to enable PV panels always operate at the optimal power point and produce maximum power. In this paper, di erent MPPT strategies are compared and analysed. An improved variable step-size P&O MPPT strategy is also proposed to compensate those drawbacks from conventional MPPT techniques. Simulation results are also given. 2. Control strategies of a single-phase grid-tied inverter. A deadbeat controller, named the OSAP control, is proposed for the inverter. This inverter is analysed into two states: standalone inverter and grid-tied inverter. In each state, the OSAP controller is applied to control the inverter. Some disadvantages are also shown for the OSAP controllers. An improved OSAP controller is then introduced to compensate these drawbacks. Simulation results are given to support the theory. 3. Experiment of this solar inverter. An interleaved boost converter is shown to implement the MPPT techniques. Experiments of the stand-alone inverter and grid-tied inverter are also conducted with the OSAP control strategies. The experiment of this PV system under some environmental changes are also conducted and the transient response is given. Chapter 1 deals with the background introduction and literature review. A model of solar cell is introduced in Chapter 2 and the simulation model is also built to analysis the characteristics of solar panel output power. Several Maximum Power Point Tracking (MPPT) techniques are evaluated and an improved variable step-size MPPT technique is proposed to overcome the iv ABSTRACT disadvantages. In Chapter 3, a control strategy is developed for a grid-tied PV micro-inverter, which is called one-sampling-ahead-preview (OSAP) control. Firstly a full-bridge inverter is analysed. Two states of this inverter are introduced, one is the stand-alone inverter and the other is the grid-tied inverter. Mathematical and simulation model have been built for each inverter. Then an OSAP voltage controller is proposed for the stand-alone inverter and an OSAP current controller is proposed the grid-tied inverter. However, since OSAP controllers belong to the deadbeat control category, these exists a deadbeat response in the output. And another problem is that OSAP controllers highly depend on the inverters have accurate parameters for the components, which is not practical in real life. So an improved OSAP controller is introduced to solve these problems, which is the OSAP with a resonant controller. Simulation results are also given to support the theory. In Chapter 4, the experiment of this system has been shown and experimental results have been provided. Chapter 5 explains the conclusions and some developments need to be done in the future work.
LINK:https://pdfs.semanticscholar.org/8747/aa104a8bbf6dca1d09b391588ae7017df94e.pdf