Power Electronics Technology] Xi'an Jiaotong University丨Course ware Included [6.1.1]--AC voltage regulation circuit AC-AC CONVERTER-PART1-【电力电子技术】西安交通大学丨含课件 [6.1.1]--交流调压电路与其他交流电力控制电路-1

 

Paralelismo de inversores de tensão aplicado a Nobreaks: teoria, estratégias de controle e exemplo de projeto-Autor: Telles B. Lazzarin Ano: 2012 - INSTITUTO FEDERAL SANTA CATARINA-BRASIL

 EXCELENTE APORTE CIENTIFICO DO DR. TELLES B. LAZZARIN UM LIVRO ESPECIALMENTE UTIL PARA ESTUDANTES,ENGENHEIROS DE GRADUAÇÃO E POS-GRADUAÇÃO DE ENGENHARIA ELETRICA E ELETRÔNICA

President of the Brazilian Association of Power Electronics (SOBRAEP) Coordinator of the Postgraduate Program in Electrical Engineering at UFSC (PPGEEL) Professor at the Federal University of Santa Catarina (UFSC) Universidade Federal de Santa Catarina Universidade Federal de Santa Catarina Santa Catarina, Brazil.

LIVRO PDF COMPLETO:

https://www.ifsc.edu.br/documents/30701/523474/Paralelismo+de+Inversores+de+Tens%C3%A3o.pdf/91102ec6-4064-b5c7-05f2-3bfa092f0cdc

An Active AC Grid to DC Microgrid Interface Using a Bidirectional Bridgeless Flyback Converter Pablo J. Quintana-Barcia*, Jorge Garcia, Manuel Rico-Secades and Emilio L. Corominas University of Oviedo, Department of Electrical, Electronic, Computers and Systems Engineering, Spain

 An Active AC Grid to DC Microgrid Interface Using a Bidirectional Bridgeless Flyback Converter Pablo J. Quintana-Barcia*, 

 Abstract The usage of power electronics in power systems is one of the key techniques for boosting the development of microgrids. Particularly, in the case of public lighting systems, power electronics converters are applied to both the LED driving stage and the grid interfacing stage. From the point of view of the grid, the latter stage usually behaves as a high power factor (PF) load. However, recent trends in these systems imply a manifold of different storage and renewable energy microgeneration units connected to the DC bus of each street lamp. All together are usually known as lighting smartgrids. The present work aims for keeping the DC bus stable, injecting or extracting energy whereas maintaining high PF with respect to the AC grid. This idea is performed by means of a power droop control that provides the current reference to the grid-tie power converter: a bidirectional bridgeless discontinuous conduction mode (DCM) Flyback converter. This paper defines, explains and implements a power droop control as well as a novel unified switching pattern for the bidirectional DCM Flyback converter, suitable for both inverter and rectifier operating modes. Another contribution is that the proposed switching pattern enables for a smooth transition between these modes. The proposed strategy provides the pulses for every switch at the interfacing stage in the adequate sequence, thus simplifying the design and implementation of the power and control stages. The proposed switching pattern is validated through experimental results.

VIEW FULL TEXT:

https://www.scitechnol.com/peer-review/an-active-ac-grid-to-dc-microgrid-interface-using-a-bidirectional-bridgeless-flyback-converter-aqU1.php?article_id=6749

Input Stage with Double Functionality Applied to a High Performance Three-Phase UPS William A. Venturini, Henrique Jank, Fábio E. Bisogno, Mário L. S. Martins, Humberto Pinheiro ESTÁGIO DE ENTRADA COM DUPLA FUNCIONALIDADE APLICADO A UMA UPS TRIFÁSICA DE ALTO DESEMPENHO William A. Venturini, Henrique Jank, Fábio E. Bisogno, Mário L. S. Martins, Humberto Pinheiro Universidade Federal de Santa Maria, Santa Maria – RS, Brasil

 

Desempenho Input Stage with Double Functionality Applied to a High Performance Three-Phase UPS William A. Venturini, Henrique Jank, Fábio E. Bisogno, Mário L. S. Martins, Humberto Pinheiro ESTÁGIO DE ENTRADA COM DUPLA FUNCIONALIDADE APLICADO A UMA UPS TRIFÁSICA DE ALTO DESEMPENHO William A. Venturini, Henrique Jank, Fábio E. Bisogno, Mário L. S. Martins, Humberto Pinheiro Universidade Federal de Santa Maria, Santa Maria – RS, Brasil e-mail: {williamventurini, hiquejank, fbisogno, mariolsm, humberto.ctlab.ufsm.br}@gmail.com

 Resumo – Este trabalho apresenta uma configuração topológica que permite utilizar o estágio de entrada de uma UPS de dupla conversão como retificador trifásico, em modo normal de operação, e como conversor CC/CC elevador de tensão, em modo bateria. Dessa forma, evita-se o uso de um circuito específico para a descarga do banco de baterias, o qual deve ser dimensionado para a potência nominal da UPS. É apresentada a análise de funcionamento do estágio de entrada proposto, bem como a modelagem matemática e o sistema de controle que garantem a aplicabilidade na correção do fator de potência de entrada, no controle da tensão de barramento e ainda no equilíbrio das tensões sobre os capacitores de barramento. A metodologia desenvolvida e a boa performance do sistema proposto são validados através de resultados obtidos em uma plataforma hardware-in-theloop, modelo Typhoon HIL402. Os resultados são adquiridos para uma UPS trifásica de 20 kVA. 

INPUT STAGE WITH DOUBLE FUNCTIONALITY APPLIED TO A HIGH PERFORMANCE THREE-PHASE UPS Abstract – This work presents a topological configuration that allows the input stage of a double conversion UPS to be used as a three-phase rectifier and a DC/DC voltage boost converter in normal and backup operating mode, respectively. Thus, the use of a specific circuit for the discharge of the battery bank, which would be rated for UPS nominal power, is avoided. The operation analysis of the proposed input stage is presented, as well as the mathematical modeling and the control system that guarantee the applicability in the input power factor correction, DC bus voltage control and for the DC bus capacitors voltage balance. Hardware-in-the-loop results are acquired for a 20 kVA three-phase UPS to validate the developed analysis besides to demonstrate the good performance of the system.

VIEW FULL PAPER PAGE 244-255: https://sobraep.org.br/site/uploads/2019/04/rvol23no02.pdf

Isolated Single-stage Three-phase AC/DC Converter using Bidirectional Switches Ramandeep Narwal† , Isaac Wongx , Subhashish Bhattacharya‡ , B. Jayant Baliga§ and Douglas C. Hopkins∗ FREEDM Systems Center, Department of Electrical and Computer Engineering North Carolina State Univers

 

Isolated Single-stage Three-phase AC/DC Converter using Bidirectional Switches Ramandeep Narwal† , Isaac Wongx , Subhashish Bhattacharya‡ , B. Jayant Baliga§ and Douglas C. Hopkins∗ FREEDM Systems Center, Department of Electrical and Computer Engineering North Carolina State University Raleigh, NC 27695, USA

 Abstract—The advent of the SiC Bidirectional FET (BiDFET), a monolithic 1.2 kV bidirectional switch, has rendered the single-stage three-phase AC/DC converter topology a promising approach for implementing AC/DC converters. This topology, which integrates a full-bridge converter with a single-phase to three-phase matrix converter via a high-frequency transformer, is particularly suitable for applications requiring galvanic isolation, buck-boost functionality, and bidirectional power flow. The single-stage design eliminates the need for bulky and unreliable electrolytic capacitors, and utilizes a single magnetic component for power transfer. In the matrix converter, bidirectional switches, which were traditionally implemented using combinations of multiple semiconductor devices such as MOSFETs, IGBTs, and diodes, can now be realized using the single-chip solution, BiDFET. This advancement leads to a lower switch count, compact converter implementation, with lower inductance commutation cells, thereby enhancing the overall efficiency and compactness of the system. The paper presents a unified model of the converter, considering all control parameters, including the duty cycles and phase shift of transformer voltages. Detailed expressions for power transfer, transformer currents, and currents at AC and DC ports are provided. Additionally, the paper outlines the conditions necessary for soft-switching of all switches and the commutation schemes required for the practical implementation of the matrix converter modulation scheme. A hardware prototype of a 10 kW, 480 VRMS, LL/ 800 V AC/DC system has been developed, and experimental results are presented to demonstrate its performance.

VIEW FULL PAPER: https://www.osti.gov/servlets/purl/2324747