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A fast space-vector algorithm for common-mode voltage elimination in multilevel converters

A fast space-vector algorithm for common-mode voltage elimin...

引用

Brazilian Power Electronics Conference, COBEP

作者： Luis G. G. P. de Castro Maurício B. R. Corrêa Cursino B. Jacobina Post-Graduate Program in Electrical Engineering - PPgEE- COPELE Electrical Engineering Department (DEE) Federal University of Campina Grande Campina Grande PB Brazil

This paper presents an approach that allows to apply space-vector modulation strategy to eliminate common-mode voltage in multilevel inverters. The strategy is based on the reduction of the space vector diagram and on the choice of switching states in which the common-mode voltage is zero. Results were obtained with a real-time simulator and an experimental platform of a cascaded inverter up to 11-level shows its effectiveness. The influence of dead-time over the algorithm performance is investigated too.

关键词： Inverters Vectors Switches Modulation Equations Mathematical model Switching frequency

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Models of Transit Systems for Optimization of the Grounded Vehicles Fleet

Models of Transit Systems for Optimization of the Grounded V...

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International Conference on computer Modeling and Simulation, UKSIM

作者： José Artur Lima Cabral Marques Fábio Nogueira da Silva João Viana da Fonseca Neto UNDB Sao Luis Maranhao Brazil DEE-Post Graduate Program in Electrical Engineering and Computer Science-PPGEE Universidade Federal do Maranhão Sao Luis Maranhao Brazil

In order to operate a public transportation system, it is necessary to plan the grounded fleet lines among the various origin/destination spread all over the city to better attend population displacement during the day, which uses the bus transportation system. To improve planning operation of the public transportation system, it is proposed a linear programming model to optimize the overall performance of transit systems, by setting the optimum buses fleet for every bus line of each company constrained to an accepted delay between any two bus stop on the bus circuit but with a minimum profit for the companies. As the routes are different for time to time during the day such as rush hour. The proposed model can cope with all the kinds of patterns during the day and the propose is to optimise the whole transportation system. It is discussed also the complexity of the nature of the dynamic of the transportation system. The mathematical modelling can show us correctly a way to qualify and quantify the routes, what helps to understand the dynamic behavior of the population through time, different situations and epochs. Simulations present the viability of implantation for real time system to estimate the transportation system as it changes.

关键词： Optimization Sociology Statistics Linear programming Vehicles Adaptation models

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Shunt Compensator Based on Three-Phase Interconnected Converters

Shunt Compensator Based on Three-Phase Interconnected Conver...

引用

IEEE Energy Conversion Congress and Exposition

作者： C. B. Jacobina E. L. L. Fabricio A. V. G. Menezes M. B. R. Correa G. A. A. Carlos Post-Graduate Program in Electrical Engineering - PPgEE - COPELE Electrical Engineering Department (DEE) Federal University of Campina Grande (UFCG) 58429-900 Campina Grande - PB - Brazil

ISBN: (纸本)9781479903375

This paper investigates a three-phase shunt power filter based on three standard three-phase interconnected converters. Compared with the usual three-phase shunt filter, the proposed converter permits to reduce the dc-link voltages and reduce either harmonic distortion or switching frequency. Control strategies suitable to control the filter and circulating currents as well as the three dc-link voltages are presented. A PWM strategy is designed to command the converter according to the reference voltage generated by the controllers. Simulation and experimental results are presented.

关键词： standard three-phase three reference Converters voltage reference circulating current shunt Shunts (electrical) link voltage Harmonic distortion DC link Filters DC link voltage VOLTAGE

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AC-AC DRIVE SYSTEMS WITH OPEN-END FIVE-PHASE MACHINE AND SIXTEEN-LEG DC-LINK CONVERTER

AC-AC DRIVE SYSTEMS WITH OPEN-END FIVE-PHASE MACHINE AND SIX...

引用

Brazilian Power Electronics Conference

作者： Cursino B. Jacobina Isaac S. de Freitas Lilian G. de Azevedo Mauricio B. R. Correa Post-Graduate Program in Electrical Engineering - PPgEE - COPELE Electrical Engineering Department - DEE - Federal University of Campina Grande - UFCG Alternative and Renewable Energy Center - CEAR Electrical Engineering Department - DEE - Federal University of Paraiba - UFPB

ISBN: (纸本)9781479902712

This paper presents two ac machine drive systems based on three-phase to five-phase ac-ac converters and open-windings five-phase machine. The drive systems are suitable to applications in which high power, performance and reliability are required using low power and voltage switches and low dc-link capacitor voltages. The configuration I employs an input transformer with two secondary taps at the grid side, two three-phase three-leg converters and one ten-leg converter (totalling sixteen legs). The configuration II employs a low-power series transformer at the grid side, two three-phase three-leg converters, and one ten-leg converter. Both configurations permit to reduce the power and voltage ratings of power switches and also the dc-link capacitor size. The paper presents the comprehensive models of the proposed systems, modulation strategies and a general comparison with conventional configuration. Simulated and experimental results are presented.

关键词： Ac-Ac Converter Five-phase Machine Motor Drive Open-end windings Power Converter

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Unidirectional rectifier based on hybrid modular multilevel cascade converter — Double-star chopper-cells

Unidirectional rectifier based on hybrid modular multilevel ...

引用

Brazilian Power Electronics Conference, COBEP

作者： Italo Roger F. M. P. da Silva Alexandre C. Oliveira Cursino B. Jacobina Camila S. Gehrke Post-graduate Program in Electrical Engineering - PPgEE/COPELE Department of Electrical Engineering (DEE) Federal University of Campina Grande (UFCG) Aprígio Veloso Campina Grande-PB Brazil

In this paper a hybrid topology of Modular Multilevel Cascade Converter (MMCC) - Double-Star Chopper-Cells (DSCC) is proposed. This configuration is applied as a unidirectional controlled single-phase rectifier, wherein one of the converter legs is composed by diodes instead of the submodules (SMs) connections. In order to ensure the energy balance among the local SM capacitors, a voltage balancing control strategy is also presented. Besides, a grid current control strategy associated to a method that eliminates zero-crossing distortion caused by the diode leg is proposed, resulting in a power-factor correction (PFC) and a sinusoidal grid current. Experimental results are presented and allow validating the control strategies.

关键词： Voltage control Topology Capacitors Radio frequency Current control Inductors Harmonic analysis

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Active Power Line Conditioner based on Modular Multilevel Cascade Converter - Double-Star Chopper-Cells

Active Power Line Conditioner based on Modular Multilevel Ca...

引用

Annual Conference of Industrial Electronics Society

作者： Italo Roger F. M. P. da Silva Alexandre C. Oliveira Cursino B. Jacobina Camila S. Gehrke Victor F. M. B. Melo Post-graduate Program in Electrical Engineering - PPgEE/COPELE Campina Grande-PB Brazil Department of Electrical Engineering (DEE) Federal University of Campina Grande (UFCG) Campina Grande-PB Brazil

ISBN: (纸本)9781479902255

In this paper an Active Power Line Conditioner (APLC) is proposed based on a Modular Multilevel Cascade Converter (MMCC) - Double Star Chopper Cells (DSCC) topology. A higher-voltage, low-switching frequency IGBT converter is used to achieve harmonic minimization. Compared to the conventional APLC topology, the proposed approach employs lower DC-link voltage, lower voltage in the power devices, flexible output voltage level, fault protection, less prone to noise, loss reduction, among others features considered in this work. Experimental results show that the proposed active power filter topology is capable of minimizing load harmonics and compensating reactive power at the Point of Commom Coupling (PCC).

关键词： Voltage control Harmonic analysis Capacitors Power system harmonics Radio frequency Topology Inductance

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Three-phase shunt active power filter based on the interconnection of single-phase and three-phase converters

Three-phase shunt active power filter based on the interconn...

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Brazilian Power Electronics Conference, COBEP

作者： A. M. Maciel C. B. Jacobina V. B. Melo E. C. dos Santos E. L. L. Fabrício Instituto Federal da Paraíba PB Brazil Electrical Engineering Department (DEE) Federal University of Camnina Grande (UFCG) Camnina Grande PB Brazil Post-Graduate Program in Electrical Engineering-PPgEE-COPELE Department of Electrical and Computer Engineering IUPUI

This paper presents a topology based on the interconnection of single-phase H-bridge converters and a three-phase converter acting as a shunt active power filter. Contributions for the model, PWM approach and control strategies are presented to the studied converter. As compared to the conventional solution by using just H-bridges converters, the proposed one reduces the number of semiconductor and storage devices while keeping the same characteristics of high number of levels. A comprehensive THD analysis will be considered followed by simulated and experimental outcomes.

关键词： Control systems Topology Capacitors Voltage control Shunts (electrical) Pulse width modulation Integrated circuit interconnections

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Power hardware-in-the-loop (PHIL) based on FPGA

Power hardware-in-the-loop (PHIL) based on FPGA

引用

Brazilian Power Electronics Conference, COBEP

作者： Camila S. Gehrke Alexandre C. Oliveira Antonio Marcus N. Lima Italo Roger F. M. P. da Silva Universidade Federal de Campina Grande Campina Grande PB BR Department of Electrical Engineering (DEE) Federal University of Campina Grande (UFCG) Campina Grande PB Brazil Post-graduate Program in Electrical Engineering - PPgEE/COPELE

Nowadays, to improve power quality and power demand, several studies point to the use of Active Power Line Conditioners (APLCs) and Distributed Generation (DG), both based on power electronic devices. Considering various distributed power devices with cooperative operation, the strategies evaluation to compensate harmonics and correct power factor (PF) in Electric Power System (EPS) is only possible to be investigated by simulation. In this work, it is proposed a Power Hardware-in-the-loop (PHIL) system for testing the APLCs operation. The proposed PHIL system can evaluate the performance of the APLC control strategies and EPS dynamic response under APLC operation. Furthermore, the same platform can be used to integrating DGs with the EPS as it also uses power electronic devices.

关键词： Field programmable gate arrays Harmonic analysis Digital signal processing Power harmonic filters Power quality

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Single-phase to three-phase induction generation system with two parallel single-phase half-bridge converters

Single-phase to three-phase induction generation system with...

引用

Brazilian Power Electronics Conference, COBEP

作者： Nady Rocha Ely C. de Menezes Ítalo A. Cavalcanti de Oliveira Cursino B. Jacobina Electrical Engineering Department (DEE) Federal University of Paraíba (UFPB) Cidade Universitária - João Pessoa PB Brazil Post-Graduate Program in Electrical Engineering - PPgEE - COPELE Federal University of Campina Grande (UFCG) Campina Grande PB Brazil

This paper presents a generation system based on the induction generator for wind energy application. The induction generator is connected to single-phase grid through an ac-dc-ac single-phase to three-phase converter. The single-phase converter is composed of two parallel single-phase half-bridge converters. Suitable modelling, including the circulation current, and control strategy are developed. The control of generator is based on the field oriented control. A pulse width-modulation (PWM) technique using a single and double carriers PWM is presented. Proposed topology permits to improve the harmonic distortion. Beside, it can reduce the power losses in the converter. Finally, simulation and experimental results are presented.

关键词： Pulse width modulation Topology Estimation Induction generators Inductance Harmonic distortion

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Shunt Active Power Filter With Open-End Winding Transformer and Series Connected Converters

Shunt Active Power Filter With Open-End Winding Transformer ...

引用

IEEE Energy Conversion Congress and Exposition

作者： G. A. de A. Carlos C. B. Jacobina E. C. dos Santos E. L. L. Fabricio N. Rocha Department of Control and Industrial Process Federal Institute of Alagoas (IFAL) Post-Graduate Program in Electrical Engineering - PPgEE - COPELE Department of Electrical Engineering Federal University of Campina Grande (UFCG) Department of Electrical and Computer Engineering Purdue School of Engineering and Technology (IUPI) Department of Electrical Engineering Federal University of Paraiba (UFPB)

ISBN: (纸本)9781479903375

This paper presents a shunt active power filter based on the concept of open-end winding (OEW) transformers. The proposed configuration is constituted of two converters with three legs each series connected throughout a three-phase OEW transformer. Model PWM strategy and control scheme are presented as well. The main advantage of the proposed system lies on the multi-level waveform generation, which allows reduction of either harmonic distortions or switching losses. This proposed topology is suitable for medium voltage (MV) distribution systems. Simulation and experimental results validate the theoretical study.

关键词： OEW multi-level MV active power filter Transformer power filters multilayers Converters winding (process) shunt Shunts (electrical) Multiple Virtual Storage Theoretical Study

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