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检索条件"机构=Post-Graduate Program in Electrical Engineering - PpgEE - COPELE"

共 131 条记录，以下是51-60 订阅

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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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PARALLEL AC-DC SINGLE-PHASE ASYMMETRICAL BOOST RECTIFIERS

PARALLEL AC-DC SINGLE-PHASE ASYMMETRICAL BOOST RECTIFIERS

引用

Annual Conference of the IEEE Industrial Electronics Society

作者： Nustenil S. M. L. Marinus Cursino B. Jacobina Nady Rocha Rodolpho M. B. Cavalcanti Post-Graduate Program in Electrical Engineering - PPgEE - COPELE Electrical Engineering Department (DEE) Federal University of Campina Grande (UFCG) Electrical Engineering Department (DEE) Federal University of Paraiba (UFPB)

ISBN: (纸本)9781479940318

In this paper, three unidirectional single-phase rectifiers are proposed. Each converter is composed of two non-controlled legs and two controlled legs. Modelling and control strategy of the system, including a synchronization method, are proposed. In the synchronization method, the grid current is synchronized with the generated voltage ensuring a sinusoidal grid current without zero-crossover distortions. Analysis of harmonic distortion and semiconductor losses are presented. Simulation and experimental results are shown for validation purposes.

关键词： Topology Synchronization Voltage control Legged locomotion Harmonic distortion Inductors Semiconductor diodes

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Fault tolerance performance of two hybrid six-phase drive systems under single-phase open-circuit fault operation 32

Fault tolerance performance of two hybrid six-phase drive sy...

引用

32nd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2017

作者： Melo, Victor F. M. B. Jacobina, Cursino B. Rocha, Nady Filho, Edgar R. B. Post-Graduate Program in Electrical Engineering PPgEE - COPELE - UFCG Campina Grande Paraíba Brazil Federal Institute of Pernambuco IFPE Afogados da Ingazeira Brazil Electrical Engineering Department Federal University of Campina Grande - UFCG Campina Grande Paraíba Brazil Federal University of Paraíba - UFPB - João Pessoa Paraíba Brazil

ISBN: (纸本)9781509053667

This paper discusses the fault tolerance performance of two hybrid six-phase drive systems under single-phase open-circuit fault. The topologies are considered to be hybrid because each of the two three-phase groups of the six-phase machine is connected to a different type of converter. One group is connected to a two-level converter and the other group is connected to a dual converter in an open-end arrangement. A compensation strategy is discussed in order to keep the rated operation even after the occurrence of the fault. The six-phase machine mathematical model after the fault is presented and utilized to elaborate the compensation strategy. Simulation and experimental results show the validity of the discussed solutions. © 2017 IEEE.

关键词： Timing circuits

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Shunt active power filter based on cascaded transformers coupled with three-phase bridge converters

Shunt active power filter based on cascaded transformers cou...

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Annual IEEE Conference on Applied Power Electronics Conference and Exposition (APEC)

作者： Gregory A. de Almeida Carlos Cursino B. Jacobina João Paulo R. A. Méllo Euzeli C. dos Santos Post-Graduate Program in Electrical Engineering - PPgEE - Copele Campina Grande PB Brazil Department of Electrical and Computer Engineering Indiana University - Purdue University (IUPUI) Indianapolis IN USA

ISBN: (纸本)9781467395519

This paper proposes a multilevel shunt active power filter (SAPF) to deal with either harmonic currents compensation or reactive power compensation. Such a device can reduce the harmonic distortion at the grid currents provided by non-linear loads located in stiff systems. The proposed SAPF is based on three-phase bridge (TPB) converters connected to cascaded single-phase transformers. The transformers arrangement permits the compensator to use a single dc-link unit which simplifies the control strategy and number of sensors. The multilevel waveforms are generated by using a suitable PWM strategy associated with the transformers turns ratio. Modularity and simple maintenance make the proposed SAPF an attractive solution compared to some conventional configurations. The model, PWM technique and control strategy, are presented as well as studies considering harmonic distortion and semiconductor losses estimation. Simulation and experimental results are presented in order to validate theoretical approaches.

关键词： Pulse width modulation Estimation Capacitors Harmonic analysis Switches Power system harmonics Reactive power

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AC-DC Power Conversion Systems for Open-End Winding PMSM Based on Vienna Rectifiers

AC-DC Power Conversion Systems for Open-End Winding PMSM Bas...

引用

IEEE Energy Conversion Congress and Exposition

作者： Amanda P. Monteiro Cursino B. Jacobina Filipe A. C. Bahia Reuben P. R. Sousa Post-Graduate Program in Electrical Engineering PPgEE/COPELE Paraíba Brazil Department of Electrical Engineering (DEE) Federal University of Campina Grande (UFCG) Paraíba Brazil

This paper proposes three unidirectional ac-dc conversion power systems for wind energy conversion system (WECS) applications. These topologies are based on Vienna rectifiers and have reduced number of controlled switches, which allows reduce size, costs and is still possible to obtain low current harmonic distortion. They are composed of a series connection of two three-phase converters associated to a permanent magnet synchronous machine (PMSM) by an open-end winding (OEW) configuration. Compared with the three-phase rectifier with reduced number of controlled switches, proposed topologies offer a higher levels-per-switch ratio, allowing to achieve a sinusoidal converter current with same or lower harmonic content. Besides this, they can offer lower switch blocking voltage. These characteristics make them very interesting options to the manufacturers due to reduced costs and better power quality offered. The system model, PWM technique and control strategy are discussed. Simulation and experimental results are provided in order to validate their performance and feasibility.

关键词： Wind energy conversion system Vienna rectifiers unidirectional rectifiers

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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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Single-Phase Transformerless UPS with Interleaved Boost Converters for Battery Discharging

Single-Phase Transformerless UPS with Interleaved Boost Conv...

引用

2023 IEEE Energy Conversion Congress and Exposition, ECCE 2023

作者： Pinto, Alan R. A. Bahia, Filipe A. C. Souza, Reuben P. R. Pinheiro, José R. Costa, Fabiano F. Federal University of Bahia Post-Graduate Program in Electrical Engineering - Ppgee Salvador Brazil Federal University of Bahia Dept. of Electrical and Computer Engineering - Deec Salvador Brazil Federal University of Campina Grande Dept. of Electrical Engineering - Dee Campina Grande Brazil

ISBN: (纸本)9798350316445

This paper proposes a reconfiguration for a single-phase, double conversion uninterruptible power supply (UPS). With the addition of two static switches to the original circuit, the UPS mitigates the ripple in the current, through battery discharge performed by two legs. Other than these switches, the circuit topology is preserved. The preliminary results show a satisfactory level of ripples for the inductor current and suitable power quality for the output voltage. © 2023 IEEE.

关键词： battery mode discharger interleaved boost normal mode

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Characterization of contacts degradation in circuit breakers through the dynamic contact resistance

Characterization of contacts degradation in circuit breakers...

引用

2014 IEEE PES Transmission and Distribution Conference and Exposition - Latin America, PES T and D-LA 2014

作者： De Souza, R.T. Da Costa, E.G. De Oliveira, A.C. De Sousa, W.V. De Morais, T.C.M. Post-Graduate Program in Electrical Engineering COPELE Campina Grande Federal University Brazil Industry Academic Unit Paraíba Federal Institute Brazil Department of Electrical Engineering Campina Grande Federal University Brazil Energisa Paraíba Brazil

ISBN: (纸本)9781479962501

Static resistance measurement of circuit breakers has been a crucial technique to assess the state of contacts, supporting maintenance procedures. However, in many cases, the obtained results do not provide accurate data for correct diagnosis, since the test examines only the main contact. This article discusses the application of the contact dynamic resistance measurement (DRM) in the evaluation of main and arcing contacts. The DRM is a contact resistance test, and the resistance is determined during the opening of contacts, analyzing the main and arcing contacts. The research objective is to get the DRM parameters that can assist in the contacts diagnosis. The obtained results indicate that DRM has presented more qualitative parameters than the static resistance test in the evaluation of contacts. The resistance tests were performed applying a direct current with 300 A of amplitude. © 2014 IEEE.

关键词： Electric circuit breakers

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Modal analysis of a metallic via hole by the WCIP

Modal analysis of a metallic via hole by the WCIP

引用

SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, IMOC 2015

作者： De F. Serres, Georgina K. Serres, Alexandre J. R. Freire, Raimundo C. S. Baudrand, Henri Post-Graduate Program in Electrical Engineering - COPELE Federal University of Campina Grande UFCG Campina Grande Brazil L.A.P.L.A.C.E-G.R.E ENSEEIHT Toulouse France

ISBN: (纸本)9781467394925

This paper presents a new electromagnetic modeling of a via-hole using a Wave Concept Iterative Procedure. There are specific TM modes associated with the insertion of the via-hole influencing the incident and reflected waves, called the "via's modes". The formulation and results are presented considering the influence of one and two via's mode. The advantage of the model presented is the possibility to simulate planar circuits with a layer and a via-hole considering the effects of the field that propagates around the via. © 2015 IEEE.

关键词： Modal 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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