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Multilevel Single-Phase Four-Leg AC-DC-AC Converter 12

Multilevel Single-Phase Four-Leg AC-DC-AC Converter

引用

12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020

作者： Rodrigues, Phelipe L. S. Jacobina, Cursino B. Lima, Antonio M. N. Post-Graduate Program in Electrical Engineering - PPgEE - Copele Paraíba58429-900 Brazil Department of Electrical Engineering Campina Grande Paraíba58429-900 Brazil

ISBN: (纸本)9781728158266

This paper presents a single-phase four-leg ac-dc-ac converter, with one leg shared by the grid side and the load side. The proposed topology can generate input and output voltages with seven levels, presenting reduced harmonic distortion, in addition to using reduced voltage switches. The space-vector pulsewidth modulation strategy (SV-PWM), the control technique, the system model, and a comparison with a three-leg topology will be presented. As for performance comparison parameters, harmonic distortion in currents and voltages, the average switching frequency, and semiconductor losses will be used. The topology was simulated and assembled in the laboratory to obtain experimental results. © 2020 IEEE.

关键词： Topology

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Universal Active Power Filter Based on AC-DC-AC Converter with Six Controlled Switches for Single-Phase Systems 12

Universal Active Power Filter Based on AC-DC-AC Converter wi...

引用

12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020

作者： Rodrigues, Phelipe L. S. Jacobina, Cursino B. Lima, Antonio M. N. Post-Graduate Program in Electrical Engineering - PPgEE - Copele Campina Grande Paraíba58429-900 Brazil Department of Electrical Engineering Campina Grande Paraíba58429-900 Brazil

ISBN: (数字)9781728158266

ISBN: (纸本)9781728158266

This paper presents an ac-dc-ac converter with six controlled switches for single-phase systems applied as a universal active power filter (UAPF). The proposed topology is feasible for compensating voltages swells and harmonics generated by nonlinear loads. The difference between the conventional and proposed topology is the replacement of a controlled leg (composed of IGBTs) for an uncontrolled leg (composed only of diodes). For performance comparisons, current THD, switching and conduction losses of the semiconductors, average switching frequency, and power in the transformer were used as parameters. Control and pulsewidth modulation techniques based on space vector approaches were developed to eliminate zero-crossing distortions caused by the use of the uncontrolled leg. Simulation and experimental results were presented for validation of the mathematical model. © 2020 IEEE.

关键词： Topology

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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

IEEE Energy Conversion Congress and Exposition, ECCE

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

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.

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Single-Phase Current Source Rectifier With Power Decoupling Using The X - Type CSC Topology

Single-Phase Current Source Rectifier With Power Decoupling ...

引用

Brazilian Power Electronics Conference, COBEP

作者： Montiê Alves Vitorino Lucas Vinícius de Araújo Gomes Graduate Program in Electrical Engineering (PPgEE-COPELE) Industrial Electronics and Machine Drive Laboratory (LEIAM) Federal University of Campina Grande (UFCG)

ISBN: (纸本)9781665421300

This work proposes a topology of X-Type Current Source Rectifier (X-type CSR) that helps to mitigate the effect of the double-the-line-frequency power ripple (low frequency) in the output of a single-phase rectifier. The low frequency ripple reduction allows to increase the converter power density by reducing the volume of the DC-bus inductor, without lack of stiffness at the DC-bus. The low frequency reduction is achieved by using a different single-phase CSR topology that uses the well known X-type CSC approach which allows reduction in conducting losses and independent control for two CSCs which share the same DC-bus and the middle switches of the leg. Details of topology, control strategy and modulation are presented. Simulation and experimental results for a 500W prototype are provided to validate the theoretical approach.

关键词： Legged locomotion Power system measurements Simulation Rectifiers Prototypes Power electronics Topology

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Unidirectional Five-Level Rectifiers for WECS Applications

Unidirectional Five-Level Rectifiers for WECS Applications

引用

IEEE Energy Conversion Congress and Exposition, ECCE

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

This paper proposes two three-phase five-level power conversion systems. They can be employed in a wind energy converter system (WECS) application as the machine side rectifier, connected to the permanent magnet synchronous machine (PMSM) by an open-end winding (OEW) arrangement. Compared to the conventional topology, proposed ones lack the use of six clamping diodes in their structures. Even though, they also achieve the same power quality as the conventional one. Besides, proposed configurations may have fewer semiconductor devices in the current path, providing slightly lower power losses. Furthermore, the control system used ensures the synchronization between voltage and current, providing a high power factor operation. The converter equations, pulse-width modulation technique, and control strategy are detailed. Simulation and experimental results are provided in order to confirm their performance and feasibility.

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Three-Phase Integrated PFC AC-AC Half-Bridge Boost Rectifier and Class D Resonant Inverter with Weak Coupled Coils for IH Application

Three-Phase Integrated PFC AC-AC Half-Bridge Boost Rectifier...

引用

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

作者： Ruan C. M. Gomes Montiê A. Vitorino Maurício B. R. Corrêa Post-Graduate Program in Electrical Engineering (PPgEE–COPELE) Federal University of Campina Grande (UFCG) Campina Grande PB Brazil

ISBN: (数字)9781728148298

ISBN: (纸本)9781728148304

This paper presents a three-phase integrated PFC AC-AC resonant inverter with boost effect for Induction Heating (IH) Application. This converter is composed by three independent half-bridge boost rectifier and class D resonant inverters with non-smoothed DC link that achieve high power factor operation. The magnetic coupling of the three coils was measured for characterizing the resonant behavior of the arrangement. Experimental results validate the modes of operation with ZVS and the converter performance in the entire power input range (PF and THD).

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Zero-Current Switching Clamped Current Converter

Zero-Current Switching Clamped Current Converter

引用

Brazilian Power Electronics Conference, COBEP

作者： Vinicius Freire Bezerra Montiê Alves Vitorino Jens Friebe Graduate Program in Electrical Engineering (PPgEE-COPELE) Industrial Electronics and Machine Drive Laboratory (LEIAM) Federal University of Campina Grande (UFCG) Institute for Drive Systems and Power Electronics (IAL) Leibniz Universität Hannover (LUH)

ISBN: (纸本)9781665421300

In this work it is presented a novel Zero-Current Switching Clamped Current (ZCS-CC) Converter that allows soft-switching for a full-bridge DC/DC Current Source Converter (CSC). The soft-switching is achieved using the inherent stray inductance of the switches and diodes, which forms a resonant tank with the output capacitive filter. This period of resonance occurs in the dead time between the two complementary switches of the full-bridge and is enough for both to be comutated with zero current. It is presented the theoretical foundation that justify its operation as well as the simulation and experimental results.

关键词： Inductance Capacitance Power electronics Zero current switching

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Multilevel Single-Phase Four-Leg AC-DC-AC Converter

Multilevel Single-Phase Four-Leg AC-DC-AC Converter

引用

IEEE Energy Conversion Congress and Exposition

作者： Phelipe L. S. Rodrigues Cursino B. Jacobina Antonio M. N. Lima Post-Graduate Program in Electrical Engineering - PPgEE – COPELE Federal University of Campina Grande (UFCG) Paraíba Brazil Federal University of Campina Grande (UFCG) Paraíba Brazil

ISBN: (数字)9781728158266

ISBN: (纸本)9781728158273

关键词： Topology Legged locomotion Switching frequency Mathematical model Switches Pulse width modulation Load modeling

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Dual Vienna Rectifiers with a Single Dc-link for Wind Energy Conversion System Applications

Dual Vienna Rectifiers with a Single Dc-link for Wind Energy...

引用

IEEE Energy Conversion Congress and Exposition

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

ISBN: (数字)9781728158266

ISBN: (纸本)9781728158273

In this paper, dual Vienna rectifiers are proposed for Wind Energy Conversion System (WECS) applications with Open-End Winding (OEW) Permanent Magnet Synchronous Generator (PMSG). Due to the reduced number of controlled switches, the proposed topologies have reduced costs and high reliability. Besides, they provide a better power quality using the same number of controlled switches than conventional structures presented in the literature, making them very attractive options for industry applications. The system model, space vector modulation, and control strategy are given. Simulation results are provided in order to validate their performance and feasibility.

关键词： Topology Voltage control Switches Power quality Power electronics

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A Single-Phase Five-Level Grid-Connected Inverter for Photovoltaic Applications

A Single-Phase Five-Level Grid-Connected Inverter for Photov...

引用

IEEE Energy Conversion Congress and Exposition, ECCE

作者： Jadyson J. Silva A. C. Bahia Filipe P. N. Tahim Andre Darlan A. Fernandes Fabiano F. Costa Post-graduate Program in Electrical Engineering PPGEE- UFBA Salvador Bahia Brazil Federal University of Bahia- UFBA Salvador Bahia Brazil Federal University Federal University of Paraíba - UFPB João Pessoa Paraíba Brazi

With the increasing energy demands and environmental impacts from conventional energy sources, especially fossil fuels, renewable energy sources are increasingly popular. Among which, photovoltaic (PV) energy generation systems stands out due to their ease of installation, maintenance and low acquisition cost. Single-phase PV systems connected to the grid are commonly used in small and medium-sized residential and commercial installations. This paper proposes a single-phase five-level inverter for grid-connected PV systems. A PWM technique is applied to balance the voltages across the dc-link capacitors. Moreover, the technique has a suitable performance in terms of conducting and switching losses. The results shows the effectiveness of the technique for injecting suitable low distorted currents into the grid. Moreover, the system operates correctly to balance the voltages across the dc-link capacitors and under abrupt changes of the available power from the PV panels.

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