Single-Phase AC-DC-AC Multilevel Converter Based on H-Bridges and Three-Leg Converters Connected in Series

被引：19
|
作者：
Dias Queiroz, Antonio de Paula [1 ,2 ]
Jacobina, Cursino Brandao [1 ]
de Freitas, Nayara Brandao [1 ]
Noroes Maia, Ayslan Caisson [3 ]
Moura Bezerra Melo, Victor Felipe [4 ]
机构：
[1] Univ Fed Campina Grande, BR-58429900 Campina Grande, Brazil
[2] Fed Inst Paraiba, BR-58187000 Picui, Brazil
[3] Fed Inst Alagoas Palmeira dos Indios, BR-57601220 Palmeira Dos Indios, Brazil
[4] Fed Inst Pernambuco, BR-56800000 Afogados Da Ingazeira, Brazil
来源：
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS | 2018年 / 54卷 / 05期
关键词：
DC-link voltages balancing; harmonic distortion; losses; power quality; pulsewidth modulation (PWM) estrategies; single-phase ac-dc-ac converter; voltage control; RECTIFIER-INVERTER; TOPOLOGY; SYSTEMS;
D O I：
10.1109/TIA.2018.2839080
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This paper investigates an ac-dc-ac multilevel power converter. The studied configuration is composed of two single-phase ac-dc-ac three-leg modules and series-connected H-bridges in the shared part of system. Because the proposed converter has shared legs between the input and output, it is employed in applications with same input and output frequency. Uninterrupted power supply and unified power quality conditioner are application examples for this converter. Such multilevel topology has lower dc-link voltage rating, which, consequently, presents low switch blocking voltages when compared to conventional topologies. System model, a space-vector pulsewidth modulation (PWM) strategy to symmetrical and asymmetrical dc-link voltages, and an overall control strategy to adjust the system variables are presented. A power flux analysis shows the operation zone in which the individual dc-link voltage balancing is possible. PWM and control strategies are developed to reduce the semiconductor total losses, harmonic distortion, and switching stress. Two ac-dc-ac multilevel conventional structures are used for comparison. Simulation and experimental results demonstrate the feasibility of the studied converter.
引用
收藏
页码：4696 / 4706
页数：11
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