A Single-Phase 35-levels Cascaded PUC Multilevel Inverter Fed by a Single DC-Source

被引：6
作者：
Junior, Samuel C. S. [1 ]
Jacobina, Cursino [1 ]
Fabricio, Edgard L. L. [2 ]
机构：
[1] Fed Univ Campina Grande UFCG, BR-58429900 Campina Grande, Paraiba, Brazil
[2] Fed Inst Paraiba IFPB, BR-58015435 Joao Pessoa, Paraiba, Brazil
来源：
2021 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE) | 2021年
关键词：
Multilevel Inverter; Packed U-Cell; Sensor-Less Voltage Regulator; PUC5; MPUC7; TOPOLOGY;
D O I：
10.1109/ECCE47101.2021.9595834
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
This work proposes a new multilevel inverter topology composed of a PUC5 and an MPUC7 convert cascaded connected fed by only one dc power source by using a high-frequency link. This topology can provide 35-level voltage by using four asymmetrical dc-links, and only twelve power switches. The second dc-link operates as a floating capacitor, while the two smaller dc-links are supplied by the dc-source through a high-frequency transformer (HFT) rated at 7.6% of the total load power when operating at nominal voltage. A self-balance sensor-less strategy is integrated into the switching control and is used to control the voltage of the floating capacitor while the HFT balances two dc-links providing the required power flow. A Nearest Level Control (NLC) and an analysis of power distribution among each dc-link are presented in detail. Besides, comparisons with other multilevel topologies using HFT are carried out. Experimental results are presented to validate the proposed inverter and its floating capacitor control.
引用
收藏
页码：2467 / 2474
页数：8
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