A DC/DC multilevel converter for high voltage applications

2011 ◽  
Author(s):  
Andres Lopez ◽  
Diego Patino ◽  
Rafael Diez ◽  
Gabriel Perilla
Keyword(s):  
High Voltage ◽  
Multilevel Converter

scholarly journals Novel Enhanced Modular Multilevel Converter for High-Voltage Direct Current Transmission Systems

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2257
Author(s):  
Dimitrios Vozikis ◽  
Fahad Alsokhiry ◽  
Grain Philip Adam ◽  
Yusuf Al-Turki
Keyword(s):  
High Voltage ◽  
Low Voltage ◽  
Modular Multilevel Converter ◽  
Multilevel Converter ◽  
Medium Voltage ◽  
High Voltage Direct Current ◽  
Current Transmission ◽  
The Cost ◽  
Voltage Harmonics ◽  
Chain Links

This paper proposes an enhanced modular multilevel converter as an alternative to the conventional half-bridge modular multilevel converter that employs a reduced number of medium-voltage cells, with the aim of improving waveforms quality in its AC and DC sides. Each enhanced modular multilevel converter arm consists of high-voltage and low-voltage chain-links. The enhanced modular multilevel converter uses the high-voltage chain-links based on medium-voltage half-bridge cells to synthesize the fundamental voltage using nearest level modulation. Although the low-voltage chain-links filter out the voltage harmonics from the voltage generated by the high-voltage chain-links, which are rough and stepped approximations of the fundamental voltage, the enhanced modular multilevel converter uses the nested multilevel concept to dramatically increase the number of voltage levels per phase compared to half-bridge modular multilevel converter. The aforementioned improvements are achieved at the cost of a small increase in semiconductor losses. Detailed simulations conducted in EMPT-RV and experimental results confirm the validity of the proposed converter.

scholarly journals Energy balancing in modular multilevel converter systems

2017 ◽  
Vol 65 (5) ◽  
pp. 685-694
Author(s):  
P. Blaszczyk ◽  
K. Koska ◽  
P. Klimczak
Keyword(s):  
Control System ◽  
High Voltage ◽  
High Power ◽  
Power Converter ◽  
Modular Multilevel Converter ◽  
Energy Balancing ◽  
Multilevel Converter ◽  
Test Setup ◽  
Clear View ◽  
Hierarchical Levels

Abstract The modular multilevel converter (MMC) is a well-known solution for medium and high voltage high power converter systems. This paper deals with energy balancing of MMCs. The analysis includes multi-converter systems. In order to provide clear view, the MMC control system is divided into hierarchical levels. Details of control and balancing methods are discussed for each level separately. Finally, experimental results, based on multi-converter test setup, are presented.

Operation of PCB-embedded, high-voltage multilevel-converter GaN-IC

2017 ◽  
Author(s):  
Beatrix Weiss ◽  
Richard Reiner ◽  
Patrick Waltereit ◽  
Rudiger Quay ◽  
Oliver Ambacher
Keyword(s):  
High Voltage ◽  
Multilevel Converter
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