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Content Provider | IET Digital Library |
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Author | Elserougi, Ahmed A. Abdelsalam, Ibrahim Massoud, Ahmed Mohamed Ahmed, Shehab |
Abstract | Conventional modular multilevel converters (MMCs) are promising converters for high-voltage high-power applications. Unlike DC–AC conversion, DC–DC conversion of MMCs suffers from unbalanced capacitor voltages due to the energy drift problem. In this study, a new modular DC–DC converter is proposed, which consists of front-end half-bridge MMC with half-bridge submodules followed by full-bridge MMC with full-bridge submodules. The proposed modular multilevel DC–DC converter can be used effectively for connecting two different DC voltage levels in high-/medium-voltage DC grids. The proposed architecture provides successful DC–DC conversion with balanced capacitor voltages throughout the arm interchange concept. It also provides a high conversion ratio, bidirectional power flow, low losses, low current stresses, reduced number of submodules, and DC fault blocking capability. Detailed illustration, operational concept, and design of the proposed architecture with the arm interchange concept are presented. Simulation results for a high-voltage high-power DC–DC converter with the suggested approach are presented to demonstrate the system performance during different normal as well as abnormal operating conditions. Finally, a scaled-down prototype has been implemented for validation. The extracted simulation and experimental results elucidate the presented claims. |
Starting Page | 564 |
Ending Page | 576 |
Page Count | 13 |
ISSN | 17518687 |
Volume Number | 14 |
e-ISSN | 17518695 |
Issue Number | Issue 4, Feb (2020) |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-gtd/14/4 |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2019.1113 |
Journal | IET Generation, Transmission & Distribution |
Publisher Date | 2019-12-06 |
Access Restriction | Open |
Rights Holder | © The Institution of Engineering and Technology |
Subject Keyword | Arm Interchange Concept Capacitor Control of Electric Power System Conventional Modular Multilevel Converter Are Promising Converter DC Fault Blocking Capability DC-DC Power Converter DC–AC Conversion Different DC Voltage Levels High Conversion Ratio High-voltage High-power Application High-voltage High-power DC–DC Converter HVDC Power Converter Modular DC–DC Converter Modular Multilevel DC–DC Converter Power Converter Power Electronics Power Supplies to Apparatus Power Supply Successful DC–DC Conversion Supervisory Circuit |
Content Type | Text |
Resource Type | Article |
Subject | Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering |
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