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| Content Provider | IET Digital Library |
|---|---|
| Author | Wang, Shuliang Liu, Tianqi Huang, Xing Chuan Yu, Yuexiao |
| Abstract | Modular multilevel converter (MMC) has a very good application prospect in the flexible high-voltage direct current (HVDC) transmission, but higher self-loss will affect the efficiency and restrict the development. Here, the MMC in voltage source converter-based HVDC as the research object, the control and modulation algorithms are designed on the basis of analysing its working principle. The capacitor voltage imbalance problem is existed in the converter because that the capacitor of each module is independent. The factors of switching actions in balancing control technology based on the sorting method of sub-module capacitor voltages are analysed in detail. Then, an optimised balancing control algorithm by setting two balancing control thresholds is proposed to reduce the average switching frequency. Finally, a two ends HVDC transmission system was built in MATLAB/SIMULINK to verify the optimisation. The simulation research results show that the optimised balancing control can ensure sub-module capacitor voltage is in balanced and does not increase the AC output voltage harmonic content, and obviously reduce the average switching frequency of switching devices, and with the increase of number of level, the more obvious optimisation effect. |
| Starting Page | 2375 |
| Ending Page | 2380 |
| Page Count | 6 |
| Volume Number | 2019 |
| e-ISSN | 20513305 |
| Issue Number | Issue 16, Mar (2019) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/joe/conferences/cn-adc-2018 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8643 |
| Journal | The Journal of Engineering |
| Publisher | The Institution of Engineering and Technology |
| Publisher Date | 2018-10-26 |
| Access Restriction | Open |
| Rights License | Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/) |
| Subject Keyword | AC Output Voltage Harmonic Content Average Switching Frequency Balancing Control Thresholds Capacitor Capacitor Voltage Balancing Control Capacitor Voltage Imbalance Problem Control of Electric Power System Control Technology Electric Current Control Ends HVDC Transmission System Good Application Prospect High-voltage Direct Current Transmission HVDC Power Converter HVDC Power Transmission MMC Modular Multilevel Converter Modulation Algorithm Optimised Balancing Control Algorithm Power Capacitor Power Converter Power Supplies to Apparatus Sub-module Capacitor Voltage Switching Converter Switching Device Voltage Control Voltage Source Converter-based HVDC |
| Content Type | Text |
| Resource Type | Article |
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