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| Content Provider | IET Digital Library |
|---|---|
| Author | Jiang, Huijie Xiao, Lan Wang, Chuyang |
| Abstract | The submodule (SM) capacitance value of a modular multilevel converter (MMC) is so large that the reliability and cost of the MMC are affected. By existing methods of second-harmonic circulating current injection with a closed-loop control strategy, the SM capacitance value can be greatly reduced. However, the design of the SM capacitance value is not given, and extra loss is brought in. This study gives the design of the SM capacitance value when the second-harmonic circulating current is injected with a closed-loop control strategy. Then, an adaptive control method based on SM capacitor voltage fluctuation feedback is proposed to reduce the extra loss caused by the second-harmonic circulating current injection. In addition, for the case without SM capacitor voltage sensors, a method based on real-time calculation of the injected second-harmonic circulating current is proposed to reduce the extra loss without SM capacitor voltage sensors. Finally, the accuracy of the design and the validity of the proposed methods are verified by simulation and experimental results. |
| Starting Page | 2821 |
| Ending Page | 2831 |
| Page Count | 11 |
| ISSN | 17554535 |
| Volume Number | 12 |
| e-ISSN | 17554543 |
| Issue Number | Issue 11, Sep (2019) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-pel/12/11 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2018.6051 |
| Journal | IET Power Electronics |
| Publisher Date | 2019-06-17 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Adaptive Control Adaptive Control Method Capacitance-reduction Control Strategy Capacitor Closed Loop System Closed-loop Control Strategy Control of Electric Power System Extra Loss Feedback MMC Other Power Apparatus And Electric Machine Power Capacitor Power Converter Power Supplies to Apparatus Second-harmonic Circulating Current Injection Self Adjusting Control System SM Capacitance Value SM Capacitor Voltage Fluctuation Feedback SM Capacitor Voltage Sonsor Submodule Capacitance Value Voltage Control |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
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