Abstract
Tolerance and component aging can cause significant differences in the capacitance values of the submodules (SMs) in a modular multilevel converter (MMC). Depending on the modulation technique, capacitance mismatches may produce uneven switching transitions of the SMs, hence imbalances in the power losses that can lead to reliability problems. In this paper, a new algorithm that helps to achieve evenly distributed switching and conduction losses within the converter SMs is presented. The proposed algorithm is based on a modification of the common voltage balancing algorithms, balancing a weighted function of voltage and losses. Even distribution of power losses is achieved at the cost of slightly increasing the capacitor voltage ripples. The effectiveness of the strategy has been demonstrated by simulation results of a high-power grid-connected MMC.
| Original language | English |
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| Title of host publication | Proceedings of the IECON 2016 - 42nd Annual Conference of the Industrial Electronics Society |
| Publisher | IEEE Computer Society |
| Pages | 5064-5069 |
| Number of pages | 6 |
| ISBN (Electronic) | 9781509034741 |
| DOIs | |
| Publication status | Published - Dec 21 2016 |
| Externally published | Yes |
| Event | 42nd Conference of the Industrial Electronics Society, IECON 2016 - Florence, Italy Duration: Oct 24 2016 → Oct 27 2016 |
Publication series
| Name | IECON Proceedings (Industrial Electronics Conference) |
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Conference
| Conference | 42nd Conference of the Industrial Electronics Society, IECON 2016 |
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| Country/Territory | Italy |
| City | Florence |
| Period | 10/24/16 → 10/27/16 |
Bibliographical note
Publisher Copyright:© 2016 IEEE.
ASJC Scopus Subject Areas
- Control and Systems Engineering
- Electrical and Electronic Engineering
Keywords
- Capacitor voltage ripples
- Modular multilevel converter
- Power losses
- Reliability improvement