Fault-Tolerant Control of Full-Bridge Mmc Operating in Boost Mode for Mvdc Applications
Bibliographic record
Abstract
To enable safer and more resilient operation, a full-bridge based modular multilevel converter (FB-MMC) has been proposed for medium voltage direct current (MVDC) applications, owing to its inherent dc-side fault blocking capability. In addition, FB-MMC enables boost mode operation, which allows flexible control in the overmodulation region and facilitates step-down of the de-side voltage. However, the increased number of switching devices in the FB-MMC reduces the reliability of the converter. While previous studies have focused on the external fault management of FB-MMCs, limited attention has been given to internal fault tolerant operation, revealing a critical gap in the existing literature. This paper proposes a fault-tolerant operation for FB-MMC which prevents submodule capacitor voltage rise during an internal fault. Furthermore, the proposed fault tolerant method can maintain the post-fault performance of the FB-MMC same as pre-fault conditions without increasing the overall cost of the MMC by considering any redundant submodules. The present article also explains the relationship between the multiple submodule fault tolerant capability and the overmodulation region of the FB-MMC. The performance of the technique is validated through simulations and experimental tests with the 9-level FB-MMC prototype.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".