Analysis of Pole-to-Pole Faults in Half-Bridge and Full-Bridge MMCs
Bibliographic record
Abstract
Pole-to-Pole (PTP) faults are considered as the most severe type of faults that may occur on the DC side of Modular Multilevel Converters (MMCs) in High Voltage Direct Current (HVDC) transmission systems. It is indispensable to study this type of fault to understand its characteristics that enable design of respective protection systems. This paper analyzes PTP faults in MMCs with common Half-Bridge (HB) and Full-Bridge (FB) submodule structures. Dividing the duration of the fault into two stages, the paper presents equivalent circuits for both the DC and AC sides of the converter for each stage. A simulation case study with a 101-level MMC is carried out in the PSCAD/EMTDC simulator for both HBSM and FBSM MMCs. The results confirm the validity of the presented equivalent circuits.
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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 | 0.001 |
| 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".