Hybrid multi-carrier PWM technique with computationally efficient voltage balancing algorithm for modular multilevel converter
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Bibliographic record
Abstract
Phase-shifted pulse width modulation (PS-PWM) technique is preferred for modular multilevel converters (MMCs) as it has even power distribution and also ensures uniform switch utilization among the submodules (SMs). In contrast, phase disposition PWM (PD-PWM) technique has superior output voltage profile, but suffers from unequal switch utilization. A new PWM technique is proposed in this paper, having the best features of the PS-PWM and PD-PWM. The SM capacitor voltage balancing algorithm has to be incorporated with the modulation scheme to maintain SM voltages at defined voltage level. This paper also presents a modified SM capacitor voltage balancing approach which can be easily implemented with any type of carrier-based PWM technique. The proposed balancing algorithm, as well as PWM technique can be extended to any level of MMC and also applicable to any SM type. The effectiveness of proposed PWM technique is validated for five-level MMC with flying capacitor SMs (FCSM) under different operating conditions against PS-PWM and PD-PWM by simulation results in PLECS platform.
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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 it