A Single-Phase MMC-based Solid-State Transformer Suitable for EV Charging
Why this work is in the frame
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Bibliographic record
Abstract
This paper introduces a single-phase ac-dc solid-state transformer, based on the modular multilevel converter topology, termed the 2-String 2-Inductor MMC. Designed to link a medium-voltage ac network to a low-voltage dc load, it facilitates power transfer at a sub-megawatt scale, well suited for electric vehicle charging applications. Compared to other single-transformer MMC-based ac-dc SSTs, this topology significantly reduces size and volume by employing a higher frequency transformer. A modulation scheme, termed the Harmonic Shaping Nearest-Level Modulation, is developed to generate a modulated voltage with a sinusoidally varying time-averaged value while maintaining a constant switching frequency harmonic component over each sampling period. Simulation results of a 6-module, 4-kW converter in PLECS validate the proposed topology, control, and modulation design.
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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