Thermal Loading and Analysis of Modular Multilevel Converters using Injection Control of Circulating Current and Common-mode Voltage
Bibliographic record
Abstract
The circulating current (CC) is an undesirable phenomenon in a modular multilevel converter (MMC), as it increases the capacitor voltage ripple, power losses and current stress on power semiconductor devices. Prior research has mainly focused on various control methods as well as modulation schemes to minimize the CC. This paper presents a comprehensive analysis of an MMC under common-mode voltage (CMV) injection and CC control strategies in terms of thermal loading and failure rate of power semiconductor devices. To benchmark these control strategies, a generalized control structure for the MMC is presented. To study the thermal loading on power semiconductor devices, an electro-thermal model is developed. The effectiveness of the presented control approach is demonstrated through detailed simulations and experimental studies using hardware-in-the-loop (HIL) system. Finally, the loading on power semiconductor devices of the MMC is evaluated under injection control of CC and CMV for different modulation schemes.
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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".