Transformerless Grid-Connected Converters Using Active Virtual Ground Technique for Single-Phase Microgrids
Bibliographic record
Abstract
The paper presents the state-of-the-art technique Active Virtual Ground (AVG) in the design of single-phase grid-connected converters. The whole series of single-phase converters are based on the latest AVG technique. All of the designed topologies are with high efficiency, low leakage current, and single-stage structure. Focusing on the applications in ac microgrids, all of the evaluated topologies are classified into three different groups. They are associated with the three key components in the microgrid networks, which are power consumers, renewable energy sources and energy storage systems. The topology advantages and the design limitations of each converter type are analyzed in detail. The working principle of the AVG technique is demonstrated through the circuit equivalent model and is successfully verified in a set of 600 to 800 W prototypes. All of the experimental results are in good agreement with theoretical knowledge.
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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".