A multi-featured single-phase utility interface with reduced DC link capacitor for distributed power sources
Bibliographic record
Abstract
This paper discusses the operating principles and implementation of a multi-featured single-phase utility interface for distributed power sources. It controls the active power injected into the utility grid to keep the DC bus voltage regulated and compensates for the reactive power demanded and the current harmonics created by a local load. The DC bus voltage control loop includes a voltage ripple estimator so that the low order harmonics (2nd, 4th, 6th...) can be cancelled from the feedback signal. This way, one can use a small non-electrolytic capacitor in the dc bus without distorting the grid current despite of an increased dc bus voltage ripple. Besides, the loop bandwidth can be increased for a faster response. A three-level hysteresis current control scheme that presents reduced average switching frequency is used to impose a sinusoidal grid current in phase with the grid voltage. Experimental results in a scaled-down prototype demonstrate the feasibility of the proposed power electronic interface.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.002 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.005 | 0.001 |
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 source (direct Gemma or distilled Codex), 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".