Three-phase voltage-source UPS inverter with voltage-controlled current-regulated feedback control scheme
Bibliographic record
Abstract
This paper presents a novel control strategy for three-phase voltage-source UPS inverters with second order L-C filters. The control scheme is based on sensing the current in the filter capacitor and using it in an inner feedback loop. An outer capacitor voltage loop is also incorporated to ensure sinusoidal load voltage. A general model of the power circuit (inverter, filter, and load) is first established. Computer simulation results of the proposed three-phase voltage-source UPS system with an R-L load from "cold" start to full-load is then presented to demonstrate the suitability of the proposed control scheme for UPS applications. The dynamic response of the proposed scheme is investigated using rotating frame of reference and small signal approximation. A control loop regulator is then selected to enhance the dynamic response of the control scheme and achieve the desired performance of the UPS system. It is shown in the paper that the control scheme offers many advantages for UPS applications. It is simple to implement and capable of producing nearly perfect sinusoidal load voltage waveform at moderate switching frequency and reasonable size of filter parameters. The scheme has fast dynamic response and provides high voltage utilization of the DC source. In addition, it provides peak current limiting capability and lends itself to both linear and nonlinear load applications.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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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) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.004 | 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; both teacher heads agree on what is shown here.
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".