Transient performance of UPS system with synchronous-frame digital controller
Bibliographic record
Abstract
This paper proposes a voltage controlled voltage source type nonlinear regulator, based on the state variable approach, for the control of three-phase UPS inverters. The purposes are to improve dynamic response, incorporate the output LC filter as part of the output voltage control system and reduce the number of sensors. The design and analysis are based on the system state-space models, with state variable linearization and decoupling performed through on-line calculation. An output voltage estimator is proposed, using the instantaneous power as the basis for the algorithm, with data sampling executed only at the zero switching states, thereby eliminating the filter. In addition, a full-order load current observer is used, which makes the proposed control system load parameter insensitive, and results in fast transient response. The steady state and transient performance of the UPS system are evaluated. The dynamic response time is around 4 ms. Experimental results are obtained on a 4 kVA DSP controlled prototype UPS.
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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 | 0.001 |
| 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) | 0.002 | 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 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".