An accurate current transformer model based on preisach theory for the analysis of electromagnetic transients
Bibliographic record
Abstract
Summary form only given. This paper presents a new and accurate current transformer (CT) model for the analysis of electromagnetic transients, based on representation of core magnetization characteristics using the Preisach Theory. Unlike the existing CT models, the proposed model determines shapes of hysteresis minor loops independent of the hysteresis major loop. This results in a higher precision and more flexibility to fit the model hysteresis loops with the actual core material hysteresis loops of the CT. The proposed model has been implemented in the PSCAD/EMTDC software environment. As an application of the model, transient behavior of a CT due to a fault and its subsequent reclosure attempts is investigated and compared with the EMTP Reactor Type-96 based CT model and the IEEE Power System Relaying Committee CT model. Time domain simulation studies show that the transient behavior of the CT is significantly different, if different hysteresis minor loop trajectories but the same hysteresis major loop are adopted. This paper concludes that both hysteresis major and minor loops must be represented to accurately simulate performance of a CT for the reported case studies.
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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) | 0.001 | 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".