CROWBAR RESISTANCE SETTING AND ITS INFLUENCE ON DFIG LOW VOLTAGE RIDE THROUGH
Bibliographic record
Abstract
Doubly-fed induction generator (DFIG) often adopts a crowbar protective circuit to realize low-voltage ride through (LVRT) under low-voltage fault of the grid. Crowbar resistance will affect the LVRT effect of the unit significantly. Time domain expression of transient current of the wind turbine generator system under the voltage drop fault and the calculation formula of fault current at the rotor side were deduced through space vector analysis and Laplace transformation based on the transient mathematical model of the DFIG system under voltage drop. A crowbar resistance adjustment method conforming to engineering practices was proposed, which overcame the overcurrent at the rotor side and overvoltage of the DC bus after the crowbar protective circuit is applied. The case study and the simulation test demonstrated that the proposed method inhibits the transient fault current component effectively and can increase the automation level of the DFIG system.
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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 | 0.001 |
| 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".