A Modified PUTT Scheme for Transmission Lines Connecting DFIG-Based Wind Farm
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Bibliographic record
Abstract
With the large integration of wind turbine generators (WTGs) in the power grid, the protection of the transmission lines connecting to the WTGs has become a great concern. Doubly fed induction generators (DFIGs) are among the most widely installed WTGs, but the frequency deviation of the fault current measured at the wind farm side relays due to the short circuit behavior of DFIGs with the activation of the crowbar circuit has resulted in the failure of distance relays used for protection of transmission lines connecting DFIGs. This paper proposes a modified permissive underreaching transfer trip (PUTT) scheme that provides fast and reliable protection for the transmission lines connecting DFIG-based wind farms. By adding the frequency tracking elements to the conventional PUTT scheme, the modified scheme correctly blocks the maloperation of the distance elements during external faults, enables the trip of the relay during internal faults, and significantly improves the security of the relay at the wind farm side.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 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 it