Analysis and mitigation of interaction between transformer inrush current and HVDC operation
Bibliographic record
Abstract
No-load transformer energization can introduce an unexpected inrush current which is rich in harmonics. The application of the Reactive Power Compensator (RPC) devices in High Voltage Direct Current (HVDC) station could vary the system parallel resonant frequency and associated impedance along with the HVDC operation conditions. If the dominant harmonic components in the inrush current coincide with the resonant frequency with high impedance tuned by HVDC operation, the transient inrush current is excited and can cause the severe AC voltage distortion for a substantial period. The interaction under such harmonic resonance circumstance needs to be investigated to prevent the damage on the grid connected equipment and ensure system reliable operation. The paper introduces the “voltage distortion indices” on quantification of harmonic resonance. The proposed method provides a fast evaluation on the severity of the voltage distortion due to transformer energization and the optimum solution with the minimum impact on the system operation.
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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) | 0.000 | 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".