Hydro-Quebec experience with PSS tuning
Bibliographic record
Abstract
Hydro-Quebec has added several facilities on its transmission system, including a sixth 735 kV 950 km AC line from the James Bay region, a HVDC link of 1050 km at 450 kV with 3 rectifier-inverter substations between Radisson-Nicolet-Sandy-Ponds, 11200 MVArs of series-compensation and 4680 MW of new generation. These additions modified the overall system behavior significantly. Therefore, a task force was initiated to assess the adequacy and revise on a large scale basis the AVR and PSS settings. This paper first presents the tuning and coordination approach used by the task force. Then the benefits achieved are illustrated with the new settings installed on all 26 stabilizers present in the system. From this number, 21 will be modified during scheduled maintenance over the next few years. TransEnergie expects a significant damping improvement of the major oscillatory modes, with a corresponding /spl sime/400 MW increase of its transmission capability on several 735 kV corridors.
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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 | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.014 | 0.001 |
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".