Planning levels and harmonic measurements on Hydro-Quebec's transmission system
Bibliographic record
Abstract
A power quality survey has been conducted at 28 stations on Hydro-Quebec's 69 to 315 kV transmission system, between 1993 and 1996. This paper provides results for the harmonic voltage components and compares the results with the indicative planning levels proposed in IEC 1000-3-6. It is shown that planning levels may be exceeded for some harmonic voltage components at a few locations. The harmonics that are of most concern are the fifth, the eleventh, and higher order harmonics like the twenty-third, twenty-fifth, thirty-fifth and thirty-seventh. In most cases, these excess levels are caused by the harmonics produced by large disturbing loads with possible amplification due to resonance. On the other hand, planning levels proposed in IEC 1000-3-6 are very low for some high order harmonics (0.2% for multiples of 3 and even order harmonics) and it is difficult to see any reason for limiting these harmonic voltages to such low values. Finally, results indicate that there is no correlation between the level of distortion and the short-circuit impedance of the network at different sites.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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".