Influence of harmonics in system voltage on metal oxide surge arrester diagnostics
Bibliographic record
Abstract
As a metal oxide surge arrester (MOSA) ages, its resistive leakage current increases with accompanying increase in the third harmonic component which is therefore widely used as an indicator of ageing. Since the system voltage may contain harmonics, principally the third, researchers have developed a technique to account for the third harmonic component of capacitive current in deriving the resistive third harmonic current from the leakage current. However, the influence of voltage harmonics on the magnitude of the resistive current has not been considered which aspect is explored in this paper. It is shown that even nominal amounts of the third, fifth, seventh and eleventh system voltage harmonics have considerable influence on the third harmonic component of arrester resistive current. In fact the third harmonic resistive current of an aged MOSA under sinusoidal voltage is comparable to that obtained with an unaged MOSA subjected to harmonic contaminated voltage.
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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".