Real-Time Sag Monitoring System for High-Voltage Overhead Transmission Lines Based on Power-Line Carrier Signal Behavior
Why this work is in the frame
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Bibliographic record
Abstract
A new method of measuring the change in the average height above ground of horizontal high-voltage overhead transmission-lines (OHTLs) phase conductors is introduced. The new technique, called power-line carrier sag (PLC-SAG) for short, determines average overhead conductor height variations in real time by correlating sag with measured variations in the amplitude of signals propagating between power-line carrier (PLC) stations. The multifrequency PLC-SAG monitoring signals are injected onto the operational PLC system in the 50- to 500-kHz band, but without interfering with the operational integrity of the PLC teleprotection system. The feasibility of the method was examined using the theory of natural modes for multiconductor systems, and tested by extensive field experiments on two horizontal 400-kV lines operated in South Africa by Eskom. It is concluded that the average height of a horizontal OHTL can be tracked accurately for continuous periods by the PLC-SAG technique.
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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 | 0.000 | 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 | 0.001 | 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 it