Summary
This work presents a study on the impact that temperature variations have on propagation speeds in MVAC cables using time-domain reflectometry. A multi-scale approach is adopted, beginning with a proof-of-principle experiment on a micro-network containing a short coaxial cable, followed by controlled laboratory measurements on a mini-network consisting of a 207 metre PILC cable drum, and concluding with an active in-service circuit of comparable length and identical cable type. Temperature-induced changes in propagation speed have been reliably detected and confirm the well-defined linear relationship between changes in propagation speed and temperature for PILC cables. Applying this calibration to field measurements and adjusting for baseline offsets, yields relative temperatures that closely track measured soil temperature over a four-month period, with a temperature change resolution of approximately 1°C. The results demonstrate that the approach provides a practical, non-intrusive method for real-time thermal monitoring in active operational networks.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | B1_10282_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | Netherlands, The |
| Study committees | |
| File size | 1,006 KB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
JIMÉNEZ-ROSALES Alejandra - Alliander N.V; WOLDENDORP Daniël - Alliander N.V; KOLMUS Alex - Alliander N.V; DE VISSER Niels - Alliander N.V; DE LANGE Jordi - Alliander N.V
Keywords
Experiments, MVAC cable systems, thermal monitoring, time-domain reflectometry
