Summary
The transmission systems for electric power using high voltage direct current lines (HVDC) are rapidly evolving. An increasing number of TSOs are installing and/or upgrading existing high voltage transmission lines by integrating high voltage direct current lines to increase transmission capacity and the resilience of electrical networks.
Read more Read lessEnvironmental Considerations and Technological Trends
Direct current (DC) technologies reduce network losses and enable underground or submarine cables, offering significant technical and sustainability benefits for long-distance transmission.
High-voltage line monitoring requires measuring transformers to lower voltage/current to safe levels. Traditional AC devices (inductive CTs, VTs, CVTs) are unsuitable for DC, which relies on resistive-capacitive dividers for accurate voltage measurement and transient response.
Insulation systems typically use SF₆ gas for its excellent dielectric properties, but its high Global
Warming Potential (GWP) necessitates progressive elimination. OEMs are then investigating and developing eco-friendly alternatives to replace SF₆.
Scope of the Study
This study presents the design and experimental validation of RC Divider for DC voltage measurement in HVDC systems utilizing gas insulation based on synthetic air (composed by 80% nitrogen, 20% oxygen [1]). With a Global Warming Potential of zero, synthetic air represents a sustainable alternative fully compliant with EU directives on CO₂ emission reduction and the imminent phase-out of SF₆.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | A3_11245_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | Italy |
| Study committees | |
| File size | 278 KB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
GIOVANELLI Lorenzo - TRENCH GROUP
