Summary
This paper presents maintenance guidelines for power transformers and shunt reactors used in offshore substations, both fixed-bottom and floating, operating in AC and HVDC systems.
Read more Read lessOffshore installations expose electrical equipment to severe electrical, mechanical, thermal, and environmental stresses. A well-structured maintenance concept is essential to ensure long-term reliability, safety, and cost efficiency.
The paper distinguishes between three maintenance categories: Routine, Planned, and
Unplanned Maintenance. Each category defines clear responsibilities, inspection scopes, and intervals. The guidelines are based on field experience of 20 years and complement industry standards such as IEEE C57.93, IEEE C57.152, and CIGRE TB 445, by additional recommendations specific to offshore operation.
Special emphasis is given to corrosion protection, surface cleaning, offshore accessibility, and remote monitoring. Floating substations introduce additional challenges, including vibration, inclination, and motion, which require adaptation of conventional maintenance methods.
The paper concludes with recommendations for stakeholders on defining maintenance responsibilities, selecting suitable materials, and ensuring personnel qualification and safety under offshore conditions.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | A2_11955_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | Germany |
| Study committees | |
| File size | 845 KB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
STIRL Tobias - GE Vernova, Germany; KOCH Daniel - GE Vernova, Germany; WISCHTUKAT Philip - Göbel; BOROOMAND Tirdad - GE Vernova, UK
Keywords
Power transformer, shunt reactor, tap-changer, offshore substation (OSS), floating offshore substation (FOSS), maintenance guidelines, corrosion protection, condition monitoring
