Summary
This paper presents a Reliability, Availability, Maintainability (RAM) study of a potential multi-purpose three-terminal HVDC system for integration of offshore wind in the North Sea and interconnection between Norway and Europe. The study investigates availability and reliability performance for three HVDC system configurations; Symmetrical monopole (SMP),
Read more Read lessRigid bipole (RBP) and Full bipole (FBP) with dedicated metallic return (DMR).
The results show that the FBP provides the highest availability for all configurations. However, the SMP offers a compact and space-efficient design with fewer converter components, reduced platform size and significantly lower cost for converter stations and the offshore platform. The
SMP still demonstrates relatively high availability performance and appears therefore to be a competitive alternative to the FBP.
For all HVDC configurations, the main contributors to unavailability are the HVDC cables, scheduled maintenance for converter stations and offshore transformers. The long cable system has the dominant impact on the expected energy availability and reliability performance. It should be emphasized that the failure rates used for the cable system is uncertain due to lack of reliable failure statistics for HVDC cable systems with extruded insulation and that the risk profile for external damage along the cable route is unknown for this generic study.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | B4_11874_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | Norway |
| Study committees | |
| File size | 777 KB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
MEISINGSET Magne - Statnett; VETVIK Idun - Statnett; EVENSET Gunnar - Statnett; HILLESUND Carl Erik - Statnett; KJØSNES Eivind - Aker Solutions; SAGOSEN Øystein - Aker Solutions; RIVIERE Jessika - Aker Solutions; ELMENSHAWY Amin - Aker Solutions; BERGE Markus Vor Dem - RTE International; AKKARI Samy - RTE International
Keywords
Multi-purpose, multi-terminal HVDC interconnector for offshore wind, RAM study.
