Key expertise
Our high voltage power system and technology experience and capabilities are in some cases based on our own solutions and in other cases based on solutions from key sub-suppliers. They include the following:
- Topside/onshore HV power equipment
- Variable speed drives
- Transformers
- Circuit breakers
- UPS systems
- HV junction boxes and cable/umbilical terminations
- Ex zone VSD containers/power modules including F&G system, air/water cooling and auxiliary systems
- Subsea HV power equipment
- Subsea Variable Speed Drive Modules
- Subsea Circuit Breaker Modules
- Subsea UPS modules
- Subsea HV termination and connection systems
- Subsea motors
- Subsea power umbilicals
- Including marinisation, assembly and integration of subsea power modules:
- Pressure compensated enclosures
- 1-atm enclosures
- Module structures with ROV panels
- Purpose-built clean environment facilities for assembly and testing of subsea
- power electronics inside the enclosures
- Other solutions
- Long distance power transmission systems, from shore-to-subsea, platform-to-subsea, 125km for Ormen Lange Subsea Compression project and HVDC and AC studies done up to 500km
- Subsea flowline heating systems with electromagnetic and thermal design
- High voltage/low power for subsea control systems
- Terminations from subsea power cables to subsea transformers
- Power supply for electrostatic coalescers
- Complete power system analysis
- Load flow simulations for equipment dimensioning
- Short-circuit calculations
- Earth fault analysis
- Transient studies/real time simulations for start-up/stop and faults/trips
- Harmonics/analysis of frequency response of long cables/umbilicals
- Cost benefit optimisation
- Power loss studies/environmental considerations
- Finite element simulations
- Electromagnetic FEA including induced currents/voltages in cable screens, umbilical steel tubes / control cables, crosstalk between power cables in an umbilical, and between power cables and LV control cables, and eddy currents.
- Thermal FEA
- Dimensioning of power cables, HV connectors, power umbilical, subsea modules (i.e. VSD, transformer)
Many of the ongoing projects are run as internal R&D programs together with oil companies. However, we are also involved in industry development programmes such as the SINTEF Subsea Power Distribution KMB project. This programme focuses on subsea power systems, subsea high voltage insulating materials and subsea power electronics.