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It is essential to implement cost-effective operation and maintenance concepts and strategies to achieve a significant reduction of cost of energy from offshore wind farms. A decision support tool (Norwegian offshore wind cost and benefit model – NOWIcob) was developed that simulates the operational...

This paper presents results from laboratory water tree experiments performed on samples of commercially available 6/10 kV XLPE insulated cables. The main purpose of the investigation was to examine possible water tree enhancement, due to mechanical tension of the insulation. During water tree...

Power electronics used for HVDC converters will stress cable insulation with a DC voltage with superimposed transients. The effect these transients have on the performance of the polymeric cable insulation is yet not clear. The main purpose of this work has been to investigate the effect of...

Positive breakdown streamers have been investigated in a short (5 mm) point-plane gap in cyclohexane and n-tridecane with and without the additives N,N-dimethylamine (DMA) with low ionization potential and azobenzene with a not quite as low ionization potential but a very low lowest excitation...

Rapporten analyserer hvor følsom kritiske samfunnsfunksjoner og infrastrukturer er for avbrudd i elektrisitetsforsyningen og hvilke konsekvenser det har for samfunnet. Resultatene viser at det kan forventes store samfunnsmessige konsekvenser for nesten alle infrastrukturer/samfunnsfunksjoner når...

The chemistry of lead and zinc in the bubbling fluidized bed combustion of recovered waste wood (RWW) was studied based on advanced thermodynamic equilibrium calculations. The condensation behavior of zinc and lead compounds in different parts of the boiler was evaluated, and the dependence of the...

This paper presents the analysis of simulation-results of a Mini-Grid system consisting of two SEIGs 0.46 MVA and 0.23 MVA and voltage based generator controllers in SIMPOW®. The typical test-cases include simulation of SEIG, with lead-lag controller and PI controller in Mini-Grid system, when...

Denne kravspesifikasjonen er utarbeidet for å bidra til en felles forståelse om hvilke krav som er ønskelig ved fullskala utbygging av "Avanserte Måle- og Styringssystemer (AMS)" i Norge. Målsettingen er å etablere en kravspesifikasjon som nettselskap kan benytte som et utgangspunkt ved anskaffelse...

Improved energy efficiency is an issue of increasing importance in offshore oil and gas installations. The power on offshore installations is generated by gas turbines operating in a simple cycle. There is an obvious possibility for heat recovery for further power generation from the exhaust heat...