Browsing SINTEF Open by Author "Hofmann, Matthias"
Now showing items 1-11 of 11
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A Comparison of Single- and Multi-parameter Wave Criteria for Accessing Wind Turbines in Strategic Maintenance and Logistics Models for Offshore Wind Farms
Sperstad, Iver Bakken; Halvorsen-Weare, Elin Espeland; Hofmann, Matthias; Nonås, Lars Magne; Stålhane, Magnus; Wu, MingKang (Journal article; Peer reviewed, 2014)Different vessel types for transferring technicians for maintenance and inspection of offshore wind farms are often evaluated and compared by their limiting significant wave height for accessing the wind turbines. The ... -
NOWIcob - A tool for reducing the maintenance costs of offshore wind farms
Hofmann, Matthias; Sperstad, Iver Bakken (Peer reviewed; Journal article, 2013)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 ... -
Prosumers’ role in the future energy system
Wolfgang, Ove; Askeland, Magnus; Backe, Stian; Fagerstrøm, Jonathan; Crespo del Grando, Pedro; Hofmann, Matthias; Jaehnert, Stefan; Kvellheim, Ann Kristin; Maranon-Ledesma, Hector; Midthun, Kjetil; Seljom, Pernille; Skjølsvold, Tomas; Sæle, Hanne; Throndsen, William (Research report, 2018)Prosumers are people who consume some of the goods and services that they themselves produce. The supply of electric energy and flexibility services are two distinct services needed in all power systems. The prosumers ... -
Reference cases for verification of operation and maintenance simulation models for offshore wind farms
Dinwoodie, Iain; Endrerud, Ole-Erik Vestøl; Hofmann, Matthias; Martin, Rebecca; Sperstad, Iver Bakken (Journal article; Peer reviewed, 2015)Due to lack of operating experience in the field of offshore wind energy and large costs associated with maintaining offshore wind farms, there is a need to develop accurate operation and maintenance models for strategic ... -
Technical documentation of version 3.3 of the NOWIcob tool
Sperstad, Iver Bakken; Kolstad, Magne Lorentzen; Hofmann, Matthias (SINTEF Energi. Rapport;, Research report, 2017) -
Technical documentation of version 3.3 of the NOWIcob tool
Hofmann, Matthias; Sperstad, Iver Bakken; Kolstad, Magne Lorentzen (SINTEF Energi. Rapport;, Research report, 2017) -
User guide for Version 3.3 of the NOWIcob tool
Sperstad, Iver Bakken; Kolstad, Magne Lorentzen; Hofmann, Matthias (SINTEF Energi; Rapport; TR A7372, Research report, 2017) -
User guide for Version 3.3 of the NOWIcob tool - NOWITECH deloverable DB.1-25
Sperstad, Iver Bakken; Kolstad, Magne Lorentzen; Hofmann, Matthias (SINTEF Energi. Rapport;, Research report, 2017) -
Vulnerability and security in a changing power system
Kjølle, Gerd Hovin; Gjerde, Oddbjørn; Hofmann, Matthias (SINTEF Energi. Rapport;, Research report, 2013)This report presents the main results from the knowledge-building project Vulnerability and security in a changing power system. The main stakeholders of this project are the energy authorities, system operators and network ... -
Vulnerability indicators for electric power grids
Hofmann, Matthias; Kjølle, Gerd Hovin; Gjerde, Oddbjørn (SINTEF Energi. Rapport;TR A7276, Research report, 2013)This report presents a framework and methodology to develop indicators to monitor the vulnerability of the electric power grid. It establishes a scientific foundation by defining vulnerability and the different dimensions ... -
Will 10 MW wind turbines bring down the operation and maintenance cost of offshore wind farms?
Hofmann, Matthias; Sperstad, Iver Bakken (Peer reviewed; Journal article, 2014)Larger wind turbines are believed to be advantageous from an investment and installation perspective, since costs for installation and inner cabling are dependent mainly on the number of wind turbines and not their size. ...