Browsing NTNU Open by Author "Seyr, Helene"
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Decision Support Models for Operations and Maintenance for Offshore Wind Farms: A Review
Seyr, Helene; Muskulus, Michael (Journal article; Peer reviewed, 2019)This paper reviews the state of the art in offshore wind farm operations and maintenance with a focus on decision support models for the scheduling of maintenance. Factors influential to maintenance planning are collected ... -
Interaction of repair time distributions with a weather model
Seyr, Helene; Muskulus, Michael (Chapter, 2016)Maintenance costs account for a large part of the total cost of energy in offshore wind farms. The influence of uncertainty in the repair duration on the production losses due to maintenance is investigated as a novel ... -
Key performance indicators for wind farm operation and maintenance
Gonzalez, Elena; Nanos, Emmanouil; Seyr, Helene; Valldecabres, Laura; Yürüsen, Nurseda; Smolka, Ursula; Muskulus, Michael; Melero, Julio (Journal article; Peer reviewed, 2017)Key performance indicators (KPI) are tools for measuring the progress of a business towards its goals. Although wind energy is now a mature technology, there is a lack of well-defined best practices to asses the performance ... -
Safety Indicators for the Marine Operations in the Installation and Operating Phase of an Offshore Wind Farm
Seyr, Helene; Muskulus, Michael (Journal article; Peer reviewed, 2016)As a measure of performance, safety indicators are already used for many types of operations, such as in the offshore oil and gas industry. The indicators are used by operators to enhance the safety and performance of the ... -
Stochastic Wind Park Modelling and Maintenance Scheduling under Uncertainty
Seyr, Helene (Doctoral theses at NTNU;2020:146, Doctoral thesis, 2020)In this thesis, my main objective was to enable improved decision making for the scheduling of maintenance for offshore wind farms. The decisions depend on many factors which are subject to uncertainty. The factors were ... -
The Impact of Maintenance Duration on the Downtime of an Offshore Wind Farm - Alternating Renewal Process
Seyr, Helene; Barros, Anne; Muskulus, Michael (Chapter, 2017)Maintenance cost in offshore wind farms are one of the main reasons why it is still not competitive with its onshore counter part. To lower the price of energy, the authors want to improve the modeling of offshore wind ... -
Use of Markov decision processes in the evaluation of corrective maintenance scheduling policies for offshore wind farms
Seyr, Helene; Muskulus, Michael (Journal article; Peer reviewed, 2019)Optimization of the maintenance policies for offshore wind parks is an important step in lowering the costs of energy production from wind. The yield from wind energy production is expected to fall, which will increase the ... -
Using a Langevin model for the simulation of environmental conditions in an offshore wind farm
Seyr, Helene; Muskulus, Michael (Journal article; Peer reviewed, 2018)For the planning of operations and maintenance in offshore wind farms, many simulation models exist. Many rely on artificially generated weather time series to test different strategies. In this paper, we present a novel ... -
Value of information of repair times for offshore windfarm maintenance planning
Seyr, Helene; Muskulus, Michael (Journal article; Peer reviewed, 2016)A large contribution to the total cost of energy in offshore wind farms is due to maintenance costs. In recent years research has focused therefore on lowering the maintenance costs using different approaches. Decision ... -
Vindby - a serious offshore wind farm design game
Dornhelm, Esther; Seyr, Helene; Muskulus, Michael (Journal article; Peer reviewed, 2019)To maintain the increasing interest and development in offshore wind energy, novel training tools for engineers and researchers are needed. Concurrently, educational outreach activities are in demand to inform the public ...