Browsing NTNU Open by Author "Sperstad, Iver Bakken"
Now showing items 1-20 of 23
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A Case Study on the Impact of Vehicle-to-Grid on Reliability of Supply in a Norwegian Distribution System
Hatletveit, Magnus Rein (Master thesis, 2023)Reduksjonen av utslipp for å reversere klimaendringene er en av de viktigste punktene fra bærekrafts-målene fremsatt av Forente Nasjoner. Omfattende elektrifisering av verden har blitt pekt på som ett av de mest lovende ... -
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 ... -
A Practical Application of an Active Distribution Grid Planning Framework in Relation to a Pilot Area for New Energy Solutions
Øye, Erlend (Master thesis, 2021)Oppgaven er relatert til utbyggingen av et område i Bodø, kalt Molobyen, og er tilknyttet FME CINELDIs pilotprosjekt «Development area Molobyen». Målet med oppgaven har vært å undersøke ulike måter å koble Molobyen til ... -
Cost-Benefit Analysis of Battery Energy Storage in Electric Power Grids: Research and Practices
Sperstad, Iver Bakken; Istad, Maren Kristine; Sæle, Hanne; Korpås, Magnus; Oleinikova, Irina; Hänninen, Seppo; Motta, Sergio; Panagiotou, Konstantina; Papadimitriou, Christina; Efthymiou, Venizelos; Træholt, Chresten; Marinelli, Mattia (Chapter, 2020)This paper provides an overview of methods for including Battery Energy Storage Systems (BESS) into electric power grid planning. The general approach to grid planning is the same with and without BESS, but when BESS is ... -
Cost-benefit Evaluation of Remote Inspection of Offshore Wind Farms by Simulating the Operation and Maintenance Phase
Netland, Øyvind; Sperstad, Iver Bakken; Hofmann, Matthias; Skavhaug, Amund (Journal article; Peer reviewed, 2014)This paper presents a cost-benefit evaluation that investigates the potential economic benefits of using remote inspection technology for offshore wind farms. Remote inspection consists of a robot system inside the turbine ... -
Development of a qualitative framework for analysing high-impact low-probability events in power systems
Sperstad, Iver Bakken; Kiel, Erlend Sandø (Chapter, 2018)High-Impact Low-Probability (HILP) events in power systems historically involve a multitude of aspects, including diverse and disparate threats, failures and sequences of events. Each of these aspects are associated with ... -
Dissipative quantum phase transitions and high-temperature superconductors
Sperstad, Iver Bakken (Doktoravhandlinger ved NTNU, 1503-8181; 2012:229, Doctoral thesis, 2012)This thesis presents seven research papers on topics in condensed-matter theory. Five of the papers report on Monte Carlo studies of quantum phase transitions in various (d+1)-dimensional statistical mechanics models ... -
Dynamic simulation of simultaneous HVDC contingencies relevant for vulnerability assessment of the nordic power system
Solvang, Espen Hafstad; Sperstad, Iver Bakken; Jakobsen, Sigurd Hofsmo; Uhlen, Kjetil (Chapter, 2019)Large power-infeed of individual HVDC interconnectors may make the power system vulnerable to contingencies involving multiple HVDC interconnectors. This paper describes and demonstrates an approach to quantitative ... -
Dynamic Simulations of Simultaneous HVDC Contingencies in the Nordic Power System Considering System Integrity Protection Schemes
Solvang, Espen Hafstad (Master thesis, 2018)Individual HVDC links connecting the Nordic power system to other synchronous systems may carry gigawatts of power. For the transmission system operators, who must maintain power balance to operate the grid at 50.0 Hz, the ... -
Energy Storage Scheduling in Distribution Systems Considering Wind and Photovoltaic Generation Uncertainties
Sperstad, Iver Bakken; Korpås, Magnus (Journal article; Peer reviewed, 2019)Flexible distributed energy resources, such as energy storage systems (ESSs), are increasingly considered as means for mitigating challenges introduced by the integration of stochastic, variable distributed generation (DG). ... -
High-Voltage Circuit Breaker Condition-Dependent Failure Rate with Covariates
Grant, Jordon Ashley; Toftaker, Håkon; Perkin, Samuel; Sperstad, Iver Bakken; Vadlamudi, Vijay Venu (Peer reviewed; Journal article, 2024)High-voltage circuit breakers (HVCBs) are essential protection devices which should also be included in power system reliability analysis. When using Monte-Carlo simulation methods the reliability of individual components ... -
Hurtig nettilknytning av hurtigladestasjoner : Resultater fra workshop 2024-02-01
Ekrheim, Stine; Schlüter, Klara Marie; Sperstad, Iver Bakken; Fosli Flataker, Aurora; Torsæter, Bendik Nybakk (SINTEF Energi. Prosjektnotat, Research report, 2024) -
Implementation of Methods for Generation Adequacy Assessment with Wind Considerations
Wuijts, Julian (Master thesis, 2024)Denne oppgaven lager åpen kildekode Python-skript for gjennomføring av generasjonstilstrekkelighetsanalysestudier (tilgjengelig på GitHub). Først konstrueres manus uten vindhensyn, og deretter manusene har blitt modifisert ... -
Integration of Fast-Charging Station in the Distribution System - Exploring the Potential of Alternative Grid Connection Agreements
Aasen, Anna Liv Leikanger (Master thesis, 2023)For å redusere norske klimautslepp frå transportsektoren, som i dag står for nesten 30 % av utsleppa, vil det å fase ut fossil-drivne køyretøy og implementere elektriske køyretøy vere essensielt. Ei betydeleg auke av ... -
Joint optimization of preventive and condition-based maintenance for offshore wind farms
Toftaker, Håkon; Bødal, Espen Flo; Sperstad, Iver Bakken (Peer reviewed; Journal article, 2022)High costs of maintenance and lost production during downtime are a challenge to the offshore wind industry, and there is a great potential to improve cost efficiency by improved maintenance and control strategies utilizing ... -
Operation and Maintenance Modelling
Welte, Thomas Michael; Sperstad, Iver Bakken; Halvorsen-Weare, Elin Espeland; Netland, Øyvind; Nonås, Lars Magne; Stålhane, Magnus (Chapter, 2018)Operational expenditure (OPEX) is one of the major contributors to the levelized cost of energy (LCoE) for offshore wind farms. To assess different solutions and select the best ones, good models for maintenance and logistics ... -
Reference data set for a Norwegian medium voltage power distribution system
Sperstad, Iver Bakken; Fosso, Olav Bjarte; Jakobsen, Sigurd Hofsmo; Eggen, Arnt Ove; Evenstuen, Julie Helen; Kjølle, Gerd Hovin (Peer reviewed; Journal article, 2023)This article describes a reference data set for a representative Norwegian radial, medium voltage (MV) electric power distribution system operated at 22 kV. The data set is developed in the Norwegian research centre CINELDI ... -
Surrogatbasert optimering ved bruk av kunstige nevrale nettverk - Identifikasjon av lønnsomme O&M strategier for offshore vindfarmer gjennom stokastiske simuleringer
Gallala, Marius Rise (Master thesis, 2016)Kostnader tilknyttet drift- og vedlikeholdsoperasjoner utgjør en stor andel av kostnadene for offshore vindparker. Reduksjon av slike kostnader er essensielt for å gjøre energikilden mer konkurransedyktig. Strategier for ... -
Testing the robustness of optimal access vessel fleet selection for operation and maintenance of offshore wind farms
Sperstad, Iver Bakken; Stålhane, Magnus; Dinwoodie, Iain; Endrerud, Ole-Erik Vestøl; Martin, Rebecca; Warner, Ethan (Journal article; Peer reviewed, 2017)Optimising the operation and maintenance (O&M) and logistics strategy of offshore wind farms implies the decision problem of selecting the vessel fleet for O&M. Different strategic decision support tools can be applied to ... -
The LEANWIND suite of logistics optimisation and full lifecycle simulation models for offshore wind farms
McAuliffe, Fiona Devoy; Lynch, Katie; Sperstad, Iver Bakken; Nonås, Lars Magne; Halvorsen-Weare, Elin Espeland; Jones, Dylan; Wall, Graham; Irawan, Chandra; Norstad, Inge; Stålhane, Magnus (Journal article; Peer reviewed, 2018)The offshore wind sector has achieved significant cost reductions in recent years. However, there is still work to be done to maintain and surpass these savings across current and future farms. There is increased competition ...