Blar i NTNU Open på forfatter "Tomasgard, Asgeir"
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From linking to integration of energy system models and computational general equilibrium models - Effects on equilibria and convergence
Helgesen, Per Ivar; Tomasgard, Asgeir (Journal article; Peer reviewed, 2018)This paper compares hard-linked and integrated approaches of hybrid top-down and bottom-up models in terms of equilibria and convergence. Four setups where a bottom-up linear programming model is hard-linked with a top-down ... -
Heat and electric vehicle flexibility in the European power system: A case study of Norwegian energy communities
Backe, Stian; Tomasgard, Asgeir; Korpås, Magnus (Peer reviewed; Journal article, 2020)This paper investigates sector coupling between the central power system and local energy communities, including heat supply for buildings and charging of electric vehicles. We propose a stochastic linear programming ... -
Hedging Price Risk for an Electricity Producer with Multistage Distributionally Robust Optimization
Ahlgren, Mikkel Johan Boye; Huse, Andreas Aalberg (Master thesis, 2018)In this thesis, we consider optimal hedging decisions for an electricity producer. In addition to account for uncertain prices and production, we let the underlying probability distribution in itself be subject to uncertainty. ... -
Heuristic solution approach to simultaneous optimization of heat and work integration - A two-level optimization model using genetic algorithms to establish the energy target for maximum heat and work recovery
Borge, Kari Sofie Hall (Master thesis, 2017)Heat integration is of significant importance to the process industry in the efforts of reducing energy consumption and total annual costs. The heat integration problem attempts finding the optimal interconnections of ... -
Hybrid Versus Radial Offshore Wind Connections: Power Grid Investments in the North Sea
Sævareid, Erik; Durakovic, Goran; Knudsen, Brage Rugstad; Straus, Julian; Tomasgard, Asgeir (Chapter, 2022)To enable offshore wind in the North Sea to take a key, rapid role in the European energy transition, massive grid expansions and investments are required. We consider the impact of such grid expansion in the North Sea on ... -
Impact of energy communities on the European electricity and heating system decarbonization pathway: Comparing local and global flexibility responses
Backe, Stian; Zwickl-Bernhard, Sebastian; Schwabeneder, Daniel; Auer, Hans; Korpås, Magnus; Tomasgard, Asgeir (Peer reviewed; Journal article, 2022)This paper investigates how the European electricity and heating system is impacted when medium-scale energy communities (ECs) are developed widely across Europe. We study the response on the capacity expansion of the ... -
The impact of uncertainty and time structure on optimal flexibility scheduling in active distribution networks
Kara, Güray; Pisciella, Paolo; Tomasgard, Asgeir; Farahmand, Hossein (Journal article; Peer reviewed, 2021)The authors focus on a model for system operators that uses centralized scheduling of multiple flexibility assets and services to minimize the cost of managing problems with grid congestion, voltages, and losses. The model ... -
Impacts of Neighbourhood Energy Systems on European Decarbonization Pathways
Backe, Stian (Doctoral theses at NTNU;2021:343, Doctoral thesis, 2021)Variable renewable energy sources are likely to dominate the European electricity market within the next few decades, and understanding the impacts and consequences of this is a common research topic today. Much of existing ... -
Innovasjonsarbeid i FME-ene, mars 2020
Gustavsen, Arild; Kvellheim, Ann Kristin; Medbø, Eirik Gjelsvik; Tomasgard, Asgeir; Coldevin, Grete Håkonsen; Kjølle, Gerd Hovin; Bergmann-Paulsen, Jonas; Brende, Hege; Claussen, Ingrid Camilla; Røkke, Petter Egil; Størset, Sigmund Østtveit; Mølnvik, Mona J.; Haug, Halvard; Marstein, Erik Stensrud (Research report, 2020)Fra innledningen. FME ZEN er et senter for miljøvennlig energi som skal utvikle løsninger for framtidens bygninger og byområder – løsninger som bidrar til at nullut-slippssamfunnet kan realiseres. FME ZEN skal vare i åtte ... -
An integrated analysis of carbon capture and storage strategies for power and industry in Europe
Turgut, Ozgu; Bjerketvedt, Vegard Skonseng; Tomasgard, Asgeir; Roussanaly, Simon (Peer reviewed; Journal article, 2021)Industry is responsible for one-quarter of the global CO2 emissions. In this study, four different climate pathways are analyzed with a cost minimizing multihorizon stochastic optimization model, in order to analyze possible ... -
An Investment Model for Energy Systems in Zero Emission Neighborhoods - A Multi-Horizon Stochastic Programming Approach
Beus, Lea; Hammersbøen, Ingrid; Eldrup, Caroline (Master thesis, 2018)This thesis studies an optimization problem regarding investment planning of energy systems in ZENs, and suggests a two-stage multi-horizon stochastic programming approach. It aims to provide a useful decision tool for ... -
Investment planning under uncertainty in energy systems: Modelling and algorithms
Zhang, Hongyu (Doctoral theses at NTNU;2024:21, Doctoral thesis, 2024)This thesis applies operational research methods for the investment planning of energy systems under uncertainty for the energy transition. We develop new models and solution methods. On the modelling side, we first ... -
Kontraktsdesign mellom en aggregator av forbrukerfleksibilitet og et nettselskap
Brinch, Pernille Cathrine Grüner (Master thesis, 2016)Kraftsystemet slik vi kjenner det er i ferd med å bli brakt inn i en ny teknologisk æra. Ettersom måten vi produserer og konsumerer strøm på endrer seg, må også strømnettet endres. En økt satsning på fornybar energi og ... -
Kostnadsminimering og porteføljeforvaltning for en markedsaggregator i spotmarkedet
Svendby, Christian L. (Master thesis, 2013)I denne masteroppgaven presenteres det en stokastisk beslutningsmodell for en energikunde eller en aggregator med aggregert kundeportefølje. Et generalisert rammeverk er etablert for å kunne analysere flere typer energisystemer ... -
Linepack storage valuation under price uncertainty
Arvesen, Øystein; Medbø, Vegard Gjelsvik; Fleten, Stein-Erik; Tomasgard, Asgeir; Westgaard, Sjur (Journal article; Peer reviewed, 2013)Natural gas flows in pipelines as a consequence of the pressure difference at the inlet and outlet. Adjusting these pressures makes it possible to inject natural gas at one rate and withdraw at a different rate, hence using ... -
Linking Global and Regional Energy Strategies (LinkS)
Bakken, Bjørn Harald; Dalen, Kari; Graabak, Ingeborg; Knudsen, Jørgen Kjetil; Ruud, Audun; Warland, Leif; Wolfgang, Ove; Doorman, Gerard L.; Skar, Christian; Tomasgard, Asgeir; Valdes, Gerardo Alfredo Perez (SINTEF Energi. Rapport;, Research report, 2014)The LinkS project was designed to analyse how global long-term strategies can be used as guidelines for the development of energy supply and technology deployment in regional energy systems. In order to produce recommendations ... -
Local Flexibility Markets in Smart Cities: Interactions Between Positive Energy Blocks
Backe, Stian; Kara, Güray; Crespo del Granado, Pedro; Tomasgard, Asgeir (Journal article; Peer reviewed, 2019)Adoption of solar PV and other distributed generation sources are becoming widespread and affordable across Europe. Local on-site energy production raises the chance to manage surplus energy (especially for variable renewable ... -
Managing Uncertainty in Design and Operation of Natural Gas Infrastructure
Hellemo, Lars (Doctoral thesis at NTNU;2016:128, Doctoral thesis, 2016)Summary of the thesis: This thesis concerns the management of uncertainty in design and operation of natural gas infrastructure by means of mathematical programming. The export of natural gas is an important industry in ... -
Mature offshore oil field development: Solving a real options problem using stochastic dual dynamic integer programming
Bakker, Steffen J.; Kleiven, Andreas; Fleten, Stein-Erik; Tomasgard, Asgeir (Peer reviewed; Journal article, 2021)Oil and gas companies are facing low output prices and are forced to focus on the development of mature fields. Relevant investment decisions for operators include lifetime-enhancing activities, such as drilling new wells ... -
Modeling regional effects of energy policy: Combining technical and economic aspects to assess energy policy
Helgesen, Per Ivar (Doctoral theses at NTNU, 2018:355;, Doctoral thesis, 2018)Summary of the thesis When designing and introducing policy instruments like taxes and subsidies, mathematical models are employed to assess which effects should be expected. Assessments of socioeconomic costs and gains ...