• Convex Relaxations of the Short-Term Hydrothermal Scheduling Problem 

      Helseth, Arild; Jaehnert, Stefan; Diniz, Andre Luiz (Peer reviewed; Journal article, 2020)
      This paper concerns the assessment of two methods for convex relaxation of the short-term hydrothermal scheduling problem. The problem is originally formulated as a mixed integer programming problem, and then approximated ...
    • Evaluating a stochastic-programming-based bidding model for a multireservoir system 

      Aasgård, Ellen; Andersen, Gørild; Fleten, Stein-Erik; Haugstvedt, Daniel (Journal article; Peer reviewed, 2014)
      Hydropower producers need to schedule when to release water from reservoirs and participate in wholesale electricity markets where the day-ahead production is physically traded. A mixed-integer linear stochastic model for ...
    • Optimal Hydropower Maintenance Scheduling in Liberalized Markets 

      Helseth, Arild; Fodstad, Marte; Mo, Birger (Journal article; Peer reviewed, 2018)
      Maintenance scheduling is an important and complex task in hydropower systems. In a liberalized market, the generation company will schedule maintenance periods to maximize the expected profit. This paper describes a method ...
    • System impact studies for near 100% renewable energy systems dominated by inverter based variable generation 

      Holttinen, Hannele; Kiviluoma, Juha; Flynn, Damian; Smith, Charles; Orths, Antje; Eriksen, Peter Børre; Cutululis, Nicolaos Antonio; Söder, Lennart; Korpås, Magnus; Estanqueiro, Ana; MacDowell, Jason; Tuohy, Aidan; Vrana, Til Kristian; O'Malley, Mark (Peer reviewed; Journal article, 2020)
      The demand for low carbon energy calls for close to 100% renewable power systems, with decarbonization of other energy sectors adding to the anticipated paradigm shift. Rising levels of variable inverter-based renewable ...