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Browsing NTNU Open by Author "Hjelmeland, Martin N."

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    • A Case Study on Medium-Term Hydropower Scheduling with Sales of Capacity 

      Hjelmeland, Martin N.; Helseth, Arild; Korpås, Magnus (Peer reviewed; Journal article, 2016)
      This paper conducts a case study on hydropower scheduling considering sales of capacity reserves and impacts of detailed mod-elling. In latter years a growing demand for reserve capacity has been needed to ensure stable ...
    • Coordination of Hydro and Wind Power in a Transmission Constrained Area using SDDP 

      Bødal, Espen Flo; Hjelmeland, Martin N.; Larsen, Camilla Thorrud; Korpås, Magnus (Chapter; Peer reviewed, 2017)
      In this work we use a production scheduling model based on Stochastic Dual Dynamic Programming (SDDP) to investigate the effects of coordinating hydro and wind power production in a transmission-constrained area. A case ...
    • Impact of Modelling Details on the Generation Function for a Norwegian Hydropower Producer 

      Hjelmeland, Martin N.; Helseth, Arild; Korpås, Magnus (Journal article; Peer reviewed, 2018)
      In the following work the generation function relating water discharge to power output for a hydropower station is considered. The conventional approach to modelling the generation function has been to simplify it as a ...
    • Medium-Term hydropower scheduling with variable head under inflow, energyand reserve capacity price uncertainty 

      Hjelmeland, Martin N.; Helseth, Arild; Korpås, Magnus (Journal article; Peer reviewed, 2019)
      We propose a model for medium-term hydropower scheduling (MTHS) with variable head and uncertainty in inflow, reserve capacity, and energy price. With an increase of intermittent energy sources in the generation mix, it ...
    • Medium-Term Hydropower Scheduling: In a Multi-Market Setting 

      Hjelmeland, Martin N. (Doctoral theses at NTNU;2019:130, Doctoral thesis, 2019)
      Regulated hydropower is a flexible resource that is well suited for the provision of ancillary services. Given the opportunity to participate in different markets, the difficult task is to find the optimal allocation between ...
    • Nonconvex Medium-Term Hydropower Scheduling by Stochastic Dual Dynamic Integer Programming 

      Hjelmeland, Martin N.; Zou, Jikai; Helseth, Arild; Ahmed, Shabbir (Journal article; Peer reviewed, 2018)
      Hydropower producers rely on stochastic optimization when scheduling their resources over long periods of time. Due to its computational complexity, the optimization problem is normally cast as a stochastic linear program. ...

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