Blar i SINTEF Open på forfatter "Hågenvik, Hans Olaf"
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A Comprehensive Simulator for Hydropower Investment Decisions
Hågenvik, Hans Olaf; Mathisen, Siri Gulaker; Helseth, Arild; Mo, Birger (Chapter; Peer reviewed, 2022)Due to a higher share of power production from renewable sources with high short-term variation, hydro systems must more often operate closer to their components' physical limits. To simulate system behaviour, a hydropower ... -
Four definitions of magnetic permeability for periodic metamaterials
Skaar, Johannes; Hågenvik, Hans Olaf; Dirdal, Christopher Andrew (Journal article; Peer reviewed, 2019)We state and compare four different definitions of magnetic permeability for periodic, artificial media, or metamaterials. The connections among them, and properties in general, are discussed in detail, including causality, ... -
Higher order multipoles in metamaterial homogenization
Dirdal, Christopher Andres; Hågenvik, Hans Olaf; Haave, Haakon Aamodt; Skaar, Johannes (Journal article; Peer reviewed, 2018)The higher order multipoles above the electric quadrupole are commonly neglected in metamaterial homogenization. We show that they nevertheless can be significant when the second-order spatial dispersive effects, such as ... -
Hydropower Scheduling with State-Dependent Discharge Constraints: An SDDP Approach
Helseth, Arild; Mo, Birger; Hågenvik, Hans Olaf; Schäffer, Linn Emelie (Peer reviewed; Journal article, 2022)Environmental constraints in hydropower systems serve to ensure sustainable use of water resources. Through accurate treatment in hydropower scheduling, one seeks to respect such constraints in the planning phase while ... -
Nonconvex Environmental Constraints in Hydropower Scheduling
Helseth, Arild; Mo, Birger; Hågenvik, Hans Olaf (Chapter, 2020)Environmental constraints in hydropower systems serve to ensure sustainable use of water resources. Through accurate treatment in hydropower scheduling, one seeks to respect such constraints in the planning phase while ...