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Here you can find a list of the doctoral theses by the HydroCen PhD candidates.
Through his PhD, Håkon Sundt has looked at the use of remote sensing as a source of information on bathymetry, seasonal mesohabitats for fish, scenarios for mitigation measures and strategies for environmental eDNA sampling.
Read more about his work here
The rapid development towards a more sustainable power system gives rise to complex stochastic optimization problems for hydropower producers. In his thesis, Andreas Kleiven has worked on developing optimization models and methods for sustainable investment and operation of hydropower plants.
In his thesis, Bibek Neupane has tried to better understand how the long-term stability of unlined water tunnels is affected by frequent pressure pulsations due to repeated start/stop sequences.
Henki Ødegaard has looked at new methods for estimating the rock stress which hydropower tunnels are exposed to during the current operation of hydropower plants. Through his PhD he has worked on a new test protocol that can function as a faster alternative for calculating rock stress.
As the share of wind and solar energy production increases, more flexible production and loads are required to control the balance of the grid. In his Thesis, Tor Inge Reigstad proposes a new control method for optimal control of hydropower plants with variable speed.
Experiments as well as some numerical simulations were conducted investigating the resonance region of vortex induced vibrations for different trailing edges of a hydrofoil in channel flow. The study focuses on the usefulness of stream-wise vorticity for the mitigation of vortex induced vibrations for the different trailing edge geometries.
During her PhD, Selen worked on testing the methods for measuring the stability of rock materials in the hydropower plants' "main artery", the tunnels.
Read more about her work here
In his PhD project, Iliev has designed a total of 421(!) turbines, and has by using numerical models found the design that is best for running with variable speed.
In his PhD, Erlend L. Engevik has used numerical models to investigate the design of synchronous machines, and looked at ways to optimize the design.
In his PhD, Solemslie has looked at and developed a publicly available methodology on Pelton turbine geometry and design. He has also produced quantifiable current measurements of the current in the turbine and studied these.