Blar i NTNU Open på forfatter "Aftret, Anna Holm"
-
Simulation and analysis of FCR operation of a Francis turbine
Aftret, Anna Holm (Master thesis, 2017)In the Nordic power system, the frequency quality has decreased significantly over the years. One of the reasons for this is a superimposed periodic frequency oscillation with a time period of around 40-90 seconds, which ...