Browsing NTNU Open by Author "Reigstad, Tor Inge"
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Direct Driven Permanent Magnet Synchronous Generators with Diode Rectifiers for Use in Offshore Wind Turbines
Reigstad, Tor Inge (Master thesis, 2007)This work is focused on direct-driven permanent magnets synchronous generators (PMSG) with diode rectifiers for use in offshore wind turbines. Reactive compensation of the generator, power losses and control of the generator ... -
Flexible Hydropower Unit - HydroCen WP2.5
Uhlen, Kjetil Obstfelder; Reigstad, Tor Inge; Hegglid, Gunne John; Monshizadeh, Shohreh (HydroCen Rapport;51, Research report, 2024)En overordnet målsetting og forskningstema i denne arbeidspakken har vært å utvikle løsninger som bidrar til mer effektiv drift av kraftsystemet. Effektiv drift betyr i denne sammenhengen å kunne øke utnyttelsen av kraftnettet ... -
Impact of present and future HVDC links on the nordic power grid
Vrana, Til Kristian; Aas, Even Strand; Reigstad, Tor Inge; Mo, Olve (Chapter; Peer reviewed, 2017)This article presents preliminary results from ongoing work on establishing a simulation model for R&D activities on the impact of the increasing number of HVDC links in the Nordic power grid. The total HVDC power capacity ... -
Måling, beregning og modellering av dynamikk og dynamisk belastning i vannkraftsystemer
Reigstad, Tor Inge (HydroCen brief;42, Report, 2024) -
Optimal control of variable speed hydropower - Utilising model predictive control and virtual inertia for delivering power system services
Reigstad, Tor Inge (HydroCen brief;Nr. 3, Report, 2021) -
Optimal control of variable speed hydropower Utilising model predictive control and virtual inertia for delivering power system services
Reigstad, Tor Inge (Doctoral theses at NTNU;2021:128, Doctoral thesis, 2021) -
Optimized Control of Variable Speed Hydropower for Provision of Fast Frequency Reserves
Reigstad, Tor Inge; Uhlen, Kjetil (Peer reviewed; Journal article, 2020)This paper deals with the design of controllers for variable speed hydropower (VSHP) plants with the objective of optimize the plants performance. The control objectives imply enabling fast responses to frequency deviations ... -
Stability properties of nonlinear model predictive control of variable speed hydropower
Reigstad, Tor Inge; Uhlen, Kjetil (Peer reviewed; Journal article, 2020)This study presents a method for small-signal analysis of an advanced, multi-variable control system for variable speed hydropower (VSHP) plants. A model predictive controller (MPC) optimises the power plant performance. ... -
Variable Speed Hydropower Conversion and Control
Reigstad, Tor Inge; Uhlen, Kjetil (Peer reviewed; Journal article, 2020)The objective of this paper is to develop and analyse a variable speed hydropower (VSHP) model that can aid the design of controllers that maximize the utilization of power plant for the provision of ancillary services, ... -
Variable speed hydropower plant with virtual inertia control for provision of fast frequency reserves
Reigstad, Tor Inge; Uhlen, Kjetil (Journal article; Peer reviewed, 2020)