Blar i Institutt for elkraftteknikk på forfatter "Jakobsen, Sigurd Hofsmo"
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An open data repository and a data processing software toolset of an equivalent Nordic grid model matched to historical electricity market data
Vanfretti, Luigi; Olsen, Svein H; Arava, VS Narasimham; Laera, Giuseppe; Bidadfar, Ali; Rabuzin, Tin; Jakobsen, Sigurd Hofsmo; Lavenius, Jan; Baudette, Maxime; Gomez-Lopez, Francisco J (Journal article; Peer reviewed, 2017)This article presents an open data repository, the methodology to generate it and the associated data processing software developed to consolidate an hourly snapshot historical data set for the year 2015 to an equivalent ... -
Development of a test system for identification of turbine dynamics using the dc power flow
Jakobsen, Sigurd Hofsmo; Uhlen, Kjetil (Journal article; Peer reviewed, 2018)Recent concerns about the frequency quality in the Nordic power system has lead to increased research on hydro turbine governors. Among this research is the use of system identification methods. However, there has been no ... -
Dynamic simulation of simultaneous HVDC contingencies relevant for vulnerability assessment of the nordic power system
Solvang, Espen Hafstad; Sperstad, Iver Bakken; Jakobsen, Sigurd Hofsmo; Uhlen, Kjetil (Chapter, 2019)Large power-infeed of individual HVDC interconnectors may make the power system vulnerable to contingencies involving multiple HVDC interconnectors. This paper describes and demonstrates an approach to quantitative ... -
Dynamic Simulations of Simultaneous HVDC Contingencies in the Nordic Power System Considering System Integrity Protection Schemes
Solvang, Espen Hafstad (Master thesis, 2018)Individual HVDC links connecting the Nordic power system to other synchronous systems may carry gigawatts of power. For the transmission system operators, who must maintain power balance to operate the grid at 50.0 Hz, the ... -
Enhanced method for reliability of supply assessment - an integrated approach
Gjerde, Oddbjørn; Kjølle, Gerd Hovin; Jakobsen, Sigurd Hofsmo; Vadlamudi, Vijay Venu (Chapter, 2016)A comprehensive analysis of reliability of electricity supply to end users requires a unique set of models, methods and tools. Of special significance are long term power market models for predicting future operating states ... -
Frequency control and stability requirement on Hydro plants: System identification for performance and stability assessment
Jakobsen, Sigurd Hofsmo (Doctoral theses at NTNU;2019:303, Doctoral thesis, 2019)The Nordic transmission system operators (TSOs) have proposed new draft requirements for the providers of frequency containment reserves. These requirements include extensive tests to determine the dynamics of hydro power ... -
Identification of Hydro turbine governors using PMU data
Jakobsen, Sigurd Hofsmo; Uhlen, Kjetil; Bombois, Xavier (Chapter, 2018)Recent concerns for the frequency quality in the Nordic power system has lead to an increased interest in hydro turbine governors. Among this research have been papers on identification of turbine and turbine governor ... -
Investigating G-parameters Modelling of Power Electronc Devices
Jakobsen, Sigurd Hofsmo (Master thesis, 2013)In a world with an ever increasing population, the demand for energy is constantly on the rise. Most countries also agree, that a sustainable development should be ensured. To accomplish this, a higher penetration of ... -
Non-intrusive identification of hydro power plants' dynamics using control system measurements
Jakobsen, Sigurd Hofsmo; Bombois, Xavier; Uhlen, Kjetil (Peer reviewed; Journal article, 2020)In this paper we propose two non-intrusive methods for identifying hydro power plant dynamics using standard system identification techniques. The purpose of the tests is to obtain transfer functions relevant for the ... -
Reference data set for a Norwegian medium voltage power distribution system
Sperstad, Iver Bakken; Fosso, Olav Bjarte; Jakobsen, Sigurd Hofsmo; Eggen, Arnt Ove; Evenstuen, Julie Helen; Kjølle, Gerd Hovin (Peer reviewed; Journal article, 2023)This article describes a reference data set for a representative Norwegian radial, medium voltage (MV) electric power distribution system operated at 22 kV. The data set is developed in the Norwegian research centre CINELDI ... -
Simplified steady-state model for probabilistic operational planning of a power system
Arnesen, Anne Wiig (Master thesis, 2024)Denne masteroppgaven bruker probabilistisk operasjonell planlegging ved hjelp av en steady state modell med en DC approksimasjon til å finne den mest kostnadseffektive strategien for et 25-bus system. Resultatene fra denne ... -
Stability limits for optimal power flow related to congestion management
Haaland, Margrete (Master thesis, 2020)Målet for denne masteroppgaven er å utføre dynamiske simuleringer på en enkel modell med fire samleskinner samt en forenklet modell av det nordiske kraftsystemet (N44) for å bestemme overføringsgrensene for utvalgte linjer. ... -
Testing of a hydro power plant’s stability and performance using PMU and control system data in closed loop
Jakobsen, Sigurd Hofsmo; Uhlen, Kjetil (Journal article; Peer reviewed, 2019)In response to recent concerns regarding deteriorating frequency quality in the Nordic power system, the Nordic transmission system operators (TSOs) have developed draft requirements for the provision of frequency containment ... -
Vector fitting for estimation of turbine governing system parameters
Jakobsen, Sigurd Hofsmo; Uhlen, Kjetil (Chapter, 2017)With the introduction of more and more renewables into the power system both the inertia and the primary frequency reserves are expected to decrease. It is therefore a growing concern that the frequency quality will ... -
Vulnerability analysis of HVDC contigencies in the Norwegian power system
Sperstad, Iver Bakken; Kjølle, Gerd Hovin; Gjerde, Oddbjørn; Vrana, Til Kristian; Jakobsen, Sigurd Hofsmo; Turunen, J.; Haarla, L (Chapter, 2018)In the increasingly interconnected and integrated European power system, transmission system operators need to consider new kinds of risk associated with the interconnection to neighbouring systems. For the Nordic power ...