Browsing NTNU Open by Author "Kjølle, Gerd Hovin"
Now showing items 1-11 of 11
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DECRIS - Risk and Decision Systems for Critical Infrastructures. Metode og verktøy for en samlet risikovurdering av kritiske infrastrukturer
Line, Maria Bartnes; Bertelsen, Dag Eiliv; Fridheim, Håvard; Hokstad, Per Richard; Kjølle, Gerd Hovin; Røstum, Jon; Utne, Ingrid Bouwer; Vatn, Gunhild Åm; Vatn, Jørn (SINTEF Rapport;, Research report, 2009)Prosjektet DECRIS er finansiert av Norges forskningsråd under SAMRISK-programmet. Det er et samarbeidsprosjekt mellom SINTEF, FFI og NTNU. Prosjektet har utviklet og tilpasset metoder for risikovurdering for kritisk ... -
Driving forces for intelligent distribution system innovation - results from a foresight process
Hermansen, Tonje Skoglund; Vefsnmo, Hanne; Kjølle, Gerd Hovin; Sand, Kjell (Journal article; Peer reviewed, 2019)The future electricity grid will be a complex system-ofsystems, incorporating various intelligent devices for monitoring, control and automation. The interaction between various technological, regulatory and social factors ... -
Identification, visualization and reduction of risk related to HILP events in power systems
Kiel, Erlend Sandø; Kjølle, Gerd Hovin (Chapter, 2019)High Impact Low Probability (HILP) events in the power system can have severe consequences for society. The concept of power system resilience has recently been applied to study such events. The paper discusses the definition ... -
Modeling Interdependencies with Complex Network Theory in a Combined Electrical Power and ICT System
Myhre, Stine Fleischer; Fosso, Olav B; Heegaard, Poul Einar; Gjerde, Oddbjørn; Kjølle, Gerd Hovin (Chapter, 2020)The extensive integration of information and communication technology (ICT) in the future electrical power system transforms the power system to a cyber physical system (CPS), making it a system-of-systems. This new system ... -
Power supply interruption costs: Models and methods incorporating time dependent patterns
Kjølle, Gerd Hovin (Doktor ingeniøravhandling;1996:101, Doctoral thesis, 1996)The main results of this thesis are improved methods for the estimation of annual interruption costs for delivery points from electricity utilities to the end users. The improvements consist of a combined representation ... -
Scenario selection in composite reliability assessment of deregulated power systems
Kile, Håkon; Uhlen, Kjetil; Kjølle, Gerd Hovin (Journal article; Peer reviewed, 2014)Power market analysis should be incorporated in reliability assessments of deregulated power systems. For the Nordic power system, this is done by using The Multi-area Power-market Simulator (EMPS) for long-term power ... -
Smart fault handling in medium voltage distribution grids
Tutvedt, Kjell Anders; Seguin, R.; Kjølle, Gerd Hovin; Simonsen, Stig; Hermansen, Tonje Skoglund; Myhr, Ingrid (Chapter, 2017)This paper presents first results from a pilot project on using fault indicators and self-healing in medium voltage distribution grids. Directional earth-fault indicators were chosen and deployed in real environments to ... -
The impact of protection system failures and weather exposure on power system reliability
Kiel, Erlend Sandø; Kjølle, Gerd Hovin (Chapter, 2019)Extreme weather is known to cause failure bunching in the electrical transmission system. However, protection systems can also contribute to the worsening of the system state through spontaneous, missing or unwanted operation ... -
The impact of protection systems on power system reliability
Vadlamudi, Vijay Venu; Gjerde, Oddbjørn Idar; Kjølle, Gerd Hovin (SINTEF Energi. Rapport;, Research report, 2014)This report is a collection of memos written to describe the methodology for quantifying the impact of protection systems on power system reliability. Including the effect of protection system response scenarios on a ... -
Transmission line unavailability due to correlated threat exposure
Kiel, Erlend Sandø; Kjølle, Gerd Hovin (Chapter, 2019)Blackouts in the power system are rare events that can have large consequences for society. Successful preparation and prevention of such events calls for models capable of predicting their occurrence. The simultaneous ... -
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 ...