2026

• Chatterjee, Kaustav; Biswas, Shuchismita; Varghese, Antos C.; Kincic, Slaven; Uhlen, Kjetil; Ciric, Rade; Oyvang, Thomas; Mishra, Sambeet. (2026) Oscillations in Hydropower-Rich Power Grids: Characterizing Risks, Causes, and Impacts. IEEE Access
  Vitenskapelig artikkel
• Abrahamsen, Fredrik Ege; Brenden, Tuva; Norheim, Ian; Uhlen, Kjetil Obstfelder. (2026) Voltage quality compliance in weak low-voltage distribution feeders: Photovoltaic curtailment and fairness. International Conference on the European Energy Market
  Vitenskapelig artikkel
• Omtveit, Maiken Borud; Quattrociocchi, Alessandro; Uhlen, Kjetil Obstfelder. (2026) Modelling and Control of Industrial Demand Side Flexibility: A Systematic Review. International Conference on the European Energy Market
  Vitenskapelig artikkel
• Monteiro de Souza, Valeria; Uhlen, Kjetil Obstfelder. (2026) Early Warning Early Prevention Strategy for Voltage Instability Phenomena. Norges teknisk-naturvitenskapelige universitet
  Doktoravhandling
• Monteiro de Souza, Valeria; Rodrigues de Brito, Hugo; Uhlen, Kjetil Obstfelder. (2026) Real-time identification and prevention of voltage instability using synchronized phasor measurements. International Journal of Electrical Power & Energy Systems
  Vitenskapelig artikkel

2025

• Molberg, Maurits Sørensen; Uhlen, Kjetil Obstfelder; Albert Rajaretnam, Aldrich Zeno. (2025) An Early Warning Application for Detecting Low-Frequency Oscillations in Power Systems. IEEE PES Innovative Smart Grid Technologies Conference Europe
  Vitenskapelig artikkel
• Rodrigues de Brito, Hugo; Baltensperger, Daniel Simon; Uhlen, Kjetil Obstfelder. (2025) Optimal and Coordinated Voltage Control: Case Study on a 132 kV Norwegian Grid Subsystem.
  Vitenskapelig kapittel
• Rodrigues de Brito, Hugo; Monteiro de Souza, Valeria; Uhlen, Kjetil Obstfelder. (2025) Hierarchical Voltage Control for Improved Dynamic Performance of a Norwegian Grid Subsystem.
  Vitenskapelig kapittel
• Narayan, Erik-Anant Stedjan; Jakobsen, Sigurd Hofsmo; Uhlen, Kjetil Obstfelder. (2025) A Stochastic Approach to Frequency Reserve Modeling Using Artificial Neural Networks.
  Vitenskapelig kapittel
• Baltensperger, Daniel Simon; Rodrigues de Brito, Hugo; Mishra, Sambeet; Øyvang, Thomas; Uhlen, Kjetil Obstfelder. (2025) An optimal reactive power pre-dispatch approach for minimizing active power losses. Frontiers in Energy Research
  Vitenskapelig artikkel
• Elenga Baningobera, Bwandakassy; Oleinikova, Irina; Uhlen, Kjetil Obstfelder. (2025) Design and Implementation of an ASIPS for Frequency Stability in Low Inertia Power Systems. Norges teknisk-naturvitenskapelige universitet
  Doktoravhandling
• Elenga Baningobera, Bwandakassy; Oleinikova, Irina; Uhlen, Kjetil Obstfelder. (2025) Optimizing frequency stability with adaptive fast frequency reserves and Wide-Area Monitoring Systems. International Journal of Electrical Power & Energy Systems
  Vitenskapelig artikkel

2024

• Uhlen, Kjetil Obstfelder; Myhren, Kjell Petter; Haugdal, Hallvar; Baltensperger, Daniel Simon; Finseth, Ole; Albert Rajaretnam, Aldrich Zeno; Monteiro de Souza, Valeria. (2024) Wide Area Monitoring and Protection - Application Developments and IT Infrastructure.
  Vitenskapelig kapittel
• Pokhrel, Basanta Raj; Oleinikova, Irina; D'Arco, Salvatore; Sanchez Acevedo, Santiago; Hoidalen, Hans Kristian; Albert Rajaretnam, Aldrich Zeno; Uhlen, Kjetil Obstfelder. (2024) Advanced Digital Lab Infrastructure for the Development of Smart Power Grid.
  Vitenskapelig kapittel
• Haugdal, Hallvar; D'Arco, Salvatore; Uhlen, Kjetil Obstfelder. (2024) A Platform for Development and Testing of WAMPAC Applications based on Kafka Streaming.
  Vitenskapelig kapittel
• Uhlen, Kjetil Obstfelder; Reigstad, Tor Inge; Hegglid, Gunne John. (2024) Flexible Hydropower Unit. Norwegian Research Centre for Hydropower Technology TRONDHEIM
  Forskningsrapport
• Monteiro de Souza, Valéria; Rodrigues de Brito, Hugo; Uhlen, Kjetil Obstfelder. (2024) Comparative analysis of online voltage stability indices based on synchronized PMU measurements. Sustainable Energy, Grids and Networks
  Vitenskapelig artikkel
• Uhlen, Kjetil Obstfelder; Reigstad, Tor Inge; Hegglid, Gunne John; shohreh, monshizadeh. (2024) Flexible Hydropower Unit. Norwegian Research Centre for Hydropower Technology TRONDHEIM
  Forskningsrapport
• Elenga Baningobera, Bwandakassy; Oleinikova, Irina; Uhlen, Kjetil Obstfelder. (2024) Enhancing Grid Resilience with the Integration of Frequency Response in Renewable Energy Systems.
  Vitenskapelig kapittel
• Elenga Baningobera, Bwandakassy; Oleinikova, Irina; Uhlen, Kjetil Obstfelder; Pokhrel, Basanta Raj. (2024) Challenges and solutions in low-inertia power systems with high wind penetration. IET Generation, Transmission & Distribution
  Vitenskapelig artikkel
• Monteiro de Souza, Valéria; Rodrigues de Brito, Hugo; Uhlen, Kjetil Obstfelder. (2024) Performance Assessment of Voltage Stability Indices for Real-Time Power Margin Estimation.
  Vitenskapelig kapittel
• Rodrigues de Brito, Hugo; Monteiro de Souza, Valéria; Uhlen, Kjetil Obstfelder. (2024) Impact of Secondary Voltage Regulation Dynamics on Transmission-Level Voltage Stability.
  Vitenskapelig kapittel

2023

• Baltensperger, Daniel Simon; Uhlen, Kjetil Obstfelder. (2023) Optimal and predictive under-frequency load shedding against critical islanding contingencies.
  Vitenskapelig kapittel
• Haugdal, Hallvar; Uhlen, Kjetil Obstfelder; Johannsson, Hjortur. (2023) A Novel Phasor Power Oscillation Damper With Adaptive Phase Compensation, Achieved Using Multiple Model Adaptive Estimation. IEEE Transactions on Power Systems
  Vitenskapelig artikkel
• Baltensperger, Daniel Simon; Sanchez Acevedo, Santiago; D'Arco, Salvatore; Uhlen, Kjetil Obstfelder. (2023) Assessing Hardware in the Loop Approaches for Wide-Area Monitoring Control and Protection Devices. IEEE Transactions on Power Delivery
  Vitenskapelig artikkel
• Haugdal, Hallvar; Uhlen, Kjetil Obstfelder; Jóhannsson, Hjörtur. (2023) Achieving Enhanced Phasor POD Performance by Introducing a Control-Input Model.
  Vitenskapelig kapittel
• Rodrigues de Brito, Hugo; Monteiro de Souza, Valeria; Uhlen, Kjetil Obstfelder. (2023) Investigations on Secondary Voltage Control for Long-Term Reactive Power Management.
  Vitenskapelig kapittel
• Monteiro de Souza, Valeria; Rodrigues de Brito, Hugo; Uhlen, Kjetil Obstfelder. (2023) Comparison of Voltage Stability Indices Based on Synchronized PMU Measurements.
  Vitenskapelig kapittel

2022

• Kjølle, Gerd Hovin; Pleym, Anngjerd; Jaehnert, Stefan; Kallset, Vegard Viken; Kiel, Erlend Sandø; Uhlen, Kjetil Obstfelder; Fosso, Olav Bjarte; Gjerde, Oddbjørn. (2022) Hvor sårbart er vårt elektriske energisystem? Arendalsuka 2022. SINTEF Energi AS
  Annen rapport
• Baltensperger, Daniel Simon; Uhlen, Kjetil Obstfelder. (2022) Optimal Coordination of Multiple System Protection Schemes against Critical Overload Conditions.
  Vitenskapelig kapittel

2021

• Haugdal, Hallvar; Uhlen, Kjetil Obstfelder; Jóhannsson, Hjörtur. (2021) An Open Source Power System Simulator in Python for Efficient Prototyping of WAMPAC Applications.
  Vitenskapelig kapittel
• Monshizadeh, Shohreh; Uhlen, Kjetil; Hegglid, Gunne John. (2021) Transmission Loss Minimization Using Artificial Intelligent Algorithm for Nordic44 Network Model based on Hourly Load Variation. IFAC-PapersOnLine
  Vitenskapelig artikkel
• Baltensperger, Daniel Simon; Uhlen, Kjetil; Sanchez Acevedo, Santiago; D'Arco, Salvatore. (2021) Experimental Characterization of Methods for Connecting Real-Time Simulations and Synchrophasors.
  Vitenskapelig kapittel
• Reigstad, Tor Inge; Uhlen, Kjetil Obstfelder. (2021) Nonlinear model predictive control of variable speed hydropower for provision of fast frequency reserves. Electric power systems research
  Vitenskapelig artikkel
• Reigstad, Tor Inge; Uhlen, Kjetil Obstfelder. (2021) Variable Speed Hydropower for Provision of Fast Frequency Reserves in the Nordic Grid. IEEE Transactions on Power Systems
  Vitenskapelig artikkel

2020

• Haugdal, Hallvar; Uhlen, Kjetil; Müller, Daniel; Jóhannsson, Hjörtur. (2020) Estimation of Oscillatory Mode Activity from PMU Measurements.
  Vitenskapelig kapittel
• Jakobsen, Sigurd Hofsmo; Bombois, Xavier; Uhlen, Kjetil. (2020) Non-intrusive identification of hydro power plants’ dynamics using control system measurements. International Journal of Electrical Power & Energy Systems
  Vitenskapelig artikkel
• Reigstad, Tor Inge; Uhlen, Kjetil. (2020) Stability properties of nonlinear model predictive control of variable speed hydropower. IET Control Theory & Applications
  Vitenskapelig artikkel
• Reigstad, Tor Inge; Uhlen, Kjetil. (2020) Variabel hastighet i kraftverk. Energiteknikk : fagbladet for energibransjen
  Vitenskapelig artikkel
• Reigstad, Tor Inge; Uhlen, Kjetil. (2020) Variable Speed Hydropower Conversion and Control. IEEE transactions on energy conversion
  Vitenskapelig artikkel
• Reigstad, Tor Inge; Uhlen, Kjetil. (2020) Variable speed hydropower plant with virtual inertia control for provision of fast frequency reserves. International Journal of Power and Energy Systems
  Vitenskapelig artikkel
• Reigstad, Tor Inge; Uhlen, Kjetil. (2020) Optimized Control of Variable Speed Hydropower for Provision of Fast Frequency Reserves. Electric power systems research
  Vitenskapelig artikkel

2019

• Hillberg, Emil; Zegers, Antony; Herndler, Barbara; Wong, Steven; Wong, Steven; Pompee, Jean; Bourmaud, Jean-Yves; Lehnhoff, Sebastian; Migliavacca, Gianluigi; Uhlen, Kjetil. (2019) Flexibility needs in the future power system. ISGAN
  Forskningsrapport
• Uhlen, Kjetil; Endegnanew, Atsede Gualu; Haileselassie, Temesgen Mulugeta. (2019) Operation and Control of hybrid AC/DC transmission grids.
  Vitenskapelig kapittel
• Berglund, Frida; Zaferanlouei, Salman; Korpås, Magnus; Uhlen, Kjetil. (2019) Optimal Operation of Battery Storage for a Subscribed Capacity-Based Power Tariff Prosumer—A Norwegian Case Study. Energies
  Vitenskapelig artikkel
• Na, Shweta; Kishor, Nand; Uhlen, Kjetil; Mohanty, Soumya R. (2019) Detecting instant of multiple faults on the transmission line and its types using time-frequency analysis. IET Generation, Transmission & Distribution
  Vitenskapelig artikkel
• Uhlen, Kjetil. (2019) Resultatrapport NFR Project no 246784: Operation of the Smart Grid With Wide Area Information. Norges teknisk-naturvitenskapelige universitet
  Forskningsrapport
• Jakobsen, Sigurd Hofsmo; Uhlen, Kjetil. (2019) Testing of a hydropower plant’s stability and performance using PMU and control system data in closed loop. IET Generation, Transmission & Distribution
  Vitenskapelig artikkel
• Haugdal, Hallvar; Uhlen, Kjetil. (2019) Power Oscillation Monitoring using Statistical Learning Methods.
  Vitenskapelig kapittel
• Solvang, Espen Hafstad; Sperstad, Iver Bakken; Jakobsen, Sigurd Hofsmo; Uhlen, Kjetil. (2019) Dynamic simulation of simultaneous HVDC contingencies relevant for vulnerability assessment of the nordic power system.
  Vitenskapelig kapittel
• Haugdal, Hallvar; Uhlen, Kjetil. (2019) Mode Shape Estimation using Complex Principal Component Analysis and k-Means Clustering.
  Vitenskapelig kapittel

2018

• Endegnanew, Atsede Gualu; Kalemba, Lester; Uhlen, Kjetil. (2018) Using Decentralized Control Techniques for Interaction Analysis in Hybrid AC/DC Grids.
  Vitenskapelig kapittel
• Kalemba, Lester; Uhlen, Kjetil; Hovd, Morten. (2018) Stability Assessment of Power Systems Based on a Robust Sum-of-Squares Optimization Approach.
  Vitenskapelig kapittel
• Sanchez Acevedo, Santiago; Duong, Dinh Thuc; Taffese, Abel Assegid; Uhlen, Kjetil; Tedeschi, Elisabetta. (2018) Performance evaluation of the empirical method for online detection of power oscillations: a multiterminal HVDC application.
  Vitenskapelig kapittel
• Parreiras, TJMA; Gomes, S; Taranto, Glauco Nery; Uhlen, Kjetil. (2018) Closest security boundary for improving oscillation damping through generation redispatch using eigenvalue sensitivities. Electric power systems research
  Vitenskapelig artikkel
• Jakobsen, Sigurd Hofsmo; Uhlen, Kjetil; Bombois, Xavier. (2018) Identification of Hydro turbine governors using PMU data.
  Vitenskapelig kapittel
• Solvang, Espen Hafstad; Uhlen, Kjetil. (2018) Dynamic Simulations of Simultaneous HVDC Contingencies in the Nordic Power System Considering System Integrity Protection Schemes. Norges teknisk-naturvitenskapelige universitet
  Masteroppgave
• Tuttelberg, Kaur; Kilter, Jako; Wilson, Douglas; Uhlen, Kjetil. (2018) Estimation of Power System. IEEE Transactions on Power Systems
  Vitenskapelig artikkel
• Negi, Sanjay S.; Kishor, Nand; Negi, Richa; Uhlen, Kjetil. (2018) Event signal characterization for disturbance interpretation in power grid.
  Vitenskapelig kapittel
• Anaya-Lara, Olimpo; Tande, John Olav Giæver; Uhlen, Kjetil; Merz, Karl Otto. (2018) Offshore Wind energy technology. John Wiley & Sons
  Antologi
• Andresen, Christian Andre; Torsæter, Bendik Nybakk; Haugdal, Hallvar; Uhlen, Kjetil. (2018) Fault Detection and Prediction in Smart Grids.
  Vitenskapelig kapittel
• Karlsen, David; Uhlen, Kjetil; Vormedal, L. (2018) Introducing PMU-based Applications in the Control Room Setting.
  Vitenskapelig kapittel
• Jakobsen, Sigurd Hofsmo; Uhlen, Kjetil. (2018) Development of a test system for identification of turbine dynamics using the dc power flow. IFAC-PapersOnLine
  Vitenskapelig artikkel

2017

• Endegnanew, Atsede Gualu; Bergna-Diaz, Gilbert; Uhlen, Kjetil. (2017) Avoiding AC/DC grid interaction in MMC based MTDC Systems.
  Vitenskapelig kapittel
• Jha, Shailendra Kumar; Støa, Petter; Uhlen, Kjetil. (2017) Green and hybrid microgrid for rural electrification.
  Vitenskapelig kapittel
• Polster, Stefan; Renner, Herwig; Duong, Dinh Thuc; Uhlen, Kjetil. (2017) Voltage Stability Monitoring using a Modified Thevenin Impedance.
  Vitenskapelig kapittel
• Duong, Dinh Thuc; Uhlen, Kjetil. (2017) A Topology-based Scheme for Adaptive Underfrequency Load Shedding.
  Vitenskapelig kapittel
• Zangmo, Gayleg; Om, Khandu; Uhlen, Kjetil. (2017) Impact of hydro-turbine and governor parameters on stability of grid connected power system. International Journal on Electrical Engineering and Informatics
  Vitenskapelig artikkel
• Negi, Sanjay Singh; Kishor, Nand; Kumar, Avinash; Uhlen, Kjetil. (2017) Signal processing for time-frequency representation of synchro-phasor data. IET Generation, Transmission & Distribution
  Vitenskapelig artikkel
• Negi, Sanjay Singh; Kishor, Nand; Uhlen, Kjetil; Negi, Richa. (2017) Event Detection and its Signal Characterization in PMU Data Stream. IEEE Transactions on Industrial Informatics
  Vitenskapelig artikkel
• Schweta, NN; Kishor, Nand; Uhlen, Kjetil; Soumya, Mohanty. (2017) Identification of coherency and critical generators set in real-time signal. IET Generation, Transmission & Distribution
  Vitenskapelig artikkel
• Negi, Sanjay Singh; Kishor, Nand; Uhlen, Kjetil; Negi, Richa. (2017) Post-processing algorithmfor damped and step-change events detection in PMU signals.
  Vitenskapelig kapittel
• Shweta, NN; Kishor, Nand; Uhlen, Kjetil; Mohanty, S.. (2017) Time-varying coherency study using TFC.
  Vitenskapelig kapittel
• Jakobsen, Sigurd Hofsmo; Uhlen, Kjetil. (2017) Vector fitting for estimation of turbine governing system parameters.
  Vitenskapelig kapittel

2016

• Duong, Dinh Thuc; Uhlen, Kjetil; Jansson, Erik Alexander. (2016) Estimation of hydro turbine-governor system's transfer function from PMU measurements. IEEE Power & Energy Society General Meeting
  Vitenskapelig artikkel
• Endegnanew, Atsede Gualu; Uhlen, Kjetil. (2016) Coordinated Converter Control Strategy in Hybrid AC/DC Power Systems for System Frequency Support. Energy Procedia
  Vitenskapelig artikkel
• Endegnanew, Atsede Gualu; Uhlen, Kjetil. (2016) Global analysis of frequency stability and inertia in AC systems interconnected through an HVDC.
  Vitenskapelig kapittel
• Endegnanew, Atsede Gualu; Haileselassie, Temesgen Mulugeta; Uhlen, Kjetil; Anaya-Lara, Olimpo. (2016) Transient stability analysis in multi-terminal VSC-HVDC grids.
  Vitenskapelig kapittel
• Ersdal, Anne Mai; Imsland, Lars Struen; Uhlen, Kjetil. (2016) Model Predictive Load-Frequency Control. IEEE Transactions on Power Systems
  Vitenskapelig artikkel
• Uhlen, Kjetil; Jaehnert, Stefan; Hamon, Camille; Bruno, C; Farahmand, Hossein; Inoue, Takehiro; Matevosjana, I; Nobel, F. A.; Sørensen, P.. (2016) Analytical Techniques and tools for power balancing assessments. CIGRE (Conseil international des grands réseaux électriques)
  Forskningsrapport
• Endegnanew, Atsede Gualu; Uhlen, Kjetil; Bergna Diaz, Gilbert; Beerten, Jef. (2016) Small-signal modelling of an MMC-based HVDC link interfacing large AC systems.
  Vitenskapelig kapittel
• Sanchez Acevedo, Santiago; Tedeschi, Elisabetta; Uhlen, Kjetil; Djustrom, Jam; Ehnberg, Jimmy; Segundo, Rafael; Korba, Petr; Oleinikova, Irina; Mutule, Anna; Hillberg, Emil. (2016) CloudGrid – the development of a transnational smart grid lab cooperation. 21 Annual international conference on innovation Baltic Dynamics 2016
  Forskningsrapport
• Kalemba, Lester; Uhlen, Kjetil; Hovd, Morten. (2016) Two-tier approach for the design of multiple power oscillation damping controllers. IEEE (Institute of Electrical and Electronics Engineers)
  Antologi
• Uhlen, Kjetil; Jaehnert, Stefan; Hamon, Camille; Bruno, C; Farahmand, Hossein; Inoue, T; Matevosjana, J; Nobel, F. A.; Sørensen, P.. (2016) Analytical techniques and tools for power balancing assessments. Cigre Science & Engineering
  Vitenskapelig artikkel
• Dharmawardena, Hasala; Uhlen, Kjetil; Gjerde, Sverre Skalleberg. (2016) Modelling wind farm with synthetic inertia for power system dynamic studies.
  Vitenskapelig kapittel
• Kumar, Avinash; Negi, Sanjay Singh; Kishor, Nand; Uhlen, Kjetil. (2016) Signal processing and classification of synchro-phasor data.
  Vitenskapelig kapittel
• Ersdal, Anne Mai; Imsland, Lars Struen; Uhlen, Kjetil; Fabozzi, Davide; Thornhill, Nina F.. (2016) Model predictive load–frequency control taking into account imbalance uncertainty. Control Engineering Practice
  Vitenskapelig artikkel
• Jha, S.K.; Støa, Petter; Uhlen, Kjetil. (2016) Socio-economic impact of a rural microgrid.
  Vitenskapelig kapittel

2015

• Duong, Dinh Thuc; Uhlen, Kjetil; Taranto, Glauco Nery; Løvlund, Stig. (2015) A Comparative Case Study of Online Voltage Instability Monitoring.
  Vitenskapelig kapittel
• Kalemba, Lester; Uhlen, Kjetil; Hovd, Morten. (2015) A scheme for optimal coordination of reactive-power reserves in a large power system.
  Vitenskapelig kapittel
• Preda, Traian Nicolae; Uhlen, Kjetil. (2015) A test distribution grid for study of slow coherency concept.
  Vitenskapelig kapittel
• Tai, Vin Cent; Uhlen, Kjetil. (2015) Resampling of data for offshore grid design based on kernel density estimation and genetic algorithm. Energy Procedia
  Vitenskapelig artikkel
• Uhlen, Kjetil. (2015) Smart Transmission Grids Operation and Control (STRONgrid) Sustainable Energy Systems 2050. NTNU
  Forskningsrapport
• Leelaruji, Rujiroj; Vanfretti, L; Uhlen, Kjetil; Gjerde, Jan Ove. (2015) Computing sensitivities from synchrophasor data for voltage stability monitoring and visualization. International Transactions on Electrical Energy Systems
  Vitenskapelig artikkel
• Haileselassie, Temesgen Mulugeta; Endegnanew, Atsede Gualu; Uhlen, Kjetil. (2015) Secondary control in multi-terminal VSC-HVDC transmission system.
  Vitenskapelig kapittel
• Duong, Dinh Thuc; Kalemba, Lester; Uhlen, Kjetil; Løvlund, Stig. (2015) A scheme for coordinated secondary voltage control for systems with multiple VAr reserves.
  Vitenskapelig kapittel
• Dharmawardena, Hasala Indika; Uhlen, Kjetil. (2015) Modeling variable speed Wind turbine for power system dynamic studies.
  Vitenskapelig kapittel
• Endegnanew, Atsede Gualu; Satertro, Kristian; Gjerde, Sverre Skalleberg; Svendsen, Harald Georg; Anaya-Lara, Olimpo; Tande, John Olav Giæver; Uhlen, Kjetil; Gjolmesli, Svein. (2015) Integrated modelling platform for dynamic performance assessment of floating wind turbines. Energy Procedia
  Vitenskapelig artikkel
• Endegnanew, Atsede Gualu; Uhlen, Kjetil. (2015) Investigation of Dynamic Behaviour of AC/DC Power Systems.
  Vitenskapelig kapittel
• Endegnanew, Atsede Gualu; Beerten, Jef; Uhlen, Kjetil. (2015) Dynamic Interactions between Asynchronous Grids Interconnected through an MTDC System.
  Vitenskapelig kapittel
• Støylen, Hanne; Uhlen, Kjetil; Årdal, Atle Rygg. (2015) Laboratory demonstration of inertial response from VSC-HVDC connected wind farms.
  Vitenskapelig kapittel

2014

• Duong, Dinh Thuc; Uhlen, Kjetil. (2014) Analysis of Impacts of SVC on Voltage Collapse Mechanism and Maximum Loadability.
  Vitenskapelig kapittel
• Jha, S.K.; Støa, Petter; Uhlen, Kjetil. (2014) Microgrid: Prospects and challenges in Nepal.
  Vitenskapelig kapittel
• Kile, Håkon; Uhlen, Kjetil; Kjølle, Gerd Hovin. (2014) Scenario selection in composite reliability assessment of deregulated power systems. International Journal of Electrical Power & Energy Systems
  Vitenskapelig artikkel
• Tai, Vin Cent; Uhlen, Kjetil. (2014) Design and Optimisation of Offshore Grids in Baltic Sea for Scenario Year 2030. Energy Procedia
  Vitenskapelig artikkel
• Marvik, Jorun Irene; Tande, John Olav Giæver; Uhlen, Kjetil. (2014) Wind farm voltage dip measurements. Wind Energy
  Vitenskapelig artikkel
• Kile, Håkon; Uhlen, Kjetil; Warland, Leif; Kjølle, Gerd Hovin. (2014) A Comparison of AC and DC Power Flow Models for Contingency and Reliability Analysis.
  Vitenskapelig kapittel
• Preda, Traian Nicolae; Uhlen, Kjetil; Hadjsaid, Nouredine. (2014) Dynamic Equivalents of Active Distribution Grids Based on Model Parameters Identification.
  Vitenskapelig kapittel
• Duong, Dinh Thuc; Uhlen, Kjetil; Løvlund, Stig. (2014) A Method for Real Time Voltage Stability Monitoring in Sub-transmission Networks.
  Vitenskapelig kapittel
• Støylen, Hanne; Uhlen, Kjetil; Årdal, Atle Rygg; Sharifabadi, Kamran Torki. (2014) Laboratory demonstration of an offshore grid in the North Sea with DC droop control.
  Vitenskapelig kapittel

2013

• Toftevaag, Trond; Preda, Traian Nicolae; Uhlen, Kjetil. (2013) Impact of voltage phase angle changes on low-voltage ride-through performance of small scale hydro DG units.
  Vitenskapelig kapittel
• Kile, Håkon; Uhlen, Kjetil; Kjølle, Gerd Hovin. (2013) The Important Role of Feature Selection when Clustering Load and Generation Scenarios.
  Vitenskapelig kapittel
• Preda, Traian Nicolae; Uhlen, Kjetil; Nordgård, Dag Eirik. (2013) Clustering Distributed Generation Using the Instantaneous Euclidean Distance in Polar Coordinates.
  Vitenskapelig kapittel
• Preda, Traian Nicolae; Uhlen, Kjetil; Nordgård, Dag Eirik. (2013) Códigos de rede atuais para integração da geração distribuída. Eletricidade Moderna
  Vitenskapelig artikkel
• Preda, Traian Nicolae; Uhlen, Kjetil; Nordgård, Dag Eirik; Toftevaag, Trond. (2013) Dynamic equivalents of active distribution power systems for investigation of transient stability.
  Vitenskapelig kapittel
• He, Wei; Uhlen, Kjetil; Hadiya, Maheshkumar; Shi, Gang; Rio, Emilio del. (2013) Case Study of Integrating an Offshore Wind Farm with Offshore Oil and Gas Platforms and with an Onshore Electrical Grid. Journal of Renewable Energy
  Vitenskapelig artikkel
• Kile, Håkon; Uhlen, Kjetil; Kjølle, Gerd Hovin. (2013) Scenario Selection by Unsupervised Learning in Reliability Analysis of Transmission Networks.
  Vitenskapelig kapittel
• Haileselassie, Temesgen Mulugeta; Uhlen, Kjetil. (2013) Power System Security in a Meshed North Sea HVDC Grid. Proceedings of the IEEE
  Vitenskapelig artikkel
• Duong, Dinh Thuc; Uhlen, Kjetil. (2013) Online voltage stability monitoring based on PMU measurements and system topology.
  Vitenskapelig kapittel
• Anaya-Lara, Olimpo; Tande, John Olav Giæver; Uhlen, Kjetil; Adaramola, Muyiwa S.. (2013) Control Challenges and Possibilities for Offshore Wind Farms. SINTEF Energi AS
  Forskningsrapport

2012

• Preda, Traian Nicolae; Uhlen, Kjetil; Nordgård, Dag Eirik; Toftevaag, Trond. (2012) External Grid Representation for Assessing Fault Ride Through Capabilities of Distributed Generation Units.
  Vitenskapelig kapittel
• Preda, Traian Nicolae; Uhlen, Kjetil; Nordgård, Dag Eirik. (2012) An overview of the present grid codes for integration of distributed generation.
  Vitenskapelig kapittel
• Storvann, V; Johansson, Emil; Uhlen, Kjetil. (2012) Indicating and Mitigating Voltage Collapse Comparing Voltage Stability Indicators. IEEE PES Innovative Smart Grid Technologies Conference Europe
  Vitenskapelig artikkel
• Ersdal, Anne Mai; Imsland, Lars Struen; Uhlen, Kjetil. (2012) Coordinated Control of Multiple HVDC links using backstepping. Proceedings of the IEEE Conference on Control Applications
  Vitenskapelig artikkel
• Tande, John Olav Giæver; Korpås, Magnus; Uhlen, Kjetil. (2012) Planning and Operation of Large Offshore Wind Farms in Areas with Limited Power Transfer Capacity. Wind Engineering : The International Journal of Wind Power
  Vitenskapelig artikkel
• Kile, Håkon; Uhlen, Kjetil. (2012) Supervised and Unsupervised Learning in Composite Reliability Evaluation.
  Vitenskapelig kapittel
• Hillberg, Karl Emil; Trengereid, F.; Breidablik, Ø.; Uhlen, Kjetil; Kjølle, Gerd Hovin; Løvlund, S.; Gjerde, J.O.. (2012) System Integrity Protection Schemes - Increasing operational Security and System Capacity.
  Vitenskapelig kapittel
• Kalcon, Giddani O.; Adam, Grain P.; Anaya-Lara, Olimpo; Lo, Stephen; Uhlen, Kjetil. (2012) Small-Signal Stability Analysis of Multi-Terminal VSC-Based DC Transmission Systems. IEEE Transactions on Power Systems
  Vitenskapelig artikkel
• Preda, Traian Nicolae; Uhlen, Kjetil; Nordgård, Dag Eirik. (2012) Instantaneous Harmonics Compensation using Shunt Active Filters in a Norwegian Distribution Power System with Large Amount of Distributed Generation.
  Vitenskapelig kapittel
• Uhlen, Kjetil; Vanfretti, L; Oliveira, M de; Leirbukt, Albert; Aarstand, Vemund Halmo; Gjerde, Jan. (2012) Wide-Area Power Oscillation Damper Implementation and Testing in the Norwegian Transmission Network. IEEE Power & Energy Society General Meeting
  Vitenskapelig artikkel
• Haileselassie, Temesgen Mulugeta; Uhlen, Kjetil. (2012) Impact of DC Line Voltage Drops on Power Flow of MTDC Using Droop Control. IEEE Transactions on Power Systems
  Vitenskapelig artikkel
• Haileselassie, Temesgen Mulugeta; Uhlen, Kjetil. (2012) Precise control of power flow in multiterminal VSC-HVDCs using DC voltage droop control.
  Vitenskapelig kapittel
• Kile, Håkon; Uhlen, Kjetil. (2012) Averanging Operating States with Infinite Mixtures in Reliability Analysis of Transmission Networks.
  Vitenskapelig kapittel
• Haileselassie, Temesgen Mulugeta; Uhlen, Kjetil; Undeland, Tore Marvin. (2012) Control, Dynamics and Operation of Multi-terminal VSC-HVDC Transmission Systems. Norges teknisk-naturvitenskapelige universitet
  Doktoravhandling
• Lindeberg, Eivind; Svendsen, Harald Georg; Uhlen, Kjetil. (2012) Smooth Transition Between Controllers for Floating Wind Turbines. Energy Procedia
  Vitenskapelig artikkel
• Uhlen, Kjetil; Cirio, Diego. (2012) IEA Implementing Agreement on Electricity Networks Analysis, Research & Development (ENARD)Annex IV: - Transmission SystemsFinal report. SINTEF Energi AS
  Forskningsrapport
• Kile, Håkon; Uhlen, Kjetil. (2012) Data reduction via clustering and averaging for contingency and reliability analysis. International Journal of Electrical Power & Energy Systems
  Vitenskapelig artikkel

2011

• Svendsen, Harald Georg; Hadiya, Maheshkumar; Øyslebø, Eirik Veirød; Uhlen, Kjetil. (2011) Integration of offshore wind farm with multiple oil and gas platforms.
  Vitenskapelig kapittel
• Uhlen, Kjetil; Cirio, D; Haarla, L; Bekaert, D; Jensen, KB; Duthaler, C; Vormedal, L; Larsson, S; Fodstad, L. A.. (2011) Quais os desafios e como serao os sistemas de transmissao do futuro?. Eletricidade Moderna
  Vitenskapelig artikkel
• Haileselassie, Temesgen Mulugeta; Uhlen, Kjetil; Tande, John Olav Giæver; Anaya-Lara, Olimpo. (2011) Connection Scheme for North Sea Offshore Wind Integration to UK and Norway: Power Balancing and Transient Stability Analysis.
  Vitenskapelig kapittel
• Haileselassie, Temesgen Mulugeta; Torres Olguin, Raymundo E.; Vrana, Til Kristian; Uhlen, Kjetil; Undeland, Tore Marvin. (2011) Main Grid Frequency Support Strategy for VSC-HVDC Connected Wind Farms with Variable Speed Wind Turbines.
  Vitenskapelig kapittel
• Haileselassie, Temesgen Mulugeta; Uhlen, Kjetil. (2011) Power Flow Analysis of Multi-terminal HVDC Networks.
  Vitenskapelig kapittel
• Baker, John; Brunner, Helfried; Sinclair, John; Uhlen, Kjetil; Cirio, Diego. (2011) ENARD: Results from the First 5 year Term of International Collaboration in electricity networks. CIRED Conference Proceedings
  Vitenskapelig artikkel
• Johansson, Emil; Uhlen, Kjetil; Kjølle, Gerd; Toftevaag, Trond. (2011) RELIABILITY EVALUATION OF WIDE AREA MONITORING APPLICATIONS AND EXTREME CONTINGENCIES.
  Vitenskapelig kapittel
• Endegnanew, Atsede Gualu; Sætertrø, Kristian; Gjerde, Sverre Skalleberg; Svendsen, Harald Georg; Anaya-Lara, Olimpo; Tande, John Olav Giæver; Uhlen, Kjetil; Gjølmesli, Svein. (2011) Performance assessment of floating wind turbines during grid faults.
  Vitenskapelig kapittel

2010

• He, Wei; Jacobsen, Gunnar; Anderson, Tiit; Olsen, Freydar; Hanson, Tor; Korpås, Magnus; Toftevaag, Trond; Eek, Jarle; Uhlen, Kjetil; Johansson, Emil. (2010) The Potential of Integrating Wind Power with Offshore Oil and Gas Platforms. Wind Engineering : The International Journal of Wind Power
  Vitenskapelig artikkel
• Chaudhuri, N.R.; Domahidi, A.; Majumder, R.; Chaudhuri, B.; Korba, P.; Ray, S.; Uhlen, Kjetil. (2010) Wide-area power oscillation damping control in Nordic equivalent system. IET Generation, Transmission & Distribution
  Vitenskapelig artikkel
• Johansson, Emil; Uhlen, Kjetil; Nybø, Agnes; Kjølle, Gerd; Gjerde, Oddbjørn. (2010) Extraordinary events: Understanding sequence, causes, and remedies.
  Vitenskapelig kapittel
• Chaudhuri, Nilanjan Ray; Domahidi, Alexander; Chaudhuri, Balarko; Majumder, Rajat; Korba, Petr; Ray, Swakshar; Uhlen, Kjetil. (2010) Power oscillation damping control using wide-area signals: A case study on Nordic equivalent system.
  Vitenskapelig kapittel
• Uhlen, Kjetil; Cirio, D; Haarla, L; Bekaert, K.; Jensen, KB; Duthaler, C; Vormedal, L; Larsson, S; Fodstad, Lars August. (2010) IEA Enard: - International collaboration on developments in transmission systems R&D.
  Vitenskapelig kapittel
• Korba, Petr; Uhlen, Kjetil. (2010) Wide-area monitoring of electromechanical oscillations in the Nordic power system: practical experience. IET Generation, Transmission & Distribution
  Vitenskapelig artikkel
• Haileselassie, Temesgen M.; Uhlen, Kjetil. (2010) Primary Frequency Control of Remote Grids Connected by Multi-terminal HVDC. IEEE Power Engineering Society General Meeting
  Vitenskapelig artikkel

2009

• Tande, John Olav Giæver; Korpås, Magnus; Warland, Leif; Uhlen, Kjetil; Hulle, Frans van. (2009) Impact of TradeWind offshore wind power capacity scenarios on power flows in the European HV network.
  Vitenskapelig kapittel
• Warland, Leif; Korpås, Magnus; Tande, John Olav Giæver; Uhlen, Kjetil Obstfelder. (2009) Cross-border transmission upgrade with increasing wind power penetration.
  Vitenskapelig kapittel
• Korpås, Magnus; Warland, Leif; Tande, John Olav Giæver; Uhlen, Kjetil Obstfelder. (2009) Impact of increased wind integration on power flows and congestion costs in the European transmission network.
  Vitenskapelig kapittel

2008

• Suul, Jon Are Wold; Uhlen, Kjetil; Undeland, Tore Marvin. (2008) Wind Power Integration in Isolated Grids enabled by Variable Speed Pumped Storage Hydropower Plant.
  Vitenskapelig kapittel
• Sørensen, Poul; Norheim, Ian; Meibom, Peter; Uhlen, Kjetil. (2008) Simulations of wind power integration with complementary power system planning tools. Electric power systems research
  Vitenskapelig artikkel

2006

• Eek, Jarle; Uhlen, Kjetil; Gjengedal, Terje. (2006) Wind Power Contribution to Primery Frequency Response in the Nordel Power System. Nordic Wind Power Conference
  Forskningsrapport
• Eek, Jarle; Gjengedal, Terje; Uhlen, Kjetil. (2006) Influence of High Wind Power Penetration on the Nordic Power Grid Primary Control Response. CIGRE
  Forskningsrapport
• Eek, Jarle; Di Marzio, Giuseppe; Lund, Torstein; Fosso, Olav B; Gjengedal, Terje; Uhlen, Kjetil. (2006) Reactive Power Compensation and Voltage Control in Regional Networks with High Wind Power Penetration and Thermal Capacity Constraints. EWEC 2006
  Forskningsrapport
• Doorman, Gerard L.; Uhlen, Kjetil; Kjølle, Gerd Hovin; Huse, Einar Ståle. (2006) Vulnerability analysis of the Nordic power system. IEEE Transactions on Power Systems
  Vitenskapelig artikkel

2005

• Di Marzio, Giuseppe; Eek, Jarle; Uhlen, Kjetil; Fosso, Olav B. (2005) A proposed model for stability assessment of electrical power systems with large scale wind power integration.
  Vitenskapelig kapittel
• Eek, Jarle; Uhlen, Kjetil; Gjengedal, Terje. (2005) Transient stability studies comparing synchronous and doubly fed induction generators.
  Vitenskapelig kapittel
• Di Marzio, Giuseppe; Fosso, Olav B; Uhlen, Kjetil; Palsson, Magni T.. (2005) Large-Scale Wind Power Integration - Voltage Stability Limits and Modal Analysis.
  Vitenskapelig kapittel
• Tande, John Olav Giæver; Uhlen, Kjetil; Gjengedal, Terje. (2005) Options for large scale integration of wind power.
  Vitenskapelig kapittel

2004

• Tande, John Olav Giæver; Uhlen, Kjetil. (2004) Cost analysis case study of grid integration of larger wind farms. Wind Engineering : The International Journal of Wind Power
  Vitenskapelig artikkel
• Doorman, Gerard L.; Kjølle, Gerd Hovin; Uhlen, Kjetil Obstfelder; Huse, Einar Ståle; Flatabø, Nils. (2004) Vulnerability of the Nordic Power System - Executive Summary. SINTEF Energi AS
  Forskningsrapport
• Doorman, Gerard L.; Kjølle, Gerd Hovin; Uhlen, Kjetil Obstfelder; Huse, Einar Ståle; Flatabø, Nils. (2004) Vulnerability of the Nordic Power System. SINTEF Energi AS
  Forskningsrapport

2003

• Pálsson, Magni Tor; Toftevaag, Trond; Uhlen, Kjetil; Tande, John Olav Giæver. (2003) Control concepts to enable increased wind power penetration.
  Vitenskapelig kapittel

2002

• Pálsson, Magni Tor; Toftevaag, Trond; Uhlen, Kjetil; Tande, John Olav Giæver. (2002) Large-scale wind power integration and voltage stability limits in regional networks.
  Vitenskapelig kapittel

2001

• Tande, John Olav Giæver; Uhlen, Kjetil. (2001) Wind turbines in weak grids-constraints and solutions.
  Vitenskapelig kapittel

2000

• Grande, Ove Steinar; Uhlen, Kjetil Obstfelder; Bakken, Bjørn Harald; Hernes, Magnar; Fosso, Olav Bjarte. (2000) Operational Security Assessment - Planning and Control. SINTEF Energi AS
  Forskningsrapport

1998

• Uhlen, Kjetil; Petterteig, Astrid; Kjølle, Gerd Hovin; Holen, Arne Torstein; Løvås, Gunnar Gundersby; Meisingset, M.. (1998) On-line security assessment and control - probabilistic versus deterministic operational criteria.
  Vitenskapelig kapittel