Blar i Institutt for elektro, IT, og kybernetikk på tittel

Viser treff 241-260 av 281

    • State estimation and model-based control of a pilot anaerobic digestion reactor 

      Haugen, Finn; Bakke, Rune; Lie, Bernt (Journal article; Peer reviewed, 2014)
      A state estimator and various model-based control systems have been designed for a real anaerobic digestion (AD) pilot reactor fed with dairy manure. The model used is a modified Hill model which is a relatively simple ...

    • State Estimation of a Thermal Model of Air-cooled Synchronous Generator 

      Pandey, Madhusudhan; Øyvang, Thomas; Lie, Bernt (Peer reviewed; Journal article, 2019)
      In this paper, we extend a previous study on a totally enclosed thermal model of a synchronous generator, with temperature state estimation using experimental data. The extension includes a new formulation of the system ...

    • Static and dynamic eigenvalues in unified stability studies 

      Khodaparast, Jalal; Fosso, Olav B.; Molinas Cabrera, Maria Marta; Suul, Jon Are Wold (Peer reviewed; Journal article, 2022)
      A framework for unified analysis of small-signal and large-signal power system stability based on static and dynamic eigenvalues is proposed in this paper. The presented implementation is based on Gear's method, which is ...

    • Stator Flux-Regulatory Excitation Control in Converter-Fed Synchronous Machines for Pumped-Storage Variable-Speed Hydropower 

      Stavnesli, Jørgen Hagset; Nøland, Jonas Kristiansen (Peer reviewed; Journal article, 2022)
      Pumped-storage hydropower is seen as a promising solution for efficient, large-scale energy storage. One competitive technical solution is the variable-speed hydropower plant (VSHP) configured with a converter-fed synchronous ...

    • Status of Micro/Mini-Grid Systems in a Himalayan Nation: A Comprehensive Review 

      Shrestha, Ashish; Rajbhandari, Yaju; Khadka, Nasib; Bista, Aayush; Marahatta, Anup; Dahal, Rojesh; Mallik, Jiwan Kumar; Thapa, Anup; Hayes, Barry P.; Korba, Petr; Gonzalez-Longatt, Francisco (Peer reviewed; Journal article, 2020)
      Nepal is a Himalayan country with its 83% of its geography being composed of hills and mountains. Around 22% of the Nepalese population is not receiving electricity through the national power utility and is forced to ...

    • Steady-state analysis and voltage control of self-excited induction generator (SEIG) 

      Biglari, Aref; Miraftabi, Seyed Ashkan (Chapter; Peer reviewed, 2012)
      Self-Excited Induction Generators have become the prime choice for wind energy conversion in remote and rural areas due to many advantages over Grid Connected Induction Generators. However, their main drawback is poor ...

    • STEAM FOR STEM - INCLUDE "ART" in STEM (Science, Technology, Engineering and Mathematics) 

      Halvorsen, Hans-Petter; Tretjakova, Rasma; Timmerberg, Josef; THIRIET, Jean; Mylvaganam, Kanagasabapath (Chapter, 2019)
      After a fairly recent study discussed in IEEE Spectrum, with the catchy title, “want-girls-attracted-to-tech-put-a-for-art-in-stem”, on the strategies of attracting more female students to opt for studies in STEM (Science, ...

    • Stochastic MPC For Optimal Operation of Hydropower Station Under Uncertainty 

      Jeong, Changhun; Sharma, Roshan (Peer reviewed; Journal article, 2022)
      The operational condition at the Dalsfoss power station is complicated due to many requirements related to environmental regulations and safety constraints such as the seasonally varying water level requirement at the ...

    • Structural analysis in Julia for dynamic systems in OpenModelica 

      Vytvytskyi, Liubomyr; Lie, Bernt (Peer reviewed; Journal article, 2019)
      In control theory for dynamic systems, the information about observability and controllability of states plays a key role to evaluate the possibility to observe states from outputs, and use inputs to move states to a desired ...

    • Structural observability analysis and EKF based parameter estimation of building heating models 

      Perera, Degurunnehalage Wathsala U.; Perera, M. Anushka S.; Pfeiffer, Carlos Fernando; Skeie, Nils-Olav (Journal article; Peer reviewed, 2016)
      Research for enhanced energy-efficient buildings has been given much recognition in the recent years owing to their high energy consumptions. Increasing energy needs can be precisely controlled by practicing advanced ...

    • Structural observability analysis of large scale systems using Modelica and Python 

      Perera, M. Anushka S.; Lie, Bernt; Pfeiffer, Carlos Fernando (Journal article; Peer reviewed, 2015)
      State observability of dynamic systems is a notion which determines how well the states can be inferred from input-output data. For small-scale systems, observability analysis can be done manually, while for large-scale ...

    • Studentaktive Læringsformer for å Fremme Dyplæring i Høyspenningsteknikk 

      Fjeld, Elin; Tholin, Kristin Rydjord; Øhra, Mattias (Journal article, 2019)
      Denne studien baserer seg på perspektiver rundt dyplæring. Det søkes å vise hvordan mer tudentaktive læringsformer kan skape mere robuste læringspraksiser som igjen muliggjør dyplæring. Studien søker å vise at en slik ...

    • Students’ view on applying for part-time work as an on-campus software developer 

      Lauvås, Per; Dæhli, Olav (Peer reviewed; Journal article, 2022)
      A majority of students work while they are studying. Working will help them financially, but it may also provide other benefits, such as preparing them for work-life after finishing their studies. As academic institutions, ...

    • Study of Fluidization Regimes using OpenFOAM Computational Fluid Dynamics 

      Welahettige, Prasanna Kumara Welahetti; Lie, Bernt; Vågsæther, Knut; Moldestad, Britt Margrethe Emilie (Journal article; Peer reviewed, 2017)
      The objective of this study was using computational fluid dynamics simulation with OpenFOAM to study the fluidization properties for four types of particles classified as Geldart A, B, C and D. Fluidization regimes were ...

    • Surrogate and Hybrid Models for Control 

      Lie, Bernt (Peer reviewed; Journal article, 2019)
      With access to fast computers and efficient machine learning tools, it is of interest to use machine learning to develop surrogate models from complex physics-based models. Next, a hybrid model is a combination model where ...

    • Sustainability analysis and simulation of a Polymer Electrolyte Membrane (PEM) electrolyser for green hydrogen production 

      Béjar Rabascall, Jordi; Mirlekar, Gaurav (Chapter, 2023)
      In recent years, green hydrogen has emerged as an important energy carrier for future sustainable development. Due to the possibility of not emitting CO2 during its generation and use, hydrogen is considered a perfect ...

    • Sustainability Awareness through STEAM+ 

      Timmerberg, Josef; Halvorsen, Hans-Petter; Viumdal, Håkon; Mylvaganam, Saba (Peer reviewed; Journal article, 2021)
      Innovative technology enterprises have been working closely with OECD countries to address issues related to sustainability. There are many acronyms associated with STEM, e.g. STEM+, incorporating the humanities, community ...

    • Temperature control of a pilot anaerobic digestion reactor 

      Haugen, Finn; Bakke, Rune; Lie, Bernt (Journal article; Peer reviewed, 2013)
      Results of analysis and design and implementation of a temperature control system for a practical pilot anaerobic digestion (AD) bioreactor fed with dairy waste are presented. A dynamic model of the reactor temperature is ...

    • The curriculum is dead - long live the curriculum 

      Clausen, Trond (Conference report, 1995)

    • The environmental zero‐point problem in evolutionary reaction norm modeling 

      Ergon, Rolf (Journal article; Peer reviewed, 2018)
      There is a potential problem in present quantitative genetics evolutionary modeling based on reaction norms. Such models are state‐space models, where the multivariate breeder's equation in some form is used as the state ...