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

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    • PLS score-loading correspondence and a bi-orthogonal factorization 

      Ergon, Rolf (Journal article; Peer reviewed, 2002)
      It is established industrial practice to use the correspondence between partial least squares (PLS) scores and loadings or loading weights as a means for process monitoring and control. Deviations from the normal operating ...

    • Population balance modelling for fertilizer granulation process 

      Vesjolaja, Ludmila; Glemmestad, Bjørn; Lie, Bernt (Journal article; Peer reviewed, 2018)
      Few granulation plants are operated optimally. It is common to operate granulation plants below their maximum design capacity, and in many cases, periodic instabilities may also occur. From a process control and optimization ...

    • Power Converters Dominated Power Systems 

      Gonzalez-Longatt, Francisco; Acosta Montalvo, Martha Nohemi; Chamorro, H. R.; Rueda Torres, Jose Luis (Chapter, 2020)
      The transition to a low-carbon society is the driving force pushing the traditional power system to increase the volume of non-synchronous technologies which mainly use power electronic converters (PEC) as an interface to ...

    • Power Sharing in Three-Level NPC Inverter Based Three-Phase Four-Wire Islanding Microgrids With Unbalanced Loads 

      Sharma, Binod; Pankaj, Prabhat Kumar; Terriche, Yacine; Saim, Abdelhakim; Shrestha, Ashish; Su, Chun-Lien; Guerrero, Josep M. (Peer reviewed; Journal article, 2023)
      The droop-based control schemes are widely used for power-sharing and control of the isolated microgrids. The conventional droop control scheme with inner current and voltage controllers can work effectively under ideal ...

    • Power System Stability Using Modelica 

      Øyvang, Thomas; Winkler, Dietmar; Lie, Bernt; Hegglid, Gunne John (Journal article; Peer reviewed, 2014-12-09)
      This paper is concerned with power system modeling using the Modelica language in comparison to a traditional simulation tool. Though most common power system simulation tools are computationally efficient and reasonably ...

    • Prescriptive analytics for optimal multi-use battery energy storage systems operation: State-of-the-art and research directions 

      Haug, Martin; Bordin, Chiara; Mishra, Sambeet; Moisan, Julien (Peer reviewed; Journal article, 2023)
      This paper presents the state-of-the-art and latest advances in implementing multi-use practices on BESS applications to the power system grid. Representative papers on modeling and optimization methods were selected, most ...

    • Pressure wave propagation in Managed Pressure Drilling- model comparison with real life data 

      Berg, Christian; Stakvik, Jon Åge; Lie, Bernt; Vågsæther, Knut; Kaasa, Glenn-Ole (Peer reviewed; Journal article, 2019)
      Drilling for oil and gas is a complex process, involving pumping of fluid through kilometers of pipes. Even though the drilling fluid has a high speed of sound (˜1000 m/s), the large lengths involved make pressure wave ...

    • Project work as an integrating and revenue-making tool 

      Clausen, Trond (Conference report, 1998)
      The Engineering College at Høgskolen i Telemark has since 1982 practised cooperative learning as the model of promoting student learning. It has earlier been shown that the Telemark Model do enhance many aspects of learning ...

    • Quantitative genetics state-space modeling of phenotypic plasticity and evolution 

      Ergon, Rolf (Peer reviewed; Journal article, 2019)
      Living organisms adapt to changes in environment by phenotypic plasticity and evolution by natural selection (or they migrate). At detailed genetic levels these phenomena are complicated, and quantitative genetics attempts ...

    • Quantization Analysis and Robust Design for Distributed Graph Filters 

      Saad, Leila Ben; Beferull-Lozano, Baltasar; Isufi, Elvin (Journal article; Peer reviewed, 2021)
      Distributed graph filters have recently found appli- cations in wireless sensor networks (WSNs) to solve distributed tasks such as reaching consensus, signal denoising, and recon- struction. However, when implemented over ...

    • Raman Spectroscopy as an Online Monitoring Tool for CO2 Capture Process: Demonstration Using a Laboratory Rig 

      Jinadasa, Wathsala; Jens, Klaus-Joachim; Øi, Lars Erik; Halstensen, Maths (Journal article; Peer reviewed, 2017)
      A laboratory CO2 capture rig at USN was used as a demonstration plant to show the feasibility of Raman spectroscopy for online monitoring of speciation in CO2 capture process. The spectroscopy was integrated to lean and ...

    • Re-interpretation of NIPALS results solves PLSR inconsistency problem 

      Ergon, Rolf (Journal article; Peer reviewed, 2009)
      The well-known nonlinear iterative partial least squares (NIPALS) algorithm is commonly used for computation of components in partial least squares regression (PLSR) with orthogonalized score vectors. Based on generalized ...

    • Reactive Power Control of Grid Interactive Battery Energy Storage System for WADC 

      Torkzadeh, Roozbeh; Chamorro, Harold; Rye, Rebecca; Eliassi, Mojtaba; Toma, Lucian; Gonzalez-Longatt, Francisco (Chapter, 2019)
      The integration of Grid Interactive Battery Energy Storage Systems (GI-BESSs) in energy services, such as peak shaving and load balancing, is a common practice in the modern-day electric power system. However, it is essential ...

    • A Real-Time Flow-Measuring Algorithm for Open Venturi Channel Non-Newtonian Flow 

      Welahettige, Prasanna Kumara Welahetti; Lie, Bernt; Vågsæther, Knut (Peer reviewed; Journal article, 2019)
      A real-time flow measuring algorithm is developed for the open Venturi channel non-Newtonian flow measurement. Using a single level sensor reading at downstream of the open Venturi channel, a drilling-well return flow rate ...

    • Real-time monitoring of enhanced biological phosphorus removal in a multistage EBPR-MBBR using a soft-sensor for phosphates 

      Nair, Abhilash Muralidharan; Gonzalez Silva, Blanca Magdalena; Haugen, Finn; Ratnaweera, Harsha; Østerhus, Stein Wold (Peer reviewed; Journal article, 2020)
      Enhanced biological phosphorus removal (EBPR) from municipal wastewater has been achieved in a multistage Moving Bed Biofilm Reactor (MBBR) configuration. The process operations can be further optimized by real-time ...

    • Recruiting competence from vocational schools : paradise regained? 

      Clausen, Trond; Hagen, Svein Thore; Hasleberg, Harald (Conference report, 2004)
      After a period of declining student enrolment, in 2002 Telemark University College (TUC) took advantage of vocational schools reforms to establish a three years bachelor programme in electrical engineering for a pilot ...

    • Recruiting engineering students from vocational school 

      Clausen, Trond; Hagen, Svein Thore; Hasleberg, Harald; Aarnes, Jens Harald (Conference report, 2003)
      By the consent of the Norwegian Ministry of Education and Research, Telemark University College (TUe), Porsgrunn, Norway, this fall semester started a pilot class in electrical engineering recruiting solely from vocational ...

    • Reduced PCR/PLSR models by subspace projections 

      Ergon, Rolf (Journal article; Peer reviewed, 2006)
      Latent variables models used in principal component regression (PCR) or partial least squares regression (PLSR) often use a high number of components, and this makes interpretation of score and loading plots difficult. ...

    • Relaxed Ziegler-Nichols closed loop tuning of PI controllers 

      Haugen, Finn; Lie, Bernt (Journal article; Peer reviewed, 2013)
      A modification of the PI setting of the Ziegler-Nichols closed loop tuningmethod is proposed. The modification is based on a combination of the Skogestad SIMCtuning formulas for ´´integrator plus time-delay´´ processes ...

    • Review of simulator training practices for industrial operators: How can individual simulator training be enabled? 

      Marcano, Laura; Haugen, Finn; Sannerud, Arne Ronny; Komulainen, Tiina M. (Journal article; Peer reviewed, 2019)
      The aim of simulator training is to improve the safety and integrity of operations. Effective simulator training involves relevant feedback and sound assessment of the operator’s performance. Operators need proper feedback ...